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Home My WebLink AboutRS_Soil_Remediation_Result_Report_240607_v1 STRIDE Bus Rapid Transit South Renton Transit Center (SRTC) Site Plan Review, Conditional Use Permit, Master Site Plan Review, and Lot Line Adjustment Application Attachment 37 Soil Remediation Result Report June 2024 Prepared by the SUBMITTED TO: Sound Transit 401 South Jackson Street Seattle, WA 98104 BY: Shannon & Wilson 400 N. 34th Street, Suite 100 Seattle, WA 98103 (206) 632 -8020 www.shannonwilson.com REMEDIAL ACTION REPORT Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) RENTON, WASHINGTON February 8, 2024 Shannon & Wilson No: 109693-003 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 PAGE INTENTIONALLY LEFT BLANK FOR DOUBLE-SIDED PRINTING Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 iiCONTENTSCONTENTS 1 Introduction................................................................................................................................1 1.1 Authorization....................................................................................................................1 1.2 Objective and Responsibilities........................................................................................1 2 Background.................................................................................................................................1 2.1 Site Location and Description.........................................................................................1 2.2 Historical Property Land Use and Operations ............................................................2 2.3 Geologic and Hydrogeologic Settings...........................................................................2 2.3.1 Site Geology .........................................................................................................2 2.3.2 Site Hydrogeology...............................................................................................3 2.4 Previous Investigations...................................................................................................3 2.5 Conceptual Site Model ....................................................................................................3 3 Remedial Action.........................................................................................................................5 3.1 Test Pit...............................................................................................................................5 3.2 Well Decommissioning ...................................................................................................6 3.3 Surface Demolition and Materials Handling...............................................................6 3.4 Stormwater and Excavation Dewatering......................................................................6 3.5 Remedial Excavations, Oxidizer, and Biostimulation.................................................7 3.5.1 Area 1....................................................................................................................8 3.5.2 Area 2....................................................................................................................9 3.5.3 Area 3....................................................................................................................9 3.5.4 Area 4..................................................................................................................10 3.5.5 Area 5..................................................................................................................10 3.5.6 Area 6..................................................................................................................11 3.6 Hydraulic Hoists Removal............................................................................................11 3.7 Oil-Water Separator Removal......................................................................................12 4 Updated Conceptual Site Model............................................................................................12 5 Conclusions and Recommendations.....................................................................................13 6 Limitations, Uncertainty, and Risk........................................................................................13 7 References .................................................................................................................................14 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 iiiCONTENTSExhibits Exhibit 3-1: Contaminants of Concern and Summary of Remedial Actions*..............................8 Tables Table 1: Groundwater Elevations Table 2: Soil Sampling Summary (4 pages) Table 3: Remediation Area 1 Confirmation Sample Analytical Results (2 pages) Table 4: Remediation Area 1 Characterization Sample Analytical Results Table 5: Remediation Areas 3 and 5 Sample Analytical Results Table 6: Remediation Area 4 Confirmation Sample Analytical Results Table 7: Area 4 Toxicity Equivalency Factor-Adjusted Polycyclic Aromatic Hydrocarbon Concentrations (3 pages) Table 8: Remediation Area 6 Sample Analytical Results Figures Figure 1: Vicinity Map Figure 2: Site Plan Figure 3: Area 1 Excavation Figure 4: Area 3 Excavation Figure 5: Area 4 Excavation Figure 6: Area 5 Excavation Figure 7: Hoist Removal Locations Appendices Appendix A: Previous Studies Appendix B: Well Decommissioning Reports Appendix C: Laboratory Analytical Reports Appendix D: Disposal Documentation Important Information Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 ivACRONYMSACRONYMS μg/L micrograms per liter AST aboveground storage tank bgs below ground surface cPAH carcinogenic polycyclic aromatic hydrocarbons DEA David Evans and Associates, Inc. Ecology Washington Department of Ecology ERRG Engineering/Remediation Resource Group, Inc. ESA Environmental Site Assessment mg/kg milligrams per kilogram MTCA Model Toxics Control Act OWS oil-water separator PAHs polycyclic aromatic hydrocarbons PCS petroleum-contaminated soil PID photoionization detector SWPPP Stormwater Pollution Prevention Plan TEQ toxicity equivalent TPH-D total petroleum hydrocarbons – diesel range TPH-G total petroleum hydrocarbons – gasoline range TPH-O total petroleum hydrocarbons – oil range UST underground storage tank Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 1 1 INTRODUCTION 1.1 Authorization Shannon & Wilson has completed remediation project observation for remedial action activities completed at the South Renton Transit Center site located at 750 Rainier Avenue South in Renton, Washington. This work was completed pursuant to Shannon & Wilson’s Standard Task Order (RTA/OA 0623-18A Task Order No. 91.00), as authorized on June 29, 2022 by Mr. Kevin Jeffers and Mr. Dwight Schock of DEA, the prime architectural and engineering consultant for Sound Transit. 1.2 Objective and Responsibilities The objective of the remedial action was to address known soil and groundwater contamination by remedial excavation, introduction of in situ chemical oxidizer, and the injection of biostimulation material. Remedial site work (including setup and demobilization) occurred between August 6, 2022, and January 27, 2023. The remedial contractor for this project was Engineering/Remediation Resource Group, Inc., (ERRG) of Redmond, Washington, under contract to Sound Transit. Shannon & Wilson's scope of work included the following tasks: Perform submittal reviews, conduct field observation during remedial activities, and provide summary reporting. Perform Request for Information reviews and provide input. Observe and document remedial excavation and injections. Assist with field screening and segregation of excavated material. Collect confirmation samples from excavations for analytical testing. 2BACKGROUND 2.1 Site Location and Description The site is in the northwest quarter of the northeast quarter of Section 19, Township 23 North, Range 5 East of the Willamette Meridian (Figure 1). The overall site is comprised of four parcels, most of which had been developed with structures until demolition prior to remedial activity (Figure 2): Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 2 RTN001 (750 Rainier Avenue S). Consists of 3.43 acres formerly developed with an auto showroom and shop building used for auto detailing. RTN002 (750 Rainier Avenue S). Consists of 1.98 acres developed as a former auto body shop and three towers for power transmission lines (the towers are still present). RTN003 (200 S Grady Way). Consists of 1.89 acres developed as a used car sales office and service garage at the western end of the parcel, and an active auto parts office and service garage at the eastern end. RTN004 (200 S Grady Way). Consists of 0.99 acre developed as a paved parking. 2.2 Historical Property Land Use and Operations The research conducted for past assessments indicates that the subject property was first developed with a railroad line and an electric passenger railway line in the early part of the 20th Century. From the 1940s to mid-1960s, a barn and a “cycle shop” were present, as well as a possible fruit stand and residences that may have been located offsite. From 1968 to the present, the site has been occupied by auto dealerships, including service shops and a body shop. Associated facilities have included underground storage tanks (USTs), aboveground storage tanks (ASTs), subfloor hydraulic hoists, floor drains, trench drains, oil/water separators, alignment pits, and paint spray booths. Products used and stored at the site have included heating oil, gasoline, fresh and used motor oil, automatic transmission fluid, hydraulic oil, paints, and chlorinated and non-chlorinated solvents. 2.3 Geologic and Hydrogeologic Settings This section describes the general geologic setting of the site vicinity and discusses the subsurface conditions. The geologic and hydrogeologic summaries below are based on a review of geologic documents and Shannon & Wilson’s environmental explorations conducted at the site (Shannon & Wilson, 2017, 2019, and 2021). 2.3.1 Site Geology Subsurface conditions encountered during field investigations and remedial excavations included fill underlain by fine-grained and sandy soils. Fill is generally 1 to 2 feet thick across most of the site, except for the southeast corner where fill is 5 to 6 feet thick. Native soil units encountered at the site are consistent with alluvium and low-energy lacustrine deposits of the Cedar River floodplain and the historic Lake Washington shoreline. These units consist of poorly graded sand and poorly graded sand with silt; silty sand; silt with sand; silt; and organic clay. Peat and organic silt/clay were encountered beneath RTN003. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 3 2.3.2 Site Hydrogeology Groundwater elevation monitoring conducted in May 2019 documented that the depth-to-groundwater was between 6 to 8.5 feet below ground surface (bgs) (Table 1). Groundwater was predominantly confined to the poorly graded sand unit encountered throughout most of the site. A potentiometric map generated from the May 2019 data shows site groundwater flow predominately to the west and southwest with a hydraulic gradient of approximately 0.003 to 0.008 foot per foot (Shannon & Wilson, 2019; Appendix A). However, groundwater flow became more southerly towards the westernmost portion of the site. This refraction in flow direction may be associated with increased subsurface compaction near Rainier Avenue South; increased compaction would decrease porosity and permeability of subsurface soils, potentially altering groundwater flow direction. On December 9, 2022, depth to groundwater ranged between approximately 3.4 to 7.1 feet bgs (Table 1) with a groundwater flow direction to the southwest. 2.4 Previous Investigations Previous site environmental studies completed at the site include two Initial Investigation Field Reports from the Washington State Department of Ecology (Ecology) and three Environmental Site Assessments (ESAs) from Shannon & Wilson. Shannon & Wilson completed a Phase I ESA and Phase II ESA to support Sound Transit due diligence evaluations, and contaminated soil and groundwater were confirmed on site. The Supplemental ESA was prepared for Sound Transit’s legal counsel to support property negotiations. The Supplemental ESA investigation plan was developed concurrently with the previous property owner’s environmental consultant and focused on evaluating groundwater flow direction and extent of contamination (and not necessarily remediation design/site characterization). Select studies are included in Appendix A. 2.5 Conceptual Site Model As previously reported in the Phase II investigation report (Shannon & Wilson, 2017) and in the Supplemental ESA (Shannon & Wilson, 2019), areas of contamination and release sources were identified as follows: Soil contaminated with diesel- and lube oil-range total petroleum hydrocarbons (TPH-D and TPH-O, respectively) above Model Toxics Control Act (MTCA) cleanup criteria was encountered near the northeast portion of the RTN001 service building. This contamination is likely associated with numerous former ASTs and USTs that previously contained automatic transmission fluid and motor oil, two existing waste oil ASTs in and near the building, hydraulic hoists, and shop activities. Contaminated soil above the cleanup criteria was also located near the north end of the RTN002 body shop and at “hotspots” located in Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 4 the parking lot west of the RTN001 service building, east of the RTN002 body shop, and to the south of RTN004 Walker’s Renton Mazda. The gasoline constituents of benzene, toluene, ethylbenzene and xylenes were encountered in soil samples located north of the RTN001 service building and near the former gasoline dispenser and USTs. These detections are not in excess of the MTCA cleanup criteria. Detectable levels of TPH-D and TPH-O were present in soil at three of the four locations where former USTs were removed. At each of these locations, there was evidence of stained soil and/or hydrocarbon odors within or at the bottom of the fill material of the former excavation. This indicates that there was likely residual contaminated soil at RTN001-2, RTN001-4, and RTN001-10. Although TPH-D and TPH-O were not detected at RTN001-3, these contaminants were detected in samples RTN002-1 and RTN002-2 and may have been associated with the storage and conveyance of waste oil from the garage to the UST. The presence of polycyclic aromatic hydrocarbons (PAHs) was detected in soil samples beneath and near the service (RTN001) and body shop (RTN002) buildings likely associated with automotive related use. It is likely that the detection at RTN004-1 was associated with creosote from treated wood from the former railway line as creosote odors were observed during sampling. Polychlorinated biphenyls were detected below the MTCA cleanup criteria in soil in the upper 6 feet at RTN002-3 and RTN002-4. It is likely this residual is associated with spills, drips, and leaks from hydraulic oil used at the body shop. Groundwater contaminated with TPH-D and TPH-O above the MTCA cleanup criteria was encountered beneath the RTN001 service building and in the north area of the RTN002 body shop. Furthermore, plumes of groundwater contamination appear to be migrating southward from an area of the former body shop and service building. (A transect of remedial injections was completed to intercept groundwater contamination, see Section 3.5.6.) Elevated concentrations of arsenic, chromium, and lead were detected in groundwater samples beneath and near the RTN001 service building, near the RTN003 used car sales office, and south of the RTN004 Walker’s Renton Mazda building along the former electric railway line. Except for arsenic, these elevated concentrations are present in the total and not the dissolved analytical results. It is common to observe elevated concentrations of the total metals analysis due to the high turbidity in samples collected from a probe rig and not a fully developed monitoring well. Dissolved metals concentrations are likely to be more representative of groundwater conditions as typically only the dissolved metals fraction will migrate through porous media. Elevated concentrations of dissolved arsenic is concluded Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 5 to be the result of relatively reducing groundwater conditions caused by the degradation of petroleum contamination (Ecology, 2018). Arsenic concentrations are expected to decrease concurrently with residual petroleum concentration, and arsenic is not considered a contaminant of concern in and of itself. Vinyl chloride was found present above the MTCA Method A cleanup criteria of 0.20 microgram per liter (μg/L) in groundwater at RTN001-10 (0.33 μg/L). In accordance with Ecology’s Statistical Guidance for Ecology Site Managers (Ecology, 1992), the following requirements have been met to demonstrate compliance: The upper 95th percentile confidence limit on the true mean concentration at the site must be less than the soil cleanup level – upper 95 th confidence limit (0.13 μg/L) does not exceed the MTCA Method A cleanup of 0.20 μg/L. Less than 10% of the samples can exceed the soil cleanup level – one of the 19 total groundwater samples was detected for vinyl chloride, this detection exceeded the MTCA Method A cleanup level, this calculates to 5.2% of the total. No single sample can be greater than two times the soil cleanup level – the concentration of RTN001-10:GW (0.33 μg/L) is less than two times the MTCA Method A cleanup criteria. Vinyl chloride was not detected at sample locations within the vicinity of RTN001 10, which indicates that the presence of this contaminant is likely isolated and not widespread. 3 REMEDIAL ACTION For these remedial actions, Method A cleanup levels were selected as promulgated by Ecology pursuant to the MTCA. ERRG was responsible for permits and notification, excavation of petroleum-contaminated soil (PCS), application of chemical oxidizer, assistance in excavating test pits, and injection of chemical biostimulation material. Shannon & Wilson was responsible for project monitoring and other activities, as outlined in this report’s introduction. 3.1 Test Pit Prior to beginning the remedial actions at the site, one test pit was completed. The purpose was to observe potential site conditions where excavation is planned to support future development. On August 31, 2022, TP-2 was excavated to approximately 8.2 feet bgs (Figure 2). During excavation, soil was screened for potential contamination using field observations and photoionization detector (PID) methods. No signs of contamination were observed throughout the test pit. Groundwater was observed at approximately 7.5 to 8 feet Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 6 bgs. Soil lithology included a brown, silty sand with gravel and trash throughout from approximately 0 to 2 feet bgs; a gray, silty sand with gravel and trash throughout from approximately 2 to 3 feet bgs; a gray, silty clay with sand and trash from approximately 3 to 7.2 feet bgs; and a gray, silty gravel with sand to silty sand with gravel from approximately 7.2 to 8.2 feet bgs. No samples were collected from the test pit. Following excavation, the pit was backfilled with the excavated material. 3.2 Well Decommissioning During remedial actions on site, two previously installed groundwater monitoring wells were decommissioned. Monitoring well RTN001-12 was decommissioned on September 1, 2022, and monitoring well MW-4 was decommissioned on September 26, 2022 (Figure 2). RTN001-12 was located within remedial excavation Area 1 and MW-4 was located within the hoist removal area. Because of their locations, the monitoring wells needed to be decommissioned prior to commencing the excavations/hoist removals. Well decommissioning reports are included in Appendix B. 3.3 Surface Demolition and Materials Handling ERRG was responsible for removal of surface asphalt paving and/or concrete building slabs, remedial excavation and remedial activity, and backfill to grade with clean material. Excavated material was stored on plastic sheeting while awaiting confirmational sampling results. 3.4 Stormwater and Excavation Dewatering Construction stormwater was managed according to the Stormwater Pollution Prevention Plan (SWPPP) prepared by ERRG. Ecology issued an administrative order to Sound Transit to comply with the Washington’s Construction Stormwater General Permit. ERRG was in turn issued a transfer of coverage to be responsible for permit coverage, which resulted in ERRG preparing and implementing the SWPPP. Approximately 9,500 gallons of surface water were collected from the site and discharged to the storm sewer. (This water did not enter excavations.) Water removed from remedial excavations was potentially impacted with petroleum hydrocarbons and metals (arsenic, chromium, and lead). Therefore, a water treatment system was set up with discharge to the sanitary sewer subject to pre-treatment requirements. The treatment system included chitosan-enhanced sand filtration for fine particulate removal, granulated activated carbon filtration for petroleum compound removal, and organoclay and alumina media filtration to remove metals and arsenic. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 7 Approximately 43,900 gallons were collected from site excavations, treated, and discharged to sanitary sewer (process water is not allowed in storm). 3.5 Remedial Excavations, Oxidizer, and Biostimulation Remedial actions are depicted in Figure 2 and summarized in Exhibit 3-1 below. These actions included remedial excavation, in situ chemical oxidation, and injection of biostimulation compound. The combined surface area of the four remedial excavations (Areas 1, 3, 4, and 5) is approximately 5,000 square feet, and the chemical injections areas (Areas 2 and 6) encompass approximately 4,800 square feet. A summary of soil samples collected during remedial excavations are shown in Table 2. Soil sample laboratory analytical reports are included in Appendix C. During remedial excavation activities, a total of approximately 3,504 tons of soil was excavated and disposed of offsite. Approximately 452 tons of this soil was from the Area 1 overexcavation and hoist excavations/removals. Soil was transported to transfer facilities operated by Republic, Waste Management, or AAA Monroe Rock Corporation for disposal. Disposal receipts are provided in Appendix D. Approximately 350 tons of excavated overburden soil from Areas 1 and 3 were deemed acceptable for reuse onsite as backfill. Overburden soil from these two areas was deemed acceptable based on field screening and laboratory testing. Excavated soil from other remedial excavation areas was not reused as backfill on site. (The project site is located within a wellhead protection area. Therefore, overburden soils were tested. Soil used as backfill contained no contaminants of concern above Category 1 reuse criteria (as defined in Ecology’s Guidance for Remediation of Petroleum Contaminated Sites, Table 12.1) (Ecology, 2016). Following remedial actions, the top surface of each area was restored to original grade. The top 6 inches of each area was backfilled using an imported coarse gravel base. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 8 Exhibit 3-1: Contaminants of Concern and Summary of Remedial Actions* Area Contaminants of Concern (Maximum Concentration in Soil [mg/kg]) Contaminants of Concern (Maximum Concentration in Groundwater [PPg/L])Remedial Action 1 Diesel (3,900), Lube Oil (28,000) Diesel (3,900), Lube Oil (16,000) Excavated up to 12.5 feet bgs1, mix in situ oxidizer (Regenesis PersulfOx®) in bottom 4 feet of backfill 2—Diesel (640), Lube Oil (1,200) Completed injection of dual-action binding and biostimulation material (Regenesis Petrofix®) 3 Diesel (1,700), Lube Oil (2,500)— Excavated to 8 feet bgs 4 Diesel (650), Lube Oil (2,300), cPAH (0.14)— Excavated to 8 feet bgs 5 Lube Oil (2,000) — Excavated to 8 feet bgs 6 Diesel (1,900), Lube Oil (37,000) Diesel (3,900), Lube Oil (16,000)2 Injection of dual-action binding and biostimulation material (Regenesis Petrofix®) NOTES: Maximum depth of excavation in Area 1 was approximately 12.5 feet bgs. In the northeast quarter of Area 1, soil was excavated to 6 feet bgs. Figure 3 shows the Area 1 excavation extents following confirmation sampling. Based on groundwater sampling in Area 1. *Maximum concentrations reflected are those identified prior to remediation. — = not analyzed;Pg/L = micrograms per liter; bgs = below ground surface; cPAH = carcinogenic polycyclic aromatic hydrocarbon; mg/kg = milligrams per kilogram 3.5.1 Area 1 Area 1 excavation began on September 1, 2022. The Area 1 excavation was originally designed as a 65- by 60-foot rectangular excavation. The target depth of the excavation was 12 feet bgs. The sidewalls of the excavation were sloped to allow workers to collected confirmation soil samples. Sidewalls of the excavation were sloped (1:1). Based on field screening and confirmation sampling during excavation of Area 1, the excavation area was modified to target soil removal of soil with contaminants of concern exceeding MTCA Method A cleanup levels. The final extent and depth of the Area 1 excavation is shown in Figure 3. The excavation was expanded in the northwest area an additional 14 feet to the west. In the northeast area of the excavation, soil was only excavated to 6 feet bgs. In the northwest area of the excavation, soil was excavated up to 12.5 feet bgs (see Figure 3). While excavating Area 1, groundwater seepage was observed between 11 and 9 feet bgs. A total of 20 (17 if we exclude samples overexcavated) sidewall confirmation samples and nine (eight if we exclude samples overexcavated) base confirmation soil samples were collected. Confirmatory sampling is shown in Figure 3 and included in Table 3. Soil Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 9 samples were analyzed for TPH gasoline-range (TPH-G), TPH-D, and TPH-O. Characterization sample results are summarized in Table 4. In early October 2022, following remedial excavation in Area 1, an in situ chemical oxidant, Regenesis PersulfOx®, was mixed into imported gravel borrow backfill to oxidize remaining source contaminants in the smear zone of the water table (approximately 12 to 8 feet bgs). A total of approximately 11,571 pounds of Regenesis PersulfOx® compound was mixed with the backfill. 3.5.2 Area 2 Prior to biostimulation injections in Area 2, two steel hoist cylinders, one steel secondary containment box, one concrete secondary containment box, and two approximately 35-gallon steel hydraulic oil reservoirs were excavated and removed from Area 2 (Figure 2). Some impacted soil was observed during hoist excavations. Following hoist removal, the area was backfilled using the excavated soil from Area 2 and imported gravel borrow. In Area 2, a dual-purpose phase biostimulation compound, Regenesis Petrofix®, was injected into the subsurface. Injections of biostimulation compound occurred between November 21 and December 12, 2022. The dual-purpose compound includes both activated carbon to bind dissolved phase hydrocarbons and biostimulating electron receptors. Per the manufacturer’s recommendations, injections were spaced at 5-foot centers perpendicular to the groundwater flow direction (west-east), and at 12-foot centers parallel to the groundwater flow direction (north-south). A total of 60 injection locations were completed in Area 2. At each location, injection of approximately 90.75 lbs of Regenesis Petrofix® occurred from 11 to 20 feet bgs (per the manufacturer’s recommendation). 3.5.3 Area 3 Area 3 was excavated on August 29, 2022. The Area 3 excavation was an approximately 20- by 20-foot-square excavation (see Figure 4). The area was excavated to 8 feet bgs. During excavation, field indications of petroleum hydrocarbons were sometimes observed. Groundwater seepage was observed at 8 feet bgs. An organic sheen was observed on top of the groundwater. The excavated material included silty sand with gravel; silty, clayey soil; organics; concrete pieces; scrap metal; plastic pieces; and wood. Following excavation of Area 3, confirmation soil samples were collected from each sidewall and from the base of the excavation (total of five confirmation soil samples). Sidewall samples were collected between 5 and 6 feet bgs. Samples were analyzed for TPH-D and TPH-O. TPH-D was not detected above laboratory reporting limits in any of the confirmation soil samples. TPH-O was detected in one sidewall sample at 100 milligrams Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 10 per kilogram (mg/kg), which is below the MTCA Method A cleanup level of 2,000 mg/kg. Confirmatory sampling analytical data is included in Table 5. Following confirmation soil sampling, Area 3 excavation was backfilled using import gravel borrow and overburden reuse soil from Areas 1 and 3. 3.5.4 Area 4 Area 4 excavation occurred on August 30, 2022. The Area 4 excavation was an approximately 20- by 20-foot-square excavation (see Figure 5). The area was excavated to a depth of approximately 8 feet bgs. During excavation, burnt garbage, including wood and a mattress, was uncovered in the middle of the excavation at approximately 3 feet bgs. Additional garbage was uncovered throughout the excavation to approximately 3.5 feet bgs. A gray, silty clay was encountered between 4 and 8 feet bgs. Coarse grain sand and groundwater could be seen at the maximum depth of the excavation (8 feet bgs). During excavation, a rancid organic smell was observed throughout most of the excavated soil. An unknown concrete sewer line was uncovered in the southeast corner of the excavation (at approximately 3 feet bgs), this was the apparent source of the rancid organic odor. The PID did not record a response to the presence of volatile compounds throughout the day. Following excavation of Area 4, confirmation soil samples were collected from each sidewall and from the base of the excavation (a total of five confirmation soil samples). Sidewall samples were collected between 3 and 3.5 feet bgs. Samples were analyzed for PAHs, TPH-D, and TPH-O. TPH-D was not detected above laboratory reporting limits in any of the confirmation soil samples (see Table 6). TPH-O was detected in four of the sidewall samples (maximum detection of 200 mg/kg), but below the MTCA Method A cleanup level of 2,000 mg/kg. Total carcinogenic polycyclic aromatic hydrocarbon (cPAH) toxicity equivalents (TEQs) were calculated for cPAH detections in soil samples (see Table 7). Based on the total cPAH TEQ adjusted concentrations, detected PAHs in Area 4 confirmation soil samples were below MTCA Method A cleanup levels. Following confirmation soil sampling, Area 4 excavation was backfilled using import gravel borrow and overburden reuse soil from Area 3. 3.5.5 Area 5 Area 5 excavation occurred between September 13 and 20, 2022. The Area 5 excavation was an approximately 20- by 10-foot-square excavation (see Figure 6). The area was excavated to approximately 8 feet bgs. During excavation, a faint lube oil smell was observed in soil from the excavation at approximately 3.5 feet bgs. A gray clay layer was observed at approximately 5.2 feet bgs. Groundwater seepage was observed at 8 feet bgs. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 11 Following excavation of Area 5, confirmation soil samples were collected from each sidewall and from the base of the excavation (a total of five confirmation soil samples). Sidewall samples were collected between 5 and 5.5 feet bgs. Samples were analyzed for TPH-D and TPH-O. TPH-D was not detected above laboratory reporting limits in any of the confirmation soil samples. TPH-O was detected in two sidewall samples (maximum detection of 110 mg/kg), but below the MTCA Method A cleanup level of 2,000 mg/kg. Confirmatory sampling analytical data is included in Table 5. Following confirmation soil sampling, the Area 5 excavation was backfilled using import gravel borrow to approximately 2 feet bgs, followed by reuse overburden soil from Area 3. 3.5.6 Area 6 While completing remedial actions at the site, hydraulic hoists were encountered south of Area 1 (see Figure 7). These hoists were removed (see Section 3.6) and disposed of offsite. While removing the hydraulic hoists, petroleum-impacted soil was encountered in this area (see Table 8). As a supplemental remedial action, Regenesis Petrofix® was also injected in a transect south of Area 1. Area 6 injections occurred between January 16 and January 26, 2023. The purpose of these injections in Area 6 was to enhance remediation of petroleum compounds present in groundwater and in soil within the zone between the high and low water table, or the so-called “smear zone”. The Area 6 transect consisted of two rows of injection points orientated roughly west-east and on 5-foot centers in each row. The two rows were situated approximately 12 feet apart. A total of 40 injection locations were completed in Area 6. At each location, injection of approximately 84 lbs of Regenesis Petrofix® occurred from 5 to 15 feet bgs (per the manufacturer’s recommendation). 3.6 Hydraulic Hoists Removal As part of remedial actions at the site, 16 hydraulic hoists were removed from the area south of Area 1 (see Figures 2 and 7). Removal of hydraulic hoists occurred between October 24 and 31, 2022. Hydraulic hoists consisted of a steel hoist cylinder, a steel secondary containment box, and an approximately 35-gallon steel hydraulic oil reservoir. During removal it was observed that the steel secondary containment boxes were filled with pea-gravel. Approximately half of the steel secondary containment boxes had 12 to 16 inches of concrete around the sides and base of the boxes. Hydraulic oil remained in eight of the steel hydraulic oil reservoirs. This remaining oil was pumped from the tanks using a peristaltic pump and/or Vactor truck. During removal, the hydraulic hoists (cylinders, boxes, and reservoirs) were excavated, removed, and wrapped in plastic sheeting. The plastic sheeting was surrounded by straw wattles to contain incidental leaking of residual hydraulic oil. Hydraulic hoists were disposed of offsite. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 12 During excavation and removal of the hydraulic hoists, soil with a petroleum-like odor was observed below nine of the hydraulic hoists. This soil consisted of a black, medium sand and was present at a depth of approximately 8 to 12 feet bgs. Groundwater was observed seeping into the hoist excavations at approximately 9 to 11 feet bgs. Soil samples were collected from the base of the nine hydraulic hoist excavations (see Figure 7). TPH-O was detected at concentrations exceeding MTCA Method A cleanup levels in five of these soil samples (see Table 8). TPH-D was detected up to 1,900 mg/kg and TPH-O was detected up to 37,000 mg/kg. In soil, the MTCA Method A cleanup level for both TPH-D and TPH-O is 2,000 mg/kg. Limited additional excavation of PCS occurred below the hydraulic hoists. Additional Petrofix® was injected in a two-row transect situated hydraulically down gradient of the hoist location (see Section 3.5.6). 3.7 Oil-Water Separator Removal In addition to remedial excavation and demolition of concrete pads, an oil-water separator (OWS) was removed from the site (see Figure 2). ERRG removed the OWS on December 15, 2022. The OWS was approximately 2- by 4- by 5-feet in size. The base and walls of the OWS were constructed of concrete. Prior to removal, a Vactor Truck was used to remove remaining water and sediment in the bottom of the OWS. A slight sheen was observed on the water removed. The outflow pipe (formerly draining into the stormwater system) was plugged with concrete. The OWS was removed using an excavator. Brown, silty sand with gravel was observed on the walls and base of the excavation. No visual or olfactory indications of contamination were observed while removing the OWS. Based on observations and field screening, no soil samples were collected from the OWS excavation. Following removal of the OWS, the excavation was backfilled using excavated soil and import gravel borrow. The upper foot of the excavation was backfilled with imported coarse gravel. 4 UPDATED CONCEPTUAL SITE MODEL The majority of soil contaminated with petroleum and petroleum constituents at concentrations above MTCA Method A cleanup levels has been excavated and disposed of off-site. Where soil contamination has extended into the water table, i.e., in Area 1, the overlying impacted soil was excavated and oxidizer (PersulOX®) mixed into the saturated zone to reduce the source of groundwater contamination. Dual-action activated carbon binder and biostimulation compound (Petrofix®) was injected into the surface in Areas 2 and 6 to address remaining groundwater contamination. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 13 Planned development of the South Renton Transit Center include paving the entire site. The paving will prevent direct human contact to remaining areas of soil contamination, which are discontinuous and not aerially expansive, and will limit the infiltration of precipitation and mobilization of soil contamination to groundwater. With the injection of Petrofix® groundwater contamination should continue to attenuate. 5 CONCLUSIONS AND RECOMMENDATIONS Soil with concentrations of petroleum hydrocarbons and related contaminants has been removed. To assess the degradation of remaining petroleum hydrocarbons in groundwater, it is recommended that a groundwater monitoring program be implemented. Wells used for monitoring should include the following locations: A background location hydraulically upgradient of Area 1. An intermediate location between Area 1 and the transect of injection points in Area 6. At least two locations hydraulically downgradient of Area 6. A combination of existing and newly installed wells could be employed, with a monitoring semiannual or quarterly monitoring frequency. Consistent with the approach recommended by Ecology (2018) groundwater monitoring to include analyzing samples for TPH-G both with silica gel cleanup and without silica gel cleanup to monitor the relative preponderance of the polar metabolites of petroleum degradation, and as an indirect indicator of reducing conditions. 6 LIMITATIONS, UNCERTAINTY, AND RISK The analyses, conclusions, and recommendations contained in this report are based on site conditions as they presently exist, and further assume that the explorations are representative of the subsurface conditions at the Project site; that is, the subsurface conditions everywhere are not significantly different from those disclosed by our explorations. Within the limitations of the scope, schedule, and budget, the analyses, conclusions, and recommendations presented in this report were prepared in accordance with generally accepted professional environmental engineering principles and practice in this area at the time this report was prepared. We make no other warranty, either express or implied. Our conclusions and recommendations are based on our understanding of the Project as described in this report and the site conditions as interpreted from the explorations. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 14 If, during construction, subsurface conditions different from those encountered in the recent field explorations are observed or appear to be present, we should be advised at once so that we could review these conditions and reconsider our recommendations where necessary. If there is substantial lapse of time between the submission of this report and the start of work at the site, or if conditions have changed because of natural forces or construction operations at or adjacent to the site, we recommend that this report be reviewed to determine the applicability of the conclusions and recommendations concerning the changed conditions or the time lapse. This report was prepared for the exclusive use of Sound Transit and members of the design team as approved by Sound Transit. It should be made available to prospective contractors for information on factual data only, and not as a warranty of subsurface conditions such as those interpreted from the exploration logs and presented in the discussions of subsurface conditions included in this report. Shannon & Wilson has prepared the document, "Important Information About Your Geotechnical/Environmental Report," to assist you and others in understanding the use and limitations of our reports. 7 REFERENCES Shannon & Wilson, 2017, Phase II environmental site assessment, Sound Transit right-of- way #RTN001 through #RTN004, Sound Ford property, 750 Rainier Avenue S. and 200 S. Grady Way, Renton, Washington: Report prepared by Shannon & Wilson, Seattle Wash., for Sound Transit, Seattle, Wash., project no. 21-1-16700-301, March 9. Shannon & Wilson, 2019, Supplemental environmental site assessment, Sound Ford Renton (Sound Transit ROW nos. RTN001-RTN004), Renton, Washington: Report prepared by Shannon & Wilson, Seattle Wash., for Miller Nash Graham & Dunn LLP, Seattle, Wash., project no. 102225-001, June 28. Shannon & Wilson, 2021, Environmental letter report, South Renton Transit Center, 750 Rainier Avenue S and 200 S Grady Way, Renton, Washington: Report prepared by Shannon & Wilson, Seattle Wash., for Sound Transit, Seattle, Wash., project no. 104059-202, December 9. Washington State Department of Ecology (Ecology), 1992, Statistical guidance for Ecology site managers, Washington State Department of Ecology, Toxics Cleanup Program, from Carl L. Fleskes, Program Manager, Toxics Cleanup Program, Olympia, WA, August 1. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 15 Washington State Department of Ecology (Ecology), 2016, Guidance for remediation of petroleum contaminated sites: Document prepared by Ecology Toxics Cleanup Program, Olympia, Wash., publication no. 10-09-057, June. Washington State Department of Ecology (Ecology), 2018, Puyallup Gas Station (1201-1203 Puyallup Ave, Tacoma) Groundwater Arsenic. Washington State Department of Ecology memorandum from Charles San Juan, TCP-HQ, to Aaren Fiedler, TCPSWRP, September 21, Lacey, WA. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Remedial Action Report Monitoring Well ID Ecology Tag ID Surveyed Monitoring Well Elevation1 (feet) TOC Elevation (feet) Date Depth to Water (feet below TOC) Groundwater Elevation (feet) 5/30/2019 5.70 20.20 7/22/2021 6.25 19.65 12/9/2022 3.41 22.49 5/30/2019 7.12 18.49 7/22/2021 7.24 18.37 12/9/2022 6.46 19.15 5/30/2019 7.28 19.57 7/22/2021 7.48 19.37 12/9/2022 6.18 20.67 5/30/2019 8.24 19.09 7/22/2021 -- -- 5/30/2019 8.04 18.72 7/22/2021 -- -- 12/9/2022 7.05 19.71 5/30/2019 7.25 19.35 7/22/2021 7.42 19.18 12/9/2022 6.17 20.43 5/30/2019 5.92 19.87 7/22/2021 6.02 19.77 12/9/2022 4.30 21.49 NOTES: 1 Monument elevation was measured on top and center of the monument lid. Survey completed April and May 201 2 Monitoring well MW-4 was decommissioned in September 2022. Ecology = Washington State Department of Ecology; TOC = top of casing MW-6 BLR 738 26.93 26.6 MW-7 BLR 739 26.34 25.79 26.76 MW-42 BLR 740 27.66 27.33 MW-5 BLR 737 27.1 The reference vertical datum is the North American Vertical Datum of 1988 (NAVD88). Table 1: Groundwater Elevations MW-1 BLR 733 26.32 25.9 26 25.61 MW-3 BLR 732 27.1 26.85 MW-2 BLR 734 109693-003 109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportDx cPAHs Gx BTEX VOCs Metals Sample DateA1-NW:1.5 Characterization 1.5 XNear NW corner of Area 1, near contaminated areaA1-SFS:10 Characterization 10 X X XX1Below "South Foundation Support," where gasoline odors observedA1-WFS:10 Characterization 10 X X XBelow "West Foundation Support," where gasoline odors observed9/12/2022 2209-106A1-A1-Bott:12 Confirmation 12 X XArea 1, Grid A1, excavation bottom, strong petroleum odorA1-A1-W:9 Confirmation 9 X XArea 1, Grid A1, west sidewall, strong petroleum odorA1-100:9 Duplicate 9 X X Duplicate of A1-A1-W:9A1-A1-S:9 Confirmation 9 X XArea 1, Grid A1, south sidewall, strong petroleum odorA1-B1-S:9 Confirmation 9 X XArea 1, Grid B1, south sidewall, moderate petroleum odorA1-C1-S:8 Confirmation 8 X XArea 1, Grid C1, south sidewall, slight petroleum odorA1-C2-Bott:12 Confirmation 12 X XArea 1, Grid C2, excavation bottom, slight petroleum odorA1-D1-S:10 Confirmation 10 X XArea 1, Grid D1, south sidewall, no petroleum odor observedA1-101:10 Duplicate 10 X X Duplicate of A1-D1-S:10A1-D1-Bott:12 Confirmation 12 X XArea 1, Grid D1, excavation bottom, no petroleum odor observedA1-A1-stock Characterization -- X X Area 1, Grid A1 Stockpile 9/27/2022 2209-292A1-A2-SW:9 Confirmation 9 X XArea 1, Grid A2, southWEST sidewall, no petroleum odorA1-A2-NW:9Confirmation - OVEREXCAVATED9X XArea 1, Grid A2, northWEST sidewall, strong petroleum odor, see A1-A2-NW2:10A1-102:9 Duplicate 9 X X Duplicate of A1-A2-NW:9A1-A2:Stock Characterization -- X XArea 1, Grid A2 Stockpile, petroleum odorA1-A2-Bott:12 Confirmation 12 X XArea 1, Grid A2 excavation bottom, no petroleum odorA1-C2-E:9 Confirmation 9 X XArea 1, Grid C2, east sidewall, no petroleum odor9/27/2022 2209-2929/30/2022 2209-332Area 1NotesSample DesignationLaboratory Report No.9/9/2022 2209-083Table 2: Soil Sampling SummaryRemediation Area Sample TypeSample Depth (feet bgs) 109693-003 Page 1 of 4109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportDx cPAHs Gx BTEX VOCs Metals Sample DateNotesSample DesignationLaboratory Report No.Table 2: Soil Sampling SummaryRemediation Area Sample TypeSample Depth (feet bgs)A1-D1-N:9 Confirmation 9 X XArea 1, Grid D1, north sidewall, no petroleum odor, organic layerA1-C2-Botta:12 Confirmation 12 X XArea 1, Grid C2 excavation bottom, no petroleum odorA1-C3-E:8 Confirmation 8 X XArea 1, Grid C3, east sidewall, no petroleum odor2210-025A1-C3-N:8 Confirmation 8 X XArea 1, Grid C3, north sidewall, no petroleum odor2210-025A1-103:8 Duplicate 8 X X Duplicate of A1-C3-N:8 2210-025A1-B3-Bott:11 Confirmation 11 X XArea 1, Grid B3, excavation bottom, no petroleum odor2210-025A1-A3-Bott:11 Confirmation 11 X XArea 1, Grid A3, excavation bottom, no petroleum odor2210-025A1-A3-W:8 Confirmation 8 X X Area 1, Grid A3, west, no petroleum odor 2210-025A1-B4-E:9 Confirmation 9 X XArea 1, Grid B4, east sidewall, no petroleum odorA1-A4-Bott:11.5Confirmation - OVEREXCAVATED11.5 X XArea 1, Grid A4, excavation bottom, slight petroleum odor, see A1-A4-Bott:12.5A1-A4-N:8 Confirmation 8 X XArea 1, Grid A4, north sidewall, no petroleum odorA1-A4-NW:7 Confirmation 7 X XArea 1, Grid A4, north sidewall, no petroleum odor, below metal pipeA1-A4-W:8Confirmation - OVEREXCAVATED8X XArea 1, Grid A4, west sidewall, petroleum odor, black sand, see A1-A4-W2:9A1-A2-W:8Confirmation - OVEREXCAVATED8X XArea 1, Grid A2, west sidewall, petroleum odor, black sand, see A1-A2-SW2:9A1-104:11.5 Duplicate 11.5 X X Duplicate of A1-A4-Bott:11.5HA-3:Ex-Bot Excavation Bottom 10 X Beneath Hoist - petroleum odor 10/31/2022 2211-004A1-HA-2:8 Confirmation 8 X Beneath Hoist 11/1/2022 2211-013A1-HB-5:6 Confirmation 6 X Beneath HoistA1-HC-3:5 Confirmation 5 X Beneath HoistA1-HB-3:8 Excavation Bottom 8 X Beneath Hoist - petroleum odor10/3/202210/5/2022 2210-03611/2/2022 2211-0269/30/2023 (cont)2209-332 (cont)Area 1(cont) 109693-003 Page 2 of 4109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportDx cPAHs Gx BTEX VOCs Metals Sample DateNotesSample DesignationLaboratory Report No.Table 2: Soil Sampling SummaryRemediation Area Sample TypeSample Depth (feet bgs)A1-HB-4:8 Characterization 8 X Beneath HoistA1-HB-4:9 Confirmation 9 X Beneath HoistA1-HB-6:8 Characterization 8 X Beneath HoistA1-HB-6:9 Excavation Bottom 9 X Beneath Hoist - petroleum odorA1-HB-2:9 Characterization 9 X Beneath HoistA1-HB-2:10 Excavation Bottom 10 X Beneath Hoist - petroleum odorA1-HC-1:9 Characterization 9 X Beneath HoistA1-HC-1:10 Excavation Bottom 10 X Beneath Hoist - petroleum odorA1-A4-BOTT:12.5 Confirmation 12.5 XArea 1, Grid A4, excavation bottom, sample taken after additional excavationA1-A4-W2:9 Confirmation 9 XArea 1, Grid A4, West sidewall, sample taken after additional excavationA1-A2-NW2:10 Confirmation 10 XArea 1. Grid A2, Northwest Sidewall, sample taken after additional excavationA1-A2-SW2:9 Confirmation 9 XArea 1, Grid A2, Southwest Sidewall, sample taken after additional excavationA3-NW:5 Confirmation 5 X North SidewallA3-EW:6 Confirmation 6 X East SidewallA3-SW:5 Confirmation 5 XSouth Sidewall, Below Encountered Storm DrainA3-WW:6 Confirmation 6 X West SidewallA3-Bot:8 Confirmation 8 X Excavation BottomA4-NW:3 Confirmation 3 X X North SidewallA4-EW:3.5 Confirmation 3.5 X X East SidewallA4-SW:3 Confirmation 3 X X South SidewallA4-WW:3.5 Confirmation 3.5 X X West SidewallA4-Bot:8 Confirmation 8 X X Excavation BottomA5-SW:5 Confirmation 5 X South SidewallA5-SWD:5 Duplicate 5 X South Sidewall (Duplicate)A5-NW:5 Confirmation 5 X North SidewallA5-EW:5 Confirmation 5 X East SidewallA5-WW:5.5 Confirmation 5.5 X West SidewallA5-Bot:8 Confirmation 8 X Excavation Bottom8/29/2022 2208-3138/30/2022 2208-3329/20/2022 2209-18311/3/2022 2211-04211/8/2022 2211-11211/9/2022 2211-141Area 1(cont)Area 3Area 4Area 5 109693-003 Page 3 of 4109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportDx cPAHs Gx BTEX VOCs Metals Sample DateNotesSample DesignationLaboratory Report No.Table 2: Soil Sampling SummaryRemediation Area Sample TypeSample Depth (feet bgs)Area 5(cont)A5-stockpile Characterization --X Area 5 Stockpile 9/27/2022 2209-292NOTES:1 Model Toxics Control Act (MTCA) Metals (arsenic, cadmium, chromium, lead, and mercury)BTEX = benzene, toluene, ethylbenzene, and xylenes; bgs = below ground surface; cPAHs = carcinogenic polyaromatic hydrocarbons; Dx = Northwest Total Petroleum Hydrocarbons as Diesel Extended (NWTPH-Dx); Gx = Northwest Total Petroleum Hydrocarbons as Gasoline; VOCs = volatile organic compounds; X = selected analysis 109693-003 Page 4 of 4109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Remedial Action Report Gasoline Diesel Lube Oil Confirmation Samples A1-A1-Bott:12 < 14 < 44 < 89 A1-A1-W:9 < 17 < 110 1,200 Duplicate Sample (A1-100:9) < 11 < 97 1,100 A1-A1-S:9 < 6.9 < 34 < 67 A1-B1-S:9 < 9.5 < 39 < 77 A1-C1-S:8 < 8.1 < 35 < 71 A1-C2-Bott:12 < 7.4 < 35 < 70 A1-D1-S:10 < 7.4 < 34 < 69 Duplicate Sample (A1-101:10) < 6.6 39 < 64 A1-D1-Bott:12 < 14 < 47 < 93 A1-A2-SW:9 < 7.7 < 34 < 68 A1-A2-NW:9 < 53 2,700 11,000 Duplicate Sample (A1-102:9) < 77 3,400 14,000 A1-A2-Bott:12 < 8.8 < 38 < 76 A1-C2-E:9 < 11 < 41 < 82 A1-D1-N:9 < 6.8 < 32 < 64 A1-C2-Botta:12 < 12 < 41 < 83 A1-C3-E:8 < 11 < 41 < 82 A1-C3-N:8 < 8.1 < 34 76 A1-B3-Bott:11 < 10 < 41 < 82 A1-A3-Bott:11 < 12 58 660 A1-A3-W:8 < 8.1 < 33 < 66 Duplicate Sample (A1-103:8) < 7.5 < 32 < 64 A1-B4-E:9 < 6.3 < 32 < 63 A1-A4-Bott:11.5 39 < 950 7,400 A1-A4-N:8 < 4.8 < 29 89 A1-A4-NW:7 < 9.4 < 27 < 55 A1-A4-W:8 < 41 2,700 17,000 A1-A2-W:8 < 51 4,500 21,000 Duplicate Sample (A1-104:11.5)80 < 890 6,700 Table 3: Remediation Area 1 Confirmation Sample Analytical Results Sample Designation Total Petroleum Hydrocarbons 109693-003 Page 1 of 2 109693-003-R1f-Tables - 2/8/2024/wp/lkn/ Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Remedial Action Report Gasoline Diesel Lube Oil Table 3: Remediation Area 1 Confirmation Sample Analytical Results Sample Designation Total Petroleum Hydrocarbons A1-A4-BOTT:12.5 -- < 36 < 72 A1-A4-W2:9 -- < 35 < 71 A1-A2-NW2:10 -- < 30 < 59 A1-A2-SW2:9 -- < 30 < 60 MTCA Method A Cleanup Level 100!2000 2000 NOTES: 1 Cleanup level with benzene is absent. Bold text indicates detected analyte. Data are reported in milligrams per kilogram. Shaded cells indicates detection exceeding MTCA Method A criteria. < = not detected above indicated reporting limit.; MTCA = Model Toxics Control Act 109693-003 Page 2 of 2 109693-003-R1f-Tables - 2/8/2024/wp/lkn/ Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportGasoline Diesel Lube Oil Benzene TolueneEthyl-benzenem,p-Xylene o-Xylene Acetone2-Butanone (methyl ethyl ketone)Chloro-benzeneIsopropyl-benzene (cumene)1,2,4-Trimethyl benzenesec-Butyl benzenep-Isopropyl toluene1,2-Dichloro benzenen-Butyl benzene Arsenic Cadmium Chromium Lead MercuryCharacterization SamplesA1-NW:1.5 --< 1,200 7,100-- -- -- -- -- -- -- -- -- -- -- -- -- --A1-SFS:10150 2,800 12,000< 0.0012 < 0.00580.0012 0.010 0.0084 0.074 0.011 0.0014 0.0038 0.12 0.068 0.11 0.18 0.23< 12 < 0.6216< 6.2 < 0.31A1-WFS:1013< 4604,500< 0.00077 < 0.0039 < 0.000770.0065 0.011-- -- -- -- -- -- -- -- -- -- -- -- -- --A1-A1-stock < 6.5 < 34 < 68 -- -- -- -- -- -- -- -- -- -- -- -- -- --A1-A2:Stock < 481,100 5,800-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --MTCA Method A Cleanup Level100!2000 2000 0.03 7 6 2.1 1.4 0.051 0.79 0.072 1.3 -- 0.40 0.71 20 2 2000 250 2NOTES:1 Cleanup level with benzene is absent.Bold text indicates detected analyte.Data are reported in milligrams per kilogram.Shaded cells indicates detection exceeding MTCA Method A criteria. < = not detected above indicated reporting limit.; MTCA = Model Toxics Control Act 9Total Petroleum HydrocarbonsVolatile Organic Compounds Table 4: Remediation Area 1 Characterization Sample Analytical ResultsSampleDesignationMetals 109693-003109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Remedial Action Report Diesel Lube Oil A3-NW:5 < 37 < 75 A3-EW:6 < 38 < 76 A3-SW:5 < 45 100 A3-WW:6 < 34 < 67 A3-Bot:8 < 37 < 74 A5-SW:5 < 27 < 54 Duplicate Sample (A5-SWD:5) < 30 110 A5-NW:5 < 27 < 54 A5-EW:5 < 30 72 A5-WW:5.5 < 34 < 68 A5-Bot:8 < 38 < 75 Characterization Samples A5-stockpile < 32 < 63 2000 2000 NOTES: Bold text indicates detected analyte. MTCA = Model Toxics Control Act Area 3 Area 5 Table 5: Remediation Areas 3 and 5 Sample Analytical Results Remediation Area Sample Designation Total Petroleum Hydrocarbons (mg/kg) MTCA Method A Cleanup Level < = not detected above indicated reporting limit.; mg/kg = milligrams per kilogram; 109693-003 109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportSample Number: A4-NW:3 A4-EW:3.5 A4-SW:3 A4-WW:3.5 A4-Bot:8Sample Depth: 3 3.5 3 3.5 8Sample Date: 8/30/2022 8/30/2022 8/30/2022 8/30/2022 8/30/2022Diesel-range < 30 < 31 < 37 < 30 < 29 2000Lube oil-range99 200 150 83< 58 2000Naphthalene < 0.00810.028 0.055< 0.0079 < 0.0077 52-Methylnaphthalene < 0.00810.032 0.064< 0.0079 < 0.0077 51-Methylnaphthalene < 0.00810.025 0.046< 0.0079 < 0.0077 5Acenaphthylene < 0.0081 < 0.0082 < 0.0099 < 0.0079 < 0.0077 NEAcenaphthene < 0.0081 < 0.0082 < 0.0099 < 0.0079 < 0.0077 NEFluorene < 0.00810.0087< 0.0099 < 0.0079 < 0.0077 NEPhenanthrene0.010 0.047 0.065 0.013< 0.0077 NEAnthracene < 0.0081 < 0.0082 < 0.0099 < 0.0079 < 0.0077 NEFluoranthene 0.015 0.032 0.034 0.016< 0.0077 NEPyrene0.015 0.032 0.033 0.016< 0.0077 NEBenzo[g,h,i]perylene < 0.00810.017 0.022 0.010< 0.0077 NEbenzo(a)pyrene0.0089 0.017 0.014 0.013< 0.0077 0.1benzo(a)anthracene < 0.00810.016 0.012 0.0084< 0.0077 NEbenzo(b)fluoranthene0.011 0.035 0.033 0.013< 0.0077 NEbenzo(k)fluoranthene < 0.0081 < 0.0082 < 0.0099 < 0.0079 < 0.0077 NEchrysene0.0084 0.028 0.029 0.011< 0.0077 NEdibenzo[a,h]anthracene < 0.0081 < 0.0082 < 0.0099 < 0.0079 < 0.0077 NEindeno[1,2,3-cd]pyrene < 0.00810.016 0.018 0.0082< 0.0077 NETotal cPAH TEQ (see Table 4)0.012 0.025 0.022 0.017-- 0.1NOTES:Bold text indicates detected analyte. Carcinogenic Polycyclic Aromatic Hydrocarbons (mg/kg)Polycyclic Aromatic Hydrocarbons (mg/kg)MTCA Method A Criteria< =not detected above indicated reporting limit; cPAH = carcinogenic polycyclic aromatic hydrocarbon; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act; NE = not established; TEQ = toxic equivalent concentrationTable 6: Remediation Area 4 Confirmation Sample Analytical ResultsPetroleum Hyydrocarbons (mg/kg) 109693-003109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportAnalyteResult(mg/kg)Method Detection Limit (mg/kg)Toxicity Equivalency FactorAdjusted Concentration1 (mg/kg)Benzo(a)pyrene0.00890.0081 1 0.0089Benzo(a)anthracene ND 0.0081 0.1 0.000405Benzo(b)fluoranthene0.0110.0081 0.1 0.0011Benzo(k)fluoranthene ND 0.0081 0.1 0.000405Chrysene0.00840.0081 0.01 0.000084Dibenzo[a,h]anthracene ND 0.0081 0.1 0.000405Indeno[1,2,3-cd]pyrene ND 0.0081 0.1 0.000405Total cPAH TEQ20.0120.10AnalyteResult(mg/kg)Method Detection Limit (mg/kg)Toxicity Equivalency FactorAdjusted Concentration1 (mg/kg)Benzo(a)pyrene0.0170.0082 1 0.017Benzo(a)anthracene0.0160.0082 0.1 0.0016Benzo(b)fluoranthene0.0350.0082 0.1 0.0035Benzo(k)fluoranthene ND 0.0082 0.1 0.00041Chrysene0.0280.0082 0.01 0.00028Dibenzo[a,h]anthracene ND 0.0082 0.1 0.00041Indeno[1,2,3-cd]pyrene0.0160.0082 0.1 0.0016Total cPAH TEQ20.0250.10Table 7: Area 4 Toxicity Equivalency Factor-Adjusted Polycyclic Aromatic Hydrocarbon ConcentrationsTotal cPAH TEQ Calculation for Sample A4-NW:3MTCA Method A Cleanup Level for Unrestricted Land UseTotal cPAH TEQ Calculation for Sample A4-EW:3.5MTCA Method A Cleanup Level for Unrestricted Land Use 109693-003 Page 1 of 3109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportTable 7: Area 4 Toxicity Equivalency Factor-Adjusted Polycyclic Aromatic Hydrocarbon ConcentrationsAnalyteResult(mg/kg)Method Detection Limit (mg/kg)Toxicity Equivalency FactorAdjusted Concentration1 (mg/kg)Benzo(a)pyrene0.0140.0099 1 0.014Benzo(a)anthracene0.0120.0099 0.1 0.0012Benzo(b)fluoranthene0.0330.0099 0.1 0.0033Benzo(k)fluoranthene ND 0.0099 0.1 0.000495Chrysene0.0290.0099 0.01 0.00029Dibenzo[a,h]anthracene ND 0.0099 0.1 0.000495Indeno[1,2,3-cd]pyrene0.0180.0099 0.1 0.0018Total cPAH TEQ20.0220.10AnalyteResult(mg/kg)Method Detection Limit (mg/kg)Toxicity Equivalency FactorAdjusted Concentration1 (mg/kg)Benzo(a)pyrene0.0130.0079 1 0.013Benzo(a)anthracene0.00840.0079 0.1 0.00084Benzo(b)fluoranthene0.0130.0079 0.1 0.0013Benzo(k)fluoranthene ND 0.0079 0.1 0.000395Chrysene0.0110.0079 0.01 0.00011Dibenzo[a,h]anthracene ND 0.0079 0.1 0.000395Indeno[1,2,3-cd]pyrene0.00820.0079 0.1 0.00082Total cPAH TEQ20.0170.10Total cPAH TEQ Calculation for Sample A4-SW:3MTCA Method A Cleanup Level for Unrestricted Land UseTotal cPAH TEQ Calculation for Sample A4-WW:3.5MTCA Method A Cleanup Level for Unrestricted Land Use 109693-003 Page 2 of 3109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action ReportTable 7: Area 4 Toxicity Equivalency Factor-Adjusted Polycyclic Aromatic Hydrocarbon ConcentrationsAnalyteResult(mg/kg)Method Detection Limit (mg/kg)Toxicity Equivalency FactorAdjusted Concentration1 (mg/kg)Benzo(a)pyrene ND 0.0077 1 0.00385Benzo(a)anthracene ND 0.0077 0.1 0.000385Benzo(b)fluoranthene ND 0.0077 0.1 0.000385Benzo(k)fluoranthene ND 0.0077 0.1 0.000385Chrysene ND 0.0077 0.01 0.0000385Dibenzo[a,h]anthracene ND 0.0077 0.1 0.000385Indeno[1,2,3-cd]pyrene ND 0.0077 0.1 0.000385Total cPAH TEQ2< 0.0060.10NOTES:2 Sum of the TEF adjusted concentration for each cPAH. Shaded text indicates a concentration exceeding the MTCA cleanup level.cPAH = carcinogenic polycyclic aromatic hydrocarbon; MDL = Method Detection Limit; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act; ND = not detected above the MDL; TEF = toxicity equivalency factor; TEQ = toxic equivalent concentration1 For detected compounds, calculated as the detected concentration multiplied by the compound's TEF. For compounds that are ND, calculated as one-half of the MDL multiplied by the compound's TEF. MTCA Method A Cleanup Level for Unrestricted Land UseTotal cPAH TEQ Calculation for Sample A4-Bot:8 109693-003 Page 3 of 3109693-003-R1f-Tables - 2/8/2024//wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Remedial Action Report Gasoline Diesel Lube Oil Hoist Area Samples A1-HA-2:8 < 8.3 < 34 < 67 HA-3:Ex-Bot < 14 1,900 20,000 A1-HB-2:9 < 7.7 < 300 4,500 A1-HB-2:10 < 16 < 2,500 37,000 A1-HB-3:8 < 11 < 1,400 24,000 A1-HB-4:8 < 7.0 < 32 < 64 A1-HB-4:9 < 10 < 28 < 56 A1-HB-5:6 < 6.0 < 53 540 A1-HB-6:8 < 7.0 < 30 350 A1-HB-6:9 < 26 920 10,000 A1-HC-1:9 < 8.5 < 31 < 63 A1-HC-1:10 < 15 < 790 12,000 A1-HC-3:5 < 6.6 < 31 290 MTCA Method A Cleanup Level 100!2000 2000 NOTES: 1 Cleanup level with benzene absent. Bold text indicates detected analyte. Data are reported in milligrams per kilogram. Shaded cells indicates detection exceeding MTCA Method A criteria. < = not detected above indicated reporting limit.; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act Table 8: Remediation Area 6 Sample Analytical Results Sample Designation Total Petroleum Hydrocarbons 109693-003 109693-003-R1f-Tables - 2/8/2024//wp/lkn 109693Path: P:\GIS\SEA\109000s\109693 SRTC\MXD\SRTC_Mar2023_Vicinity.mxd Author: BRL User: MRH Date: 3/6/2023 0 2,000 Feet Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Sound Transit Renton, WA )HEUXDU\202 Figure 1 Vicinity Map¯ §¨¦405 UV167 UV900 UV515 Renton Project Location Project Location Washington Seattle 109693Path: P:\GIS\SEA\109000s\109693 SRTC\MXD\SRTC_Mar2023_SitePlan.mxd Author: BRL User: MRH Date: 3/7/2023 0200Feet)HEUXDU\Figure 2Site PlanLEGEND!HActive Monitoring Well!HDecommissioned Monitoring WellSite BoundaryST ParcelsFormer HoistsTest PitFormer Oil-Water SeparatorInjection AreaExcavation AreaFormer Buildings¯Notes:1. Site features are approximate.2. Gravel was placed in work areas as final surface restoration.Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Sound TransitRenton, WAUV1UV2RTN001RTN001 Path: P:\GIS\SEA\109000s\109693 SRTC\MXD\SRTC_Jan2023_cdk.mxd Author: BRL User: MRH Date: 3/1/2023 020FeetLEGENDSample Type!(Base#*Sidewall(Overexcavated Base*Overexcavated Sidewall!HActive Monitoring WellExcavation Depth6 feet11-11.5 feet12-12.5 feet¯109693)HEUXDU\Figure 3Area 1 ExcavationNotes:1. Soil sample locations are approximate.2. Sidewalls of excavation were sloped atan approximately 1:1 slope. No shoring was used while excavating Area 1.Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Sound TransitRenton, WA Path: P:\GIS\SEA\109000s\109693 SRTC\MXD\SRTC_Jan2023_cdk.mxd Author: BRL User: MRH Date: 3/6/2023 020FeetLEGENDSample Type!(Base#*Sidewall¯109693)HEUXDU\Figure 4Area 3 ExcavationNotes:1. Final depth of excavation was 8 feet.2. Soil sample locations are approximate.Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Sound TransitRenton, WA Path: P:\GIS\SEA\109000s\109693 SRTC\MXD\SRTC_Jan2023_cdk.mxd Author: BRL User: MRH Date: 3/6/2023 020FeetLEGENDSample Type!(Base#*Sidewall¯109693)HEUXDU\Figure 5Area 4 ExcavationNotes:1. Final depth of excavation was 8 feet.2. Soil sample locations are approximate.Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Sound TransitRenton, WA Path: P:\GIS\SEA\109000s\109693 SRTC\MXD\SRTC_Jan2023_cdk.mxd Author: BRL User: MRH Date: 3/6/2023 020FeetLEGENDSample Type!(Base#*SidewallSite Boundary¯109693)HEUXDU\Figure 6Area 5 ExcavationNotes:1. Final depth of excavation was 8 feet.2. Soil sample locations are approximate.3. A trench box was used to support sidewalls of the excavation.Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Sound TransitRenton, WA Path: P:\GIS\SEA\109000s\109693 SRTC\MXD\SRTC_Jan2023_cdk.mxd Author: BRL User: MRH Date: 3/6/2023 050FeetLEGEND!HDecommissioned Monitoring Well!HActive Monitoring WellFormer HoistsInjection AreaExcavation AreaFormer BuildingsSample Result!(Above CUL!(Below CUL¯109693)HEUXDU\Figure 7Area 6 Hoist Removal LocationsNotes:1. Site features are approximate.2. Area 6 injections were completed following hydraulic hoist removals.Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Sound TransitRenton, WAUV1UV6 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Remedial Action Report 109693-003 February 8, 2024 $-iAPPENDIX A: PREVIOUS STUDIESAppendix A: Previous StudiesAppendix A Previous Studies CONTENTS 2017 Phase I Environmental Site Assessment (Shannon & Wilson) 2017 Phase II Environmental Site Assessment (Shannon & Wilson) 2018 Remedial Cost Estimate (Shannon & Wilson) 2019 Supplemental Environmental Site Assessment (Shannon & Wilson) 2021 Environmental Letter Report (Shannon & Wilson) Phase I Environmental Site Assessment Sound Transit Right-of-Way #RTN001 through RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington December 8, 2017 Submitted To: Mr. Mark Menard Sound Transit 401 South Jackson Street Seattle, Washington 98104 By: Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, Washington 98103 21-1-16700-281 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 i EXECUTIVE SUMMARY Shannon & Wilson has completed a Phase I Environmental Site Assessment for Sound Transit Right-of-Way Numbers RTN001 through RTN004, located at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington (the subject property). RTN001 consists of a showroom and shop building. Sound Ford uses the shop building for auto detailing. RTN002 consists of an auto body shop operated by Sound Ford using the name Sound Collision Center. RTN003 consists of a car sales office, two service garages, and an auto parts office and is occupied by Walker’s Renton Mazda. RTN004 currently is vacant land. This study was conducted with the understanding that Sound Transit plans to acquire the parcels as part of the Interstate Highway 405 (I-405) Bus Rapid Transit project. The research conducted for this assessment indicates that the subject property was first developed with a railroad line and an electric passenger railway line in the early part of the 20th Century. From the 1940s to mid-1960s, a barn and a “cycle shop” were present, as well as a possible fruit stand and residences that may have been located offsite. From 1968 to the present, the subject property has been occupied by auto dealerships, including service shops and a body shop. Associated facilities have included underground storage tanks (USTs), aboveground storage tanks (ASTs), sub-floor hydraulic hoists, floor drains, trench drains, oil/water separators, alignment pits, and paint spray booths. Products used and stored at the subject property have included heating oil, gasoline, fresh and used motor oil, automatic transmission fluid, hydraulic oil, paints, and chlorinated and non-chlorinated solvents. The surrounding area was generally rural until the mid-1960s and has been dominated by development of auto-related businesses since that time, including auto dealerships and service stations. In our opinion, this assessment revealed the presence of the following recognized environmental conditions for the subject property: The long history of auto repair activities on RTN001 and RTN003 and auto body shop activities on RTN002 represent potential sources of localized subsurface contamination from petroleum hydrocarbons and chlorinated and non-chlorinated solvents near and beneath the onsite buildings. Documentation regarding the 1989 removal of USTs at the subject property (RTN001 and RTN002) is incomplete and contamination may remain present at the known locations of former USTs. The dispenser pad associated with the former gasoline UST on RTN001 was not removed, and subsurface conditions under the dispenser pad have not been not assessed. In addition, given that not all of the former USTs EXECUTIVE SUMMARY (cont.) 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 ii were initially inventoried, it is possible that unknown USTs remain present on the subject property. There is no documentation regarding the 1996/1997 removal of some of the sub-floor hydraulic hoists and associated soils from the buildings on RTN001 and RTN002. Soil contamination was reportedly identified at some of the hoist locations. All sub-floor hoist locations represent potential sources of subsurface contamination from hydraulic oil and possibly polychlorinated biphenyls. The hoist vaults also represent potential conduits for contaminants from products used in those areas to enter the subsurface. Current and former floor drains, trench drains, oil/water separators, and alignment pits on RTN001 and/or RTN002 represent potential conduits for subsurface contamination from products used in those areas. Numerous containers in the service shop on RTN001 may contain unknown substances that need to be characterized and properly disposed of. The former outdoor drum storage area east of the body shop (RTN002) was used to store waste paint thinner that was transferred from smaller containers to drums in that area. This area represents a potential source of subsurface contamination from chlorinated and non-chlorinated solvents. Discarded items in the crawlspace under the used car building on RTN003 may include items that contain or have released petroleum products or hazardous substances. Releases of waste oil have occurred in the area under and around the waste oil AST located outside the Walker’s Renton Mazda building on RTN003. The AST represents a potential source of subsurface hydrocarbon and solvent contamination. The former rail line that extended through RTN003 is a potential source of contamination from drips and leaks of fuel and lubricants from engines and rail cars, spills of petroleum products and other hazardous substances transported through the subject property, wood preservatives used on railroad ties, and herbicides used for weed control. The former electric railway line along the southern edge of RTN004 represents a potential source of contamination from wood preservatives and herbicides. A Chevron station adjacent to the south of the subject property (across S. Grady Way) has had known groundwater contamination approximately 100 feet south of the subject property for at least the past 20 years. The groundwater flow direction has been inconsistent but has at times included a northeasterly component. Therefore, the Chevron site represents a potential source of contamination at the subject property from petroleum hydrocarbons and benzene, toluene, ethylbenzene, and xylenes. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 iii TABLE OF CONTENTS Page EXECUTIVE SUMMARY .............................................................................................................I 1.0 INTRODUCTION..................................................................................................................1 1.1 Purpose.......................................................................................................................1 1.2 Scope of Services.......................................................................................................2 1.3 Roles...........................................................................................................................3 2.0 BACKGROUND....................................................................................................................3 3.0 GEOLOGIC AND HYDROGEOLOGIC SETTING.............................................................4 3.1 Regional and Site Geologic Setting ...........................................................................4 3.2 Regional and Site Groundwater .................................................................................6 4.0 SUBJECT PROPERTY AND VICINITY HISTORY...........................................................6 4.1 Subject Property.........................................................................................................7 4.1.1 RTN001........................................................................................................8 4.1.2 RTN002......................................................................................................10 4.1.3 RTN003......................................................................................................11 4.1.4 RTN004......................................................................................................11 4.2 Adjacent Site History...............................................................................................12 4.2.1 Adjacent Properties to the North................................................................12 4.2.2 Adjacent Properties to the Northeast and East...........................................12 4.2.3 Adjacent Properties to the South................................................................12 4.2.4 Adjacent Properties to the Southwest........................................................12 4.2.5 Adjacent Properties to the West.................................................................12 5.0 RESULTS OF FIELD RECONNAISSANCE.....................................................................13 5.1 Subject Property.......................................................................................................13 5.1.1 RTN001......................................................................................................14 5.1.1.1 Exterior Areas ...........................................................................14 5.1.1.2 Interior Areas ............................................................................15 5.1.2 RTN002......................................................................................................17 5.1.2.1 Exterior......................................................................................17 5.1.2.2 Interior.......................................................................................18 5.1.3 RTN003......................................................................................................19 5.1.3.1 Used Car Building – Exterior....................................................19 5.1.3.2 Used Car Building – Interior.....................................................19 5.1.3.3 Walker’s Renton Mazda Building – Exterior............................20 5.1.3.4 Walker’s Renton Mazda Building – Interior.............................20 5.1.4 RTN004......................................................................................................20 5.2 Adjacent Properties..................................................................................................21 TABLE OF CONTENTS (cont.) Page 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 iv 6.0 RESULTS OF ENVIRONMENTAL RECORDS REVIEW...............................................21 6.1 Environmental Data Resources, Inc. (EDR) Report Review...................................22 6.2 Washington State Department of Ecology (Ecology) File Review..........................22 6.2.1 Sound Ford, 750 Rainier Avenue S. ..........................................................23 6.2.1.1 Dangerous Waste Records........................................................23 6.2.1.2 Underground Storage Tank (UST) Records..............................24 6.2.2 Walker’s Renton Mitsubishi/Mazda, 200 S. Grady Way ..........................27 6.2.3 Renton Subaru Peugeot/Walker’s Renton Subaru, 720 Rainier Avenue S. ....................................................................................................................28 6.2.4 USA Petroleum/Mobil #68406, 765 Rainier Avenue S.............................28 6.2.5 Grady Way Chevron, 301 S. Grady Way ..................................................29 6.2.6 Renton Lincoln-Mercury, 201 S. 7 th Street................................................30 7.0 PREVIOUS ENVIRONMENTAL REPORT REVIEW......................................................30 8.0 INTERVIEWS .....................................................................................................................30 8.1 Site Representative Interview...................................................................................30 8.2 User-Provided Information ......................................................................................31 9.0 DATA GAPS........................................................................................................................31 10.0 SUMMARY OF FINDINGS AND CONCLUSIONS.........................................................31 10.1 Subject Property.......................................................................................................32 10.2 Adjacent Property (Chevron Service Station, 301 S. Grady Way)..........................33 11.0 LIMITATIONS, UNCERTAINTY, AND RISK.................................................................33 12.0 CERTIFICATIONS, SIGNATURES, AND CREDENTIALS............................................35 13.0 REFERENCES.....................................................................................................................36 TABLE 1 Listed Sites with Potential to Impact Subject Property (3 pages) TABLE OF CONTENTS (cont.) 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 v FIGURES 1 Vicinity Map 2 Site and Adjoining Properties Map 3 Site Map – RTN001 4 Site Map – RTN002 5 Site Map – RTN003 and RTN004 APPENDICES A Selected Historical Resources (on compact disc) B Site Photographs C Site Inspection Checklist D Environmental Data Resources, Inc. Report (on compact disc located in Appendix A) E Washington State Department of Ecology File Documents (on compact disc located in Appendix A) F User-Provided Information G Previous Assessment Report (on compact disc located in Appendix A) H Important Information About Your Environmental Site Assessment/Evaluation Report 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 1 PHASE IENVIRONMENTAL SITE ASSESSMENT SOUND TRANSIT RIGHT-OF-WAY #RTN001 THROUGH RTN004 SOUND FORD PROPERTY 750 RAINIER AVENUE S.AND 200S.GRADY WAY RENTON,WASHINGTON 1.0 INTRODUCTION Shannon & Wilson has completed a Phase I Environmental Site Assessment (ESA) for Sound Transit Right-of-Way Numbers RTN001 through RTN004 located at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington (the subject property). The work was conducted in accordance with our proposal dated September 19, 2017, under Sound Transit contract #RTA/AE 0107-14C, Task Order 29. The task order was authorized by Mr. Kevin Workman and Notice to Proceed was provided on October 4, 2017. This study was conducted to assist Sound Transit’s plans to acquire the parcels as part of the Interstate Highway 405 (I-405) Bus Rapid Transit project. 1.1 Purpose The purpose of this Phase I ESA is to identify, to the extent feasible pursuant to the process described in the ASTM International (ASTM) Practice E1527-13 (Phase I ASTM standard [ASTM, 2013]),recognized environmental conditions (RECs),controlled RECs (CRECs), or historical RECs (HRECs) associated with the subject property. The term REC means: The presence or likely presence of hazardous substances or petroleum products in, on, or at a property: (a) due to a release to the environment, (b) under conditions indicative of a release to the environment, or (c) under conditions that pose a material threat of a future release to the environment. The term CREC means: A REC resulting from a past release of hazardous substances or petroleum products that has been addressed to the satisfaction of the applicable regulatory authority (for example, as evidenced by the issuance of a no further action letter or equivalent, or meeting risk-based criteria established by regulatory authority), with hazardous substances or petroleum products allowed to remain in place subject to the implementation of required controls (for example, property use restrictions, activity and use limitations, institutional controls, or engineering controls). 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 2 The term HREC means: A past release of any hazardous substances or petroleum products that has occurred in connection with the property and has been addressed to the satisfaction of the applicable regulatory authority or meeting unrestricted use criteria established by a regulatory authority, without subjecting the property to any required controls. The terms REC and CREC are not intended to include de minimis conditions that generally do not present a threat to human health or the environment and that generally would not be the subject of an enforcement action if brought to the attention of appropriate governmental agencies. Conditions determined to be de minimis are not RECs or CRECs. The U.S. Environmental Protection Agency (EPA) has determined that the Phase I ASTM standard (E1527-13) (ASTM, 2013) is consistent with and meets the requirements for performing All Appropriate Inquiry (AAI) and may be used to comply with federal AAI regulations at 40 Code of Federal Regulations (CFR) Part 312. Washington State Model Toxics Control Act (MTCA) (Washington State Department of Ecology [Ecology], 2013) and Dangerous Waste Regulations define hazardous or dangerous wastes and/or substances, and contain information regarding discovery and reporting. State regulations were considered within the process of performing this Phase I ESA. 1.2 Scope of Services The scope of services included the following subtasks: Review of readily available information with respect to current uses of the property and its surroundings. Review of readily available information from various sources, including city directories, historical maps, and aerial photographs, with respect to the historical uses of the property and its surroundings. Review of state and federal databases of known and suspected contaminated sites. Visual reconnaissance of the property and cursory reconnaissance of the immediate site vicinity. Review of information related to the physical setting of the site. Interview individuals knowledgeable about the site. Preparation of this report. The scope of this project does not include an evaluation of all environmental considerations that may be relevant to a particular transaction, such as testing for radon and mold, or evaluation of 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 3 indoor air quality, potential wetlands, regulatory compliance, and health/safety matters. It also does not include any sampling or testing of air, soil, water, or building materials. 1.3 Roles To complete this Phase I ESA, we utilized the following members: Ms. Dion Valdez (Environmental Scientist, Constellation Services) collected data, completed the site visit, and authored the report. Mr. Ryan Peterson (Environmental Engineer, Shannon & Wilson) completed the site visit and prepared photographic documentation of the site. Ms. Agnes Tirao (Associate/Project Manager, Shannon & Wilson) completed review of technical content, reviewed for programmatic consistency, and compiled the report for production. Ms. Meg Strong (Vice President, Shannon & Wilson) completed quality assurance review of the report. 2.0 BACKGROUND The subject property is located in the northwest quarter of the northeast quarter of Section 19, Township 23 North, Range 5 East of the Willamette Meridian (Figure 1). The parcels that constitute the subject property are shown in Figure 2 and identified and described as follows: RTN001: 750 Rainier Avenue S., King County tax parcel #192305-9035, consisting of 3.43 acres occupied by a 46,980-square-foot auto showroom and shop building. The showroom portion of the building is vacant and the shop area is used by Sound Ford for auto detailing. RTN002: 750 Rainier Avenue S., King County tax parcel #192305-9063, which consists of 1.98 acres occupied by a 12,260-square-foot auto body shop operated by Sound Ford under the name Sound Collision Center. In addition, three towers for power transmission lines are located in the eastern portion of the site. RTN003: 200 S. Grady Way, King County tax parcel #192305-9068, consisting of 1.89 acres occupied by a 3,710-square-foot used car sales office and service garage at the western end of the parcel (which is currently vacant) and a 6,360-square-foot auto parts office and service garage at the eastern end (leased and occupied by Walker’s Renton Mazda). RTN004: 200 S. Grady Way, King County tax parcel #192305-9074, which consists of 0.99 acres of vacant land. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 4 The site vicinity is shown in Figure 1 and a map of the subject property and adjoining properties is presented in Figure 2. Figures 3 through 5 show selected features of each of the four parcels of the subject property. According to information in a title report provided by Sound Transit, the land on RTN001 is owned by Vicki M. Diambri. RTN002, RTN003, and RTN004 are owned by S. Properties, LLC, which also owns the buildings, structures, and improvements on RTN001. The subject property is adjoined by the following land uses: To the north are two auto dealerships (Walker’s Renton Mazda and Car Pros Hyundai Renton). To the east is the South Renton Park & Ride parking lot. To the south, across S. Grady Way, is a Red Lion hotel, a Chevron service station, and a bank. To the southwest, diagonally across the intersection of S. Grady Way and Rainier Avenue S., is the current Sound Ford dealership. To the west, across Rainier Avenue S., is Car Pros Kia dealership, an auto glass shop, a Mobil service station, a Walmart parking lot, and a restaurant. The subject property is in a commercial area of Renton located on the south side of the City’s downtown business district. Contours on the U.S. Geological Survey topographic map for the Renton Quadrangle indicate that the ground surface elevation in the vicinity is approximately 25 feet above the North American Vertical Datum of 1988 (Environmental Data Resources, Inc. [EDR], 2017a). Land surface at the subject property slopes downward a few feet from south to north. In the surrounding area, the land surface drops down abruptly several feet at the eastern edge of the site and just beyond the western boundary, across Rainier Avenue S.; the remainder of the surrounding area is essentially flat. 3.0 GEOLOGIC AND HYDROGEOLOGIC SETTING This section describes the general geologic setting of the site vicinity and discusses the subsurface conditions beneath the subject property and surrounding area as they relate to the potential for contamination to migrate through the soils and groundwater. 3.1 Regional and Site Geologic Setting The subject property is located in the Puget Sound Lowland, which is a topographic depression bounded by the Cascade Mountains to the east and the Olympic Mountains to the west. It is 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 5 typically characterized by deep bedrock (over 1,000 feet) and complicated, thick sequences of sediments deposited by repeated glaciations that moved back and forth across the region over 10,000 years ago. The subject property lies within an approximately 1-mile-wide valley that is the former floodplain of the Black River. The Black River previously received discharge from the Cedar River and Lake Washington, and flowed westward to join the Green River and discharge into the Duwamish River (HistoryLink, 2017). The Cedar River was channelized and diverted into Lake Washington in 1912, and flow to the Black River ceased in 1916 when the discharge from Lake Washington was rerouted to the north through the newly constructed Lake Washington Ship Canal. A geologic map of the Renton Quadrangle indicates that the site vicinity is underlain by alluvium, consisting primarily of sand and gravel, with thin beds of silt, clay, and peat in some areas (Mullineaux, 1965). Reports of two geotechnical engineering studies completed at the subject property were obtained from City of Renton records (Appendix A). A 1986 study included drilling of one soil boring and excavating one test pit (Associated Earth Sciences, Inc. [AESI], 1986). A 1999 geotechnical study included drilling of four soil borings (Creative Engineering Options Inc. [CEO], 1999). The 1986 geotechnical study was conducted in the location of the eastern building on RTN003 prior to its construction (Figure 5). Exploration pit EP-1 was advanced to a depth approximately 12 feet below ground surface (bgs) and boring EB-1 was advanced to a depth of approximately 38 feet bgs. Subsurface materials encountered at these locations consisted of approximately 2 to 3 feet of dense sand and gravel fill. The text of the report notes that the fill included minor amounts of rubble and unspecified debris, which are not indicated on the exploration logs. At EB-1, the fill was underlain by layers of soft silt and peat with thin beds of fine to medium sand. At EP-1, the fill was underlain by soft, slightly sandy, clayey silt with lenses of loose, wet, fine sand. The 1999 geotechnical study included drilling of four soil borings (B-1 through B-4) on RTN001 and RTN002 to depths of approximately 46.5 feet bgs (Figures 3 and 4). In general, the borings encountered approximately 2.5 to 4 feet of sand and gravel fill. At one location (B-1), the fill included pieces of broken concrete. The fill was underlain by interlayered very soft to soft silts and loose to medium dense silty sands and clean sands. Occasional pockets or lenses of peat were encountered. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 6 3.2 Regional and Site Groundwater Information regarding groundwater depth and flow direction for the subject property and immediate vicinity was obtained from reports of geotechnical studies at the subject property (AESI, 1986; CEO, 1999; Appendix A) and from reports in Ecology files for nearby sites (Appendix E). During the 1986 geotechnical study at the subject property, groundwater was encountered at approximately 38 feet bgs in the borehole of EB-1 and at approximately 11 feet bgs in the test pit EP-1 (AESI, 1986). During the 1999 geotechnical study at the subject property, groundwater was measured in each of the four soil borings upon completion of drilling (CEO, 1999). The depths to groundwater ranged from approximately 9 to 15 feet bgs. The direction of groundwater flow was not determined during these studies. Information regarding groundwater flow directions in the immediate vicinity was obtained from review of information in Ecology files for nearby sites (Appendix E). At the adjacent Mobil service station to the west, groundwater monitoring data indicates that the predominant direction of shallow groundwater flow is toward the south-southwest. At the Chevron service station to the south of the subject property, the groundwater flow direction has been less consistent, varying from northeast to southeast in the past, and more recently indicating flow toward the south. At the Renton 1 site located approximately 700 feet to the north, the groundwater flow direction has been determined to be toward the south. Based on the flat topography and the locations of the Cedar River to the east and the Green River to the west, the direction of groundwater flow in the subject property is difficult to estimate and may fluctuate in response to precipitation and other factors, including variability of subsurface lithology due to former meandering of the Black River, subsurface utilities, fill, and buried structures. However, based on the information from Ecology files for nearby sites, it appears that the subject property may be situated on or near a groundwater divide and shallow groundwater beneath the subject property is inferred to flow generally toward the southwest and southeast. 4.0 SUBJECT PROPERTY AND VICINITY HISTORY The history of land use for the subject property was evaluated to identify past uses that might have had adverse effects on the environmental conditions of the property, primarily through the use of petroleum products and potentially hazardous substances. The historical information was obtained by reviewing readily available data from public agencies and commercial services. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 7 The following site history is based on a compilation of information obtained from the following resources: Historical topographic maps obtained from EDR (1897, 1900, 1949, 1968, 1973, 1983, 1994, and 2014) (EDR, 2017a). Sanborn Fire Insurance Maps were researched by EDR; however, no maps were found for the subject property (EDR, 2017b). Aerial photographs obtained from EDR (1936, 1943, 1965, 1968, 1977, 1980, 1985, 1990, 1991, 2006, 2009, and 2011) (EDR, 2017c). Kroll maps reviewed at the Puget Sound Regional Archives in Bellevue, Washington (c. 1940s to c. 1970s). Due to copyright restrictions, copies of the Kroll maps are not included in this report. City directories obtained from EDR (1964, 1969, 1975, 1982, 1987, 1992, 1995, 1999, 2003, 2008, and 2013) (EDR, 2017e). Historical assessor records obtained from the Puget Sound Regional Archives in Bellevue, Washington (1944 to 2001), and current parcel information and assessor records obtained from the King County interactive mapping (iMap) system (King County iMap, 2017). Building, land use, and fire department records obtained from the City of Renton (1968 through 2017). Information provided by Mr. Rich Snyder, President of Sound Ford (Snyder, 2017), and Mr. Leo Vickers, Parts Manager for Sound Ford (Vickers, 2017). Information contained in a previous Phase I ESA report of portions of the subject property (Golder Applied Technologies, 1997). Copies of selected historical resources are provided in Appendix A. The approximate locations of selected historical features are indicated on Figures 3 through 5; however, due to incomplete or conflicting information contained in historical records, the locations or details of some features could not be determined with certainty and were estimated. 4.1 Subject Property The earliest historical records obtained for the subject property are topographic maps dated 1897 and 1900, which show no structures on the subject property. Aerial photographs taken in 1936 and 1943, and a 1949 topographic map, show a Northern Pacific railroad line extending along the length of RTN003; no other structures are apparent on the subject property. The 1936 aerial photograph also shows a cleared strip along the southern boundary line of RTN004, which is indicated on a c. 1940s Kroll map as the Puget Sound Electric Railway right-of-way. A natural 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 8 drainage channel is also visible along the western edge of RTN001 on the 1936 aerial photograph. Beginning with the 1965 aerial photograph, structures appear on the subject property. The development of each parcel from that time to the present is discussed in the following sections. 4.1.1 RTN001 The 1965 air photo shows multiple structures on RTN001. Assessor records indicate that structures on parcel -9035 (RTN001) from the late 1940s to the 1960s included the following: A residence constructed in 1949 and heated by electric wall units (moved offsite, year not noted) A barn (construction date not noted) Three single-family residences moved to the parcel in 1956 and heated by gas wall furnaces (moved offsite in approximately 1965) A duplex residence, apparently moved to the parcel in approximately 1956 and heated by stoves (moved offsite in 1959 or 1961) A fruit stand constructed in 1959 and heated by a stove (torn down by 1969) Some of these structures may have been located north of RTN001, as that area was originally part of the same tax parcel and was segregated in the 1950s and 1960s. The 1964 City directory lists Renton Key & Saw Shop and Sea-Tac Cycle Shop at 760 Rainier Avenue S., which appears to have been an earlier address for the subject property, as a c. 1968 survey map in City of Renton records indicates a cycle shop in the southwest corner of the parcel. The survey map also shows that a barn, shed, and a concrete foundation were on the parcel at that time. According to assessor records, the auto showroom and shop were constructed in 1968. This was the first known use of the subject property for auto-related purposes. City directories indicate the building was first occupied by Robinson & Lyon Ford and then by Sound Ford since approximately 1975. Assessor records indicate that the showroom/shop building was originally heated by heating oil and included 18 hoists, a machine shop, one 2,000-gallon gasoline tank, and one 550-gallon tank for which the contents are not specified (presumed to be heating oil). The building is currently heated by natural gas (Vickers, 2017). It is not known when use of heating oil ceased. The location of the heating oil tank, and whether it was aboveground or underground, 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 9 is not known. The shop area of the building was heated at least partially at times by burning waste oil (Vickers, 2017). Original drawings of the building from 1968 obtained from the City of Renton show that several current features of the service shop have been present since it was constructed, including a trench drain extending along the interior length of the shop and discharging to an oil/water separator inside the south end of the building, and the oil/water separator outside the southeast corner of the building. Both oil/water separators are shown as being connected to the sanitary sewer. Storm drains are shown as discharging to a ditch along the southern boundary of the parcel. A sump is also indicated at the western side of the shop; however, this feature is not known to be present (Vickers, 2017). With some modifications, King County Metro approved the oil/water separators and trench drain for industrial waste discharge to the sanitary sewer, according to City records. However, a final inspection notice from the City of Renton indicates that the sanitary sewer system at the subject property was originally privately owned and was not installed according to unspecified City requirements. No information was found to indicate that an onsite septic system was used. A 1968 plan of the southern end of the service shop obtained from City records shows a spray booth was added adjacent to the machine shop. It also shows an adjacent area with a floor drain (currently identified as the undercoat room). In 1996/1997, some of the 18 original hydraulic sub-floor hoists in the shop were removed and sealed at the surface with concrete (Vickers, 2017). According to information in a previous Phase I ESA and confirmed by Mr. Vickers, some of the hoists were found to have leaked (Golder Applied Technologies, 1997; Vickers, 2017). Soil sampling was reportedly conducted during excavation of the hoists, and impacted soil was stockpiled temporarily onsite and subsequently incinerated. No report of the excavation, disposal, or soil sampling activities was available (Snyder, 2017; Vickers, 2017). The above-floor apparatus of the remaining hydraulic hoists was removed; however, the associated pistons and tanks below the floor level remain present. Additions were constructed in 1999 to expand the showroom and office areas of the building. These additions did not affect the parts and service shop areas. Fire department records contain information regarding aboveground storage tanks (ASTs), underground storage tanks (USTs), and hazardous materials storage at the facility. Four 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 10 ASTs for oil storage are indicated in and around the service shop. Multiple copies of UST removal permits from 1989 have different tank numbering schemes, which makes it difficult to determine how many USTs were removed, but it appears there were possibly as many as nine. A diagram indicates seven USTs, five of which were located around the service shop. One UST is indicated as being north of the service shop next to a metal building; however, the location of that UST was not able to be determined. The records indicate that contamination was found during removal of at least some of the USTs. There is no comprehensive report documenting removal of the all of the USTs (Snyder, 2017). UST records submitted to Ecology are discussed in Section 6.2.1. This building stopped being used for showroom and service shop purposes in approximately 2008 during the economic downturn (Vickers, 2017). The showroom is currently vacant, the parts area continues to be used for parts storage, and the service shop is used for detailing. 4.1.2 RTN002 The 1965 aerial photograph shows one small structure on RTN002 together with piles of materials stored outside. The parcel was part of a larger lot that extended to the north, which is shown on a c. 1960s Kroll map as being occupied by Renton Concrete. According to assessor records, the current body shop building on the parcel was constructed in 1971 and has been heated by natural gas since that time. Aerial photographs show that the three power transmission towers on the eastern side of the parcel were installed sometime between 1968 and 1977. Assessor records indicate that the body shop building originally included one car hoist and two truck hoists; however, these were not all shown on drawings. The floor plan of the building changed several times, according to assessor records, City of Renton building and fire department records, and records obtained from Sound Ford. Paint spray booths appear to have been located in several different areas over time. The current spray booths were installed in 2001. Fire department records indicate that a waste oil UST was removed from outside the west wall of the building in 1989. There is no comprehensive report or records documenting this UST removal (Snyder, 2017). UST records submitted to Ecology are discussed in Section 6.2.1. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 11 Waste paint thinner was stored outdoors in an area at the east side of the body shop at least as recently as 2005, according to fire department records. That area was reportedly surrounded by chain-link fencing and a concrete berm, but was not covered (Vickers, 2017). 4.1.3 RTN003 Aerial photographs, topographic maps, and a survey map in City of Renton records show that the Northern Pacific railroad line through this parcel remained present through at least 1968. It is referred to as a Burlington Northern rail line on a 1973 topographic map. By 1977, an aerial photograph shows the area was paved and the parcel was being used for car parking associated with the dealership on RTN001. According to assessor records, the used car office at the western end of this parcel was constructed in 1983 and included offices and a small two-bay service shop at the northwest corner. The original heat source is not listed. The current heating system is listed as a “package unit” in assessor records and reportedly uses natural gas (Snyder, 2017). The building does not appear to have undergone modification from the time it was constructed, and is currently vacant. No ASTs or USTs are known to have been in this area. Assessor records indicate that the building at the eastern end of this parcel was constructed in 1986. Mr. Snyder reported that a minor amount of concrete debris was discovered during excavation for the building foundations (Snyder, 2017); this was presumed to be related to the former concrete business that operated to the north of this area, according to a c. 1960 Kroll map and aerial photographs. The building originally included a showroom and offices. An addition was constructed in 1990 to add a service shop and other support areas. Assessor records indicate that the building has always been heated by natural gas. Occupants identified in historical records include Sound Suzuki, Sound Mitsubishi, and Walker’s Renton Mazda, which currently occupies the building. Fire department records indicate as many as five ASTs for oil and/or waste oil have been present at this facility. No USTs are known to have been in this area. 4.1.4 RTN004 The cleared strip that appears on the 1936 aerial photograph along the southern boundary of this parcel becomes less distinct over time until by 1965 only a remnant of it is visible. This is identified on a c. 1940 Kroll map as a Puget Sound Electric Railway right-of-way. This passenger railway was present from 1902 until 1930 when the rails were removed (Wikipedia, 2017). The right-of-way is identified on later Kroll maps and on assessor records as being a 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 12 right-of-way for Puget Sound Power & Light. By 1977, the parcel was paved and being used for car parking, as at present. 4.2 Adjacent Site History The surrounding area was generally rural until the mid-1960s, as shown on aerial photographs. Histories of adjacent properties are discussed below in a clockwise order beginning with properties to the north. 4.2.1 Adjacent Properties to the North According to King County iMap, the current auto dealership north of RTN001 was constructed in 1965. The former concrete business north of RTN002 appears to have remained present until approximately 1980, according to aerial photographs. King County iMap indicates it was replaced in 1985 with the current auto dealership building at that location. 4.2.2 Adjacent Properties to the Northeast and East The area to the east was an undeveloped field until approximately 1977 when aerial photographs show the land was disturbed and an access road extended to that area from the north. By 1980, the area had been cleared and graded for the current park & ride lot, which is shown as completed on the 1985 aerial photograph. 4.2.3 Adjacent Properties to the South To the south, across S. Grady Way, a service station has been present since at least 1965, according to aerial photographs. This is the current location of a Chevron station, which was built in 1992, according to King County iMap. The hotel to the south has also been present since 1965, according to aerial photographs and King County iMap. 4.2.4 Adjacent Properties to the Southwest To the southwest, across the intersection of S. Grady Way and Rainier Avenue S., residences or small commercial businesses were present as early as 1936, according to aerial photographs. These remained present until the current Sound Ford facility was constructed there in 1997, according to King County iMap. 4.2.5 Adjacent Properties to the West To the west, across Rainier Avenue S., the southernmost area was occupied by the railroad line until 1990 when the Kia dealership was developed, according to aerial photographs 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 13 and iMap. To the north of that, the area was occupied by an undeveloped field and then a nursery until a gas station was built in 1966, according to aerial photographs and King County iMap. The southern portion of the gas station building was probably originally an auto repair shop associated with the gas station. It has been occupied by tire shops and auto repair shops from at least the 1980s and by an auto glass business since approximately 2013, according to City directories. The area north of the gas station has been occupied by a parking lot since the 1960s, for the current Walmart store and a similar retail business before that, according to aerial photographs. To the northwest, an “auto camp” was present from the 1940s to 1960s, according to a Kroll map and aerial photographs. The current restaurant building at that location was constructed in 1972. It was occupied by a cleaner/laundry business from approximately 1975 to 1980, according to City directories, and has been occupied by restaurants since 1982. 5.0 RESULTS OF FIELD RECONNAISSANCE The site reconnaissance was conducted by Mr. Ryan Peterson of Shannon & Wilson and Ms. Dion Valdez of Constellation Services (subconsultant for Shannon & Wilson) on November 13, 2017. Access to the subject property was provided by Mr. Rich Snyder, President of Sound Ford, representing the subject property owner. Mr. Leo Vickers, Parts Manager of Sound Ford, accompanied Mr. Peterson and Ms. Valdez for most of the site reconnaissance. Selected features are shown on Figures 3 through 5, and representative photographs taken during the site reconnaissance are provided in Appendix B. A copy of the Site Inspection Checklist, along with interview notes with Mr. Snyder and email communication with Puget Sound Energy (PSE), are included in Appendix C. 5.1 Subject Property The subject property consists of four structures surrounded by asphalt-paved parking and driveway areas and some small landscaped areas. In general, the asphalt-paved surfaces are in poor condition with many areas that are patched, cracked, or sunken. Several round sunken areas were observed that appeared to be possible former borehole locations; however, they did not appear to coincide with known historical explorations at the site. Ponded stormwater was present on the surface in many paved areas and no sheen, foam, or other indications of potential contamination were observed on the water surfaces. Observations associated with each of the four parcels at the subject property are discussed below, including exterior areas around each building followed by interior areas. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 14 5.1.1 RTN001 5.1.1.1 Exterior Areas A pad-mounted transformer is located outside the north side of the showroom/ parts/service shop building. A tag on the transformer indicates that this unit and two others were rejected for oil leaks or absence of testing. Additional information from a PSE representative indicates that the leak should have been corrected and this tag should have been removed before the unit was installed in 2013 (Swayne, 2017 [Appendix C]). Given the recent age of the unit but with the absence of labeling and no further information from PSE regarding PCB content, it is not known if it contains polychlorinated biphenyls (PCBs). No evidence of leakage was observed around the base of the transformer. Releases from the unit would be the responsibility of PSE. Near the fence line north of the building, an underground vault was observed marked “Power.” A small hole had been cut in the top of the metal cover plate and a pipe partially covered over with asphalt paving extends toward the hole. A PSE representative was asked about this feature and reported that it is not a transformer or any other electrical equipment known to them (Swayne, 2017 [Appendix C]). According to historical drawings and notes in Ecology records, this appears to house a fire suppression shut-off valve. Outside the northeast corner of the building is an enclosure that previously housed three ASTs. Gates at the north and south ends of the enclosure prevented access; however, a camera was inserted through the gate and the photo indicates that the ASTs have been removed. The interior contains some litter, lumber, metal fence posts, and remnants of hoses and electrical equipment associated with the former ASTs. Staining on the concrete walls and floor appeared to be oily. To the east of the AST enclosure is an area of patched asphalt paving that indicates the former location of three USTs. These USTs are discussed further in Section 6.2.1. The former dispenser pad for the gasoline UST in this area was observed at the north end of the AST enclosure. A capped pipe is still present there, indicating that the piping was not completely removed, and that the area under the dispenser was not assessed for contamination at the time the USTs were removed. Another patched area of asphalt paving was observed on the east side of the service shop, which indicates the former location of the waste oil UST (discussed further in Section 6.2.1). 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 15 A trench drain extends along the eastern side of the service shop. The drain appeared to be completely filled with litter and debris. No water was present in the drain. The drain connects to an oil/water separator at its south end. This oil/water separator is no longer maintained, since the shop is no longer used for auto repair activities (Vickers, 2016). An area outside the south end of the service shop was the previous location of a waste oil UST and AST; however, no evidence of those features remains. That area is now occupied by a ramp and fenced enclosure that previously contained the dumpster. 5.1.1.2 Interior Areas The western part of the building is a two-story structure that houses the former showroom, offices, and parts areas. The showroom and offices are vacant. An elevator room located at the north side of the showroom contains an AST with hydraulic oil. No evidence of leakage was observed on the concrete floor beneath the unit. The unit was manufactured in 1999 and was presumably installed at that time when the showroom addition in that area was constructed. An inspection log on the wall included the most recent entry from 2010, which noted that the elevator smokes. A separate inspection record dated 2012 had no notes describing the results of the inspection. The parts area is used for auto parts only; no liquid products are currently stored there and only quarts of motor oil were stored in the past (Vickers, 2017). The concrete floor of the parts area appeared to be in relatively good condition with no cracks or significant stains. On the second floor above the parts area is an electrical equipment area with five metal cabinets that were marked as transformers. Four of the units were clearly marked as being dry-type or Class AA (ambient air-cooled), indicating that they do not contain oil. One was not marked as to type, but included a manufacturer name (Acme Electric Corporation) and catalog number (T-1-53318-3). Through online research, a catalog was found that includes this catalog number in a listing of dry-type transformers (Appendix A). Therefore, none of the five transformers were found to potentially contain oil or PCBs. The eastern part of the building is the former service shop that is now used for detailing. A trench drain extends down the middle of the shop and is connected to an oil/water separator at the south end. The trench drain was full of standing water that appeared cloudy with a thin film on the surface, but the water did not appear oily. Cracks were observed in the concrete floor immediately adjacent to the oil/water separator. This oil/water separator is also no longer maintained (Vickers, 2017). 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 16 The service shop building originally included 18 sub-floor hydraulic hoists and some of these have been completely removed and sealed with concrete. For the remaining hoists, the above-floor apparatus has been removed, but the tanks and pistons remain present in vaults that are approximately 6 or 7 feet deep. Many of the vaults were covered with metal plates, but some were open at the top and the tanks and mechanical parts were observed inside the vaults. Most of the open vaults also contained trash consisting primarily of food-related wrappers and containers. The concrete floor of the service shop appears uniformly darkened from decades of use and the associated oil and dirt. There were also several areas where dark oily stains were present. Water was pooled in several places and beaded up on the oily floor surface. An alignment pit is located at the north end of the shop. Heavy oil staining was observed on the concrete floor of the pit. An unlabeled AST that appeared to be roughly 250 to 300 gallons in size was located along the west wall of the shop. This was reportedly used for storage of waste oil, which was sometimes burned for heating in the shop (Vickers, 2017). A slick layer of oil was present on the floor around the AST. No evidence was found of a sump indicated on historical drawings along the west wall of the shop. A room at the southeast corner of the building has been used for spraying undercoat onto vehicles. The floor and part of the walls are coated with the overspray. A floor drain in the center of the room is filled with the material. A deep wall-mounted sink is also present in this room. A room adjacent to the west of the undercoat room is believed to have a floor drain, based on historical drawings; however, the floor in that area was not visible due to drums and containers stored in that room. Numerous drums and containers were observed in various locations throughout the service shop. It was not possible to determine whether all of them were full or empty and it is not known whether they contain the products indicated on their labels. Several unlabeled drums and containers were also present in the service shop. Where present and legible, following is a list of descriptions observed on labels, which may or may not represent the contents of drums and containers currently present at the facility: 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 17 Reflex RX700A and RX700B GripCoat ServicePro Heavy Duty Engine Oil Malco Prizm Car Wash Z Maxx Brakewash (X-4402) Kerosene 1-K Heater Fuel FBC Auto Undercoat 2122FB MOC W.W. Special Shampoo NW Technologies BioFlow20 PCII Starter Solution for Bio-Remediating Parts Washers Master MHW Non-Ferrous Metal Cleaner Latex paint Translucent plastic containers in the undercoat room appeared to contain the detailing products indicated on the labels, as follows: Wesmar Aluma Kleen 800 Wesmar R.E.D. Multipurpose Cleaner Car Brite Citrus MP General Purpose Cleaner Car Brite Pre-Wash Car Brite Glass Cleaner Car Brite Purple Dressing High Gloss Tire Dressing 5.1.2 RTN002 5.1.2.1 Exterior A patched area of pavement on the west side of the body shop building indicates the former location of a waste oil UST (discussed further in Section 6.2.1). On the north side of the body shop building, a drum labeled as drive train fluid was observed outside near some concrete-filled buckets. These appeared to be used as moveable bollards. On the east side of the body shop building is a rectangular area that was previously used for outdoor storage of waste paint thinner. Most of the area was covered with parts of a truck body, tires, fenders, and other car parts. However, the former storage area was evident from the outline of an asphalt-paved pad with fence-post holes at the perimeter. No catch basins were observed in this area. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 18 The easternmost edge of RTN002 was observed from Lake Avenue, which is the access road for the adjacent park & ride lot. The subject property is several feet higher than the surface of Lake Avenue. At the abrupt edge of the pavement along the eastern edge of the parcel, a crushed rock layer at least 2 feet thick was exposed beneath the asphalt surface in some places. 5.1.2.2 Interior The south end of the body shop building contains offices and a room that was previously used as a paint spray booth. An aboveground hoist was located in this room. No evidence of a sub-floor hoist or floor drain was observed in this room. The central portion of the body shop building is used for repairing damaged vehicles by replacing or reshaping parts. No significant stains were observed on the concrete floor in this area, although it did appear darkened from decades of use. One concrete cut in the floor near the northwest corner of this area appeared similar to sealed hoists observed in other areas; however, employees who had been at the shop for 20 years or more had no recollection of a sub-floor hoist in this area of the shop. The northern section of the body shop building is used for painting and includes two paint spray booths and a mixing room on the east side, and a large paint preparation area on the west side. The paint spray booths have grates on the floor which, according to an employee, contain filters that capture solids from overspray and filter the exhaust. The filters are replaced on a regular basis and documented in a logbook. The paint mixing room is located between the two spray booths and contained numerous small containers of tint, and quart-to-gallon-size containers of thinners and coating products. The floor of the mixing room was splattered with paint. Small containers of premixed paint and spray cans of coatings are stored in flammables lockers in the paint preparation area. Paint guns are cleaned in an area along the south wall of the paint preparation area. The guns are cleaned with lacquer thinner (Pro Line Lacquer Thinner) which, according to the label, contains methyl alcohol, toluene, acetone, and light aliphatic solvent naphtha. Fresh and used lacquer thinner in this area was observed in 5-gallon metal containers stacked two high in metal tubs for secondary containment. A solvent recycler is used to remove solids and reclaim the solvent for reuse. A second solvent recycler was observed on the north side of the paint preparation area. A 5-gallon metal container of solvent was located beneath the recycler and that 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 19 product (Omni MS251) contains toluene, methanol, acetone, ligroine, and water. The facility reportedly produces very little waste solvent and uses Safety Kleen to dispose of it as needed (Vickers, 2017). In the paint preparation area, a large rectangular cut and patched area was observed in the concrete floor. An employee stated that this was a former alignment pit, similar to the one in the service shop, discussed above. Three former sub-floor hydraulic hoists were also observed in this area: two had been removed and were sealed with concrete at the surface, and one had a metal cover plate at floor level with the above-floor apparatus removed. Also present on the floor in this area was an approximately 8-inch-diameter round metal plate (with a hole in it), and an approximately 1-inch-diameter hole in the floor next to it. The plate and hole appear to be related to a former single-post hoist. Near the northeast corner of the paint preparation area, a circular cut and patch was observed in the concrete floor and appeared to be the location of a former floor drain indicated on historical drawings. The floor of the paint preparation area was stained with paint. 5.1.3 RTN003 RTN003 contains two buildings at the western and eastern ends, which are known as the used car and Walker’s Renton Mazda buildings, respectively. Each of these is discussed separately below. 5.1.3.1 Used Car Building – Exterior The used car building is currently vacant and the area around it was clear of vehicles. On the north side of the building, a disconnected pipe was observed exiting the building. A small rectangular area of patched asphalt approximately 2 by 3 feet was present in this area. The purpose of the pipe and the patched area was not clear. 5.1.3.2 Used Car Building – Interior The interior of the building includes offices and a two-bay service shop. The service shop was reportedly used for only minor repair work (Vickers, 2017). There was no evidence of hoists or floor drains in the service shop. The floor was uniformly darkened from long-term use and also had spots of dark staining. A 5-gallon paint bucket, a 1-gallon jug of antifreeze, and an unmarked 1-gallon jug were the only items stored in the shop room. An opening in the east wall of the service shop leads to a crawlspace that extends under the office areas of the building. Numerous discarded items were observed in the 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 20 crawlspace, including a box fan, tools, food wrappers and drink containers, plastic sheeting, lumber, and at least one item that appeared to be an engine part. The floor of the crawlspace was not visible due to the volume of items present. 5.1.3.3 Walker’s Renton Mazda Building – Exterior A fenced enclosure near the northwest corner of this building contained a dumpster and a 500-gallon AST for waste oil. The asphalt-paved surface around the AST was black with oil. Discarded items were on the pavement around the AST and dumpster, including cardboard, polyvinyl chloride piping, as well as litter and metal nuts and washers. A pile of tires was stored just outside the fenced enclosure. A wash bay is located on the east side of the Walker’s Renton Mazda building. It has apparently been installed recently and Mr. Vickers had no knowledge of it (Vickers, 2017). 5.1.3.4 Walker’s Renton Mazda Building – Interior The interior of the building includes offices, a parts counter, a customer waiting room, and a nine-bay service shop. Aboveground hoists are present in the service shop and no evidence of sub-floor hoists was observed. The concrete floor appeared uniformly darkened from use, but some areas of the floor in the main service area were not visible due to the presence of vehicles and rags placed on the floor, apparently to capture drips. An area at the western end of the shop included barrels for fresh and waste antifreeze, windshield cleaner concentrate, and a waste oil drum with a filter crusher above it. The waste oil drum was on a secondary containment pallet. A room at the western end of the shop contains three ASTs labeled as follows: 500 gallons for motor oil, 55 gallons for motor oil, and 165 gallons for transmission fluid. Oily stains were observed on the floor behind and between the ASTs and near two 5-gallon buckets of wheel bearing grease also stored in this room. 5.1.4 RTN004 This parcel is occupied by parking spaces and landscaped areas and has exterior areas only. The only structures present are two power transmission towers located along the southern edge of the parcel. A pad-mounted cabinet at the western end of the parcel is an electrical switch box, and an adjacent underground vault contains a transformer (Swayne, 2017 [Appendix C]). PSE did not provide information regarding PCB content. Releases from the unit would be the responsibility of PSE. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 21 5.2 Adjacent Properties Adjacent properties were viewed from publicly accessible areas (i.e., roadways and sidewalks). To the north, the Walker’s Renton Mazda dealership building appears to have a current or former service shop at the back. The Car Pros Hyundai dealership to the north has a large service shop. Both dealerships appeared well maintained and no obvious issues of potential environmental concern were observed. These properties appear to be at a similar or slightly lower elevation than the subject property. To the east, the South Renton Park & Ride is an asphalt-paved parking lot that appeared to be in good condition. To the south, across S. Grady Way, the Wells Fargo bank, Chevron station, and Red Lion Hotel all appeared to be well maintained and typical of those types of properties. These properties appeared to be at a similar elevation as the subject property. To the southwest, across the intersection of S. Grady Way and Rainier Avenue S., the current Sound Ford dealership building appeared well maintained and the surrounding paved parking areas were covered with vehicles. To the west, across Rainier Avenue S., the Car Pros Kia dealership consists only of a paved parking lot in the area nearest to the subject property. To the north of that is an auto glass shop and a Mobil station. The Mobil station is situated a few feet lower in elevation than the subject property. These properties, and the Walmart parking lot and a small restaurant farther to the north, all appeared generally well maintained. With the exception of the two service stations, no issues of potential environmental concern were observed on the adjacent properties. 6.0 RESULTS OF ENVIRONMENTAL RECORDS REVIEW Regulatory agency records were reviewed for the subject parcel and nearby properties to identify known or potential sources of contamination that could adversely impact the subject parcel. We authorized EDR to conduct a search of the EPA, Ecology, and local and tribal environmental databases that contain information regarding environmental conditions at and near the subject parcel (EDR, 2017d). The EDR report was reviewed for accuracy of site locations and to identify the approximate location of “orphan” sites that EDR was unable to locate due to poor or inadequate address information. The complete EDR report, including figures identifying locations of reportable sites within 1 mile of the subject parcel, is provided in Appendix D. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 22 6.1 Environmental Data Resources, Inc. (EDR) Report Review Multiple sites within the selected search radii are listed in the local, state, and/or federal databases that were reviewed. Some of the sites are listed in multiple databases. Table 1 includes information about listed sites with confirmed or suspected contamination that are within approximately ¼ mile of the subject parcel for sites that are potentially upgradient. The table also includes information about such sites within approximately 400 feet in other directions from the subject property. Other sites identified by the EDR search were not reviewed further because they are: Located down- or cross-gradient from the subject parcel and greater than 400 feet away. Too far away, based on the contaminant type, to likely affect the subject parcel. Registered only as generators of hazardous waste with no disposal or reporting violations and no documented evidence of contaminant releases. Listed in the state UST database but not listed in state and/or federal databases that would indicate that a release has occurred. Not known to have contamination. Out of the 11 sites listed in Table 1, 5 were excluded from further evaluation based on remediation status, distance, or direction from the subject property. Addresses associated with the subject property appear on some of the databases researched by EDR. The subject property did not appear on databases of institutional and engineering controls at sites where residual contamination may be present (i.e., activity and use limitations). Although not listed in the EDR report, area-wide contamination exists from a former Asarco copper smelter in Ruston, Washington (approximately 18 miles southwest of the subject property). The smelter released great quantities of arsenic, lead, and other heavy metals through its smokestack for almost a century until it was closed in 1985. Heavy metals from its smokestack are known to have settled in soils of Pierce and King Counties, causing widespread contamination. The subject property is mapped by Ecology as being within an area where arsenic concentrations are estimated to be less than 20 milligrams per kilogram (the MTCA Method A Cleanup Level for soil for unrestricted land uses) (Ecology, 2017). However, this is based on limited sampling data and concentrations on a given property may be higher or lower. 6.2 Washington State Department of Ecology (Ecology) File Review Based on their locations and distances from the subject parcel, as well as types of contaminants and indications of potential groundwater impacts, three sites listed in Table 1 and referred to in 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 23 the previous section were selected for further review and are discussed below. Information regarding these sites was collected from the EDR report; records at the Ecology Southwest Regional Office in Lacey, Washington; and Ecology records archived at the Washington State Archives in Olympia, Washington. Selected portions of documentation reviewed at Ecology and Washington State Archives are included in Appendix E. 6.2.1 Sound Ford, 750 Rainier Avenue S. According to the EDR report, six USTs were removed at this location (which includes RTN001 and RTN002). The facility is listed in the Confirmed and Suspected Contaminated Sites List (CSCSL) database as having gasoline contamination confirmed in soil and groundwater, and benzene and petroleum-other are confirmed in soil and suspected in groundwater. The facility has been a hazardous waste generator (referred to as dangerous waste in Washington State). Following is a summary of information obtained from dangerous waste and UST records contained in Ecology’s files. 6.2.1.1 Dangerous Waste Records Sound Ford first reported generating dangerous waste in 1983. The waste is listed as spent lacquer thinner. By 1993, the annual waste generation report lists wastes containing benzene, tetrachloroethylene, oil, lead, mineral spirits, ethylene glycol, xylenes, 1-1-1 trichloroethene, toluene, ethylbenzene; and paint-related wastes containing methanol, MEK, MIBK, toluene, xylenes, acetone, n-butyl alcohol, ethyl acetate, methylene chloride, and isopropanol. A 1995 Pollution Prevention Plan contains details of processes at the facility and states that the facility converted from lacquer-based paints and lacquer thinner to use of polyurethane paints. Painting was done in paint booths with filters managed by a service. Paint guns were cleaned in machines that recycle the solvent. Parts cleaning was done using a cabinet spray washer and pressure washing system, and used mineral spirit solvents were managed by a service. Used oil and antifreeze were collected for recycling. A 1994 technical assistance visit indicates the facility generated toluene, paint wastes, and lacquer thinner. Items noted for improvement included soapy wash water and spray cabinet water being dumped into an oil/water separator, unlabeled antifreeze drums, and car wash water draining to a storm drain. A 1997 compliance visit found no violations but recommended consideration of another option for outside storage of containers. A 2000 technical assistance visit found that cars were washed outside and draining to an oil/water separator with some drainage entering the storm drain system. In addition, waste gun wash 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 24 solvent was being collected in 5-gallon drums in a satellite area and then taken outside and transferred to a 55-gallon drum stored outside and uncovered. 6.2.1.2 Underground Storage Tank (UST) Records Four USTs are listed on a 1986 UST notification form, which was the earliest one found. The USTs are listed as being 11 to 15 years old (i.e., installed 1971 to 1985) and are identified as follows: One 1,000- to 4,999-gallon unleaded gasoline One 500- to 999-gallon motor oil One 500- to 999-gallon transmission fluid One 1,000- to 4,999-gallon waste oil After that time, there are various lists of USTs associated with the site from various sources, which are not easily reconciled. A contractor (Lee Morse) proposed removal of six USTs, the Renton Fire Department issued a permit for removal of seven USTs, and a statement from Lee Morse mentions a Tank #9 at Sound Mazda, which could refer to their onsite facility or the adjacent property to the north. A summary prepared by Ecology of the UST removal records indicates that seven USTs were removed; however, the location of one could not be confirmed. In summary, at least six USTs are understood to have been removed in 1989 (Figures 3 and 4). Mr. Snyder reported that, at that time, the USTs to be removed were determined by Mr. Morse, who was instructed to inspect the property to identify any USTs and to remove them (Snyder, 2017). No comprehensive report of the UST removal activities was prepared. A crude diagram of tank and soil sampling locations, and soil sampling analytical reports were submitted to Ecology. Following is a summary of analytical data for composite soil samples collected by Lee Morse Construction in July 1989 (no other testing results were noted in Ecology files): 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 25 Sample ID TPH (Method 418.1) (mg/kg) Benzene (mg/kg) Toluene (mg/kg) Ethylbenzene (mg/kg) Xylenes (mg/kg) 1 – Waste Oil ND (<10) 2–Waste Oil 46 3–Waste Oil 88 4 – Motor Oil 11,000 5 – Motor Oil 2,100 6 - Gasoline 13 30 17 78 7 – Motor Oil 11 MTCA-A 2,000 (heavy oil) 0.03 7 6 9 Notes: Concentrations in bold exceed MTCA-A Method 418.1 does not quantify petroleum fractions (i.e., gasoline or heavy oil) separately mg/kg = milligrams per kilogram MTCA-A = Model Toxics Control Act Method A Cleanup Level (current) ND = Not detected (i.e., less than reporting/detection limit indicated) TPH = total petroleum hydrocarbons A report was subsequently prepared by Rittenhouse Zeman & Associates (RZA) (RZA, 1989) regarding activities to address contamination at a group of three USTs that were located together at the northeast corner of the service shop on RTN001 (which relate to sample locations 4, 5, and 6 in the table above). The tanks are identified as a 2,000-gallon gasoline tank, a 500-gallon lube oil tank, and a 500-gallon automatic transmission fluid tank. Backfill that had been temporarily placed in the excavation was re-excavated and additional contaminated soils were overexcavated. Discrete soils samples were collected by RZA in August and September 1989 from the excavation limits. A table of the data was not included in Ecology’s files. Based on laboratory data sheets that were included, the following analytical results were reported: 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 26 Sample ID TPH (Method 418.1) (mg/kg) Benzene (mg/kg) Toluene (mg/kg) Ethylbenzene (mg/kg) Xylenes (mg/kg) S-1A 67.3 ND (<0.05) ND (<0.05) ND (<0.05) 0.10 S-2A 154 ND (<0.05) ND (<0.05) ND (<0.05) ND (<0.05) S-3A 17.2 0.74 0.12 ND (<0.05) 0.41 S-4A 20.8 ND (<0.05) ND (<0.05) ND (<0.05) ND (<0.05) S-5A 132 ND (<0.05) ND (<0.05) ND (<0.05) ND (<0.05) S-6A 57,155 S-6B (after overexcavation of S-6A) 36.6 S-7A 14 ND (<0.05) ND (<0.05) ND (<0.05) ND (<0.05) MTCA-A 30, 100, or 2,000* 0.03 7 6 9 Notes: * 30 mg/kg (TPH-G when benzene is present), 100 mg/kg (TPH-G when benzene is not present), 2.000 mg/kg (heavy oil) Concentrations in bold exceed MTCA-A Method 418.1 does not quantify petroleum fractions (i.e., gasoline or heavy oil) separately mg/kg = milligrams per kilogram MTCA-A = Model Toxics Control Act Method A Cleanup Level (current) ND = Not detected (i.e., less than reporting/detection limit indicated) TPH = total petroleum hydrocarbons TPH-G = TPH quantified as gasoline Water was observed seeping from the northwest corner of the excavation and a sample was collected from the excavation. As such, the sample may not be representative of actual groundwater conditions. However, the analytical results tabulated below are compared to MTCA-A cleanup levels for groundwater for general evaluation purposes: 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 27 Sample ID TPH (418.1) (μg/L) Benzene (μg/L) Toluene (μg/L) Ethylbenzene (μg/L) Xylenes (μg/L) S-8A 91,000 25 13 ND (<1) 66 MTCA-A 800, or 500* 5 1,000 700 1,000 Notes: * 800 μg/L (TPH-G when benzene is present), 500 μg/L (heavy oil) Concentrations in bold exceed MTCA-A Method 418.1 does not quantify petroleum fractions (i.e., gasoline or heavy oil) separately μg/L = micrograms per liter MTCA-A = Model Toxics Control Act Method A Cleanup Level (current) ND = Not detected (i.e., less than reporting/detection limit indicated) TPH = total petroleum hydrocarbons TPH-G = TPH quantified as gasoline In 1991, Sound Ford submitted a UST closure checklist identifying four USTs that were removed in October 1989 for which contamination was found. This appears to refer to the three USTs that were in a single location where the above-described overexcavation and sampling took place. The fourth UST is a 500-gallon UST referred to as #1, which appears to correlate to a former waste oil UST on the west side of the body shop. Based on the information in Ecology files, potential sources of contamination at the subject property include petroleum products, chlorinated and non-chlorinated solvents, and lead, in areas in and around the service shop and body shop, including oil/water separators, storm drains, an outdoor drum storage area, and former UST locations. Contamination has been identified at the former UST location at the northeast corner of the service shop. Based on the poor documentation of UST locations and removals, it is possible that additional USTs and/or unidentified contamination at former UST locations may be present. 6.2.2 Walker’s Renton Mitsubishi/Mazda, 200 S. Grady Way According to the EDR report, this facility (located on RTN003) has been a dangerous waste generator. Wastes generated consisted of waste motor oil residue and coolant, which were recycled by a service. No violations were found related to dangerous wastes. The only record provided by Ecology for this facility was a TurboWaste printout, which indicates the facility has been a dangerous waste generator since 1995. The facility was originally a medium-quantity generator and has been a small-quantity generator (SQG) since 2003. SQGs generate between 100 and 1,000 kilograms of hazardous waste per month. Based on the limited information available regarding dangerous wastes generated at this location, the potential for the Walker’s Renton Mitsubishi/Mazda to significantly affect environmental conditions at the subject property is considered low. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 28 6.2.3 Renton Subaru Peugeot/Walker’s Renton Subaru, 720 Rainier Avenue S. According to the EDR report, one UST was removed at this facility, located adjacent to the north of the subject property. The facility has been a dangerous waste generator with no related violations. Ecology records indicated that a 300-gallon used oil UST was decommissioned in 1989. It is not clear whether it was removed or closed in place. The UST had been in use for four years. No contamination was found. The only dangerous waste record provided by Ecology was a TurboWaste printout, which indicates the facility was a dangerous waste generator from 1995 to 2002, and withdrew their generator ID number in 2003. The types of wastes generated are not listed. Based on the limited available information, the potential for this facility to adversely affect environment conditions at the subject property is considered low. 6.2.4 USA Petroleum/Mobil #68406, 765 Rainier Avenue S. The EDR database information indicates that five USTs have been removed and three are operational at this service station located adjacent to the west of the subject property, across Rainier Avenue S. This facility is listed on the CSCSL as having benzene and gasoline confirmed in soil and groundwater, and non-halogenated organics confirmed in groundwater. The facility has been a dangerous waste generator with no related violations found. According to information in Ecology’s files, the service station began operation in 1975. After USTs were removed, groundwater monitoring wells were installed to evaluate the extent of petroleum contamination. Several remediation systems were operated between 1995 and 2008, including air sparging, vapor extraction, and a high-vacuum liquid ring pump. Additional excavation and removal of contaminated soil was also accomplished during replacement of USTs in 2013. Groundwater monitoring has been conducted since 1992. The most recent groundwater monitoring data available is from the second quarter of 2017, which indicated that concentrations of gasoline-, diesel-, and oil-range hydrocarbons; benzene, toluene, ethylbenzene, and xylenes (BTEX); lead; and gasoline additives were below MTCA-A cleanup levels for groundwater in all the wells sampled. A rose diagram depicting all groundwater flow directions measured through 2017 indicates that the direction of groundwater flow at this location is predominantly toward the south-southwest, with minor variations toward the west-southwest and southeast. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 29 Based on the direction of shallow groundwater flow, the potential for the USA Petroleum/Mobil station to adversely affect environmental conditions at the subject property is considered low. 6.2.5 Grady Way Chevron, 301 S. Grady Way According to the EDR database report, six USTs have been removed and three are operational at this service station located adjacent to the south of the subject property, across S. Grady Way. The CSCSL database indicates that benzene and gasoline are confirmed in soil and groundwater. According to information in Ecology’s files, a service station has operated at this location since 1964. The facility originally included an auto repair shop but was rebuilt and reconfigured to a service station only in 1992. Petroleum contamination was first discovered in 1991 and groundwater monitoring began that year. Soil remediation was planned to occur in conjunction with removal and replacement of USTs during redevelopment for the new service station; however, a report of those activities was not found in the files. Files for the Chevron site contained numerous groundwater monitoring reports that were reviewed for information regarding the direction of shallow groundwater flow. A selection of groundwater flow diagrams indicates that the direction has been inconsistent and has generally varied from northeast to southeast. The most recent groundwater monitoring report found is from 2011 and indicates that the groundwater flow direction is toward the south. At the time of the 2011 groundwater sampling, concentrations of petroleum hydrocarbons, benzene, and ethylbenzene exceeded MTCA-A cleanup levels in wells located along the northern edge of the Chevron site, which are nearest to the subject property (approximately 100 feet from the south boundary of RTN004). Maximum concentrations in groundwater from these wells included total petroleum hydrocarbons (TPH) quantified as gasoline detected at 5,000 micrograms per liter (μg/L), TPH quantified as diesel at 690 μg/L, benzene at 950 μg/L, and ethylbenzene at 730 μg/L; the associated MTCA-A cleanup levels are 800 μg/L (where benzene is present), 500 μg/L, 5 μg/L, and 700 μg/L, respectively. In one of these wells (MW-3), free-phase hydrocarbons were reported as being present as recently at 2007. Based on the relatively high concentrations of contaminants remaining present 20 years after initial discovery within close proximity to the subject property, and the fluctuations in groundwater flow direction over time, the potential for the Chevron site to affect environmental conditions at the subject property is considered high. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 30 6.2.6 Renton Lincoln-Mercury, 201 S. 7 th Street The EDR database report indicates that two USTs were removed at this facility, located adjacent to the north of the subject property. The facility entered the voluntary cleanup program and received a CSCSL no further action in 2013. According to Ecology records, two USTs for waste oil and gasoline were located approximately 170 and 230 feet north of RTN002, respectively, and were removed in 1989. Soil contamination was reportedly identified in connection with the gasoline UST; however, no documentation was available. Soil sampling in 2013 around each of the former UST locations found no detectable concentrations of TPH, BTEX, volatile organic compounds (VOCs), or metals. Groundwater samples collected in 2013 from an existing well at the former gasoline UST location and from temporary borings contained no detectable concentrations of TPH, BTEX, or VOCs. Based on the above information, the potential for the Renton Lincoln-Mercury site to adversely affect environmental conditions at the subject property is considered low. 7.0 PREVIOUS ENVIRONMENTAL REPORT REVIEW Mr. Snyder provided a copy of a previous Phase I ESA report prepared in 1997 (Golder Applied Technologies, Inc., 1997). The area assessed appears to have included RTN001, RTN002, and the western halves of RTN003 and RTN004. The text of the report, and associated figures and photographs, are provided in Appendix G. The report describes site conditions and operations at that time, as well as some historical information; however, it should be noted that some details conflict with information obtained by Shannon & Wilson during the course of the current Phase I ESA. The 1997 Phase I ESA identified several potential sources of environmental impact, including the onsite oil/water separators, sub-floor hydraulic hoists, and former USTs; and four LUST sites in the vicinity. No evidence was found to indicate that any actions were undertaken in response to the findings of the 1997 Phase I ESA. 8.0 INTERVIEWS 8.1 Site Representative Interview Mr. Rich Snyder, President of Sound Ford, was interviewed in person prior to the site reconnaissance. He has been familiar with the subject property since approximately 1986, and 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 31 has been an owner of the subject property and/or the building located on it since the late 1980s or early 1990s. Information provided by Mr. Snyder is included and referenced in relevant sections of this report. Mr. Leo Vickers, Parts Manager for Sound Ford, provided information during the course of the site reconnaissance. He has been familiar with the subject property for approximately 34 years. Information provided by Mr. Vickers is included and referenced in relevant sections of this report. 8.2 User-Provided Information Mr. Mark Menard, an Environmental Manager with Sound Transit, completed a user questionnaire on October 6, 2017. Mr. Menard indicated that searches for environmental liens or activity and use limitations have not been conducted. He reported having no specialized knowledge of the subject property and was not aware of any commonly known or obvious information regarding the presence or likely presence of releases at the property. Mr. Menard reported that the purchase price for the property reflects the fair market value. A copy of the completed user questionnaire is included in Appendix F. Sound Transit provided a copy of a title report prepared by Chicago Title Company of Washington, dated June 16, 2017 (Chicago Title Company of Washington, 2017). The title report notes the existence of multiple easements for utilities. No issues of potential environmental concern were noted in the title report. 9.0 DATA GAPS Within the context of our AAI for RECs at the subject property, we have identified the following data gaps: Interview with Past Owner ʊ The past owner of the subject property, Victor Diambri, is deceased. Given the information obtained from extensive research about the physical features of, and operations at, the subject property, the inability to interview the past owner is not considered a significant limitation to our understanding of site conditions. 10.0 SUMMARY OF FINDINGS AND CONCLUSIONS Shannon & Wilson has performed a Phase I ESA in conformance with the Scope and Limitations of ASTM Practice E1527-13 for the subject parcels located at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington. Any exceptions to, or deletions from, this practice are 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 32 described in Section 9.0 of this report. This assessment has revealed RECs in connection with the subject property as follows: 10.1 Subject Property The long history of auto repair activities on RTN001 and RTN003 and auto body shop activities on RTN002 represent potential sources of localized subsurface contamination from petroleum hydrocarbons and chlorinated and non-chlorinated solvents near and beneath the onsite buildings. Documentation regarding the 1989 removal of USTs at the subject property (RTN001 and RTN002) is incomplete and contamination may remain present at the known locations of former USTs. The dispenser pad associated with the former gasoline UST on RTN001 was not removed, and subsurface conditions under the dispenser pad have not been not assessed. In addition, given that not all of the former USTs were initially inventoried, it is possible that unknown USTs remain present on the subject property. There is no documentation regarding the 1996/1997 removal of some of the sub-floor hydraulic hoists and associated soils from the buildings on RTN001 and RTN002. Soil contamination was reportedly identified at some of the hoist locations. Sub-floor hoist locations represent potential sources of subsurface contamination from hydraulic oil and possibly PCBs. The hoist vaults also represent potential conduits for contaminants from products used in those areas to enter the subsurface. Current and former floor drains, trench drains, oil/water separators, and alignment pits on RTN001 and/or RTN002 represent potential conduits for subsurface contamination from products used in those areas. Numerous containers in the service shop on RTN001 may contain unknown substances that need to be characterized and properly disposed of. The former outdoor drum storage area east of the body shop (RTN002) was used to store waste paint thinner that was transferred from smaller containers to drums in that area. This area represents a potential source of subsurface contamination from chlorinated and non-chlorinated solvents. Discarded items in the crawlspace under the used car building on RTN003 may include items that contain or have released petroleum products or hazardous substances. Releases of waste oil have occurred in the area under and around the waste oil AST located outside the Walker’s Renton Mazda building on RTN003. The AST represents a potential source of subsurface hydrocarbon and solvent contamination. The former rail line that extended through RTN003 is a potential source of contamination from drips and leaks of fuel and lubricants from engines and rail cars, spills of petroleum products and other hazardous substances transported through the 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 33 subject property, wood preservatives used on railroad ties, and herbicides used for weed control. The former electric railway line along the southern edge of RTN004 represents a potential source of contamination from wood preservatives and herbicides. 10.2 Adjacent Property (Chevron Service Station, 301 S. Grady Way) Groundwater contamination has been known to exist at this location approximately 100 feet south of the subject property for at least the past 20 years. The groundwater flow direction has been inconsistent but has at times included a northeasterly component. Therefore, the Chevron site represents a potential source of contamination at the subject property from petroleum hydrocarbons and BTEX. 11.0 LIMITATIONS, UNCERTAINTY, AND RISK This Phase I ESA was conducted to render a professional opinion about the likelihood of regulated contaminants being present on, in, or beneath the subject property at the time services were conducted. No matter how thorough a Phase I ESA study may be, findings derived from its conduct are limited, and Shannon & Wilson and Constellation Services cannot know or state for an absolute fact that a site is unaffected by reportable quantities of regulated contaminants. Furthermore, even if Shannon & Wilson and Constellation Services believe that reportable quantities of regulated contaminants are not present, Sound Transit still bears the risk that such contaminants may be present or may migrate to the site after the study is complete. Shannon & Wilson and Constellation Services have reviewed historical records and conducted an on-site visual inspection of the subject property. We have examined and relied on documents referenced in the report and on oral statements made by certain individuals. We have not conducted an independent examination of the facts contained in referenced materials and statements. We have assumed that these documents are genuine and that the information provided in these documents and statements is true and accurate. We have no knowledge or indication to the contrary unless otherwise stated in the body of the report. Data generated from the site reconnaissance reflect that which can be reasonably inferred or is obvious by direct visual observation. Shannon & Wilson and Constellation Services assume no responsibility for identifying characteristics of the subject property that were not readily identifiable by visual reconnaissance at the time of our site visit. Shannon & Wilson and Constellation Services have prepared this report in a professional manner, using that level of skill and care normally exercised for similar projects under similar conditions by reputable and competent environmental consultants currently practicing in the 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 34 area, and in accordance with the terms and conditions set forth in our contract and Task Order Number 29. Shannon & Wilson and Constellation Services are not responsible for conditions or consequences arising from relevant facts that were concealed, withheld, or not fully disclosed at the time the report was prepared. Also note that the facts and conditions referenced in this report may change over time and that the conclusions set forth here are applicable to the facts and conditions as described only at the time of this report. Conclusions were made within the operative constraints of the scope, budget, and schedule for this project. We believe that the conditions stated here are factual, but no guarantee is made or implied. This report is for the exclusive use of Sound Transit and its representatives. Shannon & Wilson has prepared Appendix G, “Important Information About Your Environmental Site Assessment/Evaluation Report,” to help you and others understand the use and limitations of our reports. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 36 13.0 REFERENCES Associated Earth Sciences, Inc. (AESI), 1986,Subsurface exploration and geotechnical engineering report, Sound Suzuki, Renton, Washington: Report prepared by AESI, Kirkland, Wash., for Sound Suzuki, Renton, Wash., August. ASTM International (ASTM), 2013, Standard practice for environmental site assessments: Phase I environmental site assessment process: West Conshohocken, Penn, ASTM, Standard E1527-13, 35 p. Chicago Title Company of Washington, 2017, ALTA commitment for title insurance, commitment number: 0101946-6 (ROWs RTN001, RTN002, RTN003, RTN004), proposed insured: Central Puget Sound Regional Transit Authority: Prepared by Chicago Title Company of Washington, Seattle, Wash., for Central Puget Sound Regional Transit Authority, Seattle, Wash., June 16. Creative Engineering Options Inc. (CEO), 1999, Geotechnical engineering study, proposed building additions, Sound Ford facility, 750 Rainier Avenue South, Renton, Washington: Report prepared by CEO, Redmond, Wash., for Sound Ford, Renton, Wash., June 17. Environmental Data Resources (EDR), 2017a, EDR historical topo map report, RTN001- RTN004, 200 S Grady Way and 750 Rainier Ave S, Renton, WA 98057: Report prepared by EDR, Shelton, Conn., inquiry no. 5065853.4, for Shannon & Wilson, Inc., Seattle, Wash., October 2. Environmental Data Resources (EDR), 2017b, Certified Sanborn map report, RTN001-RTN004, 200 S Grady Way and 750 Rainier Ave S, Renton, WA 98057: Report prepared by EDR, Shelton, Conn., inquiry no. 5065853.3, for Shannon & Wilson, Inc., Seattle, Wash., October 2. Environmental Data Resources (EDR), 2017c, The EDR aerial photo decade package, RTN001- RTN004, 200 S Grady Way and 750 Rainier Ave S, Renton, WA 98057: Report prepared by EDR, Shelton, Conn., inquiry no. 5065853.9, for Shannon & Wilson, Inc., Seattle, Wash., October 3. Environmental Data Resources (EDR), 2017d The EDR radius map report, RTN001-RTN004, 200 S Grady Way and 750 Rainier Ave S, Renton, WA 98057: Report prepared by EDR, Shelton, Conn., inquiry no. 5065853.2s, for Shannon & Wilson, Inc., Seattle, Wash., October 3. Environmental Data Resources (EDR), 2017e, The EDR-city directory image report, RTN001- RTN004, 200 S Grady Way and 750 Rainier Ave S, Renton, WA 98057: Report prepared by EDR, Shelton, Conn., inquiry no. 5065853.5, for Shannon & Wilson, Inc., Seattle, Wash., October 7. 21-1-16700-281-R1f.docx/wp/aya 21-1-16700-281 37 Golder Applied Technologies, Inc., 1997, Phase I environmental site assessment, Sound Ford, Renton, WA: Report prepared by Golder Applied Technologies, Inc., Redmond, Wash., for Ford Leasing Development Company, Renton, Wash., December 16. HistoryLink, 2017, Essay 2624, Black River disappears in July 1916, available: https://web.archive.org/web/20110621220131/http://www.historylink.org/index.cfm?Displa yPage=output.cfm&File_Id=2624. King County interactive mapping (iMap) system, 2017, available: http://gismaps.kingcounty.gov/iMap/. Mullineaux, D.R., 1965, Geologic map of the Renton quadrangle, King County, Washington: United State Geological Survey, Geologic Quadrangle Map GQ-405, scale 1:24,000. Rittenhouse-Zeman & Associates, Inc. (RZA), 1989, Subsurface petroleum hydrocarbon evaluation, former underground storage tank area, Sound Ford auto dealership, Renton, Washington: Letter report prepared by RZA, Bellevue, Wash., for Sound Ford, Renton, Wash., project no. W-6328, October 4. Snyder, Rich, 2017, Sound Ford facility historical and current operations and features: Personal communication between Rich Snyder, Sound Ford, Renton, Wash., and Dion Valdez, Constellation Services, Maple Valley, Wash., November 13. Swayne, Andy, 2017, Transformer PCB questions: Personal communication between Andy Swayne, Puget Sound Energy, Bellevue, Wash., and Dion Valdez, Constellation Services, Maple Valley, Wash., November 20 and 22. Vickers, Leo, 2017, Sound Ford facility historical and current operations and features: Personal communication between Leo Vickers, Sound Ford, Renton, Wash., and Dion Valdez, Constellation Services, Maple Valley, Wash., November 13 and 14. Wikipedia, 2017, Puget Sound Electric Railway webpage, available: https://en.wikipedia.org/wiki/Puget_Sound_Electric_Railway Washington State Department of Ecology (Ecology), 2013, Model toxics control act regulation and statute: MTCA cleanup regulation, chapter 173-340 WAC; model toxics control act, chapter 70.105D RCW; uniform environmental covenants act, chapter 64.70 RCW (rev.): Olympia, Wash., Washington Dept. of Ecology, Publication no. 94.06, 324 p., available: https://fortress.wa.gov/ecy/publications/summarypages/9406.html. Washington State Department of Ecology (Ecology), 2017, Everett and Tacoma Smelter Search online map, available: https://fortress.wa.gov/ecy/smeltersearch/ TABLE 1LISTED SITES WITH POTENTIAL TO IMPACT SUBJECT PROPERTYSHANNON & WILSON, INC.21-1-16700-281-R1f-T1.xlsx/wp/aya Page 1 of 3 21-1-16700-281List Site Name Address Status (According to EDR)RGA LUST, RGA HWS, ICR, CSCSL, UST, LUST, ALLSITES, RCRA NonGen/NLR, FINDS, ECHO, MANIFESTA1, A2, A6, A8, A10Sound Ford 750 Rainier Avenue S. An ICR was submitted in 1989 relating to petroleum contaminants in soil and groundwater from a tank. Six USTs were removed. Site was listed on the LUST database 1995-2012, and on CSCSL 2009-2011. The current CSCSL database indicates gasoline is confirmed in soil and groundwater; benzene and petroleum-other are confirmed in soil and suspected in groundwater. Status indicates cleanup was started. Facility reported as a RCRA LQG in 1993 and 1994, and as a RCRA NonGen in 2003-2012. No RCRA violations were found. Waste streams consisted of waste paint. Subject PropertyRCRA-CESQG, ALLSITES, FINDS, ECHO, MANIFESTA3 200 S. Grady Way / Walkers Renton Mazda / Walkers Renton Mitsubishi200 S. Grady Way (Note: does not include listings for 200 S.W. Grady Way, which is a different location)Reported as a non-generator in 2005-2008 and as CESQG 2010-2012. No RCRA violations were found. MANIFEST information indicates used motor oil is burned in the shop furnace, motor oil residue and waste coolant is recycled by a service. Subject PropertyHistorical Auto StationA5 Real Sales Inc. 750 Rainier Avenue S. New and used car dealers were present from 1969-1987.Subject PropertyHistorical Cleaners, ALLSITES, RCRA NonGen/NLR, FINDS, ECHO, Inactive DrycleanersB12-B15, D18-D20H B F Inc. / One Hour Martinizing / Renton Village Cleaners53 and 83 S. Grady WayDrycleaners were present from 1977-2012. Mapped by EDR approx. 50 feet south-southwest; actual building location is over 900 feet south.UST, ALLSITES, RCRA NonGen/NLR, FINDS, ECHOC16, C17 Renton Subaru Peugeot / Walkers Renton Subaru Rainier720 Rainier Avenue S. One UST was removed. Facility reported as a RCRA NonGen in 2004. No RCRA violations were found.Adjacent northEDRMap IDApproximate Distance/ Direction From TABLE 1LISTED SITES WITH POTENTIAL TO IMPACT SUBJECT PROPERTYSHANNON & WILSON, INC.21-1-16700-281-R1f-T1.xlsx/wp/aya Page 2 of 3 21-1-16700-281List Site Name Address Status (According to EDR)EDRMap IDApproximate Distance/ Direction From ICR, UST, Financial Assurance, CSCSL, LUST, VCP, ALLSITES, SPILLS, RCRA NonGen/NLR, Historical Auto StationE21-E25, F37USA Petroleum #115 / Mobil #68406 / USA Mini Mart 115765 Rainier Avenue S. Service station has been present since at least 1977. Five USTs were removed, and two are operational. Numerous ICR and groundwater monitoring reports were submitted from 1995-2002. CSCSL indicates benzene and gasoline confirmed in soil and groundwater, and non-halogenated organics confirmed in groundwater. Status indicates cleanup was started, and the facility entered the VCP. A 2009 spill of diesel was reportedly contained. Facility reported as a RCRA NonGen in 1998, 2007, and 2008. No RCRA violations were found.Adjacent westRCRA-SQG, CSCSL, LUST, ALLSITES, SPILLS, FINDS, ECHO, MANIFEST, UST, ICR, SPILLS, Financial Assurance, Historical Auto StationD26-D29 Grady Way Chevron, Chevron #9 9114, Cooks Grady Way Chevron Service Ltd.301 S. Grady Way Service station has been present since at least 1987. Facility reported as a RCRA SQG in 2010-2012, generating ignitable and benzene waste (spill bucket/sump water, filters, and rags). Reported as a RCRA NonGen in 2003-2009. No RCRA violations were found. Six USTs were removed, and three are operational. Numerous ICRs and monitoring reports were submitted from 1991-2002. CSCSL database indicates benzene and gasoline are confirmed in soil and groundwater. Status indicates cleanup has started. Spills of 4 gallons of gasoline in 2001 and 1 gallon of hydraulic oil in 2003 were reported. Adjacent southVCP, ALLSITES, CSCSL NFA, FINDS, ICRC31-C33 Les Schwab Tires Renton 710 Rainier Avenue S. ICRs were submitted in 1998 and 2001 relating to petroleum in soil and groundwater from a tank. Facility entered the VCP and received a CSCSL NFA in 2005.130 feet north TABLE 1LISTED SITES WITH POTENTIAL TO IMPACT SUBJECT PROPERTYSHANNON & WILSON, INC.21-1-16700-281-R1f-T1.xlsx/wp/aya Page 3 of 3 21-1-16700-281List Site Name Address Status (According to EDR)EDRMap IDApproximate Distance/ Direction From Historical Auto Station, UST, VCP, ALLSITES, CSCSL NFA, RCRA NonGen/NLRG34, G36 Renton L-M Inc. (Lincoln-Mercury)201 S. 7th Street Used car dealers were present from 1986-1990. The facility reported as a RCRA LQG in 1993 and 1994, and as a RCRA SQG, CESQG, or NonGen after that time. No RCRA violations were found. Two USTs were removed. The facility entered the VCP and received a CSCSL NFA in 2013.Adjacent northHistorical Cleaner F35 Renton Cleaning Center Renton Shopping Center719 Rainier Avenue Drycleaners were present from 1977-1980. 130 feet northwestCSCSL, LUST, UST, VCP, ALLSITES, ICRK55, K56 Renton 1 / Car Wash Enterprises621 Rainier Avenue S. CSCSL database indicates benzene confirmed in soil and groundwater, non-halogenated solvents remediated in soil and groundwater. Status indicates cleanup was started. Three USTs were removed. Numerous ICRs were submitted from 1191-2002 regarding tank-related petroleum in soil and groundwater.700 feet northNotes:ALLSITES = Information on facilities and sites of interest to the Department of Ecology (Ecology)CESQG = Conditionally Exempt Small Quantity GeneratorCSCSL = Confirmed and Suspected Contaminated Sites ListECHO = Enforcement & Compliance History InformationEDR = Environmental Data Resources, Inc.FINDS = Facility Index System/Facility Registry SystemHSL = Hazardous Sites ListICR = Independent Cleanup ReportINST CONT = Institutional Control Site ListLQG = large quantity generatorLUST = leaking underground storage tankMANIFEST = Hazardous Waste Manifest DataNFA = No Further ActionNonGen/NLR = NonGenerator/No Longer ReportingNPDES = Water Quality Permit System DataRCRA = Resource Conservation and Recovery ActRGA = recovered government archiveSPILLS = Spills reported to Spill Prevention, Preparedness and Response Division, Washington State Department of Ecology (Ecology)SQG = small quantity generatorUST = underground storage tankVCP = Voluntary Cleanup ProgramALLSITES = Facility/Site Identification ListingThis table includes selected information for sites with known or suspected contamination located within approximately ¼ mile upgradient of the subject parcel or within approximately 400 feet in any direction. PROJECT LOCATION 167 405 Railroad Rainier Avenue SS Grady Wa y Renton S 3rd Street 00 LakeAvenue SAvenue SSh a t t u c k S 7th Street 515 Benson Drive SLLVICINITY MAP Bing Map Image adapted from aerial imagery provided by Autodesk Live Maps and Microsoft Bing Maps reprinted with permission from Microsoft Corporation. NOTE December 2017 21-1-16700-281 Filename: J:\211\16700\281\21-1-16700-281 Fig 1 - ic Map - Renton.dwg Date: 11-28-2017 Login: jrsWashingtonProjectLocation 0 5 Sound Ford Property - Phase I ESA Sound Transit ROW #RTN001 Through RTN004 Renton, Washington 0 1,000 2,000 Approximate Scale in Feet FIG. 1 Seattle RTN001RTN002RTN003RTN004167Rainier Avenue SS Grady WayLake Avenue S PROJECTLOCATIONRestaurantWalmart Parking LotMobil StationAuto GlassShopCar Pros IA DealershipSound Ford Dealership otelChevron StationBankSouth RentonPark RideCar Pros yundai DealershipWalker's RentonMazda DealershipLes Schwab TiresFilename: J:\211\16700\281\21-1-16700-281 Fig 2 - Site - Renton.dwg Layout: Site Date: 11-28-2017 Login: jrsSITE AND ADJOININGPROPERTIES MAPFIG. 2FIG. 221-1-16700-281Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTE0160 320Approximate Scale in FeetDecember 2017Sound Ford Property - Phase I ESASound Transit ROW #RTN001 Through RTN004Renton, Washington RTN001167Rainier Avenue SElevator Room with ydraulic Oil ASTB-1Pad-MountedTransformerFormer GasDispenserFormer ASTsin Enclosure:Fresh OilUsed OilATFFormer USTs:2,000 Gal. Gas500 Gal. (ATF 500 Gal. Motor Oil)Former 500 Gal.Waste Oil USTAlignment PitFormer 1,000 Gal.Waste Oil USTPartsO WTrench DrainService ShopWaste Oil ASTShowroomFormer SumpFormer Spray BoothUndercoat RoomFDFDO WB-4Former 1,000 Gal.Waste Oil USTFormer 500 Gal.Waste Oil ASTFormer Machine Shop aultSITE MAP - RTN001FIG. 321-1-16700-281Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTE060 120Approximate Scale in FeetFilename: J:\211\16700\281\21-1-16700-281 Fig 3 - Site - RTN001.dwg Layout: Site Date: 12-05-2017 Login: jrsDecember 2017Sound Ford Property - Phase I ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonBoring Designation and ApproximateLocationUnderground Storage Tank (UST)Aboveground Storage Tank (AST)Existing oistFormer oistOil Water SeparatorFloor DrainB-4LEGENDO WFD RTN002Lake Avenue S Power TransmissionTowersFormer 500 Gal.Waste Oil USTSolvent RecyclerFormer Spray BoothsFormer Floor DrainCurrent Spray BoothsCurrent Mixing RoomFormer oistPost Remnant FormerAlignment PitFormerMixing RoomPaint GunCleaning andSolvent RecyclerFormer OutdoorThinner Barrel StorageBody ShopFormer Spray BoothB-2B-3Filename: J:\211\16700\281\21-1-16700-281 Fig 4 - Site - RTN002.dwg Layout: Site Date: 12-05-2017 Login: jrsSITE MAP - RTN002FIG. 4FIG. 421-1-16700-281Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTE060 120Approximate Scale in FeetDecember 2017Sound Ford Property - Phase I ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonBoring Designation and Approximate LocationUnderground Storage Tank (UST)Existing oistFormer oistLEGENDB-3 SITE MAP - RTN003 AND RTN004FIG. 521-1-16700-281Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTEFilename: J:\211\16700\281\21-1-16700-281 Fig 5 - Site - RTN003-RTN004.dwg Layout: Site Date: 12-05-2017 Login: jrsDecember 2017Sound Ford Property - Phase I ESASound Transit ROW #RTN001 Through RTN004Renton, Washington060 120Approximate Scale in FeetBoring Designation and Approximate LocationTest Pit Designation and Approximate LocationAboveground Storage Tank (AST)LEGENDEB-1EP-1 21-1-16700-281 APPENDIX A SELECTED HISTORICAL RESOURCES (on compact disc) 21-1-16700-281 APPENDIX B SITE PHOTOGRAPHS 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-1 Photo 1: Northwest corner of showroom (view direction is southeast). Parcel RTN001. Photo 2: Transformer outside north wall of showroom (view direction is south). Parcel RTN001. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-2 Photo 3: Rear side of tag attached to transformer. Outside north wall of showroom. Parcel RTN001. Photo 4: Outside northeast corner of service shop (view direction is southwest). Patched pavement in foreground is site of three removed USTs. Enclosure in background (behind wooden shelter) housed three former ASTs. Parcel RTN001. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-3 Photo 5: Interior of AST enclosure (view direction is east). Parcel RTN001. Photo 6: Former gasoline dispenser pad at north end of former AST enclosure (view direction is down toward south). Parcel RTN001. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-4 Photo 7: North end of service shop east wall (view direction is south). Trench drain directed to oil/water separator at south end. Patched pavement in center of photo is site of removed 1,000-gallon waste oil UST. Parcel RTN001. Photo 8: Southeast corner of service shop (view direction is west). Fenced enclosure is site of removed 1,000-gallon waste oil UST. Oil/water separator at south end of trench drain. Parcel RTN001. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-5 Photo 9: Trench drain as viewed from north end of service shop (view direction is south). Parcel RTN001. Photo 10: Trench drain and oil/water separator as viewed from south end of service shop (view direction is north). Parcel RTN001. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-6 Photo 11: Cracked floor surface at south end of oil/water separator in service shop (view direction is south). Parcel RTN001. Photo 12: Sub- floor hoist with stained floor near center of service shop (view direction is west). Parcel RTN001. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-7 Photo 13: Sub- floor apparatus and discarded items in hoist vault (view direction is down). Parcel RTN001. Photo 14: Undercoat room in service shop (view direction is southeast). Walls, floor, and debris appear coated in undercoat material. Parcel RTN001. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-8 Photo 15: Floor drain coated in undercoat material and other debris (view direction is down). Undercoat room in service shop. Parcel RTN001. Photo 16: AST near center of western wall in service shop (view direction is northwest). AST was unmarked but was reportedly used for waste oil. Parcel RTN001. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-9 Photo 17: Elevator hydraulic oil tank (view direction is east). North end of showroom. Parcel RTN001. Photo 18: Southwest corner of Sound Collision Center building (view direction is northeast). Parcel RTN002. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-10 Photo 19: Northeast corner of Sound Collision Center building (view direction is southwest). Drum labeled drive train fluid stored outside. Parcel RTN002. Photo 20: Former thinner barrel storage area to the east of Sound Collision Center building (view direction is east). Parcel RTN002. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-11 Photo 21: Site of removed 500- gallon waste oil UST (view direction is east). West wall of Sound Collision Center building shown in background. Parcel RTN002. Photo 22: Interior of Sound Collision Center body shop (view direction is south). Parcel RTN002. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-12 Photo 23: Painting area at north end of Sound Collision Center (view direction is northeast). Former sub-floor hoist at left, possible sub-floor hoist remnant in foreground, former pit edge in center, spray booths in the background. Photo 24: Mixing room in Sound Collision Center building (view direction is northeast). Paint splatter on floor. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-13 Photo 25: South spray booth in Sound Collision Center building (view direction is east). Parcel RTN002. Photo 26: Paint gun washing area with fresh and used solvent containers and solvent recycler (viewing direction is west). Parcel RTN002. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-14 Photo 27: Southwest corner of vacant “Used Cars” building (view direction is northeast). Parcel RTN003. Photo 28: Northeast corner of vacant “Used Cars” building (view direction is southwest). Parcel RTN003. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-15 Photo 29: Service shop interior of vacant “Used Cars” building (view direction is east). Crawl space access shown at center. Parcel RTN003. Photo 30: Liquids stored inside service shop of vacant “Used Cars” building (view direction is west). Parcel RTN003. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-16 Photo 31: Southwest corner of the Walker Renton Mazda building (view direction is northeast). Parcel RTN003. Photo 32: Northwest corner of the Walker Renton Mazda building (view direction is east). Parcel RTN003. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-17 Photo 33: 500- gallon waste oil AST outside northwest corner of the Walker Renton Mazda building (view direction is southeast). Parcel RTN003. Photo 34: Pavement staining at base of 500-gallon waste oil AST outside northwest corner of the Walker Renton Mazda building (view direction is east). Parcel RTN003. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-18 Photo 35: Service shop interior of the Walker Renton Mazda building (view direction is southwest). Parcel RTN003. Photo 36: Drums of windshield cleaner concentrate and waste oil with filter crusher along south wall of the Walker Renton Mazda service shop (view direction is south). Parcel RTN003. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-19 Photo 37: Storage room at western end of Walker Renton Mazda service shop (view direction is west). Three ASTs from left to right: 500- gallon motor oil, 55-gallon motor oil, 165-gallon transmission fluid. Parcel RTN003. Photo 38: Floor staining at base of transmission fluid AST in Walker Renton Mazda service shop (view direction is west). Parcel RTN003. 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-20 Photo 39: Storage room in western end of Walker Renton Mazda service shop (view direction is north). Stained floor near buckets of wheel bearing grease. Parcel RTN003. Photo 40: View along parcel RTN004 (view direction is east). 21-1-16700-281-R1f-AB.docx 21-1-16700-281 B-21 Photo 41: Transformer on westernmost edge of property (view direction is southwest). Parcel RTN004. 21-1-16700-281 APPENDIX C SITE INSPECTION CHECKLIST Subject:RE: Transformer PCB questions From:Swayne, Andy (andy.swayne@pse.com) To:constellation_dion@yahoo.com; Date:Wednesday, November 22, 2017 6:07 PM Dion – At the SW corner we have a pad-mount switch (green box – no oil), two junction box vaults (J with single or double metal doors in the lids – no oil) and an in-vault transformer (right most box – oil filled – I will need to inquire about any PCB content and let you know). The 12 digits numbers are our ‘grid-numbers’ identifying each vault/equipment. The green lines indicate (schematically) the underground cables connecting the vaults/equipment. As for the transformer at the north side of the showroom building, it is an oil filled unit installed at this site in 2013, grid number 317554-165358 (the 99J849230 & BB3220 numbers are equipment serial numbers). I’m not familiar with the tag you photographed, but I’ve been told that it is related to our original receipt inspection of the transformer from the manufacture (built and received in 1999) and should have been removed following acceptance (with any defects noted on the tag having been corrected/resolved). The tag does not indicate the transformer has ever leaked while it has been in use at this site. This is the only transformer on this site (in addition to the transformer mentioned above) – none of the other transformers on the tag are or have been installed on this site. I will inquire about any PCB content and let you know. I should be able to confirm the PCB information early next week. Finally, we don’t show any PSE vault at the north end of the site. From the picture you provided, I would guess this is actually a water system vault given the type of doors and the round backer remote reader disk on the vault lid. Thought “POWER” is stamped in the concrete lid, it was common ‘back in the day’ to use such lids for other utilities. I do see a spot of what looks like red locate paint (indicating power) at the bottom left corner of the vault, but I also see spots of blue locate paint (indicating water) on two side of the a vault. My guess is that there could be a power line not owned by PSE coming to the vault to power up something in the vault. The vault should be opened to determine just what is in this vault. Best. – Andy Andy Swayne Senior Municipal Liaison Manager, Puget Sound Energy Office: 425-462-3852 Cell: 206-604-5943 PO Box 97034 EST-11W, Bellevue, WA 98009-9734 From: Dion Valdez [mailto:constellation_dion@yahoo.com] Sent: Monday, November 20, 2017 5:19 PM To: Swayne, Andy Subject: Re: Transformer PCB questions << Site map.pdf IMG_5494.JPG IMG_5579.JPG >> Thanks for getting back to me, Andy. Attached is a map of the site that I'm assessing. There is one pad-mounted transformer on the north side of the showroom building there that has a tag on it indicating it leaked (see attached photo of one side of the tag). The numbers on the unit include 6259250 and BB3220 which are indicated at the bottom of the tag, but there are also others listed and it is not clear to me if those are other transformers on this site. I would like to know what this means and to know the PCB status of this unit and the location and status of any others that may be at this property. There is also a pad-mounted box at southwest corner of the site marked with what I understand are coordinates (317497 165806) and I would like to know if that is a transformer or some other kind of electric equipment (and whether it contains PCBs). There is a underground power vault at the north end of the site and I'd like to know if that too contains a transformer (and if so, the PCB status). There is a pipe extending toward a piece cut out of the metal cover (see photo). It looks like the pipe ran aboveground and has had asphalt mounded over it to partially bury it. Does this mean anything to you? It looks kind of makeshift, but I'm not clear what it was for. Thanks for any help you can provide. ...Dion. Dion Valdez, CHMM Constellation Services (subcontractor for Sound Transit) 425-679-1414 21-1-16700-281 APPENDIX D ENVIRONMENTAL DATA RESOURCES REPORT (on compact disc located in Appendix A) 21-1-16700-281 APPENDIX E WASHINGTON DEPARTMENT OF ECOLOGY FILE DOCUMENTS (on compact disc located in Appendix A) 21-1-16700-281 APPENDIX F USER-PROVIDED INFORMATION 21-1-16700-281 APPENDIX G PREVIOUS ASSESSMENT REPORT (on compact disc located in Appendix A) 21-1-16700-281 APPENDIX H IMPORTANT INFORMATION ABOUT YOUR ENVIRONMENTAL SITE ASSESSMENT/EVALUATION REPORT Page 1 of 2 1/2017 SHANNON & WILSON, INC. Geotechnical and Environmental Consultants Dated: Attachment to and part of Report 21-1-16700-281 Date: December 8, 2017 To: Mr. Mark Menard Sound Transit IMPORTANT INFORMATION ABOUT YOUR ENVIRONMENTAL SITE ASSESSMENT/EVALUATION REPORT ENVIRONMENTAL SITE ASSESSMENTS/EVALUATIONS ARE PERFORMED FOR SPECIFIC PURPOSES AND FOR SPECIFIC CLIENTS. This report was prepared to meet the needs you specified with respect to your specific site and your risk management preferences. Unless indicated otherwise, we prepared your report expressly for you and for the purposes you indicated. No one other than you should use this report for any purpose without first conferring with us. No one is authorized to use this report for any purpose other than that originally contemplated without our prior written consent. The findings and conclusions documented in this site assessment/evaluation have been prepared for specific application to this project and have been developed in a manner consistent with that level of care and skill normally exercised by members of the environmental science profession currently practicing under similar conditions in this area. The conclusions presented are based on interpretation of information currently available to us and are made within the operational scope, budget, and schedule constraints of this project. No warranty, express or implied, is made. OUR REPORT IS BASED ON PROJECT-SPECIFIC FACTORS. Our environmental site assessment is based on several factors and may include (but not be limited to): reviewing public documents to chronicle site ownership for the past 30, 40, or more years; investigating the site's regulatory history to learn about permits granted or citations issued; determining prior uses of the site and those adjacent to it; reviewing available topographic and real estate maps, historical aerial photos, geologic information, and hydrologic data; reviewing readily available published information about surface and subsurface conditions;reviewing federal and state lists of known and potentially contaminated sites; evaluating the potential for naturally occurring hazards; and interviewing public officials, owners/operators, and/or adjacent owners with respect to local concerns and environmental conditions. Except as noted within the text of the report, no sampling or quantitative laboratory testing was performed by us as part of this site assessment. Where such analyses were conducted by an outside laboratory, Shannon & Wilson relied upon the data provided and did not conduct an independent evaluation regarding the reliability of the data. CONDITIONS CAN CHANGE. Site conditions, both surface and subsurface, may be affected as a result of natural processes or human influence. An environmental site assessment/evaluation is based on conditions that existed at the time of the evaluation. Because so many aspects of a historical review rely on third party information, most consultants will refuse to certify (warrant) that a site is free of contaminants, as it is impossible to know with absolute certainty if such a condition exists. Contaminants may be present in areas that were not surveyed or sampled, or may migrate to areas that showed no signs of contamination at the time they were studied. Unless your consultant indicates otherwise, your report should not be construed to represent geotechnical subsurface conditions at or adjacent to the site and does not provide sufficient information for construction-related activities. Your report also should not be used following floods, earthquakes, or other acts of nature; if the size or configuration of the site is altered; if the location of the site is modified; or if there is a change of ownership and/or use of the property. INCIDENTAL DAMAGE MAY OCCUR DURING SAMPLING ACTIVITIES. Incidental damage to a facility may occur during sampling activities. Asbestos and lead-based paint sampling often require destructive sampling of pipe insulation, floor tile, walls, doors, ceiling tile, roofing, and other building materials. Shannon & Wilson does not provide for paint repair. Limited repair of asbestos sample locations are provided. However, Shannon & Wilson neither warranties repairs made by our field personnel, nor are we held liable for injuries or damages as a result of those repairs. If you desire a specific form of repair, such as those provided by a licensed roofing contractor, you need to request the specific repair at the time of the proposal. The owner is responsible for repair methods that are not specified in the proposal. Page 2 of 2 1/2017 READ RESPONSIBILITY CLAUSES CAREFULLY. Environmental site assessments/evaluations are less exact than other design disciplines because they are based extensively on judgment and opinion, and there may not have been any (or very limited) investigation of actual subsurface conditions. Wholly unwarranted claims have been lodged against consultants. To limit this exposure, consultants have developed a number of clauses for use in their contracts, reports, and other documents. These responsibility clauses are not exculpatory clauses designed to transfer the consultant's liabilities to other parties; rather, they are definitive clauses that identify where responsibilities begin and end. Their use helps all parties involved recognize their individual responsibilities and take appropriate action. Some of these definitive clauses may appear in this report, and you are encouraged to read them closely. Your consultant will be pleased to give full and frank answers to your questions. Consultants cannot accept responsibility for problems that may develop if they are not consulted after factors considered in their reports have changed, or conditions at the site have changed. Therefore, it is incumbent upon you to notify your consultant of any factors that may have changed prior to submission of the final assessment/evaluation. An assessment/evaluation of a site helps reduce your risk, but does not eliminate it. Even the most rigorous professional assessment may fail to identify all existing conditions. ONE OF THE OBLIGATIONS OF YOUR CONSULTANT IS TO PROTECT THE SAFETY, HEALTH, PROPERTY, AND WELFARE OF THE PUBLIC. If our environmental site assessment/evaluation discloses the existence of conditions that may endanger the safety, health, property, or welfare of the public, we may be obligated under rules of professional conduct, statutory law, or common law to notify you and others of these conditions. The preceding paragraphs are based on information provided by the ASFE/Association of Engineering Firms Practicing in the Geosciences, Silver Spring, Maryland Phase II Environmental Site Assessment Sound Transit Right-of-Way #RTN001 Through #RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington March 9, 2017 Submitted To: Mr. Mark Menard Sound Transit 401 South Jackson Street Seattle, Washington 98104 By: Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, Washington 98103 21-1-16700-301 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-154 i EXECUTIVE SUMMARY Shannon & Wilson has completed a Phase II Environmental Site Assessment for Sound Transit Right-of-Way Numbers RTN001 through RTN004 (the Site), located at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington (Figure 1). RTN001 consists of a showroom and shop building. Sound Ford uses the shop building for auto detailing. RTN002 consists of an auto body shop operated by Sound Ford using the name Sound Collision Center. RTN003 consists of a car sales office, two service garages, and an auto parts office and is occupied by Walker’s Renton Mazda. RTN004 currently is vacant land. This study was conducted with the understanding that Sound Transit plans to acquire the parcels as part of the Interstate Highway 405 (I-405) Bus Rapid Transit project. Prior to this study, a Phase I ESA was completed for the property. Several recognized environmental conditions (RECs) were identified, which include: The long history of auto repair activities on RTN001 and RTN003 and auto body shop activities on RTN002 represent potential sources of localized subsurface contamination from petroleum hydrocarbons and chlorinated and non-chlorinated solvents near and beneath the onsite buildings. Documentation regarding the 1989 removal of underground storage tanks (USTs) at the Site (RTN001 and RTN002) is incomplete and contamination may remain present at the known locations of former USTs. The dispenser pad associated with the former gasoline UST on RTN001 was not removed, and subsurface conditions under the dispenser pad have not been not assessed. In addition, given that not all of the former USTs were initially inventoried, it is possible that unknown USTs remain present on the Site. There is no documentation regarding the 1996/1997 removal of some of the sub-floor hydraulic hoists and associated soils from the buildings on RTN001 and RTN002. Soil contamination was reportedly identified at some of the hoist locations. All sub-floor hoist locations represent potential sources of subsurface contamination from hydraulic oil and possibly polychlorinated biphenyls. The hoist vaults also represent potential conduits for contaminants from products used in those areas to enter the subsurface. Current and former floor drains, trench drains, oil/water separators, and alignment pits on RTN001 and/or RTN002 represent potential conduits for subsurface contamination from products used in those areas. Numerous containers in the service shop on RTN001 may contain unknown substances that need to be characterized and properly disposed of. The former outdoor drum storage area east of the body shop (RTN002) was used to store waste paint thinner that was transferred from smaller containers to drums in that 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-154 ii area. This area represents a potential source of subsurface contamination from chlorinated and non-chlorinated solvents. Discarded items in the crawlspace under the used car building on RTN003 may include items that contain or have released petroleum products or hazardous substances. Releases of waste oil have occurred in the area under and around the waste oil aboveground storage tank (AST) located outside the Walker’s Renton Mazda building on RTN003. The AST represents a potential source of subsurface hydrocarbon and solvent contamination. The former rail line that extended through RTN003 is a potential source of contamination from drips and leaks of fuel and lubricants from engines and rail cars, spills of petroleum products and other hazardous substances transported through the Site, wood preservatives used on railroad ties, and herbicides used for weed control. The former electric railway line along the southern edge of RTN004 represents a potential source of contamination from wood preservatives and herbicides. A Chevron station adjacent to the south of the Site (across S. Grady Way) has had known groundwater contamination approximately 100 feet south of the Site for at least the past 20 years. The groundwater flow direction has been inconsistent but has at times included a northeasterly component. Therefore, the Chevron site represents a potential source of contamination at the Site from petroleum hydrocarbons and benzene, toluene, ethylbenzene, and xylenes (BTEX). To evaluate Site RECs, a direct-push probe was advanced in various locations on the Site. Thirty-seven soil samples and nineteen groundwater samples were collected and analyzed for potential contaminants of concern, including petroleum hydrocarbons; gasoline additives ethylene dibromide, ethylene dichloride, and methyl tert-butyl ether; metals; volatile organic compounds (VOCs); polycyclic aromatic hydrocarbons (PAHs); polychlorinated biphenyls (PCBs); and herbicides. Soil-, diesel-, and oil-range petroleum hydrocarbons were detected above Washington State Department of Ecology’s (Ecology’s) Model Toxics Control Act (MTCA) Method A cleanup criteria in five samples (RTN001-2:9.5, RTN001-5:10.5, RTN001-11:3.0, RTN002-3:4.7, and RTN004-1:5.0). Gasoline-range petroleum hydrocarbons were detected below the MTCA Method A cleanup criteria. PAHs were detected above the MTCA Method A cleanup criteria in one sample (RTN001-11:3.0). VOCs were detected in most of the soil samples analyzed, but these detections were not in exceedance of the established MTCA cleanup criteria. PCBs were detected at two samples (RTN002-3:4.7 and RTN002-4:6.2) below the MTCA cleanup criteria. Where analyzed, barium, chromium, and lead were detected in soil samples below their established MTCA cleanup criteria. Herbicides were not detected in the soil samples analyzed. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-154 iii In groundwater, lube oil-range petroleum hydrocarbons were detected in 8 of the 19 samples analyzed at concentrations that exceeded the MTCA Method A cleanup criterion. Gasoline-range petroleum hydrocarbons were not detected in the groundwater samples analyzed. Total arsenic was detected above the cleanup criteria in 9 of the 19 samples analyzed. Total chromium was detected above the cleanup criteria in 2 of the 19 samples analyzed. Total lead was detected above the cleanup criteria in 2 of the 19 samples analyzed. Dissolved arsenic was detected in 4 of the 19 samples analyzed. VOCs were detected in 13 of the 19 samples analyzed with a concentration of vinyl chloride above the cleanup criteria in one groundwater sample (RTN001-10:GW). Based on analytical results, we offer the following conclusions: Soil contaminated with diesel- and lube oil-range petroleum hydrocarbons above MTCA cleanup criteria was encountered near the northeast portion of the RTN001 service building. This contamination is likely associated with numerous former ASTs and USTs that previously contained automatic transmission fluid and motor oil, two existing waste oil ASTs in and near the building, hydraulic hoists, and shop activities. Contaminated soil above the cleanup criteria is also located near the north end of the RTN002 body shop and at “hotspots” located in the parking lot west of the RTN001 service building, east of the RTN002 body shop, and to the south of RTN004 Walker’s Renton Mazda. Gasoline constituents BTEX were encountered in soil samples located north of the RTN001 service building and near the former gasoline dispenser and USTs. Although these detections are not in excess of the MTCA cleanup criteria, they are an indication that residual contaminated soil may be present in this area. Detectable levels of total petroleum hydrocarbons as diesel (TPH-D) and as oil TPH-O are present in soil at three of the four locations where former USTs were removed. At each of these locations, there was evidence of stained soil and/or hydrocarbon odors within or at the bottom of the fill material of the former excavation. This indicates that there is likely residual contaminated soil still present at RTN001-2, RTN001-4, and RTN001-10. Although TPH-D and TPH-O were not detected at RTN001-3, these contaminants were detected in samples RTN002-1 and RTN002-2 and may likely be associated with the storage and conveyance of waste oil from the garage to the UST. The presence of PAHs was detected in soil samples beneath and near the service (RTN001) and body shop (RTN002) buildings likely associated with automotive related use. It is likely that the detection at RTN004-1 is associated with creosote from treated wood from the former railway line as creosote odors were observed during sampling. It is likely that the presence of PAHs in soil will be encountered at other locations along the former electric railway line along the southern boundary of parcel RTN004. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-154 iv PCBs were detected below the MTCA cleanup criteria in soil in the upper 6 feet at RTN002-3 and RTN002-4. It is likely the presence of PCBs is associated with spills, drips, and leaks from hydraulic oil used at the body shop. Groundwater contaminated with diesel- and lube oil-range petroleum hydrocarbons above the MTCA cleanup criteria was encountered beneath the RTN001 service building and in the north area of the RTN002 body shop. This contamination appears to indicate a plume of groundwater contamination that is migrating southward from the soil contamination source area that is located in the north area of the service building. The plume appears to be bound to the north by RTN001-1, to the east by RTN001-4, to the south by RTN003-2, and to the west by RTN001-11. Elevated concentrations of arsenic, chromium, and lead were detected in groundwater samples beneath and near the RTN001 service building, near the RTN003 used car sales office, and south of the RTN004 Walker’s Renton Mazda building along the former electric railway line. Except for arsenic, these elevated concentrations are present in the total and not the dissolved analytical results. It is common to observe elevated concentrations of the total metals analysis due to the high turbidity in samples collected from a probe rig and not a fully developed monitoring well. Dissolved metals concentrations are likely to be more representative of groundwater conditions as typically only the dissolved metals fraction will migrate through porous media. Elevated concentrations of dissolved arsenic may be due to organic soil- induced oxidation-reduction conditions, as the presence of organic matter was observed during sample collection. Vinyl chloride is present above the MTCA Method A cleanup criteria of 0.20 micrograms per liter (μg/L) in groundwater at RTN001-10 (0.33 μg/L). In accordance with Ecology’s Statistical Guidance for Ecology Site Managers (Ecology, 1992), the following requirements have been met to demonstrate compliance: ʊ The upper 95th percentile confidence limit on the true mean concentration at the Site must be less than the soil cleanup level - upper 95 th confidence limit (0.13 μg/L) does not exceed the MTCA Method A cleanup of 0.20 μg/L. ʊ Less than 10% of the samples can exceed the soil cleanup level – one of the 19 total groundwater samples was detected for vinyl chloride, this detection exceeded the MTCA Method A cleanup level, this calculates to 5.2 percent of the total. ʊ No single sample can be greater than two times the soil cleanup level – the concentration of RTN001-10:GW (0.33 μg/L) is less than two times the MTCA Method A cleanup criteria. Vinyl chloride was not detected at sample locations within the vicinity of RTN001-10, which indicates that the presence of this contaminant is likely isolated and not widespread. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-154 v TABLE OF CONTENTS Page EXECUTIVE SUMMARY ............................................................................................................. i 1.0 INTRODUCTION..................................................................................................................1 1.1 Authorization..............................................................................................................1 1.2 Objective ....................................................................................................................1 2.0 BACKGROUND....................................................................................................................2 2.1 Site Location and Description....................................................................................2 2.2 Previous Studies.........................................................................................................2 2.2.1 2017 Shannon & Wilson Phase I Environmental Site Assessment (ESA)..2 2.2.2 1998 Golder Applied Technologies Phase I Environmental Site Assessment (ESA) Sound Ford Renton, Washington..................................4 3.0 GEOLOGIC AND HYDROGEOLOGIC SETTING.............................................................4 3.1 Geologic Setting.........................................................................................................5 3.2 Site Geology...............................................................................................................5 3.3 Hydrogeology.............................................................................................................6 4.0 FIELD EXPLORATIONS .....................................................................................................6 4.1 Locations....................................................................................................................6 4.2 Soil and Groundwater Sampling................................................................................6 4.3 Analytical Methods....................................................................................................7 4.4 Analytical Results ......................................................................................................8 4.4.1 Soil Results..................................................................................................8 4.4.1.1 Petroleum Hydrocarbons.............................................................9 4.4.1.2 Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX)............9 4.4.1.3 Volatile Organic Compounds (VOCs)........................................9 4.4.1.4 Polycyclic Aromatic Hydrocarbons (PAHs), Polychlorinated Biphenyls (PCBs), and Herbicides............................................10 4.4.1.5 Metals........................................................................................10 4.4.2 Groundwater Results..................................................................................10 4.4.2.1 Petroleum Hydrocarbons...........................................................10 4.4.2.2 Volatile Organic Compounds (VOCs)......................................11 4.4.2.3 Metals/Herbicides .....................................................................11 4.5 Investigation-Derived Waste (IDW)........................................................................11 5.0 CONCLUSIONS..................................................................................................................11 6.0 LIMITATIONS....................................................................................................................13 7.0 REFERENCES.....................................................................................................................15 TABLE OF CONTENTS (cont.) 21-1-16700-301-f.docx/wp/aya 21-1-16700-154 vi TABLES 1 Sampling Summary 2 Summary of Soil Analytical Results 3 Summary of Groundwater Analytical Results FIGURES 1 Vicinity Map 2 Site and Exploration Plan RTN001 3 Site and Exploration Plan RTN002 4 Site and Exploration Plan RTN003 and RTN004 5 Contaminated Soil Locations 6 Contaminated Groundwater Locations APPENDICES A Field Methods and Exploration Logs B Analytical Laboratory Report C Important Information About Your Environmental Site Assessment/Evaluation Report 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 1 PHASE IIENVIRONMENTAL SITE ASSESSMENT SOUND TRANSIT RIGHT-OF-WAY #RTN001 THROUGH #RTN004 SOUND FORD PROPERTY 750 RAINIER AVENUE S.AND 200S.GRADY WAY RENTON,WASHINGTON 1.0 INTRODUCTION 1.1 Authorization Shannon & Wilson completed a Phase II Environmental Site Assessment (ESA) for Sound Transit Right-of-Way Numbers RTN001 through RTN004 located at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington (the Site). The work was conducted in accordance with our proposal dated January 12, 2018, under Sound Transit contract #RTA/AE 0107-14C, Task Order 31. The task order was authorized by Mr. Kevin Workman and Notice to Proceed was provided on January 26, 2018. This study was conducted to assist Sound Transit’s plans to acquire the parcels as part of the Interstate Highway 405 (I-405) Bus Rapid Transit project. 1.2 Objective The objective of this Phase II ESA was to evaluate subsurface soil and groundwater beneath the property to be acquired by Sound Transit as part of the I-405 Bus Rapid Transit project. Our scope of services included the following tasks: Soil and groundwater sampling and analysis. Preparation of this report. The scope of services focused on evaluating the recognized environmental conditions (RECs) identified during the Phase I ESA (Shannon & Wilson, 2017) and identifying and evaluating other potential environmental concerns with significant potential to contaminate the property. The field sampling was a screening-level effort intended to identify potential widespread contamination rather than fully define the lateral or vertical extent of soil and/or groundwater contamination. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 2 2.0 BACKGROUND 2.1 Site Location and Description The Site is located in the northwest quarter of the northeast quarter of Section 19, Township 23 North, Range 5 East of the Willamette Meridian (Figure 1). The parcels that constitute the Site are shown in Figures 2 through 4 and are identified and described as follows: RTN001: 750 Rainier Avenue S., King County tax parcel #192305-9035, consisting of 3.43 acres occupied by a 46,980-square-foot auto showroom and shop building. The showroom portion of the building is vacant and the shop area is used by Sound Ford for auto detailing. RTN002: 750 Rainier Avenue S., King County tax parcel #192305-9063, which consists of 1.98 acres occupied by a 12,260-square-foot auto body shop operated by Sound Ford under the name Sound Collision Center. In addition, three towers for power transmission lines are located in the eastern portion of the Site. RTN003: 200 S. Grady Way, King County tax parcel #192305-9068, consisting of 1.89 acres occupied by a 3,710-square-foot used car sales office and service garage at the western end of the parcel (which is currently vacant) and a 6,360-square-foot auto parts office and service garage at the eastern end (leased and occupied by Walker’s Renton Mazda). RTN004: 200 S. Grady Way, King County tax parcel #192305-9074, which consists of 0.99 acres of vacant land. 2.2 Previous Studies Previous environmental studies were completed on the property, including two Phase I ESAs. Select data (tables and figures) from previous studies are contained in Appendix C. 2.2.1 2017 Shannon & Wilson Phase I Environmental Site Assessment (ESA) Shannon & Wilson completed a Phase I ESA of the subject parcel. The research conducted for this assessment indicates that the Site was first developed with a railroad line and an electric passenger railway line in the early part of the 20th century. From the 1940s to mid-1960s, a barn and a “cycle shop” were present, as well as a possible fruit stand and residences that may have been located offsite. From 1968 to the present, the Site has been occupied by auto dealerships, including service shops and a body shop. Associated facilities have included underground storage tanks (USTs), aboveground storage tanks (ASTs), sub-floor hydraulic hoists, floor drains, trench drains, oil/water separators, alignment pits, and paint spray booths. Products used and stored at the Site have included heating oil, gasoline, fresh and used 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 3 motor oil, automatic transmission fluid, hydraulic oil, paints, and chlorinated and non-chlorinated solvents. The surrounding area was generally rural until the mid-1960s and has been dominated by development of auto-related businesses since that time, including auto dealerships and service stations. Several RECs were identified in the Phase I ESA. They include: The long history of auto repair activities on RTN001 and RTN003 and auto body shop activities on RTN002 represent potential sources of localized subsurface contamination from petroleum hydrocarbons and chlorinated and non-chlorinated solvents near and beneath the onsite buildings. Documentation regarding the 1989 removal of USTs at the Site (RTN001 and RTN002) is incomplete and contamination may remain present at the known locations of former USTs. The dispenser pad associated with the former gasoline UST on RTN001 was not removed, and subsurface conditions under the dispenser pad have not been not assessed. In addition, given that not all of the former USTs were initially inventoried, it is possible that unknown USTs remain present on the Site. There is no documentation regarding the 1996/1997 removal of some of the sub-floor hydraulic hoists and associated soils from the buildings on RTN001 and RTN002. Soil contamination was reportedly identified at some of the hoist locations. Sub-floor hoist locations represent potential sources of subsurface contamination from hydraulic oil and possibly polychlorinated biphenyls (PCBs). The hoist vaults also represent potential conduits for contaminants from products used in those areas to enter the subsurface. Current and former floor drains, trench drains, oil/water separators, and alignment pits on RTN001 and/or RTN002 represent potential conduits for subsurface contamination from products used in those areas. Numerous containers in the service shop on RTN001 may contain unknown substances that need to be characterized and properly disposed of. The former outdoor drum storage area east of the body shop (RTN002) was used to store waste paint thinner that was transferred from smaller containers to drums in that area. This area represents a potential source of subsurface contamination from chlorinated and non-chlorinated solvents. Discarded items in the crawlspace under the used car building on RTN003 may include items that contain or have released petroleum products or hazardous substances. Releases of waste oil have occurred in the area under and around the waste oil AST located outside the Walker’s Renton Mazda building on RTN003. The AST represents a potential source of subsurface hydrocarbon and solvent contamination. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 4 The former rail line that extended through RTN003 is a potential source of contamination from drips and leaks of fuel and lubricants from engines and rail cars, spills of petroleum products and other hazardous substances transported through the Site, wood preservatives used on railroad ties, and herbicides used for weed control. The former electric railway line along the southern edge of RTN004 represents a potential source of contamination from wood preservatives and herbicides. 2.2.2 1998 Golder Applied Technologies Phase I Environmental Site Assessment (ESA) Sound Ford Renton, Washington The results of the 1998 Phase I ESA (Golder Applied Technologies, 1998) indicate that the potential for environmental impact associated with the Sound Ford business operations exists. Potential environmental impacts identified are associated with the following: Seven former USTs were located in the service department that contained motor oil, waste oil, automatic transmission oil, lube oil, and gasoline and were known to have impacted the soil; removal documentation or a cleanup report were not available; The presence of 18 in-ground hydraulic lifts, several were found to have impacted the surrounding soils during removal; removal documentation of the lifts was not available; The presence of two active 1,000-gallon oil/water separators located in the service area; and The presence of four leaking underground storage tank (LUST) sites located adjacent or in close proximity to the Sound Ford dealership. The Golder Phase I ESA also summarized a previous environmental investigation that includes a report by Rittenhouse-Zeman and Associates Inc., regarding the investigation of soil associated with the removal of USTs. This report concluded that soil and possibly groundwater had been impacted and the recommendation for the implementation of a groundwater monitoring program was made. According to the owner, another site assessment report was completed as part of a financial transaction, but that report was not available at the time of the Golder Phase IESA. 3.0 GEOLOGIC AND HYDROGEOLOGIC SETTING This section describes the general geologic setting of the Site vicinity and discusses the subsurface conditions. The geologic and hydrogeologic summaries below are based on a review of geologic documents and Shannon & Wilson’s environmental explorations conducted at the Site. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 5 3.1 Geologic Setting The Site is located in the Puget Sound Lowland, which is a topographic depression bounded by the Cascade Mountains to the east and the Olympic Mountains to the west. It is typically characterized by deep bedrock (over 1,000 feet) and complicated, thick sequences of sediments deposited by repeated glaciations that moved back and forth across the region over 10,000 years ago. The Site lies within an approximately 1-mile-wide valley that is the former floodplain of the Black River. The Black River previously received discharge from the Cedar River and Lake Washington, and flowed westward to join the Green River and discharge into the Duwamish River (HistoryLink, 2017). The Cedar River was channelized and diverted into Lake Washington in 1912, and flow to the Black River ceased in 1916 when the discharge from Lake Washington was rerouted to the north through the newly constructed Lake Washington Ship Canal. A geologic map of the Renton Quadrangle indicates that the Site vicinity is underlain by alluvium, consisting primarily of sand and gravel, with thin beds of silt, clay, and peat in some areas (Mullineaux, 1965). 3.2 Site Geology Soil classification during the probe explorations was based on field observations alone. Soil descriptions are presented in the exploration geoprobe logs in Appendix A. Subsurface conditions encountered during field investigation included fill underlain by fine-grained native soils. Based on field observations, fill is generally 1 to 2 feet thick across most of the Site with the exception of the southeast corner where fill is 5 to 6 feet thick. In probes located within former UST tank excavations, fill thickness was about 6 to 9 feet. Native soil units encountered at the Site are consistent with alluvium and low-energy lacustrine deposits of the Cedar River floodplain and the historic Lake Washington shoreline. These soil units contain variability consisting of poorly graded sand, poorly graded sand with silt, silty sand, and silt with sand. Peat and organic silt were encountered in the southern end of the property at RTN003 and RTN004. Gravel was encountered beneath the service and body shop building as part of the fill and subbase of the building slabs. More sandier soil units were encountered at the bottom of probe explorations within the buildings whereas silt was encountered at the bottom of probe locations outside of the buildings. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 6 3.3 Hydrogeology Based on the flat topography and the locations of the Cedar River to the east and the Green River to the west, the direction of groundwater flow in the Site is difficult to estimate. Groundwater flow direction may fluctuate in response to precipitation and other factors, including variability of subsurface lithology due to former meandering of the Black River, subsurface utilities, fill, and buried structures. However, based on the information reviewed in the Phase I ESA (Shannon & Wilson, 2017), it appears that the Site may be situated on or near a groundwater divide and shallow groundwater beneath the Site is inferred to flow generally toward the southwest and southeast. Based on field observations, depth to groundwater is approximately 7 to 12 feet below ground surface (bgs). Due to the variability in the permeability of the soil units, isolated perched groundwater may be present at the Site. Since groundwater depths were observed from temporary well screens and not fully developed monitoring wells, groundwater flow direction was not definitively determined during field explorations. 4.0 FIELD EXPLORATIONS 4.1 Locations Shannon & Wilson observed the advancement of 19 direct-push probes on the Site from February 7 to 10, 2018. The purpose of each location, exploration, sampling depths, and selected analytical testing for each sample is provided in Table 1. Prior to sampling, APS Locates, under subcontract to Shannon & Wilson, completed private utility location services in the vicinity of proposed explorations. Environmental Services Network Northwest, under subcontract to Shannon & Wilson, used a direct-push hydraulic probe rig to complete the probes. With the exception of RTN001-9 that was advanced to 20 feet bgs, the probes were advanced to 15 feet bgs. Thirteen of the probes were completed with a Geoprobe™ 7800 and due to height restraints in the body shop building, six of the probes were completed with a difficult-access Powerprobe™ 9100. Exploration logs, which indicate soil classifications and estimated depths to water, can be found in Appendix A. 4.2 Soil and Groundwater Sampling A total of 37 soil samples and 19 groundwater samples were collected from the Site. Up to two soil samples were collected from each location. Soil samples were taken at the apparent soil-water interface and/or at depths at which visual, olfactory, and/or photoionization detector 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 7 indication of contamination were observed. Olfactory and visual field indications of contamination (hydrocarbon and/or creosote odors and dark staining) were observed at RTN001-2, RTN001-4, RTN001-5, RTN001-7, RTN001-10, RTN002-3, RTN002-4, and RTN004-1. Groundwater samples were also collected from the geoprobe locations. Temporary 1-inch-diameter polyvinyl chloride wells with a 10-foot screen were installed at the selected geoprobe locations. Groundwater samples were collected once groundwater was mostly clear and approximately three well volumes were purged from the temporary wells. The temporary wells were removed following sampling and the probe hole was backfilled with bentonite chips and finished with either asphalt or concrete. 4.3 Analytical Methods Analytical methods were selected based on the RECs identified in the previous Phase I ESA, the former and present use of the Site, and to support investigation-derived waste (IDW) disposal characterization. The potential contaminants of concern for the Site are gasoline, diesel- and lube oil-range petroleum hydrocarbons, volatile organic compounds (VOCs), metals, and herbicides. Samples were submitted to OnSite Environmental, Inc. in Redmond, Washington, for chemical analysis. Selected soil samples were analyzed by the following methods: Hydrocarbon Identification using Northwest Total Petroleum Hydrocarbon (NWTPH) Method NWTPH-HCID. Gasoline-range hydrocarbons using Method NWTPH-Gx. Diesel- and oil-range hydrocarbons using Method NWTPH-Dx. Model Toxics Control Act (MTCA) 5 metals (arsenic, cadmium, chromium, lead, and mercury) by U.S. Environmental Protection Agency (EPA) Method 6000/7000. Resource Conservation and Recovery Act (RCRA) 8 metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver) by EPA Method 6000/7000 series. Copper, nickel, and zinc by EPA 6000 series. VOCs by EPA Method 8260C with ethylene dibromide, 1,2-dichloroethane, and methyl tert-butyl ether. Chlorinated acid herbicides by EPA Method 8151A. Since levels of oil-range hydrocarbons were detected, 19 samples were analyzed for polycyclic aromatic hydrocarbons (PAHs) and PCBs by EPA Method 8270D/SIM and EPA 8082A, 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 8 respectively. These samples were selected to further the environmental investigation and support disposal characterization of waste generated during the field explorations. Groundwater samples were analyzed by the following methods: Hydrocarbon Identification (NWTPH-HCID) Gasoline-range hydrocarbons using Method NWTPH-Gx. Diesel- and oil-range hydrocarbons using Method NWTPH-Dx. Total or dissolved MTCA-5 and RCRA-8 metals by EPA Method 200.8/7470A. Total and dissolved Priority Pollutant Metals by EPA Method 200.8/7470A (antimony, arsenic, barium, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, thallium, and zinc). VOCs by EPA Method 8260C. Chlorinated acid herbicides by EPA Method 8151A. Select groundwater samples were analyzed for total and dissolved lead based on location and potential contamination sources from Site use. Other select groundwater samples were analyzed for copper, nickel, and zinc to support disposal characterization. 4.4 Analytical Results Tables 2 and 3 provide summaries of detected analytical soil and groundwater results and include MTCA Method A and B criteria (Ecology, 2013 and 2016). The analytical laboratory reports are presented in Appendix B. 4.4.1 Soil Results The soil analytical results are presented in Table 2 and the contaminants detected are summarized below. Where no criterion is established under MTCA Method A for a parameter, MTCA Method B values are used. An overview of contaminated soil locations encountered in the explorations is presented in Figure 5. In general, soil samples that exceed the cleanup criteria are located within the existing service building, in the parking lot to the west of the service building, in the parking lot to the east of the body shop, and to the south of Walker’s Renton Mazda showroom and service building. The following contaminants were detected in soil: 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 9 4.4.1.1 Petroleum Hydrocarbons TPH-G was detected below the MTCA Method A cleanup criteria in one of the samples analyzed at RTN001-2:9.5 that is in the vicinity of the former gasoline UST north of the service building. TPH-D was detected in seven of the soil samples analyzed. Sample detections ranged from 39 to 3,900 milligrams per kilogram (mg/kg). However, one of the samples analyzed (RTN001-2:9.5) had a reporting limit above the MTCA Method A cleanup criterion of 2,000 mg/kg due to high concentrations of lube oil-range petroleum hydrocarbons in the sample. The location that exceeded the cleanup criteria is north of the service building near the former USTs. TPH-O was detected in 19 of the soil samples analyzed. Sample detections ranged from 62 to 28,000 mg/kg. The sum of total diesel- and oil-range hydrocarbons in soil, where detected, are above the MTCA Method A criterion of 2,000 mg/kg in five soil samples (RTN001-2:9.5, RTN001-5:10.5, RTN001-11:3.0, RTN002-3:4.7, and RTN001-4:5.0). These exceedances are located within and to the north of the service building, in the parking lot west of the service building, and in the parking lot east of the body shop building. 4.4.1.2 Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) BTEX was detected below the MTCA cleanup criteria at location RTN001-1 and RTN001-2, which is near the former gasoline USTs that are north of the existing service building. The following BTEX contaminants were detected: ʊ Benzene was detected at RTN001-2:9.5 at 0.0016 mg/kg, below its MTCA Method A criteria of 0.3 mg/kg. ʊ Ethylbenzene was detected in RTN001-2:9.5 at 0.16 mg/kg, below its MTCA Method A criterion of 6 mg/kg. ʊ m, p-Xylene was detected in one of the soil samples (RTN001-2:9.5) analyzed at 0.26 mg/kg. The detection is below the MTCA Method A criterion of 9 mg/kg. ʊ o-Xylene was detected in two of the soil samples analyzed (RTN001-1:6.0 and RTN001-2:9.5) at concentrations of 0.0011 and 0.013 mg/kg respectively. These detections are below the MTCA Method A criterion of 9 mg/kg. 4.4.1.3 Volatile Organic Compounds (VOCs) Where analyzed, VOCs that include 1,2,4-trimethylbenzene, 1,2-dichlorobenzene, 1,3,5-trimethylbenzene, 2-butanone, acetone, carbon disulfide, isopropylbenzene, naphthalene, n-butylbenzene, n-propylbenzene, and p-isopropyltoluene were detected below the applicable MTCA Method A or B cleanup criteria. A summary of the VOCs detections is presented in Table 2. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 10 4.4.1.4 Polycyclic Aromatic Hydrocarbons (PAHs), Polychlorinated Biphenyls (PCBs), and Herbicides PAHs were detected in ten of the samples analyzed. Sample detections ranged from 0.0069 to 0.34 mg/kg. Individual PAH concentrations did not exceed the MTCA Method A or Method B cleanup criteria. The total toxicity equivalency factor concentration of the carcinogenic PAH mixture was above MTCA Method A criteria of 0.1 mg/kg in one sample RTN001-11:3.0. PCBs were detected in two of the samples analyzed (RTN002-3:4.7 and RTN002-4:6.2) at concentrations of 0.74 and 0.57 mg/kg, respectively. These detections are below the MTCA Method A cleanup criteria of 1 mg/kg. Herbicides were not detected in the four samples analyzed. 4.4.1.5 Metals Various metals were detected in each of the samples analyzed below their applicable MTCA cleanup criteria. These metals include barium, chromium, copper, lead, nickel, and zinc. A summary of the metals detections is presented in Table 2. 4.4.2 Groundwater Results The groundwater analytical results are presented in Table 3 and the contaminants detected are summarized below. Where no criterion is established under MTCA Method A for a parameter, MTCA Method B values are used. An overview of contaminated soil locations encountered in the explorations is presented in Figure 6. In general, groundwater samples that exceed the cleanup criteria are located beneath and to the north, east, and south of the service building. Exceedances are also located beneath and to the north of the body shop and south of the Walker’s Renton Mazda showroom and service building. The following contaminants were detected in groundwater: 4.4.2.1 Petroleum Hydrocarbons TPH-D was detected in ten groundwater samples analyzed. Sample detections ranged from 280 to 3,300 micrograms per liter (μg/L). TPH-O was detected in eight of the samples analyzed. Sample detections ranged from 540 to 16,000 μg/L. The sum of total diesel-, and oil- range hydrocarbons range from 750 μg/L to 19,300 μg/L. Eight groundwater samples exceeded MTCA Method A cleanup criteria for the sum of diesel- and oil- range petroleum hydrocarbons. These exceedances are located in the service and body shop areas. 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 11 4.4.2.2 Volatile Organic Compounds (VOCs) Where analyzed, VOCs, including acetone, n-propylbenzene, 1,2,4-trimethylbenzene, 1,3,5-trimethylbenzene, methyl tert-butyl ether, and naphthalene were detected in the samples analyzed. None of these detected concentrations exceed the MTCA Method B cleanup criteria. Vinyl chloride was detected in one of the samples analyzed (RTN001-12:GW) at a concentration of 0.33 μg/L that is above the MTCA Method A cleanup criteria of 0.20 μg/L. This vinyl chloride exceedance is located south of the service building near the former AST and UST. 4.4.2.3 Metals/Herbicides Total arsenic was detected in nine of the groundwater samples analyzed. Sample detections ranged from 8.4 to 150 μg/L. These nine detections are above the MTCA Method A criterion of 5 μg/L. Exceedances of arsenic are located in the service and body shop areas and to the south of the Walker’s Renton Mazda showroom and service building. Total chromium was detected in six groundwater samples analyzed. Sample detections ranged from 12 to 310 μg/L. Two of these detections are above the MTCA Method A criterion of 50 μg/L (RTN001-2:GW and RTN004-1:GW). Total lead was detected in eight of the groundwater samples analyzed. Sample detections ranged from 1.2 to 2,500 μg/L. Two sample detections exceed the MTCA Method A cleanup criteria of 15 μg/L (RTN002-1:GW and RTN004-1:GW). Dissolved arsenic was detected in seven groundwater samples analyzed. Sample detections ranged from 4.8 to 30 μg/L. Seven of these detections exceed the MTCA Method A cleanup criterion of 5 μg/L. Herbicides were not detected in the two samples analyzed. 4.5 Investigation-Derived Waste (IDW) IDW generated during sampling included soil cuttings, decontamination fluids, purge water, used personal protective equipment (PPE), and disposable sampling equipment. Soil cuttings, decontamination fluids, and purge water were contained in labeled Washington State Department of Transportation-approved drums and are temporarily stored in the first bay at the northwest corner of the service building. PPE and disposable sampling equipment were placed in doubled plastic bags and disposed of as solid waste. The IDW drums are pending waste profile characterization for disposal. 5.0 CONCLUSIONS Based on the data collected for this Phase II ESA, we offer the following conclusions for the RTN001, RTN002, RTN003, and RTN004 properties: 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 12 Soil contaminated with diesel- and lube oil-range petroleum hydrocarbons above MTCA cleanup criteria was encountered near the northeast portion of the RTN001 service building. This contamination is likely associated with numerous former ASTs and USTs that previously contained automatic transmission fluid and motor oil, two existing waste oil ASTs in and near the building, hydraulic hoists, and shop activities. Contaminated soil above the cleanup criteria is also located near the north end of the RTN002 body shop, and at “hotspots” located in the parking lot west of the RTN001 service building, east of the RTN002 body shop, and to the south of RTN004 Walker’s Renton Mazda. Gasoline constituents BTEX were encountered in soil samples located north of the RTN001 service building and near the former gasoline dispenser and USTs. Although these detections are not in excess of the MTCA cleanup criteria, they are an indication that residual contaminated soil may be present in this area. Detectable levels of TPH-D and TPH-O are present in soil at three of the four locations where former USTs were removed. At each of these locations, there was evidence of stained soil and/or hydrocarbon odors within or at the bottom of the fill material of the former excavation. This indicates that there is likely residual contaminated soil still present at RTN001-2, RTN001-4, and RTN001-10. Although TPH-D and TPH-O were not detected at RTN001-3, these contaminants were detected in samples RTN002-1 and RTN002-2 and may likely be associated with the storage and conveyance of waste oil from the garage to the UST. The presence of PAHs was detected in soil samples beneath and near the service (RTN001) and body shop (RTN002) buildings likely associated with automotive-related use. It is likely that the detection at RTN004-1 is associated with creosote from treated wood from the former railway line, as creosote odors were observed during sampling. It is likely that the presence of PAHs in soil will be encountered at other locations along the former electric railway line along the southern boundary of parcel RTN004. PCBs were detected below the MTCA cleanup criteria in soil in the upper 6 feet at RTN002-3 and RTN002-4. It is likely the presence of PCBs is associated with spills, drips, and leaks from hydraulic oil used at the body shop. Groundwater contaminated with diesel- and lube oil-range petroleum hydrocarbons above the MTCA cleanup criteria was encountered beneath the RTN001 service building and in the north area of the RTN002 body shop. This contamination appears to indicate a plume of groundwater contamination that is migrating southward from the soil contamination source area that is located in the north area of the service building. The plume appears to be bound to the north by RTN001-1, to the east by RTN001-4, to the south by RTN003-2, and to the west by RTN001-11. Elevated concentrations of arsenic, chromium, and lead were detected in groundwater samples beneath and near the RTN001 service building, near the RTN003 used car sales office, and south of the RTN004 Walker’s Renton Mazda building along the 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 13 former electric railway line. Except for arsenic, these elevated concentrations are present in the total and not the dissolved analytical results. It is common to observe elevated concentrations of the total metals analysis due to the high turbidity in samples collected from a probe rig and not a fully developed monitoring well. Dissolved metals concentrations are likely to be more representative of groundwater conditions as typically only the dissolved metals fraction will migrate through porous media. Elevated concentrations of dissolved arsenic may be due to organic soil-induced oxidation-reduction conditions as the presence of organic matter was observed during sample collection. Vinyl chloride is present above the MTCA Method A cleanup criteria of 0.20 μg/L in groundwater at RTN001-10 (0.33 μg/L). In accordance with Ecology’s Statistical Guidance for Ecology Site Managers (Ecology, 1992), the following requirements have been met to demonstrate compliance: ʊ The upper 95th percentile confidence limit on the true mean concentration at the Site must be less than the soil cleanup level - upper 95 th confidence limit (0.13 μg/L) does not exceed the MTCA Method A cleanup of 0.20 μg/L. ʊ Less than 10% of the samples can exceed the soil cleanup level – one of the 19 total groundwater samples was detected for vinyl chloride, this detection exceeded the MTCA Method A cleanup level, this calculates to 5.2% of the total. ʊ No single sample can be greater than two times the soil cleanup level – the concentration of RTN001-10:GW (0.33 μg/L) is less than two times the MTCA Method A cleanup criteria. Vinyl chloride was not detected at sample locations within the vicinity of RTN001-10, which indicates that the presence of this contaminant is likely isolated and not widespread. 6.0 LIMITATIONS Within the limitations of scope, schedule, and budget, Shannon & Wilson has prepared this report in a professional manner, using the level of skill and care normally exercised for similar projects under similar conditions by reputable and competent environmental consultants currently practicing in this area. The scope of services was intended to address only those environmental concerns with significant potential to result in contamination of the Site. The sampling effort was considered limited in extent and served as a screening effort only. It was not intended to define the lateral or vertical extent of soil and/or groundwater contamination. The data presented in this report are based on limited research and sampling at the Site and should be considered representative at the time of our observations. Other areas of 21-1-16700-301-R1f.docx/wp/aya 21-1-16700-301 15 7.0 REFERENCES Golder Applied Technologies, Inc., 1998, Phase I environmental site assessment, Sound Ford, Renton, WA: Report prepared by Golder Applied Technologies, Inc., Redmond, Wash., for Ford Leasing Development Company, Renton, Wash., December 16. HistoryLink, 2017, Essay 2624, Black River disappears in July 1916, available: https://web.archive.org/web/20110621220131/http://www.historylink.org/index.cfm?Displa yPage=output.cfm&File_Id=2624. Mullineaux, D.R., 1965, Geologic map of the Renton quadrangle, King County, Washington: United State Geological Survey, Geologic Quadrangle Map GQ-405, scale 1:24,000. Shannon & Wilson, Inc. (Shannon & Wilson), 2017, Phase I environmental site assessment, Sound Transit Right-of-Way #RTN001 through RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington: Report prepared by Shannon & Wilson, Seattle, Wash., for Sound Transit, Seattle, Wash., 21-1-16432-281, December 8. Washington State Department of Ecology (Ecology), 2013, Model toxics control act regulation and statute: MTCA cleanup regulation, chapter 173-340 WAC; model toxics control act, chapter 70.105D RCW; uniform environmental covenants act, chapter 64.70 RCW (rev.): Olympia, Wash., Washington Dept. of Ecology, Publication no. 94.06, 324 p., available:https://fortress.wa.gov/ecy/publications/SummaryPages/9406.html Washington State Department of Ecology (Ecology), 2016, Cleanup levels and risk calculation (CLARC): Available:https://fortress.wa.gov/ecy/clarc/CLARCHome.aspx, accessed February. Washington State Department of Ecology (Ecology), 1992. Statistical Guidance for Ecology Site Managers: Olympia, Wash, Washington State Department of Ecology, Toxics Cleanup Program, Publication no. 92-54,August. TABLE 1 SAMPLING SUMMARYSHANNON & WILSON, INC.LocationPurpose of ExplorationRCRA 8 MetalsMTCA 5 Metals PPL Metals LeadCu, Ni, ZnTCLP Gx HCID DxEDB, EDC, MTBE VOCsPCBs PAHs Herbicides6X XXXX12.5 X X X X XGW total & diss X X X X9.5 X X X X X X X13XXXXXXGW total & diss X X X X5X X XXX8X X XXXGW total & diss X X X X6X X XXXXX12 X X X X X X XGW total & diss X X X X6.5XXXX10.5 X X X X XGWXX5X X XXX12 X X X X X X XGW total & diss X X X X7XXXX11 X X X XGW total & diss X X X10XXGWXX5XXXX12 X X X XGW total & diss X X X5.5 X X X X X X X12 X X X X X X XGW total & diss X X X X3X XXXXX11 X X X X X XGW total & diss X X X4XXXX10.5XXGWXX4XX X7.5XX XGWXX X4.7XX X9XXGWXX X5XX6.2 X X X XGWXXRTN001-315 feetRTN001-715 feetRTN001-2Northeast corner of the service shop15 feet RTN001-4Evaluate potential for onsite contamination associated with the former gas dispenser, and former ASTs.Evaluate potential for onsite contamination associated with 3 former USTs.Northwest corner of the body shop.Evaluate potential for onsite contamination associated with a former 300-gallon UST.RTN001-615 feetEvaluate potential for onsite contamination associated with existing waste oil AST. Sample DepthSelected AnalysisExploration DesignationExploration DepthRTN001-8Inside service shop south near former spray boothEvaluate potential for onsite contamination associated with the former spray booth and undercoat room. 15 feetRTN001-1Northeast corner of the service shop15 feetRTN001-5Inside service shop north Evaluate potential for onsite contamination associated with former hydraulic lifts. 15 feet15 feetEast of the service shopEvaluate potential for onsite contamination associated with a former 1,000-gallon UST.Inside service shop west wall near existing ASTInside service shop south along existing trench drainRTN001-11Southwest parking lotEvaluate lateral extent of potential onsite contamination associated with service shop use. 15 feetRTN001-9Southeast corner of service shopEvaluate potential for onsite contamination associated with oil/water separator. 20 feetRTN001-10South of service shopEvaluate potential for onsite contamination associated with former 500-gallon waste oil AST and former 1,000-gallon UST.15 feet15 feetRTN002-2Inside body shop north central.Evaluate potential for onsite contamination associated with the paint gun cleaning and solvent recycler and the former hoist, alignment pit and mixing room. 15 feetEvaluate potential for onsite contamination associated with the existing trench drain. RTN002-3East of the body shopEvaluate potential for onsite contamination associated with the former outdoor thinner barrel storage.15 feetRTN002-4Inside body shop southeast cornerEvaluate potential for onsite contamination associated with the former spray booth. 15 feetRTN002-1Inside body shop northwest corner.Evaluate potential for onsite contamination associated with the solvent recycler and former spray booth and floor drain. 21-1-16700-301-R1f-T1.xlsx/wp/ayaPage 1 of 2 21-1-16700-301 TABLE 1 SAMPLING SUMMARYSHANNON & WILSON, INC.LocationPurpose of ExplorationRCRA 8 MetalsMTCA 5 Metals PPL Metals LeadCu, Ni, ZnTCLP Gx HCID DxEDB, EDC, MTBE VOCsPCBs PAHs HerbicidesSample DepthSelected AnalysisExploration DesignationExploration Depth4X X XXXXX9X X XXXGWXXXX4.5 X X X X X X8X XXXXGWtotal & diss X X X X5XX X X12.5XX XGWXXX5X XXXXX8X XXXXXGW total & diss X X X X XNotes:Copper, nickel, and zinc (Cu, Ni, and Zn) analyses was requested to support waste disposal facility acceptance. AST = aboveground storage tankdiss = dissolvedDx = Northwest Total Petroleum Hydrocarbons as Diesel-extended (NWTPH-Dx)EDB = ethylene dibromideEDC = ethylene dichlorideGW = groundwaterGx = Northwest Total Petroleum Hydrocarbons as Gasoline (NWTPH-Gx)HCID = Hydrocarbon IdentificationMTBE = methyl tert-butyl etherMTCA 5 = Model Toxics Control Act 5 metals (arsenic, cadmium, chromium, lead, mercury) PAHs = polynuclear aromatic hydrocarbonsPCBs = polychlorinated biphenylsPPL = priority pollutant list RCRA = Resource Conservation and Recovery Act 8 metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver)TCLP = Toxicity Characteristic Leachate ProcedureUST = underground storage tankVOCs = volatile organic compoundsRTN004-1South of Walker's Renton Mazda building near S. Grady WayEvaluate potential for onsite contamination associated with former electric railway line. 15 feetRTN003-1Northwest corner of Walker's Renton Mazda buildingEvaluate potential for onsite contamination associated with existing ASTs. 15 feetRTN003-2Northwest corner of the former used car sales office.Evaluate potential for onsite contamination associated with the former service shop of the used car sales building. 15 feetRTN003-3East of Walker's Renton Mazda building near wash bayEvaluate potential for onsite contamination associated with wash bay. 15 feet21-1-16700-301-R1f-T1.xlsx/wp/ayaPage 2 of 2 21-1-16700-301 TABLE 2SUMMARY OF SOIL ANALYTICAL RESULTS Exploration Designation:Sample NumberSample Depth (feet)Date SampledAnalytical Report NumberPetroleum Hydrocarbons (mg/kg)Gasoline Range Organics 7.4 U 6.9 U246.8 U 6.2 U 6.8 U 4.4 U 9.3 U NA NA 8.5 U 7.0 U 6.0 U 6.1 U NA 4.1 U 8.7 U 100/30* --Diesel Range Organics 37 U 33 U 2800 U 150 U 33 U 34 U 290 U 36 U240 390036 U3931 U 32 U 37 U 28 U 37 U 2,000 --Lube Oil Range Organics 74 U 66 U16000 63067 U 68 U2000 180 1700 2800073 U9662 U 64 U 75 U10073 U 2,000 --MTCA-5/RCRA-8 Metals (mg/kg)Arsenic 15 U 13 U 11 U NA 13 U 14 U 11 U 15 U NA NA 15 U 14 U NA NA NA NA NA 20 24Barium NA NA NA NA100 85 51 84NA NA130 75NA NA NA NA NA -- 16,000Cadmium 0.74 U 0.66 U 0.55 U NA 0.66 U 0.68 U 0.57 U 0.73 U NA NA 0.73 U 0.68 U NA NA NA NA NA280Chromium46 40 21NA47 43 29 37NA NA52 42NA NA NA NA NA19/2,000* 80Copper NA NA NA NA NA NA NA NA NA14NA NA NA NA NA NA NA-- 120,000Lead 7.4 U 6.6 U13NA8.66.8 U197.3 U NA NA176.8 U 6.2 U 6.4 U NA8.27.3 U250--Mercury 0.37 U 0.33 U 0.28 U NA 0.33 U 0.34 U 0.29 U 0.36 U NA NA 0.36 U 0.34 U NA NA NA NA NA 2 --Nickel NA NA NA NA NA NA NA NA NA20NA NA NA NA NA NA NA -- 1,600Selenium NA NA NA NA 13 U 14 U 11 U 15 U NA NA 15 U 14 U NA NA NA NA NA -- 400Silver NA NA NA NA 1.3 U 1.4 U 1.1 U 1.5 U NA NA 1.5 U 1.4 U NA NA NA NA NA -- 400Zinc NA NA NA NA NA NA NA NA NA40NA NA NA NA NA NA NA -- 24,000Carcinogenic Polycyclic Aromatic Hydrocarbons (PAHs) (mg/kg)Benz[a]anthracene NA NA 0.15 U 0.0081 U NA NA 0.076 U 0.0097 U 0.041 U 0.16 U NA 0.0091 U NA NA NA 0.0074 U NA -- --Benzo(a)pyrene NA NA 0.15U 0.0081 U NA NA 0.076 U 0.0097 U 0.041 U 0.079 U NA 0.0091 U NA NA NA0.026NA 0.10 --Benzo(b)fluoranthene NA NA 0.15 U 0.0081 U NA NA 0.076 U 0.0097 U 0.041 U 0.079 U NA 0.0091 U NA NA NA0.042NA -- --Benzo(j,k)fluoranthene NA NA 0.15 U 0.0081 U NA NA 0.076 U 0.0097 U 0.041 U 0.079 U NA 0.0091 U NA NA NA0.0082NA -- --Chrysene NA NA0.300.0081 U NA NA 0.076 U 0.0097 U 0.041 U 0.16 U NA 0.0091 U NA NA NA0.013NA -- --Dibenzo(a,h)anthracene NA NA 0.15 U 0.0081 U NA NA 0.076 U 0.0097 U 0.041 U 0.079 U NA 0.0091 U NA NA NA 0.0074 U NA -- --Indeno(1,2,3-cd)pyrene NA NA0.15 U 0.0081 U NA NA 0.076 U 0.0097 U 0.041 U 0.079 U NA 0.0091 U NA NA NA0.022NA -- --TEF-adjusted cPAHsNA NA0.0400.010U NA NA 0.069 U 0.0088 U 0.037 U 0.076 U NA 0.0082 U NA NA NA0.035NA 0.10 --Volatile Organic Compounds (mg/kg)Acetone0.056 0.0540.0049 U0.18 0.061 0.068 0.0096 0.16 0.0520.33 U0.015 0.037 0.0055 0.017 0.027 0.047 0.21-- 72,0002-Butanone0.0061 0.00590.0049 U0.031 0.014 0.0170.0052 U0.025 0.00680.33 U 0.0066 U0.00880.0054 U 0.0049 U 0.0052 U0.0060 0.0270-- 48,0001,2,4-Trimethylbenzene 0.0011 U 0.00091 U3.4 0.00360.0011 U 0.0011 U 0.0010 U 0.0015 U0.0063 1.20.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U -- --1,2-Dichlorobenzene0.0011 U 0.00091 U 0.062 U 0.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U0.0026 0.300.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U -- --1,3,5-Trimethylbenzene 0.0011 U 0.00091 U0.820.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U0.00150.066 U 0.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U -- --Benzene 0.0011 U 0.00091 U0.00160.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U 0.001 U 0.066 U 0.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U 0.03 320Ethylene dibromide (EDB) 0.0011 U 0.00091 U 0.00097 U 0.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U 0.001 U 0.066 U 0.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U 0.005 7201,2-Dichloroethane (EDC) 0.0011 U 0.00091 U 0.00097 U 0.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U 0.001 U 0.066 U 0.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U -- 480Methyl t-Butyl Ether (MTBE) 0.0011 U 0.00091 U 0.00097 U 0.0012 U 0.0011 U 0.0011 U 0.001 U 0.0015 U 0.001 U 0.066 U 0.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U 0.1 --Ethylbenzene 0.0011 U 0.00091 U0.160.0012 U 0.0056 U 0.0055 U 0.0010 U 0.0015 U 0.0051 U 0.33 U 0.0066 U 0.0053 U 0.0054 U 0.0049 U 0.0052 U 0.00087 U 0.0017 U 6 8000m, p-Xylene 0.0055 U 0.0045 U0.260.0059 U 0.0056 U 0.0055 U 0.0052 U 0.0077 U0.0051 U 0.33 U 0.0066 U 0.0053 U 0.0054 U 0.0049 U 0.0052 U 0.0044 U 0.0085 U 9 16,000Naphthalene 0.0011 U 0.00091 U1.00.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U 0.0010 U 0.066 U 0.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U 5 1,600n-Butylbenzene 0.0011 U 0.00091 U 0.062 U 0.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U0.0018 0.360.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U -- 4,000n-Propylbenzene 0.0011 U 0.00091 U0.570.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U 0.001 U 0.066 U 0.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U -- 8,000o-Xylene0.00110.00091 U0.0130.0012 U0.0056 U 0.0055 U 0.0010 U 0.0015 U 0.0051 U 0.33 U 0.0066 U 0.0053 U 0.0054 U 0.0049 U 0.0052 U 0.00087 U 0.0017 U 9 16,000p-Isopropyltoluene 0.0011 U 0.00091 U 0.062 U 0.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U 0.001 U0.170.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U -- --Isopropylbenzene 0.0011 U 0.00091 U0.0170.0012 U 0.0011 U 0.0011 U 0.0010 U 0.0015 U 0.001 U 0.066 U 0.0013 U 0.0011 U 0.0011 U 0.00097 U 0.001 U 0.00087 U 0.0017 U -- 8,000Polychlorinated Biphenyls (PCBs) (mg/kg)PCB-aroclor 1016 NA NA 0.055 U 0.060 U NA NA 0.057 U 0.073 U 0.062 U 0.059 U NA 0.068 U NA NA NA 0.056 U NAPCB-aroclor 1221 NA NA 0.055 U 0.060 U NA NA 0.057 U 0.073 U 0.062 U 0.059 U NA 0.068 U NA NA NA 0.056 U NAPCB-aroclor 1232 NA NA 0.055 U 0.060 U NA NA 0.057 U 0.073 U 0.062 U 0.059 U NA 0.068 U NA NA NA 0.056 U NAPCB-aroclor 1242 NA NA 0.055 U 0.060 U NA NA 0.057 U 0.073 U 0.062 U 0.059 U NA 0.068 U NA NA NA 0.056 U NAPCB-aroclor 1248 NA NA 0.055 U 0.060 U NA NA 0.057 U 0.073 U 0.062 U 0.059 U NA 0.068 U NA NA NA 0.056 U NAPCB-aroclor 1254 NA NA 0.055 U 0.060 U NA NA 0.057 U 0.073 U 0.062 U 0.059 U NA 0.068 U NA NA NA 0.056 U NAPCB-aroclor 1260 NA NA 0.055 U 0.060 U NA NA 0.057 U0.073 U 0.062 U 0.059 U NA 0.068 U NA NA NA 0.056 U NANotes:mg/kg = milligrams per kilogram * = cleanup criteria is 100 mg/kg when benzene is not present. Cleanup criteria is 30 mg/kg when benzene is present. ** Cleanup criteria is 19 mg/kg for chromium (VI) and 2,000 mg/kg for chromium (III). -- = MTCA cleanup criteria not established for this analyteMTCA = Model Toxics Control ActNA = not analyzedRCRA = Resource Conservation and Recovery ActTEF = Toxicity Equivalency FactorRTN001-1 RTN001-2 RTN001-3 RTN001-4 RTN001-52/8/20184. shaded values indicate a detection above the applicable MTCA cleanup level 3. Bold values indicate a detection above the laboratory reporting limit.1NEMTCA Method B Noncancer Soil Cleanup Levels (mg/kg)RTN001-3:5.02/9/2018RTN001-1:6.02/8/2018 2/8/20182/7/2018 2/8/20181. U = the analyte was not detected above the laboratory reporting limit.2/8/20182/8/2018 2/9/2018ANALYTE1802-076 1802-076 1802-076 1802-099 1802-099 1802-0762/8/201852/7/20188613MTCA Method A Soil Cleanup Levels (mg/kg)RTN001-6 RTN001-8RTN001-8:10.032/8/20181802-099RTN001-9:5.09.52/7/20181802-0762/8/201812RTN001-9:12.01802-099RTN001-7:11.09.52/7/20181802-076RTN001-92/8/2018 2/8/2018RTN001-7:7.0RTN001-6:12.0711RTN001-75. only detected VOCs are shown.1802-099 1802-0991802-076 1802-099 1802-099 1802-0992. All soil sample results are expressed in milligrams per kilogram (mg/kg).1802-076RTN001-5:10.5 RTN001-6:5.0RTN001-2:13.06 12.5 9.5 13RTN001-1:12.5 RTN001-2:9.56.5RTN001-4:6.0RTN001-3:8.0 RTN001-4:12.0 RTN001-5:6.510.5 5Page 1 of 321-1-16700-301 TABLE 2 SUMMARY OF SOIL ANALYTICAL RESULTSSHANNON & WILSON, INC.Exploration Designation:Sample NumberSample Depth (feet)Date SampledAnalytical Report NumberPetroleum Hydrocarbons (mg/kg)Gasoline Range Organics 9.7 U 7.4 U 5.2 U 10 U NA NA 4.2 U 6.4 U 26 U 28 U 22 U 27 U 5.1 U 100/30* --Diesel Range Organics 52 U 180 U65040 U 28 U 35 U 28 U 32 U170071 U 54 U7228 U 2,000 --Lube Oil Range Organics290 530 2300 140 6771 U7065 U2500140 U 110 U220 3402,000 --MTCA-5/RCRA-8 Metals (mg/kg)Arsenic 16U14U12U16UNANANANANANANANA 11U20 24Barium140 110NA NA NA NA NA NA NA NA NA NA62-- 16,000Cadmium 0.81 U 0.72 U 0.59 U 0.79 U NA NA NA NA NA NA NA NA 0.56U280Chromium45 42 27 46NA NA NA NA NA NA NA NA4419/2,000* 80Copper NA NA NA NA NA NA NA NA NA NA NA940NA --120,000Lead44 13 647.9UNANANANANANANANA5.6U250 --Mercury 0.41 U 0.36 U 0.29 U 0.40 U NA NA NA NA NA NA NA NA 0.28 U 2 --Nickel NA NA NA NA NA NA NA NA NA NA NA210NA -- 1,600Selenium 16 U 14 U NA NA NA NA NA NA NA NA NA NA 11 U -- 400Silver 1.6U1.4UNANANANANANANANANANA1.1U--400Zinc NA NA NA NA NANA NA NA NA NA NA1600NA -- 24,000Carcinogenic Polycyclic Aromatic Hydrocarbons (PAHs) (mg/kg)Benz[a]anthracene 0.022 U 0.0096 U 0.16 U 0.011 U 0.0074 U NA 0.0075 U NA0.037NA NA 0.0091 U 0.0074 U -- --Benzo(a)pyrene 0.022 U 0.0096 U 0.16 U 0.011 U 0.0074 U NA 0.0075 U NA0.031NA NA 0.0091 U 0.0074 U 0.10 --Benzo(b)fluoranthene 0.022 U 0.0096 U 0.16 U 0.011 U 0.0074 U NA 0.0075 U NA0.044NA NA 0.0091 U 0.0074 U -- --Benzo(j,k)fluoranthene 0.022 U 0.0096 U 0.16 U 0.011 U 0.0074 U NA 0.0075 U NA0.015NA NA 0.0091 U 0.0074 U -- --Chrysene0.031 0.010 0.340.011 U0.062NA0.0076NA0.056NA NA 0.0091 U0.021-- --Dibenzo(a,h)anthracene 0.022 U 0.0096 U 0.16 U 0.011 U0.0074 U NA 0.0075 U NA0.0089NA NA 0.0091 U 0.0074 U -- --Indeno(1,2,3-cd)pyrene 0.022 U 0.0096 U 0.16 U 0.011 U 0.0074 U NA 0.0075 U NA0.029NA NA 0.0091 U 0.0074 U -- --TEF-adjusted cPAHs0.020 0.086 0.140.010 U0.0073NA NA NA0.047NA NA 0.0082 U0.00690.10 --Volatile Organic Compounds (mg/kg)Acetone0.10 0.075 0.14 0.15 0.0053 0.11 0.099 0.058 0.036 0.045 0.023 0.300.0047 U -- 72,000Ethylene dibromide (EDB) 0.0011 U 0.0012 U 0.00088 U 0.0018 U 0.00085 U 0.0011 U 0.0007 U 0.0012 U 0.00084 U 0.0011 U 0.00077 U 0.0012 U 0.00095 U 6 8,0001,2-Dichloroethane (EDC) 0.0011 U 0.0012 U 0.00088 U 0.0018 U 0.00085 U 0.0011 U 0.0007 U 0.0012 U 0.00084 U 0.0011 U 0.00077 U 0.0012 U 0.00095 U 6 8,000Methyl t-Butyl Ether (MTBE)0.0011 U 0.0012 U 0.00088 U 0.0018 U 0.00085 U 0.0011 U 0.0007 U 0.0012 U 0.00084 U 0.0011 U 0.00077 U 0.0012 U 0.00095 U 0.1 6,4002-Butanone0.016 0.013 0.02 0.0250.0042 U0.026 0.014 0.00940.0042 U 0.0055 U 0.0038 U0.0520.0047 U 0.1 0.1Carbon Disulfide 0.0011 U 0.0012 U 0.00088 U 0.0018 U 0.0011 U 0.0015 U 0.001 U 0.0012 U0.00380.0011 U 0.00077 U0.00240.00095 U -- 8,000Naphthalene 0.12 U 0.0012 U 0.065 U 0.0018 U 0.00085 U 0.0011 U0.00430.0012 U 0.00084 U 0.0011 U 0.00077 U 0.084 U 0.00095 U 5 160Polychlorinated Biphenyls (PCBs) (mg/kg)PCB-aroclor 1016 0.081 U 0.072 U 0.059 U 0.079 U 0.055 UNA0.056 UNA0.064 UNA NA0.068 U 0.056 UPCB-aroclor 1221 0.081 U 0.072 U 0.059U 0.079 U 0.055 UNA0.056 UNA0.064 UNA NA0.068 U 0.056 UPCB-aroclor 1232 0.081 U 0.072 U 0.059 U 0.079 U 0.055 UNA0.056 UNA0.064 UNA NA0.068 U 0.056 UPCB-aroclor 1242 0.081 U 0.072 U 0.059 U 0.079 U 0.055 UNA0.056 UNA0.064 UNA NA0.068 U 0.056 UPCB-aroclor 1248 0.081 U 0.072 U 0.059 U 0.079 U 0.055 UNA0.056 UNA0.064 UNA NA0.068 U 0.056 UPCB-aroclor 1254 0.081 U 0.072 U 0.059 U 0.079 U 0.055 UNA0.056 UNA0.74NA NA0.570.056 UPCB-aroclor 1260 0.081 U 0.072 U 0.059 U 0.079 U 0.055 UNA0.056 UNA0.24NA NA0.110.056 UNotes:mg/kg = milligrams per kilogram * = cleanup criteria is 100 mg/kg when benzene is not present. Cleanup criteria is 30 mg/kg when benzene is present. ** Cleanup criteria is 19 mg/kg for chromium (VI) and 2,000 mg/kg for chromium (III). -- = MTCA cleanup criteria not established for this analyteMTCA = Model Toxics Control ActNA = not analyzedRCRA = Resource Conservation and Recovery ActTEF = Toxicity Equivalency FactorMTCA Method A Soil Cleanup Levels (mg/kg)RTN002-1 RTN002-2RTN002-3:9.058RTN002-3RTN001-10:5.5 RTN001-10:12.0 RTN001-11:3.0RTN001-10 RTN001-116 6.5RTN001-11:11.0 RTN002-1:4.0131110.5 5 12 71802-0762/9/2018 2/9/2018 2/9/2018MTCA Method B Soil Cleanup Levels (mg/kg)2/7/20182/9/20182/7/2018 2/7/2018 2/7/2018 2/8/2018 2/8/2018RTN002-1:10.5 RTN002-2:4.0 RTN002-2:7.5 RTN002-3:4.71--1. U = the analyte was not detected above the laboratory reporting limit.2. All soil sample results are expressed in milligrams per kilogram (mg/kg).3. Bold values indicate a detection above the laboratory reporting limit.RTN003-1RTN002-4:6.2112/9/20181802-116RTN002-4RTN002-4:5.0112/9/20181802-1165. only detected VOCs are shown.RTN003-1:4.0112/9/20181802-1164. shaded values indicate a detection above the applicable MTCA cleanup1802-116 1802-099 1802-099ANALYTE1802-076 1802-076 1802-076 1802-099 1802-099 1802-116Copy of 21-1-16700-301-R1f-T2.xlsx/wp/ayaPage 2 of 321-1-16700-301 TABLE 2SUMMARY OF SOIL ANALYTICAL RESULTSExploration Designation:Sample NumberSample Depth (feet)Date SampledAnalytical Report NumberPetroleum Hydrocarbons (mg/kg)Gasoline Range Organics 8.7 U 5.5 U 6.7 U 26 U 25 U 5.4 U 5.9 U 100/30* --Diesel Range Organics 38 U 32 U 34 U 66 U 64 U180^ 31 U 2,000 --Lube Oil Range Organics 76 U 64 U 68 U 130 U 130 U2000^622,000 --MTCA-5/RCRA-8 Metals (mg/kg)Arsenic 15U 13U 14U NA NA 12U 12U 20 7Barium110NA NA NA NA NA NA -- 16,000Cadmium 0.76 U 0.63 U 0.68 U NA NA 0.59 U 0.62 U280Chromium51 37 42NA NA42 4219/2,000* 120,000Lead 7.6 U 6.3 U 6.8 U NA NA23 7250 --Mercury 0.38 U 0.32 U 0.34 U NA NA 0.29 U 0.31 U 2 --Selenium 15UNANANANANANA--400Silver 1.5 U NA NA NA NA NA NA -- 400Carcinogenic Polycyclic Aromatic Hydrocarbons (PAHs) (mg/kg)Benz[a]anthracene NA NA NA NA NA0.0380.0083 U -- --Benzo(a)pyrene NA NA NA NA NA0.0260.0083 U 0.10 --Benzo(b)fluoranthene NA NA NA NA NA0.0400.0083 U -- --Benzo(j,k)fluoranthene NA NA NA NA NA0.00990.0083 U -- --Chrysene NA NA NA NA NA0.0600.0083 U -- --Dibenzo(a,h)anthracene NA NA NA NA NA0.0080.0083 U -- --Indeno(1,2,3-cd)pyrene NA NA NA NA NA0.0210.0083 U -- --TEF-adjusted cPAHsNA NA NA NA NA0.0410.0075 U 0.10 --Volatile Organic Compounds (mg/kg)Acetone0.0430.0048 U0.11 0.099 0.051 0.10 0.14-- 72,000Carbon Disulfide 0.0013 U 0.00096 U 0.0011 U 0.00096 U 0.00095 U0.00220.0014 U -- 8,0002-Butanone 0.0063 U 0.0048 U0.020 0.016 0.0083 0.019 0.026-- 48,000p-Isopropyltoluene 0.0013 U 0.00096 U 0.0011 U 0.00096 U 0.00095 U0.00140.077 U * 8,000Ethylene dibromide (EDB) 0.0013 U 0.00096 U 0.0011 U 0.00096 U 0.00095 U 0.00079 U 0.0009 U 6 8,0001,2-Dichloroethane (EDC) 0.0013 U 0.00096 U 0.0011 U 0.00096 U 0.00095 U 0.00079 U 0.0009 U 6 8,000Methyl t-Butyl Ether (MTBE) 0.0013 U 0.00096 U 0.0011 U 0.00096 U 0.00095 U 0.00079 U 0.0009 U 0.1 6,400Naphthalene 0.0013 U 0.00096 U 0.0011 U 0.00096 U 0.00095 U0.00870.0083 U 5 160PCB-aroclor 1016 NA NA NA NA NA 0.059 U 0.062 UPCB-aroclor 1221 NA NA NA NA NA 0.059 U 0.062 UPCB-aroclor 1232 NA NA NA NA NA 0.059 U 0.062 UPCB-aroclor 1242 NA NA NANA NA 0.059 U 0.062 UPCB-aroclor 1248 NA NA NA NA NA 0.059 U 0.062 UPCB-aroclor 1254 NA NA NA NA NA 0.059 U 0.062 UPCB-aroclor 1260 NA NA NA NA NA 0.059 U 0.062 UChlorinated Acid HerbicidesNANDNAND ND ND ND-- --Notes:mg/kg = milligrams per kilogram ^ = constitutes an exceedance of the cleanup criteria based on the sum of diesel- and lube oil-range hydrocarbons.* = cleanup criteria is 100 mg/kg when benzene is not present. Cleanup criteria is 30 mg/kg when benzene is present. ** Cleanup criteria is 19 mg/kg for chromium (VI) and 2,000 mg/kg for chromium (III). -- = MTCA cleanup criteria not established for this analyteMTCA = Model Toxics Control ActNA = not analyzedND = not detected RCRA = Resource Conservation and Recovery ActTEF = Toxicity Equivalency FactorRTN003-1 RTN003-2 RTN003-3RTN003-1:9.0 RTN003-2:4.5 RTN003-2:8.0 RTN003-3:12.5ANALYTE6136.51802-116 1802-116 1802-116 1802-1162/9/2018 2/9/20182/9/201813 5 81802-116 1802-116 1802-116MTCA Method B Soil Cleanup Levels (mg/kg)2/9/2018 2/9/2018 2/9/2018 2/9/2018MTCA Method A Soil Cleanup Levels (mg/kg)RTN004-110.5RTN003-3:5.0 RTN004-1:5.0 RTN004-1:8.05. only detected VOCs are shown.1NEPolychlorinated Biphenyls (PCBs) (mg/kg)1. U = the analyte was not detected above the laboratory reporting limit.2. All soil sample results are expressed in milligrams per kilogram (mg/kg).3. Bold values indicate a detection above the laboratory rep4. shaded values indicate a detection above the applicable MPage 3 of 321-1-16700-301 TABLE 3SUMMARY OF GROUNDWATER ANALYTICAL RESULTSSHANNON & WILSON, INC.Exploration Designation:Sample NumberDate SampledAnalytical Report NumberANALYTEPetroleum Hydrocarbons Gasoline Range Organics 100 U 100 U 100 U 100 U NA 100 U 100 U NA 100 U 100 U 100 U NA 100 U 110 U 1,000/800* --Diesel Range Organics 270 U 290 U320270 U3300 970 820 480 280 420290 U640 410 300500 --Lube Oil Range Organics 430 U2800440 U 430 U16000 1800 540 590440 U740460 U1200 570450 U 500 --MTCA-5, RCRA-8, PPL Metals - Total Antimony NA NA NA NA NA NA 5.6 U NA NA NA NA NA NA NA -- 6.4Arsenic56 22 15 23NA 3.3 U13NA NA17 26NA NA NA 5 4.8Barium NA NA42 74NA38NA NA NA55NA NA NA NA -- 3,200Beryllium NANA NA NA NA NA 11 U NA NA NA NA NA NA NA -- 32Cadmium 4.4 U 4.4 U 4.4 U 4.4 U NA 4.4 U 4.4 U NA NA 4.4 U 4.4 U NA NA NA 5 8Chromium12 17011 U14NA 11 U20NA NA 11 U 11 U NA NA NA 50 --Copper NANANANANANA18NA NA NA NA NA NA NA -- 640Lead1.8 251.1 U6.3NA 1.1 U2.5NA4.4 1.9 1.2NA NA NA 15 --Mercury 0.50 U 0.50 U 0.50 U 0.50 U NA 0.50 U 0.50 U NA NA 0.50 U 0.50 U NA NA NA 2 --Nickel NA NA NA NA NA NA 22 U NA NANA NA NA NA NA -- 320Selenium NA NA 5.6 U 5.6 U NA 5.6 U 5.6 U NA NA 5.6 U NA NA NA NA -- 80Silver NA NA 11 U 11 U NA 11 U 11 U NA NA 11 U NA NA NA NA -- 80Thallium NA NA NA NA NA NA 5.6 U NA NA NA NA NA NA NA --0.16Zinc NA NA NA NA NA NA 28 U NA NA NA NA NA NA NA -- 4,800MTCA-5, RCRA-8, PPL Metals - DissolvedAntimony NA NA NA NA NA NA 5.0 U NA NA NA NA NA NA NA -- 6Arsenic303.0 U13 15NA 3.0 U6.4NA NA7.3 4.8NA NA NA 5 4.8Barium NA NA 25 U 25 U NA 25U NA NA NA 25 U NA NA NA NA -- 3,200Beryllium NA NA NA NA NA NA 10 U NA NA NA NA NA NA NA -- 32Cadmium 4.0 U 4.0 U 4.0 U 4.0 U NA 4.0 U 4.0 U NA NA 4.0 U 4.0 U NA NA NA 5 8Chromium 10 U 10 U 10 U 10 U NA 10 U 10 U NA NA 10 U 10 U NA NA NA 50 --Copper NA NA NA NA NA NA 10 U NA NA NA NA NA NA NA -- 640Lead 1.0 U 1.0 U 1.0 U 1.0 U NA 1.0 U 1.0 U NA 1.0 U 1.0 U 1.0 U NA NA NA 15 --Mercury 0.50 U 0.50 U 0.50 U 0.50 U NA0.50 U 0.50 U NA NA 0.50 U 0.50 U NA NA NA 2 --Nickel NA NA NA NA NA NA 20 U NA NA NA NA NA NA NA -- 320Selenium NA NA 5.0 U 5.0 U NA 5.0 U 5.0 U NA NA 5.0 U NA NA NA NA -- 80Thallium NA NA NA NA NA NA 5.0 U NA NA NA NA NA NA NA -- 80Silver NA NA 10 U 10 U NA 10 U 10 U NA NA 10 U NA NA NA NA -- 0.16Zinc NA NA NA NA NA NA 25 U NA NA NA NA NA NA NA -- 4,800Volatile Organic Compounds (μg/L)Acetone 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U 5.0 U30 7.05.0 U 5.0 U 5.0 U -- 7,200Ethylene dibromide (EDB) 0.00097 U 0.010 U 0.0096 U 0.0097 U 0.0097 U 0.20 U 0.20 U 0.200 U 0.20 U 0.20 U 0.20 U 0.20 U NA 0.20 U 0.010 72Methyl t-Butyl Ether (MTBE) 0.20 U 0.20 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.200 U0.280.20 U 0.20 U 0.20 U NA 0.20 U20 --1,2-Dichloroethane (EDC) 0.20 U 0.20 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U NA 0.20 U548Ethylbenzene 0.20 U0.800.20 U 0.20 U 0.20 0.20 U 0.20 U 0.20 U 0.20 U 0.20U 0.20 U 0.20 U 0.20 U 0.20 U700 800m, p-Xylene 0.40 U1.40.40 U 0.40 U1.20.40 U 0.40 U 0.40 U 0.40 U 0.40 U 0.40 U 0.40 U0.640.40 Uo-Xylene 0.20 U0.280.20 U 0.20 U1.00.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U0.250.20 Un-Propylbenzene 0.20 U0.560.20 U 0.20 U0.260.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U-- 8001,3,5-Trimethylbenzene 0.20 U0.240.20 U 0.20 U0.980.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U-- 801,2,4-Trimethylbenzene 0.20 U3.00.20 U 0.20 U6.2 0.33 0.230.20 U0.20 U 0.20 U 0.20 U0.26 0.290.20 U-- --Naphthalene 1.0 U1.81.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 160 160Vinyl Chloride 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U0.330.20 U 0.20 U 0.20 U 0.2 U 0.2 24Notes:* = cleanup criteria is 1,000 μg/L when benzene is not present. Cleanup criteria is 800 μg/L when benzene is present. -- = MTCA cleanup criteria not established for this analyteMTCA = Model Toxics Control ActNA = not analyzedRCRA = Resource Conservation and Recovery Act1,000 1,600RTN001-1RTN001-1:GW2/8/2018RTN001-3RTN001-3:GW2/9/2018RTN001-2RTN001-2:GW2/8/20181802-099 1802-076RTN001-4 RTN001-7RTN001-6RTN001-5RTN001-7:GW2/8/2018RTN001-4:GW2/7/2018RTN001-5:GW2/8/20181802-099 1802-099RTN002-1RTN001-9RTN001-9:GW2/7/2018RTN001-8RTN001-8:GW RTN001-10:GWRTN001-102/7/2018RTN001-11:GW2/7/2018RTN001-6:GW2/8/2018 2/8/20181802-076 1802-076 1802-099 1802-076 1802-099MTCA Method A Cleanup Levels (μg/L)MTCA Method B Cleanup Levels (μg/L)1802-076 1802-076 1802-099 1802-116 1802-099RTN002-3RTN002-3:GW2/9/2018RTN001-11 RTN002-2RTN002-2:GW2/9/2018RTN002-1:GW2/8/20181. U = the analyte was not detected above the laboratory reporting limit.2. All groundwater sample results are expressed in micrograms per liter (μg/L)3. Bold values indicate a detection above the laboratory reporting limit.4. shaded values indicate a detection above the applicable MTCA cleanup level μg/L = micrograms per liter5. only detected VOCs are shown.21-1-16700-301-R1f-T3.xlsx/wp/ayaPage 1 of 2 21-1-16700-301 TABLE 3SUMMARY OF GROUNDWATER ANALYTICAL RESULTSExploration Designation:Sample NumberDate SampledAnalytical Report NumberANALYTEPetroleum Hydrocarbons Gasoline Range Organics 100 U 100 U 100 U 0.11 U 100 U 1,000/800 --Diesel Range Organics 260 U 260 U 260 U 260 U 270 U 500 --Lube Oil Range Organics 420 U 420 U 420 U 420 U 430 U 500 --MTCA-5, RCRA-8, PPL Metals - Total Antimony NA NA 5.6 U NA NA -- 6Arsenic NA NA8.4NA15054.8Beryllium NA NA 11 U NA NA -- 32Cadmium NA NA 4.4 U NA 5.20 5 8Chromium NA NA35NA31050 --Copper NA NA32NA NA -- 640Lead NA NA11NA250015 --Mercury NA NA 0.50 U NA0.702--Nickel NA NA29NA NA -- 320Selenium NA NA 5.6 U NA NA -- 80Silver NA NA11 U NA NA -- 80Thallium NA NA 5.6 U NA NA -- 0.16Zinc NA NA67NA NA -- 4,800MTCA-5, RCRA-8, PPL Metals - DissolvedAntimony NA NA 5.0 U NA NA -- 6Arsenic NA NA 3.0 U NA2054.8Beryllium NA NA 10 U NA NA -- 32Cadmium NA NA 4.0 U NA 4.0 U 5 8Chromium NA NA 10 U NA 10 U 50 --Copper NA NA 10 U NA NA -- 640Lead NA NA 1.0 U NA1.115 --Mercury NA NA 0.50 U NA 0.5 U 2 --Nickel NA NA 20 U NA NA -- 320Selenium NA NA 5.0 U NA NA -- 80Thallium NA NA 5.0 U NA NA -- 80Silver NA NA 10 U NA NA --0.16Zinc NA NA 25 U NA NA -- 4,800Volatile Organic Compounds (μg/L)Carbon disulfide 0.20 U 0.20 U 0.20 U 0.20 U0.26-- 800m, p-Xylene0.490.40 U0.590.40 U 0.40 U1,000 1,600o-Xylene 0.20 U 0.20 U0.220.20 U 0.20 U1,000 1,600n-Propylbenzene 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U-- 8001,3,5-Trimethylbenzene 0.20 U 0.20 U 0.20 U 0.20 U 0.20 U-- 801,2,4-Trimethylbenzene 0.20 U 0.20 U0.30 0.210.20 U-- --Chlorinated Acid HerbicidesNA NAND ND ND^^Notes:* = cleanup criteria is 1,000 μg/L when benzene is not present. Cleanup criteria is 800 μg/L when benzene is present. -- = MTCA cleanup criteria not established for this analyte^ = MTCA cleanup criteria for herbicides include a wide range of analytes. The samples analyzed were not detected above the laboratory reporting limit. MTCA = Model Toxics Control ActNA = not analyzedND = not detected RCRA = Resource Conservation and Recovery ActMTCA Method A Cleanup Levels (μg/L)MTCA Method B Cleanup Levels (μg/L)RTN002-4:GW RTN003-1:GW RTN003-2:GW RTN003-3:GW RTN004-1:GWRTN002-4 RTN003-1 RTN003-2 RTN003-3 RTN004-12/9/2018 2/9/20182/9/2018 2/9/20181. U = the analyte was not detected above the laboratory reporting limit.2. All groundwater sample results are expressed in micrograms per liter (μg/L)3. Bold values indicate a detection above the laboratory reporting limit.4. shaded values indicate a detection above the applicable MTCA cleanup level μg/L = micrograms perr liter5. only detected VOCs are shown.2/9/20181802-116 1802-116 1802-116 1802-116 1802-11621-1-16700-301-R1f-T3.xlsx/wp/ayaPage 2 of 2 21-1-16700-301 PROJECT LOCATION 167 405 Railroad Rainier Avenue SS Grady Wa y Renton S 3rd Street900 LakeAvenue SAvenue SSh a t t u c k S 7th Street 515 Benson Drive SLLVICINITY MAP Bing Map Image adapted from aerial imagery provided by Autodesk Live Maps and Microsoft Bing Maps reprinted with permission from Microsoft Corporation. NOTE March 2018 21-1-16700-301 Filename: J:\211\16700\301\21-1-16700-301 Vic Map.dwg Date: 02-28-2018 Login: jrsWashingtonProjectLocation 90 5 Sound Ford Property - Phase II ESA Sound Transit ROW #RTN001 Through RTN004 Renton, Washington 0 1,000 2,000 Approximate Scale in Feet FIG. 1 Seattle RTN001167Rainier Avenue SElevator Room withHydraulic Oil ASTB-1Pad-MountedTransformerFormer GasDispenserFormer ASTsin Enclosure:Fresh OilUsed OilATFFormer USTs:2,000 Gal. Gas500 Gal. (ATF &500 Gal. Motor Oil)Former 500 Gal.Waste Oil USTAlignment PitFormer 1,000 Gal.Waste Oil USTPartsO/WTrench DrainService ShopWaste Oil ASTShowroomFormer SumpFormer Spray BoothUndercoat RoomFDFDO/WB-4Former 1,000 Gal.Waste Oil USTFormer 500 Gal.Waste Oil ASTFormer Machine ShopVaultRTN001-1RTN001-2RTN001-3RTN001-4RTN001-5RTN001-6RTN001-7RTN001-8RTN001-9RTN001-10RTN001-11SITE AND EXPLORATION PLANRTN001FIG. 221-1-16700-301Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTE060 120Approximate Scale in FeetFilename: J:\211\16700\301\21-1-16700-301 Site - RTN001.dwg Layout: Figure 2 Date: 02-28-2018 Login: jrsMarch 2018Draft Sound Ford Property - Phase II ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonApproximate Probe LocationApproximate Boring Location Completedby Others)RUPHUUnderground Storage Tank (UST)Aboveground Storage Tank (AST)Existing HoistFormer HoistOil/Water SeparatorFloor DrainB-4LEGENDO/WFDRTN001-11 RTN002Lake Avenue S Power TransmissionTowersFormer 500 Gal.Waste Oil USTSolvent RecyclerFormer Spray BoothsFormer Floor DrainCurrent Spray BoothsCurrent Mixing RoomFormer HoistPost Remnant?Former Alignment PitFormerMixingRoomPaint GunCleaning andSolvent RecyclerFormer OutdoorThinner Barrel StorageBody ShopFormer Spray BoothB-2B-3RTN002-1RTN002-2RTN002-3RTN002-4Filename: J:\211\16700\301\21-1-16700-301 Site - RTN002.dwg Layout: Figure 3 Date: 02-28-2018 Login: jrsSITE AND EXPLORATION PLANRTN002FIG. 321-1-16700-301Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTE060 120Approximate Scale in FeetMarch 2018Draft Sound Ford Property - Phase II ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonApproximate Probe LocationApproximate Boring Location Completed by Others)RUPHUUnderground Storage Tank (UST)Existing HoistFormer HoistLEGENDB-3RTN002-4 SITE AND EXPLORATION PLANRTN003 AND RTN004FIG. 421-1-16700-301Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTEFilename: J:\211\16700\301\21-1-16700-301 Site - RTN003-RTN004.dwg Layout: Figure 4 Date: 02-28-2018 Login: jrsMarch 2018Draft Sound Ford Property - Phase II ESASound Transit ROW #RTN001 Through RTN004Renton, Washington060 120Approximate Scale in FeetApproximate Probe LocationApproximate Boring Location Completed by OthersApproximate Test Pit Location Completed by OthersAboveground Storage Tank (AST)LEGENDEB-1EP-1RTN004-1 RTN001167Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN003RTN002RTN001-1RTN001-2RTN001-4RTN001-5RTN001-6RTN001-7RTN001-8RTN001-9RTN001-10RTN001-11RTN001-3RTN003-1RTN003-3RTN004-1RTN003-2RTN002-1RTN002-2RTN002-3RTN002-4CONTAMINATED SOIL LOCATIONS21-1-16700-301Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTE0100 200Approximate Scale in FeetFilename: J:\211\16700\301\21-1-16700-301 Site - Soils.dwg Layout: Figure 5 Date: 03-01-2018 Login: jrsMarch 2018Draft Sound Ford Property - Phase II ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonApproximate Probe LocationFormer Underground Storage Tank (UST)Aboveground Storage Tank (AST)Existing HoistFormer HoistLEGENDRTN001-11CONTAMINANTS EXPLANATIONVOCsPCBsDiesel and lube oil-rangepetroleum hydrocarbonscPAHsCarcinogenic Polycyclic Aromatic HydrocarbonsVolatile Organic HydrocarbonsModel Toxics Control ActPolychlorinated BiphenylscPAHsVOCsMTCAPCBsDetected Above MTCADetected Below MTCA, but Abovethe Laboratory Reporting LimitNot Analyzed or Detected Abovethe Laboratory Reporting LimitNOTES1. Exceedances noted are for soil concentrations greater thanthe MTCA Method A cleanup criteria: 2,000 mg/kg forDiesel/Lube Oil, 0.10 mg/kg for cPAHs, and 1 mg/kg for PCBs.2. MTCA cleanup criteria for VOCs vary; refer to Table 2.3. MTCA-5/RCRA-8 Metals were detected in each of the soilsamples analyzed below the applicable MTCA cleanup criteria.FIG. 5 RTN001167Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN003RTN002RTN001-1RTN001-2RTN001-4RTN001-5RTN001-6RTN001-7RTN001-8RTN001-9RTN001-10RTN001-11RTN001-3RTN003-1RTN003-3RTN004-1RTN003-2RTN002-1RTN002-2RTN002-3RTN002-4CONTAMINATED GROUNDWATERLOCATIONS21-1-16700-301Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTE0100 200Approximate Scale in FeetFilename: J:\211\16700\301\21-1-16700-301 Site - GW.dwg Layout: Figure 6 Date: 03-06-2018 Login: jrsMarch 2018Draft Sound Ford Property - Phase II ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonApproximate Probe LocationFormer Underground Storage Tank (UST)Aboveground Storage Tank (AST)Existing HoistFormer HoistLEGENDRTN001-11CONTAMINANTS EXPLANATIONVOCsMetalsDiesel and lube oil-rangepetroleum hydrocarbonsVolatile Organic HydrocarbonsModel Toxics Control ActVOCsMTCADetected Above MTCADetected Below MTCA, but Abovethe Laboratory Reporting LimitNot Analyzed or Detected Abovethe Laboratory Reporting LimitNOTES1. Exceedances noted are for groundwater concentrationsgreater than the MTCA Method A cleanup criteria: 500 μg/Lfor Diesel/Lube Oil.2. MTCA cleanup criteria for VOCs and metals vary; refer toTable 2.3. Metals results shown are the dissolved analysis.FIG. 6 21-1-16700-301 APPENDIX A FIELD METHODS AND EXPLORATION LOGS 21-1-16700-301-R1f-AA.docx/wp/aya 21-1-16700-301 A-i APPENDIX A FIELD METHODS AND EXPLORATION LOGS TABLE OF CONTENTS Page A.1 INTRODUCTION..........................................................................................................A-1 A.2 PRE-SAMPLING ACTIVITIES ....................................................................................A-1 A.3 SAMPLE COLLECTION...............................................................................................A-1 A.3.1 Hydraulic Probe Rig Drilling...........................................................................A-1 A.3.2 Temporary Well Installation.............................................................................A-2 A.3.3 Soil Sampling...................................................................................................A-2 A.3.4 Groundwater Sampling.....................................................................................A-2 A.4 SAMPLE HANDLING...................................................................................................A-2 A.5 FIELD SCREENING METHODS .................................................................................A-3 A.5.1 Photoionization Detector (PID) Measurements................................................A-3 A.5.2 Visual Observation...........................................................................................A-3 A.5.3 Odors ................................................................................................................A-4 A.5.4 Field-Screening Documentation.......................................................................A-4 A.6 ANALYTICAL METHODS ..........................................................................................A-4 A.7 DECONTAMINATION METHODS.............................................................................A-5 A.7.1 Direct-Push Probe.............................................................................................A-5 A.7.2 Sampling Equipment........................................................................................A-5 A.8 INVESTIGATION-DERIVED WASTE (IDW) ............................................................A-6 TABLE OF CONTENTS (cont.) 21-1-16700-301-R1f-AA.docx/wp/aya 21-1-16700-301 A-ii FIGURES A-1 Soil Description and Log Key (3 sheets) A-2 Log of Geoprobe RTN001-1 A-3 Log of Geoprobe RTN001-2 A-4 Log of Geoprobe RTN001-3 A-5 Log of Geoprobe RTN001-4 A-6 Log of Geoprobe RTN001-5 A-7 Log of Geoprobe RTN001-6 A-8 Log of Geoprobe RTN001-7 A-9 Log of Geoprobe RTN001-8 A-10 Log of Geoprobe RTN001-9 A-11 Log of Geoprobe RTN001-10 A-12 Log of Geoprobe RTN001-11 A-13 Log of Geoprobe RTN002-1 A-14 Log of Geoprobe RTN002-2 A-15 Log of Geoprobe RTN002-3 A-16 Log of Geoprobe RTN002-4 A-17 Log of Geoprobe RTN003-1 A-18 Log of Geoprobe RTN003-2 A-19 Log of Geoprobe RTN003-3 A-20 Log of Geoprobe RTN004-1 21-1-16700-301-R1f-AA.docx/wp/aya 21-1-16700-301 A-1 APPENDIX A FIELD METHODS AND EXPLORATION LOGS A.1 INTRODUCTION The project consisted of performing subsurface environmental sampling to support acquisition of Sound Transit Parcel Number RTN001 through RTN004 Sound Ford Property, located at 750 Rainier Avenue S. and S. Grady Way in Renton, Washington. The investigation and analysis are intended to assess quality of soil and groundwater that is present in the subsurface. Standard investigation methods, including sample collection, field screening, documentation procedures, and selected analyses, are described briefly in the following subsections. Sample collection and documentation were completed in accordance with Shannon & Wilson’s standard operating procedures. A.2 PRE-SAMPLING ACTIVITIES Shannon & Wilson coordinated with Sound Transit Community Outreach to gain access to the Sound Ford property. A representative of Shannon & Wilson notified the Underground Utilities Location Center (1-800-424-5555) at least 48 hours before the start of subsurface work at the site. Applied Professional Services surveyed the area within 30 feet of each probe exploration for utilities. A.3 SAMPLE COLLECTION During the field investigation, soil and groundwater samples were collected to evaluate the potential for site contamination. The various methods of collecting samples are presented below. Sample handling procedures are summarized in Section A.4. The samples were submitted to OnSite Environmental, Inc. (OnSite) of Redmond, Washington, laboratory for analysis by the methods discussed in Section A.6. Decontamination procedures are presented in Section A.7. A.3.1 Hydraulic Probe Rig Drilling A direct-push hydraulic probe rig was used to collect subsurface soil and groundwater samples. The probe was advanced to the depth described in the proposal for this project. Two soil and one groundwater sample were collected from each exploration, except for at RTN001-8, which included one soil sample due to recovery loss. Logs for the explorations are included as Figures A-2 through A-20. 21-1-16700-301-R1f-AA.docx/wp/aya 21-1-16700-301 A-2 A.3.2 Temporary Well Installation Temporary wells were installed to collect groundwater samples. The temporary wells were set just off the bottom of the hole and screened to the observed groundwater. The temporary wells were constructed of 1-inch-diameter, Schedule 40 polyvinyl chloride pipe; no sand pack was placed around the pipe. After the temporary wells were installed, they were purged for approximately one minute prior to groundwater sampling. A.3.3 Soil Sampling Soil was visually described using Shannon & Wilson’s soil classification procedure, which is a modified version of the Unified Soil Classification System. The soil descriptions were recorded on field logs. When a soil sample was selected for chemical analysis, the soil sample was placed into laboratory-supplied glassware using disposable, stainless-steel spoons or disposable plastic syringes. Soil samples were collected in the upper vadose zone above groundwater where evidence of impacted soil was observed and at the approximate soil-water interface at each location. The soil-water interface is the minimum depth at which the soil is in contact with groundwater. A.3.4 Groundwater Sampling One groundwater sample from each probe location that reached groundwater was collected using a peristaltic pump to extract water from the temporary well. After the samples were collected, the temporary wells were removed and probe holes were backfilled with bentonite chips and patched with a cold asphalt patch where applicable. A.4 SAMPLE HANDLING Environmental samples were collected using disposable sampling equipment. New nitrile gloves were worn by the sample handler during collection of each sample. Non-disposable sampling equipment was decontaminated between sample locations to reduce potential for cross contamination. Field notes documented site conditions and sample collection activities. Samples collected for laboratory analysis were placed into pre-cleaned laboratory-provided glassware and containerized sequentially, with the most volatile target analyte collected first. The preferred collection order for some of the more common analytes is (a) volatile organics and petroleum, (b) semi-volatile organics, and (c) metals. The sample container labels were completed using indelible ink. The samples were sealed in plastic bags, and then placed into a cooler and maintained at 4 degrees Celsius (qC) (+ 2qC) with “blue ice.” 21-1-16700-301-R1f-AA.docx/wp/aya 21-1-16700-301 A-3 Sample information was recorded on chain-of-custody forms, and these forms accompanied the samples to the laboratory. Samples were maintained under chain of custody until delivered to OnSite. A.5 FIELD SCREENING METHODS Field screening of soil samples helped evaluate the potential presence of contamination. Typically, at a nonhazardous waste site, the most likely locations to encounter contamination are in fill, at the water table interface, in the water table smear (fluctuation) zone, at fill/native soil contacts, and at pronounced changes in permeability. However, the location of contamination, if any, is site-dependent. Field screening methods typically consisted of: Photoionization detector (PID) measurements. Visual observations. Olfactory observations. The three methods were used for the site. New nitrile gloves were worn by the field personnel during the screening. A.5.1 Photoionization Detector (PID) Measurements PID measurements were collected on soil samples to screen for volatile organic vapors such as gasoline and solvents. Typically, decaying organics can elevate PID measurements and diesel and oil can rarely be detected with the PID. PID measurements were obtained by passing the instrument directly over the soil. A.5.2 Visual Observation Visual observations of soil samples and cuttings were recorded in the boring log or in the field logbook. Indications of contamination include: Black tarry substances. Oily or shiny soil. Metallic flakes. Free-product petroleum or organic hydrocarbons. Gray, pink, red, or black discolorations. 21-1-16700-301-R1f-AA.docx/wp/aya 21-1-16700-301 A-4 A.5.3 Odors Unusual odors were recorded when noted during drilling or sampling. Soil was not intentionally smelled for contamination. Soil was not tasted for classification purposes. A.5.4 Field-Screening Documentation During screening, the following items were recorded: Type of measurement/observation Depth Time of measurement or observation Possible source Description of odor (petroleum, decaying organics, creosote, cedar, etc.) A.6 ANALYTICAL METHODS Soil samples were analyzed for one or more of the following methods: Hydrocarbon Identification (NWTPH-HCID) TPH-G using Method Northwest Total Petroleum Hydrocarbon (NWTPH) gasoline- range. TPH-D and TPH-O using Method NWTPH diesel-range extended. Model Toxics Control Act (MTCA) 5 metals (arsenic, cadmium, chromium, lead, and mercury) by U.S. Environmental Protection Agency (EPA) Method 6000/7000. Resource Conservation and Recovery Act (RCRA) 8 metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver) by EPA Method 6000/7000 series. Copper, nickel, and zinc by EPA 6000 series. VOCs by EPA Method 8260C with ethylene dibromide (EDB), 1,2-dichloroethane (EDC), and methyl tert-butyl ether (MTBE). Chlorinated acid herbicides by EPA Method 8151A. Since levels of oil-range hydrocarbons were detected, 19 samples were analyzed for polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) by EPA Method 8270D/SIM and EPA 8082A, respectively. These samples were selected to further the environmental investigation and support disposal characterization of waste generated during the field explorations. 21-1-16700-301-R1f-AA.docx/wp/aya 21-1-16700-301 A-5 Groundwater samples were analyzed by the following methods: Hydrocarbon Identification (NWTPH-HCID) TPH-G using Method NWTPH-Gasoline. TPH-D and TPH-O using Method NWTPH-Diesel-extended. Total or dissolved MTCA-5 and RCRA-8 metals by EPA Method 200.8/7470A. Total and dissolved Priority Pollutant Metals by EPA Method 200.8/7470A (antimony, arsenic, barium, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, thallium, and zinc). VOCs by EPA Method 8260C. Chlorinated acid herbicides by EPA Method 8151A. Select groundwater samples were analyzed for total and dissolved lead based on location and potential contamination sources from site use. Other select groundwater samples were analyzed for copper, nickel, and zinc to support disposal characterization. A.7 DECONTAMINATION METHODS The primary objective of the decontamination process is to reduce the potential for the accidental introduction of contaminants to non-contaminated areas or samples. This section describes the methods associated with decontamination of field equipment. A.7.1 Direct-Push Probe Equipment used during soil activities was steam cleaned prior to use. Following decontamination, caution was taken to keep the equipment off the ground by placing the equipment on clean, plastic sheeting or equivalent. The probe subcontractor provided a sufficient amount of direct-push equipment and samplers to conduct the project without decontaminating between locations. The associated direct-push equipment and samplers were decontaminated at the site at the end of sampling activities. A.7.2 Sampling Equipment Groundwater and soil sampling equipment was cleaned prior to and at the completion of each probe location. Wherever possible, sampling equipment was dedicated to a single location to reduce potential cross contamination. Other non-dedicated sampling equipment used during the field activities was decontaminated as follows: 21-1-16700-301-R1f-AA.docx/wp/aya 21-1-16700-301 A-6 Remove gross contamination and particulate matter. Wash thoroughly with Alconox or similar non-phosphate detergent plus tap water or designated decontamination water supply source. Rinse equipment thoroughly with distilled or deionized water. A.8 INVESTIGATION-DERIVED WASTE (IDW) IDW is waste generated during sampling activities. IDW that was generated during these sampling activities included soil cuttings and purge water. The soil cuttings, purge water, and decontamination water were placed into three steel 20-gallon drums and temporarily stored on site pending receipt of analytical results. Miscellaneous IDW consisted of used personal protective equipment (PPE), disposable sampling equipment (spoons, tubing, etc.), and other wastes that originated from site activities. This IDW was placed in doubled, heavy-duty plastic bags. 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nSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 February 15, 2018 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 21-1-16700-301 Laboratory Reference No. 1802-076 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on February 8, 2018. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 Case Narrative Samples were collected on February 7 and 8, 2018 and received by the laboratory on February 8, 2018. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. PAHs EPA 8270D/SIM Analysis Sample RTN001-2:13.0 had one surrogate recovery out of control limits. This is within allowance of our standard operating procedure as long as the recovery is above 10%. Due to the problematic nature of select sample matrixes, not all desired PQL’s could not be met. Any other QA/QC issues associated with this extraction and analysis will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:3.0 Laboratory ID: 02-076-01 Gasoline ND 5.2 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 93 66-130 Client ID: RTN001-11:11.0 Laboratory ID: 02-076-02 Gasoline ND 10 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 109 66-130 Client ID: RTN001-10:5.5 Laboratory ID: 02-076-03 Gasoline ND 9.7 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 121 66-130 Client ID: RTN001-10:12.0 Laboratory ID: 02-076-04 Gasoline ND 7.4 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 108 66-130 Client ID: RTN001-9:5.0 Laboratory ID: 02-076-05 Gasoline ND 4.1 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 95 66-130 Client ID: RTN001-9:12.0 Laboratory ID: 02-076-06 Gasoline ND 8.7 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 104 66-130 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:6.0 Laboratory ID: 02-076-07 Gasoline ND 4.4 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 89 66-130 Client ID: RTN001-4:12.0 Laboratory ID: 02-076-08 Gasoline ND 9.3 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 103 66-130 Client ID: RTN001-2:9.5 Laboratory ID: 02-076-09 Gasoline 24 6.2 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 89 66-130 Client ID: RTN001-2:13.0 Laboratory ID: 02-076-10 Gasoline ND 6.8 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 93 66-130 Client ID: RTN001-1:6.0 Laboratory ID: 02-076-11 Gasoline ND 7.4 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 114 66-130 Client ID: RTN001-1:12.5 Laboratory ID: 02-076-12 Gasoline ND 6.9 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 91 66-130 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0208S1 Gasoline ND 5.0 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 85 66-130 Laboratory ID: MB0208S2 Gasoline ND 5.0 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 89 66-130 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-076-02 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 109 107 66-130 Laboratory ID: 02-062-02 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 85 86 66-130 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:GW Laboratory ID: 02-076-13 Gasoline ND 100 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 78 66-114 Client ID: RTN001-10:GW Laboratory ID: 02-076-14 Gasoline ND 100 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 75 66-114 Client ID: RTN001-9:GW Laboratory ID: 02-076-15 Gasoline ND 100 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 76 66-114 Client ID: RTN001-4:GW Laboratory ID: 02-076-16 Gasoline ND 100 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 76 66-114 Client ID: RTN001-2:GW Laboratory ID: 02-076-17 Gasoline ND 100 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 80 66-114 Client ID: RTN001-1:GW Laboratory ID: 02-076-18 Gasoline ND 100 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 76 66-114 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0208W1 Gasoline ND 100 NWTPH-Gx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 77 66-114 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-030-01 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 76 74 66-114 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:3.0 Laboratory ID: 02-076-01 Diesel Range Organics 650 590 NWTPH-Dx 2-8-18 2-8-18 Lube Oil 2300 1200 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl --- 50-150 S Client ID: RTN001-11:11.0 Laboratory ID: 02-076-02 Diesel Range Organics ND 40 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics 140 79 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 91 50-150 Client ID: RTN001-10:5.5 Laboratory ID: 02-076-03 Diesel Range Organics ND 52 NWTPH-Dx 2-8-18 2-8-18 U1 Lube Oil Range Organics 290 81 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 100 50-150 Client ID: RTN001-10:12.0 Laboratory ID: 02-076-04 Diesel Range Organics ND 180 NWTPH-Dx 2-8-18 2-8-18 Lube Oil 530 360 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 76 50-150 Client ID: RTN001-9:5.0 Laboratory ID: 02-076-05 Diesel Range Organics ND 28 NWTPH-Dx 2-8-18 2-8-18 Lube Oil 100 56 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 82 50-150 Client ID: RTN001-9:12.0 Laboratory ID: 02-076-06 Diesel Range Organics ND 37 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics ND 73 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 69 50-150 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:6.0 Laboratory ID: 02-076-07 Diesel Range Organics ND 290 NWTPH-Dx 2-8-18 2-8-18 Lube Oil 2000 570 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl --- 50-150 S Client ID: RTN001-4:12.0 Laboratory ID: 02-076-08 Diesel Range Organics ND 36 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics 180 73 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 92 50-150 Client ID: RTN001-2:9.5 Laboratory ID: 02-076-09 Diesel Range Organics ND 2800 NWTPH-Dx 2-8-18 2-8-18 Lube Oil 16000 5500 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl --- 50-150 S Client ID: RTN001-2:13.0 Laboratory ID: 02-076-10 Diesel Range Organics ND 150 NWTPH-Dx 2-8-18 2-8-18 Lube Oil 630 300 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 Client ID: RTN001-1:6.0 Laboratory ID: 02-076-11 Diesel Range Organics ND 37 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics ND 74 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 63 50-150 Client ID: RTN001-1:12.5 Laboratory ID: 02-076-12 Diesel Range Organics ND 33 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics ND 66 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 82 50-150 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0208S1 Diesel Range Organics ND 25 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics ND 50 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 86 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-076-02 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range Organics 90.4 80.2 NA NA NA NA 12 NA Surrogate: o-Terphenyl 91 87 50-150 Laboratory ID: 02-076-12 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 82 95 50-150 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:GW Laboratory ID: 02-076-13 Diesel Range Organics ND 0.29 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics ND 0.46 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 82 50-150 Client ID: RTN001-10:GW Laboratory ID: 02-076-14 Diesel Range Organics 0.42 0.27 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics 0.74 0.44 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 79 50-150 Client ID: RTN001-9:GW Laboratory ID: 02-076-15 Diesel Range Organics 0.28 0.27 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics ND 0.44 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 88 50-150 Client ID: RTN001-4:GW Laboratory ID: 02-076-16 Diesel Range Organics ND 0.27 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics ND 0.43 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 62 50-150 Client ID: RTN001-2:GW Laboratory ID: 02-076-17 Diesel Range Organics ND 0.29 NWTPH-Dx 2-8-18 2-9-18 U1 Lube Oil 2.8 0.40 NWTPH-Dx 2-8-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 63 50-150 Client ID: RTN001-1:GW Laboratory ID: 02-076-18 Diesel Range Organics ND 0.27 NWTPH-Dx 2-8-18 2-8-18 Lube Oil Range Organics ND 0.43 NWTPH-Dx 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 91 50-150 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0208W1 Diesel Range Organics ND 0.25 NWTPH-Dx 2-8-18 2-9-18 Lube Oil Range Organics ND 0.40 NWTPH-Dx 2-8-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 79 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-076-18 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 91 94 50-150 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:3.0 Laboratory ID: 02-076-01 Dichlorodifluoromethane ND 0.0023 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0061 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.00088 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0044 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.00088 EPA 8260C 2-8-18 2-8-18 Acetone 0.14 0.0044 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0044 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.00088 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0044 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.00088 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0044 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.00088 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.00088 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.020 0.0044 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.00088 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0044 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.00088 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0044 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0044 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.00088 EPA 8260C 2-8-18 2-8-18 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:3.0 Laboratory ID: 02-076-01 1,1,2-Trichloroethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.00088 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0044 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.00088 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.00088 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.00088 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0044 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.00088 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.00088 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0044 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.00088 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.065 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.065 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.065 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.065 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.065 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.33 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.33 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.065 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.065 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 130 75-131 Toluene-d8 115 83-130 4-Bromofluorobenzene 92 78-130 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:11.0 Laboratory ID: 02-076-02 Dichlorodifluoromethane ND 0.0048 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.013 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0018 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0092 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Acetone 0.15 0.0092 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0092 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0018 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0092 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0092 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0018 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0018 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.025 0.0092 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0024 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0092 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0092 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0092 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0018 EPA 8260C 2-8-18 2-8-18 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:11.0 Laboratory ID: 02-076-02 1,1,2-Trichloroethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0018 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0092 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0092 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0092 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.0018 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.0018 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0092 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0092 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.0018 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.0018 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 122 75-131 Toluene-d8 122 83-130 4-Bromofluorobenzene 110 78-130 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:5.5 Laboratory ID: 02-076-03 Dichlorodifluoromethane ND 0.0028 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0075 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0054 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Acetone 0.10 0.0054 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0054 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0011 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0054 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0054 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.016 0.0054 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0014 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0054 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0054 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0054 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-8-18 2-8-18 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:5.5 Laboratory ID: 02-076-03 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0054 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0054 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0054 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.12 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.12 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.12 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.12 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.12 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.58 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.58 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.12 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.12 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 127 75-131 Toluene-d8 120 83-130 4-Bromofluorobenzene 103 78-130 19 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:12.0 Laboratory ID: 02-076-04 Dichlorodifluoromethane ND 0.0030 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0082 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0012 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0059 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Acetone 0.075 0.0059 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0059 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0012 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0059 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0059 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0012 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.013 0.0059 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0059 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0059 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0059 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0012 EPA 8260C 2-8-18 2-8-18 20 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:12.0 Laboratory ID: 02-076-04 1,1,2-Trichloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0012 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0059 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0059 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0059 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.0012 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.0012 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0059 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0059 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 124 75-131 Toluene-d8 123 83-130 4-Bromofluorobenzene 114 78-130 21 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-9:5.0 Laboratory ID: 02-076-05 Dichlorodifluoromethane ND 0.0023 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0061 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.00087 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0044 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Acetone 0.047 0.0044 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0044 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.00087 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0044 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0044 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.00087 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.00087 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.0060 0.0044 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0044 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0044 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0044 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.00087 EPA 8260C 2-8-18 2-8-18 22 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-9:5.0 Laboratory ID: 02-076-05 1,1,2-Trichloroethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.00087 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0044 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0044 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0044 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.00087 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.00087 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0044 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0044 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.00087 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.00087 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 122 75-131 Toluene-d8 120 83-130 4-Bromofluorobenzene 108 78-130 23 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-9:12.0 Laboratory ID: 02-076-06 Dichlorodifluoromethane ND 0.0044 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.012 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0017 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0085 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Acetone 0.21 0.0085 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0085 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0017 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0085 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0085 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0017 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0017 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.027 0.0085 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0022 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0085 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0085 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0085 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0017 EPA 8260C 2-8-18 2-8-18 24 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-9:12.0 Laboratory ID: 02-076-06 1,1,2-Trichloroethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0017 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0085 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0085 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0085 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.0017 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.0017 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0085 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0085 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.0017 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.0017 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 119 75-131 Toluene-d8 120 83-130 4-Bromofluorobenzene 110 78-130 25 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:6.0 Laboratory ID: 02-076-07 Dichlorodifluoromethane ND 0.0027 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0072 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0010 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0052 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Acetone 0.0096 0.0052 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0052 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0010 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0052 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0052 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0010 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 0.0052 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0013 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0052 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0052 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0052 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-8-18 2-8-18 26 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:6.0 Laboratory ID: 02-076-07 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0010 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0052 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0052 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0052 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.0010 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0052 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0052 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 123 75-131 Toluene-d8 121 83-130 4-Bromofluorobenzene 108 78-130 27 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:12.0 Laboratory ID: 02-076-08 Dichlorodifluoromethane ND 0.0040 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.011 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0015 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0077 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Acetone 0.16 0.0077 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0077 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0015 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0077 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0077 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0015 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0015 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.025 0.0077 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0020 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0077 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0077 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0077 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0015 EPA 8260C 2-8-18 2-8-18 28 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:12.0 Laboratory ID: 02-076-08 1,1,2-Trichloroethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0015 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0077 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0077 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0077 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.0015 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.0015 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0077 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0077 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.0015 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.0015 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 120 75-131 Toluene-d8 121 83-130 4-Bromofluorobenzene 107 78-130 29 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-2:9.5 Laboratory ID: 02-076-09 Dichlorodifluoromethane ND 0.0025 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0068 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.00097 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0049 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.00097 EPA 8260C 2-8-18 2-8-18 Acetone ND 0.0049 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 0.0049 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.00097 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0049 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.00097 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.00097 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0049 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.00097 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.00097 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 0.0049 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0013 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.00097 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.00097 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.00097 EPA 8260C 2-8-18 2-8-18 Benzene 0.0016 0.00097 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.00097 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0049 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.00097 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone 0.022 0.0049 EPA 8260C 2-8-18 2-8-18 Y Toluene ND 0.0049 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.00097 EPA 8260C 2-8-18 2-8-18 30 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-2:9.5 Laboratory ID: 02-076-09 1,1,2-Trichloroethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.00097 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.00097 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0049 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.00097 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.00097 EPA 8260C 2-8-18 2-8-18 Ethylbenzene 0.16 0.00097 EPA 8260C 2-8-18 2-8-18 m,p-Xylene 0.26 0.0049 EPA 8260C 2-8-18 2-8-18 o-Xylene 0.013 0.00097 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.00097 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0049 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene 0.017 0.00097 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.062 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.062 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene 0.57 0.062 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.062 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.062 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene 0.82 0.062 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene 3.4 0.062 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.062 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.31 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.31 EPA 8260C 2-9-18 2-9-18 Naphthalene 1.0 0.062 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.062 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 111 75-131 Toluene-d8 113 83-130 4-Bromofluorobenzene 97 78-130 31 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-2:13.0 Laboratory ID: 02-076-10 Dichlorodifluoromethane ND 0.0031 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0082 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0012 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0059 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Acetone 0.18 0.0059 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0059 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0012 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0059 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0059 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0012 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.031 0.0059 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0015 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0059 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0059 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0059 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0012 EPA 8260C 2-8-18 2-8-18 32 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-2:13.0 Laboratory ID: 02-076-10 1,1,2-Trichloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0012 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0059 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0059 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0059 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.0012 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.0012 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene 0.0036 0.0012 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0059 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0059 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.0012 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.0012 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 123 75-131 Toluene-d8 120 83-130 4-Bromofluorobenzene 111 78-130 33 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-1:6.0 Laboratory ID: 02-076-11 Dichlorodifluoromethane ND 0.0029 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0077 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0055 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Acetone 0.056 0.0055 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0055 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0011 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0055 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0055 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.0061 0.0055 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0014 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0055 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0055 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0055 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-8-18 2-8-18 34 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-1:6.0 Laboratory ID: 02-076-11 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0055 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0055 EPA 8260C 2-8-18 2-8-18 o-Xylene 0.0011 0.0011 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0055 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.0011 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0055 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0055 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.0011 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 123 75-131 Toluene-d8 119 83-130 4-Bromofluorobenzene 108 78-130 35 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-1:12.5 Laboratory ID: 02-076-12 Dichlorodifluoromethane ND 0.0024 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0064 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.00091 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0045 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Acetone 0.054 0.0045 EPA 8260C 2-8-18 2-8-18 Y Iodomethane ND 0.0045 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.00091 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0045 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0045 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.00091 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.00091 EPA 8260C 2-8-18 2-8-18 2-Butanone 0.0059 0.0045 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0012 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0045 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0045 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0045 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.00091 EPA 8260C 2-8-18 2-8-18 36 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-1:12.5 Laboratory ID: 02-076-12 1,1,2-Trichloroethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.00091 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0045 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0045 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0045 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.00091 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.00091 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0045 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0045 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.00091 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.00091 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 111 75-131 Toluene-d8 111 83-130 4-Bromofluorobenzene 101 78-130 37 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0208S1 Dichlorodifluoromethane ND 0.0026 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 0.0070 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.0010 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 0.0050 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Acetone ND 0.0050 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 0.0050 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.0010 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 0.0050 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 0.0050 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.0010 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 0.0050 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.0013 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 0.0050 EPA 8260C 2-8-18 2-8-18 Toluene ND 0.0050 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-8-18 2-8-18 38 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0208S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.0010 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 0.0050 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.0050 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Bromoform ND 0.0050 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.0010 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.0050 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 0.0010 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 105 75-131 Toluene-d8 103 83-130 4-Bromofluorobenzene 98 78-130 39 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0208S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0556 0.0560 0.0500 0.0500 111 112 58-126 1 20 Benzene 0.0497 0.0482 0.0500 0.0500 99 96 72-122 3 19 Trichloroethene 0.0378 0.0381 0.0500 0.0500 76 76 75-120 1 20 Toluene 0.0508 0.0518 0.0500 0.0500 102 104 78-123 2 19 Chlorobenzene 0.0477 0.0478 0.0500 0.0500 95 96 75-120 0 18 Surrogate: Dibromofluoromethane 103 101 75-131 Toluene-d8 100 101 83-130 4-Bromofluorobenzene 97 97 78-130 40 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:GW Laboratory ID: 02-076-13 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Acetone 7.0 5.0 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.20 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 1.0 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 5.0 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-8-18 2-8-18 Toluene ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 41 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:GW Laboratory ID: 02-076-13 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 2.0 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.40 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.20 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromoform ND 1.0 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 75-127 Toluene-d8 106 80-127 4-Bromofluorobenzene 97 78-125 42 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:GW Laboratory ID: 02-076-14 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride 0.33 0.20 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Acetone 30 5.0 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.20 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 1.0 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 5.0 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-8-18 2-8-18 Toluene ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 43 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:GW Laboratory ID: 02-076-14 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 2.0 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.40 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.20 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromoform ND 1.0 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 99 75-127 Toluene-d8 109 80-127 4-Bromofluorobenzene 99 78-125 44 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-9:GW Laboratory ID: 02-076-15 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Acetone ND 5.0 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.20 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether 0.28 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 1.0 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 5.0 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-8-18 2-8-18 Toluene ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 45 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-9:GW Laboratory ID: 02-076-15 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 2.0 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.40 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.20 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromoform ND 1.0 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 93 75-127 Toluene-d8 101 80-127 4-Bromofluorobenzene 87 78-125 46 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:GW Laboratory ID: 02-076-16 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Acetone ND 5.0 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.20 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 1.0 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 5.0 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-8-18 2-8-18 Toluene ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 47 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:GW Laboratory ID: 02-076-16 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 2.0 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.40 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.20 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromoform ND 1.0 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 96 75-127 Toluene-d8 105 80-127 4-Bromofluorobenzene 96 78-125 48 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-2:GW Laboratory ID: 02-076-17 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Acetone ND 5.0 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.20 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 1.0 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 5.0 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-8-18 2-8-18 Toluene ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 49 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-2:GW Laboratory ID: 02-076-17 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 2.0 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Ethylbenzene 0.80 0.20 EPA 8260C 2-8-18 2-8-18 m,p-Xylene 1.4 0.40 EPA 8260C 2-8-18 2-8-18 o-Xylene 0.28 0.20 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromoform ND 1.0 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene 0.56 0.20 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene 0.24 0.20 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene 3.0 0.20 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-8-18 2-8-18 Naphthalene 1.8 1.0 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 75-127 Toluene-d8 108 80-127 4-Bromofluorobenzene 98 78-125 50 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-1:GW Laboratory ID: 02-076-18 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Acetone ND 5.0 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.20 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 1.0 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 5.0 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-8-18 2-8-18 Toluene ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 51 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-1:GW Laboratory ID: 02-076-18 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 2.0 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.40 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.20 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromoform ND 1.0 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 75-127 Toluene-d8 109 80-127 4-Bromofluorobenzene 98 78-125 52 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: TRIP BLANK Laboratory ID: 02-076-19 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Acetone ND 5.0 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.20 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 1.0 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 5.0 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-8-18 2-8-18 Toluene ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 53 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: TRIP BLANK Laboratory ID: 02-076-19 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 2.0 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.40 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.20 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromoform ND 1.0 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 75-127 Toluene-d8 106 80-127 4-Bromofluorobenzene 97 78-125 54 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0208W1 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloromethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Vinyl Chloride ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Acetone ND 5.0 EPA 8260C 2-8-18 2-8-18 Iodomethane ND 1.0 EPA 8260C 2-8-18 2-8-18 Carbon Disulfide ND 0.20 EPA 8260C 2-8-18 2-8-18 Methylene Chloride ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Vinyl Acetate ND 1.0 EPA 8260C 2-8-18 2-8-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Butanone ND 5.0 EPA 8260C 2-8-18 2-8-18 Bromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chloroform ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Benzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Trichloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 Dibromomethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromodichloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-8-18 2-8-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-8-18 2-8-18 Toluene ND 1.0 EPA 8260C 2-8-18 2-8-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-8-18 2-8-18 55 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0208W1 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Tetrachloroethene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Hexanone ND 2.0 EPA 8260C 2-8-18 2-8-18 Dibromochloromethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Chlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 Ethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 m,p-Xylene ND 0.40 EPA 8260C 2-8-18 2-8-18 o-Xylene ND 0.20 EPA 8260C 2-8-18 2-8-18 Styrene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromoform ND 1.0 EPA 8260C 2-8-18 2-8-18 Isopropylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Bromobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Propylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 n-Butylbenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-8-18 2-8-18 Naphthalene ND 1.0 EPA 8260C 2-8-18 2-8-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 97 75-127 Toluene-d8 104 80-127 4-Bromofluorobenzene 95 78-125 56 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 VOLATILES EPA 8260C SB/SBD QUALITY CONTROL Matrix: Water Units: ug/L Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0208W1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 9.38 9.11 10.0 10.0 94 91 63-126 3 21 Benzene 10.6 10.2 10.0 10.0 106 102 78-122 4 19 Trichloroethene 10.3 9.94 10.0 10.0 103 99 63-120 4 20 Toluene 11.4 10.9 10.0 10.0 114 109 79-124 4 19 Chlorobenzene 10.3 9.82 10.0 10.0 103 98 78-120 5 19 Surrogate: Dibromofluoromethane 99 96 75-127 Toluene-d8 105 102 80-127 4-Bromofluorobenzene 96 94 78-125 57 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:3.0 Laboratory ID: 02-076-01 Naphthalene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene 0.34 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene ND 0.16 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 75 32 - 115 Pyrene-d10 71 35 - 129 Terphenyl-d14 92 33 - 114 58 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:11.0 Laboratory ID: 02-076-02 Naphthalene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene ND 0.011 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 82 32 - 115 Pyrene-d10 84 35 - 129 Terphenyl-d14 91 33 - 114 59 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:5.5 Laboratory ID: 02-076-03 Naphthalene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene 0.032 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene 0.038 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene 0.031 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene ND 0.022 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 74 32 - 115 Pyrene-d10 71 35 - 129 Terphenyl-d14 112 33 - 114 60 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:12.0 Laboratory ID: 02-076-04 Naphthalene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene 0.015 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene 0.011 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene 0.020 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene 0.020 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene 0.010 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene ND 0.0096 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 64 32 - 115 Pyrene-d10 64 35 - 129 Terphenyl-d14 102 33 - 114 61 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-9:5.0 Laboratory ID: 02-076-05 Naphthalene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene 0.012 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene 0.024 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene 0.013 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene 0.042 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene 0.0082 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene 0.026 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene 0.022 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene 0.018 0.0074 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 78 32 - 115 Pyrene-d10 75 35 - 129 Terphenyl-d14 93 33 - 114 62 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:6.0 Laboratory ID: 02-076-07 Naphthalene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene 0.12 0.076 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 74 32 - 115 Pyrene-d10 55 35 - 129 Terphenyl-d14 96 33 - 114 63 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:12.0 Laboratory ID: 02-076-08 Naphthalene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene ND 0.0097 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 77 32 - 115 Pyrene-d10 76 35 - 129 Terphenyl-d14 99 33 - 114 64 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-2:9.5 Laboratory ID: 02-076-09 Naphthalene 0.19 0.15 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene 0.20 0.15 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene 0.30 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene ND 0.15 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 72 32 - 115 Pyrene-d10 56 35 - 129 Terphenyl-d14 86 33 - 114 65 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-2:13.0 Laboratory ID: 02-076-10 Naphthalene 0.012 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene 0.014 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene 0.0090 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene ND 0.0081 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 82 32 - 115 Pyrene-d10 77 35 - 129 Terphenyl-d14 115 33 - 114 Q 66 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM METHOD BLANK QUALITY CONTROL Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0209S1 Naphthalene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 2-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 1-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthylene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Acenaphthene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Fluorene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Phenanthrene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Anthracene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Fluoranthene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Pyrene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]anthracene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Chrysene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[b]fluoranthene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Benzo(j,k)fluoranthene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[a]pyrene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Indeno(1,2,3-c,d)pyrene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Dibenz[a,h]anthracene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Benzo[g,h,i]perylene ND 0.0067 EPA 8270D/SIM 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 74 32 - 115 Pyrene-d10 85 35 - 129 Terphenyl-d14 91 33 - 114 67 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PAHs EPA 8270D/SIM SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/Kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0209S1 SB SBD SB SBD SB SBD Naphthalene 0.0651 0.0690 0.0833 0.0833 78 83 60 - 107 6 21 Acenaphthylene 0.0666 0.0731 0.0833 0.0833 80 88 59 - 123 9 15 Acenaphthene 0.0703 0.0738 0.0833 0.0833 84 89 62 - 112 5 17 Fluorene 0.0763 0.0795 0.0833 0.0833 92 95 64 - 119 4 17 Phenanthrene 0.0717 0.0738 0.0833 0.0833 86 89 38 - 141 3 15 Anthracene 0.0743 0.0762 0.0833 0.0833 89 91 64 - 152 3 15 Fluoranthene 0.0755 0.0756 0.0833 0.0833 91 91 63 - 126 0 19 Pyrene 0.0748 0.0740 0.0833 0.0833 90 89 60 - 128 1 15 Benzo[a]anthracene 0.0833 0.0835 0.0833 0.0833 100 100 64 - 135 0 15 Chrysene 0.0771 0.0765 0.0833 0.0833 93 92 70 - 119 1 15 Benzo[b]fluoranthene 0.0785 0.0780 0.0833 0.0833 94 94 54 - 135 1 15 Benzo(j,k)fluoranthene 0.0743 0.0754 0.0833 0.0833 89 91 66 - 122 1 15 Benzo[a]pyrene 0.0743 0.0749 0.0833 0.0833 89 90 62 - 125 1 15 Indeno(1,2,3-c,d)pyrene 0.0732 0.0741 0.0833 0.0833 88 89 55 - 129 1 15 Dibenz[a,h]anthracene 0.0702 0.0743 0.0833 0.0833 84 89 58 - 125 6 15 Benzo[g,h,i]perylene 0.0740 0.0745 0.0833 0.0833 89 89 58 - 127 1 15 Surrogate: 2-Fluorobiphenyl 79 85 32 - 115 Pyrene-d10 88 89 35 - 129 Terphenyl-d14 91 91 33 - 114 68 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PCBs EPA 8082A Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-11:3.0 Laboratory ID: 02-076-01 Aroclor 1016 ND 0.059 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.059 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.059 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.059 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.059 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.059 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.059 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 79 40-134 Client ID: RTN001-11:11.0 Laboratory ID: 02-076-02 Aroclor 1016 ND 0.079 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.079 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.079 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.079 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.079 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.079 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.079 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 74 40-134 Client ID: RTN001-10:5.5 Laboratory ID: 02-076-03 Aroclor 1016 ND 0.081 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.081 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.081 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.081 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.081 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.081 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.081 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 74 40-134 69 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PCBs EPA 8082A Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:12.0 Laboratory ID: 02-076-04 Aroclor 1016 ND 0.072 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.072 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.072 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.072 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.072 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.072 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.072 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 74 40-134 Client ID: RTN001-9:5.0 Laboratory ID: 02-076-05 Aroclor 1016 ND 0.056 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.056 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.056 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.056 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.056 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.056 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.056 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 66 40-134 Client ID: RTN001-4:6.0 Laboratory ID: 02-076-07 Aroclor 1016 ND 0.057 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.057 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.057 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.057 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.057 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.057 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.057 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 83 40-134 70 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PCBs EPA 8082A Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-4:12.0 Laboratory ID: 02-076-08 Aroclor 1016 ND 0.073 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.073 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.073 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.073 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.073 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.073 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.073 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 79 40-134 Client ID: RTN001-2:9.5 Laboratory ID: 02-076-09 Aroclor 1016 ND 0.055 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.055 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.055 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.055 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.055 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.055 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.055 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 70 40-134 Client ID: RTN001-2:13.0 Laboratory ID: 02-076-10 Aroclor 1016 ND 0.060 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.060 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.060 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.060 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.060 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.060 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.060 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 74 40-134 71 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 PCBs EPA 8082A QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0209S1 Aroclor 1016 ND 0.050 EPA 8082A 2-9-18 2-12-18 Aroclor 1221 ND 0.050 EPA 8082A 2-9-18 2-12-18 Aroclor 1232 ND 0.050 EPA 8082A 2-9-18 2-12-18 Aroclor 1242 ND 0.050 EPA 8082A 2-9-18 2-12-18 Aroclor 1248 ND 0.050 EPA 8082A 2-9-18 2-12-18 Aroclor 1254 ND 0.050 EPA 8082A 2-9-18 2-12-18 Aroclor 1260 ND 0.050 EPA 8082A 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits DCB 95 40-134 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags MATRIX SPIKES Laboratory ID: 02-076-08 MS MSD MS MSD MS MSD Aroclor 1260 0.373 0.439 0.500 0.500 ND 75 88 34-126 16 16 Surrogate: DCB 81 93 40-134 72 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-01 Client ID: RTN001-11:3.0 Arsenic ND 12 6010D 2-9-18 2-9-18 Cadmium ND 0.59 6010D 2-9-18 2-9-18 Chromium 27 1.2 6010D 2-9-18 2-9-18 Lead 64 5.9 6010D 2-9-18 2-9-18 Mercury ND 0.29 7471B 2-8-18 2-8-18 Lab ID: 02-076-02 Client ID: RTN001-11:11.0 Arsenic ND 16 6010D 2-9-18 2-9-18 Cadmium ND 0.79 6010D 2-9-18 2-9-18 Chromium 46 1.6 6010D 2-9-18 2-9-18 Lead ND 7.9 6010D 2-9-18 2-9-18 Mercury ND 0.40 7471B 2-8-18 2-8-18 73 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-03 Client ID: RTN001-10:5.5 Arsenic ND 16 6010D 2-9-18 2-9-18 Barium 140 4.1 6010D 2-9-18 2-9-18 Cadmium ND 0.81 6010D 2-9-18 2-9-18 Chromium 45 1.6 6010D 2-9-18 2-9-18 Lead 44 8.1 6010D 2-9-18 2-9-18 Mercury ND 0.41 7471B 2-8-18 2-8-18 Selenium ND 16 6010D 2-9-18 2-9-18 Silver ND 1.6 6010D 2-9-18 2-9-18 Lab ID: 02-076-04 Client ID: RTN001-10:12.0 Arsenic ND 14 6010D 2-9-18 2-9-18 Barium 110 3.6 6010D 2-9-18 2-9-18 Cadmium ND 0.72 6010D 2-9-18 2-9-18 Chromium 42 1.4 6010D 2-9-18 2-9-18 Lead 13 7.2 6010D 2-9-18 2-9-18 Mercury ND 0.36 7471B 2-8-18 2-8-18 Selenium ND 14 6010D 2-9-18 2-9-18 Silver ND 1.4 6010D 2-9-18 2-9-18 74 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL LEAD EPA 6010D Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-05 Client ID: RTN001-9:5.0 Lead 8.2 5.6 6010D 2-9-18 2-9-18 Lab ID: 02-076-06 Client ID: RTN001-9:12.0 Lead ND 7.3 6010D 2-9-18 2-9-18 75 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-07 Client ID: RTN001-4:6.0 Arsenic ND 11 6010D 2-9-18 2-9-18 Barium 51 2.9 6010D 2-9-18 2-9-18 Cadmium ND 0.57 6010D 2-9-18 2-9-18 Chromium 29 1.1 6010D 2-9-18 2-9-18 Lead 19 5.7 6010D 2-9-18 2-9-18 Mercury ND 0.29 7471B 2-8-18 2-8-18 Selenium ND 11 6010D 2-9-18 2-9-18 Silver ND 1.1 6010D 2-9-18 2-9-18 Lab ID: 02-076-08 Client ID: RTN001-4:12.0 Arsenic ND 15 6010D 2-9-18 2-9-18 Barium 84 3.6 6010D 2-9-18 2-9-18 Cadmium ND 0.73 6010D 2-9-18 2-9-18 Chromium 37 1.5 6010D 2-9-18 2-9-18 Lead ND 7.3 6010D 2-9-18 2-9-18 Mercury ND 0.36 7471B 2-8-18 2-8-18 Selenium ND 15 6010D 2-9-18 2-9-18 Silver ND 1.5 6010D 2-9-18 2-9-18 76 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-11 Client ID: RTN001-1:6.0 Arsenic ND 15 6010D 2-9-18 2-9-18 Cadmium ND 0.74 6010D 2-9-18 2-9-18 Chromium 46 1.5 6010D 2-9-18 2-9-18 Lead ND 7.4 6010D 2-9-18 2-9-18 Mercury ND 0.37 7471B 2-8-18 2-8-18 Lab ID: 02-076-12 Client ID: RTN001-1:12.5 Arsenic ND 13 6010D 2-9-18 2-9-18 Cadmium ND 0.66 6010D 2-9-18 2-9-18 Chromium 40 1.3 6010D 2-9-18 2-9-18 Lead ND 6.6 6010D 2-9-18 2-9-18 Mercury ND 0.33 7471B 2-8-18 2-8-18 77 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D METHOD BLANK QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0209SM1 Analyte Method Result PQL Arsenic 6010D ND 10 Barium 6010D ND 2.5 Cadmium 6010D ND 0.50 Chromium 6010D ND 1.0 Lead 6010D ND 5.0 Selenium 6010D ND 10 Silver 6010D ND 1.0 78 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B METHOD BLANK QUALITY CONTROL Date Extracted: 2-8-18 Date Analyzed: 2-8-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0208S1 Analyte Method Result PQL Mercury 7471B ND 0.25 79 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D DUPLICATE QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-076-08 Sample Duplicate Analyte Result Result RPD PQL Flags Arsenic ND ND NA 10 Barium 57.6 55.3 4 2.5 Cadmium ND ND NA 0.50 Chromium 25.3 24.5 3 1.0 Lead ND ND NA 5.0 Selenium ND ND NA 10 Silver ND ND NA 1.0 80 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B DUPLICATE QUALITY CONTROL Date Extracted: 2-8-18 Date Analyzed: 2-8-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-062-01 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.25 81 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D MS/MSD QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-076-08 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Arsenic 100 94.2 94 98.5 99 5 Barium 100 154 97 161 104 5 Cadmium 50.0 45.1 90 47.1 94 4 Chromium 100 115 90 120 95 5 Lead 250 223 89 235 94 5 Selenium 100 90.1 90 94.8 95 5 Silver 25.0 20.3 81 21.3 85 5 82 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B MS/MSD QUALITY CONTROL Date Extracted: 2-8-18 Date Analyzed: 2-8-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-062-01 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 0.500 0.535 107 0.525 105 2 83 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-09 Client ID: RTN001-2:9.5 Arsenic ND 11 6010D 2-13-18 2-14-18 Cadmium ND 0.55 6010D 2-13-18 2-14-18 Chromium 21 0.55 6010D 2-13-18 2-14-18 Lead 13 5.5 6010D 2-13-18 2-14-18 Mercury ND 0.28 7471B 2-15-18 2-15-18 84 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D METHOD BLANK QUALITY CONTROL Date Extracted: 2-13-18 Date Analyzed: 2-13-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0213SM2 Analyte Method Result PQL Arsenic 6010D ND 10 Cadmium 6010D ND 0.50 Chromium 6010D ND 0.50 Lead 6010D ND 5.0 85 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B METHOD BLANK QUALITY CONTROL Date Extracted: 2-15-18 Date Analyzed: 2-15-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0215S1 Analyte Method Result PQL Mercury 7471B ND 0.25 86 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D DUPLICATE QUALITY CONTROL Date Extracted: 2-13-18 Date Analyzed: 2-13-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 03-130-01 Sample Duplicate Analyte Result Result RPD PQL Flags Arsenic ND ND NA 10 Cadmium ND ND NA 0.50 Chromium 36.9 44.3 18 0.50 Lead ND ND NA 5.0 87 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B DUPLICATE QUALITY CONTROL Date Extracted: 2-15-18 Date Analyzed: 2-15-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-083-01 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.25 88 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 6010D MS/MSD QUALITY CONTROL Date Extracted: 2-13-18 Date Analyzed: 2-13-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 03-130-01 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Arsenic 100 91.9 92 94.0 94 2 Cadmium 50.0 45.4 91 45.5 91 0 Chromium 100 123 87 122 85 1 Lead 250 213 85 213 85 0 89 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B MS/MSD QUALITY CONTROL Date Extracted: 2-15-18 Date Analyzed: 2-15-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-083-01 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 0.500 0.519 104 0.518 104 0 90 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-13 Client ID: RTN001-11:GW Arsenic 26 3.3 200.8 2-9-18 2-9-18 Cadmium ND 4.4 200.8 2-9-18 2-9-18 Chromium ND 11 200.8 2-9-18 2-9-18 Lead 1.2 1.1 200.8 2-9-18 2-9-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 Lab ID: 02-076-14 Client ID: RTN001-10:GW Arsenic 17 3.3 200.8 2-9-18 2-9-18 Barium 55 28 200.8 2-9-18 2-9-18 Cadmium ND 4.4 200.8 2-9-18 2-9-18 Chromium ND 11 200.8 2-9-18 2-9-18 Lead 1.9 1.1 200.8 2-9-18 2-9-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 Selenium ND 5.6 200.8 2-9-18 2-9-18 Silver ND 11 200.8 2-9-18 2-9-18 91 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-15 Client ID: RTN001-9:GW Lead 4.4 1.1 200.8 2-9-18 2-9-18 Lab ID: 02-076-16 Client ID: RTN001-4:GW Arsenic 23 3.3 200.8 2-9-18 2-9-18 Barium 74 28 200.8 2-9-18 2-9-18 Cadmium ND 4.4 200.8 2-9-18 2-9-18 Chromium 14 11 200.8 2-9-18 2-9-18 Lead 6.3 1.1 200.8 2-9-18 2-9-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 Selenium ND 5.6 200.8 2-9-18 2-9-18 Silver ND 11 200.8 2-9-18 2-9-18 92 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-17 Client ID: RTN001-2:GW Arsenic 22 3.3 200.8 2-9-18 2-9-18 Cadmium ND 4.4 200.8 2-9-18 2-9-18 Chromium 170 11 200.8 2-9-18 2-9-18 Lead 25 1.1 200.8 2-9-18 2-9-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 Lab ID: 02-076-18 Client ID: RTN001-1:GW Arsenic 56 3.3 200.8 2-9-18 2-9-18 Cadmium ND 4.4 200.8 2-9-18 2-9-18 Chromium 12 11 200.8 2-9-18 2-9-18 Lead 1.8 1.1 200.8 2-9-18 2-9-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 93 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 METHOD BLANK QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0209WM1 Analyte Method Result PQL Arsenic 200.8 ND 3.3 Barium 200.8 ND 28 Cadmium 200.8 ND 4.4 Chromium 200.8 ND 11 Lead 200.8 ND 1.1 Selenium 200.8 ND 5.6 Silver 200.8 ND 11 94 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A METHOD BLANK QUALITY CONTROL Date Extracted: 2-8-18 Date Analyzed: 2-8-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0208W1 Analyte Method Result PQL Mercury 7470A ND 0.50 95 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 DUPLICATE QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Water Units:ug/L (ppb) Lab ID: 01-296-07 Sample Duplicate Analyte Result Result RPD PQL Flags Arsenic ND ND NA 3.3 Barium ND ND NA 28 Cadmium ND ND NA 4.4 Chromium ND ND NA 11 Lead ND ND NA 1.1 Selenium ND ND NA 5.6 Silver ND ND NA 11 96 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A DUPLICATE QUALITY CONTROL Date Extracted: 2-8-18 Date Analyzed: 2-8-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-076-13 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.50 97 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 MS/MSD QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Water Units:ug/L (ppb) Lab ID: 01-296-07 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Arsenic 222 242 109 236 106 3 Barium 222 250 113 245 110 2 Cadmium 222 229 103 224 101 2 Chromium 222 214 97 209 94 3 Lead 222 231 104 224 101 3 Selenium 222 233 105 224 101 4 Silver 222 211 95 212 96 1 98 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A MS/MSD QUALITY CONTROL Date Extracted: 2-8-18 Date Analyzed: 2-8-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-062-01 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 0.500 0.535 107 0.525 105 2 99 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-13 Client ID: RTN001-11:GW Arsenic 4.8 3.0 200.8 2-8-18 2-8-18 Cadmium ND 4.0 200.8 2-8-18 2-8-18 Chromium ND 10 200.8 2-8-18 2-8-18 Lead ND 1.0 200.8 2-8-18 2-8-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 Lab ID: 02-076-14 Client ID: RTN001-10:GW Arsenic 7.3 3.0 200.8 2-8-18 2-8-18 Barium ND 25 200.8 2-8-18 2-8-18 Cadmium ND 4.0 200.8 2-8-18 2-8-18 Chromium ND 10 200.8 2-8-18 2-8-18 Lead ND 1.0 200.8 2-8-18 2-8-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 Selenium ND 5.0 200.8 2-8-18 2-8-18 Silver ND 10 200.8 2-8-18 2-8-18 100 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-15 Client ID: RTN001-9:GW Lead ND 1.0 200.8 2-8-18 2-8-18 Lab ID: 02-076-16 Client ID: RTN001-4:GW Arsenic 15 3.0 200.8 2-8-18 2-8-18 Barium ND 25 200.8 2-8-18 2-8-18 Cadmium ND 4.0 200.8 2-8-18 2-8-18 Chromium ND 10 200.8 2-8-18 2-8-18 Lead ND 1.0 200.8 2-8-18 2-8-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 Selenium ND 5.0 200.8 2-8-18 2-8-18 Silver ND 10 200.8 2-8-18 2-8-18 101 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-076-17 Client ID: RTN001-2:GW Arsenic ND 3.0 200.8 2-8-18 2-8-18 Cadmium ND 4.0 200.8 2-8-18 2-8-18 Chromium ND 10 200.8 2-8-18 2-8-18 Lead ND 1.0 200.8 2-8-18 2-8-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 Lab ID: 02-076-18 Client ID: RTN001-1:GW Arsenic 30 3.0 200.8 2-8-18 2-8-18 Cadmium ND 4.0 200.8 2-8-18 2-8-18 Chromium ND 10 200.8 2-8-18 2-8-18 Lead ND 1.0 200.8 2-8-18 2-8-18 Mercury ND 0.50 7470A 2-8-18 2-8-18 102 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 METHOD BLANK QUALITY CONTROL Date Filtered: 2-8-18 Date Analyzed: 2-8-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0208F1 Analyte Method Result PQL Arsenic 200.8 ND 3.0 Barium 200.8 ND 25 Cadmium 200.8 ND 4.0 Chromium 200.8 ND 10 Lead 200.8 ND 1.0 Selenium 200.8 ND 5.0 Silver 200.8 ND 5.0 103 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A METHOD BLANK QUALITY CONTROL Date Filtered: 2-8-18 Date Analyzed: 2-8-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0208F1 Analyte Method Result PQL Mercury 7470A ND 0.50 104 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 DUPLICATE QUALITY CONTROL Date Filtered: 2-8-18 Date Analyzed: 2-8-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-076-14 Sample Duplicate Analyte Result Result RPD PQL Flags Arsenic 7.25 6.20 16 3.0 Barium ND ND NA 25 Cadmium ND ND NA 4.0 Chromium ND ND NA 10 Lead ND ND NA 1.0 Selenium ND ND NA 5.0 Silver ND ND NA 10 105 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A DUPLICATE QUALITY CONTROL Date Filtered: 2-8-18 Date Analyzed: 2-8-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-076-13 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.50 106 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 MS/MSD QUALITY CONTROL Date Filtered: 2-8-18 Date Analyzed: 2-8-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-076-14 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Arsenic 200 201 97 207 100 3 Barium 200 198 99 199 100 1 Cadmium 200 184 92 193 97 5 Chromium 200 192 96 196 98 2 Lead 200 180 90 183 91 2 Selenium 200 190 95 194 97 2 Silver 400 370 93 345 86 7 107 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A MS/MSD QUALITY CONTROL Date Filtered: 2-8-18 Date Analyzed: 2-8-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-076-13 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 12.5 11.8 94 10.9 87 7 108 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 1,2-DIBROMOETHANE (EDB) EPA 8011 Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-10:GW Laboratory ID: 02-076-14 EDB ND 0.0097 EPA 8011 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits TCMX 89 25-143 Client ID: RTN001-4:GW Laboratory ID: 02-076-16 EDB ND 0.0097 EPA 8011 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits TCMX 87 25-143 Client ID: RTN001-2:GW Laboratory ID: 02-076-17 EDB ND 0.010 EPA 8011 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits TCMX 123 25-143 Client ID: RTN001-1:GW Laboratory ID: 02-076-18 EDB ND 0.0097 EPA 8011 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits TCMX 97 25-143 109 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 1,2-DIBROMOETHANE (EDB) EPA 8011 QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0208W1 EDB ND 0.010 EPA 8011 2-8-18 2-8-18 Surrogate: Percent Recovery Control Limits TCMX 116 25-143 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0208W1 SB SBD SB SBD SB SBD EDB 0.0971 0.0987 0.100 0.100 N/A 97 99 72-135 2 10 Surrogate: TCMX 113 113 25-143 110 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 8, 2018 Laboratory Reference: 1802-076 Project: 21-1-16700-301 % MOISTURE Date Analyzed: 2-8-18 Client ID Lab ID % Moisture RTN001-11:3.0 02-076-01 15 RTN001-11:11.0 02-076-02 37 RTN001-10:5.5 02-076-03 39 RTN001-10:12.0 02-076-04 30 RTN001-9:5.0 02-076-05 10 RTN001-9:12.0 02-076-06 32 RTN001-4:6.0 02-076-07 13 RTN001-4:12.0 02-076-08 31 RTN001-2:9.5 02-076-09 9 RTN001-2:13.0 02-076-10 17 RTN001-1:6.0 02-076-11 32 RTN001-1:12.5 02-076-12 24 111 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 February 14, 2018 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 21-1-16700-301 Laboratory Reference No. 1802-099 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on February 9, 2018. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 Case Narrative Samples were collected on February 8 and 9, 2018 and received by the laboratory on February 9, 2018. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. Volatiles EPA 8260C Analysis Some MTCA Method A cleanup levels are non-achievable for sample RTN001-5:10.5 due to the necessary dilution of the sample. PAHs EPA 8270D/SIM Analysis Samples RTN001-6:12.0, RTN002-1:4.0, and RTN002-3:4.7 each had one surrogate recovery out of control limits. This is within allowance of our standard operating procedure as long as the recovery is above 10%. Please note that any other QA/QC issues associated with these extractions and analyses will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-HCID Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:4.7 Laboratory ID: 02-099-21 Gasoline Range Organics ND 26 NWTPH-HCID 2-12-18 2-12-18 Diesel Fuel #2 Detected 64 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Detected 130 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 103 50-150 Client ID: RTN002-3:9.0 Laboratory ID: 02-099-22 Gasoline Range Organics ND 28 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 71 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 140 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-HCID QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212S3 Gasoline Range Organics ND 20 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 50 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 100 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-HCID Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:GW Laboratory ID: 02-099-23 Gasoline Range Organics ND 0.11 NWTPH-HCID 2-9-18 2-12-18 Diesel Range Organics Detected 0.28 NWTPH-HCID 2-9-18 2-12-18 Lube Oil Range Organics ND 0.45 NWTPH-HCID 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-HCID QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0209W1 Gasoline Range Organics ND 0.10 NWTPH-HCID 2-9-18 2-12-18 Diesel Range Organics ND 0.25 NWTPH-HCID 2-9-18 2-12-18 Lube Oil Range Organics ND 0.40 NWTPH-HCID 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 103 50-150 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:5.0 Laboratory ID: 02-099-04 Gasoline ND 8.5 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 104 66-130 Client ID: RTN001-6:12.0 Laboratory ID: 02-099-05 Gasoline ND 7.0 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 92 66-130 Client ID: RTN001-7:7.0 Laboratory ID: 02-099-07 Gasoline ND 6.0 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 99 66-130 Client ID: RTN001-7:11.0 Laboratory ID: 02-099-08 Gasoline ND 6.1 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 90 66-130 Client ID: RTN001-3:5.0 Laboratory ID: 02-099-15 Gasoline ND 6.2 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 111 66-130 Client ID: RTN001-3:8.0 Laboratory ID: 02-099-16 Gasoline ND 6.8 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 92 66-130 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0209S1 Gasoline ND 5.0 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 90 66-130 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-098-03 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 93 93 66-130 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:GW Laboratory ID: 02-099-06 Gasoline ND 100 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 83 66-114 Client ID: RTN001-7:GW Laboratory ID: 02-099-09 Gasoline ND 100 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 83 66-114 Client ID: RTN001-3:GW Laboratory ID: 02-099-17 Gasoline ND 100 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 84 66-114 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0209W1 Gasoline ND 100 NWTPH-Gx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 86 66-114 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-099-06 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 83 87 66-114 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:6.5 Laboratory ID: 02-099-01 Diesel Range Organics 240 160 NWTPH-Dx 2-9-18 2-12-18 N Lube Oil 1700 310 NWTPH-Dx 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 98 50-150 Client ID: RTN001-5:10.5 Laboratory ID: 02-099-02 Diesel Range Organics 3900 1500 NWTPH-Dx 2-9-18 2-12-18 N Lube Oil 28000 3000 NWTPH-Dx 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl --- 50-150 S Client ID: RTN001-6:5.0 Laboratory ID: 02-099-04 Diesel Range Organics ND 36 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 73 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 72 50-150 Client ID: RTN001-6:12.0 Laboratory ID: 02-099-05 Diesel Range Organics 39 34 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics 96 68 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 102 50-150 Client ID: RTN001-7:7.0 Laboratory ID: 02-099-07 Diesel Range Organics ND 31 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 62 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 78 50-150 Client ID: RTN001-7:11.0 Laboratory ID: 02-099-08 Diesel Range Organics ND 32 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 64 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 92 50-150 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-8:10.0 Laboratory ID: 02-099-10 Diesel Range Organics ND 37 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 75 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 85 50-150 Client ID: RTN002-1:4.0 Laboratory ID: 02-099-12 Diesel Range Organics ND 28 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics 67 55 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 87 50-150 Client ID: RTN002-1:10.5 Laboratory ID: 02-099-13 Diesel Range Organics ND 35 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 71 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 56 50-150 Client ID: RTN001-3:5.0 Laboratory ID: 02-099-15 Diesel Range Organics ND 33 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 67 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 63 50-150 Client ID: RTN001-3:8.0 Laboratory ID: 02-099-16 Diesel Range Organics ND 34 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 68 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 99 50-150 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0209S3 Diesel Range Organics ND 25 NWTPH-Dx 2-9-18 2-12-18 Lube Oil Range Organics ND 50 NWTPH-Dx 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-099-05 ORIG DUP Diesel Range Organics 28.6 ND NA NA NA NA NA NA Lube Oil Range Organics 70.1 ND NA NA NA NA NA NA Surrogate: o-Terphenyl 102 96 50-150 Laboratory ID: 02-099-07 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 78 103 50-150 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:GW Laboratory ID: 02-099-03 Diesel Range Organics 3.3 2.7 NWTPH-Dx 2-9-18 2-12-18 N Lube Oil 16 4.4 NWTPH-Dx 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl --- 50-150 S Client ID: RTN001-6:GW Laboratory ID: 02-099-06 Diesel Range Organics 0.97 0.27 NWTPH-Dx 2-9-18 2-9-18 N Lube Oil Range Organics 1.8 0.43 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 79 50-150 Client ID: RTN001-7:GW Laboratory ID: 02-099-09 Diesel Range Organics 0.82 0.29 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics 0.54 0.47 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 80 50-150 Client ID: RTN001-8:GW Laboratory ID: 02-099-11 Diesel Range Organics 0.48 0.28 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics 0.59 0.45 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 Client ID: RTN002-1:GW Laboratory ID: 02-099-14 Diesel Range Organics 0.64 0.29 NWTPH-Dx 2-9-18 2-9-18 N Lube Oil Range Organics 1.2 0.47 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 83 50-150 Client ID: RTN001-3:GW Laboratory ID: 02-099-17 Diesel Range Organics 0.32 0.28 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 0.44 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 83 50-150 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:GW Laboratory ID: 02-099-23 Diesel Range Organics 0.30 0.28 NWTPH-Dx 2-9-18 2-12-18 Lube Oil Range Organics ND 0.45 NWTPH-Dx 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0209W1 Diesel Range Organics ND 0.25 NWTPH-Dx 2-9-18 2-9-18 Lube Oil Range Organics ND 0.40 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 94 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-099-17 ORIG DUP Diesel Range Organics 0.315 0.309 NA NA NA NA 2 NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 83 90 50-150 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:4.7 Laboratory ID: 02-099-21 Diesel Fuel #2 1700 160 NWTPH-Dx 2-9-18 2-9-18 Lube Oil 2500 320 NWTPH-Dx 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 113 50-150 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0209S3 Diesel Range Organics ND 25 NWTPH-Dx 2-9-18 2-12-18 Lube Oil Range Organics ND 50 NWTPH-Dx 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-099-07 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 78 103 50-150 19 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:6.5 Laboratory ID: 02-099-01 Dichlorodifluoromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0051 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0051 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Acetone 0.052 0.0051 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0051 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0051 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0051 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Butanone 0.0068 0.0051 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0051 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0051 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0051 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 20 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:6.5 Laboratory ID: 02-099-01 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0051 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.0051 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0051 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.0051 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0051 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene 0.0015 0.0010 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene 0.0063 0.0010 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene 0.0026 0.0010 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene 0.0018 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0051 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0051 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 97 75-131 Toluene-d8 99 83-130 4-Bromofluorobenzene 130 78-130 21 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:10.5 Laboratory ID: 02-099-02 Dichlorodifluoromethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Chloromethane ND 0.33 EPA 8260C 2-9-18 2-12-18 Vinyl Chloride ND 0.066 EPA 8260C 2-9-18 2-12-18 Bromomethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Chloroethane ND 0.33 EPA 8260C 2-9-18 2-12-18 Trichlorofluoromethane ND 0.066 EPA 8260C 2-9-18 2-12-18 1,1-Dichloroethene ND 0.066 EPA 8260C 2-9-18 2-12-18 Acetone ND 0.33 EPA 8260C 2-9-18 2-12-18 Iodomethane ND 0.33 EPA 8260C 2-9-18 2-12-18 Carbon Disulfide ND 0.066 EPA 8260C 2-9-18 2-12-18 Methylene Chloride ND 0.33 EPA 8260C 2-9-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.066 EPA 8260C 2-9-18 2-12-18 Methyl t-Butyl Ether ND 0.066 EPA 8260C 2-9-18 2-12-18 1,1-Dichloroethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Vinyl Acetate ND 0.33 EPA 8260C 2-9-18 2-12-18 2,2-Dichloropropane ND 0.066 EPA 8260C 2-9-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.066 EPA 8260C 2-9-18 2-12-18 2-Butanone ND 0.33 EPA 8260C 2-9-18 2-12-18 Bromochloromethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Chloroform ND 0.066 EPA 8260C 2-9-18 2-12-18 1,1,1-Trichloroethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Carbon Tetrachloride ND 0.066 EPA 8260C 2-9-18 2-12-18 1,1-Dichloropropene ND 0.066 EPA 8260C 2-9-18 2-12-18 Benzene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,2-Dichloroethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Trichloroethene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,2-Dichloropropane ND 0.066 EPA 8260C 2-9-18 2-12-18 Dibromomethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Bromodichloromethane ND 0.066 EPA 8260C 2-9-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.33 EPA 8260C 2-9-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.066 EPA 8260C 2-9-18 2-12-18 Methyl Isobutyl Ketone ND 0.33 EPA 8260C 2-9-18 2-12-18 Toluene ND 0.33 EPA 8260C 2-9-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.066 EPA 8260C 2-9-18 2-12-18 22 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:10.5 Laboratory ID: 02-099-02 1,1,2-Trichloroethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Tetrachloroethene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,3-Dichloropropane ND 0.066 EPA 8260C 2-9-18 2-12-18 2-Hexanone ND 0.33 EPA 8260C 2-9-18 2-12-18 Dibromochloromethane ND 0.066 EPA 8260C 2-9-18 2-12-18 1,2-Dibromoethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Chlorobenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.066 EPA 8260C 2-9-18 2-12-18 Ethylbenzene ND 0.33 EPA 8260C 2-9-18 2-12-18 m,p-Xylene ND 0.33 EPA 8260C 2-9-18 2-12-18 o-Xylene ND 0.33 EPA 8260C 2-9-18 2-12-18 Styrene ND 0.066 EPA 8260C 2-9-18 2-12-18 Bromoform ND 0.33 EPA 8260C 2-9-18 2-12-18 Isopropylbenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 Bromobenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.066 EPA 8260C 2-9-18 2-12-18 1,2,3-Trichloropropane ND 0.066 EPA 8260C 2-9-18 2-12-18 n-Propylbenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 2-Chlorotoluene ND 0.066 EPA 8260C 2-9-18 2-12-18 4-Chlorotoluene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,3,5-Trimethylbenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 tert-Butylbenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,2,4-Trimethylbenzene 1.2 0.066 EPA 8260C 2-9-18 2-12-18 sec-Butylbenzene 0.074 0.066 EPA 8260C 2-9-18 2-12-18 1,3-Dichlorobenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 p-Isopropyltoluene 0.17 0.066 EPA 8260C 2-9-18 2-12-18 1,4-Dichlorobenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,2-Dichlorobenzene 0.30 0.066 EPA 8260C 2-9-18 2-12-18 n-Butylbenzene 0.36 0.066 EPA 8260C 2-9-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.33 EPA 8260C 2-9-18 2-12-18 1,2,4-Trichlorobenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 Hexachlorobutadiene ND 0.33 EPA 8260C 2-9-18 2-12-18 Naphthalene ND 0.066 EPA 8260C 2-9-18 2-12-18 1,2,3-Trichlorobenzene ND 0.066 EPA 8260C 2-9-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 96 75-131 Toluene-d8 105 83-130 4-Bromofluorobenzene 108 78-130 23 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:5.0 Laboratory ID: 02-099-04 Dichlorodifluoromethane ND 0.0020 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0089 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.0013 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0066 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.0013 EPA 8260C 2-9-18 2-9-18 Acetone 0.015 0.0066 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0097 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0017 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0066 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.0013 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0066 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.0013 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.0013 EPA 8260C 2-9-18 2-9-18 2-Butanone ND 0.0066 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.0013 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0066 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.0013 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0066 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0066 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.0013 EPA 8260C 2-9-18 2-9-18 24 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:5.0 Laboratory ID: 02-099-04 1,1,2-Trichloroethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.0013 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0066 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0066 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0066 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0066 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.0013 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0066 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.0013 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.0013 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0066 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0066 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.0013 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.0013 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 109 75-131 Toluene-d8 103 83-130 4-Bromofluorobenzene 81 78-130 25 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:12.0 Laboratory ID: 02-099-05 Dichlorodifluoromethane ND 0.0016 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0071 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0053 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Acetone 0.037 0.0053 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0078 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0014 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0053 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0053 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Butanone 0.0088 0.0053 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0053 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0053 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0053 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 26 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:12.0 Laboratory ID: 02-099-05 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0053 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0053 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0053 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0053 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0053 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0053 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0053 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 107 75-131 Toluene-d8 102 83-130 4-Bromofluorobenzene 85 78-130 27 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-7:7.0 Laboratory ID: 02-099-07 Dichlorodifluoromethane ND 0.0016 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0072 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0054 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Acetone 0.0055 0.0054 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0078 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0014 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0054 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0054 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Butanone ND 0.0054 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0054 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0054 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0054 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 28 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-7:7.0 Laboratory ID: 02-099-07 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0054 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0054 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0054 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0054 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0054 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0054 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0054 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 109 75-131 Toluene-d8 103 83-130 4-Bromofluorobenzene 84 78-130 29 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-7:11.0 Laboratory ID: 02-099-08 Dichlorodifluoromethane ND 0.0015 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0065 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.00097 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0049 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.00097 EPA 8260C 2-9-18 2-9-18 Acetone 0.017 0.0049 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0071 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0013 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0049 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.00097 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0049 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.00097 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.00097 EPA 8260C 2-9-18 2-9-18 2-Butanone ND 0.0049 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.00097 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0049 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.00097 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0049 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0049 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.00097 EPA 8260C 2-9-18 2-9-18 30 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-7:11.0 Laboratory ID: 02-099-08 1,1,2-Trichloroethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.00097 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0049 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0049 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0049 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0049 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.00097 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0049 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.00097 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.00097 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0049 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0049 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.00097 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.00097 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 110 75-131 Toluene-d8 104 83-130 4-Bromofluorobenzene 87 78-130 31 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-8:10.0 Laboratory ID: 02-099-10 Dichlorodifluoromethane ND 0.0016 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0070 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.0010 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0052 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Acetone 0.027 0.0052 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0076 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0014 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0052 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0052 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.0010 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 2-Butanone ND 0.0052 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0052 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0052 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0052 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-9-18 2-9-18 32 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-8:10.0 Laboratory ID: 02-099-10 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.0010 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0052 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0052 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0052 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0052 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0052 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.0010 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0052 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0052 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 111 75-131 Toluene-d8 102 83-130 4-Bromofluorobenzene 83 78-130 33 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-1:4.0 Laboratory ID: 02-099-12 Dichlorodifluoromethane ND 0.0013 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0057 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.00085 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0042 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.00085 EPA 8260C 2-9-18 2-9-18 Acetone 0.0053 0.0042 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0062 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0042 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.00085 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0042 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.00085 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.00085 EPA 8260C 2-9-18 2-9-18 2-Butanone ND 0.0042 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.00085 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0042 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.00085 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0042 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0042 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.00085 EPA 8260C 2-9-18 2-9-18 34 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-1:4.0 Laboratory ID: 02-099-12 1,1,2-Trichloroethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.00085 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0042 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0042 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0042 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0042 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.00085 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0042 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.00085 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.00085 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0042 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0042 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.00085 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.00085 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 115 75-131 Toluene-d8 107 83-130 4-Bromofluorobenzene 86 78-130 35 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-1:10.5 Laboratory ID: 02-099-13 Dichlorodifluoromethane ND 0.0017 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0077 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0057 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Acetone 0.11 0.0057 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0084 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0015 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0057 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0057 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Butanone 0.026 0.0057 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0057 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0057 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0057 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 36 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-1:10.5 Laboratory ID: 02-099-13 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0057 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0057 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0057 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0057 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0057 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0057 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0057 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 113 75-131 Toluene-d8 103 83-130 4-Bromofluorobenzene 82 78-130 37 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-3:5.0 Laboratory ID: 02-099-15 Dichlorodifluoromethane ND 0.0017 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0075 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0056 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Acetone 0.061 0.0056 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0082 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0015 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0056 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0056 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Butanone 0.014 0.0056 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0056 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0056 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0056 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 38 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-3:5.0 Laboratory ID: 02-099-15 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0056 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0056 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0056 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0056 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0056 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0056 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0056 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 110 75-131 Toluene-d8 102 83-130 4-Bromofluorobenzene 82 78-130 39 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-3:8.0 Laboratory ID: 02-099-16 Dichlorodifluoromethane ND 0.0017 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0074 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0055 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Acetone 0.068 0.0055 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0081 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0014 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0055 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0055 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Butanone 0.017 0.0055 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0055 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0055 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0055 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-9-18 2-9-18 40 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-3:8.0 Laboratory ID: 02-099-16 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0055 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0055 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0055 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0055 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0055 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0055 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0055 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.0011 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 113 75-131 Toluene-d8 105 83-130 4-Bromofluorobenzene 83 78-130 41 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:4.7 Laboratory ID: 02-099-21 Dichlorodifluoromethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0042 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.00084 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0042 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.00084 EPA 8260C 2-12-18 2-12-18 Acetone 0.036 0.0042 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0042 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide 0.0038 0.00084 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0042 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.00084 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0042 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.00084 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.00084 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 0.0042 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.00084 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0042 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.00084 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0042 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0042 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.00084 EPA 8260C 2-12-18 2-12-18 42 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:4.7 Laboratory ID: 02-099-21 1,1,2-Trichloroethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.00084 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0042 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.0042 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0042 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.0042 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.00084 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0042 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.00084 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.00084 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0042 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0042 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.00084 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.00084 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 124 75-131 Toluene-d8 120 83-130 4-Bromofluorobenzene 106 78-130 43 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:9.0 Laboratory ID: 02-099-22 Dichlorodifluoromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0055 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0055 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Acetone 0.045 0.0055 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0055 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.0011 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0055 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0055 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 0.0055 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0055 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0055 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0055 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-12-18 2-12-18 44 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:9.0 Laboratory ID: 02-099-22 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0055 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.0055 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0055 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.0055 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0055 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.0011 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0055 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0055 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 123 75-131 Toluene-d8 124 83-130 4-Bromofluorobenzene 120 78-130 45 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0209S1 Dichlorodifluoromethane ND 0.0015 EPA 8260C 2-9-18 2-9-18 Chloromethane ND 0.0067 EPA 8260C 2-9-18 2-9-18 Vinyl Chloride ND 0.0010 EPA 8260C 2-9-18 2-9-18 Bromomethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Chloroethane ND 0.0050 EPA 8260C 2-9-18 2-9-18 Trichlorofluoromethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Acetone ND 0.0050 EPA 8260C 2-9-18 2-9-18 Iodomethane ND 0.0073 EPA 8260C 2-9-18 2-9-18 Carbon Disulfide ND 0.0013 EPA 8260C 2-9-18 2-9-18 Methylene Chloride ND 0.0050 EPA 8260C 2-9-18 2-9-18 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1-Dichloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Vinyl Acetate ND 0.0050 EPA 8260C 2-9-18 2-9-18 2,2-Dichloropropane ND 0.0010 EPA 8260C 2-9-18 2-9-18 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 2-Butanone ND 0.0050 EPA 8260C 2-9-18 2-9-18 Bromochloromethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Chloroform ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Carbon Tetrachloride ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1-Dichloropropene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Benzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dichloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Trichloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dichloropropane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Dibromomethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Bromodichloromethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260C 2-9-18 2-9-18 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Methyl Isobutyl Ketone ND 0.0050 EPA 8260C 2-9-18 2-9-18 Toluene ND 0.0050 EPA 8260C 2-9-18 2-9-18 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-9-18 2-9-18 46 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0209S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Tetrachloroethene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,3-Dichloropropane ND 0.0010 EPA 8260C 2-9-18 2-9-18 2-Hexanone ND 0.0050 EPA 8260C 2-9-18 2-9-18 Dibromochloromethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dibromoethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Chlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 Ethylbenzene ND 0.0050 EPA 8260C 2-9-18 2-9-18 m,p-Xylene ND 0.0050 EPA 8260C 2-9-18 2-9-18 o-Xylene ND 0.0050 EPA 8260C 2-9-18 2-9-18 Styrene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Bromoform ND 0.0050 EPA 8260C 2-9-18 2-9-18 Isopropylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Bromobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 2-9-18 2-9-18 n-Propylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 2-Chlorotoluene ND 0.0010 EPA 8260C 2-9-18 2-9-18 4-Chlorotoluene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 tert-Butylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 sec-Butylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 p-Isopropyltoluene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 n-Butylbenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260C 2-9-18 2-9-18 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Hexachlorobutadiene ND 0.0050 EPA 8260C 2-9-18 2-9-18 Naphthalene ND 0.0010 EPA 8260C 2-9-18 2-9-18 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 115 75-131 Toluene-d8 108 83-130 4-Bromofluorobenzene 87 78-130 47 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0212S1 Dichlorodifluoromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0050 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0050 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Acetone ND 0.0050 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0050 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0050 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0050 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 0.0050 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0050 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0050 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 48 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0212S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0050 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.0050 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0050 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.0050 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0050 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0050 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 75-131 Toluene-d8 99 83-130 4-Bromofluorobenzene 100 78-130 49 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0209S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0424 0.0454 0.0500 0.0500 85 91 58-126 7 20 Benzene 0.0488 0.0519 0.0500 0.0500 98 104 72-122 6 19 Trichloroethene 0.0421 0.0454 0.0500 0.0500 84 91 75-120 8 20 Toluene 0.0469 0.0489 0.0500 0.0500 94 98 78-123 4 19 Chlorobenzene 0.0500 0.0532 0.0500 0.0500 100 106 75-120 6 18 Surrogate: Dibromofluoromethane 119 110 75-131 Toluene-d8 111 103 83-130 4-Bromofluorobenzene 92 85 78-130 50 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0212S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0426 0.0412 0.0500 0.0500 85 82 58-126 3 20 Benzene 0.0523 0.0505 0.0500 0.0500 105 101 72-122 4 19 Trichloroethene 0.0463 0.0438 0.0500 0.0500 93 88 75-120 6 20 Toluene 0.0505 0.0482 0.0500 0.0500 101 96 78-123 5 19 Chlorobenzene 0.0466 0.0449 0.0500 0.0500 93 90 75-120 4 18 Surrogate: Dibromofluoromethane 101 99 75-131 Toluene-d8 102 98 83-130 4-Bromofluorobenzene 100 97 78-130 51 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:GW Laboratory ID: 02-099-03 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 52 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:GW Laboratory ID: 02-099-03 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene 1.2 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene 1.0 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene 0.26 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene 0.98 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene 6.2 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene 0.41 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene 2.7 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene 0.61 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 96 75-127 Toluene-d8 96 80-127 4-Bromofluorobenzene 101 78-125 53 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:GW Laboratory ID: 02-099-06 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 54 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:GW Laboratory ID: 02-099-06 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene 0.33 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 103 75-127 Toluene-d8 98 80-127 4-Bromofluorobenzene 103 78-125 55 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-7:GW Laboratory ID: 02-099-09 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 56 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-7:GW Laboratory ID: 02-099-09 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene 0.23 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 75-127 Toluene-d8 98 80-127 4-Bromofluorobenzene 100 78-125 57 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-8:GW Laboratory ID: 02-099-11 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 58 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-8:GW Laboratory ID: 02-099-11 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene 0.53 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 99 75-127 Toluene-d8 97 80-127 4-Bromofluorobenzene 100 78-125 59 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-1:GW Laboratory ID: 02-099-14 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 60 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-1:GW Laboratory ID: 02-099-14 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene 0.26 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 75-127 Toluene-d8 98 80-127 4-Bromofluorobenzene 102 78-125 61 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-3:GW Laboratory ID: 02-099-17 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 62 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-3:GW Laboratory ID: 02-099-17 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 75-127 Toluene-d8 98 80-127 4-Bromofluorobenzene 102 78-125 63 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:GW Laboratory ID: 02-099-23 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 64 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:GW Laboratory ID: 02-099-23 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 104 75-127 Toluene-d8 97 80-127 4-Bromofluorobenzene 102 78-125 65 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: Trip Blank Laboratory ID: 02-099-24 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 66 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: Trip Blank Laboratory ID: 02-099-24 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 97 75-127 Toluene-d8 99 80-127 4-Bromofluorobenzene 100 78-125 67 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0212W1 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 2.7 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 1.0 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Acetone ND 5.0 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 1.3 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.20 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 1.0 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 5.0 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 1.6 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-12-18 2-12-18 Toluene ND 1.0 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-12-18 2-12-18 68 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0212W1 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 2.0 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.40 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.20 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromoform ND 1.0 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 1.0 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 100 75-127 Toluene-d8 97 80-127 4-Bromofluorobenzene 99 78-125 69 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 VOLATILES EPA 8260C SB/SBD QUALITY CONTROL Matrix: Water Units: ug/L Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0212W1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 10.1 9.65 10.0 10.0 101 97 63-126 5 21 Benzene 10.3 10.0 10.0 10.0 103 100 78-122 3 19 Trichloroethene 10.2 9.76 10.0 10.0 102 98 63-120 4 20 Toluene 10.5 10.2 10.0 10.0 105 102 79-124 3 19 Chlorobenzene 10.4 10.1 10.0 10.0 104 101 78-120 3 19 Surrogate: Dibromofluoromethane 95 99 75-127 Toluene-d8 97 97 80-127 4-Bromofluorobenzene 97 100 78-125 70 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:6.5 Laboratory ID: 02-099-01 Naphthalene 0.062 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 2-Methylnaphthalene 0.52 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 1-Methylnaphthalene 0.41 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthylene 0.014 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthene 0.038 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 Fluorene 0.031 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 Phenanthrene 0.10 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 Anthracene 0.024 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 Fluoranthene 0.10 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 Pyrene 0.23 0.0083 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]anthracene ND 0.041 EPA 8270D/SIM 2-12-18 2-13-18 Chrysene ND 0.041 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[b]fluoranthene ND 0.041 EPA 8270D/SIM 2-12-18 2-13-18 Benzo(j,k)fluoranthene ND 0.041 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]pyrene ND 0.041 EPA 8270D/SIM 2-12-18 2-13-18 Indeno(1,2,3-c,d)pyrene ND 0.041 EPA 8270D/SIM 2-12-18 2-13-18 Dibenz[a,h]anthracene ND 0.041 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[g,h,i]perylene ND 0.041 EPA 8270D/SIM 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 79 32 - 115 Pyrene-d10 124 35 - 129 Terphenyl-d14 87 33 - 114 71 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:10.5 Laboratory ID: 02-099-02 Naphthalene 0.15 0.079 EPA 8270D/SIM 2-12-18 2-13-18 2-Methylnaphthalene 0.29 0.079 EPA 8270D/SIM 2-12-18 2-13-18 1-Methylnaphthalene 0.87 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthylene ND 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthene 0.087 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Fluorene 0.13 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Phenanthrene 0.22 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Anthracene ND 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Fluoranthene 0.14 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Pyrene 0.31 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]anthracene ND 0.16 EPA 8270D/SIM 2-12-18 2-13-18 Chrysene ND 0.16 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[b]fluoranthene ND 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Benzo(j,k)fluoranthene ND 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]pyrene ND 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Indeno(1,2,3-c,d)pyrene ND 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Dibenz[a,h]anthracene ND 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[g,h,i]perylene ND 0.079 EPA 8270D/SIM 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 85 32 - 115 Pyrene-d10 78 35 - 129 Terphenyl-d14 89 33 - 114 72 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:12.0 Laboratory ID: 02-099-05 Naphthalene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 2-Methylnaphthalene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 1-Methylnaphthalene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthylene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Fluorene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Phenanthrene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Anthracene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Fluoranthene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Pyrene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]anthracene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Chrysene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[b]fluoranthene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Benzo(j,k)fluoranthene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]pyrene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Indeno(1,2,3-c,d)pyrene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Dibenz[a,h]anthracene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[g,h,i]perylene ND 0.0091 EPA 8270D/SIM 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 80 32 - 115 Pyrene-d10 73 35 - 129 Terphenyl-d14 146 33 - 114 Q 73 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-1:4.0 Laboratory ID: 02-099-12 Naphthalene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 2-Methylnaphthalene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 1-Methylnaphthalene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthylene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Fluorene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Phenanthrene 0.0075 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Anthracene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Fluoranthene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Pyrene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]anthracene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Chrysene 0.062 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[b]fluoranthene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Benzo(j,k)fluoranthene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]pyrene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Indeno(1,2,3-c,d)pyrene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Dibenz[a,h]anthracene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[g,h,i]perylene ND 0.0074 EPA 8270D/SIM 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 82 32 - 115 Pyrene-d10 79 35 - 129 Terphenyl-d14 136 33 - 114 Q 74 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-3:4.7 Laboratory ID: 02-099-21 Naphthalene 0.34 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 2-Methylnaphthalene 0.29 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 1-Methylnaphthalene 0.23 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthylene 0.023 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthene 0.032 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Fluorene 0.066 0.042 EPA 8270D/SIM 2-12-18 2-13-18 Phenanthrene 0.19 0.042 EPA 8270D/SIM 2-12-18 2-13-18 Anthracene 0.047 0.042 EPA 8270D/SIM 2-12-18 2-13-18 Fluoranthene 0.14 0.042 EPA 8270D/SIM 2-12-18 2-13-18 Pyrene 0.12 0.042 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]anthracene 0.037 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Chrysene 0.056 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[b]fluoranthene 0.044 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Benzo(j,k)fluoranthene 0.015 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]pyrene 0.031 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Indeno(1,2,3-c,d)pyrene 0.029 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Dibenz[a,h]anthracene 0.0089 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[g,h,i]perylene 0.042 0.0085 EPA 8270D/SIM 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 65 32 - 115 Pyrene-d10 59 35 - 129 Terphenyl-d14 128 33 - 114 Q 75 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PAHs EPA 8270D/SIM METHOD BLANK QUALITY CONTROL Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0212S1 Naphthalene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 2-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 1-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthylene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Acenaphthene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Fluorene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Phenanthrene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Anthracene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Fluoranthene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Pyrene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]anthracene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Chrysene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[b]fluoranthene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Benzo(j,k)fluoranthene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[a]pyrene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Indeno(1,2,3-c,d)pyrene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Dibenz[a,h]anthracene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Benzo[g,h,i]perylene ND 0.0067 EPA 8270D/SIM 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 85 32 - 115 Pyrene-d10 94 35 - 129 Terphenyl-d14 97 33 - 114 76 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PAHs EPA 8270D/SIM MS/MSD QUALITY CONTROL Matrix: Soil Units: mg/Kg Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags MATRIX SPIKES Laboratory ID: 02-119-01 MS MSD MS MSD MS MSD Naphthalene 0.0711 0.0737 0.0833 0.0833 ND 85 88 29 - 116 4 31 Acenaphthylene 0.0768 0.0780 0.0833 0.0833 ND 92 94 38 - 122 2 23 Acenaphthene 0.0799 0.0822 0.0833 0.0833 ND 96 99 34 - 117 3 24 Fluorene 0.0775 0.0807 0.0833 0.0833 ND 93 97 40 - 124 4 22 Phenanthrene 0.0777 0.0789 0.0833 0.0833 ND 93 95 27 - 123 2 24 Anthracene 0.0791 0.0803 0.0833 0.0833 ND 95 96 47 - 148 2 21 Fluoranthene 0.0817 0.0834 0.0833 0.0833 ND 98 100 22 - 133 2 23 Pyrene 0.0835 0.0844 0.0833 0.0833 ND 100 101 23 - 133 1 24 Benzo[a]anthracene 0.0878 0.0895 0.0833 0.0833 ND 105 107 27 - 143 2 23 Chrysene 0.0814 0.0818 0.0833 0.0833 ND 98 98 22 - 130 0 24 Benzo[b]fluoranthene 0.0770 0.0848 0.0833 0.0833 ND 92 102 15 - 141 10 26 Benzo(j,k)fluoranthene 0.0812 0.0776 0.0833 0.0833 ND 97 93 42 - 112 5 24 Benzo[a]pyrene 0.0791 0.0812 0.0833 0.0833 ND 95 97 33 - 126 3 26 Indeno(1,2,3-c,d)pyrene 0.0817 0.0839 0.0833 0.0833 ND 98 101 30 - 125 3 25 Dibenz[a,h]anthracene 0.0834 0.0856 0.0833 0.0833 ND 100 103 31 - 124 3 22 Benzo[g,h,i]perylene 0.0796 0.0809 0.0833 0.0833 ND 96 97 31 - 124 2 23 Surrogate: 2-Fluorobiphenyl 86 90 32 - 115 Pyrene-d10 94 97 35 - 129 Terphenyl-d14 93 98 33 - 114 77 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PCBs EPA 8082A Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-5:6.5 Laboratory ID: 02-099-01 Aroclor 1016 ND 0.062 EPA 8082A 2-13-18 2-13-18 Aroclor 1221 ND 0.062 EPA 8082A 2-13-18 2-13-18 Aroclor 1232 ND 0.062 EPA 8082A 2-13-18 2-13-18 Aroclor 1242 ND 0.062 EPA 8082A 2-13-18 2-13-18 Aroclor 1248 ND 0.062 EPA 8082A 2-13-18 2-13-18 Aroclor 1254 ND 0.062 EPA 8082A 2-13-18 2-13-18 Aroclor 1260 ND 0.062 EPA 8082A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCB 79 40-134 Client ID: RTN001-5:10.5 Laboratory ID: 02-099-02 Aroclor 1016 ND 0.059 EPA 8082A 2-13-18 2-13-18 Aroclor 1221 ND 0.059 EPA 8082A 2-13-18 2-13-18 Aroclor 1232 ND 0.059 EPA 8082A 2-13-18 2-13-18 Aroclor 1242 ND 0.059 EPA 8082A 2-13-18 2-13-18 Aroclor 1248 ND 0.059 EPA 8082A 2-13-18 2-13-18 Aroclor 1254 ND 0.059 EPA 8082A 2-13-18 2-13-18 Aroclor 1260 ND 0.059 EPA 8082A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCB 70 40-134 Client ID: RTN001-6:12.0 Laboratory ID: 02-099-05 Aroclor 1016 ND 0.068 EPA 8082A 2-13-18 2-13-18 Aroclor 1221 ND 0.068 EPA 8082A 2-13-18 2-13-18 Aroclor 1232 ND 0.068 EPA 8082A 2-13-18 2-13-18 Aroclor 1242 ND 0.068 EPA 8082A 2-13-18 2-13-18 Aroclor 1248 ND 0.068 EPA 8082A 2-13-18 2-13-18 Aroclor 1254 ND 0.068 EPA 8082A 2-13-18 2-13-18 Aroclor 1260 ND 0.068 EPA 8082A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCB 61 40-134 78 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PCBs EPA 8082A Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-1:4.0 Laboratory ID: 02-099-12 Aroclor 1016 ND 0.055 EPA 8082A 2-13-18 2-13-18 Aroclor 1221 ND 0.055 EPA 8082A 2-13-18 2-13-18 Aroclor 1232 ND 0.055 EPA 8082A 2-13-18 2-13-18 Aroclor 1242 ND 0.055 EPA 8082A 2-13-18 2-13-18 Aroclor 1248 ND 0.055 EPA 8082A 2-13-18 2-13-18 Aroclor 1254 ND 0.055 EPA 8082A 2-13-18 2-13-18 Aroclor 1260 ND 0.055 EPA 8082A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCB 82 40-134 Client ID: RTN002-3:4.7 Laboratory ID: 02-099-21 Aroclor 1016 ND 0.064 EPA 8082A 2-13-18 2-13-18 Aroclor 1221 ND 0.064 EPA 8082A 2-13-18 2-13-18 Aroclor 1232 ND 0.064 EPA 8082A 2-13-18 2-13-18 Aroclor 1242 ND 0.064 EPA 8082A 2-13-18 2-13-18 Aroclor 1248 ND 0.064 EPA 8082A 2-13-18 2-13-18 Aroclor 1254 0.74 0.064 EPA 8082A 2-13-18 2-13-18 Aroclor 1260 0.24 0.064 EPA 8082A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCB 75 40-134 79 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 PCBs EPA 8082A QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0213S2 Aroclor 1016 ND 0.050 EPA 8082A 2-13-18 2-13-18 Aroclor 1221 ND 0.050 EPA 8082A 2-13-18 2-13-18 Aroclor 1232 ND 0.050 EPA 8082A 2-13-18 2-13-18 Aroclor 1242 ND 0.050 EPA 8082A 2-13-18 2-13-18 Aroclor 1248 ND 0.050 EPA 8082A 2-13-18 2-13-18 Aroclor 1254 ND 0.050 EPA 8082A 2-13-18 2-13-18 Aroclor 1260 ND 0.050 EPA 8082A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCB 86 40-134 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags MATRIX SPIKES Laboratory ID: 02-099-01 MS MSD MS MSD MS MSD Aroclor 1260 0.361 0.357 0.500 0.500 ND 72 71 34-126 1 16 Surrogate: DCB 77 74 40-134 80 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-02 Client ID: RTN001-5:10.5 Copper 14 1.2 6010D 2-9-18 2-9-18 Nickel 20 3.0 6010D 2-9-18 2-9-18 Zinc 40 3.0 6010D 2-9-18 2-9-18 Lab ID: 02-099-04 Client ID: RTN001-6:5.0 Arsenic ND 15 6010D 2-9-18 2-9-18 Barium 130 3.6 6010D 2-9-18 2-9-18 Cadmium ND 0.73 6010D 2-9-18 2-9-18 Chromium 52 1.5 6010D 2-9-18 2-9-18 Lead 17 7.3 6010D 2-9-18 2-9-18 Mercury ND 0.36 7471B 2-12-18 2-12-18 Selenium ND 15 6010D 2-9-18 2-9-18 Silver ND 1.5 6010D 2-9-18 2-9-18 81 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-05 Client ID: RTN001-6:12.0 Arsenic ND 14 6010D 2-9-18 2-9-18 Barium 75 3.4 6010D 2-9-18 2-9-18 Cadmium ND 0.68 6010D 2-9-18 2-9-18 Chromium 42 1.4 6010D 2-9-18 2-9-18 Lead ND 6.8 6010D 2-9-18 2-9-18 Mercury ND 0.34 7471B 2-12-18 2-12-18 Selenium ND 14 6010D 2-9-18 2-9-18 Silver ND 1.4 6010D 2-9-18 2-9-18 Lab ID: 02-099-07 Client ID: RTN001-7:7.0 Lead ND 6.2 6010D 2-9-18 2-9-18 82 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-08 Client ID: RTN001-7:11.0 Lead ND 6.4 6010D 2-9-18 2-9-18 Lab ID: 02-099-15 Client ID: RTN001-3:5.0 Arsenic ND 13 6010D 2-9-18 2-9-18 Barium 100 3.3 6010D 2-9-18 2-9-18 Cadmium ND 0.66 6010D 2-9-18 2-9-18 Chromium 47 1.3 6010D 2-9-18 2-9-18 Lead 8.6 6.6 6010D 2-9-18 2-9-18 Mercury ND 0.33 7471B 2-12-18 2-12-18 Selenium ND 13 6010D 2-9-18 2-9-18 Silver ND 1.3 6010D 2-9-18 2-9-18 83 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-16 Client ID: RTN001-3:8.0 Arsenic ND 14 6010D 2-9-18 2-9-18 Barium 85 3.4 6010D 2-9-18 2-9-18 Cadmium ND 0.68 6010D 2-9-18 2-9-18 Chromium 43 1.4 6010D 2-9-18 2-9-18 Lead ND 6.8 6010D 2-9-18 2-9-18 Mercury ND 0.34 7471B 2-12-18 2-12-18 Selenium ND 14 6010D 2-9-18 2-9-18 Silver ND 1.4 6010D 2-9-18 2-9-18 84 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 6010D METHOD BLANK QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0209SM1 Analyte Method Result PQL Arsenic 6010D ND 10 Barium 6010D ND 2.5 Cadmium 6010D ND 0.50 Chromium 6010D ND 1.0 Copper 6010D ND 1.0 Lead 6010D ND 5.0 Nickel 6010D ND 2.5 Selenium 6010D ND 10 Silver 6010D ND 1.0 Zinc 6010D ND 2.5 85 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B METHOD BLANK QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0212S1 Analyte Method Result PQL Mercury 7471B ND 0.25 86 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 6010D DUPLICATE QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-076-08 Sample Duplicate Analyte Result Result RPD PQL Flags Arsenic ND ND NA 10 Barium 57.6 55.3 4 2.5 Cadmium ND ND NA 0.50 Chromium 25.4 24.5 4 1.0 Copper 16.0 14.9 8 1.0 Lead ND ND NA 5.0 Nickel 19.2 19.6 2 2.5 Selenium ND ND NA 10 Silver ND ND NA 1.0 Zinc 34.7 35.0 1 2.5 87 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B DUPLICATE QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-099-04 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.25 88 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 6010D MS/MSD QUALITY CONTROL Date Extracted: 2-9-18 Date Analyzed: 2-9-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-076-08 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Arsenic 100 94.2 94 98.5 99 5 Barium 100 154 97 161 104 5 Cadmium 50.0 45.1 90 47.1 94 4 Chromium 100 116 90 121 95 4 Copper 50.0 62.7 93 65.7 99 5 Lead 250 223 89 235 94 5 Nickel 100 109 90 114 94 4 Selenium 100 90.1 90 94.8 95 5 Silver 25.0 20.3 81 21.3 85 5 Zinc 100 128 93 134 99 5 89 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B MS/MSD QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-099-04 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 0.500 0.487 97 0.493 99 1 90 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-06 Client ID: RTN001-6:GW Arsenic ND 3.3 200.8 2-12-18 2-12-18 Barium 38 28 200.8 2-12-18 2-12-18 Cadmium ND 4.4 200.8 2-12-18 2-12-18 Chromium ND 11 200.8 2-12-18 2-12-18 Lead ND 1.1 200.8 2-12-18 2-12-18 Mercury ND 0.50 7470A 2-12-18 2-12-18 Selenium ND 5.6 200.8 2-12-18 2-12-18 Silver ND 11 200.8 2-12-18 2-12-18 91 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-09 Client ID: RTN001-7:GW Antimony ND 5.6 200.8 2-12-18 2-12-18 Arsenic 13 3.3 200.8 2-12-18 2-12-18 Beryllium ND 11 200.8 2-12-18 2-12-18 Cadmium ND 4.4 200.8 2-12-18 2-12-18 Chromium 20 11 200.8 2-12-18 2-12-18 Copper 18 11 200.8 2-12-18 2-12-18 Lead 2.5 1.1 200.8 2-12-18 2-12-18 Mercury ND 0.50 7470A 2-12-18 2-12-18 Nickel ND 22 200.8 2-12-18 2-12-18 Selenium ND 5.6 200.8 2-12-18 2-12-18 Silver ND 11 200.8 2-12-18 2-12-18 Thallium ND 5.6 200.8 2-12-18 2-12-18 Zinc ND 28 200.8 2-12-18 2-12-18 92 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-17 Client ID: RTN001-3:GW Arsenic 15 3.3 200.8 2-12-18 2-12-18 Barium 42 28 200.8 2-12-18 2-12-18 Cadmium ND 4.4 200.8 2-12-18 2-12-18 Chromium ND 11 200.8 2-12-18 2-12-18 Lead ND 1.1 200.8 2-12-18 2-12-18 Mercury ND 0.50 7470A 2-12-18 2-12-18 Selenium ND 5.6 200.8 2-12-18 2-12-18 Silver ND 11 200.8 2-12-18 2-12-18 93 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 METHOD BLANK QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0212WM1 Analyte Method Result PQL Antimony 200.8 ND 5.6 Arsenic 200.8 ND 3.3 Barium 200.8 ND 28 Beryllium 200.8 ND 11 Cadmium 200.8 ND 4.4 Chromium 200.8 ND 11 Copper 200.8 ND 11 Lead 200.8 ND 1.1 Nickel 200.8 ND 22 Selenium 200.8 ND 5.6 Silver 200.8 ND 11 Thallium 200.8 ND 5.6 Zinc 200.8 ND 28 94 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A METHOD BLANK QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0212W1 Analyte Method Result PQL Mercury 7470A ND 0.50 95 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 DUPLICATE QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-011-01 Sample Duplicate Analyte Result Result RPD PQL Flags Antimony ND ND NA 5.6 Arsenic ND ND NA 3.3 Barium ND ND NA 28 Beryllium ND ND NA 11 Cadmium ND ND NA 4.4 Chromium ND ND NA 11 Copper ND ND NA 11 Lead ND ND NA 1.1 Nickel ND ND NA 22 Selenium ND ND NA 5.6 Silver ND ND NA 11 Thallium ND ND NA 5.6 Zinc ND ND NA 28 96 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A DUPLICATE QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.50 97 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 MS/MSD QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-011-01 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Antimony 222 231 104 233 105 1 Arsenic 222 226 102 223 100 1 Barium 222 226 102 221 100 2 Beryllium 222 227 102 217 98 5 Cadmium 222 222 100 222 100 0 Chromium 222 218 98 214 97 2 Copper 222 208 94 206 93 1 Lead 222 216 97 214 96 1 Nickel 222 210 95 207 93 1 Selenium 222 221 99 222 100 1 Silver 222 221 99 221 100 0 Thallium 222 218 98 214 96 2 Zinc 222 233 105 228 103 2 98 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A MS/MSD QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 12.5 11.0 88 10.8 86 2 99 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-06 Client ID: RTN001-6:GW Arsenic ND 3.0 200.8 2-9-18 2-12-18 Barium ND 25 200.8 2-9-18 2-12-18 Cadmium ND 4.0 200.8 2-9-18 2-12-18 Chromium ND 10 200.8 2-9-18 2-12-18 Lead ND 1.0 200.8 2-9-18 2-12-18 Mercury ND 0.50 7470A 2-9-18 2-12-18 Selenium ND 5.0 200.8 2-9-18 2-12-18 Silver ND 10 200.8 2-9-18 2-12-18 100 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-09 Client ID: RTN001-7:GW Antimony ND 5.0 200.8 2-9-18 2-12-18 Arsenic 6.4 3.0 200.8 2-9-18 2-12-18 Beryllium ND 10 200.8 2-9-18 2-12-18 Cadmium ND 4.0 200.8 2-9-18 2-12-18 Chromium ND 10 200.8 2-9-18 2-12-18 Copper ND 10 200.8 2-9-18 2-12-18 Lead ND 1.0 200.8 2-9-18 2-12-18 Mercury ND 0.50 7470A 2-9-18 2-12-18 Nickel ND 20 200.8 2-9-18 2-12-18 Selenium ND 5.0 200.8 2-9-18 2-12-18 Silver ND 10 200.8 2-9-18 2-12-18 Thallium ND 5.0 200.8 2-9-18 2-12-18 Zinc ND 25 200.8 2-9-18 2-12-18 101 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-099-17 Client ID: RTN001-3:GW Arsenic 13 3.0 200.8 2-9-18 2-12-18 Barium ND 25 200.8 2-9-18 2-12-18 Cadmium ND 4.0 200.8 2-9-18 2-12-18 Chromium ND 10 200.8 2-9-18 2-12-18 Lead ND 1.0 200.8 2-9-18 2-12-18 Mercury ND 0.50 7470A 2-9-18 2-12-18 Selenium ND 5.0 200.8 2-9-18 2-12-18 Silver ND 10 200.8 2-9-18 2-12-18 102 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 METHOD BLANK QUALITY CONTROL Date Filtered: 2-9-18 Date Analyzed: 2-12-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0209F1 Analyte Method Result PQL Antimony 200.8 ND 5.0 Arsenic 200.8 ND 3.0 Barium 200.8 ND 50 Beryllium 200.8 ND 10 Cadmium 200.8 ND 4.0 Chromium 200.8 ND 10 Copper 200.8 ND 10 Lead 200.8 ND 1.0 Nickel 200.8 ND 20 Selenium 200.8 ND 5.0 Silver 200.8 ND 10 Thallium 200.8 ND 5.0 Zinc 200.8 ND 25 103 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A METHOD BLANK QUALITY CONTROL Date Filtered: 2-9-18 Date Analyzed: 2-12-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0209F1 Analyte Method Result PQL Mercury 7470A ND 0.50 104 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 DUPLICATE QUALITY CONTROL Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-016-07 Sample Duplicate Analyte Result Result RPD PQL Flags Antimony ND ND NA 5.0 Arsenic ND ND NA 3.0 Barium ND ND NA 50 Beryllium ND ND NA 10 Cadmium ND ND NA 4.0 Chromium ND ND NA 10 Copper ND ND NA 10 Lead ND ND NA 1.0 Nickel ND ND NA 20 Selenium ND ND NA 5.0 Silver ND ND NA 10 Thallium ND ND NA 5.0 Zinc ND ND NA 25 105 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A DUPLICATE QUALITY CONTROL Date Filtered: 2-9-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.50 106 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 MS/MSD QUALITY CONTROL Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-016-07 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Antimony 200 206 103 208 104 1 Arsenic 200 217 109 215 108 1 Barium 200 209 104 210 105 0 Beryllium 200 208 104 214 107 3 Cadmium 200 209 105 210 105 0 Chromium 200 194 97 196 98 1 Copper 200 195 97 195 98 0 Lead 200 199 99 201 101 1 Nickel 200 189 94 194 97 3 Selenium 200 242 121 232 116 4 Silver 200 202 101 205 103 2 Thallium 200 200 100 203 102 2 Zinc 200 223 111 220 110 1 107 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A MS/MSD QUALITY CONTROL Date Filtered: 2-9-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 12.5 11.4 91 11.4 91 0 108 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 1,2-DIBROMOETHANE (EDB) EPA 8011 Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN001-6:GW Laboratory ID: 02-099-06 EDB ND 0.0097 EPA 8011 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits TCMX 82 25-143 Client ID: RTN001-3:GW Laboratory ID: 02-099-17 EDB ND 0.0096 EPA 8011 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits TCMX 97 25-143 109 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 1,2-DIBROMOETHANE (EDB) EPA 8011 QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0209W1 EDB ND 0.010 EPA 8011 2-9-18 2-9-18 Surrogate: Percent Recovery Control Limits TCMX 119 25-143 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0209W1 SB SBD SB SBD SB SBD EDB 0.109 0.108 0.100 0.100 N/A 109 108 72-135 1 10 DBCP 0.106 0.104 0.100 0.100 N/A 106 104 63-132 2 15 Surrogate: TCMX 110 115 25-143 110 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 14, 2018 Samples Submitted: February 9, 2018 Laboratory Reference: 1802-099 Project: 21-1-16700-301 % MOISTURE Date Analyzed: 2-9-18 Client ID Lab ID % Moisture RTN001-5:6.5 02-099-01 19 RTN001-5:10.5 02-099-02 15 RTN001-6:5.0 02-099-04 31 RTN001-6:12.0 02-099-05 27 RTN001-7:7.0 02-099-07 19 RTN001-7:11.0 02-099-08 21 RTN001-8:10.0 02-099-10 33 RTN002-1:4.0 02-099-12 9 RTN002-1:10.5 02-099-13 29 RTN001-3:5.0 02-099-15 25 RTN001-3:8.0 02-099-16 27 RTN002-3:4.7 02-099-21 21 RTN002-3:9.0 02-099-22 30 111 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 February 15, 2018 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 21-1-16700-301 Laboratory Reference No. 1802-116 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on February 10, 2018. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 Case Narrative Samples were collected on February 9, 2018 and received by the laboratory on February 10, 2018. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. Chlorinated Acid Herbicides EPA 8151A (soil) Analysis The RPD for 2,4-DB (21%) was above the quality control limit of 19% in the spike blank and spike blank duplicate. All other quality control values were within control limits, no further action was performed. Any other QA/QC issues associated with this extraction and analysis will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-HCID Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:5.0 Laboratory ID: 02-116-04 Gasoline Range Organics ND 22 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 54 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 110 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 Client ID: RTN002-4:6.2 Laboratory ID: 02-116-05 Gasoline Range Organics ND 27 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 69 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Detected 140 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 114 50-150 Client ID: RTN003-3:5.0 Laboratory ID: 02-116-13 Gasoline Range Organics ND 26 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 66 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 130 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 100 50-150 Client ID: RTN003-3:12.5 Laboratory ID: 02-116-14 Gasoline Range Organics ND 25 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 64 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 130 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 107 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-HCID QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212S3 Gasoline Range Organics ND 20 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 50 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 100 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-HCID Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:GW Laboratory ID: 02-116-06 Gasoline Range Organics ND 0.10 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 0.26 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 0.42 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 82 50-150 Client ID: RTN003-3:GW Laboratory ID: 02-116-15 Gasoline Range Organics ND 0.11 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 0.26 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 0.42 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 98 50-150 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-HCID QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212W1 Gasoline Range Organics ND 0.10 NWTPH-HCID 2-12-18 2-12-18 Diesel Range Organics ND 0.25 NWTPH-HCID 2-12-18 2-12-18 Lube Oil Range Organics ND 0.40 NWTPH-HCID 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 92 50-150 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:4.0 Laboratory ID: 02-116-01 Gasoline ND 4.2 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 95 66-130 Client ID: RTN002-2:7.5 Laboratory ID: 02-116-02 Gasoline ND 6.4 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 94 66-130 Client ID: RTN003-2:4.5 Laboratory ID: 02-116-07 Gasoline ND 5.5 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 96 66-130 Client ID: RTN003-2:8.0 Laboratory ID: 02-116-08 Gasoline ND 6.7 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 97 66-130 Client ID: RTN003-1:4.0 Laboratory ID: 02-116-10 Gasoline ND 5.1 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 93 66-130 Client ID: RTN003-1:9.0 Laboratory ID: 02-116-11 Gasoline ND 8.7 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 102 66-130 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:5.0 Laboratory ID: 02-116-16 Gasoline ND 5.4 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 100 66-130 Client ID: RTN004-1:8.0 Laboratory ID: 02-116-17 Gasoline ND 5.9 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 95 66-130 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212S1 Gasoline ND 5.0 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 81 66-130 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-116-01 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 95 90 66-130 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:GW Laboratory ID: 02-116-03 Gasoline ND 100 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 87 66-114 Client ID: RTN003-2:GW Laboratory ID: 02-116-09 Gasoline ND 100 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 78 66-114 Client ID: RTN003-1:GW Laboratory ID: 02-116-12 Gasoline ND 100 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 80 66-114 Client ID: RTN004-1:GW Laboratory ID: 02-116-18 Gasoline ND 100 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 78 66-114 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212W1 Gasoline ND 100 NWTPH-Gx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Fluorobenzene 80 66-114 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-116-03 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 87 91 66-114 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:4.0 Laboratory ID: 02-116-01 Diesel Range Organics ND 28 NWTPH-Dx 2-12-18 2-12-18 Lube Oil 70 56 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 88 50-150 Client ID: RTN002-2:7.5 Laboratory ID: 02-116-02 Diesel Range Organics ND 32 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 65 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 87 50-150 Client ID: RTN003-2:4.5 Laboratory ID: 02-116-07 Diesel Range Organics ND 32 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 64 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 77 50-150 Client ID: RTN003-2:8.0 Laboratory ID: 02-116-08 Diesel Range Organics ND 34 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 68 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 73 50-150 Client ID: RTN003-1:4.0 Laboratory ID: 02-116-10 Diesel Range Organics ND 28 NWTPH-Dx 2-12-18 2-12-18 Lube Oil 340 56 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 91 50-150 Client ID: RTN003-1:9.0 Laboratory ID: 02-116-11 Diesel Range Organics ND 38 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 76 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 78 50-150 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:5.0 Laboratory ID: 02-116-16 Diesel Range Organics 180 150 NWTPH-Dx 2-12-18 2-12-18 N Lube Oil 2000 290 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 95 50-150 Client ID: RTN004-1:8.0 Laboratory ID: 02-116-17 Diesel Range Organics ND 31 NWTPH-Dx 2-12-18 2-12-18 Lube Oil 62 62 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 64 50-150 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212S2 Diesel Range Organics ND 25 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 50 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-116-02 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 87 91 50-150 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:GW Laboratory ID: 02-116-03 Diesel Range Organics 0.41 0.26 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics 0.57 0.42 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 83 50-150 Client ID: RTN003-2:GW Laboratory ID: 02-116-09 Diesel Range Organics ND 0.26 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 0.42 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 95 50-150 Client ID: RTN003-1:GW Laboratory ID: 02-116-12 Diesel Range Organics ND 0.26 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 0.42 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 85 50-150 Client ID: RTN004-1:GW Laboratory ID: 02-116-18 Diesel Range Organics ND 0.27 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 0.43 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 89 50-150 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212W1 Diesel Range Organics ND 0.25 NWTPH-Dx 2-12-18 2-12-18 Lube Oil Range Organics ND 0.40 NWTPH-Dx 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 92 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-065-01 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 90 94 50-150 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:6.2 Laboratory ID: 02-116-05 Diesel Range Organics 72 34 NWTPH-Dx 2-13-18 2-13-18 Lube Oil Range Organics 220 69 NWTPH-Dx 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 81 50-150 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0213S2 Diesel Range Organics ND 25 NWTPH-Dx 2-13-18 2-13-18 Lube Oil Range Organics ND 50 NWTPH-Dx 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits o-Terphenyl 94 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 02-130-02 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA U1 Lube Oil 1730 1710 NA NA NA NA 1 NA Surrogate: o-Terphenyl 77 92 50-150 19 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:4.0 Laboratory ID: 02-116-01 Dichlorodifluoromethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 0.0035 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.00070 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 0.0035 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Acetone 0.099 0.0035 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 0.0035 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.0010 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 0.0035 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 0.0035 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.00070 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.00070 EPA 8260C 2-13-18 2-13-18 2-Butanone 0.014 0.0035 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 0.0035 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 0.0035 EPA 8260C 2-13-18 2-13-18 Toluene ND 0.0035 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.00070 EPA 8260C 2-13-18 2-13-18 20 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:4.0 Laboratory ID: 02-116-01 1,1,2-Trichloroethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.00070 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 0.0035 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 m,p-Xylene ND 0.0014 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Bromoform ND 0.0035 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.00070 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.00070 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 0.0035 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.0035 EPA 8260C 2-13-18 2-13-18 Naphthalene 0.0043 0.00070 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.00070 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 130 75-131 Toluene-d8 123 83-130 4-Bromofluorobenzene 116 78-130 21 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:7.5 Laboratory ID: 02-116-02 Dichlorodifluoromethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0060 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.0012 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0060 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Acetone 0.058 0.0060 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0060 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.0012 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0060 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0060 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.0012 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.0012 EPA 8260C 2-12-18 2-12-18 2-Butanone 0.0094 0.0060 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0060 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0060 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0060 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.0012 EPA 8260C 2-12-18 2-12-18 22 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:7.5 Laboratory ID: 02-116-02 1,1,2-Trichloroethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.0012 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0060 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0024 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0060 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.0012 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.0012 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0060 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0060 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.0012 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.0012 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 108 75-131 Toluene-d8 112 83-130 4-Bromofluorobenzene 109 78-130 23 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:5.0 Laboratory ID: 02-116-04 Dichlorodifluoromethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0038 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.00077 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0038 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Acetone 0.023 0.0038 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0038 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.00077 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0038 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0038 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.00077 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.00077 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 0.0038 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0038 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0038 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0038 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.00077 EPA 8260C 2-12-18 2-12-18 24 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:5.0 Laboratory ID: 02-116-04 1,1,2-Trichloroethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.00077 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0038 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0015 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0038 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.00077 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.00077 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0038 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0038 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.00077 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.00077 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 110 75-131 Toluene-d8 113 83-130 4-Bromofluorobenzene 113 78-130 25 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:6.2 Laboratory ID: 02-116-05 Dichlorodifluoromethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 0.0060 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.0012 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 0.0060 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.0012 EPA 8260C 2-13-18 2-13-18 Acetone 0.30 0.0060 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 0.0060 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide 0.0024 0.0018 EPA 8260C 2-13-18 2-13-18 Y Methylene Chloride ND 0.0060 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.0012 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 0.0060 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.0012 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.0012 EPA 8260C 2-13-18 2-13-18 2-Butanone 0.052 0.0060 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.0012 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 0.0060 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.0012 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 0.0060 EPA 8260C 2-13-18 2-13-18 Toluene ND 0.0060 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.0012 EPA 8260C 2-13-18 2-13-18 26 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:6.2 Laboratory ID: 02-116-05 1,1,2-Trichloroethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.0012 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 0.0060 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.0012 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.0012 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.0012 EPA 8260C 2-13-18 2-13-18 m,p-Xylene ND 0.0024 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.0012 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.0012 EPA 8260C 2-13-18 2-13-18 Bromoform ND 0.0060 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.0012 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.084 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.084 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.084 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.084 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.084 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 0.42 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.42 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 0.084 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.084 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 129 75-131 Toluene-d8 120 83-130 4-Bromofluorobenzene 96 78-130 27 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-2:4.5 Laboratory ID: 02-116-07 Dichlorodifluoromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0048 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.00096 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0048 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Acetone ND 0.0048 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0048 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.00096 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0048 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0048 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.00096 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 0.0048 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0048 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0048 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0048 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.00096 EPA 8260C 2-12-18 2-12-18 28 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-2:4.5 Laboratory ID: 02-116-07 1,1,2-Trichloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.00096 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0048 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0019 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0048 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.00096 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.00096 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0048 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0048 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 115 75-131 Toluene-d8 119 83-130 4-Bromofluorobenzene 114 78-130 29 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-2:8.0 Laboratory ID: 02-116-08 Dichlorodifluoromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0054 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.0011 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0054 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Acetone 0.11 0.0054 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0054 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.0011 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0054 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0054 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.0011 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 2-Butanone 0.020 0.0054 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0054 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0054 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0054 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 2-12-18 2-12-18 30 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-2:8.0 Laboratory ID: 02-116-08 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.0011 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0054 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0021 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0054 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.0011 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0054 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0054 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.0011 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 113 75-131 Toluene-d8 115 83-130 4-Bromofluorobenzene 108 78-130 31 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-1:4.0 Laboratory ID: 02-116-10 Dichlorodifluoromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0047 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.00095 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0047 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Acetone ND 0.0047 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0047 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.00095 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0047 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0047 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.00095 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 0.0047 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0047 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0047 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0047 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.00095 EPA 8260C 2-12-18 2-12-18 32 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-1:4.0 Laboratory ID: 02-116-10 1,1,2-Trichloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.00095 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0047 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0019 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0047 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.00095 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.00095 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0047 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0047 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 75-131 Toluene-d8 101 83-130 4-Bromofluorobenzene 100 78-130 33 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-1:9.0 Laboratory ID: 02-116-11 Dichlorodifluoromethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0063 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.0013 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0063 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Acetone 0.043 0.0063 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0063 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.0013 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0063 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0063 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.0013 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.0013 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 0.0063 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0063 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0063 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0063 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.0013 EPA 8260C 2-12-18 2-12-18 34 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-1:9.0 Laboratory ID: 02-116-11 1,1,2-Trichloroethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.0013 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0063 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0025 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0063 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.0013 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.0013 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0063 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0063 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.0013 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.0013 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 75-131 Toluene-d8 101 83-130 4-Bromofluorobenzene 98 78-130 35 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-3:5.0 Laboratory ID: 02-116-13 Dichlorodifluoromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0048 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.00096 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0048 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Acetone 0.099 0.0048 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0048 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.00096 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0048 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0048 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.00096 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 2-Butanone 0.016 0.0048 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0048 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0048 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0048 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.00096 EPA 8260C 2-12-18 2-12-18 36 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-3:5.0 Laboratory ID: 02-116-13 1,1,2-Trichloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.00096 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0048 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0019 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0048 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.00096 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.00096 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0048 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0048 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.00096 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.00096 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 102 75-131 Toluene-d8 103 83-130 4-Bromofluorobenzene 101 78-130 37 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-3:12.5 Laboratory ID: 02-116-14 Dichlorodifluoromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0047 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.00095 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0047 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Acetone 0.051 0.0047 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0047 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.00095 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0047 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0047 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.00095 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 2-Butanone 0.0083 0.0047 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0047 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0047 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0047 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.00095 EPA 8260C 2-12-18 2-12-18 38 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-3:12.5 Laboratory ID: 02-116-14 1,1,2-Trichloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.00095 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0047 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0019 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0047 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.00095 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.00095 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0047 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0047 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.00095 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.00095 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 118 75-131 Toluene-d8 118 83-130 4-Bromofluorobenzene 113 78-130 39 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:5.0 Laboratory ID: 02-116-16 Dichlorodifluoromethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0040 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.00079 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0040 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Acetone 0.10 0.0040 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0040 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide 0.0022 0.00079 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0040 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0040 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.00079 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.00079 EPA 8260C 2-12-18 2-12-18 2-Butanone 0.019 0.0040 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0040 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0040 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0040 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.00079 EPA 8260C 2-12-18 2-12-18 40 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:5.0 Laboratory ID: 02-116-16 1,1,2-Trichloroethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.00079 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0040 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0016 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0040 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.00079 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.00079 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene 0.0014 0.00079 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0040 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0040 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.00079 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.00079 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 120 75-131 Toluene-d8 117 83-130 4-Bromofluorobenzene 108 78-130 41 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:8.0 Laboratory ID: 02-116-17 Dichlorodifluoromethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 0.0045 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.00090 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 0.0045 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.00090 EPA 8260C 2-13-18 2-13-18 Acetone 0.14 0.0045 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 0.0045 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.0014 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 0.0045 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.00090 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 0.0045 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.00090 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.00090 EPA 8260C 2-13-18 2-13-18 2-Butanone 0.026 0.0045 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.00090 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 0.0045 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.00090 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 0.0045 EPA 8260C 2-13-18 2-13-18 Toluene ND 0.0045 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.00090 EPA 8260C 2-13-18 2-13-18 42 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:8.0 Laboratory ID: 02-116-17 1,1,2-Trichloroethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.00090 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 0.0045 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.00090 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.00090 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.00090 EPA 8260C 2-13-18 2-13-18 m,p-Xylene ND 0.0018 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.00090 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.00090 EPA 8260C 2-13-18 2-13-18 Bromoform ND 0.0045 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.00090 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.077 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.077 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.077 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.077 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.077 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 0.39 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.39 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 0.077 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.077 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 96 75-131 Toluene-d8 111 83-130 4-Bromofluorobenzene 84 78-130 43 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0212S1 Dichlorodifluoromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloromethane ND 0.0050 EPA 8260C 2-12-18 2-12-18 Vinyl Chloride ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromomethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloroethane ND 0.0050 EPA 8260C 2-12-18 2-12-18 Trichlorofluoromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Acetone ND 0.0050 EPA 8260C 2-12-18 2-12-18 Iodomethane ND 0.0050 EPA 8260C 2-12-18 2-12-18 Carbon Disulfide ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methylene Chloride ND 0.0050 EPA 8260C 2-12-18 2-12-18 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Vinyl Acetate ND 0.0050 EPA 8260C 2-12-18 2-12-18 2,2-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Butanone ND 0.0050 EPA 8260C 2-12-18 2-12-18 Bromochloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chloroform ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Carbon Tetrachloride ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Benzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Trichloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Dibromomethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromodichloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260C 2-12-18 2-12-18 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Methyl Isobutyl Ketone ND 0.0050 EPA 8260C 2-12-18 2-12-18 Toluene ND 0.0050 EPA 8260C 2-12-18 2-12-18 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-12-18 2-12-18 44 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0212S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Tetrachloroethene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3-Dichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Hexanone ND 0.0050 EPA 8260C 2-12-18 2-12-18 Dibromochloromethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dibromoethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Chlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 Ethylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 m,p-Xylene ND 0.0020 EPA 8260C 2-12-18 2-12-18 o-Xylene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Styrene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromoform ND 0.0050 EPA 8260C 2-12-18 2-12-18 Isopropylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Bromobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 2-12-18 2-12-18 n-Propylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 2-Chlorotoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 4-Chlorotoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 tert-Butylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 sec-Butylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 p-Isopropyltoluene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 n-Butylbenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260C 2-12-18 2-12-18 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Hexachlorobutadiene ND 0.0050 EPA 8260C 2-12-18 2-12-18 Naphthalene ND 0.0010 EPA 8260C 2-12-18 2-12-18 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 75-131 Toluene-d8 99 83-130 4-Bromofluorobenzene 100 78-130 45 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0213S1 Dichlorodifluoromethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 0.0050 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.0010 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 0.0050 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Acetone ND 0.0050 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 0.0050 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.0015 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 0.0050 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 0.0050 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.0010 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 0.0050 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 0.0050 EPA 8260C 2-13-18 2-13-18 Toluene ND 0.0050 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 2-13-18 2-13-18 46 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0213S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.0010 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 0.0050 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 m,p-Xylene ND 0.0020 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Bromoform ND 0.0050 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.0010 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.0050 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 0.0010 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 110 75-131 Toluene-d8 110 83-130 4-Bromofluorobenzene 108 78-130 47 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0212S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0426 0.0412 0.0500 0.0500 85 82 58-126 3 20 Benzene 0.0523 0.0505 0.0500 0.0500 105 101 72-122 4 19 Trichloroethene 0.0463 0.0438 0.0500 0.0500 93 88 75-120 6 20 Toluene 0.0505 0.0482 0.0500 0.0500 101 96 78-123 5 19 Chlorobenzene 0.0466 0.0449 0.0500 0.0500 93 90 75-120 4 18 Surrogate: Dibromofluoromethane 101 99 75-131 Toluene-d8 102 98 83-130 4-Bromofluorobenzene 100 97 78-130 48 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0213S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0511 0.0561 0.0500 0.0500 102 112 58-126 9 20 Benzene 0.0547 0.0595 0.0500 0.0500 109 119 72-122 8 19 Trichloroethene 0.0480 0.0536 0.0500 0.0500 96 107 75-120 11 20 Toluene 0.0507 0.0566 0.0500 0.0500 101 113 78-123 11 19 Chlorobenzene 0.0470 0.0517 0.0500 0.0500 94 103 75-120 10 18 Surrogate: Dibromofluoromethane 102 100 75-131 Toluene-d8 100 99 83-130 4-Bromofluorobenzene 97 98 78-130 49 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:GW Laboratory ID: 02-116-03 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 50 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:GW Laboratory ID: 02-116-03 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 2.0 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 m,p-Xylene 0.64 0.40 EPA 8260C 2-13-18 2-13-18 o-Xylene 0.25 0.20 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromoform ND 1.0 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.26 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.25 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene 0.29 0.20 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 100 75-127 Toluene-d8 108 80-127 4-Bromofluorobenzene 102 78-125 51 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:GW Laboratory ID: 02-116-06 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 52 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:GW Laboratory ID: 02-116-06 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 2.0 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 m,p-Xylene 0.49 0.40 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.20 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromoform ND 1.0 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.26 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.25 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 100 75-127 Toluene-d8 106 80-127 4-Bromofluorobenzene 103 78-125 53 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-2:GW Laboratory ID: 02-116-09 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 54 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-2:GW Laboratory ID: 02-116-09 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 2.0 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 m,p-Xylene 0.59 0.40 EPA 8260C 2-13-18 2-13-18 o-Xylene 0.22 0.20 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromoform ND 1.0 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.26 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.25 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene 0.30 0.20 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 91 75-127 Toluene-d8 97 80-127 4-Bromofluorobenzene 94 78-125 55 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-1:GW Laboratory ID: 02-116-12 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 56 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-1:GW Laboratory ID: 02-116-12 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 2.0 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 m,p-Xylene ND 0.40 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.20 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromoform ND 1.0 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.26 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.25 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 97 75-127 Toluene-d8 103 80-127 4-Bromofluorobenzene 97 78-125 57 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-3:GW Laboratory ID: 02-116-15 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 58 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-3:GW Laboratory ID: 02-116-15 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 2.0 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 m,p-Xylene ND 0.40 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.20 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromoform ND 1.0 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.26 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.25 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene 0.21 0.20 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 75-127 Toluene-d8 101 80-127 4-Bromofluorobenzene 96 78-125 59 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:GW Laboratory ID: 02-116-18 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide 0.26 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 60 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:GW Laboratory ID: 02-116-18 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 2.0 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 m,p-Xylene ND 0.40 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.20 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromoform ND 1.0 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.26 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.25 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 97 75-127 Toluene-d8 101 80-127 4-Bromofluorobenzene 98 78-125 61 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: Trip Blank Laboratory ID: 02-116-19 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 62 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C Page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: Trip Blank Laboratory ID: 02-116-19 1,1,2-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Tetrachloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Hexanone ND 2.0 EPA 8260C 2-13-18 2-13-18 Dibromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromoethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Ethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 m,p-Xylene ND 0.40 EPA 8260C 2-13-18 2-13-18 o-Xylene ND 0.20 EPA 8260C 2-13-18 2-13-18 Styrene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromoform ND 1.0 EPA 8260C 2-13-18 2-13-18 Isopropylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromobenzene ND 0.26 EPA 8260C 2-13-18 2-13-18 1,1,2,2-Tetrachloroethane ND 0.25 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Propylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 4-Chlorotoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3,5-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 tert-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2,4-Trimethylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 sec-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,3-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 p-Isopropyltoluene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,4-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 n-Butylbenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,4-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Hexachlorobutadiene ND 0.20 EPA 8260C 2-13-18 2-13-18 Naphthalene ND 1.0 EPA 8260C 2-13-18 2-13-18 1,2,3-Trichlorobenzene ND 0.20 EPA 8260C 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 99 75-127 Toluene-d8 104 80-127 4-Bromofluorobenzene 100 78-125 63 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0213W2 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 64 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C METHOD BLANK QUALITY CONTROL Page 2 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0213W2 Dichlorodifluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloromethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Vinyl Chloride ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Trichlorofluoromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Acetone ND 5.0 EPA 8260C 2-13-18 2-13-18 Iodomethane ND 1.0 EPA 8260C 2-13-18 2-13-18 Carbon Disulfide ND 0.20 EPA 8260C 2-13-18 2-13-18 Methylene Chloride ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl t-Butyl Ether ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Vinyl Acetate ND 1.0 EPA 8260C 2-13-18 2-13-18 2,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Butanone ND 5.0 EPA 8260C 2-13-18 2-13-18 Bromochloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Chloroform ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1,1-Trichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Carbon Tetrachloride ND 0.20 EPA 8260C 2-13-18 2-13-18 1,1-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Benzene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloroethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Trichloroethene ND 0.20 EPA 8260C 2-13-18 2-13-18 1,2-Dichloropropane ND 0.20 EPA 8260C 2-13-18 2-13-18 Dibromomethane ND 0.20 EPA 8260C 2-13-18 2-13-18 Bromodichloromethane ND 0.20 EPA 8260C 2-13-18 2-13-18 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260C 2-13-18 2-13-18 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 Methyl Isobutyl Ketone ND 2.0 EPA 8260C 2-13-18 2-13-18 Toluene ND 1.0 EPA 8260C 2-13-18 2-13-18 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260C 2-13-18 2-13-18 65 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 VOLATILES EPA 8260C SB/SBD QUALITY CONTROL Matrix: Water Units: ug/L Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0213W1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 9.79 10.0 10.0 10.0 98 100 63-126 2 21 Benzene 10.3 10.7 10.0 10.0 103 107 78-122 4 19 Trichloroethene 10.3 10.5 10.0 10.0 103 105 63-120 2 20 Toluene 10.5 10.7 10.0 10.0 105 107 79-124 2 19 Chlorobenzene 10.4 10.6 10.0 10.0 104 106 78-120 2 19 Surrogate: Dibromofluoromethane 95 98 75-127 Toluene-d8 97 98 80-127 4-Bromofluorobenzene 97 99 78-125 66 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:4.0 Laboratory ID: 02-116-01 Naphthalene 0.11 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 2-Methylnaphthalene 0.060 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 1-Methylnaphthalene 0.066 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Acenaphthylene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Acenaphthene 0.049 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Fluorene 0.0086 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Phenanthrene 0.022 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Anthracene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Fluoranthene 0.019 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Pyrene 0.016 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[a]anthracene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Chrysene 0.0076 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[b]fluoranthene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Benzo(j,k)fluoranthene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[a]pyrene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Indeno(1,2,3-c,d)pyrene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Dibenz[a,h]anthracene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[g,h,i]perylene ND 0.0075 EPA 8270D/SIM 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 75 32 - 115 Pyrene-d10 75 35 - 129 Terphenyl-d14 94 33 - 114 67 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-4:6.2 Laboratory ID: 02-116-05 Naphthalene 0.083 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 2-Methylnaphthalene 0.033 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 1-Methylnaphthalene 0.020 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Acenaphthylene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Acenaphthene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Fluorene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Phenanthrene 0.030 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Anthracene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Fluoranthene 0.014 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Pyrene 0.012 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Benzo[a]anthracene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Chrysene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Benzo[b]fluoranthene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Benzo(j,k)fluoranthene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Benzo[a]pyrene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Indeno(1,2,3-c,d)pyrene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Dibenz[a,h]anthracene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Benzo[g,h,i]perylene ND 0.0091 EPA 8270D/SIM 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 67 32 - 115 Pyrene-d10 67 35 - 129 Terphenyl-d14 101 33 - 114 68 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-1:4.0 Laboratory ID: 02-116-10 Naphthalene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 2-Methylnaphthalene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 1-Methylnaphthalene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Acenaphthylene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Acenaphthene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Fluorene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Phenanthrene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Anthracene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Fluoranthene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Pyrene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[a]anthracene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Chrysene 0.021 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[b]fluoranthene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Benzo(j,k)fluoranthene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[a]pyrene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Indeno(1,2,3-c,d)pyrene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Dibenz[a,h]anthracene ND 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[g,h,i]perylene 0.011 0.0074 EPA 8270D/SIM 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 78 32 - 115 Pyrene-d10 72 35 - 129 Terphenyl-d14 102 33 - 114 69 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:5.0 Laboratory ID: 02-116-16 Naphthalene 0.0087 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 2-Methylnaphthalene 0.023 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 1-Methylnaphthalene 0.018 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Acenaphthylene ND 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Acenaphthene ND 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Fluorene 0.0090 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Phenanthrene 0.053 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Anthracene ND 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Fluoranthene 0.061 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Pyrene 0.055 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[a]anthracene 0.038 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Chrysene 0.060 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[b]fluoranthene 0.040 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Benzo(j,k)fluoranthene 0.0099 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[a]pyrene 0.026 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Indeno(1,2,3-c,d)pyrene 0.021 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Dibenz[a,h]anthracene 0.0080 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[g,h,i]perylene 0.034 0.0078 EPA 8270D/SIM 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 72 32 - 115 Pyrene-d10 64 35 - 129 Terphenyl-d14 107 33 - 114 70 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:8.0 Laboratory ID: 02-116-17 Naphthalene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 2-Methylnaphthalene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 1-Methylnaphthalene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Acenaphthylene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Acenaphthene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Fluorene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Phenanthrene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Anthracene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Fluoranthene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Pyrene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Benzo[a]anthracene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Chrysene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Benzo[b]fluoranthene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Benzo(j,k)fluoranthene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Benzo[a]pyrene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Indeno(1,2,3-c,d)pyrene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Dibenz[a,h]anthracene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Benzo[g,h,i]perylene ND 0.0083 EPA 8270D/SIM 2-14-18 2-15-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 57 32 - 115 Pyrene-d10 51 35 - 129 Terphenyl-d14 58 33 - 114 71 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM METHOD BLANK QUALITY CONTROL Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0213S1 Naphthalene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 2-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 1-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Acenaphthylene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Acenaphthene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Fluorene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Phenanthrene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Anthracene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Fluoranthene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Pyrene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Benzo[a]anthracene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Chrysene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Benzo[b]fluoranthene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Benzo(j,k)fluoranthene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Benzo[a]pyrene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Indeno(1,2,3-c,d)pyrene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Dibenz[a,h]anthracene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Benzo[g,h,i]perylene ND 0.0067 EPA 8270D/SIM 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 87 32 - 115 Pyrene-d10 97 35 - 129 Terphenyl-d14 105 33 - 114 72 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM METHOD BLANK QUALITY CONTROL Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0214S3 Naphthalene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 2-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 1-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Acenaphthylene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Acenaphthene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Fluorene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Phenanthrene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Anthracene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Fluoranthene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Pyrene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[a]anthracene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Chrysene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[b]fluoranthene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Benzo(j,k)fluoranthene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[a]pyrene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Indeno(1,2,3-c,d)pyrene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Dibenz[a,h]anthracene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Benzo[g,h,i]perylene ND 0.0067 EPA 8270D/SIM 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 87 32 - 115 Pyrene-d10 95 35 - 129 Terphenyl-d14 96 33 - 114 73 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM MS/MSD QUALITY CONTROL Matrix: Soil Units: mg/Kg Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags MATRIX SPIKES Laboratory ID: 02-083-01 MS MSD MS MSD MS MSD Naphthalene 0.0678 0.0660 0.0833 0.0833 ND 81 79 29 - 116 3 31 Acenaphthylene 0.0748 0.0749 0.0833 0.0833 ND 90 90 38 - 122 0 23 Acenaphthene 0.0769 0.0748 0.0833 0.0833 ND 92 90 34 - 117 3 24 Fluorene 0.0791 0.0752 0.0833 0.0833 ND 95 90 40 - 124 5 22 Phenanthrene 0.0774 0.0767 0.0833 0.0833 ND 93 92 27 - 123 1 24 Anthracene 0.0791 0.0794 0.0833 0.0833 ND 95 95 47 - 148 0 21 Fluoranthene 0.0813 0.0820 0.0833 0.0833 ND 98 98 22 - 133 1 23 Pyrene 0.0805 0.0821 0.0833 0.0833 ND 97 99 23 - 133 2 24 Benzo[a]anthracene 0.0885 0.0893 0.0833 0.0833 ND 106 107 27 - 143 1 23 Chrysene 0.0829 0.0830 0.0833 0.0833 ND 100 100 22 - 130 0 24 Benzo[b]fluoranthene 0.0861 0.0825 0.0833 0.0833 ND 103 99 15 - 141 4 26 Benzo(j,k)fluoranthene 0.0808 0.0852 0.0833 0.0833 ND 97 102 42 - 112 5 24 Benzo[a]pyrene 0.0832 0.0835 0.0833 0.0833 ND 100 100 33 - 126 0 26 Indeno(1,2,3-c,d)pyrene 0.0809 0.0819 0.0833 0.0833 ND 97 98 30 - 125 1 25 Dibenz[a,h]anthracene 0.0822 0.0831 0.0833 0.0833 ND 99 100 31 - 124 1 22 Benzo[g,h,i]perylene 0.0773 0.0786 0.0833 0.0833 ND 93 94 31 - 124 2 23 Surrogate: 2-Fluorobiphenyl 83 83 32 - 115 Pyrene-d10 94 93 35 - 129 Terphenyl-d14 93 94 33 - 114 74 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PAHs EPA 8270D/SIM MS/MSD QUALITY CONTROL Matrix: Soil Units: mg/Kg Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags MATRIX SPIKES Laboratory ID: 02-116-01 MS MSD MS MSD MS MSD Naphthalene 0.167 0.163 0.0833 0.0833 0.0997 81 76 29 - 116 2 31 Acenaphthylene 0.0704 0.0638 0.0833 0.0833 ND 85 77 38 - 122 10 23 Acenaphthene 0.126 0.124 0.0833 0.0833 0.0433 99 97 34 - 117 2 24 Fluorene 0.0874 0.0873 0.0833 0.0833 0.00771 96 96 40 - 124 0 22 Phenanthrene 0.0910 0.0899 0.0833 0.0833 0.0195 86 85 27 - 123 1 24 Anthracene 0.0740 0.0708 0.0833 0.0833 ND 89 85 47 - 148 4 21 Fluoranthene 0.0901 0.0888 0.0833 0.0833 0.0173 87 86 22 - 133 1 23 Pyrene 0.0830 0.0817 0.0833 0.0833 0.0141 83 81 23 - 133 2 24 Benzo[a]anthracene 0.0881 0.0841 0.0833 0.0833 ND 106 101 27 - 143 5 23 Chrysene 0.0813 0.0789 0.0833 0.0833 0.00676 89 87 22 - 130 3 24 Benzo[b]fluoranthene 0.0844 0.0810 0.0833 0.0833 ND 101 97 15 - 141 4 26 Benzo(j,k)fluoranthene 0.0742 0.0717 0.0833 0.0833 ND 89 86 42 - 112 3 24 Benzo[a]pyrene 0.0753 0.0705 0.0833 0.0833 ND 90 85 33 - 126 7 26 Indeno(1,2,3-c,d)pyrene 0.0741 0.0708 0.0833 0.0833 ND 89 85 30 - 125 5 25 Dibenz[a,h]anthracene 0.0741 0.0701 0.0833 0.0833 ND 89 84 31 - 124 6 22 Benzo[g,h,i]perylene 0.0735 0.0693 0.0833 0.0833 ND 88 83 31 - 124 6 23 Surrogate: 2-Fluorobiphenyl 78 72 32 - 115 Pyrene-d10 79 74 35 - 129 Terphenyl-d14 104 100 33 - 114 75 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PCBs EPA 8082A Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN002-2:4.0 Laboratory ID: 02-116-01 Aroclor 1016 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1221 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1232 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1242 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1248 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1254 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1260 ND 0.056 EPA 8082A 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits DCB 85 40-134 Client ID: RTN002-4:6.2 Laboratory ID: 02-116-05 Aroclor 1016 ND 0.068 EPA 8082A 2-14-18 2-14-18 Aroclor 1221 ND 0.068 EPA 8082A 2-14-18 2-14-18 Aroclor 1232 ND 0.068 EPA 8082A 2-14-18 2-14-18 Aroclor 1242 ND 0.068 EPA 8082A 2-14-18 2-14-18 Aroclor 1248 ND 0.068 EPA 8082A 2-14-18 2-14-18 Aroclor 1254 0.57 0.068 EPA 8082A 2-14-18 2-14-18 Aroclor 1260 0.11 0.068 EPA 8082A 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits DCB 86 40-134 Client ID: RTN003-1:4.0 Laboratory ID: 02-116-10 Aroclor 1016 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1221 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1232 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1242 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1248 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1254 ND 0.056 EPA 8082A 2-14-18 2-14-18 Aroclor 1260 ND 0.056 EPA 8082A 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits DCB 79 40-134 76 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PCBs EPA 8082A Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:5.0 Laboratory ID: 02-116-16 Aroclor 1016 ND 0.059 EPA 8082A 2-14-18 2-14-18 Aroclor 1221 ND 0.059 EPA 8082A 2-14-18 2-14-18 Aroclor 1232 ND 0.059 EPA 8082A 2-14-18 2-14-18 Aroclor 1242 ND 0.059 EPA 8082A 2-14-18 2-14-18 Aroclor 1248 ND 0.059 EPA 8082A 2-14-18 2-14-18 Aroclor 1254 ND 0.059 EPA 8082A 2-14-18 2-14-18 Aroclor 1260 ND 0.059 EPA 8082A 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits DCB 66 40-134 Client ID: RTN004-1:8.0 Laboratory ID: 02-116-17 Aroclor 1016 ND 0.062 EPA 8082A 2-14-18 2-14-18 Aroclor 1221 ND 0.062 EPA 8082A 2-14-18 2-14-18 Aroclor 1232 ND 0.062 EPA 8082A 2-14-18 2-14-18 Aroclor 1242 ND 0.062 EPA 8082A 2-14-18 2-14-18 Aroclor 1248 ND 0.062 EPA 8082A 2-14-18 2-14-18 Aroclor 1254 ND 0.062 EPA 8082A 2-14-18 2-14-18 Aroclor 1260 ND 0.062 EPA 8082A 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits DCB 72 40-134 77 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 PCBs EPA 8082A QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0214S1 Aroclor 1016 ND 0.050 EPA 8082A 2-14-18 2-14-18 Aroclor 1221 ND 0.050 EPA 8082A 2-14-18 2-14-18 Aroclor 1232 ND 0.050 EPA 8082A 2-14-18 2-14-18 Aroclor 1242 ND 0.050 EPA 8082A 2-14-18 2-14-18 Aroclor 1248 ND 0.050 EPA 8082A 2-14-18 2-14-18 Aroclor 1254 ND 0.050 EPA 8082A 2-14-18 2-14-18 Aroclor 1260 ND 0.050 EPA 8082A 2-14-18 2-14-18 Surrogate: Percent Recovery Control Limits DCB 96 40-134 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0214S1 SB SBD SB SBD SB SBD Aroclor 1260 0.509 0.452 0.500 0.500 N/A 102 90 56-130 12 15 Surrogate: DCB 96 88 40-134 78 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-116-07 Client ID: RTN003-2:4.5 Arsenic ND 13 6010D 2-12-18 2-12-18 Cadmium ND 0.63 6010D 2-12-18 2-12-18 Chromium 37 0.63 6010D 2-12-18 2-12-18 Lead ND 6.3 6010D 2-12-18 2-12-18 Mercury ND 0.32 7471B 2-12-18 2-12-18 Lab ID: 02-116-08 Client ID: RTN003-2:8.0 Arsenic ND 14 6010D 2-12-18 2-12-18 Cadmium ND 0.68 6010D 2-12-18 2-12-18 Chromium 42 0.68 6010D 2-12-18 2-12-18 Lead ND 6.8 6010D 2-12-18 2-12-18 Mercury ND 0.34 7471B 2-12-18 2-12-18 79 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-116-10 Client ID: RTN003-1:4.0 Arsenic ND 11 6010D 2-12-18 2-12-18 Barium 62 2.8 6010D 2-12-18 2-12-18 Cadmium ND 0.56 6010D 2-12-18 2-12-18 Chromium 44 0.56 6010D 2-12-18 2-12-18 Lead ND 5.6 6010D 2-12-18 2-12-18 Mercury ND 0.28 7471B 2-12-18 2-12-18 Selenium ND 11 6010D 2-12-18 2-12-18 Silver ND 1.1 6010D 2-12-18 2-12-18 Lab ID: 02-116-11 Client ID: RTN003-1:9.0 Arsenic ND 15 6010D 2-12-18 2-12-18 Barium 110 3.8 6010D 2-12-18 2-12-18 Cadmium ND 0.76 6010D 2-12-18 2-12-18 Chromium 51 0.76 6010D 2-12-18 2-12-18 Lead ND 7.6 6010D 2-12-18 2-12-18 Mercury ND 0.38 7471B 2-12-18 2-12-18 Selenium ND 15 6010D 2-12-18 2-12-18 Silver ND 1.5 6010D 2-12-18 2-12-18 80 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D/7471B .Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-116-16 Client ID: RTN004-1:5.0 Arsenic ND 12 6010D 2-12-18 2-12-18 Cadmium ND 0.59 6010D 2-12-18 2-12-18 Chromium 42 0.59 6010D 2-12-18 2-12-18 Lead 23 5.9 6010D 2-12-18 2-12-18 Mercury ND 0.29 7471B 2-12-18 2-12-18 Lab ID: 02-116-17 Client ID: RTN004-1:8.0 Arsenic ND 12 6010D 2-12-18 2-12-18 Cadmium ND 0.62 6010D 2-12-18 2-12-18 Chromium 42 0.62 6010D 2-12-18 2-12-18 Lead 7.0 6.2 6010D 2-12-18 2-12-18 Mercury ND 0.31 7471B 2-12-18 2-12-18 81 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D METHOD BLANK QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0212SM1 Analyte Method Result PQL Arsenic 6010D ND 10 Barium 6010D ND 2.5 Cadmium 6010D ND 0.50 Chromium 6010D ND 0.50 Lead 6010D ND 5.0 Selenium 6010D ND 10 Silver 6010D ND 1.0 82 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B METHOD BLANK QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0212S1 Analyte Method Result PQL Mercury 7471B ND 0.25 83 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D DUPLICATE QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-116-08 Sample Duplicate Analyte Result Result RPD PQL Flags Arsenic ND ND NA 10 Barium 58.3 62.7 7 2.5 Cadmium ND ND NA 0.50 Chromium 31.1 31.0 0 0.50 Lead ND ND NA 5.0 Selenium ND ND NA 10 Silver ND ND NA 1.0 84 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B DUPLICATE QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-099-04 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.25 85 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D MS/MSD QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-116-08 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Arsenic 100 91.6 92 91.8 92 0 Barium 100 168 110 160 102 5 Cadmium 50.0 45.9 92 46.4 93 1 Chromium 100 126 95 122 91 3 Lead 250 233 93 234 94 1 Selenium 100 92.2 92 94.1 94 2 Silver 25.0 20.6 82 20.3 81 2 86 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL MERCURY EPA 7471B MS/MSD QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-099-04 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 0.500 0.487 97 0.493 99 1 87 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-116-05 Client ID: RTN002-4:6.2 Copper 940 6.8 6010D 2-14-18 2-14-18 Nickel 210 3.4 6010D 2-14-18 2-14-18 Zinc 1600 17 6010D 2-14-18 2-14-18 88 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D METHOD BLANK QUALITY CONTROL Date Extracted: 2-14-18 Date Analyzed: 2-14-18 Matrix: Soil Units: mg/kg (ppm) Lab ID: MB0214SM1 Analyte Method Result PQL Copper 6010D ND 1.0 Nickel 6010D ND 2.5 Zinc 6010D ND 2.5 89 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D DUPLICATE QUALITY CONTROL Date Extracted: 2-14-18 Date Analyzed: 2-14-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-083-01 Sample Duplicate Analyte Result Result RPD PQL Flags Copper 8.90 8.90 0 1.0 Nickel 35.3 33.7 5 2.5 Zinc 25.2 24.7 2 2.5 90 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 6010D MS/MSD QUALITY CONTROL Date Extracted: 2-14-18 Date Analyzed: 2-14-18 Matrix: Soil Units:mg/kg (ppm) Lab ID: 02-083-01 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Copper 50.0 59.1 100 59.1 100 0 Nickel 100 127 92 128 92 0 Zinc 100 120 95 120 95 0 91 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-116-09 Client ID: RTN003-2:GW Antimony ND 5.6 200.8 2-12-18 2-12-18 Arsenic 8.4 3.3 200.8 2-12-18 2-12-18 Beryllium ND 11 200.8 2-12-18 2-12-18 Cadmium ND 4.4 200.8 2-12-18 2-12-18 Chromium 35 11 200.8 2-12-18 2-12-18 Copper 32 11 200.8 2-12-18 2-12-18 Lead 11 1.1 200.8 2-12-18 2-12-18 Mercury ND 0.50 7470A 2-12-18 2-12-18 Nickel 29 22 200.8 2-12-18 2-12-18 Selenium ND 5.6 200.8 2-12-18 2-12-18 Silver ND 11 200.8 2-12-18 2-12-18 Thallium ND 5.6 200.8 2-12-18 2-12-18 Zinc 67 28 200.8 2-12-18 2-12-18 92 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-116-18 Client ID: RTN004-1:GW Arsenic 150 3.3 200.8 2-12-18 2-12-18 Cadmium 5.2 4.4 200.8 2-12-18 2-12-18 Chromium 310 11 200.8 2-12-18 2-12-18 Lead 2500 5.6 200.8 2-12-18 2-12-18 Mercury 0.70 0.50 7470A 2-12-18 2-12-18 93 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 METHOD BLANK QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0212WM1 Analyte Method Result PQL Antimony 200.8 ND 5.6 Arsenic 200.8 ND 3.3 Beryllium 200.8 ND 11 Cadmium 200.8 ND 4.4 Chromium 200.8 ND 11 Copper 200.8 ND 11 Lead 200.8 ND 1.1 Nickel 200.8 ND 22 Selenium 200.8 ND 5.6 Silver 200.8 ND 11 Thallium 200.8 ND 5.6 Zinc 200.8 ND 28 94 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A METHOD BLANK QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0212W1 Analyte Method Result PQL Mercury 7470A ND 0.50 95 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 DUPLICATE QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-011-01 Sample Duplicate Analyte Result Result RPD PQL Flags Antimony ND ND NA 5.6 Arsenic ND ND NA 3.3 Beryllium ND ND NA 11 Cadmium ND ND NA 4.4 Chromium ND ND NA 11 Copper ND ND NA 11 Lead ND ND NA 1.1 Nickel ND ND NA 22 Selenium ND ND NA 5.6 Silver ND ND NA 11 Thallium ND ND NA 5.6 Zinc ND ND NA 28 96 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A DUPLICATE QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.50 97 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL METALS EPA 200.8 MS/MSD QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-011-01 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Antimony 222 231 104 233 105 1 Arsenic 222 226 102 223 100 1 Beryllium 222 227 102 217 98 5 Cadmium 222 222 100 222 100 0 Chromium 222 218 98 214 97 2 Copper 222 208 94 206 93 1 Lead 222 216 97 214 96 1 Nickel 222 210 95 207 93 1 Selenium 222 221 99 222 100 1 Silver 222 221 99 221 100 0 Thallium 222 218 98 214 96 2 Zinc 222 233 105 228 103 2 98 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 TOTAL MERCURY EPA 7470A MS/MSD QUALITY CONTROL Date Extracted: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 12.5 11.0 88 10.8 86 2 99 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8/7470A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL EPA Method Prepared Analyzed Flags Lab ID: 02-116-09 Client ID: RTN003-2:GW Antimony ND 5.0 200.8 2-9-18 2-12-18 Arsenic ND 3.0 200.8 2-9-18 2-12-18 Beryllium ND 10 200.8 2-9-18 2-12-18 Cadmium ND 4.0 200.8 2-9-18 2-12-18 Chromium ND 10 200.8 2-9-18 2-12-18 Copper ND 10 200.8 2-9-18 2-12-18 Lead ND 1.0 200.8 2-9-18 2-12-18 Mercury ND 0.50 7470A 2-9-18 2-12-18 Nickel ND 20 200.8 2-9-18 2-12-18 Selenium ND 5.0 200.8 2-9-18 2-12-18 Silver ND 10 200.8 2-9-18 2-12-18 Thallium ND 5.0 200.8 2-9-18 2-12-18 Zinc ND 25 200.8 2-9-18 2-12-18 Lab ID: 02-116-18 Client ID: RTN004-1:GW Arsenic 20 3.0 200.8 2-9-18 2-12-18 Cadmium ND 4.0 200.8 2-9-18 2-12-18 Chromium ND 10 200.8 2-9-18 2-12-18 Lead 1.1 1.0 200.8 2-9-18 2-12-18 Mercury ND 0.50 7470A 2-9-18 2-12-18 100 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 METHOD BLANK QUALITY CONTROL Date Filtered: 2-12-18 Date Analyzed: 2-12-18 Matrix: Water Units: ug/L (ppb) Lab ID: MB0212F1 Analyte Method Result PQL Antimony 200.8 ND 5.0 Arsenic 200.8 ND 3.0 Beryllium 200.8 ND 10 Cadmium 200.8 ND 4.0 Chromium 200.8 ND 10 Copper 200.8 ND 10 Lead 200.8 ND 1.0 Nickel 200.8 ND 20 Selenium 200.8 ND 5.0 Silver 200.8 ND 10 Thallium 200.8 ND 5.0 Zinc 200.8 ND 25 101 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A METHOD BLANK QUALITY CONTROL Date Filtered: 2-9-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.50 102 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 DUPLICATE QUALITY CONTROL Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-016-07 Sample Duplicate Analyte Result Result RPD PQL Flags Antimony ND ND NA 5.0 Arsenic ND ND NA 3.0 Beryllium ND ND NA 10 Cadmium ND ND NA 4.0 Chromium ND ND NA 10 Copper ND ND NA 10 Lead ND ND NA 1.0 Nickel ND ND NA 20 Selenium ND ND NA 5.0 Silver ND ND NA 10 Thallium ND ND NA 5.0 Zinc ND ND NA 25 103 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A DUPLICATE QUALITY CONTROL Date Filtered: 2-9-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Sample Duplicate Analyte Result Result RPD PQL Flags Mercury ND ND NA 0.50 104 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 DISSOLVED METALS EPA 200.8 MS/MSD QUALITY CONTROL Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-016-07 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Antimony 200 206 103 208 104 1 Arsenic 200 217 109 215 108 1 Beryllium 200 208 104 214 107 3 Cadmium 200 209 105 210 105 0 Chromium 200 194 97 196 98 1 Copper 200 195 97 195 98 0 Lead 200 199 99 201 101 1 Nickel 200 189 94 194 97 3 Selenium 200 242 121 232 116 4 Silver 200 202 101 205 103 2 Thallium 200 200 100 203 102 2 Zinc 200 223 111 220 110 1 105 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 DISSOLVED MERCURY EPA 7470A MS/MSD QUALITY CONTROL Date Filtered: 2-9-18 Date Analyzed: 2-12-18 Matrix: Water Units:ug/L (ppb) Lab ID: 02-099-06 Spike Percent Percent Analyte Level MS Recovery MSD Recovery RPD Flags Mercury 12.5 11.4 91 11.4 91 0 106 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 CHLORINATED ACID HERBICIDES EPA 8151A Matrix: Soil Units: ug/Kg (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-2:4.5 Laboratory ID: 02-116-07 Dalapon ND 290 EPA 8151A 2-13-18 2-13-18 Dicamba ND 12 EPA 8151A 2-13-18 2-13-18 MCPP ND 1200 EPA 8151A 2-13-18 2-13-18 MCPA ND 1200 EPA 8151A 2-13-18 2-13-18 Dichlorprop ND 90 EPA 8151A 2-13-18 2-13-18 2,4-D ND 12 EPA 8151A 2-13-18 2-13-18 Pentachlorophenol ND 6.0 EPA 8151A 2-13-18 2-13-18 2,4,5-TP (Silvex) ND 12 EPA 8151A 2-13-18 2-13-18 2,4,5-T ND 12 EPA 8151A 2-13-18 2-13-18 2,4-DB ND 12 EPA 8151A 2-13-18 2-13-18 Dinoseb ND 12 EPA 8151A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 30 10-126 Client ID: RTN003-3:5.0 Laboratory ID: 02-116-13 Dalapon ND 300 EPA 8151A 2-13-18 2-13-18 Dicamba ND 12 EPA 8151A 2-13-18 2-13-18 MCPP ND 1200 EPA 8151A 2-13-18 2-13-18 MCPA ND 1200 EPA 8151A 2-13-18 2-13-18 Dichlorprop ND 93 EPA 8151A 2-13-18 2-13-18 2,4-D ND 12 EPA 8151A 2-13-18 2-13-18 Pentachlorophenol ND 6.2 EPA 8151A 2-13-18 2-13-18 2,4,5-TP (Silvex) ND 13 EPA 8151A 2-13-18 2-13-18 2,4,5-T ND 12 EPA 8151A 2-13-18 2-13-18 2,4-DB ND 12 EPA 8151A 2-13-18 2-13-18 Dinoseb ND 12 EPA 8151A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 27 10-126 107 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 CHLORINATED ACID HERBICIDES EPA 8151A Matrix: Soil Units: ug/Kg (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-3:12.5 Laboratory ID: 02-116-14 Dalapon ND 290 EPA 8151A 2-13-18 2-13-18 Dicamba ND 12 EPA 8151A 2-13-18 2-13-18 MCPP ND 1200 EPA 8151A 2-13-18 2-13-18 MCPA ND 1200 EPA 8151A 2-13-18 2-13-18 Dichlorprop ND 90 EPA 8151A 2-13-18 2-13-18 2,4-D ND 12 EPA 8151A 2-13-18 2-13-18 Pentachlorophenol ND 6.0 EPA 8151A 2-13-18 2-13-18 2,4,5-TP (Silvex) ND 12 EPA 8151A 2-13-18 2-13-18 2,4,5-T ND 12 EPA 8151A 2-13-18 2-13-18 2,4-DB ND 12 EPA 8151A 2-13-18 2-13-18 Dinoseb ND 12 EPA 8151A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 33 10-126 Client ID: RTN004-1:5.0 Laboratory ID: 02-116-16 Dalapon ND 270 EPA 8151A 2-13-18 2-13-18 Dicamba ND 11 EPA 8151A 2-13-18 2-13-18 MCPP ND 1100 EPA 8151A 2-13-18 2-13-18 MCPA ND 1100 EPA 8151A 2-13-18 2-13-18 Dichlorprop ND 83 EPA 8151A 2-13-18 2-13-18 2,4-D ND 11 EPA 8151A 2-13-18 2-13-18 Pentachlorophenol ND 5.6 EPA 8151A 2-13-18 2-13-18 2,4,5-TP (Silvex) ND 11 EPA 8151A 2-13-18 2-13-18 2,4,5-T ND 11 EPA 8151A 2-13-18 2-13-18 2,4-DB ND 11 EPA 8151A 2-13-18 2-13-18 Dinoseb ND 11 EPA 8151A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 30 10-126 108 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 CHLORINATED ACID HERBICIDES EPA 8151A Matrix: Soil Units: ug/Kg (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:8.0 Laboratory ID: 02-116-17 Dalapon ND 280 EPA 8151A 2-13-18 2-13-18 Dicamba ND 12 EPA 8151A 2-13-18 2-13-18 MCPP ND 1200 EPA 8151A 2-13-18 2-13-18 MCPA ND 1200 EPA 8151A 2-13-18 2-13-18 Dichlorprop ND 88 EPA 8151A 2-13-18 2-13-18 2,4-D ND 12 EPA 8151A 2-13-18 2-13-18 Pentachlorophenol ND 5.9 EPA 8151A 2-13-18 2-13-18 2,4,5-TP (Silvex) ND 12 EPA 8151A 2-13-18 2-13-18 2,4,5-T ND 12 EPA 8151A 2-13-18 2-13-18 2,4-DB ND 12 EPA 8151A 2-13-18 2-13-18 Dinoseb ND 12 EPA 8151A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 15 10-126 109 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 CHLORINATED ACID HERBICIDES EPA 8151A QUALITY CONTROL Matrix: Soil Units: ug/Kg (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0213S1 Dalapon ND 230 EPA 8151A 2-13-18 2-13-18 Dicamba ND 9.4 EPA 8151A 2-13-18 2-13-18 MCPP ND 940 EPA 8151A 2-13-18 2-13-18 MCPA ND 940 EPA 8151A 2-13-18 2-13-18 Dichlorprop ND 71 EPA 8151A 2-13-18 2-13-18 2,4-D ND 9.4 EPA 8151A 2-13-18 2-13-18 Pentachlorophenol ND 4.8 EPA 8151A 2-13-18 2-13-18 2,4,5-TP (Silvex) ND 9.5 EPA 8151A 2-13-18 2-13-18 2,4,5-T ND 9.5 EPA 8151A 2-13-18 2-13-18 2,4-DB ND 9.5 EPA 8151A 2-13-18 2-13-18 Dinoseb ND 9.5 EPA 8151A 2-13-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 48 10-126 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0213S1 SB SBD SB SBD SB SBD Dicamba 75.0 69.9 100 100 N/A 75 70 26-113 7 20 2,4-D 69.8 57.4 100 100 N/A 70 57 24-117 19 21 Pentachlorophenol 7.18 7.36 10.0 10.0 N/A 72 74 38-112 2 23 2,4,5-T 61.6 58.6 100 100 N/A 62 59 21-110 5 19 2,4-DB 50.0 40.5 100 100 N/A 50 40 22-119 21 19 L Surrogate: DCAA 56 49 10-126 110 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 CHLORINATED ACID HERBICIDES EPA 8151A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-2:GW Laboratory ID: 02-116-09 Dalapon ND 0.37 EPA 8151A 2-12-18 2-13-18 Dicamba ND 0.038 EPA 8151A 2-12-18 2-13-18 MCPP ND 5.7 EPA 8151A 2-12-18 2-13-18 MCPA ND 5.7 EPA 8151A 2-12-18 2-13-18 Dichlorprop ND 0.038 EPA 8151A 2-12-18 2-13-18 2,4-D ND 0.076 EPA 8151A 2-12-18 2-13-18 Pentachlorophenol ND 0.0077 EPA 8151A 2-12-18 2-13-18 2,4,5-TP (Silvex) ND 0.039 EPA 8151A 2-12-18 2-13-18 2,4,5-T ND 0.058 EPA 8151A 2-12-18 2-13-18 2,4-DB ND 0.058 EPA 8151A 2-12-18 2-13-18 Dinoseb ND 0.038 EPA 8151A 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 55 17-122 Client ID: RTN003-3:GW Laboratory ID: 02-116-15 Dalapon ND 0.38 EPA 8151A 2-12-18 2-13-18 Dicamba ND 0.039 EPA 8151A 2-12-18 2-13-18 MCPP ND 5.8 EPA 8151A 2-12-18 2-13-18 MCPA ND 5.8 EPA 8151A 2-12-18 2-13-18 Dichlorprop ND 0.039 EPA 8151A 2-12-18 2-13-18 2,4-D ND 0.077 EPA 8151A 2-12-18 2-13-18 Pentachlorophenol ND 0.0078 EPA 8151A 2-12-18 2-13-18 2,4,5-TP (Silvex) ND 0.039 EPA 8151A 2-12-18 2-13-18 2,4,5-T ND 0.058 EPA 8151A 2-12-18 2-13-18 2,4-DB ND 0.058 EPA 8151A 2-12-18 2-13-18 Dinoseb ND 0.039 EPA 8151A 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 53 17-122 111 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 CHLORINATED ACID HERBICIDES EPA 8151A Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN004-1:GW Laboratory ID: 02-116-18 Dalapon ND 0.38 EPA 8151A 2-12-18 2-13-18 Dicamba ND 0.039 EPA 8151A 2-12-18 2-13-18 MCPP ND 5.8 EPA 8151A 2-12-18 2-13-18 MCPA ND 5.8 EPA 8151A 2-12-18 2-13-18 Dichlorprop ND 0.039 EPA 8151A 2-12-18 2-13-18 2,4-D ND 0.078 EPA 8151A 2-12-18 2-13-18 Pentachlorophenol ND 0.0079 EPA 8151A 2-12-18 2-13-18 2,4,5-TP (Silvex) ND 0.040 EPA 8151A 2-12-18 2-13-18 2,4,5-T ND 0.059 EPA 8151A 2-12-18 2-13-18 2,4-DB ND 0.059 EPA 8151A 2-12-18 2-13-18 Dinoseb ND 0.039 EPA 8151A 2-12-18 2-13-18 Surrogate: Percent Recovery Control Limits DCAA 53 17-122 112 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 CHLORINATED ACID HERBICIDES EPA 8151A QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212W1 Dalapon ND 0.46 EPA 8151A 2-12-18 2-12-18 Dicamba ND 0.047 EPA 8151A 2-12-18 2-12-18 MCPP ND 7.0 EPA 8151A 2-12-18 2-12-18 MCPA ND 7.0 EPA 8151A 2-12-18 2-12-18 Dichlorprop ND 0.047 EPA 8151A 2-12-18 2-12-18 2,4-D ND 0.094 EPA 8151A 2-12-18 2-12-18 Pentachlorophenol ND 0.0095 EPA 8151A 2-12-18 2-12-18 2,4,5-TP (Silvex) ND 0.048 EPA 8151A 2-12-18 2-12-18 2,4,5-T ND 0.071 EPA 8151A 2-12-18 2-12-18 2,4-DB ND 0.071 EPA 8151A 2-12-18 2-12-18 Dinoseb ND 0.047 EPA 8151A 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits DCAA 58 17-122 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0212W1 SB SBD SB SBD SB SBD Dicamba 0.454 0.481 1.00 1.00 N/A 45 48 30-108 6 21 2,4-D 0.461 0.421 1.00 1.00 N/A 46 42 25-130 9 26 Pentachlorophenol 0.0687 0.0832 0.100 0.100 N/A 69 83 50-108 19 20 2,4,5-T 0.485 0.479 1.00 1.00 N/A 49 48 22-112 1 24 2,4-DB 0.485 0.455 1.00 1.00 N/A 49 46 27-128 6 18 Surrogate: DCAA 54 57 17-122 113 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 1,2-DIBROMOETHANE (EDB) EPA 8011 Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: RTN003-1:GW Laboratory ID: 02-116-12 EDB ND 0.0097 EPA 8011 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits TCMX 26 25-143 114 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 1,2-DIBROMOETHANE (EDB) EPA 8011 QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0212W1 EDB ND 0.010 EPA 8011 2-12-18 2-12-18 Surrogate: Percent Recovery Control Limits TCMX 100 25-143 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0212W1 SB SBD SB SBD SB SBD EDB 0.101 0.0980 0.100 0.100 N/A 101 98 72-135 3 10 Surrogate: TCMX 95 103 25-143 115 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: February 15, 2018 Samples Submitted: February 10, 2018 Laboratory Reference: 1802-116 Project: 21-1-16700-301 % MOISTURE Date Analyzed: 2-12-18 Client ID Lab ID % Moisture RTN002-2:4.0 02-116-01 11 RTN002-2:7.5 02-116-02 23 RTN002-4:5.0 02-116-04 8 RTN002-4:6.2 02-116-05 27 RTN003-2:4.5 02-116-07 21 RTN003-2:8.0 02-116-08 26 RTN003-1:4.0 02-116-10 10 RTN003-1:9.0 02-116-11 34 RTN003-3:5.0 02-116-13 24 RTN003-3:12.5 02-116-14 21 RTN004-1:5.0 02-116-16 15 RTN004-1:8.0 02-116-17 19 116 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference 21-1-16700-301 APPENDIX C IMPORTANT INFORMATION ABOUT YOUR ENVIRONMENTAL SITE ASSESSMENT/EVALUATION REPORT Page 1 of 2 1/2018 SHANNON & WILSON, INC. Geotechnical and Environmental Consultants Dated: Attachment to and part of Report 21-1-16700-301 Date: March 9, 2018 To: Mr. Mark Menard Sound Transit IMPORTANT INFORMATION ABOUT YOUR ENVIRONMENTAL SITE ASSESSMENT/EVALUATION REPORT ENVIRONMENTAL SITE ASSESSMENTS/EVALUATIONS ARE PERFORMED FOR SPECIFIC PURPOSES AND FOR SPECIFIC CLIENTS. This report was prepared to meet the needs you specified with respect to your specific site and your risk management preferences. Unless indicated otherwise, we prepared your report expressly for you and for the purposes you indicated. No one other than you should use this report for any purpose without first conferring with us. No one is authorized to use this report for any purpose other than that originally contemplated without our prior written consent. The findings and conclusions documented in this site assessment/evaluation have been prepared for specific application to this project and have been developed in a manner consistent with that level of care and skill normally exercised by members of the environmental science profession currently practicing under similar conditions in this area. The conclusions presented are based on interpretation of information currently available to us and are made within the operational scope, budget, and schedule constraints of this project. No warranty, express or implied, is made. OUR REPORT IS BASED ON PROJECT-SPECIFIC FACTORS. Our environmental site assessment is based on several factors and may include (but not be limited to): reviewing public documents to chronicle site ownership for the past 30, 40, or more years; investigating the site's regulatory history to learn about permits granted or citations issued; determining prior uses of the site and those adjacent to it; reviewing available topographic and real estate maps, historical aerial photos, geologic information, and hydrologic data; reviewing readily available published information about surface and subsurface conditions; reviewing federal and state lists of known and potentially contaminated sites; evaluating the potential for naturally occurring hazards; and interviewing public officials, owners/operators, and/or adjacent owners with respect to local concerns and environmental conditions. Except as noted within the text of the report, no sampling or quantitative laboratory testing was performed by us as part of this site assessment. Where such analyses were conducted by an outside laboratory, Shannon & Wilson relied upon the data provided and did not conduct an independent evaluation regarding the reliability of the data. CONDITIONS CAN CHANGE. Site conditions, both surface and subsurface, may be affected as a result of natural processes or human influence. An environmental site assessment/evaluation is based on conditions that existed at the time of the evaluation. Because so many aspects of a historical review rely on third party information, most consultants will refuse to certify (warrant) that a site is free of contaminants, as it is impossible to know with absolute certainty if such a condition exists. Contaminants may be present in areas that were not surveyed or sampled, or may migrate to areas that showed no signs of contamination at the time they were studied. Unless your consultant indicates otherwise, your report should not be construed to represent geotechnical subsurface conditions at or adjacent to the site and does not provide sufficient information for construction-related activities. Your report also should not be used following floods, earthquakes, or other acts of nature; if the size or configuration of the site is altered; if the location of the site is modified; or if there is a change of ownership and/or use of the property. INCIDENTAL DAMAGE MAY OCCUR DURING SAMPLING ACTIVITIES. Incidental damage to a facility may occur during sampling activities. Asbestos and lead-based paint sampling often require destructive sampling of pipe insulation, floor tile, walls, doors, ceiling tile, roofing, and other building materials. Shannon & Wilson does not provide for paint repair. Limited repair of asbestos sample locations are provided. However, Shannon & Wilson neither warranties repairs made by our field personnel, nor are we held liable for injuries or damages as a result of those repairs. If you desire a specific form of repair, such as those provided by a licensed roofing contractor, you need to request the specific repair at the time of the proposal. The owner is responsible for repair methods that are not specified in the proposal. Page 2 of 2 1/2018 READ RESPONSIBILITY CLAUSES CAREFULLY. Environmental site assessments/evaluations are less exact than other design disciplines because they are based extensively on judgment and opinion, and there may not have been any (or very limited) investigation of actual subsurface conditions. Wholly unwarranted claims have been lodged against consultants. To limit this exposure, consultants have developed a number of clauses for use in their contracts, reports, and other documents. These responsibility clauses are not exculpatory clauses designed to transfer the consultant's liabilities to other parties; rather, they are definitive clauses that identify where responsibilities begin and end. Their use helps all parties involved recognize their individual responsibilities and take appropriate action. Some of these definitive clauses may appear in this report, and you are encouraged to read them closely. Your consultant will be pleased to give full and frank answers to your questions. Consultants cannot accept responsibility for problems that may develop if they are not consulted after factors considered in their reports have changed, or conditions at the site have changed. Therefore, it is incumbent upon you to notify your consultant of any factors that may have changed prior to submission of the final assessment/evaluation. An assessment/evaluation of a site helps reduce your risk, but does not eliminate it. Even the most rigorous professional assessment may fail to identify all existing conditions. ONE OF THE OBLIGATIONS OF YOUR CONSULTANT IS TO PROTECT THE SAFETY, HEALTH, PROPERTY, AND WELFARE OF THE PUBLIC. If our environmental site assessment/evaluation discloses the existence of conditions that may endanger the safety, health, property, or welfare of the public, we may be obligated under rules of professional conduct, statutory law, or common law to notify you and others of these conditions. The preceding paragraphs are based on information provided by the ASFE/Association of Engineering Firms Practicing in the Geosciences, Silver Spring, Maryland Remedial Cost Estimate Sound Transit Right-of-Way #RTN001 Through #RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington March 12, 2018 Submitted To: Mr. Mark Menard Sound Transit 401 South Jackson Street Seattle, Washington 98104 By: Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, Washington 98103 21-1-16700-302 21-1-16700-302-R1f.docx/wp/lkn 21-1-16700-302 i EXECUTIVE SUMMARY Shannon & Wilson, Inc. has completed a remedial cost estimate for Sound Transit Right-of-Way Numbers RTN001 through RTN004 located at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington (the Site). The remedial cost estimate is based upon contaminated soil and groundwater data discovered during a 2018 Phase II Environmental Site Assessment of the Site. Shannon & Wilson was tasked with developing costs for a best-case, a worst-case, and a probable remedial scenario. The following costs were developed for each remedial scenario: Best-Case Scenario: $671,872 Probable Scenario: $1,278,529 Worse-Case Scenario: $2,741,709 21-1-16700-302-R1f.docx/wp/lkn 21-1-16700-302 ii TABLE OF CONTENTS Page EXECUTIVE SUMMARY ............................................................................................................. i 1.0 INTRODUCTION..................................................................................................................1 1.1 Authorization..............................................................................................................1 1.2 Objective ....................................................................................................................1 2.0 BACKGROUND....................................................................................................................1 2.1 Site Location and Description....................................................................................1 2.2 Summary of Phase II Environmental Site Assessment (ESA)...................................2 3.0 AREAS OF CONCERN.........................................................................................................4 3.1 RTN001 Service Building..........................................................................................4 3.2 RTN002 Body Shop...................................................................................................4 3.3 Parking Lot Hotspots..................................................................................................4 4.0 REMEDIAL SCENARIOS....................................................................................................5 4.1 Best-Case Remedial Scenario ....................................................................................5 4.2 Worst Case Remedial Scenario..................................................................................5 4.3 Probable Remedial Scenario ......................................................................................6 5.0 FOLLOW-UP WORK ASSOCIATED WITH REMEDIAL SCENARIOS .........................7 5.1 Remedial Activity Reporting .....................................................................................7 5.2 Quarterly Groundwater Monitoring...........................................................................7 5.3 Preparation of Site Closure Report.............................................................................8 5.4 Regulatory Interaction................................................................................................8 6.0 COST ESTIMATE.................................................................................................................8 7.0 ASSUMPTIONS AND LIMITATIONS................................................................................9 8.0 REFERENCES.....................................................................................................................12 TABLES 1 Cost Estimate Summary 2 Best-Case Scenario Cost Estimate (3 pages) 3 Probable Scenario Cost Estimate (3 pages) 4 Worst-Case Scenario Cost Estimate (4 pages) TABLE OF CONTENTS (cont.) 21-1-16700-302-R1f.docx/wp/lkn 21-1-16700-302 iii FIGURES 1 Vicinity Map 2 Approximate Remedial Excavation Locations 3 Biostimulation Compound Application Locations APPENDIX Important Information About Your Environmental Site Assessment/Evaluation Report 21-1-16700-302-R1f.docx/evp 21-1-16700-302 1 REMEDIAL COST ESTIMATE SOUND TRANSIT RIGHT-OF-WAY #RTN001 THROUGH #RTN004 SOUND FORD PROPERTY 750 RAINIER AVENUE S.AND 200S.GRADY WAY RENTON,WASHINGTON 1.0 INTRODUCTION 1.1 Authorization Shannon & Wilson, Inc. completed a Remedial Cost Estimate for Sound Transit Right-of-Way Numbers RTN001 through RTN004 located at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington (the Site). The work was conducted in accordance with our proposal dated January 12, 2018, under Sound Transit contract #RTA/AE 0107-14C, Task Order 31. The task order was authorized by Mr. Kevin Workman and Notice to Proceed was provided on January 26, 2018. This study was conducted to assist Sound Transit’s plans to acquire the parcels as part of the Interstate Highway 405 (I-405) Bus Rapid Transit project. 1.2 Objective The purpose of this cost estimate is to provide remedial cost estimates for best-case, worst-case, and probable remedial actions scenarios to support the appraisal of the Site. The goal of the remedial effort in each is to remediate soil and groundwater contamination to levels below the Model Toxics Control Act (MTCA) Method A cleanup criteria (Washington State Department of Ecololgy [Ecology], 2013). This report has eight sections: introduction, background, areas of concern, remedial scenarios, follow-up work associated with remedial scenarios, cost estimate, assumptions and limitations, and references. 2.0 BACKGROUND 2.1 Site Location and Description The Site is located in the northwest quarter of the northeast quarter of Section 19, Township 23 North, Range 5 East of the Willamette Meridian (Figure 1). The parcels that constitute the Site are shown in Figures 2 and 3 and are identified and described as follows: RTN001:750 Rainier Avenue S., King County tax parcel #192305-9035, consisting of 3.43 acres occupied by a 46,980-square-foot auto showroom and shop building. 21-1-16700-302-R1f.docx/evp 21-1-16700-302 2 The showroom portion of the building is vacant and the shop area is used by Sound Ford for auto detailing. RTN002:750 Rainier Avenue S., King County tax parcel #192305-9063, which consists of 1.98 acres occupied by a 12,260-square-foot auto body shop operated by Sound Ford under the name Sound Collision Center. In addition, three towers for power transmission lines are located in the eastern portion of the site. RTN003:200 S. Grady Way, King County tax parcel #192305-9068, consisting of 1.89 acres occupied by a 3,710-square-foot used car sales office and service garage at the western end of the parcel (which is currently vacant) and a 6,360-square-foot auto parts office and service garage at the eastern end (leased and occupied by Walker’s Renton Mazda). RTN004:200 S. Grady Way, King County tax parcel #192305-9074, which consists of 0.99 acres of vacant land. 2.2 Summary of Phase II Environmental Site Assessment (ESA) Shannon & Wilson conducted a Phase II ESA to evaluate the Site conditions in advance of the I-405 Bus Rapid Transit project (Shannon & Wilson, 2018). The following conclusions were made based on limited sampling: Soil contaminated with diesel- and lube oil-range petroleum hydrocarbons above MTCA cleanup criteria was encountered near the northeast portion of the RTN001 service building. This contamination is likely associated with numerous former aboveground storage tanks (ASTs) and underground storage tanks (USTs) that previously contained automatic transmission fluid and motor oil, two existing waste oil ASTs in and near the building, hydraulic hoists, and shop activities. Contaminated soil above the cleanup criteria is also located near the north end of the RTN002 body shop and at “hotspots” located in the parking lot west of the RTN001 service building, east of the RTN002 body shop, and to the south of RTN004 Walker’s Renton Mazda. Gasoline constituents benzene, toluene, ethylbenzene, and xylenes were encountered in soil samples located north of the RTN001 service building and near the former gasoline dispenser and USTs. Although these detections are not in excess of the MTCA cleanup criteria, they are an indication that residual contaminated soil may be present in this area. Detectable levels of total petroleum hydrocarbons as diesel (TPH-D) and as oil TPH-O are present in soil at three of the four locations where former USTs were removed. At each of these locations, there was evidence of stained soil and/or hydrocarbon odors within or at the bottom of the fill material of the former excavation. This indicates that there is likely residual contaminated soil still present at RTN001-2, RTN001-4, and RTN001-10. Although TPH-D and TPH-O were not 21-1-16700-302-R1f.docx/evp 21-1-16700-302 3 detected at RTN001-3, these contaminants were detected in samples RTN002-1 and RTN002-2 and may likely be associated with the storage and conveyance of waste oil from the garage to the UST. The presence of polycyclic aromatic hydrocarbons (PAHs) was detected in soil samples beneath and near the service (RTN001) and body shop (RTN002) buildings likely associated with automotive related use. It is likely that the detection at RTN004-1 is associated with creosote from treated wood from the former railway line as creosote odors were observed during sampling. It is likely that the presence of PAHs in soil will be encountered at other locations along the former electric railway line along the southern boundary of parcel RTN004. Polychlorinated biphenyls (PCBs) were detected below the MTCA cleanup criteria in soil in the upper 6 feet at RTN002-3 and RTN002-4. It is likely the presence of PCBs is associated with spills, drips, and leaks from hydraulic oil used at the body shop. Groundwater contaminated with diesel- and lube oil-range petroleum hydrocarbons above the MTCA cleanup criteria was encountered beneath the RTN001 service building and in the north area of the RTN002 body shop. This contamination appears to indicate a plume of groundwater contamination that is migrating southward from the soil contamination source area that is located in the north area of the service building. The plume appears to be bound to the north by RTN001-1, to the east by RTN001-4, to the south by RTN003-2, and to the west by RTN001-11. Elevated concentrations of arsenic, chromium, and lead were detected in groundwater samples beneath and near the RTN001 service building, near the RTN003 used car sales office, and south of the RTN004 Walker’s Renton Mazda building along the former electric railway line. Except for arsenic, these elevated concentrations are present in the total and not the dissolved analytical results. It is common to observe elevated concentrations of the total metals analysis due to the high turbidity in samples collected from a probe rig and not a fully developed monitoring well. Dissolved metals concentrations are likely to be more representative of groundwater conditions as typically only the dissolved metals fraction will migrate through porous media. Elevated concentrations of dissolved arsenic may be due to organic soil- induced oxidation-reduction conditions, as the presence of organic matter was observed during sample collection. Vinyl chloride is present above the MTCA Method A cleanup criteria of 0.20 microgram per liter (μg/L) in groundwater at RTN001-10 (0.33 μg/L). In accordance with Ecology’s Statistical Guidance for Ecology Site Managers (Ecology, 1992), the following requirements have been met to demonstrate compliance: ʊ The upper 95th percentile confidence limit on the true mean concentration at the Site must be less than the cleanup level - upper 95 th confidence limit (0.13 μg/L) does not exceed the MTCA Method A cleanup of 0.20 μg/L. 21-1-16700-302-R1f.docx/evp 21-1-16700-302 4 ʊ Less than 10% of the samples can exceed the cleanup level – one of the 19 total groundwater samples was detected for vinyl chloride, this detection exceeded the MTCA Method A cleanup level, this calculates to 5.2 percent of the total. ʊ No single sample can be greater than two times the cleanup level – the concentration of RTN001-10:GW (0.33 μg/L) is less than two times the MTCA Method A cleanup criteria. Vinyl chloride was not detected at sample locations within the vicinity of RTN001-10, which indicates that the presence of this contaminant is likely isolated and not widespread. 3.0 AREAS OF CONCERN Three areas of concern were developed based on the Phase II ESA. The areas of concern include the RTN001 Service Building, the RTN002 Body Shop, and parking lot hotspots. Groundwater was encountered between 7 and 12 feet below ground surface (bgs) across the Site, and for the sake of this cost estimate it is assumed groundwater will be encountered at 11 feet during excavation. Each area of concern is described below. 3.1 RTN001 Service Building Contaminated soil exists above MTCA Method A cleanup levels near the northeast portion of the existing RTN001 Service Building. A groundwater plume of lube oil and diesel appears to extend south of the contaminated soil area past the southern end of the building. This contamination is assumed to exist due to numerous former USTs including former automatic transmission fluid, motor oil, and two waste oil USTs in and near the building. The building contains hydraulic hoists which may have associated underground hydraulic fluid reservoirs. 3.2 RTN002 Body Shop Groundwater contamination of hydrocarbons above MTCA Method A cleanup levels is present near the northern end of the existing Body Shop on RTN002. This groundwater contamination is likely due to a former waste oil UST near the northwest corner of the RTN002 Body Shop. 3.3 Parking Lot Hotspots Three explorations conducted during the Phase II ESA revealed contamination “hotspots” in shallow soil. The hotspots are located in the parking lot west of the RTN001 Service Building, the parking lot east of the RTN002 Body Shop, and south of the Walker’s Renton Mazda Building. These hotspots are likely from surface leaks associated with previous site use. 21-1-16700-302-R1f.docx/evp 21-1-16700-302 5 4.0 REMEDIAL SCENARIOS Based on the 2018 Phase II ESA, best-case, worst-case, and probable remedial scenarios were developed for separate areas of concern. The remedial technologies selected include excavation, biostimulation compound application, and groundwater monitoring. Best-case, probable, and worst-case scenarios are presented below with remedial approaches for each area of concern. These scenarios were developed based upon limited sampling and if an No Further Action (NFA) determination is to be granted by Ecology, a complete Remedial Investigation/Feasibility Study should be completed in accordance with the MTCA. 4.1 Best-Case Remedial Scenario RTN001 Service Building: In the best-case remedial scenario, no hydraulic fluid reservoirs from the hoists need removal. Excavation and dewatering of a 75-foot by 60-foot area to 11 feet bgs near the northeast corner of the RTN001 Service Building to remove the contaminated soil will be completed. A total of 12 confirmation samples will be taken from the excavation base and 10 will be taken from the sidewalls. The excavation will be backfilled with clean material following the receipt of the confirmation samples. The excavation and backfilling work will take one week. Four monitoring wells will be installed. Groundwater will be monitored quarterly for two years. RTN002 Body Shop: In the best-case remedial scenario, biostimulation compound similar or equal to Regenesis ORC ® will be injected to treat a 45-foot by 55-foot zone of groundwater contamination in the northern area of the existing RTN002 Body Shop. Injection will take three to four days. Four monitoring wells will be installed. Groundwater will be monitored quarterly for two years. Parking Lot Hotspots: In the best-case remedial scenario, the three hotspot areas identified in the parking lots will be excavated to a depth of 5 to 8 feet with a 20-foot by 20-foot footprint. Five confirmation samples will be taken from each of the excavations. The excavation will be backfilled with clean material. No other contamination requiring hotspot excavation is discovered during construction. 4.2 Worst Case Remedial Scenario RTN001 Service Building: In the worst-case remedial scenario, four hydraulic fluid reservoirs from the hoists need removal. Excavation and dewatering a 120-foot by 150-foot area to 11 feet bgs near the northeast corner of the RTN001 Service Building to the remove the contaminated soil will be completed. A total of 45 confirmation samples will be taken from the excavation sidewalls and 27 will be taken from the sidewalls. A biostimulation compound similar or equal to Regenesis PersulfOx® will be mixed into the base of the excavation to further remediation. The excavation will then be backfilled with clean material. Excavation and biostimulation compound 21-1-16700-302-R1f.docx/evp 21-1-16700-302 6 application takes two weeks. Six monitoring wells will be installed. Three annual biostimulation compound injection events occur in a 70-foot by 150-foot injection area near the southern end of the excavation to supply the groundwater plume with enough biostimulation compound to continue shrinking. Groundwater will be monitored for three years. RTN002 Body Shop: In the worst-case remedial scenario, biostimulation compound similar or equal to Regenesis ORC® will be injected to treat a 75-foot by 120-foot zone of groundwater contamination in the northern end of the RTN002 Body Shop. Injection will take six to eight days. Six monitoring wells will be installed. Groundwater will be monitored for three years. Parking Lot Hotspots:In the worst-case remedial scenario, the three hotspot areas identified in the parking lots will be excavated to a depth of 5 to 8 feet with a 20-foot by 20-foot footprint. Five confirmation samples will be taken from each of the excavations. The excavations will be backfilled with clean material. The excavations will be completed in two days. Additional contamination requiring additional hotspot excavation is expected to be discovered during construction and will increase the parking lot hotspot excavations cost by 50%. 4.3 Probable Remedial Scenario RTN001 Service Building: In the probable remedial scenario, two hydraulic fluid reservoirs from the hoists need removal. Excavation and dewatering of a 90-foot by 90-foot area to 11 feet bgs near the northeast corner of the RTN001 Service Building to remove the source will be completed. A total of 20 confirmation samples will be taken from the excavation base and 16 will be taken from the sidewalls. A biostimulation compound similar or equal to Regenesis PersulfOx ® will be mixed into the base of the excavation to further remediation. The excavation will then be backfilled with clean material. Excavation and biostimulation activities takes one and a half weeks. Five monitoring wells will be installed. One additional biostimulation injection event will take place one year after the excavation. This biostimulation injection will occur in a 70-foot by 150-foot injection area near the southern end of the excavation to ensure the groundwater plume has enough biostimulation compound to continue shrinking. Groundwater will be monitored for two years. RTN002 Body Shop: In the probable remedial scenario, biostimulation compound similar or equal to Regenesis ORC® will be injected to treat a 50-foot by 75-foot zone of groundwater contamination in the northern end of the RTN002 Body Shop. Injection will take five to six days. Five monitoring wells will be installed. Groundwater will be monitored for two years. Parking Lot Hotspots: In the probable remedial scenario, the three hotspot areas identified in the parking lots will be excavated to a depth of 5 to 8 feet with a 20-foot by 20-foot footprint. Five confirmation samples will be taken from each of the excavations. The excavations will be completed in two days. Additional contamination requiring additional hotspot excavation is expected to be discovered 21-1-16700-302-R1f.docx/evp 21-1-16700-302 7 during construction and will increase the parking lot hotspot excavations cost by 25%. 5.0 FOLLOW-UP WORK ASSOCIATED WITH REMEDIAL SCENARIOS Follow-up monitoring, recordkeeping, and regulatory interaction must take place if a NFA determination is to be granted by Ecology. The best-case, worst-case, and probable scenarios impact the cost of these actions. The worst-case scenario assumes more costs and labor associated with sampling more monitoring wells for a longer period of time, a larger site closure report, and more regulatory interactions. The best-case scenario assumes less costs and labor associated with sampling the fewest monitoring wells, a small site closure report, and efficient regulatory interactions. The probable scenario is in between the best- and worst-case scenarios. 5.1 Remedial Activity Reporting Following remedial activities, a report will be generated summarizing the events which took place. Remedial activities to be included in the report are the RTN001 Service Building excavation and biostimulation compound application, biostimulation compound injection at the RTN002 Body Shop, excavation at the parking lot hotspots, excavation along the RTN004 electric railway, and groundwater monitoring well installation. 5.2 Quarterly Groundwater Monitoring In order to obtain a NFA determination, a minimum of two years of quarterly groundwater sampling would need to be conducted at the site after the first round of biological stimulant application is completed. The monitoring events will be conducted to document attainment of cleanup levels. Each quarter will consist of groundwater wells being sampled using low-flow sampling techniques and submitted to a local analytical laboratory for analysis of identified contaminants of concern. It is assumed that samples will be analyzed on a standard 7- to 10-day turn-around time. Quarterly groundwater monitoring reports will be prepared and will include a summary of groundwater sampling data and events and the interpretation of analytical groundwater results. Investigation-derived waste (IDW) generated during well installation (consisting of soil cuttings and decontamination fluid from the injection locations) will be collected and stored in sealed drums at a secure location on the site. A local disposal contractor will be contracted to remove and properly dispose of the IDW. 21-1-16700-302-R1f.docx/evp 21-1-16700-302 8 Drums containing IDW generated during groundwater sampling events will remain in a secure location at the site and will periodically be disposed of during the quarterly groundwater sampling events. 5.3 Preparation of Site Closure Report Upon completion of groundwater monitoring, a Site Closure Report will be prepared presenting a detailed summary of the environmental conditions at the Site including a summary of the actions and conclusions drawn from remedial actions, monitoring, analytical laboratory reports, boring logs, figures, and cross sections. The Closure Report will be submitted to Ecology along with a voluntary cleanup program (VCP) application, if not already completed following monitoring well installation. 5.4 Regulatory Interaction The objective of the remedial action proposed at the Site is to obtain a written determination from Ecology stating that NFA is necessary to address any of the contamination at the site. To obtain an NFA determination, the Site must be enrolled into Ecology’s VCP. Once enrolled, Ecology will assign a project manager who can provide feedback and written opinions on the conducted remedial action. Ecology charges an application fee and will bill the applicant for the time spent on the project. This cost estimate includes preparation of a VCP application, an application fee, estimated Ecology fees, coordination, and effort to upload the analytical data into Ecology’s electronic. database. 6.0 COST ESTIMATE Based on the review of previous environmental reports and the goals of the remedial efforts, the following costs were developed for each scenario to remediate the known soil and groundwater contamination on the Site: Best-Case Scenario: $671,872 Probable Scenario: $1,278,529 Worse-Case Scenario: $2,741,709 A summary of the cost estimate scenarios is presented in Table 1. The best-case scenario cost estimate is presented in Table 2. The probable scenario cost estimate is presented in Table 3. The worst-case scenario cost estimate is presented in Table 4. Each cost estimate has been prepared based on the review of information provided in the draft 2018 Phase II ESA. 21-1-16700-302-R1f.docx/evp 21-1-16700-302 9 7.0 ASSUMPTIONS AND LIMITATIONS The following assumptions were made in the development of this remedial cost estimate: No contingency has been placed on the cost estimate. Contingencies may range from 10 to 45% of any calculated cost. We have assumed the contamination does not extend off site. If contamination is found to extend off site, an additional 30% of the overall cost should be added to the project. It is assumed that the building will be demolished by the time remedial activities are to take place. This cost estimate does not include any additional site characterization, and was completed with limited sampling data. Costs associated with additional site characterization are not included within this remedial cost estimate. Quantity estimates for excavations assume vertical sidewalls without shoring. The soil excavated from the site does not meet criteria to be classified as Dangerous Waste and may be disposed of at a certified Subtitle D facility. Soil excavated for remedial purposes will not be reused onsite and will be transported to and disposed of at a Subtitle D facility. Soil weighs 1.5 tons per cubic yard. Confirmation samples from excavations will be taken at a rate of one sample for every 20 feet of sidewall and one sample for every 400 square feet of excavation base. Quantity of Regenesis ORC® or equivalent to be injected is at a rate of 0.9 pound per square foot of impacted area with a vertical horizon of 9 feet. Quantity of Regenesis PersulfOx ® or equivalent applied is at a rate of 2.7 pounds per square foot of impacted area. Paving and site restoration following excavation is not included in this cost estimate as it is assumed the site will be repaved for the proposed construction. The cost estimate does not include any cost associated with building demolition including the abatement of hazardous materials and removal of ASTs. Depth to groundwater was encountered from 7 to 12 feet bgs during site explorations. For excavation and injection calculations, 11 feet bgs was used as the depth to groundwater. Dewatering costs vary greatly upon encountered groundwater conditions and disposal of the groundwater. This cost estimate includes an assumed dewatering cost of $9 per square foot for the dewatering of the RTN001 Body Shop excavation. The smaller excavations are assumed to not require dewatering. 21-1-16700-302-R1f.docx/evp 21-1-16700-302 10 Arsenic contamination observed in groundwater is a result of the hydrocarbon contamination present on site. The arsenic concentrations are assumed to decrease to below cleanup levels with the remediation of hydrocarbons. Costs associated with handling and removal of soil and/or groundwater below MTCA Method A cleanup levels are not considered in this cost estimate. Only one mobilization fee will be charged by the excavation contractor. The mobilization fee is included in the RTN001 excavation estimate. VCP costs (payment to Ecology) have been assumed based on previous experience. While the 2018 Phase II ESA report identified areas of known and potential contamination and provided some limits on extent, it does not provide sufficient information to fully characterize the vertical and lateral distribution of contaminants. Therefore, it has been necessary to make assumptions about the extent of contamination in order to develop our cost estimates. For this reason, our estimates are preliminary and should be used only as a guide in assessing the environmental liabilities associated with the site. Sound Transit should maintain a contingency fund for handling unexpected contamination during construction. Please note that no contingency has been included in this cost esimate. Shannon & Wilson has prepared this document in a professional manner, using that level of skill and care normally exercised for similar projects under similar conditions by reputable and competent environmental consultants currently practicing in the area. The costs and remedial approach presented herein are based on limited research and sampling at the site, and should be considered estimates representative at the time of our observations. Other areas of contamination that were not obvious during previous site work could be present at the site and could affect the costs presented herein. Shannon & Wilson is not responsible for facts that were concealed, withheld, or not fully disclosed at the time the ESAs and cost estimate were prepared. We also note that the facts and conditions referenced in this cost estimate may change over time, and the statement set forth here are described as of the date of issuance of this document. Conclusions and recommendations were made within the operative constraints of the scope, budget, and schedule for this project. We believe that the cost estimate presented here provides realistic remedial costs that could be incurred in the purchase of this property, but no guarantee is made or implied. Opinions expressed herein are based on our understanding and interpretation of current regulatory standards and should not be construed as legal opinions. We anticipate that Ecology would agree to the conceptual remedial action presented here. However, Ecology has not been contacted to substantiate this opinion. Further, regulatory evaluation criteria are constantly 21-1-16700-302-R1f.docx/evp 21-1-16700-302 12 8.0 REFERENCES Shannon & Wilson, Inc., 2018, Draft Phase II environmental site assessment, Sound Transit Right-of-Way #RTN001 through RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington: Report prepared by Shannon & Wilson, Seattle, Wash., for Sound Transit, Seattle, Wash., 21-1-16432-281, March 2. Washington State Department of Ecology (Ecology), 1992, Statistical Guidance for Ecology Site Managers: Olympia, Wash, Washington State Department of Ecology, Toxics Cleanup Program, Publication no. 92-54, August. Washington State Department of Ecology (Ecology), 2013, Model toxics control act regulation and statute: MTCA cleanup regulation, chapter 173-340 WAC; model toxics control act, chapter 70.105D RCW; uniform environmental covenants act, chapter 64.70 RCW (rev.): Olympia, Wash., Washington Dept. of Ecology, Publication no. 94.06, 324 p., available:https://fortress.wa.gov/ecy/publications/SummaryPages/9406.html TABLE 1 COST ESTIMATE SUMMARY SHANNON & WILSON, INC. Best-Case Cleanup Scenario Pre-Construction Planning and Remedial Investigation/Feasibility Study $60,000 RTN001 Excavation $387,360 RTN002 Biostimulation Injection (45-foot by 55-foot) $53,509 Groundwater Monitoring Network Installation (8 wells) $14,680 Quarterly Groundwater Monitoring (8 wells for 2 years) $85,440 East Parking, West Parking, Southeast Corner Shallow Spot Excavation $54,185 Construction Report, Site Closure Report and Regulatory Interaction $16,699 TOTAL LABOR HOURS AND COST $671,873 Worst-Case Cleanup Scenario Pre-Construction Planning and Remedial Investigation/Feasibility Study $65,000 RTN001 Excavation and Biostimulation Application $1,633,410 RTN001 Biostimulation Compound Injections (3 events) $594,212 RTN002 Biostimulation Injection (75-foot by 120-foot) $173,889 Groundwater Monitoring Network Installation (12 wells) $21,840 Quarterly Groundwater Monitoring (12 wells for 3 years) $143,640 East Parking, West Parking, Southeast Corner Shallow Spot Excavation $84,877 Construction Report, Site Closure Report and Regulatory Interaction $24,841 TOTAL LABOR HOURS AND COST $2,741,709 Probable Cleanup Scenario Pre-Construction Planning and Remedial Investigation/Feasibility Study $62,000 RTN001 Excavation and Biostimulation Application $747,594 RTN001 Biostimulation Compound Injections (1 event) $198,071 RTN002 Biostimulation Injection (50-foot by 75-foot) $78,454 Groundwater Monitoring Network Installation (10 wells) $16,680 Quarterly Groundwater Monitoring (12 wells for 3 years) $88,400 East Parking, West Parking, Southeast Corner Shallow Spot Excavation $67,731 Construction Report, Site Closure Report and Regulatory Interaction $19,599 TOTAL LABOR HOURS AND COST $1,278,529 Note: See Tables 2, 3, and 4 for detailed cost estimates. Description Cost Description Cost Description Cost 21-1-16700-302-R1f-T1.xlsx/wp/lkn 21-1-16700-302 TABLE 2 BEST-CASE SCENARIO REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. Pre-Construction Planning Rate Quantity Subtotal Subtotal Labor - RI/FS and Project Pre-Construction Planning Consultant Labor $60,000.00 /ea 1 ea $60,000.00 Labor - RI/FS and Pre-Construction Planning $60,000.00 Pre-Construction Planning Subtotal $60,000 RTN001 Excavation Rate Quantity Subtotal Subtotal Oversight - RTN001 Remedial Excavation Activities Consultant Labor and Expenses $2,400.00 /day 5 days $12,000.00 Oversight - RTN001 Remedial Excavation Activities Subtotal $12,000.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation RCRA-8 metals (soil) $75.00 /ea 10 samples $750.00 TPH-Dx $75.00 /ea 22 samples $1,650.00 Laboratory Analysis - RTN001 Soil Sampling for Disposal Characterization and Confirmation Subtotal $2,400.00 Contractor Cost - RTN001 Excavation Private Utility Locator Services $90.00 /hr 4 hrs $360.00 Contractor Mobilization $5,000 /ea 1 ea $5,000.00 Dewatering System $9 /sf 4500 sf $40,500.00 Excavation Services $14 /ton 2750 tons $38,500.00 Contaminated Soil Transportation Disposal $75.00 /ton 2750 tons $206,250.00 Backfill Filling and Compaction $45.00 /yd3 1830 yd 3 $82,350.00 Contractor Cost - RTN001 Excavation Subtotal $372,960.00 RTN001 Excavation Subtotal $387,360.00 RTN002 Biostimulation Compound Injection (45- foot by 55-foot) Rate Quantity Subtotal Subtotal Oversight - Biostimulation Compound Application Consultant Labor and Expenses $2,400.00 /day 4 /days $9,600.00 Oversight - Biostimulation Compound Application Subtotal $9,600.00 Contractor Costs - Biostimulation Compound Materials Biostimulation Compound Materials $8.95 /lb 2,230 lbs $19,958.50 Contractor Costs - Biostimulation Compound Materials Subtotal $19,958.50 Contractor Costs - Drilling and Compound Application Contractor Drilling and Application Contractor $23,950.20 Contractor Costs - Drilling and Compound Application Contractor Subtotal $23,950.20 Biostimulation Compound Application Subtotal $53,509 120% of product costs 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 1 of 3 21-1-16700-302 TABLE 2 BEST-CASE SCENARIO REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. Groundwater Monitoring Network Installation (8 Wells) Rate Quantity Subtotal Subtotal Oversight - Monitoring Well Installation Observation Consultant Labor and Expenses $2,400.00 /day 2 days $4,800.00 Oversight - Monitoring Well Installation Observation Subtotal $4,800.00 Contractor Costs Monitoring Well Installation Private Utility Locator Services $90.00 /hr 4 hrs $360.00 Drill Rig Mobilization $500 /day 2 days $1,000.00 Well Installation $1,000 /unit 8 units $8,000.00 IDW Disposal $260 /drum 2 drums $520.00 Contractor Costs Monitoring Well Installation Subtotal $9,880.00 Groundwater Monitoring Network Installation Subtotal $14,680.00 Quarterly Groundwater Monitoring (8 Wells for 2 Years) Rate Quantity Subtotal Subtotal Labor and Expenses- Groundwater Sampling Consultant Labor and Expenses $5,600.00 /quarter 8 quarters $44,800.00 Groundwater Sampling Subtotal $44,800.00 Laboratory Analysis - Groundwater Sampling TPH-Dx $75.00 /ea 64 samples $4,800.00 RCRA 8 Metals $110.00 /ea 64 samples $7,040.00 Laboratory Analysis - Groundwater Sampling Subtotal $11,840.00 Vendor Cost - IDW Disposal IDW Disposal $550 /ea 16 ea $8,800.00 Vendor Cost - IDW Disposal Subtotal $8,800.00 Labor - Quarterly Groundwater Monitoring Reporting Quarterly Report $2,500.00 /ea 8 ea $20,000.00 Labor - Reporting Subtotal $20,000.00 Quarterly Groundwater Monitoring 2 Years Subtotal $85,440.00 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 2 of 3 21-1-16700-302 TABLE 2 BEST-CASE SCENARIO REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. East Parking, West Parking, Southeast Corner Shallow Spot Excavation Rate Quantity Subtotal Subtotal Oversight - Remedial Excavation Activities Consultant Labor and Expenses $2,400.00 /day 2 days $4,800.00 Oversight - Remedial Excavation Activities Subtotal $4,800.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation RCRA 8 Metals $75.00 /ea 5 samples $375.00 TPH-Dx $75.00 /ea 15 samples $1,125.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation Subtotal $1,500.00 Contractor Cost - Excavation Private Utility Locator Services $90.00 /hr 4 hrs $360.00 Excavation Services $14 /ton 400 tons $5,600.00 Contaminated Soil Transportation Disposal $75.00 /ton 400 tons $30,000.00 Backfill Filling and Compaction $45.00 /yd3 265 yd 3 $11,925.00 Contractor Cost - Excavation Subtotal $47,885.00 East Parking, West Parking, Southeast Corner Surface Excavations Subtotal $54,185.00 Construction Report, Site Closure Report and Regulatory Interaction Rate Quantity Subtotal Subtotal Labor - Reporting Vice President $250.00 /hr 6 hrs $1,500.00 Associate $175.00 /hr 10 hrs $1,750.00 Professional Engineer/Geologist III $105.00 /hr 60 hrs $6,300.00 Drafting $68.00 /hr 12 hrs $816.00 Administrative $64.00 /hr 6 hrs $384.00 Reproduction $64.00 /hr 6 hrs $384.00 Other Direct Costs Copies $0.05 /page 300 $15.00 Labor - Reporting Subtotal $11,149.00 Labor - Regulatory Agency Interaction/Meetings Vice President $250.00 /hr 2 hrs $500.00 Associate $175.00 /hr 6 hrs $1,050.00 $4,000.00 /unit 1 unit $4,000.00 Labor - Regulatory Agency Interaction/Meetings Subtotal $5,550.00 Site Closure Report Subtotal $16,699.00 TOTAL ESTIMATED ENVIRONMENTAL SERVICES COST $671,872.70 Notes: Washington State Department of Ecology See Report Section 7.0 for Full List of Assumptions. Dx = diesel; ea = each; hr = hour; IDW = investigation-derived waste; lb = pound; RI/FS = Remedial Investigation/Feasibility Study; RCRA = Resource Conservation and Recovery Act; sf = square foot; TPH = total petroleum hydrocarbons; yd3 = cubic yard 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 3 of 3 21-1-16700-302 TABLE 3 PROBABLE REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. Pre-Construction Planning Rate Quantity Subtotal Subtotal Labor - Project Pre-Construction Planning and RI/FS Consultant Labor $62,000.00 /ea 1 ea $62,000.00 Labor - Pre-Construction Planning and RI/FS $62,000.00 Pre-Construction Planning Subtotal $62,000 RTN001 Excavation and Biostimulation Application Rate Quantity Subtotal Subtotal Oversight - RTN001 Remedial Excavation Activities Consultant Labor and Expenses $2,400.00 /day 8 days $19,200.00 Oversight - Remedial Excavation Activities Subtotal $19,200.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation RCRA-8 metals (soil) $75.00 /ea 12 samples $900.00 TPH-Dx $75.00 /ea 36 samples $2,700.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation Subtotal $3,600.00 Contractor Cost - RTN001 Excavation and Biostimulation Application Private Utility Locator Services $90.00 /hr 5 hrs $450.00 Contractor Mobilization $5,000 /ea 1 ea $5,000.00 Hydraulic fluid reservoir removal $3,000 ea 2 ea $6,000.00 Dewatering System $9 /sf 8100 sf $72,900.00 Excavation Services $14 /ton 4950 tons $69,300.00 Contaminated Soil Transportation Disposal $75.00 /ton 4950 tons $371,250.00 Backfill Filling and Compaction $45.00 /yd3 3300 yd 3 $148,500.00 Contractor Cost - Excavation Subtotal $673,400.00 Contractor Costs - Biostimulation Compound Materials Biostimulation Compound Materials $2.35 /lb 21,870 lbs $51,394.50 Contractor Cost - Biostimulation Compound Materials Subtotal $51,394.50 RTN001 Excavation Subtotal $747,594.50 RTN001 Biostimulation Compound Injections (1 event) Rate Quantity Subtotal Subtotal Oversight - Biostimulation Compound Application Consultant Labor and Expenses $2,400.00 /day 5 days $12,000.00 Oversight - Biostimulation Compound Application Subtotal $12,000.00 Contractor Costs - Biostimulation Compound Materials Biostimulation Compound Materials $8.95 /lb 9,450 lbs $84,577.50 Contractor Costs - Biostimulation Compound Materials Subtotal $84,577.50 Contractor Costs - Drilling and Compound Application Contractor Drilling and Application Contractor $101,493.00 Contractor Costs - Drilling and Compound Application Contractor Subtotal $101,493.00 RTN002 Biostimulation Compound Injection Subtotal $198,071 120% of product costs 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 1 of 3 21-1-16700-302 TABLE 3 PROBABLE REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. RTN002 Biostimulation Compound Injection (50-foot by 75-foot) Rate Quantity Subtotal Subtotal Oversight - Biostimulation Compound Application Consultant Labor and Expenses $2,400.00 /day 5 days $12,000.00 Oversight - Biostimulation Compound Application Subtotal $12,000.00 Contractor Costs - Biostimulation Compound Materials $8.95 /lb 3,375 lbs $30,206.25 Contractor Costs - Biostimulation Compound Materials Subtotal $30,206.25 Contractor Costs - Drilling and Compound Application Contractor Drilling and Application Contractor $36,247.50 Contractor Costs - Drilling and Compound Application Contractor Subtotal $36,247.50 RTN002 Biostimulation Compound Injection Subtotal $78,454 Groundwater Monitoring Network Installation (10 Wells) Rate Quantity Subtotal Subtotal Oversight - Monitoring Well Installation Observation Consultant Labor and Expenses $2,400.00 /day 2 days $4,800.00 Oversight - Monitoring Well Installation Observation Subtotal $4,800.00 Contractor Costs Monitoring Well Installation Private Utility Locator Services $90.00 /hr 4 hrs $360.00 Drill Rig Mobilization $500 /day 2 days $1,000.00 Well Installation $1,000 /unit 10 units $10,000.00 IDW Disposal $260 /drum 2 drums $520.00 Contractor Costs Monitoring Well Installation Subtotal $11,880.00 Groundwater Monitoring Network Installation Subtotal $16,680.00 Quarterly Groundwater Monitoring (10 Wells for 2 Years) Rate Quantity Subtotal Subtotal Labor - Groundwater Sampling Consultant Labor $5,600.00 /quarter 8 quarters $44,800.00 Groundwater Sampling Subtotal $44,800.00 Laboratory Analysis - Groundwater Sampling TPH-Dx $75.00 /ea 80 samples $6,000.00 RCRA 8 Metals $110.00 /ea 80 samples $8,800.00 Laboratory Analysis - Groundwater Sampling Subtotal $14,800.00 Vendor Cost - IDW Disposal IDW Disposal $550 /ea 16 ea $8,800.00 Vendor Cost - IDW Disposal Subtotal $8,800.00 Labor - Quarterly Groundwater Monitoring Reporting Quarterly Report $2,500.00 /ea 8 ea $20,000.00 Labor - Reporting Subtotal $20,000.00 Quarterly Groundwater Monitoring 2 Years Subtotal $88,400.00 120% of product costs Biostimulation Compound Materials 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 2 of 3 21-1-16700-302 TABLE 3 PROBABLE REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. East Parking, West Parking, Southeast Corner Shallow Hotspot Excavation Rate Quantity Subtotal Subtotal Oversight - Hotspot Excavation Activities Consultant Labor and Expenses $2,400.00 /day 2 days $4,800.00 Oversight - Remedial Excavation Activities Subtotal $4,800.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation RCRA 8 Metals $75.00 /ea 5 samples $375.00 TPH-Dx $75.00 /ea 15 samples $1,125.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation Subtotal $1,500.00 Contractor Cost -Hotspot Excavation Private Utility Locator Services $90.00 /hr 4 hrs $360.00 Excavation Services $14 /ton 400 tons $5,600.00 Contaminated Soil Transportation Disposal $75.00 /ton 400 tons $30,000.00 Backfill Filling and Compaction $45.00 /yd3 265 yd 3 $11,925.00 Contractor Cost - Excavation Subtotal $47,885.00 Additional Hotspots Found During Construction Excavating discovered hotspots 25% of known hotspot cost $13,546.25 Additional Hotspots Found During Construction Subtotal $13,546.25 East Parking, West Parking, Southeast Corner Surface Excavations Subtotal $67,731.25 Construction Report, Site Closure Report and Regulatory Interaction Rate Quantity Subtotal Subtotal Labor - Reporting Vice President $250.00 /hr 6 hrs $1,500.00 Associate $175.00 /hr 10 hrs $1,750.00 Professiona Eng/Geo III $105.00 /hr 70 hrs $7,350.00 Drafting $68.00 /hr 12 hrs $816.00 Administrative $64.00 /hr 6 hrs $384.00 Reproduction $64.00 /hr 6 hrs $384.00 Other Direct Costs Copies $0.05 /page 300 $15.00 Labor - Reporting Subtotal $12,199.00 Labor - Regulatory Agency Interaction/Meetings Vice President $250.00 /hr 4 hrs $1,000.00 Associate $175.00 /hr 8 hrs $1,400.00 $5,000.00 /unit 1 unit $5,000.00 Labor - Regulatory Agency Interaction/Meetings Subtotal $7,400.00 Site Closure Report Subtotal $19,599.00 TOTAL ESTIMATED ENVIRONMENTAL SERVICES COST $1,278,529.00 Notes: Dx = diesel; ea = each; hr = hour; IDW = investigation-derived waste; lb = pound; RI/FS = Remedial Investigation/Feasibility Study; RCRA = Resource Conservation and Recovery Act; sf = square foot; TPH = total petroleum hydrocarbons; yd3 = cubic yard Washington State Department of Ecology See Report Section 7.0 for Full List of Assumptions. 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 3 of 3 21-1-16700-302 TABLE 4 WORST-CASE SCENARIO REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. Pre-Construction Planning Rate Quantity Subtotal Subtotal Labor - Project Pre-Construction Planning and RI/FS Consultant Labor $65,000.00 /ea 1 ea $65,000.00 Labor - Pre-Construction Planning and RI/FS $65,000.00 Pre-Construction Planning Subtotal $65,000 RTN001 Excavation and Biostimulation Application Rate Quantity Subtotal Subtotal Oversight - RTN001 Remedial Excavation Activities Consultant Labor and Expenses $2,400.00 /day 10 days $24,000.00 Oversight - Remedial Excavation Activities Subtotal $24,000.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation RCRA-8 metals (soil) $75.00 /ea 20 samples $1,500.00 TPH-Dx $75.00 /ea 72 samples $5,400.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation Subtotal $6,900.00 Contractor Cost - RTN001 Excavation and Biostimulation Application Private Utility Locator Services $90.00 /hr 5 hrs $450.00 Contractor Mobilization $5,000 /ea 1 ea $5,000.00 Hydraulic fluid reservoir removal $3,000 ea 4 ea $12,000.00 Dewatering System $9 /sf 18000 sf $162,000.00 Excavation Services $14 /ton 11000 tons $154,000.00 Contaminated Soil Transportation Disposal $75.00 /ton 11000 tons $825,000.00 Backfill Filling and Compaction $45.00 /yd3 7330 yd 3 $329,850.00 Contractor Cost - Excavation Subtotal $1,488,300.00 Contractor Costs - Biostimulation Compound Materials Biostimulation Compound Materials $2.35 /lb 48,600 lbs $114,210.00 Contractor Cost - Biostimulation Compound Materials Subtotal $114,210.00 RTN001 Excavation Subtotal $1,633,410.00 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 1 of 4 21-1-16700-302 TABLE 4 WORST-CASE SCENARIO REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. RTN001 Biostimulation Compound Injections (3 Events) Rate Quantity Subtotal Subtotal Oversight - Biostimulation Compound Application Consultant Labor and Expenses $2,400.00 /day 15 days $36,000.00 Oversight - Biostimulation Compound Application Subtotal $36,000.00 Contractor Costs - Biostimulation Compound Materials Biostimulation Compound Materials $8.95 /lb 28,350 lbs $253,732.50 Contractor Costs - Biostimulation Compound Materials Subtotal $253,732.50 Contractor Costs - Drilling and Compound Application Contractor Drilling and Application Contractor $304,479.00 Contractor Costs - Drilling and Compound Application Contractor Subtotal $304,479.00 RTN002 Biostimulation Compound Injection Subtotal $594,212 RTN002 Biostimulation Compound Injection (75-foot by 120-foot) Rate Quantity Subtotal Subtotal Oversight - Biostimulation Compound Application Consultant Labor and Expenses $2,400.00 /day 6 days $14,400.00 Oversight - Biostimulation Compound Application Subtotal $14,400.00 Contractor Costs - Biostimulation Compound Materials $8.95 /lb 8,100 lbs $72,495.00 Contractor Costs - Biostimulation Compound Materials Subtotal $72,495.00 Contractor Costs - Drilling and Compound Application Contractor Drilling and Application Contractor $86,994.00 Contractor Costs - Drilling and Compound Application Contractor Subtotal $86,994.00 RTN002 Biostimulation Compound Injection Subtotal $173,889 Groundwater Monitoring Network Installation (12 Wells) Rate Quantity Subtotal Subtotal Oversight - Monitoring Well Installation Observation Consultant Labor and Expenses $2,400.00 /day 3 days $7,200.00 Oversight - Monitoring Well Installation Observation Subtotal $7,200.00 Contractor Costs Monitoring Well Installation Private Utility Locator Services $90.00 /hr 4 hrs $360.00 Drill Rig Mobilization $500 /day 3 days $1,500.00 Well Installation $1,000 /unit 12 units $12,000.00 IDW Disposal $260 /drum 3 drums $780.00 Contractor Costs Monitoring Well Installation Subtotal $14,640.00 Groundwater Monitoring Network Installation Subtotal $21,840.00 120% of product costs Biostimulation Compound Materials 120% of product costs 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 2 of 4 21-1-16700-302 TABLE 4 WORST-CASE SCENARIO REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. Quarterly Groundwater Monitoring (12 Wells for 3 Years) Rate Quantity Subtotal Subtotal Labor - Groundwater Sampling Consultant Labor and Expenses $5,600.00 /quarter 12 quarters $67,200.00 Groundwater Sampling Subtotal $67,200.00 Laboratory Analysis - Groundwater Sampling TPH-Dx $75.00 /ea 144 samples $10,800.00 RCRA 8 Metals $110.00 /ea 144 samples $15,840.00 Laboratory Analysis - Groundwater Sampling Subtotal $26,640.00 Vendor Cost - IDW Disposal IDW Disposal $550 /ea 36 each $19,800.00 Vendor Cost - IDW Disposal Subtotal $19,800.00 Labor - Quarterly Groundwater Monitoring Reporting Quarterly Report $2,500.00 /ea 12 each $30,000.00 Labor - Reporting Subtotal $30,000.00 Quarterly Groundwater Monitoring 2 Years Subtotal $143,640.00 East Parking, West Parking, Southeast Corner Shallow Hotspot Excavation Rate Quantity Subtotal Subtotal Oversight - Hotspot Excavation Activities Consultant Labor and Expenses $2,400.00 /day 3 days $7,200.00 Oversight - Remedial Excavation Activities Subtotal $7,200.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation RCRA 8 Metals $75.00 /ea 5 samples $375.00 TPH-Dx $75.00 /ea 15 samples $1,125.00 Laboratory Analysis - Soil Sampling for Disposal Characterization and Confirmation Subtotal $1,500.00 Contractor Cost -Hotspot Excavation Private Utility Locator Services $90.00 /hr 4 hrs $360.00 Excavation Services $14 /ton 400 tons $5,600.00 Contaminated Soil Transportation Disposal $75.00 /ton 400 tons $30,000.00 Backfill Filling and Compaction $45.00 /yd3 265 yd 3 $11,925.00 Contractor Cost - Excavation Subtotal $47,885.00 Additional Hotspots Found During Construction Excavating discovered hotspots 50% of known hotspot cost $28,292.50 Additional Hotspots Found During Construction Subtotal $28,292.50 East Parking, West Parking, Southeast Corner Surface Excavations Subtotal $84,877.50 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 3 of 4 21-1-16700-302 TABLE 4 WORST-CASE SCENARIO REMEDIAL COST ESTIMATE SHANNON & WILSON, INC. Construction Report, Site Closure Report and Regulatory Interaction Rate Quantity Subtotal Subtotal Labor - Reporting Vice President $250.00 /hr 8 hrs $2,000.00 Associate $175.00 /hr 12 hrs $2,100.00 Professiona Eng/Geo III $105.00 /hr 100 hrs $10,500.00 Drafting $68.00 /hr 14 hrs $952.00 Administrative $64.00 /hr 8 hrs $512.00 Reproduction $64.00 /hr 8 hrs $512.00 Other Direct Costs Copies $0.05 /page 300 $15.00 Labor - Reporting Subtotal $16,591.00 Labor - Regulatory Agency Interaction/Meetings Vice President $250.00 /hr 6 hrs $1,500.00 Associate $175.00 /hr 10 hrs $1,750.00 $5,000.00 /unit 1 unit $5,000.00 Labor - Regulatory Agency Interaction/Meetings Subtotal $8,250.00 Site Closure Report Subtotal $24,841.00 TOTAL ESTIMATED ENVIRONMENTAL SERVICES COST $2,741,709.00 Notes: Dx = diesel; ea = each; hr = hour; IDW = investigation-derived waste; lb = pound; RI/FS = Remedial Investigation/ Feasibility Study; RCRA = Resource Conservation and Recovery Act; sf = square foot; TPH = total petroleum hydrocarbons; yd3 = cubic yard Washington State Department of Ecology See Report Section 7.0 for Full List of Assumptions. 21-1-16700-302-R1f-T2-T3-T4.xlsx/wp/lkn Page 4 of 4 21-1-16700-302 PROJECT LOCATION 167 405 Railroad Rainier Avenue SS Grady Wa y Renton S 3rd Street900 LakeAvenue SAvenue SSh a t t u c k S 7th Street 515 Benson Drive SLLVICINITY MAP Bing Map Image adapted from aerial imagery provided by Autodesk Live Maps and Microsoft Bing Maps reprinted with permission from Microsoft Corporation. NOTE March 2018 21-1-16700-302 Filename: J:\211\16700\302\21-1-16700-302 Vic Map.dwg Date: 03-12-2018 Login: jrsWashingtonProjectLocation 90 5 Remedial Cost Estimate Sound Transit ROW #RTN001 Through RTN004 Renton, Washington 0 1,000 2,000 Approximate Scale in Feet FIG. 1 Seattle RTN001Rainier Avenue SLake Avenue S RTN002RTN003RTN001-1RTN001-2RTN001-4RTN001-5RTN001-6RTN001-7RTN001-8RTN001-9RTN001-10RTN001-11RTN004-1RTN002-3RTN004APPROXIMATE REMEDIALEXCAVATION LOCATIONS060 120Approximate Scale in FeetFilename: J:\211\16700\302\21-1-16700-302 Site - Soils.dwg Layout: Figure 2 Date: 03-12-2018 Login: jrsMarch 2018Approximate Probe LocationWorst-Case Scenario ExcavationBest-Case Scenario ExcavationProbable Scenario ExcavationLEGENDRTN001-11SOIL CONTAMINANTS EXPLANATIONVOCsPCBsDiesel and lube oil-rangepetroleum hydrocarbonscPAHsCarcinogenic Polycyclic Aromatic HydrocarbonsVolatile Organic HydrocarbonsModel Toxics Control ActPolychlorinated BiphenylscPAHsVOCsMTCAPCBsDetected Above MTCADetected Below MTCA, but Abovethe Laboratory Reporting LimitNot Analyzed or Detected Abovethe Laboratory Reporting LimitNOTES1. Exceedances noted are for soil concentrations greater thanthe MTCA Method A cleanup criteria: 2,000 mg/kg forDiesel/Lube Oil, 0.10 mg/kg for cPAHs, and 1 mg/kg for PCBs.2. MTCA cleanup criteria for VOCs vary; refer to Phase II.3. MTCA-5/RCRA-8 Metals were detected in each of the soilsamples analyzed below the applicable MTCA cleanup criteria.FIG. 221-1-16700-302Remedial Cost EstimateSound Transit ROW #RTN001 Through RTN004Renton, WashingtonBing Map Image adapted from aerial imagery providedby Autodesk Live Maps and Microsoft Bing Mapsreprinted with permission from Microsoft Corporation. RTN001Rainier Avenue SLake Avenue S RTN002RTN004RTN003RTN001-1RTN001-2RTN001-4RTN001-5RTN001-6RTN001-7RTN001-8RTN001-9RTN001-10RTN001-11RTN001-3RTN003-2RTN002-1RTN002-2RTN002-3RTN002-4BIOSTIMULATION COMPOUNDAPPLICATION LOCATIONSBing Map Image adapted from aerial imagery providedby Autodesk Live Maps and Microsoft Bing Mapsreprinted with permission from Microsoft Corporation.0100 200Approximate Scale in FeetFilename: J:\211\16700\302\21-1-16700-302 Site - GW.dwg Layout: Figure 3 Date: 03-12-2018 Login: jrsMarch 2018Approximate Probe LocationWorst-Case BiostimulationCompound Mixing AreaWorst-Case BiostimulationCompound Injection AreaProbable-Case BiostimulationCompound Mixing AreaProbable-Case BiostimulationCompound Injection AreaBest-Case BiostimulationCompound Injection AreaLEGENDRTN001-11GROUNDWATER CONTAMINANTS EXPLANATIONVOCsDissolved MetalsDiesel and lube oil-rangepetroleum hydrocarbonsVolatile Organic HydrocarbonsModel Toxics Control ActVOCsMTCADetected Above MTCADetected Below MTCA, but Abovethe Laboratory Reporting LimitNot Analyzed or Detected Abovethe Laboratory Reporting Limit NOTES1. Exceedances noted are for groundwaterconcentrations greater than the MTCA Method Acleanup criteria: 500 μg/L for Diesel/Lube Oil.2. MTCA cleanup criteria for VOCs and metals vary;refer to Phase II.FIG. 321-1-16700-302Remedial Cost EstimateSound Transit ROW #RTN001 Through RTN004Renton, Washington 21-1-16700-302 APPENDIX IMPORTANT INFORMATION ABOUT YOUR ENVIRONMENTAL SITE ASSESSMENT/EVALUATION REPORT Page 1 of 2 1/2018 SHANNON & WILSON, INC. Geotechnical and Environmental Consultants Dated: Attachment to and part of Report 21-1-16700-302 Date: March 12, 2018 To: Mr. Mark Menard Sound Transit IMPORTANT INFORMATION ABOUT YOUR ENVIRONMENTAL SITE ASSESSMENT/EVALUATION REPORT ENVIRONMENTAL SITE ASSESSMENTS/EVALUATIONS ARE PERFORMED FOR SPECIFIC PURPOSES AND FOR SPECIFIC CLIENTS. This report was prepared to meet the needs you specified with respect to your specific site and your risk management preferences. Unless indicated otherwise, we prepared your report expressly for you and for the purposes you indicated. No one other than you should use this report for any purpose without first conferring with us. No one is authorized to use this report for any purpose other than that originally contemplated without our prior written consent. The findings and conclusions documented in this site assessment/evaluation have been prepared for specific application to this project and have been developed in a manner consistent with that level of care and skill normally exercised by members of the environmental science profession currently practicing under similar conditions in this area. The conclusions presented are based on interpretation of information currently available to us and are made within the operational scope, budget, and schedule constraints of this project. No warranty, express or implied, is made. OUR REPORT IS BASED ON PROJECT-SPECIFIC FACTORS. Our environmental site assessment is based on several factors and may include (but not be limited to): reviewing public documents to chronicle site ownership for the past 30, 40, or more years; investigating the site's regulatory history to learn about permits granted or citations issued; determining prior uses of the site and those adjacent to it; reviewing available topographic and real estate maps, historical aerial photos, geologic information, and hydrologic data; reviewing readily available published information about surface and subsurface conditions; reviewing federal and state lists of known and potentially contaminated sites; evaluating the potential for naturally occurring hazards; and interviewing public officials, owners/operators, and/or adjacent owners with respect to local concerns and environmental conditions. Except as noted within the text of the report, no sampling or quantitative laboratory testing was performed by us as part of this site assessment. Where such analyses were conducted by an outside laboratory, Shannon & Wilson relied upon the data provided and did not conduct an independent evaluation regarding the reliability of the data. CONDITIONS CAN CHANGE. Site conditions, both surface and subsurface, may be affected as a result of natural processes or human influence. An environmental site assessment/evaluation is based on conditions that existed at the time of the evaluation. Because so many aspects of a historical review rely on third party information, most consultants will refuse to certify (warrant) that a site is free of contaminants, as it is impossible to know with absolute certainty if such a condition exists. Contaminants may be present in areas that were not surveyed or sampled, or may migrate to areas that showed no signs of contamination at the time they were studied. Unless your consultant indicates otherwise, your report should not be construed to represent geotechnical subsurface conditions at or adjacent to the site and does not provide sufficient information for construction-related activities. Your report also should not be used following floods, earthquakes, or other acts of nature; if the size or configuration of the site is altered; if the location of the site is modified; or if there is a change of ownership and/or use of the property. INCIDENTAL DAMAGE MAY OCCUR DURING SAMPLING ACTIVITIES. Incidental damage to a facility may occur during sampling activities. Asbestos and lead-based paint sampling often require destructive sampling of pipe insulation, floor tile, walls, doors, ceiling tile, roofing, and other building materials. Shannon & Wilson does not provide for paint repair. Limited repair of asbestos sample locations are provided. However, Shannon & Wilson neither warranties repairs made by our field personnel, nor are we held liable for injuries or damages as a result of those repairs. If you desire a specific form of repair, such as those provided by a licensed roofing contractor, you need to request the specific repair at the time of the proposal. The owner is responsible for repair methods that are not specified in the proposal. Page 2 of 2 1/2018 READ RESPONSIBILITY CLAUSES CAREFULLY. Environmental site assessments/evaluations are less exact than other design disciplines because they are based extensively on judgment and opinion, and there may not have been any (or very limited) investigation of actual subsurface conditions. Wholly unwarranted claims have been lodged against consultants. To limit this exposure, consultants have developed a number of clauses for use in their contracts, reports, and other documents. These responsibility clauses are not exculpatory clauses designed to transfer the consultant's liabilities to other parties; rather, they are definitive clauses that identify where responsibilities begin and end. Their use helps all parties involved recognize their individual responsibilities and take appropriate action. Some of these definitive clauses may appear in this report, and you are encouraged to read them closely. Your consultant will be pleased to give full and frank answers to your questions. Consultants cannot accept responsibility for problems that may develop if they are not consulted after factors considered in their reports have changed, or conditions at the site have changed. Therefore, it is incumbent upon you to notify your consultant of any factors that may have changed prior to submission of the final assessment/evaluation. An assessment/evaluation of a site helps reduce your risk, but does not eliminate it. Even the most rigorous professional assessment may fail to identify all existing conditions. ONE OF THE OBLIGATIONS OF YOUR CONSULTANT IS TO PROTECT THE SAFETY, HEALTH, PROPERTY, AND WELFARE OF THE PUBLIC. If our environmental site assessment/evaluation discloses the existence of conditions that may endanger the safety, health, property, or welfare of the public, we may be obligated under rules of professional conduct, statutory law, or common law to notify you and others of these conditions. The preceding paragraphs are based on information provided by the ASFE/Association of Engineering Firms Practicing in the Geosciences, Silver Spring, Maryland SUBMITTED TO: Miller Nash Graham & Dunn LLP 2801 Alaskan Way, Suite 300 Seattle, WA 98121 BY: Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 (206) 632-8020 www.shannonwilson.com SUPPLEMENTAL ENVIRONMENTAL SITE ASSESSMENT Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) RENTON, WASHINGTON June 28, 2019 Shannon & Wilson No: 102225-001 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 ii EXECUTIVE SUMMARY Shannon & Wilson has completed a supplemental Environmental Site Assessment (ESA) at Sound Transit Right-of-Way Numbers RTN001 through RTN004, located at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington (the Site). This study was conducted with the understanding that Sound Transit plans to acquire the parcels as part of the Interstate Highway 405 (I-405) Bus Rapid Transit project. To further evaluate the nature and extent of the previously identified environmental impacts at the Site, a hollow-stem auger was advanced at select locations for the installation of seven new groundwater monitoring wells (MW-1 through MW-7). During this supplemental ESA, 10 soil samples and 7 groundwater samples were collected and analyzed for previously identified potential contaminants of concern, including petroleum hydrocarbons, volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), and arsenic (groundwater samples only). Based on data collected during the supplemental ESA and an evaluation of this data along with previous Phase II ESA data, we offer the following conclusions: Groundwater flow at the site is predominately to the west; however, a southerly groundwater flow component exists near the westernmost portion of the Site. There was no evidence of free product observed in soil samples or measured during well gauging with an oil/water interface probe. If present, it is likely limited in extent. The contaminants of concern at the site are lube oil/diesel-range petroleum hydrocarbons in soil and groundwater. There were no Washington State Department of Ecology (Ecology) Model Toxics Control Act (MTCA) Method A or B soil exceedances for any chemical of concern analyzed for in soil samples collected during this supplemental ESA. A geochemical evaluation has been performed by plotting Eh and pH data collected from site groundwater monitoring wells along with the arsenic speciation/oxidation states. Based on site conditions, arsenic is not considered a potential contaminant of concern for the Site. Lube oil/diesel concentrations exceeded MTCA Method A cleanup levels in groundwater samples collected from MW-1 and MW-4. Lube oil/diesel groundwater concentrations were either non-detectable or below MTCA Method A cleanup levels in samples collected from MW-2, MW-3, MW-5, MW-6, and MW-7. These wells delineate the extent of the lube oil/diesel groundwater plume on RTN001 to the west, southwest, south, and southeast. The extent of RTN001 Service Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 iii Shop groundwater contamination appears to be limited to the footprint of the building. The source appears to be from somewhere within the building. The lube oil/diesel groundwater plume located in the northwest corner of RTN002 extends north, at least to MW-1, as samples collected from the well exceeded MTCA Method A cleanup levels. There is no known lube oil/diesel soil contamination associated with this groundwater plume. The extent and source of the RTN002 Body Shop groundwater contamination is not known, but is present under a portion of the building. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 ivCONTENTSCONTENTS 1 Introduction................................................................................................................................1 1.1 Authorization....................................................................................................................1 1.2 Objective............................................................................................................................1 2 Background.................................................................................................................................1 2.1 Site Location and Description.........................................................................................1 2.2 Previous Environmental Data........................................................................................2 2.2.1 Soil.........................................................................................................................2 2.2.2 Groundwater........................................................................................................2 3 Geologic and Hydrogeologic Setting......................................................................................2 3.1 Site Geology......................................................................................................................2 3.2 Site Hydrogeology...........................................................................................................3 4 Field Explorations......................................................................................................................4 4.1 Locations............................................................................................................................4 4.2 Soil and Groundwater Sampling...................................................................................4 4.3 Analytical Methods..........................................................................................................5 4.4 Analytical Results.............................................................................................................6 4.4.1 Soil Results ...........................................................................................................6 4.4.1.1 Petroleum Hydrocarbons......................................................................6 4.4.1.2 Volatile Organic Compounds (VOCs) and Polycyclic Aromatic Hydrocarbons (PAHs)..........................................................6 4.4.1.3 Total Organic Carbon ............................................................................6 4.4.2 Groundwater Results..........................................................................................6 4.4.2.1 Petroleum Hydrocarbons......................................................................7 4.4.2.2 Arsenic.....................................................................................................7 4.5 Investigation-Derived Waste (IDW)..............................................................................7 5 Discussion ...................................................................................................................................7 5.1 Groundwater Flow Direction.........................................................................................7 5.2 Diesel and Lube Oil Contamination..............................................................................8 5.3 Arsenic...............................................................................................................................9 6 Conclusions.................................................................................................................................9 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 vCONTENTS7 Limitations................................................................................................................................10 8 References .................................................................................................................................11 Tables Table 1: Sampling Summary Table 2: Monitoring Well Survey Data Table 3: Soil Results Summary (3 pages) Table 4: Groundwater Results Summary Figures Figure 1: Vicinity Map Figure 2: Well Map and Profile Locations Figure 3: Generalized Subsurface Profile A-A’ Figure 4: Generalized Subsurface Profile B-B’ Figure 5: Generalized Subsurface Profile C-C’ Figure 6: Potentiometric Surface Map Figure 7: Approximated Extents of Petroleum Hydrocarbon Figure 8: Approximated Extent of Dissolved Arsenic Figure 9: Arsenic Speciation Plot Appendices Appendix A: Field Methodology and Exploration Logs Appendix B: Groundwater Sampling Forms Appendix C: Redox ORP Reference Potentials Appendix D: Analytical Laboratory Reports Important Information Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 1 1INTRODUCTION 1.1 Authorization Shannon & Wilson completed a supplemental ESA for Miller Nash Graham & Dunn LLP at the Sound Ford location at 750 Rainier Avenue S. and 200 S. Grady Way in Renton, Washington (the Site). The supplemental ESA was conducted in general accordance with our proposal dated April 2, 2019. The task order was authorized by Mr. Jeffrey Beaver of Miller Nash Graham & Dunn LLP and Notice to Proceed was provided on April 8, 2019. This study was conducted to assist Sound Transit’s plans to acquire the Site as part of the I-405 Bus Rapid Transit project. 1.2 Objective The objective of this supplemental ESA was to further evaluate subsurface soil and groundwater conditions beneath the Site. Our scope of services included the following tasks: Groundwater monitoring well installation Groundwater elevation monitoring Soil and groundwater analytical laboratory analysis Preparation of this report. The scope of services was completed by installing seven new groundwater monitoring wells. The field effort was intended to better define the lateral and vertical extent of soil and/or groundwater contamination at the Site and, if appropriate, to subsequently revise the Remedial Cost Estimate provided previously (Shannon & Wilson, 2018b). 2BACKGROUND 2.1 Site Location and Description The Site is located in the northwest quarter of the northeast quarter of Section 19, Township 23 North, Range 5 East of the Willamette Meridian (Figure 1). The parcels that constitute the Site are shown in Figure 1 and have been described previously (Shannon & Wilson, 2017 and 2018a). Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 2 2.2 Previous Environmental Data Environmental data has previously been collected from the Site during the Phase II ESA (Shannon & Wilson, 2018a). Based on further review of the Phase II ESA data, the following environmental impacts were identified at the Site prior to initiation of supplemental ESA field activities. Some of this information is shown graphically in Figures 2 and 7. 2.2.1 Soil Lube oil/diesel-range petroleum hydrocarbon soil contamination underlies the northern end of the RTN001 Service Shop. It extends from shallow soil to the groundwater table. Lube oil/diesel-range petroleum hydrocarbon soil contamination also occurred as isolated “hot spots” on parcels RTN001, RTN002, and RTN004. These “hot spots” were characteristically confined to the vadose (unsaturated) zone and did not extend to the groundwater table. 2.2.2 Groundwater A lube oil/diesel-range petroleum hydrocarbon groundwater plume coincides with soil contamination underlying the northern end of the RTN001 Service Shop. The groundwater plume extends to the south and west of the detected soil contamination. Another lube oil/diesel-range petroleum hydrocarbon groundwater plume is located near the northwest corner of the RTN002 parcel. There is no known onsite soil contamination associated with the plume. Elevated dissolved arsenic concentrations are encountered in groundwater throughout a large portion of the Site. The arsenic plume is of relatively low and consistent concentrations and has no apparent source. 3 GEOLOGIC AND HYDROGEOLOGIC SETTING This section describes the general geologic setting of the Site vicinity and discusses the subsurface conditions. The geologic and hydrogeologic summaries below are based on a review of geologic documents and Shannon & Wilson’s environmental explorations conducted at the Site. 3.1 Site Geology Soil classification during the auger explorations was based on field observations alone. Soil descriptions are presented in the exploration logs in Appendix A. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 3 Subsurface conditions encountered during field investigation included fill underlain by fine-grained and sandy soils. Fill is generally 1 to 2 feet thick across most of the Site with the exception of the southeast corner where fill is 5 to 6 feet thick. Native soil units encountered at the Site are consistent with alluvium and low-energy lacustrine deposits of the Cedar River floodplain and the historic Lake Washington shoreline. These soil units consist of poorly graded sand and poorly graded sand with silt, silty sand; and silt with sand, silt, and organic clay. Peat and organic silt/clay were encountered in the southern end of the Site (beneath parcel RTN003). To illustrate the distribution and stratification of soil types observed at the Site, generalized subsurface profiles have been created for three transects as drawn in Figure 2. The subsurface generally has three native soil stratum: Silt/sandy silt (7.5 to 13 feet thick), underlain by: Poorly graded sand (1 to 2.5 feet thick), underlain by: Laminated silt with organics (bottom of stratum unknown) Generalized subsurface profiles A-A’, B-B’, and C-C’ are included as Figures 3, 4, and 5, respectively. The generalized subsurface profiles show the approximate location and distribution of the soil stratum, groundwater table, and positive field screening results of petroleum hydrocarbon presence (odor, sheen, or staining). The poorly graded sand stratum was saturated and is the most likely to transmit groundwater. The poorly graded sand aquifer is bound above and below by finer grained soils (silt, silt with sand, or sandy silt). 3.2 Site Hydrogeology Based on groundwater elevation monitoring conducted May 30, 2019, groundwater is approximately 6 to 8.5 feet below ground surface (bgs) or 20.2 to 18.5 feet above mean sea level. Water was predominately confined to the poorly graded sand unit encountered throughout most of the site. A potentiometric map of groundwater elevation and associated groundwater flow direction(s) has been included as Figure 6. Based on the May 2019 groundwater measurements, the primary flow direction across the site is to the west with an approximate hydraulic gradient of 0.003 to 0.008 foot per foot. However, towards the westernmost portion of the site, as monitored with MW-6, groundwater adopts more of a southerly flow direction. This refraction in flow direction may be associated with increased subsurface compaction near Rainier Avenue South. The increased compaction would decrease porosity and permeability of subsurface soils, potentially altering groundwater flow direction. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 4 4FIELD EXPLORATIONS 4.1 Locations Shannon & Wilson observed the advancement of seven hollow-stem auger borings for monitoring well installations on the Site from April 17 to 18 and from May 2 to 3, 2019. The purpose of each location, exploration, sampling depths, and selected analytical testing for each sample is provided in Table 1. Prior to drilling, APS Locates, under subcontract to Shannon & Wilson, completed private utility location services in the vicinity of proposed explorations. Public utilities were marked as part of a utility locate request placed on the Washington Utility Notification Center. Further, each location was cleared for utilities by potholing to 5 feet bgs using non-invasive air knifing and vacuuming methods. Holt Services, Inc., under subcontract to Shannon & Wilson, used a hollow-stem auger drilling rig to complete the borings and well installations. During drilling, soil samples were collected using Standard Penetration Testing equipped with a split-spoon sampler. Borings for the monitoring wells were advanced to 15 feet bgs, with Standard Penetration Test sampling to 16.5 feet bgs. Three of the borings (MW-1 through MW-3) were advanced with a full-size CME-85 hollow-stem auger drilling rig. Four of the borings (MW-4 through MW-7) were advanced with a limited-access CME-75 Mobil L-10-T hollow-stem auger drilling rig. Exploration logs, which indicate soil classifications, estimated depths to water during drilling, and results of field screening for contaminant presence, can be found in Appendix A. Field methodology is also described in Appendix A. Locations of the monitoring wells were surveyed on April 21 and May 9, 2019. The locations of the monitoring wells were surveyed using the North American Datum 83/11 horizontal datum, and elevations used the North American Vertical Datum 88 vertical datum. Measured points include the center of the monitoring well monument, the north side of the top of casing, and the ground surface just to the north of the well monument. The survey data are included as Table 2. 4.2 Soil and Groundwater Sampling A total of 10 soil samples and 7 groundwater samples were collected from the Site during the supplemental ESA. Up to two soil samples were collected from each boring location. Soil samples were taken at the apparent soil-water interface and/or at depths at which visual, olfactory, and/or photoionization detector indication of contamination were observed. Olfactory and visual field indications of contamination (hydrocarbon odors, sheen, and dark staining) were only observed in one of the seven borings, MW-4, from Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 5 approximately 9.5 to 12 feet bgs. For a more detailed description of soil sampling methodology, refer to Appendix A. Following well development, groundwater samples were collected from the newly installed monitoring wells, one per well. Samples were collected using low-flow sampling technology with use of a peristaltic pump. For a more detailed description of well development and groundwater sampling methodology, refer to Appendix A. Water quality parameters were recorded in the field for each well and the field forms are included in Appendix B. 4.3 Analytical Methods Analytical methods were selected based on results of the previous Phase II ESA. The Phase II ESA identified the following potential contaminants of concern for the Site: lube oil/ diesel range petroleum hydrocarbons, VOCs, PAHs, and arsenic (groundwater only). Samples were submitted to OnSite Environmental, Inc. in Redmond, Washington, for chemical analysis. Selected soil samples were analyzed for potential contaminant of concern by the following methods: Gasoline-range hydrocarbons using Method Northwest Total Petroleum Hydrocarbon - Gasoline range (NWTPH-Gx). Diesel- and oil-range hydrocarbons using Method NWTPH-diesel extended (Dx). VOCs by U.S. Environmental Protection Agency (EPA) Method 8260C PAHs by EPA Method 8270D Select soil samples were opportunistically analyzed for common conceptual site model parameters by the following methods: Volatile petroleum hydrocarbons (VPH) using Method NWTPH-VPH Extractable petroleum hydrocarbons (EPH) using Method NWTPH-EPH Total organic carbon by EPA Method 9060A Groundwater samples were analyzed for potential chemical of concern by the following methods: Diesel- and oil-range hydrocarbons using Method NWTPH-Dx Total and dissolved arsenic by EPA Method 6000/7000 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 6 4.4 Analytical Results Tables 3 and 4 provide analytical soil and groundwater results and include MTCA Method A and B criteria (Ecology, 2013 and 2016). The analytical laboratory reports are presented in Appendix D. 4.4.1 Soil Results The soil analytical results are presented in Table 3 and are summarized below. Where no criterion is established under MTCA Method A for a parameter, MTCA Method B values are used. None of the soil samples collected and analyzed during this supplemental ESA exceed MTCA cleanup criteria. The approximated extent of contaminated soil at the site is presented in Figure 7. The following summarizes the encountered soil conditions: 4.4.1.1 Petroleum Hydrocarbons There were no MTCA exceedances for petroleum hydrocarbons in soil. EPH and VPH analyses were on soils collected from MW-4 from 10 to 11.5 feet bgs, correlating with petroleum hydrocarbon odor and sheen. EPH was detected as C16-C21 and C21-C34 aliphatic and aromatics. VPH was not detected. 4.4.1.2 Volatile Organic Compounds (VOCs) and Polycyclic Aromatic Hydrocarbons (PAHs) There were no MTCA exceedances for VOCs or PAHs in soil. 4.4.1.3 Total Organic Carbon Total organic carbon analyses were performed on soils collected from a variety of soil types encountered at the site. Total organic carbon ranged from 0.17 to 0.68% carbon by weight. 4.4.2 Groundwater Results The groundwater analytical results are presented in Table 4 and MTCA Method A exceedances are summarized below. In general, groundwater samples that exceed the MTCA cleanup criteria are located beneath and slightly to the north, east, and south of the RTN001 Service Shop. Exceedances are also located beneath and to the north of the RTN002 Body Shop. The approximated extent of contaminated groundwater at the site is presented in Figure 7 (petroleum hydrocarbons) and Figure 8 (dissolved arsenic). The following MTCA Method A exceedances were detected in groundwater: Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 7 4.4.2.1 Petroleum Hydrocarbons Diesel-range petroleum hydrocarbons were detected in one sample (and duplicate) from monitoring well MW-4. Sample detections ranged from 920 to 990 micrograms per liter (μg/L). Lube oil-range petroleum hydrocarbons were detected in samples from two groundwater monitoring wells (MW-1 and MW-4). Sample detections ranged from 620 to 630 μg/L. The sum of total diesel-, and oil- range hydrocarbons range from 620 to 1,620 μg/L. These exceedances are located in the RTN001 Service Shop (MW-4) and to the north of the RTN002 Body Shop (MW-1) (Figure 7). 4.4.2.2 Arsenic Total arsenic was detected above MTCA Method A cleanup levels in groundwater samples collected from the seven monitoring wells. However, since dissolved arsenic concentrations were also analyzed (following laboratory filtration), these results will be used to assess the environmental impacts of arsenic in groundwater at the Site (e.g., no turbidity impacts). Dissolved arsenic was detected above MTCA Method A cleanup levels in groundwater samples collected from monitoring wells MW-1, MW-2, MW-5, and MW-7. Sample exceedances ranged from 8.8 to 16.0 μg/L (Figure 8). 4.5 Investigation-Derived Waste (IDW) IDW generated during sampling included soil cuttings, decontamination fluids, purge water, used personal protective equipment (PPE), and disposable sampling equipment. Soil cuttings, decontamination fluids, and purge water were contained in labeled Washington State Department of Transportation-approved drums and are temporarily stored along the northern property boundary of the Site, on parcel RTN001. PPE and disposable sampling equipment were placed in doubled plastic bags and disposed of as solid waste. The IDW drums are pending waste profile characterization for disposal. 5 DISCUSSION Based on the data collected for this supplemental ESA, and an evaluation of this data with previous Phase II ESA data, we offer the following discussion items: 5.1 Groundwater Flow Direction Groundwater elevation monitoring has provided an estimate of groundwater flow direction at the Site. The groundwater flows predominately from east to west. Toward the western portion of the site, groundwater begins to flow in more of a north to south direction. This refraction in flow direction may be associated with increased subsurface compaction near Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 8 Rainier Avenue South. The increased compaction would decrease porosity and permeability of subsurface soils, potentially altering groundwater flow direction. 5.2 Diesel and Lube Oil Contamination Soil sampling and laboratory analyses performed as part of this supplemental ESA did not identify any additional MTCA Method A or B exceedances. Given the limited number of detections and the range of detected concentrations, VOCs and PAHs do not appear to be contaminants of concern at the Site. The only chemical of concern in soil at the Site is lube oil/diesel-range petroleum hydrocarbons. The approximated extent of lube oil/diesel-range petroleum hydrocarbons in soil exceeding MTCA Method A cleanup levels is shown in Figure 7. Impacted soil (containing concentrations above detection limits but below MTCA Method A cleanup levels) may extend beyond what is shown. Petroleum hydrocarbon odor and sheen observed in RTN001-5 (in the RTN001 Service Shop) had shallow soil contamination that extended to the groundwater table and subsequently migrate short distances through the poorly graded sand layer aquifer. This can be seen in Figure 3 (A-A') and Figure 5 (C-C'). It is expected that the source of the lube oil/diesel groundwater plume is nearest RTN001-5, where the highest concentration was detected in soil and where field indications of contamination were observed most shallow. The petroleum concentrations detected in RTN001-5 were suggestive of the presence of free product. MW-4, located approximately 50 feet to the southwest of RTN001-5, had no measurable product. If present, it is likely limited in extent. Petroleum hydrocarbon odors and sheens observed in RTN001-10, RTN001-11, RTN002-3, and RTN004-1 had shallow soil contamination that did not extend to the water table. As a result, these areas do not have groundwater contamination and the petroleum hydrocarbons at these locations seem to be bound-up and immobilized within the shallow fine-grained silts and sandy silts. Examples of this occurring can be seen in each of the generalized subsurface profiles. Soil samples collected from MW-1 were below MTCA Method A cleanup levels. No known soil contamination has been identified near the RTN002 Body Shop lube oil/diesel-range groundwater contaminant plume. The source of this groundwater contamination is not known. Groundwater samples collected from MW-2, MW-3, MW-5, MW-6, and MW-7 were analyzed and found to have either non-detect or below MTCA Method A cleanup level concentrations. These findings suggest that the extents of the lube oil/diesel-range Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 9 petroleum hydrocarbons groundwater plume underlying the RTN001 parcel is approximately the footprint of the RTN001 Service Shop (Figure 7). 5.3 Arsenic A geochemical evaluation of arsenic in groundwater was completed to assess whether arsenic is a contaminant of concern. Oxidation reduction potential (ORP) (a parameter collected during groundwater sampling) was converted to Eh. (The YSI Redox ORP Reference Potential sheet used to convert ORP readings to Eh is contained in Appendix C.) We then created Eh and pH plots of (a) Site groundwater data and (b) arsenic speciation/ oxidation state data (Figure 9) to evaluate how the geochemical conditions (e.g., Eh and pH) of Site groundwater may be influencing arsenic concentrations. In general, lower Eh (and to a lesser extent, pH) can have mobilizing effects on naturally occurring arsenic in soil. If groundwater Eh at the Site is low enough that arsenic would be expected to be in the As (III) oxidation state, this may explain the elevated (compared to MTCA) dissolved arsenic in groundwater samples collected from the Site. The evaluation found: Groundwater was monitored to have Eh/pH conditions favorable for As (V) oxidation states in wells MW-3 and MW-6. Groundwater was monitored to have Eh/pH conditions favorable for As (III) oxidation states in wells MW-1, MW-2, MW-4, MW-5, and MW-7 (Figure 9). With the exception of MW-4, dissolved arsenic concentrations are below MTCA Method A cleanup levels when the less mobile As (V) oxidation state is present. With the exception of MW-4, dissolved arsenic concentrations are above MTCA Method A cleanup levels when the more mobile As (III) oxidation state is present. As a result, we conclude that the elevated (compared to MTCA Method A) dissolved arsenic at the site is a result of a negative shift in Eh (and to a lesser extent pH) conditions in groundwater resulting from petroleum hydrocarbon releases to the subsurface and/or the high organic content throughout the Site. Arsenic is not a contaminant of concern. 6CONCLUSIONS Based on the data collected for this supplemental ESA, we offer the following for the Sound Ford Site: Groundwater flows predominately from east to west. Toward the western portion of the site, groundwater begins to flow in more of a north to south direction. Contaminants of concern for both soil and groundwater include diesel- and lube oil- range petroleum hydrocarbons. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 10 Free product was not observed. If present, it is likely limited in extent. Arsenic is not a groundwater contaminant of concern. The extent of the RTN001 Service Shop soil contamination appears to be limited to the northern portion of the building. Soil contamination exists in several spot locations but are likely limited in extent. The extent of RTN001 Service Shop groundwater contamination appears to be limited to the footprint of the building. The source appears to be from somewhere within the building. The extent and source of the RTN002 Body Shop groundwater contamination is not known but is present under a portion of the building. 7 LIMITATIONS Within the limitations of scope, schedule, and budget, Shannon & Wilson has prepared this report in a professional manner, using the level of skill and care normally exercised for similar projects under similar conditions by reputable and competent environmental consultants currently practicing in this area. The scope of services was intended to address only those environmental concerns with significant potential to result in contamination of the Site. The sampling effort was considered limited in extent and served as a screening effort only. It was not intended to define the lateral or vertical extent of soil and/or groundwater contamination. The data presented in this report are based on limited research and sampling at the Site and should be considered representative at the time of our observations. Other areas of contamination that were not obvious during our Site work could be present at the Site. Shannon & Wilson is not responsible for conditions or consequences arising from relevant facts that were concealed, withheld, or not fully disclosed at the time the report was prepared. We also note that the facts and conditions referenced in this report may change over time, and that the conclusions and recommendations set forth here are applicable to the facts and conditions as described only at the time of this report. Shannon & Wilson believes that the conclusions stated here are factual, but no guarantee is made or implied. This report was prepared for the exclusive use of Sound Transit and its representatives, and in no way guarantees that any agency or its staff will reach the same conclusions as Shannon & Wilson. To help you and others in understanding the limitations of our report, Shannon & Wilson has prepared an “Important Information About Your Environmental Site Assessment/Evaluation Report.” Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 11 8 REFERENCES Shannon & Wilson, Inc., 2017, Phase I environmental site assessment, Sound Transit Right- of-Way #RTN001 through RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington: Report prepared by Shannon & Wilson, Seattle, Wash., for Sound Transit, Seattle, Wash., 21-1-16432-281, December 8. Shannon & Wilson, 2018a, Phase II environmental site assessment, Sound Transit Right-of- Way #RTN001 through #RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington: Report prepared by Shannon & Wilson, Seattle, Washington, for Sound Transit, Seattle, Washington, 21-1-16700-301, March 9. Shannon & Wilson, 2018b, Remedial cost estimate, Sound Transit Right-of-Way #RTN001 through #RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington: Report prepared by Shannon & Wilson, Seattle, Washington, for Sound Transit, Seattle, Washington, 21-1-16700-302, March 12. Washington State Department of Ecology (Ecology), 2013, Model Toxics Control Act regulation and statute: MTCA cleanup regulation, chapter 173-340 WAC; Model Toxics Control Act, chapter 70.105D RCW; uniform environmental covenants act, chapter 64.70 RCW (rev.): Olympia, Wash., Washington Dept. of Ecology, Publication no. 94.06, 324 p., available:https://fortress.wa.gov/ecy/publications/SummaryPages/9406.html Washington State Department of Ecology (Ecology), 2016, Cleanup levels and risk calculation (CLARC): Available: https://fortress.wa.gov/ecy/clarc/CLARCHome.aspx, accessed February. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site AssessmentTable 1 - Sampling SummaryGx PAHs VOCsTotal Organic CarbonEPH VPH Arsenic1Location Soil Soil Soil Soil Soil Soil Soil Water WaterMW-1Northwest of Body Shop (on parcel RTN002)Evaluation for potential off- to on-site (RTN002) contaminant migration-- 1 1 1MW-2 2Southwest of Service Shop (on parcel RTN001)Closure/delineation toward the southwest of impacts (RTN001)-- 1 1 1 1 1 1MW-3Southern boundary of parcel RTN003Closure/delineation toward the southern property boundary-- 1 1 1MW-4 2,3Inside Service Shop (on RTN001), southwest of previous boring RTN001-5Potential source zone well to be installed within the vicinity of the highest contaminant concentrations found during the Phase II ESA. Monitor if LNAPL is present.Interior/Coring/Limited Access11 1 1 121 1MW-5North of Used Car Sales Office (on parcel RTN003)Closure toward south end of current plume delineation-- 2 2 1 1MW-6West of Showroom (on parcel RTN001)Evaluation of dissolved arsenic in groundwater-- 1 1 1 1 2 1 1MW-7Eastern parcel boundary of RTN001 (west of Body Shop on RTN002)Evaluation of groundwater downgradient from petroleum hydrocarbon impacts encountered at RTN002-2-- 1 1 1333311107 7NOTES:1 Analyzed for both total and dissolved arsenic.2 A duplicate groundwater sample was collected.3 A duplicate soil sample was collected.4 Analysis quantities do not include duplicate samples.Dx = Northwest Total Petroleum Hydrocarbons as Diesel Extended (NWTPH-Dx); EPH = Extractable Petroleum Hydrocarbons (NWTPH-EPH); ESA = environmental site assessment; Gx = Northwest Total Petroleum Hydrocarbons as Gasoline (NWTPH-Gx); LNAPL = light nonaqueous phase liquid; PAHs = polycyclic aromatic hydrocarbons; VOCs = volatile organic compounds; VPH = Volatile Petroleum Hydrocarbons (NWTPH-VPH)TOTAL ANALYSIS 4DxExploration DesignationPurpose of ExplorationInterior Location/Concrete Coring/Limited Access? 102225-001 102225-001-R1f-T1.xlsx - 6/28/2019/wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Supplemental Environmental Site Assessment Monitoring Well ID Northing Easting Top of PVC Casing Elevation Monument Elevation Ground Elevation MW-1 175368.68 1298509.65 25.9 26.32 26.32 MW-2 175116.18 1298178.48 25.61 26.00 26.00 MW-3 175012.54 1298426.36 26.85 27.10 27.09 MW-4 175253.67 1298326.43 27.33 27.66 27.63 MW-5 175062.88 1298307.60 26.76 27.10 27.09 MW-6 175286.18 1298123.26 26.6 26.93 26.89 MW-7 175279.86 1298480.29 25.79 26.34 26.32 NOTES: Ground elevation was measured to the north of the monument on the pre-existing surface. Monument elevation was measured on top and center of the monument lid. NAD = North American Datum; NAVD = North American Vertical Datum; PVC = polyvinyl chloride Table 2 - Monitoring Well Survey Data Horizontal Datum (NAD 83/11)Vertical Datum (NAVD 88) 102225-001 102225-001-R1f-T2.xlsx - 6/28/2019/wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Supplemental Environmental Site AssessmentLocation MW-1 MW-2 MW-3MW-6 MW-6 MW-7Sample Name MW-1-8.5 MW-2-9.0 MW-3-8.5 MW-4:11.5 MW-4:16 DUP-1 MW-5:6.5 MW-5:14 MW-6:8 MW-6:14 MW-7:8.5Depth (feet bgs) 8.5 9.0 8.5 11.5 16.0 16.0 6.5 14.0 8.0 14.0 8.5Date 4/18/2019 4/18/2019 4/18/2019 5/3/2019 5/3/2019 5/3/2019 5/2/2019 5/2/2019 5/2/2019 5/2/2019 5/3/2019Total Petroleum Hydrocarbons (TPHs)Gasoline Range Organics - <12 - <6.6 - - - - <5.6 - - 100/30* NEDiesel Range Organics <37 <43 <36 <240 (U1) <39 <40 <28 <33 <27 <27 <36 2,000 NELube Oil Range Organics <75 <85 <721,100<79 <7986<66130<54 <73 2,000 NEWet Chemistry (Reported in % by Volume)Total Organic Carbon - - - - - -0.46 (H) 0.17-0.68-NE NEExtractable Petroleum Hydrocarbons (EPHs)C8-C10 Aliphatic - - - <5.0 - - - - - - - NE NEC10-C12 Aliphatic - - - <5.0 - - - - - - - NE NEC12-C16 Aliphatic - - - <5.0 - - - - - - - NE NEC16-C21 Aliphatic - - -98--- ---- NE NEC21-C34 Aliphatic - - -510--- ---- NE NEC8-C10 Aromatic - - - <5.0 - - - - - - - NE NEC10-C12 Aromatic - - - <5.0 - - - - - - - NE NEC12-C16 Aromatic - - - <5.0 - - - - - - - NE NEC16-C21 Aromatic - - -49--- ---- NE NEC21-C34 Aromatic - - -230--- ---- NE NEVolatile Petroleum Hydrocarbons (VPHs)-C5-C6 Aliphatics - - - <5.0 - - - - - - - NE NEC6-C8 Aliphatics - - - <5.0 - - - - - - - NE NEC8-C10 Aliphatics - - - <5.0 - - - - - - - NE NEC10-C12 Aliphatics - - - <5.0 - - - - - - - NE NEC8-C10 Aromatics - - - <5.0 - - - - - - - NE NEC10-C12 Aromatics - - - <5.0 - - - - - - - NE NEC12-C13 Aromatics - - - <5.0 - - - - - - - NE NEPolycyclic Aromatic Hydrocarbons (PAHs)1-Methylnaphthalene - <0.011 - <0.0082 - - - - <0.0072 - - NE 5,6002-Methylnaphthalene -0.012- <0.0082 - - - - <0.0072 - - NE 320Acenaphthene - <0.011 -0.0084- - - - <0.0072 - - NE 4,800Acenaphthylene - <0.011 - <0.0082 - - - - <0.0072 - - NE NEAnthracene - <0.011 - <0.0082 - - - - <0.0072 - - NE 24,000Benz[a]anthracene - <0.011 - <0.041 - - - - <0.0072 - - NE NEBenzo(a)pyrene - <0.011 - <0.041 - - - - <0.0072 - - 0.1 NEBenzo(b)fluoranthene - <0.011 - <0.041 - - - - <0.0072 - - NE NEBenzo(ghi)perylene - <0.011 - <0.041 - - - - <0.0072 - - NE NEBenzo(j,k)fluoranthene - <0.011 - <0.041 - - - - <0.0072 - - NE NEChrysene - <0.011 - <0.041 - - - -0.010- - NE NEDibenzo(a,h)anthracene - <0.011 - <0.041 - - - - <0.0072 - - NE NEFluoranthene - <0.011 - <0.0082 - - - - <0.0072 - - NE 3,200Fluorene - <0.011 - <0.0082 - - - - <0.0072 - - NE 3,200Indeno(1,2,3-cd)pyrene - <0.011 - <0.041 - - - - <0.0072 - - NE NENaphthalene - <0.011 - <0.0082 - - - - <0.0072 - - 5 1,600Phenanthrene - <0.011 - <0.0082 - - - - <0.0072 - - NE NEPyrene - <0.011 - <0.014 (U1) - - - - <0.0072 - - NE 2,400Method B NoncancerMethod A Unrestricted Land UseTable 3 - Soil Results SummaryMW-4MW-5MTCA 102225-001Page 1 of 3102225-001-R1f-T3-T4.xlsx - 6/28/2019/wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Supplemental Environmental Site AssessmentLocation MW-1 MW-2 MW-3MW-6 MW-6 MW-7Sample Name MW-1-8.5 MW-2-9.0 MW-3-8.5 MW-4:11.5 MW-4:16 DUP-1 MW-5:6.5 MW-5:14 MW-6:8 MW-6:14 MW-7:8.5Depth (feet bgs) 8.5 9.0 8.5 11.5 16.0 16.0 6.5 14.0 8.0 14.0 8.5Date 4/18/2019 4/18/2019 4/18/2019 5/3/2019 5/3/2019 5/3/2019 5/2/2019 5/2/2019 5/2/2019 5/2/2019 5/3/2019Method B NoncancerMethod A Unrestricted Land UseTable 3 - Soil Results SummaryMW-4MW-5MTCAVolatile Organic Compounds (VOCs)1,1,1,2-Tetrachloroethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 2,4001,1,1-Trichloroethane - <0.0025 -<0.0011 - - - - <0.00094 - - 2 160,0001,1,2,2-Tetrachloroethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 1,6001,1,2-Trichloroethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 3201,1-Dichloroethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 16,0001,1-Dichloroethene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 16,0001,1-Dichloropropene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NE1,2,3-Trichlorobenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NE1,2,3-Trichloropropane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 3201,2,4-Trichlorobenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 8001,2,4-Trimethylbenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NE1,2-Dibromo-3-chloropropane - <0.012 - <0.0057 - - - - <0.0047 - - NE 161,2-Dichlorobenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 7,2001,2-Dichloroethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 4801,2-Dichloropropane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 7,2001,3,5-Trimethylbenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 8001,3-Dichlorobenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NE1,3-Dichloropropane - <0.0025 - <0.0011 - - - - <0.00094 - - NE NE1,4-Dichlorobenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 5,6002,2-Dichloropropane - <0.0025 - <0.0011 - - - - <0.00094 - - NE NE2-Butanone -0.13-0.0098- - - - <0.0047 - - NE NE2-Chloroethylvinylether - <0.012 - <0.0057 - - - - <0.0047 - - NE NE2-Chlorotoluene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NE2-Hexanone - <0.012 - <0.0057 - - - - <0.0047 - - NE NE4-Chlorotoluene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEAcetone -0.49-0.039- - - - <0.0094 - - NE 72,000Benzene - <0.0025 - <0.0011 - - - - <0.00094 - - 0.03 320Bromobenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEBromochloromethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEBromoform - <0.012 - <0.0057 - - - - <0.0047 - - NE 1,600Bromomethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 112Carbon Disulfide - <0.0025 - <0.0011 - - - - <0.00094 - - NE 8,000Carbon Tetrachloride - <0.0025 - <0.0011 - - - - <0.00094 - - NE 320CFC-11 - <0.0025 - <0.0011 - - - - <0.00094 - - NE NECFC-12 - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEChlorobenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 1,600Chloroethane - <0.012 - <0.0057 - - - - <0.0047 - - NE NEChloroform - <0.0025 - <0.0011 - - - - <0.00094 - - NE 800Chloromethane - <0.012 - <0.0057 - - - - <0.0047 - - NE NECis-1,2-Dichloroethene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NECis-1,3-Dichloropropene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NE 102225-001Page 2 of 3102225-001-R1f-T3-T4.xlsx - 6/28/2019/wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Supplemental Environmental Site AssessmentLocation MW-1 MW-2 MW-3MW-6 MW-6 MW-7Sample Name MW-1-8.5 MW-2-9.0 MW-3-8.5 MW-4:11.5 MW-4:16 DUP-1 MW-5:6.5 MW-5:14 MW-6:8 MW-6:14 MW-7:8.5Depth (feet bgs) 8.5 9.0 8.5 11.5 16.0 16.0 6.5 14.0 8.0 14.0 8.5Date 4/18/2019 4/18/2019 4/18/2019 5/3/2019 5/3/2019 5/3/2019 5/2/2019 5/2/2019 5/2/2019 5/2/2019 5/3/2019Method B NoncancerMethod A Unrestricted Land UseTable 3 - Soil Results SummaryMW-4MW-5MTCADibromochloromethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE 1,600Dibromomethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEDichlorobromomethane - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEEthylbenzene - <0.0025 - <0.0011 - - - - <0.00094 - - 6 8,000Ethylene dibromide - <0.0025 - <0.0011 - - - - <0.00094 - - 0.005 720Hexachlorobutadiene - <0.012 - <0.0057 - - - - <0.0047 - - NE 8Isopropylbenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEm, p-Xylene - <0.0049 - <0.0057 - - - - <0.0047 - - NE 16,000Methyl Iodide - <0.012 - <0.0057 - - - - <0.0047 - - NE NEMethyl Isobutyl Ketone - <0.012 - <0.0057 - - - - <0.0047 - - NE 6,400Methyl t-Butyl Ether - <0.0025 - <0.0011 - - - - <0.00094 - - 0.1 NEMethylene Chloride - <0.012 - <0.0057 - - - - <0.0047 - - 0.02 480Naphthalene - <0.0025 - <0.0011 - - - - <0.00094 - - 5 1,600n-Butylbenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 4,000n-Propylbenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 8,000o-Xylene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 16,000p-Isopropyltoluene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEsec-Butylbenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 8,000Styrene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 16,000tert-Butylbenzene - <0.0025 - <0.0011 - - - - <0.00094 - - NE 8,000Tetrachloroethene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEToluene - <0.012 - <0.0057 - - - - <0.0047 - - 7 6,400Trans-1,2-Dichloroethene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NETrans-1,3-Dichloropropene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NETrichloroethene - <0.0025 - <0.0011 - - - - <0.00094 - - NE NEVinyl Acetate - <0.012 - <0.0057 - - - - <0.0047 - - NE 80,000Vinyl Chloride - <0.0025 - <0.0011 - - - - <0.00094 - - NE 240NOTES:Values reported in milligrams per kilogram (mg/kg)Bold indicates analyte detected< = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limit- = analyte not analyzed* = Cleanup criteria is 100 mg/kg when benzene is not present. Cleanup criteria is 30 mg/kg when benzene is present. bgs = below ground surface; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act; NE = cleanup level not established 102225-001Page 3 of 3102225-001-R1f-T3-T4.xlsx - 6/28/2019/wp/lkn Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Supplemental Environmental Site AssessmentSample Location MW-1 MW-3 MW-5 MW-6 MW-7Sample Name MW-1-042519 MW-2-0425019 MW-102-042519 MW-3-042519 MW-4-050919 MW-104-050919 MW-5-050919 MW-6-050919 MW-7-050919Sample Date 4/25/2019 4/25/2019 4/25/2019 4/25/2019 5/9/2019 5/9/2019 5/9/2019 5/9/2019 5/9/2019 Method A Method BTotal Petroleum Hydrocarbons (TPHs)Diesel Range Organics380<260 <260 <260920 990<260 <260340500 NELube Oil Range Organics620<410 <420 <420 <410630 (N1)<420 <410490500 NEMetalsArsenic (dissolved)8.8 13 16 4.5 3.5<3.010 5.0 135.0 4.8Arsenic (total)26 43 41 12 7.4 7.8 21 7.0 225.0 4.8NOTES:Values reported in micrograms per liter (μg/L)Bold indicates analyte detectedOrange indicates value is above the preliminary screening level< = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limitN1 = Hydrocarbons in diesel range are impacting lube oil-range resultsMTCA = Model Toxics Control Act; NE = cleanup level not establishedTable 4 - Groundwater Results SummaryMW-2MW-4MTCA 102225-001102225-001-R1f-T3-T4.xlsx - 6/28/2019/wp/lkn PROJECT LOCATION 167 405 Railroad Rainier Avenue SS Grady Wa y Renton S 3rd Street900 LakeAvenue SAvenue SSh a t t u c k S 7th Street 515 Benson Drive SRLkLVICINITY MAP Bing Map Image adapted from aerial imagery provided by Autodesk Live Maps and Microsoft Bing Maps reprinted with permission from Microsoft Corporation. NOTE June 2019 102225-001 Filename: J:\_SEA\102225\001\102225-001 Vicinity Map.dwg Date: 06-18-2019 Login: JRSWashingtonProjectLocation 90 5 Sound Ford Property - )LQDO Supplemental ESA Sound Transit ROW #RTN001 Through RTN004 Renton, Washington 0 1,000 2,000 Approximate Scale in Feet FIG. 1 Seattle RTN001Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN001-1RTN003-1RTN003-3RTN003-2RTN002-4RTN003RTN001-4RTN001-9A A'BB'RTN004-1RTN002-3RTN001-3RTN002-1RTN002-2RTN001-6RTN001-7RTN001-8RTN001-10RTN001-2RTN001-5RTN001-11Body ShopShowroomPartsService ShopUsed CarSales OfficeWELL MAPAND PROFILE LOCATIONS102225-0011. Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTE0100 200Approximate Scale in FeetFilename: \\sea-fs1\Drafting\_SEA\102225\001\102225-001 Plan and Profiles.dwg Layout: Figure 2 Date: 06-28-2019 Login: JRSJune 2019Sound Ford Property - )LQDO Supplemental ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonSurveyed Monitoring Well LocationApproximate Probe Location(Completed February 2018)Generalized Subsurface Profile LocationLEGENDMW-1FIG. 2RTN001-11A Elevation in FeetDistance10152025301015202530RTN001-1NorthASouthA'RTN001-2RTN001-5Bend in ProfileB-B'MW-4RTN001-7Bend in ProfileRTN001-8??????Very loose, bluish-gray,Poorly Graded Sand (SP);wet; trace gravel andfines; trace organics.Soft, bluish-gray, Silt;moist to dry; sandy inplaces; laminated withorganics.RTN001-10MW-5??????????????02-08-1802-07-1802-09-1802-08-1802-08-1802-07-18141058405-03-1913232505-02-19??GENERALIZED SUBSURFACEPROFILE A-A'102225-00102.5 5Filename: \\sea-fs1\Drafting\_SEA\102225\001\102225-001 Plan and Profiles.dwg Layout: Figure 3 Date: 06-28-2019 Login: JRSJune 2019FIG. 3Vertical Scale in FeetVertical Exaggeration = 16xSound Ford Property - )LQDO Supplemental ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonLEGEND(Boring)040 80Horizontal Scale in FeetUSCSDesignationUSCS SymbolGeologic UnitDesignationBoring DesignationProjected DistanceStandard Penetration TestBlows/FootStandard Penetration TestBlows/Inches DrivenApproximate GeologicContactApproximate Extent ofField-Screened PetroleumHydrocarbon Impacts (Odor,Sheen, and/or PID)Groundwater Table Measured5/30/19Approximate Depth of SoilSample with Petroleumand/or cPAH ExceedingMTCA A CriteriaBottom of BoringDate Completed6050/6"03-16-02??MW-31. Vertical Datum is NAVD88.2. MW-4 not included in geologic interpretation as soilencountered was sand-fill.3. Geologic contacts are approximate and interpretedfor illustrative and conceptual purposes.NOTES Elevation in FeetDistance8101520253081015202530MW-2RTN001-11RTN001-6Bend in ProfileMW-4A-A'RTN001-4Bend in ProfileSouthwestBNortheastB'MW-7???????????????Very loose, bluish-gray, PoorlyGraded Sand (SP); wet; tracegravel and fines; trace organics.Soft, bluish-gray, Silt; moist todry; sandy in places; laminatedwith organics.?Very soft to soft, brownishto bluish-gray, Silt andSandy Silt; damp to wet.02-07-1802-08-1802-07-18141058405-03-191010304-19-190043105-03-19MW-10224804-18-19GENERALIZED SUBSURFACEPROFILE B-B'102225-001Filename: \\sea-fs1\Drafting\_SEA\102225\001\102225-001 Plan and Profiles.dwg Layout: Figure 4 Date: 06-28-2019 Login: JRSJune 2019FIG. 402.5 5Vertical Scale in FeetVertical Exaggeration = 16xSound Ford Property - )LQDOSupplemental ESASound Transit ROW #RTN001 Through RTN004Renton, Washington040 80Horizontal Scale in Feet1. See Figure 3 for the Profile Legend and Notes.NOTE Elevation in FeetDistance81015202530815202530MW-6RTN001-6MW-4Bend in ProfileB-B'A-A'RTN001-5RTN001-4Bend in ProfileB-B'MW-7RTN002-3WestCEastC'???????????Very loose, bluish-gray, PoorlyGraded Sand (SP); wet; tracegravel and fines; trace organics.Soft, bluish-gray, Silt; moist todry; sandy in places; laminatedwith organics.????????Very soft to soft, brownish to bluish-gray,Silt and Sandy Silt; damp to wet towardsbottom; fill in upper 1-2 feet.02-08-1802-09-1802-07-1802-09-18141058405-03-190043105-03-19131027505-02-19GENERALIZED SUBSURFACEPROFILE C-C'102225-001Filename: \\sea-fs1\Drafting\_SEA\102225\001\102225-001 Plan and Profiles.dwg Layout: Figure 5 Date: 06-28-2019 Login: JRSJune 2019FIG. 502.5 5Vertical Scale in FeetVertical Exaggeration = 16x040 80Horizontal Scale in Feet1. See Figure 3 for the Profile Legend and Notes.NOTE6ound Ford Property - )LQDOSupplemental ESASound Transit ROW #RTN001 Through RTN004Renton, Washington RTN001Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN001-1RTN003-1RTN003-3RTN003-2RTN002-4RTN003RTN001-4RTN001-9RTN004-1RTN002-3RTN001-3RTN002-1RTN002-2RTN001-6RTN001-7RTN001-8RTN001-10RTN001-2RTN001-5RTN001-1118.819.019.219.4 19.6 19.8 20.0MW-1TOC25.90DTW5.70Elev.20.20MW-2TOC25.61DTW7.12Elev.18.49MW-3TOC26.85DTW7.28Elev.19.57MW-4TOC27.33DTW8.24Elev.19.09MW-5TOC26.76DTW8.04Elev.18.72MW-6TOC26.60DTW7.25Elev.19.35MW-7TOC25.79DTW5.92Elev.19.87POTENTIOMETRIC SURFACE MAP102225-0011. Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.2. Vertical Datum is NAVD88.NOTES0100 200Approximate Scale in FeetFilename: \\sea-fs1\Drafting\_SEA\102225\001\102225-001 Potentiometry.dwg Layout: Figure 6 Date: 06-28-2019 Login: JRSJune 2019Sound Ford Property - )LQDOSupplemental ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonMonitoring Well LocationApproximate Potentiometric ContourEstimated Groundwater Flow DirectionApproximate Probe LocationLEGENDMW-1FIG. 6RTN001-1120.0 RTN001Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN001-1RTN003-1RTN003-3RTN003-2RTN002-4RTN003RTN001-4RTN001-9RTN004-1RTN002-3RTN001-3RTN002-1RTN002-2RTN001-6RTN001-7RTN001-8RTN001-10RTN001-2RTN001-5RTN001-11Body ShopShowroomPartsService ShopUsed CarSales OfficeAPPROXIMATE' EXTENTOF LUBE OIL/DIESEL102225-0011. Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTEFilename: \\sea-fs1\Drafting\_SEA\102225\001\102225-001 Plan and Profiles.dwg Layout: Figure 7 Date: 06-28-2019 Login: JRSJune 2019Sound Ford Property - )LQDO Supplemental ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonSurveyed Monitoring Well LocationApproximate Probe Location(Completed February 2018)Approximate Extent of Lube Oil/DieselImpacts(Saturated Zone Soil)LEGENDMW-1FIG. 7Approximate Extent of Lube Oil/DieselImpacts(Groundwater)Approximate Extent of Lube Oil/DieselImpacts(Vadose Zone Soil)RTN001-110100 200Approximate Scale in Feet RTN001Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN001-1RTN003-1RTN003-3RTN003-2RTN002-4RTN003RTN001-4RTN001-9RTN004-1RTN002-3RTN001-3RTN002-1RTN002-2RTN001-6RTN001-7RTN001-8RTN001-10RTN001-2RTN001-5RTN001-11APPROXIMATED EXTENTOF DISSOLVED ARSENIC102225-0011. Bing Map Image adapted from aerial imageryprovided by Autodesk Live Maps and MicrosoftBing Maps reprinted with permission fromMicrosoft Corporation.NOTEFilename: \\sea-fs1\Drafting\_SEA\102225\001\102225-001 Plan and Profiles.dwg Layout: Figure 8 Date: 06-28-2019 Login: JRSJune 2019Sound Ford Property - )LQDO Supplemental ESASound Transit ROW #RTN001 Through RTN004Renton, WashingtonSurveyed Monitoring Well LocationApproximate Probe Location(Completed February 2018)Approximate Dissolved Arsenic Impacts(Groundwater)LEGENDMW-1FIG. 8RTN001-110100 200Approximate Scale in Feet Filename: J:\_SEA\102225\001\102225-001 Graphs.dwg Layout: Figure 9 Date: 06-18-2019 Login: JRSARSENIC SPECIATION PLOTFIG. 9FIG. 9102225-001June 2019Sound Ford Property - )LQDO Supplemental ESASound Transit ROW #RTN001 Through RTN004Renton, Washington1.21.00.80.60.40.20-0.2-0.4-0.6-0.802468101214Water ReducedH3AsO3(III)H2AsO3-(III)HAsO32-(III)AsO33-(III)H3AsO4(V)H2AsO4-(V)HAsO42-(V)AsO43-(V)Water OxidizedSource: Sappa, G., Erqul, S., and Ferranti, F., 2014, GeochemicalModeling and Multivariante Statistical Evaluation of TraceElements in Arsenic Contaminated Groundwater Systems,May 2014, Published Springer Plus.MW-1MW-2MW-3MW-7MW-5MW-6MW-4Arsenic ≤ 5 μg/LLEGENDArsenic ≥ 5 μg/LEh (Volts)pHArsenic (V) and Arsenic (III)Oxidation State Separation Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 6/28/2019-102225-001-R1f-AA.docx/wp/lkn A-iAPPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSAppendix A: Field M ethodology and Exploration LogsAppendix A Field Methodology and Exploration Logs CONTENTS A.1 Introduction...........................................................................................................................A-1 A.2 Pre-sampling Activities........................................................................................................A-1 A.3 Drilling Activities..................................................................................................................A-1 A.3.1 Hollow-stem Auger (HSA) Drilling......................................................................A-1 A.3.2 Well Installation .......................................................................................................A-2 A.4 Soil...........................................................................................................................................A-2 A.4.1 Field Screening .........................................................................................................A-2 A.4.1.1 Photoionization Detector (PID) Measurements...................................A-3 A.4.1.2 Visual Observation..................................................................................A-3 A.4.1.3 Odors.........................................................................................................A-3 A.4.2 Soil Sampling............................................................................................................A-3 A.4.3 Analytical Testing Methods....................................................................................A-4 A.4.4 Decontamination......................................................................................................A-4 A.4.4.1 Drilling Equipment..................................................................................A-4 A.4.4.2 Sampling Equipment...............................................................................A-5 A.5 Groundwater .........................................................................................................................A-5 A.5.1 Product and Groundwater Level Measurements................................................A-5 A.5.2 Monitoring Well Development..............................................................................A-5 A.5.3 Sampling....................................................................................................................A-6 A.5.4 Analytical Testing Methods....................................................................................A-6 A.5.5 Decontamination......................................................................................................A-6 A.6 Sample Handling Requirements.........................................................................................A-7 A.6.1 Sample Handling, Chain-of-Custody (COC), and Transportation Procedures.................................................................................................................A-7 A.6.1.1 Sampling Handling .................................................................................A-7 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 19, 2019 A-iiAPPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSA.6.1.2 Sample Labeling.......................................................................................A-7 A.6.1.3 Chain-of-Custody (COC)........................................................................A-7 A.6.1.4 Sample Transportation............................................................................A-8 A.6.2 Sample Preservation and Holding Times.............................................................A-8 A.7 Investigation-derived Waste (IDW) ...................................................................................A-8 Figures Figure A-1: Soil Description and Log Key (3 sheets) Figure A-2: Log of Boring MW-1 Figure A-3: Log of Boring MW-2 Figure A-4: Log of Boring MW-3 Figure A-5: Log of Boring MW-4 Figure A-6: Log of Boring MW-5 Figure A-7: Log of Boring MW-6 Figure A-8: Log of Boring MW-7 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 A-1APPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSA.1 INTRODUCTION The project consisted of performing subsurface environmental sampling to support acquisition of Sound Transit right-of-way numbers RTN001 through RTN004, located at 750 Rainier Avenue S and 200 S Grady Way in Renton, Washington. The investigation and analysis are intended to assess quality of soil and groundwater that is present in the subsurface. Standard investigation methods, including sample collection, field screening, documentation procedures, and selected analyses, are described briefly in the following subsections. Sample collection and documentation were completed in accordance with Shannon & Wilson, Inc.’s standard operating procedures. A.2 PRE-SAMPLING ACTIVITIES Shannon & Wilson coordinated with Sound Transit Real Estate (Ms. Amy Pinneo) and the Owner Site Representative (Mr. Leo Vickers) to gain access to the Site. A representative of Shannon & Wilson notified the Underground Utilities Location Center (1-800-424-5555) at least 48 hours before the start of subsurface work at the site. Applied Professional Services surveyed the area within 20 feet of each exploration for utilities. An initial site walk was completed on April 12, 2019, to mark locations and confirm site access requirements for subcontractors. Shannon & Wilson also informed Associated Earth Sciences Inc., the Owner's environmental consultant, of our schedule so they could observe field activities. A.3 DRILLING ACTIVITIES A.3.1 Hollow-stem Auger (HSA) Drilling A truck-mounted or a limited-access HSA rig was used to collect subsurface soil samples. A total of 10 soil samples and seven groundwater samples were collected from a total of 7 explorations. Logs for the explorations are included as Figures A-2 through A-8. Explorations were drilled to 15 feet (ft) with sampling to 16.5 ft. Explorations were completed by a drilling contractor under subcontract to Shannon & Wilson. The 15-ft borings were completed using HSA. A geologist observed the explorations, collected soil samples, made groundwater observations, and documented observations in a field boring log. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 A-2APPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSSoil samples were collected from each of the seven explorations for purposes of geologic evaluation and laboratory analytical testing. Soil samples were obtained using a Standard Penetration Testing and was performed at 2.5-foot intervals. The Standard Penetration Test (SPT) consists of a 2-inch outside diameter, 1.375-inch inside diameter, split-spoon sampler driven 18 inches into the bottom of the borehole with a 140-pound hammer free falling 30 inches. A California Modified SPT sampler was used at MW-4 and MW-5 to obtain more soil volume with the larger (3-inch) diameter sampler. After each split-spoon was removed from the borehole, a Shannon & Wilson geologist opened the sampler and visually examined the collected soil. A preliminary classification of the soil was annotated on the field boring log (Figure A-1) and the sample was removed from the split spoon. Soil was also field screened for contaminants using visual, olfactory, and a photoionization detector (PID). A.3.2 Well Installation Following drilling each boring, a monitoring well was installed to collect groundwater samples (seven total, MW-1 through MW-7). The wells were set just off the bottom of the hole and screened to observe groundwater. Well screens were installed from 5 to 15 ft below ground surface (bgs) at each well. The purpose of the monitoring wells was to measure and record groundwater data, including groundwater elevation data, and collect groundwater samples for analytical testing. For each well, installation involved lowering a 2-inch-diameter, Schedule 40 polyvinyl chloride pipe within the drilled borehole. The annular space between the screened section of the monitoring well and the borehole wall was backfilled with filter sand. The annular space above the sand pack (annulus) was backfilled to 3 feet bgs with hydrated bentonite chips. Two feet of bentonite chips was placed in the borehole on top of the sand. Then a flush-mounted, locking valve cover was installed at the top of the well, set in 1 foot of concrete. The design of the surface surrounding the well monument is slightly mounded to minimize surface water flow into the monitoring system. A.4 SOIL Soil sampling included field screening, sample collection, and decontamination. Soil was sampled using a drill rig (as described above). A.4.1 Field Screening Field screening of soil samples was performed to evaluate the potential presence of contamination and inform sampling depths. Typically, at a nonhazardous waste site, the Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 A-3APPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSmost likely locations to encounter contamination are in fill, at the water table interface, in the water table smear (fluctuation) zone, at fill/native soil contacts, and at pronounced changes in permeability. However, the location of contamination, if any, is also site- dependent. Field screening methods consisted of: PID measurements Visual observations Olfactory observations The three methods were used for the Site. New nitrile gloves were worn by the field personnel during the screening. A.4.1.1 Photoionization Detector (PID) Measurements PID measurements were collected from soil samples to screen for volatile organic vapors, such as petroleum hydrocarbons and solvents. Typically, decaying organics can elevate PID measurements. PID measurements were obtained by passing the instrument directly over the soil and by collected headspace readings from soil sealed within a Ziploc bag. A.4.1.2 Visual Observation Visual observations of soil samples were recorded in the boring log. Indications of contamination included: Sheen observed on soil Discolorations A.4.1.3 Odors Unusual odors were recorded when noted during drilling or sampling. A.4.2 Soil Sampling Field personnel collected soil samples by first donning a new pair of disposable nitrile gloves. Disposable or decontaminated steel spoons were used to transfer soil from the split-spoon sampler to the appropriate laboratory-supplied sample containers. Up to two 4- or 8-ounce jars were filled using disposable stainless-steel spoons, and up to four 40-milliliter vials were filled per U.S. Environmental Protection Agency (EPA) Method 5035 using a disposable syringe. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 A-4APPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSSample collection points and depths to saturated zones were noted on the logs. Indications of potential contaminated zones in the soil column was also documented on the logs. A minimum of one soil sample was collected from each boring for analytical testing. The soil samples were collected at depths where field indication suggested the potential for contamination and/or at the soil-groundwater interface. Additional soil samples were collected from other depths. Non-disposable equipment that contacted potentially-contaminated soil was decontaminated prior to and after each use. Disposable equipment intended for one-time was not decontaminated; it was packaged for appropriate disposal after use. A.4.3 Analytical Testing Methods The following analyses were completed on soil samples from the Site: Gasoline-range hydrocarbons using Method Northwest Total Petroleum Hydrocarbon (NWTPH) Gasoline Extended Diesel- and oil-range hydrocarbons using Method NWTPH-Diesel Extended (Dx) Volatile organic compounds by EPA Method 8260C Polycyclic aromatic hydrocarbons by EPA Method 8270D Total organic carbon by EPA Method 9060A Volatile petroleum hydrocarbons (VPH) using Method NWTPH-VPH Extractable petroleum hydrocarbons (EPH) using Method NWTPH-EPH A.4.4 Decontamination The primary objective of the decontamination process is to reduce the potential for the accidental introduction of contaminants to non-contaminated areas or samples. This section describes the methods associated with decontamination of soil sampling equipment. A.4.4.1 Drilling Equipment Equipment used during soil activities, including augers, drill bits, and drill rods were steam cleaned prior to use at a new location. The drilling subcontractor provided a wash station for sampling equipment to be washed and a pressure wash bath to clean the auger segments and other downhole equipment between each exploration. Water generated during decontamination was collected and placed into drums for onsite storage, pending offsite disposal. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 A-5APPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSA.4.4.2 Sampling Equipment Soil sampling equipment was decontaminated prior to each sampling interval. Sampling equipment (e.g., nitrile gloves) was dedicated to a single location to reduce potential cross contamination. Other non-dedicated sampling equipment used during the field activities were decontaminated as follows: Remove gross contamination and particulate matter. Wash thoroughly with Alconox, or similar non-phosphate detergent plus tap water or designated decontamination water supply source. Rinse equipment thoroughly with distilled water. Change gloves. The wash and rinse water was collected in 5-gallon buckets and transferred to a drum for onsite storage, pending offsite disposal. A.5 GROUNDWATER Groundwater sampling included groundwater elevation monitoring, well development, sample collection, and decontamination. A.5.1 Product and Groundwater Level Measurements Prior to collecting initial groundwater samples, each monitoring well was opened and an interface probe was used to measure free product and water level. Depth to product, product thickness (if present), and depth to water were recorded. A.5.2 Monitoring Well Development Following well installation, the monitoring wells were developed to flush fines from the filter pack to improve hydraulic connection between the monitoring well and the aquifer. Well development included surging and pumping with a Waterra pump fitted with a surge block fitted with a one-way valve. Surging and pumping was performed at 0.5-ft intervals along the length of the well screen. Water quality parameters (temperature, oxidation reduction potential, pH, dissolved oxygen, and conductivity) were monitored throughout development using a YSI Pro Plus hand-held device. Turbidity was measured with a LaMotte 2020e turbidimeter. Following surging and pumping, the Waterra tubing was fitted with a metal sediment bailer to remove any sediment that settled to the bottom of the well. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 A-6APPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSA.5.3 Sampling No sooner than 24 hours following well development, groundwater was sampled from each of the new monitoring wells using a peristaltic pump (fitted with disposable polyethylene and silicon tubing) and low-flow sampling techniques. Groundwater samples were collected when water quality measurements have stabilized over three consecutive measurements. Water quality parameters were recorded at 3- to 5-minute intervals using a YSI Pro Plus series groundwater quality meter. Groundwater is considered to have stabilized as defined by the following criteria: pH ±0.1 standard units Temperature ±10% Specific conductance ±3% microSiemens per centimeter Turbidity ±10% nephelometric turbidity units Oxygen ±10 millivolts Dissolved oxygen ±10% or within 10% of 0.2 milligram per liter, whichever is greater Field personnel recorded parameters on water sampling field forms (see Appendix B). Volatile organic analyte (VOA) vials were filled by allowing the sample water to pour down the inside wall of the vials without splashing onto the base. VOA vials were filled to eliminate headspace and the seal/lid was secured. After sample collection was complete, the peristaltic pump was disconnected from the tubing, the well cap was replaced, and the monument lid was secured. A.5.4 Analytical Testing Methods The following analyses were completed on the seven groundwater samples: Total petroleum hydrocarbon diesel- and oil-range by Method NWTPH-Dx, and Total and dissolved arsenic by EPA Method 6000/7000 A.5.5 Decontamination Groundwater sampling equipment was cleaned prior to and at the completion of sampling each well. Sampling equipment (e.g., nitrile gloves) was dedicated to a single location to reduce potential cross contamination. Other non-dedicated sampling equipment used during the field activities were decontaminated as outlined above in Paragraph A.4.4.2. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 A-7APPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSA.6 SAMPLE HANDLING REQUIREMENTS A.6.1 Sample Handling, Chain-of-Custody (COC), and Transportation Procedures Environmental samples collected during the project were labeled, stored, and transported using standard COC and Shannon & Wilson protocols. These protocols are summarized below: A.6.1.1 Sampling Handling Environmental samples were collected using disposable sampling equipment. New nitrile gloves were worn by the sampler during collection of each sample. Field notes documented site conditions and sample collection activities. Samples collected for laboratory analysis were placed into laboratory-provided glassware and containerized sequentially, with the most volatile target analyte collected first. The sample container labels were completed using indelible ink. The samples were sealed in plastic bags, and then placed into a cooler and maintained at approximately 4 degrees Celsius (qC) (+ 2qC) with “blue ice.” A.6.1.2 Sample Labeling Sample container labels were completed immediately following sample collection. At a minimum, container labels included the following information: Date and time of collection, Location of the sample, Name or initials of sample collector, Unique sample identification, Analysis requested, and Chemical preservative used. A.6.1.3 Chain-of-Custody (COC) Once a sample was collected, it was placed within a cooler with blue ice and remained in the custody of the sampler until delivery to the laboratory. Sample information was entered onto a COC form along with the requested analyses. Upon transfer of sample possession to the laboratory, the COC form was signed and time stamped by the person(s) transferring and receiving custody of the sample container. Upon Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 A-8APPENDIX A: FIELD METHODOLOGY AND EXPLORATION LOGSreceipt of samples at the laboratory, the condition of the samples were recorded by the receiver. COC records are included in the analytical report prepared by the laboratory. A.6.1.4 Sample Transportation Samples were transported to the analytical laboratory within a cooler containing blue ice to ensure that samples were maintained within the appropriate temperature range (between 0°C and 6°C). Samples were dropped at the laboratory by field personnel or picked up by the laboratory (or courier) at the Shannon & Wilson office. Carriers who are only involved in the transport of sealed coolers were not required to sign the COC. A.6.2 Sample Preservation and Holding Times Samples were preserved per the specific analytical methods and extracted/analyzed within holding times. 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ound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 B-iAPPENDIX B: GROUNDWATER SAMPLING FORMS Appendix B: Groundwater Sampling FormsAppendix B Groundwater Sampling Forms CONTENTS Water Sampling Forms, MW-1 through MW-7 Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 C-iAPPENDIX C: REDOX ORP REFERENCE POTENTIALSAppendix C: Redox ORP Reference PotentialsAppendix C Redox ORP Reference Potentials CONTENTS Table, Relationships of mV output of Redox sensors with various reference types SHE Calomel Ag/AgCl Ag/AgCl Ag/AgCl Ag/AgCl (Eh) Saturated KCl 1M KCl 3.5M KCl 4M KCl Saturated KCL 0 -245 -236 -205 -200 -199 245 0 9 40 45 46 236 -9 0 31 36 37 205 -40 -31 0 5 6 200 -45 -36 -5 0 1 199 -46 -37 -6 -1 0 Reference System comparison calculator If SHE reads 0 mV Calomel reads -245 mV Ag/AgCl 1M KCl reads -236 mV Ag/AgCl 3.5M KCl reads -205 mV Ag/AgCl 4M KCl reads -200 mV Ag/AgCl Saturated KCl reads -199 mV If Calomel reads -245 mV SHE reads 0 mV Ag/AgCl 1M KCl reads -236 mV Ag/AgCl 3.5M KCl reads -205 mV Ag/AgCl 4M KCl reads -200 mV Ag/AgCl Saturated KCl reads -199 mV If Ag/AgCl 1M KCL reads -236 mV SHE reads 0 mV Calomel reads -245 mV Ag/AgCl 3.5M KCl reads -205 mV Ag/AgCl 4M KCl reads -200 mV Ag/AgCl Saturated KCl reads -199 mV If Ag/AgCl 3.5M KCL reads -205 mV SHE reads 0 mV Calomel reads -245 mV Ag/AgCl 1M KCl reads -236 mV Ag/AgCl 4M KCl reads -200 mV Ag/AgCl Saturated KCl reads -199 mV If Ag/AgCl 4M KCL reads -200 mV SHE reads 0 mV Calomel reads -245 mV Ag/AgCl 1M KCl reads -236 mV Ag/AgCl 3.5M KCl reads -205 mV Ag/AgCl Saturated KCl reads -199 mV If Ag/AgCl Saturated KCL reads -199 mV SHE reads 0 mV Calomel reads -245 mV Ag/AgCl 1M KCl reads -236 mV Ag/AgCl 3.5M KCl reads -205 mV Ag/AgCl 4M KCl reads -200 mV Reference Standard Methods for the Examination of Water and Wastewater 20th Edition, 1999 Section 2580 : Oxidation Reduction Potential (ORP) Enter the reading obtained from one reference system into the relevant yellow box. The reading that would have been obtained with any of the alternative reference systems is then shown in the green boxes. Relationships of mV output of Redox sensors with various reference types @ 25 oC (YSI sensors are Ag/AgCl 3.5M KCl) Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 D-iAPPENDIX D: ANALYTICAL LABORATORY REPORTSAppendix D: Analytical Laboratory ReportsAppendix D Analytical Laboratory Reports CONTENTS Analytical Data Laboratory Reference No. 1904-243 Analytical Data Laboratory Reference No. 1904-305 Analytical Data Laboratory Reference No. 1904-056 Analytical Data Laboratory Reference No. 1904-056B Analytical Data Laboratory Reference No. 1904-163 Analytical Data Laboratory Reference No. 1904-163B OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 April 29, 2019 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 102225-001 Laboratory Reference No. 1904-243 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on April 19, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 Case Narrative Samples were collected on April 18, 2019 and received by the laboratory on April 19, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-2-9.0 Laboratory ID: 04-243-03 Gasoline ND 12 NWTPH-Gx 4-25-19 4-25-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 91 57-129 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0425S1 Gasoline ND 5.0 NWTPH-Gx 4-25-19 4-25-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 91 57-129 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 04-152-01 ORIG DUP Gasoline 54.7 57.2 NA NA NA NA 4 30 Surrogate: Fluorobenzene 98 101 57-129 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-3-8.5 Laboratory ID: 04-243-01 Diesel Range Organics ND 36 NWTPH-Dx 4-25-19 4-26-19 Lube Oil Range Organics ND 72 NWTPH-Dx 4-25-19 4-26-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 68 50-150 Client ID: MW-1-8.5 Laboratory ID: 04-243-02 Diesel Range Organics ND 37 NWTPH-Dx 4-25-19 4-29-19 Lube Oil Range Organics ND 75 NWTPH-Dx 4-25-19 4-29-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 88 50-150 Client ID: MW-2-9.0 Laboratory ID: 04-243-03 Diesel Range Organics ND 43 NWTPH-Dx 4-25-19 4-26-19 Lube Oil Range Organics ND 85 NWTPH-Dx 4-25-19 4-26-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 67 50-150 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0425S2 Diesel Range Organics ND 25 NWTPH-Dx 4-25-19 4-26-19 Lube Oil Range Organics ND 50 NWTPH-Dx 4-25-19 4-26-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 88 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 04-240-04 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 86 83 50-150 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 VOLATILE ORGANICS EPA 8260C page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-2-9.0 Laboratory ID: 04-243-03 Dichlorodifluoromethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Chloromethane ND 0.012 EPA 8260C 4-24-19 4-24-19 Vinyl Chloride ND 0.0025 EPA 8260C 4-24-19 4-24-19 Bromomethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Chloroethane ND 0.012 EPA 8260C 4-24-19 4-24-19 Trichlorofluoromethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,1-Dichloroethene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Acetone 0.49 0.025 EPA 8260C 4-24-19 4-24-19 Iodomethane ND 0.012 EPA 8260C 4-24-19 4-24-19 Carbon Disulfide ND 0.0025 EPA 8260C 4-24-19 4-24-19 Methylene Chloride ND 0.012 EPA 8260C 4-24-19 4-24-19 (trans) 1,2-Dichloroethene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Methyl t-Butyl Ether ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,1-Dichloroethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Vinyl Acetate ND 0.012 EPA 8260C 4-24-19 4-24-19 2,2-Dichloropropane ND 0.0025 EPA 8260C 4-24-19 4-24-19 (cis) 1,2-Dichloroethene ND 0.0025 EPA 8260C 4-24-19 4-24-19 2-Butanone 0.13 0.012 EPA 8260C 4-24-19 4-24-19 Bromochloromethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Chloroform ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,1,1-Trichloroethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Carbon Tetrachloride ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,1-Dichloropropene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Benzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,2-Dichloroethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Trichloroethene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,2-Dichloropropane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Dibromomethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Bromodichloromethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 2-Chloroethyl Vinyl Ether ND 0.012 EPA 8260C 4-24-19 4-24-19 (cis) 1,3-Dichloropropene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Methyl Isobutyl Ketone ND 0.012 EPA 8260C 4-24-19 4-24-19 Toluene ND 0.012 EPA 8260C 4-24-19 4-24-19 (trans) 1,3-Dichloropropene ND 0.0025 EPA 8260C 4-24-19 4-24-19 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 VOLATILE ORGANICS EPA 8260C page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-2-9.0 Laboratory ID: 04-243-03 1,1,2-Trichloroethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Tetrachloroethene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,3-Dichloropropane ND 0.0025 EPA 8260C 4-24-19 4-24-19 2-Hexanone ND 0.012 EPA 8260C 4-24-19 4-24-19 Dibromochloromethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,2-Dibromoethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Chlorobenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,1,1,2-Tetrachloroethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 Ethylbenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 m,p-Xylene ND 0.0049 EPA 8260C 4-24-19 4-24-19 o-Xylene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Styrene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Bromoform ND 0.012 EPA 8260C 4-24-19 4-24-19 Isopropylbenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Bromobenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,1,2,2-Tetrachloroethane ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,2,3-Trichloropropane ND 0.0025 EPA 8260C 4-24-19 4-24-19 n-Propylbenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 2-Chlorotoluene ND 0.0025 EPA 8260C 4-24-19 4-24-19 4-Chlorotoluene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,3,5-Trimethylbenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 tert-Butylbenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,2,4-Trimethylbenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 sec-Butylbenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,3-Dichlorobenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 p-Isopropyltoluene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,4-Dichlorobenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,2-Dichlorobenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 n-Butylbenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,2-Dibromo-3-chloropropane ND 0.012 EPA 8260C 4-24-19 4-24-19 1,2,4-Trichlorobenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Hexachlorobutadiene ND 0.012 EPA 8260C 4-24-19 4-24-19 Naphthalene ND 0.0025 EPA 8260C 4-24-19 4-24-19 1,2,3-Trichlorobenzene ND 0.0025 EPA 8260C 4-24-19 4-24-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 112 68-139 Toluene-d8 104 79-128 4-Bromofluorobenzene 96 71-132 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 VOLATILE ORGANICS EPA 8260C METHOD BLANK QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0424S1 Dichlorodifluoromethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Chloromethane ND 0.0050 EPA 8260C 4-24-19 4-24-19 Vinyl Chloride ND 0.0010 EPA 8260C 4-24-19 4-24-19 Bromomethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Chloroethane ND 0.0050 EPA 8260C 4-24-19 4-24-19 Trichlorofluoromethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,1-Dichloroethene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Acetone ND 0.010 EPA 8260C 4-24-19 4-24-19 Iodomethane ND 0.0050 EPA 8260C 4-24-19 4-24-19 Carbon Disulfide ND 0.0010 EPA 8260C 4-24-19 4-24-19 Methylene Chloride ND 0.0050 EPA 8260C 4-24-19 4-24-19 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,1-Dichloroethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Vinyl Acetate ND 0.0050 EPA 8260C 4-24-19 4-24-19 2,2-Dichloropropane ND 0.0010 EPA 8260C 4-24-19 4-24-19 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 4-24-19 4-24-19 2-Butanone ND 0.0050 EPA 8260C 4-24-19 4-24-19 Bromochloromethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Chloroform ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Carbon Tetrachloride ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,1-Dichloropropene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Benzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,2-Dichloroethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Trichloroethene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,2-Dichloropropane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Dibromomethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Bromodichloromethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260C 4-24-19 4-24-19 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Methyl Isobutyl Ketone ND 0.0050 EPA 8260C 4-24-19 4-24-19 Toluene ND 0.0050 EPA 8260C 4-24-19 4-24-19 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 4-24-19 4-24-19 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 VOLATILE ORGANICS EPA 8260C METHOD BLANK QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0424S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Tetrachloroethene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,3-Dichloropropane ND 0.0010 EPA 8260C 4-24-19 4-24-19 2-Hexanone ND 0.0050 EPA 8260C 4-24-19 4-24-19 Dibromochloromethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,2-Dibromoethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Chlorobenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 Ethylbenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 m,p-Xylene ND 0.0020 EPA 8260C 4-24-19 4-24-19 o-Xylene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Styrene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Bromoform ND 0.0050 EPA 8260C 4-24-19 4-24-19 Isopropylbenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Bromobenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 4-24-19 4-24-19 n-Propylbenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 2-Chlorotoluene ND 0.0010 EPA 8260C 4-24-19 4-24-19 4-Chlorotoluene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 tert-Butylbenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 sec-Butylbenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 p-Isopropyltoluene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 n-Butylbenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260C 4-24-19 4-24-19 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Hexachlorobutadiene ND 0.0050 EPA 8260C 4-24-19 4-24-19 Naphthalene ND 0.0010 EPA 8260C 4-24-19 4-24-19 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 4-24-19 4-24-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 108 68-139 Toluene-d8 105 79-128 4-Bromofluorobenzene 111 71-132 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 VOLATILE ORGANICS EPA 8260C SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0424S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0502 0.0489 0.0500 0.0500 100 98 53-141 3 17 Benzene 0.0562 0.0544 0.0500 0.0500 112 109 70-130 3 15 Trichloroethene 0.0519 0.0489 0.0500 0.0500 104 98 74-122 6 16 Toluene 0.0548 0.0521 0.0500 0.0500 110 104 76-130 5 15 Chlorobenzene 0.0524 0.0485 0.0500 0.0500 105 97 75-120 8 14 Surrogate: Dibromofluoromethane 110 113 68-139 Toluene-d8 105 105 79-128 4-Bromofluorobenzene 108 106 71-132 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 SEMIVOLATILE ORGANICS EPA 8270D/SIM page 1 of 2 Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-2-9.0 Laboratory ID: 04-243-03 n-Nitrosodimethylamine ND 0.057 EPA 8270D 4-26-19 4-26-19 Pyridine ND 0.57 EPA 8270D 4-26-19 4-26-19 Phenol ND 0.057 EPA 8270D 4-26-19 4-26-19 Aniline ND 0.28 EPA 8270D 4-26-19 4-26-19 bis(2-Chloroethyl)ether ND 0.057 EPA 8270D 4-26-19 4-26-19 2-Chlorophenol ND 0.057 EPA 8270D 4-26-19 4-26-19 1,3-Dichlorobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 1,4-Dichlorobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 Benzyl alcohol ND 0.28 EPA 8270D 4-26-19 4-26-19 1,2-Dichlorobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 2-Methylphenol (o-Cresol) ND 0.057 EPA 8270D 4-26-19 4-26-19 bis(2-Chloroisopropyl)ether ND 0.057 EPA 8270D 4-26-19 4-26-19 (3+4)-Methylphenol (m,p-Cresol) ND 0.057 EPA 8270D 4-26-19 4-26-19 n-Nitroso-di-n-propylamine ND 0.057 EPA 8270D 4-26-19 4-26-19 Hexachloroethane ND 0.057 EPA 8270D 4-26-19 4-26-19 Nitrobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 Isophorone ND 0.057 EPA 8270D 4-26-19 4-26-19 2-Nitrophenol ND 0.057 EPA 8270D 4-26-19 4-26-19 2,4-Dimethylphenol ND 0.057 EPA 8270D 4-26-19 4-26-19 bis(2-Chloroethoxy)methane ND 0.057 EPA 8270D 4-26-19 4-26-19 2,4-Dichlorophenol ND 0.057 EPA 8270D 4-26-19 4-26-19 1,2,4-Trichlorobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 Naphthalene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 4-Chloroaniline ND 0.28 EPA 8270D 4-26-19 4-26-19 Hexachlorobutadiene ND 0.057 EPA 8270D 4-26-19 4-26-19 4-Chloro-3-methylphenol ND 0.057 EPA 8270D 4-26-19 4-26-19 2-Methylnaphthalene 0.012 0.011 EPA 8270D/SIM 4-26-19 4-26-19 1-Methylnaphthalene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Hexachlorocyclopentadiene ND 0.057 EPA 8270D 4-26-19 4-26-19 2,4,6-Trichlorophenol ND 0.057 EPA 8270D 4-26-19 4-26-19 2,3-Dichloroaniline ND 0.057 EPA 8270D 4-26-19 4-26-19 2,4,5-Trichlorophenol ND 0.057 EPA 8270D 4-26-19 4-26-19 2-Chloronaphthalene ND 0.057 EPA 8270D 4-26-19 4-26-19 2-Nitroaniline ND 0.057 EPA 8270D 4-26-19 4-26-19 1,4-Dinitrobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 Dimethylphthalate ND 0.057 EPA 8270D 4-26-19 4-26-19 1,3-Dinitrobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 2,6-Dinitrotoluene ND 0.057 EPA 8270D 4-26-19 4-26-19 1,2-Dinitrobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 Acenaphthylene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 3-Nitroaniline ND 0.057 EPA 8270D 4-26-19 4-26-19 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 SEMIVOLATILE ORGANICS EPA 8270D/SIM page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-2-9.0 Laboratory ID: 04-243-03 2,4-Dinitrophenol ND 0.28 EPA 8270D 4-26-19 4-26-19 Acenaphthene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 4-Nitrophenol ND 0.057 EPA 8270D 4-26-19 4-26-19 2,4-Dinitrotoluene ND 0.057 EPA 8270D 4-26-19 4-26-19 Dibenzofuran ND 0.057 EPA 8270D 4-26-19 4-26-19 2,3,5,6-Tetrachlorophenol ND 0.057 EPA 8270D 4-26-19 4-26-19 2,3,4,6-Tetrachlorophenol ND 0.057 EPA 8270D 4-26-19 4-26-19 Diethylphthalate ND 0.28 EPA 8270D 4-26-19 4-26-19 4-Chlorophenyl-phenylether ND 0.057 EPA 8270D 4-26-19 4-26-19 4-Nitroaniline ND 0.057 EPA 8270D 4-26-19 4-26-19 Fluorene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 4,6-Dinitro-2-methylphenol ND 0.28 EPA 8270D 4-26-19 4-26-19 n-Nitrosodiphenylamine ND 0.057 EPA 8270D 4-26-19 4-26-19 1,2-Diphenylhydrazine ND 0.057 EPA 8270D 4-26-19 4-26-19 4-Bromophenyl-phenylether ND 0.057 EPA 8270D 4-26-19 4-26-19 Hexachlorobenzene ND 0.057 EPA 8270D 4-26-19 4-26-19 Pentachlorophenol ND 0.28 EPA 8270D 4-26-19 4-26-19 Phenanthrene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Anthracene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Carbazole ND 0.057 EPA 8270D 4-26-19 4-26-19 Di-n-butylphthalate ND 0.28 EPA 8270D 4-26-19 4-26-19 Fluoranthene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Benzidine ND 0.57 EPA 8270D 4-26-19 4-26-19 Pyrene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Butylbenzylphthalate ND 0.28 EPA 8270D 4-26-19 4-26-19 bis-2-Ethylhexyladipate ND 0.28 EPA 8270D 4-26-19 4-26-19 3,3'-Dichlorobenzidine ND 0.28 EPA 8270D 4-26-19 4-26-19 Benzo[a]anthracene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Chrysene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 bis(2-Ethylhexyl)phthalate ND 0.28 EPA 8270D 4-26-19 4-26-19 Di-n-octylphthalate ND 0.28 EPA 8270D 4-26-19 4-26-19 Benzo[b]fluoranthene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Benzo(j,k)fluoranthene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Benzo[a]pyrene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Indeno[1,2,3-cd]pyrene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Dibenz[a,h]anthracene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Benzo[g,h,i]perylene ND 0.011 EPA 8270D/SIM 4-26-19 4-26-19 Surrogate: Percent Recovery Control Limits 2-Fluorophenol 78 19 - 103 Phenol-d6 80 30 - 103 Nitrobenzene-d5 82 27 - 105 2-Fluorobiphenyl 76 36 - 102 2,4,6-Tribromophenol 80 33 - 110 Terphenyl-d14 85 38 - 108 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 SEMIVOLATILE ORGANICS EPA 8270D/SIM METHOD BLANK QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0426S1 n-Nitrosodimethylamine ND 0.033 EPA 8270D 4-26-19 4-26-19 Pyridine ND 0.33 EPA 8270D 4-26-19 4-26-19 Phenol ND 0.033 EPA 8270D 4-26-19 4-26-19 Aniline ND 0.17 EPA 8270D 4-26-19 4-26-19 bis(2-Chloroethyl)ether ND 0.033 EPA 8270D 4-26-19 4-26-19 2-Chlorophenol ND 0.033 EPA 8270D 4-26-19 4-26-19 1,3-Dichlorobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 1,4-Dichlorobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 Benzyl alcohol ND 0.17 EPA 8270D 4-26-19 4-26-19 1,2-Dichlorobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 2-Methylphenol (o-Cresol) ND 0.033 EPA 8270D 4-26-19 4-26-19 bis(2-Chloroisopropyl)ether ND 0.033 EPA 8270D 4-26-19 4-26-19 (3+4)-Methylphenol (m,p-Cresol) ND 0.033 EPA 8270D 4-26-19 4-26-19 n-Nitroso-di-n-propylamine ND 0.033 EPA 8270D 4-26-19 4-26-19 Hexachloroethane ND 0.033 EPA 8270D 4-26-19 4-26-19 Nitrobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 Isophorone ND 0.033 EPA 8270D 4-26-19 4-26-19 2-Nitrophenol ND 0.033 EPA 8270D 4-26-19 4-26-19 2,4-Dimethylphenol ND 0.033 EPA 8270D 4-26-19 4-26-19 bis(2-Chloroethoxy)methane ND 0.033 EPA 8270D 4-26-19 4-26-19 2,4-Dichlorophenol ND 0.033 EPA 8270D 4-26-19 4-26-19 1,2,4-Trichlorobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 Naphthalene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 4-Chloroaniline ND 0.17 EPA 8270D 4-26-19 4-26-19 Hexachlorobutadiene ND 0.033 EPA 8270D 4-26-19 4-26-19 4-Chloro-3-methylphenol ND 0.033 EPA 8270D 4-26-19 4-26-19 2-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 1-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Hexachlorocyclopentadiene ND 0.033 EPA 8270D 4-26-19 4-26-19 2,4,6-Trichlorophenol ND 0.033 EPA 8270D 4-26-19 4-26-19 2,3-Dichloroaniline ND 0.033 EPA 8270D 4-26-19 4-26-19 2,4,5-Trichlorophenol ND 0.033 EPA 8270D 4-26-19 4-26-19 2-Chloronaphthalene ND 0.033 EPA 8270D 4-26-19 4-26-19 2-Nitroaniline ND 0.033 EPA 8270D 4-26-19 4-26-19 1,4-Dinitrobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 Dimethylphthalate ND 0.033 EPA 8270D 4-26-19 4-26-19 1,3-Dinitrobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 2,6-Dinitrotoluene ND 0.033 EPA 8270D 4-26-19 4-26-19 1,2-Dinitrobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 Acenaphthylene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 3-Nitroaniline ND 0.033 EPA 8270D 4-26-19 4-26-19 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 SEMIVOLATILE ORGANICS EPA 8270D/SIM METHOD BLANK QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0426S1 2,4-Dinitrophenol ND 0.17 EPA 8270D 4-26-19 4-26-19 Acenaphthene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 4-Nitrophenol ND 0.033 EPA 8270D 4-26-19 4-26-19 2,4-Dinitrotoluene ND 0.033 EPA 8270D 4-26-19 4-26-19 Dibenzofuran ND 0.033 EPA 8270D 4-26-19 4-26-19 2,3,5,6-Tetrachlorophenol ND 0.033 EPA 8270D 4-26-19 4-26-19 2,3,4,6-Tetrachlorophenol ND 0.033 EPA 8270D 4-26-19 4-26-19 Diethylphthalate ND 0.17 EPA 8270D 4-26-19 4-26-19 4-Chlorophenyl-phenylether ND 0.033 EPA 8270D 4-26-19 4-26-19 4-Nitroaniline ND 0.033 EPA 8270D 4-26-19 4-26-19 Fluorene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 4,6-Dinitro-2-methylphenol ND 0.17 EPA 8270D 4-26-19 4-26-19 n-Nitrosodiphenylamine ND 0.033 EPA 8270D 4-26-19 4-26-19 1,2-Diphenylhydrazine ND 0.033 EPA 8270D 4-26-19 4-26-19 4-Bromophenyl-phenylether ND 0.033 EPA 8270D 4-26-19 4-26-19 Hexachlorobenzene ND 0.033 EPA 8270D 4-26-19 4-26-19 Pentachlorophenol ND 0.17 EPA 8270D 4-26-19 4-26-19 Phenanthrene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Anthracene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Carbazole ND 0.033 EPA 8270D 4-26-19 4-26-19 Di-n-butylphthalate ND 0.17 EPA 8270D 4-26-19 4-26-19 Fluoranthene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Benzidine ND 0.33 EPA 8270D 4-26-19 4-26-19 Pyrene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Butylbenzylphthalate ND 0.17 EPA 8270D 4-26-19 4-26-19 bis-2-Ethylhexyladipate ND 0.17 EPA 8270D 4-26-19 4-26-19 3,3'-Dichlorobenzidine ND 0.17 EPA 8270D 4-26-19 4-26-19 Benzo[a]anthracene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Chrysene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 bis(2-Ethylhexyl)phthalate ND 0.17 EPA 8270D 4-26-19 4-26-19 Di-n-octylphthalate ND 0.17 EPA 8270D 4-26-19 4-26-19 Benzo[b]fluoranthene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Benzo(j,k)fluoranthene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Benzo[a]pyrene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Indeno[1,2,3-cd]pyrene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Dibenz[a,h]anthracene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Benzo[g,h,i]perylene ND 0.0067 EPA 8270D/SIM 4-26-19 4-26-19 Surrogate: Percent Recovery Control Limits 2-Fluorophenol 69 19 - 103 Phenol-d6 71 30 - 103 Nitrobenzene-d5 71 27 - 105 2-Fluorobiphenyl 70 36 - 102 2,4,6-Tribromophenol 84 33 - 110 Terphenyl-d14 80 38 - 108 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 SEMIVOLATILE ORGANICS EPA 8270D/SIM SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/Kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0426S1 SB SBD SB SBD SB SBD Phenol 0.982 1.08 1.33 1.33 74 81 45 - 105 10 29 2-Chlorophenol 0.983 1.11 1.33 1.33 74 83 46 - 105 12 33 1,4-Dichlorobenzene 0.464 0.529 0.667 0.667 70 79 42 - 105 13 37 n-Nitroso-di-n-propylamine 0.571 0.575 0.667 0.667 86 86 45 - 105 1 26 1,2,4-Trichlorobenzene 0.468 0.521 0.667 0.667 70 78 45 - 105 11 32 4-Chloro-3-methylphenol 1.22 1.21 1.33 1.33 92 91 55 - 105 1 21 Acenaphthene 0.509 0.500 0.667 0.667 76 75 48 - 105 2 21 4-Nitrophenol 1.37 1.33 1.33 1.33 103 100 53 - 105 3 20 2,4-Dinitrotoluene 0.584 0.571 0.667 0.667 88 86 47 - 105 2 19 Pentachlorophenol 1.21 1.09 1.33 1.33 91 82 35 - 125 10 26 Pyrene 0.564 0.551 0.667 0.667 85 83 55 - 110 2 17 Surrogate: 2-Fluorophenol 78 91 19 - 103 Phenol-d6 81 90 30 - 103 Nitrobenzene-d5 80 89 27 - 105 2-Fluorobiphenyl 79 82 36 - 102 2,4,6-Tribromophenol 96 92 33 - 110 Terphenyl-d14 83 82 38 - 108 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: April 29, 2019 Samples Submitted: April 19, 2019 Laboratory Reference: 1904-243 Project: 102225-001 % MOISTURE Date Analyzed: 4-24-19 Client ID Lab ID % Moisture MW-3-8.5 04-243-01 31 MW-1-8.5 04-243-02 33 MW-2-9.0 04-243-03 41 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 May 6, 2019 Joe Sawdey Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 102225-001 Laboratory Reference No. 1904-305 Dear Joe: Enclosed are the analytical results and associated quality control data for samples submitted on April 26, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 6, 2019 Samples Submitted: April 26, 2019 Laboratory Reference: 1904-305 Project: 102225-001 Case Narrative Samples were collected on April 25, 2019 and received by the laboratory on April 26, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 6, 2019 Samples Submitted: April 26, 2019 Laboratory Reference: 1904-305 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-1-042519 Laboratory ID: 04-305-01 Diesel Range Organics 0.38 0.26 NWTPH-Dx 5-1-19 5-3-19 Lube Oil Range Organics 0.62 0.41 NWTPH-Dx 5-1-19 5-3-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 95 50-150 Client ID: MW-2-042519 Laboratory ID: 04-305-02 Diesel Range Organics ND 0.26 NWTPH-Dx 5-1-19 5-3-19 Lube Oil Range Organics ND 0.41 NWTPH-Dx 5-1-19 5-3-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 Client ID: MW-3-042519 Laboratory ID: 04-305-03 Diesel Range Organics ND 0.26 NWTPH-Dx 5-1-19 5-3-19 Lube Oil Range Organics ND 0.42 NWTPH-Dx 5-1-19 5-3-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 89 50-150 Client ID: MW-102-042519 Laboratory ID: 04-305-04 Diesel Range Organics ND 0.26 NWTPH-Dx 5-1-19 5-3-19 Lube Oil Range Organics ND 0.42 NWTPH-Dx 5-1-19 5-3-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 87 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 6, 2019 Samples Submitted: April 26, 2019 Laboratory Reference: 1904-305 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0501W1 Diesel Range Organics ND 0.25 NWTPH-Dx 5-1-19 5-2-19 Lube Oil Range Organics ND 0.40 NWTPH-Dx 5-1-19 5-2-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 97 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 04-321-01 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 91 92 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 6, 2019 Samples Submitted: April 26, 2019 Laboratory Reference: 1904-305 Project: 102225-001 TOTAL ARSENIC EPA 200.8 Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-1-042519 Laboratory ID: 04-305-01 Arsenic 26 3.3 EPA 200.8 4-26-19 4-26-19 Client ID: MW-2-042519 Laboratory ID: 04-305-02 Arsenic 43 3.3 EPA 200.8 4-26-19 4-26-19 Client ID: MW-3-042519 Laboratory ID: 04-305-03 Arsenic 12 3.3 EPA 200.8 4-26-19 4-26-19 Client ID: MW-102-042519 Laboratory ID: 04-305-04 Arsenic 41 3.3 EPA 200.8 4-26-19 4-26-19 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 6, 2019 Samples Submitted: April 26, 2019 Laboratory Reference: 1904-305 Project: 102225-001 TOTAL ARSENIC EPA 200.8 QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0426WM1 Arsenic ND 3.3 EPA 200.8 4-26-19 4-26-19 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 04-296-01 ORIG DUP Arsenic ND ND NA NA NA NA NA 20 MATRIX SPIKES Laboratory ID: 04-296-01 MS MSD MS MSD MS MSD Arsenic 116 114 111 111 ND 105 103 75-125 1 20 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 6, 2019 Samples Submitted: April 26, 2019 Laboratory Reference: 1904-305 Project: 102225-001 DISSOLVED ARSENIC EPA 200.8 Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-1-042519 Laboratory ID: 04-305-01 Arsenic 8.8 3.0 EPA 200.8 4-26-19 4-26-19 Client ID: MW-2-042519 Laboratory ID: 04-305-02 Arsenic 13 3.0 EPA 200.8 4-26-19 4-26-19 Client ID: MW-3-042519 Laboratory ID: 04-305-03 Arsenic 4.5 3.0 EPA 200.8 4-26-19 4-26-19 Client ID: MW-102-042519 Laboratory ID: 04-305-04 Arsenic 16 3.0 EPA 200.8 4-26-19 4-26-19 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 6, 2019 Samples Submitted: April 26, 2019 Laboratory Reference: 1904-305 Project: 102225-001 DISSOLVED ARSENIC EPA 200.8 QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0426F1 Arsenic ND 3.0 EPA 200.8 4-26-19 4-26-19 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 04-268-03 ORIG DUP Arsenic ND ND NA NA NA NA NA 20 MATRIX SPIKES Laboratory ID: 04-268-03 MS MSD MS MSD MS MSD Arsenic 71.4 72.4 80.0 80.0 ND 89 91 75-125 1 20 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 May 13, 2019 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 102225-001 Laboratory Reference No. 1905-056 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on May 3, 2019. Please note that the data for the subcontracted analyses will follow in the final report. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 Case Narrative Samples were collected on May 2 and 3, 2019 and received by the laboratory on May 3, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-6:8 Laboratory ID: 05-056-03 Gasoline ND 5.6 NWTPH-Gx 5-10-19 5-10-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 88 58-129 Client ID: MW-4:11.5 Laboratory ID: 05-056-06 Hexane ND 0.33 NWTPH-VPH 5-10-19 5-10-19 Gasoline ND 6.6 NWTPH-Gx 5-10-19 5-10-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 90 58-129 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0510S1 Hexane ND 0.25 NWTPH-VPH 5-10-19 5-10-19 Gasoline ND 5.0 NWTPH-Gx 5-10-19 5-10-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 89 58-129 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 05-056-06 ORIG DUP Hexane ND ND NA NA NA NA NA 30 Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 90 89 58-129 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-5:6.5 Laboratory ID: 05-056-01 Diesel Range Organics ND 28 NWTPH-Dx 5-6-19 5-6-19 Lube Oil Range Organics 86 55 NWTPH-Dx 5-6-19 5-6-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 79 50-150 Client ID: MW-5:14 Laboratory ID: 05-056-02 Diesel Range Organics ND 33 NWTPH-Dx 5-7-19 5-8-19 Lube Oil Range Organics ND 66 NWTPH-Dx 5-7-19 5-8-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 85 50-150 Client ID: MW-6:8 Laboratory ID: 05-056-03 Diesel Range Organics ND 27 NWTPH-Dx 5-6-19 5-6-19 Lube Oil Range Organics 130 54 NWTPH-Dx 5-6-19 5-6-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 78 50-150 Client ID: MW-6:14 Laboratory ID: 05-056-04 Diesel Range Organics ND 27 NWTPH-Dx 5-6-19 5-6-19 Lube Oil Range Organics ND 54 NWTPH-Dx 5-6-19 5-6-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 84 50-150 Client ID: MW-7:8.5 Laboratory ID: 05-056-05 Diesel Range Organics ND 36 NWTPH-Dx 5-7-19 5-8-19 Lube Oil Range Organics ND 73 NWTPH-Dx 5-7-19 5-8-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 Client ID: MW-4:11.5 Laboratory ID: 05-056-06 Diesel Range Organics ND 240 NWTPH-Dx 5-6-19 5-6-19 U1 Lube Oil Range Organics 1100 61 NWTPH-Dx 5-6-19 5-6-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 73 50-150 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-4:16 Laboratory ID: 05-056-07 Diesel Range Organics ND 39 NWTPH-Dx 5-7-19 5-8-19 Lube Oil Range Organics ND 79 NWTPH-Dx 5-7-19 5-8-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 64 50-150 Client ID: DUP-1 Laboratory ID: 05-056-08 Diesel Range Organics ND 40 NWTPH-Dx 5-7-19 5-8-19 Lube Oil Range Organics ND 79 NWTPH-Dx 5-7-19 5-8-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 63 50-150 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0506S2 Diesel Range Organics ND 25 NWTPH-Dx 5-6-19 5-6-19 Lube Oil Range Organics ND 50 NWTPH-Dx 5-6-19 5-6-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 86 50-150 Laboratory ID: MB0507S1 Diesel Range Organics ND 25 NWTPH-Dx 5-7-19 5-7-19 Lube Oil Range Organics ND 50 NWTPH-Dx 5-7-19 5-7-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 80 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 05-056-01 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range Organics 78.0 60.7 NA NA NA NA 25 NA Surrogate: o-Terphenyl 79 93 50-150 Laboratory ID: SB0507S1 ORIG DUP Diesel Fuel #2 95.4 81.5 NA NA NA NA 16 NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 95 87 50-150 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE ORGANICS EPA 8260C page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-6:8 Laboratory ID: 05-056-03 Dichlorodifluoromethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Chloromethane ND 0.0047 EPA 8260C 5-6-19 5-6-19 Vinyl Chloride ND 0.00094 EPA 8260C 5-6-19 5-6-19 Bromomethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Chloroethane ND 0.0047 EPA 8260C 5-6-19 5-6-19 Trichlorofluoromethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,1-Dichloroethene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Acetone ND 0.0094 EPA 8260C 5-6-19 5-6-19 Iodomethane ND 0.0047 EPA 8260C 5-6-19 5-6-19 Carbon Disulfide ND 0.00094 EPA 8260C 5-6-19 5-6-19 Methylene Chloride ND 0.0047 EPA 8260C 5-6-19 5-6-19 (trans) 1,2-Dichloroethene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Methyl t-Butyl Ether ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,1-Dichloroethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Vinyl Acetate ND 0.0047 EPA 8260C 5-6-19 5-6-19 2,2-Dichloropropane ND 0.00094 EPA 8260C 5-6-19 5-6-19 (cis) 1,2-Dichloroethene ND 0.00094 EPA 8260C 5-6-19 5-6-19 2-Butanone ND 0.0047 EPA 8260C 5-6-19 5-6-19 Bromochloromethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Chloroform ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,1,1-Trichloroethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Carbon Tetrachloride ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,1-Dichloropropene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Benzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,2-Dichloroethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Trichloroethene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,2-Dichloropropane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Dibromomethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Bromodichloromethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 2-Chloroethyl Vinyl Ether ND 0.0047 EPA 8260C 5-6-19 5-6-19 (cis) 1,3-Dichloropropene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Methyl Isobutyl Ketone ND 0.0047 EPA 8260C 5-6-19 5-6-19 Toluene ND 0.0047 EPA 8260C 5-6-19 5-6-19 (trans) 1,3-Dichloropropene ND 0.00094 EPA 8260C 5-6-19 5-6-19 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE ORGANICS EPA 8260C page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-6:8 Laboratory ID: 05-056-03 1,1,2-Trichloroethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Tetrachloroethene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,3-Dichloropropane ND 0.00094 EPA 8260C 5-6-19 5-6-19 2-Hexanone ND 0.0047 EPA 8260C 5-6-19 5-6-19 Dibromochloromethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,2-Dibromoethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Chlorobenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,1,1,2-Tetrachloroethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 Ethylbenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 m,p-Xylene ND 0.0047 EPA 8260C 5-6-19 5-6-19 o-Xylene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Styrene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Bromoform ND 0.0047 EPA 8260C 5-6-19 5-6-19 Isopropylbenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Bromobenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,1,2,2-Tetrachloroethane ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,2,3-Trichloropropane ND 0.00094 EPA 8260C 5-6-19 5-6-19 n-Propylbenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 2-Chlorotoluene ND 0.00094 EPA 8260C 5-6-19 5-6-19 4-Chlorotoluene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,3,5-Trimethylbenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 tert-Butylbenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,2,4-Trimethylbenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 sec-Butylbenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,3-Dichlorobenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 p-Isopropyltoluene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,4-Dichlorobenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,2-Dichlorobenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 n-Butylbenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,2-Dibromo-3-chloropropane ND 0.0047 EPA 8260C 5-6-19 5-6-19 1,2,4-Trichlorobenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Hexachlorobutadiene ND 0.0047 EPA 8260C 5-6-19 5-6-19 Naphthalene ND 0.00094 EPA 8260C 5-6-19 5-6-19 1,2,3-Trichlorobenzene ND 0.00094 EPA 8260C 5-6-19 5-6-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 104 76-131 Toluene-d8 99 78-128 4-Bromofluorobenzene 98 71-130 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE ORGANICS EPA 8260C page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-4:11.5 Laboratory ID: 05-056-06 Dichlorodifluoromethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Chloromethane ND 0.0057 EPA 8260C 5-6-19 5-6-19 Vinyl Chloride ND 0.0011 EPA 8260C 5-6-19 5-6-19 Bromomethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Chloroethane ND 0.0057 EPA 8260C 5-6-19 5-6-19 Trichlorofluoromethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,1-Dichloroethene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Acetone 0.039 0.011 EPA 8260C 5-6-19 5-6-19 Iodomethane ND 0.0057 EPA 8260C 5-6-19 5-6-19 Carbon Disulfide ND 0.0011 EPA 8260C 5-6-19 5-6-19 Methylene Chloride ND 0.0057 EPA 8260C 5-6-19 5-6-19 (trans) 1,2-Dichloroethene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Methyl t-Butyl Ether ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,1-Dichloroethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Vinyl Acetate ND 0.0057 EPA 8260C 5-6-19 5-6-19 2,2-Dichloropropane ND 0.0011 EPA 8260C 5-6-19 5-6-19 (cis) 1,2-Dichloroethene ND 0.0011 EPA 8260C 5-6-19 5-6-19 2-Butanone 0.0098 0.0057 EPA 8260C 5-6-19 5-6-19 Bromochloromethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Chloroform ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,1,1-Trichloroethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Carbon Tetrachloride ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,1-Dichloropropene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Benzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,2-Dichloroethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Trichloroethene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,2-Dichloropropane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Dibromomethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Bromodichloromethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 2-Chloroethyl Vinyl Ether ND 0.0057 EPA 8260C 5-6-19 5-6-19 (cis) 1,3-Dichloropropene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Methyl Isobutyl Ketone ND 0.0057 EPA 8260C 5-6-19 5-6-19 Toluene ND 0.0057 EPA 8260C 5-6-19 5-6-19 (trans) 1,3-Dichloropropene ND 0.0011 EPA 8260C 5-6-19 5-6-19 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE ORGANICS EPA 8260C page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-4:11.5 Laboratory ID: 05-056-06 1,1,2-Trichloroethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Tetrachloroethene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,3-Dichloropropane ND 0.0011 EPA 8260C 5-6-19 5-6-19 2-Hexanone ND 0.0057 EPA 8260C 5-6-19 5-6-19 Dibromochloromethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,2-Dibromoethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Chlorobenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,1,1,2-Tetrachloroethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 Ethylbenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 m,p-Xylene ND 0.0057 EPA 8260C 5-6-19 5-6-19 o-Xylene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Styrene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Bromoform ND 0.0057 EPA 8260C 5-6-19 5-6-19 Isopropylbenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Bromobenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,1,2,2-Tetrachloroethane ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,2,3-Trichloropropane ND 0.0011 EPA 8260C 5-6-19 5-6-19 n-Propylbenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 2-Chlorotoluene ND 0.0011 EPA 8260C 5-6-19 5-6-19 4-Chlorotoluene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,3,5-Trimethylbenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 tert-Butylbenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,2,4-Trimethylbenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 sec-Butylbenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,3-Dichlorobenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 p-Isopropyltoluene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,4-Dichlorobenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,2-Dichlorobenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 n-Butylbenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,2-Dibromo-3-chloropropane ND 0.0057 EPA 8260C 5-6-19 5-6-19 1,2,4-Trichlorobenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Hexachlorobutadiene ND 0.0057 EPA 8260C 5-6-19 5-6-19 Naphthalene ND 0.0011 EPA 8260C 5-6-19 5-6-19 1,2,3-Trichlorobenzene ND 0.0011 EPA 8260C 5-6-19 5-6-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 102 76-131 Toluene-d8 98 78-128 4-Bromofluorobenzene 95 71-130 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE ORGANICS EPA 8260C METHOD BLANK QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0506S2 Dichlorodifluoromethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Chloromethane ND 0.0050 EPA 8260C 5-6-19 5-6-19 Vinyl Chloride ND 0.0010 EPA 8260C 5-6-19 5-6-19 Bromomethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Chloroethane ND 0.0050 EPA 8260C 5-6-19 5-6-19 Trichlorofluoromethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,1-Dichloroethene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Acetone ND 0.010 EPA 8260C 5-6-19 5-6-19 Iodomethane ND 0.0050 EPA 8260C 5-6-19 5-6-19 Carbon Disulfide ND 0.0010 EPA 8260C 5-6-19 5-6-19 Methylene Chloride ND 0.0050 EPA 8260C 5-6-19 5-6-19 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Methyl t-Butyl Ether ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,1-Dichloroethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Vinyl Acetate ND 0.0050 EPA 8260C 5-6-19 5-6-19 2,2-Dichloropropane ND 0.0010 EPA 8260C 5-6-19 5-6-19 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260C 5-6-19 5-6-19 2-Butanone ND 0.0050 EPA 8260C 5-6-19 5-6-19 Bromochloromethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Chloroform ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,1,1-Trichloroethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Carbon Tetrachloride ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,1-Dichloropropene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Benzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,2-Dichloroethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Trichloroethene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,2-Dichloropropane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Dibromomethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Bromodichloromethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260C 5-6-19 5-6-19 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Methyl Isobutyl Ketone ND 0.0050 EPA 8260C 5-6-19 5-6-19 Toluene ND 0.0050 EPA 8260C 5-6-19 5-6-19 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260C 5-6-19 5-6-19 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE ORGANICS EPA 8260C METHOD BLANK QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0506S2 1,1,2-Trichloroethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Tetrachloroethene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,3-Dichloropropane ND 0.0010 EPA 8260C 5-6-19 5-6-19 2-Hexanone ND 0.0050 EPA 8260C 5-6-19 5-6-19 Dibromochloromethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,2-Dibromoethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Chlorobenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 Ethylbenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 m,p-Xylene ND 0.0050 EPA 8260C 5-6-19 5-6-19 o-Xylene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Styrene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Bromoform ND 0.0050 EPA 8260C 5-6-19 5-6-19 Isopropylbenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Bromobenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,2,3-Trichloropropane ND 0.0010 EPA 8260C 5-6-19 5-6-19 n-Propylbenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 2-Chlorotoluene ND 0.0010 EPA 8260C 5-6-19 5-6-19 4-Chlorotoluene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 tert-Butylbenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 sec-Butylbenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,3-Dichlorobenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 p-Isopropyltoluene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,4-Dichlorobenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,2-Dichlorobenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 n-Butylbenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260C 5-6-19 5-6-19 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Hexachlorobutadiene ND 0.0050 EPA 8260C 5-6-19 5-6-19 Naphthalene ND 0.0010 EPA 8260C 5-6-19 5-6-19 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260C 5-6-19 5-6-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 103 76-131 Toluene-d8 100 78-128 4-Bromofluorobenzene 100 71-130 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE ORGANICS EPA 8260C SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0506S2 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0507 0.0517 0.0500 0.0500 101 103 57-133 2 18 Benzene 0.0489 0.0500 0.0500 0.0500 98 100 71-129 2 16 Trichloroethene 0.0520 0.0514 0.0500 0.0500 104 103 71-122 1 16 Toluene 0.0515 0.0506 0.0500 0.0500 103 101 74-125 2 15 Chlorobenzene 0.0530 0.0526 0.0500 0.0500 106 105 72-120 1 14 Surrogate: Dibromofluoromethane 101 100 76-131 Toluene-d8 101 99 78-128 4-Bromofluorobenzene 100 96 71-130 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-6:8 Laboratory ID: 05-056-03 Naphthalene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 2-Methylnaphthalene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 1-Methylnaphthalene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Acenaphthylene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Acenaphthene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Fluorene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Phenanthrene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Anthracene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Fluoranthene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Pyrene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Benzo[a]anthracene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Chrysene 0.010 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Benzo[b]fluoranthene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Benzo(j,k)fluoranthene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Benzo[a]pyrene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Indeno(1,2,3-c,d)pyrene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Dibenz[a,h]anthracene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Benzo[g,h,i]perylene ND 0.0072 EPA 8270D/SIM 5-7-19 5-7-19 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 80 40 - 111 Pyrene-d10 82 40 - 110 Terphenyl-d14 79 45 - 122 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 PAHs EPA 8270D/SIM Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-4:11.5 Laboratory ID: 05-056-06 Naphthalene ND 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 2-Methylnaphthalene ND 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 1-Methylnaphthalene ND 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 Acenaphthylene ND 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 Acenaphthene 0.0084 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 Fluorene ND 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 Phenanthrene ND 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 Anthracene ND 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 Fluoranthene ND 0.0082 EPA 8270D/SIM 5-7-19 5-7-19 Pyrene ND 0.014 EPA 8270D/SIM 5-7-19 5-7-19 U1 Benzo[a]anthracene ND 0.041 EPA 8270D/SIM 5-7-19 5-8-19 Chrysene ND 0.041 EPA 8270D/SIM 5-7-19 5-8-19 Benzo[b]fluoranthene ND 0.041 EPA 8270D/SIM 5-7-19 5-8-19 Benzo(j,k)fluoranthene ND 0.041 EPA 8270D/SIM 5-7-19 5-8-19 Benzo[a]pyrene ND 0.041 EPA 8270D/SIM 5-7-19 5-8-19 Indeno(1,2,3-c,d)pyrene ND 0.041 EPA 8270D/SIM 5-7-19 5-8-19 Dibenz[a,h]anthracene ND 0.041 EPA 8270D/SIM 5-7-19 5-8-19 Benzo[g,h,i]perylene ND 0.041 EPA 8270D/SIM 5-7-19 5-8-19 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 69 40 - 111 Pyrene-d10 109 40 - 110 Terphenyl-d14 92 45 - 122 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 PAHs EPA 8270D/SIM METHOD BLANK QUALITY CONTROL Matrix: Soil Units: mg/Kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0507S2 Naphthalene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 2-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 1-Methylnaphthalene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Acenaphthylene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Acenaphthene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Fluorene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Phenanthrene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Anthracene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Fluoranthene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Pyrene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Benzo[a]anthracene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Chrysene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Benzo[b]fluoranthene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Benzo(j,k)fluoranthene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Benzo[a]pyrene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Indeno(1,2,3-c,d)pyrene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Dibenz[a,h]anthracene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Benzo[g,h,i]perylene ND 0.0067 EPA 8270D/SIM 5-7-19 5-7-19 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 91 40 - 111 Pyrene-d10 101 40 - 110 Terphenyl-d14 85 45 - 122 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 PAHs EPA 8270D/SIM SB/SBD QUALITY CONTROL Matrix: Soil Units: mg/Kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0507S2 SB SBD SB SBD SB SBD Naphthalene 0.0699 0.0647 0.0833 0.0833 84 78 57 - 109 8 15 Acenaphthylene 0.0703 0.0680 0.0833 0.0833 84 82 60 - 121 3 15 Acenaphthene 0.0701 0.0684 0.0833 0.0833 84 82 59 - 121 2 15 Fluorene 0.0722 0.0704 0.0833 0.0833 87 85 63 - 119 3 15 Phenanthrene 0.0714 0.0692 0.0833 0.0833 86 83 59 - 114 3 15 Anthracene 0.0728 0.0708 0.0833 0.0833 87 85 63 - 119 3 15 Fluoranthene 0.0673 0.0691 0.0833 0.0833 81 83 63 - 120 3 15 Pyrene 0.0702 0.0675 0.0833 0.0833 84 81 62 - 119 4 15 Benzo[a]anthracene 0.0753 0.0723 0.0833 0.0833 90 87 64 - 127 4 15 Chrysene 0.0740 0.0715 0.0833 0.0833 89 86 63 - 121 3 15 Benzo[b]fluoranthene 0.0703 0.0726 0.0833 0.0833 84 87 61 - 122 3 15 Benzo(j,k)fluoranthene 0.0709 0.0664 0.0833 0.0833 85 80 64 - 123 7 15 Benzo[a]pyrene 0.0722 0.0708 0.0833 0.0833 87 85 62 - 122 2 15 Indeno(1,2,3-c,d)pyrene 0.0872 0.0780 0.0833 0.0833 105 94 59 - 124 11 15 Dibenz[a,h]anthracene 0.0871 0.0770 0.0833 0.0833 105 92 61 - 123 12 15 Benzo[g,h,i]perylene 0.0896 0.0800 0.0833 0.0833 108 96 61 - 119 11 15 Surrogate: 2-Fluorobiphenyl 86 85 40 - 111 Pyrene-d10 85 83 40 - 110 Terphenyl-d14 87 87 45 - 122 19 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 TOTAL ORGANIC CARBON EPA 9060A Matrix: Soil Units: % Carbon Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-5:14 Laboratory ID: 05-056-02 Total Organic Carbon 0.17 0.051 EPA 9060A 5-13-19 5-13-19 Client ID: MW-6:14 Laboratory ID: 05-056-04 Total Organic Carbon 0.68 0.076 EPA 9060A 5-13-19 5-13-19 20 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 TOTAL ORGANIC CARBON EPA 9060A QUALITY CONTROL Matrix: Soil Units: % Carbon Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0513S1 Total Organic Carbon ND 0.042 EPA 9060A 5-13-19 5-13-19 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 05-056-02 ORIG DUP Total Organic Carbon 0.170 0.169 NA NA NA NA 0 26 SPIKE BLANK Laboratory ID: SB0513S1 SB SB SB Total Organic Carbon 43.4 42.1 NA 103 94-123 NA NA 21 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE PETROLEUM HYDROCARBONS Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-4:11.5 Laboratory ID: 05-056-06 Aliphatic C5-C6 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aliphatic C6-C8 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aliphatic C8-C10 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aliphatic C10-C12 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Total Aliphatic: NA NWTPH-VPH 5-10-19 5-10-19 Aromatic C8-C10 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aromatic C10-C12 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aromatic C12-C13 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Total Aromatic: NA NWTPH-VPH 5-10-19 5-10-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 90 60-129 22 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE PETROLEUM HYDROCARBONS METHOD BLANK QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Laboratory ID: MB0510S1 Aliphatic C5-C6 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aliphatic C6-C8 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aliphatic C8-C10 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aliphatic C10-C12 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Total Aliphatic: NA NWTPH-VPH 5-10-19 5-10-19 Aromatic C8-C10 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aromatic C10-C12 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Aromatic C12-C13 ND 5.0 NWTPH-VPH 5-10-19 5-10-19 Total Aromatic: NA NWTPH-VPH 5-10-19 5-10-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 89 60-129 23 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 VOLATILE PETROLEUM HYDROCARBONS DUPLICATE QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 05-056-06 ORIG DUP Aliphatic C5-C6 ND ND NA NA NA NA NA 30 Aliphatic C6-C8 ND ND NA NA NA NA NA 30 Aliphatic C8-C10 ND ND NA NA NA NA NA 30 Aliphatic C10-C12 ND ND NA NA NA NA NA 30 Total Aliphatic: NA NA NA NA NA NA NA 30 24 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 13, 2019 Samples Submitted: May 3, 2019 Laboratory Reference: 1905-056 Project: 102225-001 % MOISTURE Date Analyzed: 5-6-19 Client ID Lab ID % Moisture MW-5:6.5 05-056-01 9 MW-5:14 05-056-02 24 MW-6:8 05-056-03 8 MW-6:14 05-056-04 8 MW-7:8.5 05-056-05 31 MW-4:11.5 05-056-06 19 MW-4:16 05-056-07 36 DUP-1 05-056-08 37 25 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 • (425) 883-3881 June 3, 2019 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 102225-001 Laboratory Reference No. 1905-056B Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on May 3, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures !" # $ %& ' &(&& ) )% * &%&( & )&( ") + ( , ) *&&- ) ( ./&0% *&&% ' *) ) +&)( 0% *&&% ' " * &("& ) " &, )) -,* * ) " )) ) 1 , *%) & 2% (&%,&% " - "%*%" *2%&& ) ,&) &(( %& *% 34% && 5 6&7&& #8#6&7 3 !9 (*" "& ) 5 .&) -"" & &(" ,"" * ( )&&( " " "& "&! , * (&" " ) &%&( -""& & " 2% &(" .,*&( ( *&& & :) &&%"& ) &(" "&" )* ) 5 ." &, %" ;,*"1 , *< . 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"&8 " ::'*8 * &% & Page 11 of 12 19E0396 ARISample FINAL 03 Jun 2019 1444 ' + ' +!%, ' +< . !" ?@ # $ %& 34% E E- &:E B"& *& , " ) .617 ( , "(61#7H ) &%& ) *-.", && ' #(( '# * !) ! *!B#B=B# , " ) .!# *#B=B##B ?=@ &"& &%- &2% ("&% % % *&& Page 12 of 12 19E0396 ARISample FINAL 03 Jun 2019 1444 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 May 20, 2019 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 102225-001 Laboratory Reference No. 1905-163 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on May 10, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 20, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163 Project: 102225-001 Case Narrative Samples were collected on May 9, 2019 and received by the laboratory on May 10, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 20, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-4-050919 Laboratory ID: 05-163-01 Diesel Range Organics 0.92 0.26 NWTPH-Dx 5-15-19 5-16-19 Lube Oil Range Organics ND 0.41 NWTPH-Dx 5-15-19 5-16-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 84 50-150 Client ID: MW-5-050919 Laboratory ID: 05-163-02 Diesel Range Organics ND 0.26 NWTPH-Dx 5-15-19 5-16-19 Lube Oil Range Organics ND 0.42 NWTPH-Dx 5-15-19 5-16-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 85 50-150 Client ID: MW-5-050919 Laboratory ID: 05-163-02 Diesel Range Organics ND 0.26 NWTPH-Dx 5-15-19 5-16-19 X1 Lube Oil Range Organics ND 0.42 NWTPH-Dx 5-15-19 5-16-19 X1 Surrogate: Percent Recovery Control Limits o-Terphenyl 103 50-150 Client ID: MW-6-050919 Laboratory ID: 05-163-03 Diesel Range Organics ND 0.26 NWTPH-Dx 5-15-19 5-16-19 Lube Oil Range Organics ND 0.41 NWTPH-Dx 5-15-19 5-16-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 94 50-150 Client ID: MW-7-050919 Laboratory ID: 05-163-04 Diesel Range Organics 0.34 0.26 NWTPH-Dx 5-15-19 5-16-19 Lube Oil Range Organics 0.49 0.42 NWTPH-Dx 5-15-19 5-16-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 88 50-150 Client ID: MW-104-050919 Laboratory ID: 05-163-05 Diesel Range Organics 0.99 0.26 NWTPH-Dx 5-15-19 5-16-19 Lube Oil Range Organics 0.63 0.41 NWTPH-Dx 5-15-19 5-16-19 N1 Surrogate: Percent Recovery Control Limits o-Terphenyl 91 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 20, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163 Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0515W1 Diesel Range Organics ND 0.25 NWTPH-Dx 5-15-19 5-16-19 Lube Oil Range Organics ND 0.40 NWTPH-Dx 5-15-19 5-16-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 78 50-150 Laboratory ID: MB0515W1 Diesel Range Organics ND 0.25 NWTPH-Dx 5-15-19 5-16-19 X1 Lube Oil Range Organics ND 0.40 NWTPH-Dx 5-15-19 5-16-19 X1 Surrogate: Percent Recovery Control Limits o-Terphenyl 95 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB0515W1 ORIG DUP Diesel Fuel #2 0.757 0.715 NA NA NA NA 6 NA Surrogate: o-Terphenyl 82 82 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 20, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163 Project: 102225-001 TOTAL ARSENIC EPA 200.8 Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-4-050919 Laboratory ID: 05-163-01 Arsenic 7.4 3.3 EPA 200.8 5-14-19 5-14-19 Client ID: MW-5-050919 Laboratory ID: 05-163-02 Arsenic 21 3.3 EPA 200.8 5-14-19 5-14-19 Client ID: MW-6-050919 Laboratory ID: 05-163-03 Arsenic 7.0 3.3 EPA 200.8 5-14-19 5-14-19 Client ID: MW-7-050919 Laboratory ID: 05-163-04 Arsenic 22 3.3 EPA 200.8 5-14-19 5-14-19 Client ID: MW-104-050919 Laboratory ID: 05-163-05 Arsenic 7.8 3.3 EPA 200.8 5-14-19 5-14-19 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 20, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163 Project: 102225-001 TOTAL ARSENIC EPA 200.8 QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0514WM1 Arsenic ND 3.3 EPA 200.8 5-14-19 5-14-19 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 05-172-01 ORIG DUP Arsenic ND ND NA NA NA NA NA 20 MATRIX SPIKES Laboratory ID: 05-172-01 MS MSD MS MSD MS MSD Arsenic 137 137 111 111 ND 124 124 75-125 0 20 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 20, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163 Project: 102225-001 DISSOLVED ARSENIC EPA 200.8 Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-4-050919 Laboratory ID: 05-163-01 Arsenic 3.5 3.0 EPA 200.8 5-10-19 5-14-19 Client ID: MW-5-050919 Laboratory ID: 05-163-02 Arsenic 10 3.0 EPA 200.8 5-10-19 5-14-19 Client ID: MW-6-050919 Laboratory ID: 05-163-03 Arsenic 5.0 3.0 EPA 200.8 5-10-19 5-14-19 Client ID: MW-7-050919 Laboratory ID: 05-163-04 Arsenic 13 3.0 EPA 200.8 5-10-19 5-14-19 Client ID: MW-104-050919 Laboratory ID: 05-163-05 Arsenic ND 3.0 EPA 200.8 5-10-19 5-14-19 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: May 20, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163 Project: 102225-001 DISSOLVED ARSENIC EPA 200.8 QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0510F1 Arsenic ND 3.0 EPA 200.8 5-10-19 5-14-19 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 05-163-05 ORIG DUP Arsenic ND ND NA NA NA NA NA 20 MATRIX SPIKES Laboratory ID: 05-163-05 MS MSD MS MSD MS MSD Arsenic 86.6 88.0 80.0 80.0 ND 108 110 75-125 2 20 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 • (425) 883-3881 June 3, 2019 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 102225-001 Laboratory Reference No. 1905-163B Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on May 10, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: June 3, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163B Project: 102225-001 Case Narrative Samples were collected on May 9, 2019 and received by the laboratory on May 10, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: June 3, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163B Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-7-050919 Laboratory ID: 05-163-04 Diesel Range Organics ND 0.26 NWTPH-Dx 5-15-19 5-31-19 X1 Lube Oil Range Organics ND 0.42 NWTPH-Dx 5-15-19 5-31-19 X1 Surrogate: Percent Recovery Control Limits o-Terphenyl 99 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: June 3, 2019 Samples Submitted: May 10, 2019 Laboratory Reference: 1905-163B Project: 102225-001 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0515W1 Diesel Range Organics ND 0.25 NWTPH-Dx 5-15-19 5-16-19 X1 Lube Oil Range Organics ND 0.40 NWTPH-Dx 5-15-19 5-16-19 X1 Surrogate: Percent Recovery Control Limits o-Terphenyl 95 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB0515W1 ORIG DUP Diesel Fuel #2 0.757 0.715 NA NA NA NA 6 NA Surrogate: o-Terphenyl 82 82 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in method 8260C, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 II-iIMPORTANT INFORMATIONImportant InformationImportant Information About Your Environmental Site Assessment/Evaluation Report Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 II-1IMPORTANT INFORMATIONENVIRONMENTAL SITE ASSESSMENTS/EVALUATIONS ARE PERFORMED FOR SPECIFIC PURPOSES AND FOR SPECIFIC CLIENTS. This report was prepared to meet the needs you specified with respect to your specific site and your risk management preferences. Unless indicated otherwise, we prepared your report expressly for you and for the purposes you indicated. No one other than you should use this report for any purpose without first conferring with us. No one is authorized to use this report for any purpose other than that originally contemplated without our prior written consent. The findings and conclusions documented in this site assessment/evaluation have been prepared for specific application to this project and have been developed in a manner consistent with that level of care and skill normally exercised by members of the environmental science profession currently practicing under similar conditions in this area. The conclusions presented are based on interpretation of information currently available to us and are made within the operational scope, budget, and schedule constraints of this project. No warranty, express or implied, is made. OUR REPORT IS BASED ON PROJECT-SPECIFIC FACTORS. Our environmental site assessment is based on several factors and may include (but not be limited to) reviewing public documents to chronicle site ownership for the past 30, 40, or more years; investigating the site’s regulatory history to learn about permits granted or citations issued; determining prior uses of the site and those adjacent to it; reviewing available topographic and real estate maps, historical aerial photos, geologic information, and hydrologic data; reviewing readily available published information about surface and subsurface conditions; reviewing federal and state lists of known and potentially contaminated sites; evaluating the potential for naturally occurring hazards; and interviewing public officials, owners/operators, and/or adjacent owners with respect to local concerns and environmental conditions. Except as noted within the text of the report, no sampling or quantitative laboratory testing was performed by us as part of this site assessment. Where such analyses were conducted by an outside laboratory, Shannon & Wilson relied upon the data provided and did not conduct an independent evaluation regarding the reliability of the data. CONDITIONS CAN CHANGE. Site conditions, both surface and subsurface, may be affected as a result of natural processes or human influence. An environmental site assessment/evaluation is based on conditions that existed at the time of the evaluation. Because so many aspects of a historical review rely on third-party information, most consultants will refuse to certify (warrant) that a site is free of contaminants, as it is impossible to know with absolute certainty if such a condition exists. Contaminants may be present in areas that were not surveyed or sampled or may migrate to areas that showed no signs of contamination at the time they were studied. Unless your consultant indicates otherwise, your report should not be construed to represent geotechnical subsurface conditions at or adjacent to the site and does not provide sufficient information for construction-related activities. Your report also should not be used following floods, earthquakes, or other acts of nature; if the size or configuration of the site is altered; if the location of the site is modified; or if there is a change of ownership and/or use of the property. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Supplemental Environmental Site Assessment 102225-001 June 28, 2019 II-2IMPORTANT INFORMATIONINCIDENTAL DAMAGE MAY OCCUR DURING SAMPLING ACTIVITIES. Incidental damage to a facility may occur during sampling activities. Asbestos and lead-based paint sampling often require destructive sampling of pipe insulation, floor tile, walls, doors, ceiling tile, roofing, and other building materials. Shannon & Wilson does not provide for paint repair. Limited repair of asbestos sample locations is provided. However, Shannon & Wilson neither warranties repairs made by our field personnel, nor are we held liable for injuries or damages as a result of those repairs. If you desire a specific form of repair, such as those provided by a licensed roofing contractor, you need to request the specific repair at the time of the proposal. The owner is responsible for repair methods that are not specified in the proposal. READ RESPONSIBILITY CLAUSES CAREFULLY. Environmental site assessments/evaluations are less exact than other design disciplines because they are based extensively on judgment and opinion and there may not have been any (or very limited) investigation of actual subsurface conditions. Wholly unwarranted claims have been lodged against consultants. To limit this exposure, consultants have developed a number of clauses for use in their contracts, reports, and other documents. These responsibility clauses are not exculpatory clauses designed to transfer the consultant’s liabilities to other parties; rather, they are definitive clauses that identify where responsibilities begin and end. Their use helps all parties involved recognize their individual responsibilities and take appropriate action. Some of these definitive clauses may appear in this report, and you are encouraged to read them closely. Your consultant will be pleased to give full and frank answers to your questions. Consultants cannot accept responsibility for problems that may develop if they are not consulted after factors considered in their reports have changed or conditions at the site have changed. Therefore, it is incumbent upon you to notify your consultant of any factors that may have changed prior to submission of the final assessment/evaluation. An assessment/evaluation of a site helps reduce your risk but does not eliminate it. Even the most rigorous professional assessment may fail to identify all existing conditions. ONE OF THE OBLIGATIONS OF YOUR CONSULTANT IS TO PROTECT THE SAFETY, HEALTH, PROPERTY, AND WELFARE OF THE PUBLIC. If our environmental site assessment/evaluation discloses the existence of conditions that may endanger the safety, health, property, or welfare of the public, we may be obligated under rules of professional conduct, statutory law, or common law to notify you and others of these conditions. The preceding paragraphs are based on information provided by the ASFE/Association of Engineering Firms Practicing in the Geosciences, Silver Spring, Maryland 400 North 34th Street Suite 100 PO Box 300303 Seattle, Washington 98103 206 632-8020 Fax 206 695-6777 TTY 1 800 833 6388 www.shannonwilson.com December 9, 2021 Mr. Ross Stainsby Sound Transit 401 S Jackson Street Seattle, WA 98104-2826 RE: ENVIRONMENTAL LETTER REPORT, SOUTH RENTON TRANSIT CENTER, 750 RAINIER AVENUE S AND 200 S GRADY WAY, RENTON, WASHINGTON Dear Mr. Stainsby: Shannon & Wilson has completed this Environmental Letter Report for the South Renton Transit Center property (site) located at the above-referenced address (Figure 1). The work was conducted in accordance with our proposal dated December 4, 2020, under Sound Transit contract #RTA/OA 0287-19B, Task Order 2. The task order was authorized by Ms. Susan Penoyar and notice to proceed was provided January 20, 2021. This study was conducted to assist Sound Transit’s plans to develop the site as part of the South Renton Transit Center and Roadway Improvements Project. INTRODUCTION Scope of Services Our scope of services included the following tasks: Completion of explorations, including installation of monitoring wells Soil and groundwater sampling and analysis Preparation of this report Project management/administration Design support services are being provided under a separate task order. Mr. Ross Stainsby Sound Transit December 9, 2021 Page 2 of 8 104059-202-L1f.docx//wp/lkn 104059-202 BACKGROUND Site Location and Description The site is in the northwest quarter of the northeast quarter of Section 19, Township 23 North, Range 5 East of the Willamette Meridian (Figure 1). It is comprised of the following four parcels: RTN001 (750 Rainier Avenue S). Consists of 3.43 acres developed as a former auto showroom and shop building used for auto detailing (currently vacant). RTN002 (750 Rainier Avenue S). Consists of 1.98 acres developed as a former auto body shop (currently vacant) and three towers for power transmission lines. RTN003 (200 S Grady Way). Consists of 1.89 acres developed as a used car sales office and service garage at the western end of the parcel (currently vacant), and an active auto parts office and service garage at the eastern end. RTN004 (200 S Grady Way). Consists of 0.99 acres developed as a paved parking. Previous Environmental Studies and Reports Previous site environmental studies completed at the site include two Initial Investigation Field Reports from the Washington State Department of Ecology (Ecology) and three Environmental Site Assessments (ESAs) from Shannon & Wilson. Shannon & Wilson completed a Phase I ESA and Phase II ESA to support Sound Transit due diligence evaluations, and contaminated soil and groundwater were confirmed on site. The Supplemental ESA was prepared for Sound Transit’s legal counsel to support property negotiations. The supplemental investigation plan was developed concurrently with the previous property owner’s environmental consultant and focused on evaluating groundwater flow direction and extent of contamination (and not necessarily remediation design/site characterization). These studies are summarized in Appendix C. Select tables and figures from these studies are also contained in the appendix. GEOLOGIC AND HYDROGEOLOGIC SETTINGS This section describes the general geologic setting of the site vicinity and discusses the subsurface conditions. The geologic and hydrogeologic summaries below are based on a Mr. Ross Stainsby Sound Transit December 9, 2021 Page 3 of 8 104059-202-L1f.docx//wp/lkn 104059-202 review of geologic documents and Shannon & Wilson’s environmental explorations conducted at the site (Shannon & Wilson, 20191 and 20192). Site Geology Subsurface conditions encountered during field investigations included fill underlain by fine-grained and sandy soils. Fill is generally 1 to 2 feet thick across most of the site, except for the southeast corner where fill is 5 to 6 feet thick. Native soil units encountered at the site are consistent with alluvium and low-energy lacustrine deposits of the Cedar River floodplain and the historic Lake Washington shoreline. These units consist of poorly graded sand and poorly graded sand with silt; silty sand; silt with sand; silt; and organic clay. Peat and organic silt/clay were encountered beneath RTN003. Site Hydrogeology Groundwater elevation monitoring conducted in May 2019 documented the depth-to- groundwater was between 6 to 8.5 feet below ground surface (bgs) (Table 1). Groundwater was predominantly confined to the poorly graded sand unit encountered throughout most of the site. A potentiometric map generated from the May 2019 data shows site groundwater flow predominately to the west and southwest with a hydraulic gradient of approximately 0.003 to 0.008 feet per foot (Appendix C, Figure C-3). However, groundwater flow became more southerly towards the westernmost portion of the site. This refraction in flow direction may be associated with increased subsurface compaction near Rainier Avenue South; increased compaction would decrease porosity and permeability of subsurface soils, potentially altering groundwater flow direction. In July 2021, depth to groundwater ranged between 5.7 to 8.3 feet bgs (Table 1), with a similar groundwater flow direction. 1 Shannon & Wilson, 2017, Phase II environmental site assessment, Sound Transit right-of-way #RTN001 through #RTN004, Sound Ford property, 750 Rainier Avenue S. and 200 S. Grady Way, Renton, Washington: report prepared by Shannon & Wilson, Seattle Wash., for Sound Transit, Seattle, Wash., project no. 21-1-16700-301, March 9. 2 Shannon & Wilson, 2019, Supplemental environmental site assessment, Sound Ford Renton (Sound Transit ROW nos. RTN001-RTN004), Renton, Washington: report prepared by Shannon & Wilson, Seattle Wash., for Miller Nash Graham & Dunn LLP, Seattle, Wash., project no. 102225-001, June 28. Mr. Ross Stainsby Sound Transit December 9, 2021 Page 4 of 8 104059-202-L1f.docx//wp/lkn 104059-202 SITE INVESTIGATION Site Coordination As part of the National Environmental Policy Act process, Sound Transit submitted an exploration plan to the Federal Transit Authority (FTA) for review. The plan was multi- disciplined and included this investigation plan as well as those planned under a separate design contract (for geotechnical, archeological, and utility potholing purposes). Explorations could not proceed until receipt of FTA approval. In coordination with the design team, private utility locating was completed by APS Locates of North Bend, Washington, under subcontract to the prime designer. Separately, Shannon & Wilson marked locations and submitted a utility locate request to the Washington Utility Notification Center for our proposed locations. Site access was coordinated with Sound Transit Real Property or security. Holt Services, Inc. of Edgewood, Washington, under subcontract to Shannon & Wilson, used a truck-mounted direct-push probing rig to complete field explorations and well installations. Exploration logs, which indicate soil classifications, estimated depths to water during drilling, and results of field screening for presence of contaminant(s), are provided in Appendix A. Field methodology is also described in Appendix A. A survey of the newly installed monitoring wells (by others) is pending. Field Activities On July 19 and 20, 2021, Shannon & Wilson observed the advancement and sampling of 16 push-probe borings and installation of permanent monitoring wells in four of the borings. The intent of each exploration, its location, and total depth are summarized in Table 2. Exploration locations are shown in Figure 2 and are also discussed in more detail below. Evaluate Potential for Off- to On-Site Migration from the North -Sampling in April 2019 confirmed diesel- and oil-range petroleum contamination in groundwater at MW-1. It is not known whether this contamination is coming onto the property from the adjacent parcel to the north of RTN002. However, it is suspected because of proximity and estimated groundwater flow direction. Two monitoring wells (RTN002-05 and RTN002-06) were installed along the property line, one east and one west of MW-1. Mr. Ross Stainsby Sound Transit December 9, 2021 Page 5 of 8 104059-202-L1f.docx//wp/lkn 104059-202 Fill Data Gaps Between Groundwater Plumes -The north-central area of the site has not been assessed for soil or groundwaterȱ contamination. To evaluate whether a source exists or if two groundwater plumesȱ may be present, we installed two additional monitoring wells (RTN001-12 andȱ RTN001-13) to delineate the known lube oil/diesel contamination in soil and/orȱ groundwater previously identified at sampling locations RTN001-2 and RTN001-3. Parking Lot Hot Spots -Three soil “hot spots” were previously identified at sampling locations RTN001-11,ȱ RTN002-3, and RTN004-1. To evaluate the extent of soil contamination, weȱ completed four additional sampling locations to the north, east, south, and west ofȱ each of these “hot spot” locations. (Note: The southern limiting exploration locationȱ of RTN004-1 would have extended off the site and into the vicinity of a fiber-opticȱ cable utility line; this location was moved north onto the property, to be withinȱ project limits.Ǽ During drilling, a petroleum odor was observed in 12 of the 16 borings. Monitoring wells were developed on July 21, 2021. Groundwater samples were collected on July 22, 2021. Depth to groundwater was also measured on July 22, 2021, in accessible wells, including those previously installed in 2019. Soil descriptions, results of field screening, and other field observations made during drilling are summarized in boring logs contained in Appendix A. Boring logs for explorations completed as groundwater monitoring wells include well construction details and groundwater level measurements. Existing site monitoring wells were not sampled as part of this investigation. Investigation-derived Waste Sampling activities generated investigation-derived waste (IDW) (soil, purge water, and decontamination water). IDW was placed into Washington State Department of Transportation drums, labeled, and left on site, pending receipt of analytical test results. Shannon & Wilson contracted DH Environmental to pick up the drums on September 9, 2021. Final disposal documentation is provided in Appendix D. ANALYTICAL RESULTS Soil and groundwater samples were submitted to OnSite Environmental for analytical testing. Soil and groundwater samples were analyzed for diesel- and oil-range petroleum hydrocarbons by Ecology’s Northwest Total Petroleum Hydrocarbons-Diesel Extended Method. Soil samples were also analyzed for polycyclic aromatic hydrocarbons by U.S. Environmental Protection Agency Method 8270E/SIM. Analytical results are provided in Mr. Ross Stainsby Sound Transit December 9, 2021 Page 6 of 8 104059-202-L1f.docx//wp/lkn 104059-202 Tables 3 through 6, shown graphically in Figure 3, and laboratory reports are included in Appendix B. In general, contaminant of concern concentrations in both soil and groundwater were below Washington Model Toxics Control Act (MTCA) Method A cleanup levels for unrestricted use. Two exceptions are diesel- and oil-range petroleum hydrocarbons in groundwater samples collected from RTN001-13 and RTN002-06. In RTN001-13, diesel- and oil-range hydrocarbons were detected at 400 and 740 micrograms per liter (μg/L), respectively. In RTN002-06, diesel- and oil-range petroleum hydrocarbons were detected at 330 and 360 μg/L. The combined MTCA criterion for diesel- and oil-range petroleum hydrocarbons is 500 μg/L FINDINGS AND DISCUSSION Evaluate Potential for Off- to On-Site Migration from the North Groundwater sampling conducted in April 2019 identified diesel- and oil-range petroleum hydrocarbon contamination in MW-1 (380 and 620 μg/L, respectively). It was suspected that this contamination was coming on to the site from the adjacent northern parcel because of (1)ȱMW-1’s proximity to the north property line ȱsaid parcelǰ and (2) estimated groundwaterȱflow direction (west to southwest) (see Figure C-3, contained in Appendix C). To evaluateȱthe potential for off- to on-site contaminant migration, monitoring wells RTN002-05 andȱRTN002-06 were installed approximately 20 feet to the west and east (respectively) of MW-1ȱalong the property line. Groundwater from RTN002-05 contained detectable (250 μg/L) levels of oil-range petroleum hydrocarbons but not diesel-range petroleum hydrocarbons. Groundwater from RTN002-06 contained detectable diesel- and oil-range petroleum hydrocarbons (330 and 360 μg/L, respectively), which combined exceeds the MTCA Method A cleanup level of 500 μg/L. MW-1 was not sampled during this investigation. Since no soil samples collected from RTN002-05 and RTN002-06 contained elevated contaminant concentrations, no source has been identified. However, with elevated concentrations in RTN002-06 groundwater and the general southwesterly groundwater flow direction, the suspected location of the source remains to be to the northeast of these locations. Mr. Ross Stainsby Sound Transit December 9, 2021 Page 7 of 8 104059-202-L1f.docx//wp/lkn 104059-202 Fill Data Gaps Between Groundwater Plumes Two petroleum-contaminated groundwater plumes, one beneath the RTN001 service shop and one beneath the northern portion of the RTN002 body shop, were roughly delineated during the Supplemental ESA. However, uncertainties remained. Therefore, four groundwater monitoring wells were installed and sampled during this investigation. Samples were analyzed for diesel- and oil-range petroleum hydrocarbons. Diesel- and oil-range petroleum hydrocarbons were detected above its MTCA Method A cleanup criteria in two of the four monitoring wells, RTN001-13 and RTN002-06. Given the site’s predominantly southwestern and western groundwater flow direction, it is possible that the contamination detected in RTN001-13 originated from the unidentified source suspected to the northeast of the norther property line. Data collected during this assessment assisted with filling in previously existing data gaps. Based on the results from this investigation the estimated extents of contamination have been revised and are shown in Figure 2. Further Delineate Extent of Soil Contamination Hot Spots Three petroleum contaminated soil “hot spots” were identified at the site in 2019, one to the west of the RTN001 service shop (RTN001-11), one to the east of the RTN002 body shop (RTN002-3), and one near the southeast property line (RTN004-1). Step out soil samples were collected during this investigation to the north, east, south, and west of each “hot spot” (Figure 2) and analyzed for diesel- and oil-range petroleum hydrocarbons. MTCA Method A cleanup criterion exceedances were not detected in any of the step out samples. Therefore, the boundaries of these “hot spots” have been delineated. North-Central Area While not specifically targeted for this investigation, concurrent with evaluating groundwater, four explorations were advanced, sampled, and soil was analyzed for diesel- and oil-range petroleum hydrocarbons. None of the analytes were detected at concentrations above their respective MTCA Method A cleanup criteria. Combining these results with those of previous site investigations, and no known sources, there is no known soil contamination in the north-central portion of the site. Mr. Ross Stainsby Sound Transit December 9, 2021 Page 8 of 8 104059-202-L1f.docx//wp/lkn 104059-202 The soil samples collected during this investigation helped further delineate petroleum soil contamination underneath the RTN001 service shop. The absence of MTCA exceedances in RTN001-12 and -13 indicated service shop soil contamination does not extend to the east, towards RTN002. CLOSURE Shannon & Wilson has prepared the enclosure, “Important Information About Your Environmental Report,” to assist you and others in understanding the use and limitations of our reports. Sincerely, SHANNON & WILSON Agnes Tirao, PE Senior Associate ACT:JXS:MED:SWG/act Enc. c: Table 1 – Survey and Depth to Groundwater Data Table 2 – Sampling Summary (2 pages) Table 3 – Soil Analytical Results Table 4 – Polycyclic Aromatic Hydrocarbon Analytical Results Table 5 – Toxicity Equivalency Factor-Adjusted Polycyclic Aromatic Hydrocarbon Concentrations (3 pages) Table 6 – Groundwater Analytical Results Figure 1 – Vicinity Map Figure 2 – 2021 Site and Exploration Plan Figure 3 – 2019 and 2021 Analytical Results Appendix A – Methodology and Exploration Logs Appendix B – Analytical Laboratory Reports Appendix C – Previous Site Investigation Data Appendix D – Disposal Documentation Important Information About Your Environmental Report Ms. Susan Penoyar, Sound Transit Additional Environmental SamplingSound Ford PropertyRenton, WashingtonMonitoring Well ID Northing EastingTop of PVC Casing ElevationMonument ElevationGround Elevation 5/30/2019 7/22/2021MW-1 175368.68 1298509.65 25.90 26.32 26.32 5.70 6.25MW-2 175116.18 1298178.48 25.61 26.00 26.00 7.12 7.24MW-3 175012.54 1298426.36 26.85 27.10 27.09 7.28 7.48MW-4 175253.67 1298326.43 27.33 27.66 27.63 8.24 --MW-5 175062.88 1298307.60 26.76 27.10 27.09 8.04 --MW-6 175286.18 1298123.26 26.60 26.93 26.89 7.25 7.42MW-7 175279.86 1298480.29 25.79 26.34 26.32 5.92 8.28RTN001-12 -- -- -- -- -- -- 5.90RTN001-13 -- -- -- -- -- -- 5.92RTN002-05 -- -- -- -- -- -- 5.95RTN002-06 -- -- -- -- -- -- 5.75NOTES: Monument elevation was measured on top and center of the monument lid. Location data provided is from survey completed April and May 2019.Ground elevation was measured to the north of the monument on the pre-existing surfaceNAD = North American Datum; NAVD = North American Vertical Datum; PVC = polyvinyl chlorideDepth to Groundwater (From Top of Casing)Table 1 - Survey and Depth to Groundwater DataHorizontal Datum (NAD 83/11) Vertical Datum (NAVD 88)104059-202104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtoncPAHsSoil Water SoilRTN001-12Yes Auger X XRTN001-13Yes Auger X XRTN001-11-S1 North of RTN001-11 No Direct Push X XRTN001-11-S2 East of RTN001-11 No Direct Push X XRTN001-11-S3 South of RTN001-11 No Direct Push X XRTN001-11-S4 West of RTN001-11 No Direct Push X XRTN002-5 Property Line Northwest of MW-1 Yes Auger X XRTN002-6 Property Line Northeast of MW-1 Yes Auger X XRTN002-3-S1 North of RTN002-3 No Direct Push XRTN002-3-S2 East of RTN002-3 No Direct Push XRTN002-3-S3 South of RTN002-3 No Direct Push XRTN002-3-S4 West of RTN002-3 No Direct Push XRTN002Evaluate potential off- to on-site contamination migration from the northDelineate soil contamination found at RTN002-3 (parking lot hot spot)DxRTN001East of RTN001-2 Fill data gap east of RTN002-1Delineate soil contamination found at RTN001-11 (parking lot hot spot)Table 2 - Sampling SummaryParcelExploration Designation Location Purpose of ExplorationPermanent MW InstallExploration Method104059-202 Page 1 of 2104059-202-L1f-Tables.xlsx - 12/8/2021/ Additional Environmental SamplingSound Ford PropertyRenton, WashingtoncPAHsSoil Water SoilDxTable 2 - Sampling SummaryParcelExploration Designation Location Purpose of ExplorationPermanent MW InstallExploration MethodRTN004-1-S1 North of RTN004-1 No Direct Push XRTN004-1-S2 East of RTN004-1 No Direct Push XRTN004-1-S3* South of RTN004-1 No Direct Push XRTN004-1-S4 West of RTN004-1 No Direct Push XNOTES:* Sample location may be abandoned due to being within the public right-of-way. Southern delination would be estimated upon data from North, East, and West sample locations.Depths will be extended to the stated depth or a few feet past first encountered groundwater, whichever depth is shallower.Up to two soil samples will be taken from each exploration location. cPAHs = carcinogenic polyaromatic hydrocarbons; Dx = Northwest Total Petroleum Hydrocarbons as Diesel Extended (NWTPH-Dx); MW = monitoring well; X = selected analysisRTN004Delineate soil contamination found at RTN004-1 (parking lot hot spot)104059-202 Page 2 of 2104059-202-L1f-Tables.xlsx - 12/8/2021/ Additional Environmental Sampling Sound Ford Property Renton, Washington Diesel Lube Oil RTN002-05:2' 07/19/21 <27 <55 RTN002-05:9' 07/19/21 <34 <67 RTN002-06:2.5' 07/19/21 170 430 RTN002-06:8' 07/19/21 <35 <70 RTN002-3-S1:3.5' 07/19/21 <32 67 RTN002-3-S1:9' 07/19/21 <37 <74 RTN002-3-S4:3' 07/19/21 120 390 RTN002-3-S4:9.5' 07/19/21 <35 <69 RTN002-3-S3:4' 07/19/21 200 830 RTN002-3-S3:6' 07/19/21 <38 <76 RTN002-3-S2:4' 07/19/21 <28 86 RTN002-3-S2:9' 07/19/21 <37 <74 RTN004-1-S2:2' 07/19/21 41 460 RTN004-1-S2:7' 07/19/21 <43 360 RTN004-1-S1:3.5' 07/19/21 43 620 RTN004-1-S1:6' 07/19/21 <37 <74 RTN004-1-S4:4' 07/19/21 51 510 RTN004-1-S4:7' 07/19/21 <31 190 RTN004-1-S3:1.5' 07/19/21 <27 86 RTN004-1-S3:8' 07/19/21 <32 <64 RTN001-12:1.5' 07/19/21 <29 200 RTN001-12:1.8' 07/19/21 <35 <70 RTN001-13:1' 07/19/21 <31 <61 RTN001-13:6 07/19/21 520 <64 RTN001-11-S1:5' 07/20/21 <34 76 RTN001-11-S1:8' 07/20/21 <33 <67 RTN001-11-S2:2.5' 07/20/21 <32 300 RTN001-11-S2:10' 07/20/21 <31 160 RTN001-11-S3:1' 07/20/21 <31 400 RTN001-11-S3:8.5' 07/20/21 40 <64 RTN001-11-S4:2' 07/20/21 <27 430 RTN001-11-S4:7' 07/20/21 <35 <70 2000 2000 NOTES: Bold text indicates detected analyte. RTN002-05 Table 3 - Soil Analytical Results Original Geoprobe Designation Step Out Designation Sample Number Sample Date Total Petroleum Hydrocarbons (mg/kg) RTN001-12 RTN002-06 RTN002-3 S1 S4 S3 S2 RTN004-1 S2 S1 S4 S3 RTN001-13 RTN001-11 S1 S2 S3 S4 MTCA Method A Cleanup Level < = not detected above indicated reporting limit.; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act 104059-202 104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtonBoring/Well Number:Sample Number: RTN001-11-S1:5' RTN001-11-S1:8' RTN001-11-S2:2.5' RTN001-11-S2:10' RTN001-11-S3:1' RTN001-11-S3:8.5' RTN001-11-S4:2' RTN001-11-S4:7'Sample Depth: 5 8 2.5 10 1 8.5 2 7Sample Date: 7/20/2021 7/20/2021 7/20/20217/20/2021 7/20/2021 7/20/2021 7/20/2021 7/20/2021Naphthalene <0.0090 <0.00890.060 0.022 0.015< 0.0085 < 0.0072 < 0.0010 52-Methylnaphthalene <0.0090 <0.00890.069 0.026 0.011< 0.0085 < 0.0072 < 0.0010 51-Methylnaphthalene <0.0090 <0.00890.0470.021 <0.0081 < 0.0085 < 0.0072 < 0.0010 5Acenaphthylene <0.0090 <0.00890.014<0.0084 <0.0081 < 0.0085 < 0.0072 < 0.0010 NEAcenaphthene <0.0090 <0.00890.0092<0.0084 <0.0081 < 0.0085 < 0.0072 < 0.0010 NEFluorene <0.0090 <0.00890.020<0.0084 <0.0081 < 0.0085 < 0.0072 < 0.0010 NEPhenanthrene0.010<0.00890.11 0.066 0.021< 0.00850.022< 0.0010 NEAnthracene <0.0090 <0.00890.036 0.0090<0.0081 < 0.0085 < 0.0072 < 0.0010 NEFluoranthene 0.012<0.00890.13 0.041 0.013< 0.00850.022< 0.0010 NEPyrene0.012<0.00890.13 0.038 0.015< 0.00850.024< 0.0010 NEBenzo[g,h,i]perylene <0.0090 <0.00890.053 0.0088 0.018< 0.00850.018< 0.0010 NEbenzo(a)pyrene <0.0090 <0.00890.047<0.00840.018< 0.00850.016< 0.0010 0.1benzo(a)anthracene <0.0090 <0.00890.038 0.012 0.0096< 0.00850.013< 0.0010 NEbenzo(b)fluoranthene <0.0090 <0.00890.091 0.016 0.019< 0.00850.018< 0.0010 NEbenzo(k)fluoranthene <0.0090 <0.00890.021<0.0084 <0.0081 < 0.0085 < 0.0072 < 0.0010 NEchrysene <0.0090 <0.00890.093 0.023 0.029< 0.00850.019< 0.0010 NEdibenzo[a,h]anthracene <0.0090 <0.00890.0087<0.0084 <0.0081 < 0.0085 < 0.0072 < 0.0010 NEindeno[1,2,3-cd]pyrene <0.0090 <0.00890.040<0.00840.013< 0.00850.012< 0.0010 NETotal cPAH TEQ (see Table 4) 0.0068 0.00640.068 0.0085 0.0240.00640.0210.0070 0.1NOTES:Bold text indicates detected analyte. Carcinogenic Polycyclic Aromatic Hydrocarbons (mg/kg)Table 4 - Polycyclic Aromatic Hydrocarbon Analytical Results Polycyclic Aromatic Hydrocarbons (mg/kg)MTCA Method A CUL for Unrestricted Land Use< =not detected above indicated reporting limit; cPAH = carcinogenic polycyclic aromatic hydrocarbon; CUL = cleanup level; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act; NE = not established; TEQ = toxic equivalent concentrationRTN001-11-S1 RTN001-11-S2RTN001-11-S3 RTN001-11-S4104059-202104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental Sampling Sound Ford Property Renton, Washington Analyte Result (mg/kg) Method Detection Limit (mg/kg) Toxicity Equivalency Factor Adjusted Concentration1 (mg/kg) Benzo(a)pyrene ND 0.009 1 0.0045 Benzo(a)anthracene ND 0.009 0.1 0.00045 Benzo(b)fluoranthene ND 0.009 0.1 0.00045 Benzo(k)fluoranthene ND 0.009 0.1 0.00045 Chrysene ND 0.009 0.01 0.000045 Dibenzo[a,h]anthracene ND 0.009 0.1 0.00045 Indeno[1,2,3-cd]pyrene ND 0.009 0.1 0.00045 Total cPAH TEQ2 0.0068 0.10 Analyte Result (mg/kg) Method Detection Limit (mg/kg) Toxicity Equivalency Factor Adjusted Concentration1 (mg/kg) Benzo(a)pyrene ND 0.0085 1 0.00425 Benzo(a)anthracene ND 0.0085 0.1 0.000425 Benzo(b)fluoranthene ND 0.0085 0.1 0.000425 Benzo(k)fluoranthene ND 0.0085 0.1 0.000425 Chrysene ND 0.0085 0.01 0.0000425 Dibenzo[a,h]anthracene ND 0.0085 0.1 0.000425 Indeno[1,2,3-cd]pyrene ND 0.0085 0.1 0.000425 Total cPAH TEQ2 0.0064 0.10 Analyte Result (mg/kg) Method Detection Limit (mg/kg) Toxicity Equivalency Factor Adjusted Concentration1 (mg/kg) Benzo(a)pyrene 0.047 0.0085 1 0.047 Benzo(a)anthracene 0.038 0.0085 0.1 0.0038 Benzo(b)fluoranthene 0.091 0.0085 0.1 0.0091 Benzo(k)fluoranthene 0.021 0.0085 0.1 0.0021 Chrysene 0.093 0.0085 0.01 0.00093 Dibenzo[a,h]anthracene 0.0087 0.0085 0.1 0.00087 Indeno[1,2,3-cd]pyrene 0.040 0.0085 0.1 0.004 Total cPAH TEQ2 0.068 0.10 Total cPAH TEQ Calculation for Sample RTN001-11-S2:2.5' MTCA Method A Cleanup Level for Unrestricted Land Use Table 5 - Toxicity Equivalency Factor-Adjusted Polycyclic Aromatic Hydrocarbon Concentrations Total cPAH TEQ Calculation for Sample RTN001-11-S1:5' MTCA Method A Cleanup Level for Unrestricted Land Use Total cPAH TEQ Calculation for Sample RTN001-11-S1:8' MTCA Method A Cleanup Level for Unrestricted Land Use 104059-202 Page 1 of 3 104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental Sampling Sound Ford Property Renton, Washington Table 5 - Toxicity Equivalency Factor-Adjusted Polycyclic Aromatic Hydrocarbon Concentrations Analyte Result (mg/kg) Method Detection Limit (mg/kg) Toxicity Equivalency Factor Adjusted Concentration1 (mg/kg) Benzo(a)pyrene ND 0.0084 1 0.0042 Benzo(a)anthracene 0.012 0.0084 0.1 0.0012 Benzo(b)fluoranthene 0.016 0.0084 0.1 0.0016 Benzo(k)fluoranthene ND 0.0084 0.1 0.00042 Chrysene 0.023 0.0084 0.01 0.00023 Dibenzo[a,h]anthracene ND 0.0084 0.1 0.00042 Indeno[1,2,3-cd]pyrene ND 0.0084 0.1 0.00042 Total cPAH TEQ2 0.0085 0.10 Analyte Result (mg/kg) Method Detection Limit (mg/kg) Toxicity Equivalency Factor Adjusted Concentration1 (mg/kg) Benzo(a)pyrene 0.018 0.0081 1 0.018 Benzo(a)anthracene 0.0096 0.0081 0.1 0.00096 Benzo(b)fluoranthene 0.019 0.0081 0.1 0.0019 Benzo(k)fluoranthene ND 0.0081 0.1 0.000405 Chrysene 0.029 0.0081 0.01 0.00029 Dibenzo[a,h]anthracene ND 0.0081 0.1 0.000405 Indeno[1,2,3-cd]pyrene 0.018 0.0081 0.1 0.0018 Total cPAH TEQ2 0.024 0.10 Analyte Result (mg/kg) Method Detection Limit (mg/kg) Toxicity Equivalency Factor Adjusted Concentration1 (mg/kg) Benzo(a)pyrene ND 0.0085 1 0.00425 Benzo(a)anthracene ND 0.0085 0.1 0.000425 Benzo(b)fluoranthene ND 0.0085 0.1 0.000425 Benzo(k)fluoranthene ND 0.0085 0.1 0.000425 Chrysene ND 0.0085 0.01 0.0000425 Dibenzo[a,h]anthracene ND 0.0085 0.1 0.000425 Indeno[1,2,3-cd]pyrene ND 0.0085 0.1 0.000425 Total cPAH TEQ2 0.0064 0.10 MTCA Method A Cleanup Level for Unrestricted Land Use Total cPAH TEQ Calculation for Sample RTN001-11-S3:8.5' MTCA Method A Cleanup Level for Unrestricted Land Use Total cPAH TEQ Calculation for Sample RTN001-11-S2:10' MTCA Method A Cleanup Level for Unrestricted Land Use Total cPAH TEQ Calculation for Sample RTN001-11-S3:1' 104059-202 Page 2 of 3 104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental Sampling Sound Ford Property Renton, Washington Table 5 - Toxicity Equivalency Factor-Adjusted Polycyclic Aromatic Hydrocarbon Concentrations Analyte Result (mg/kg) Method Detection Limit (mg/kg) Toxicity Equivalency Factor Adjusted Concentration1 (mg/kg) Benzo(a)pyrene 0.016 0.0072 1 0.016 Benzo(a)anthracene 0.013 0.0072 0.1 0.0013 Benzo(b)fluoranthene 0.018 0.0072 0.1 0.0018 Benzo(k)fluoranthene ND 0.0072 0.1 0.00036 Chrysene 0.019 0.0072 0.01 0.00019 Dibenzo[a,h]anthracene ND 0.0072 0.1 0.00036 Indeno[1,2,3-cd]pyrene 0.012 0.0072 0.1 0.0012 Total cPAH TEQ2 0.021 0.10 Analyte Result (mg/kg) Method Detection Limit (mg/kg) Toxicity Equivalency Factor Adjusted Concentration1 (mg/kg) Benzo(a)pyrene ND 0.0093 1 0.00465 Benzo(a)anthracene ND 0.0093 0.1 0.000465 Benzo(b)fluoranthene ND 0.0093 0.1 0.000465 Benzo(k)fluoranthene ND 0.0093 0.1 0.000465 Chrysene ND 0.0093 0.01 0.0000465 Dibenzo[a,h]anthracene ND 0.0093 0.1 0.000465 Indeno[1,2,3-cd]pyrene ND 0.0093 0.1 0.000465 Total cPAH TEQ2 0.0070 0.10 NOTES: 2 Sum of the TEF adjusted concentration for each cPAH. Shaded text indicates a concentration exceeding the MTCA cleanup level. Total cPAH TEQ Calculation for Sample RTN001-11-S4:2' MTCA Method A Cleanup Level for Unrestricted Land Use Total cPAH TEQ Calculation for Sample RTN001-11-S4:7' MTCA Method A Cleanup Level for Unrestricted Land Use cPAH = carcinogenic polycyclic aromatic hydrocarbon; MDL = Method Detection Limit; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act; ND = not detected above the MDL; TEF = toxicity equivalency factor; TEQ = toxic equivalent concentration 1 For detected compounds, calculated as the detected concentration multiplied by the compound's TEF. For compounds that are ND, calculated as one-half of the MDL multiplied by the compound's TEF. 104059-202 Page 3 of 3 104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental Sampling Sound Ford Property Renton, Washington Sample Location and Name RTN001-12 RTN001-13 RTN002-05 RTN002-06 Sample Date 7/22/2021 7/22/2021 7/22/2021 7/22/2021 Method A Total Petroleum Hydrocarbons (TPHs) Diesel Range Organics <200 400 <200 330 500 Lube Oil Range Organics <200 740 250 360 500 NOTES: Value reported in micrograms per liter (μg/L). Bold text indicates detected analyte. Shading indicates value is above the MTCA Method A criteria. < = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limit MTCA-= Model Toxics Control Act Table 6 - Groundwater Analytical Results MTCA 104059-202 104059-202-L1f-Tables.xlsx - 12/8/2021 © 2017 DigitalGlobe ©CNES (2017) Distribution Airbus DS © 2017 Microsoft Corporation 167 405 Railroad Rainier Avenue SS Grady Wa y Renton S 3rd Street900 LakeAvenue SAvenue SSha t tu c k S 7th Street 515 Benson Drive SRPROJECT LOCATION VICINITY MAP 'HFember 2021 104059-202 Filename: C:\Users\jrs\CAD Group Dropbox\JDrive\_SEA\104059\202\104059-202 Vicinity Map.dwg Date: 11-03-2021 Login: JRSWashingtonProjectLocation 90 5 South Renton Transit Center Sound Transit ROW #RTN001 Through RTN004 Renton, Washington 0 1,000 2,000 Approximate Scale in Feet FIG. 1 Seattle RTN001Rainier Avenue SS Grady WayLake Avenue S RTN002RTN001-1RTN003-1RTN003-3RTN003-2RTN002-4MW-2MW-6RTN003RTN001-9MW-3MW-4MW-5Body ShopShowroomPartsService ShopUsed CarSales OfficeRTN002-3RTN004-1RTN001-11RTN001-6RTN001-7RTN001-8RTN001-10RTN001-3RTN002-1RTN002-2MW-1RTN001-2RTN001-5RTN004RTN002-05RTN002-06RTN001-13RTN001-12RTN002-3-S1RTN002-3-S4RTN002-3-S3RTN002-3-S2RTN001-11-S1RTN001-11-S4RTN001-11-S3RTN001-11-S2RTN004-1-S1RTN004-1-S4RTN004-1-S3*RTN004-1-S2RTN001-4MW-7SITE AND EXPLORATION PLANFilename: C:\Users\jrs\CAD Group Dropbox\JDrive\_SEA\104059\202\104059-202 Explorations.dwg Layout: Figure 2 Date: 11-12-2021 Login: JRSAdditional Soil Sampling and Monitoring WellInstallation Designation and Location (July 2021)Additional Soil Sampling Designation and Location(July 2021)Relocated North, Onto the PropertySurveyed Existing Monitoring Well LocationProbe Designation and Approximate LocationLEGENDMW-1FIG. 2RTN001-110100 200Approximate Scale in FeetRTN001RTN004-1-S4RTN001-12Sound Transit Right-of-Way Location DesignationApproximate Extent of Lube Oil/Diesel Impacts(Saturated Zone Soil)Approximate Extent of Lube Oil/Diesel Impacts(Groundwater)'HFHPEHU 2021104059-202South Renton Transit CenterSound Transit ROW #RTN001 Through RTN004Renton, WashingtonRTN004-1-S3* RTN001Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004MW-1MW-2MW-5MW-6RTN003MW-3MW-7MW-4RTN002-05RTN002-06RTN001-13RTN001-12RTN002-3-S1RTN002-3-S4RTN002-3-S3RTN002-3-S2RTN001-11-S1RTN001-11-S4RTN001-11-S3RTN001-11-S2RTN004-1-S1RTN004-1-S4RTN004-1-S3*RTN004-1-S22019 AND 2021ANALYTICAL RESULTSFilename: C:\Users\jrs\CAD Group Dropbox\JDrive\_SEA\104059\202\104059-202 Analytic Results 2019-2021.dwg Layout: Figure 3 Date: 11-11-2021 Login: JRSMW-1FIG. 3'HFember 2021104059-202South Renton Transit CenterSound Transit ROW #RTN001 Through RTN004Renton, Washington0100 200Approximate Scale in FeetMonitoring Well LocationApproximate Probe LocationAdditional Soil Sampling and Monitoring WellInstallation Designation and Location(July 2021)Additional Soil Sampling Designationand Location (July 2021)Relocated North, Onto the PropertyFormer Underground Storage Tank (UST)Aboveground Storage Tank (AST)Existing HoistFormer HoistLEGENDRTN001-11CONTAMINANTS EXPLANATIONTPH (Soils) TPH (Groundwater)Polycyclic Aromatic HydrocarbonsTotal Petroleum HydrocarbonsPAHsTPHDetected Above MTCADetected Below MTCA, but Abovethe Laboratory Reporting LimitNot Analyzed or Detected Abovethe Laboratory Reporting LimitPAHs (Soils)Additional Soil Sampling and Monitoring WellInstallation Designation and Location (July 2021)Additional Soil Sampling Designation and Location(July 2021)Relocated North, Onto the PropertySurveyed Existing Monitoring Well LocationProbe Designation and Approximate LocationRTN004-1-S4RTN001-12RTN004-1-S3* 104059-202 Appendix A Field Methods and Exploration Logs South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 12/8/2021-104059-202-L1f-AA.docx/wp/lkn A-iAPPENDIX A: FIELD METHODS AND EXPLORATION LO**S Appendix A: Field Methods and Exploration Logss Appendix A Field Methods and Exploration Logs CONTENTS A.1 Introduction ........................................................................................................................... A-1 A.2 Pre-Sampling Activities ........................................................................................................ A-1 A.3 Sample Collection ................................................................................................................. A-1 A.3.1 Direct-Push Rig Drilling .......................................................................................... A-1 A.3.1.1 Soil Sampling ............................................................................................ A-2 A.3.1.2 Well Installation ....................................................................................... A-2 A.3.1.3 Well Development ................................................................................... A-2 A.3.2 Groundwater Sampling ........................................................................................... A-2 A.4 Sampling Handling ............................................................................................................... A-2 A.5 Field Screening Methods ...................................................................................................... A-3 A.5.1 Photoionization Detector Measurements .................................................................. 3 A.5.2 Visual Observation ................................................................................................... A-4 A.5.3 Odors .......................................................................................................................... A-4 A.5.4 Field Screening Documentation ............................................................................. A-4 A.6 Analytical Methods ............................................................................................................... A-4 A.7 Decontamination Methods .................................................................................................. A-5 A.7.1 Drilling Equipment .................................................................................................. A-5 A.7.2 Sampling Equipment ............................................................................................... A-5 A.8 Investigation-Derived Waste ............................................................................................... A-5 Figures Figure A-1: Soil Description and Log Key (2 sheets) Figure A-2: Log of Geoprobe RTN001-11-S1 Figure A-3: Log of Geoprobe RTN001-11-S2 Figure A-4: Log of Geoprobe RTN001-11-S3 Figure A-5: Log of Geoprobe RTN001-11-S4 Figure A-6: Log of Geoprobe RTN001-12 Figure A-7: Log of Geoprobe RTN001-13 South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 12/8/2021-104059-202-L1f-AA.docx/wp/lkn A-iiAPPENDIX A: FIELD METHODS AND EXPLORATION//OGSFigure A-8: Log of Geoprobe RTN005-05 Figure A-9: Log of Geoprobe RTN005-06 Figure A-10: Log of Geoprobe RTN002-3-S1 Figure A-11: Log of Geoprobe RTN002-3-S2 Figure A-12: Log of Geoprobe RTN002-3-S3 Figure A-13: Log of Geoprobe RTN002-3-S4 Figure A-14: Log of Geoprobe RTN004-1-S1 Figure A-15: Log of Geoprobe RTN004-1-S2 Figure A-16: Log of Geoprobe RTN004-1-S3 Figure A-17: Log of Geoprobe RTN004-1-S4 South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 A-1APPENDIX A: FIELD METHODS AND EXPLORATIONLOGSA.1 INTRODUCTION The project consisted of performing subsurface environmental sampling (soil and groundwater) to support development of the South Renton Transit Center (the site), located in Renton, Washington. The investigation and analyses are intended to assess quality of soil and groundwater that is present in the subsurface. Standard investigation methods, including sample collection, field screening, documentation procedures, and selected analyses, are described briefly in the following subsections. Sample collection and documentation were completed in accordance with Shannon & Wilson’s standard operating procedures. A.2 PRE-SAMPLING ACTIVITIES Shannon & Wilson communicated with Sound Transit to gain access to the site and coordinate with others completing subsurface explorations on site. Coordination included participation in project meetings, coordinating one private utility locating and survey effort for multiple investigations, notifying property management and security, and confirming schedules that were dependent on federal review. In addition to coordinating access, a representative of Shannon & Wilson notified the Underground Utilities Location Center (1-800-424-5555) at least 48 hours before the start of subsurface work at the site. A.3 SAMPLE COLLECTION During the field investigation, soil and groundwater samples were collected to evaluate the potential for site contamination. The various methods of collecting samples are presented below. Sample handling procedures are summarized in Section A.4. Select samples were submitted to OnSite Environmental in Redmond, Washington. Samples were analyzed by the methods discussed in Section A.6. Decontamination procedures are presented in Section A.7. A.3.1 Direct-Push Rig Drilling A direct-push hydraulic probe rig was used to collect subsurface soil and groundwater samples. Sixteen explorations were advanced to 10 feet below ground surface. Up to two soil depth intervals were sampled from each exploration. Samples were taken from either South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 A-2APPENDIX A: FIELD METHODS AND EXPLORATION LOGS the fill-native soil interface or from just above the observed groundwater interface. Groundwater samples were taken from each of the borings. Logs for the explorations are included within this Appendix (Figures A-2 through A-17). A.3.1.1 Soil Sampling Soil was visually described using Shannon & Wilson’s soil classification procedure, which is a modified version of the Unified Soil Classification System. The soil classification procedure can be seen in Figure A-1. The soil descriptions were recorded on the field log. When a soil sample was selected for chemical analysis, the soil sample was placed into laboratory-supplied glassware using disposable, stainless steel spoons. A.3.1.2 Well Installation A pre-pack 2-inch-outside-diameter well was installed in four explorations to collect groundwater samples. The 10-foot-deep wells were constructed of 2-inch-diameter, Schedule 40 polyvinyl chloride pipe, with 5 feet of screen. A flush monument was then set in concrete at ground surface. A.3.1.3 Well Development At least 24 hours after the well was installed, wells were developed by using a surge block to remove turbid water and infiltrated filter pack. Well development was completed at least 24 hours prior to collection of groundwater parameters and sampling. Water removed from the wells was placed into drums for later disposal (see Section A.8). A.3.2 Groundwater Sampling One groundwater sample was collected from each of the newly installed monitoring wells. Groundwater was withdrawn using a peristaltic pump and disposable tubing. Field personnel purged each well using a low-flow peristaltic pump set to a rate of less than 500 milliliters per minute. Purging continued until the turbidity of the groundwater visually appeared to stabilize. The purge water was collected in a bucket and transferred to a drum pending disposal. Following purging, groundwater samples were collected using the peristaltic pump. A.4 SAMPLING HANDLING Environmental samples were collected using disposable sampling equipment. Gloves were worn by the sample handler during collection of each sample. Non-disposable sampling South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 A-3APPENDIX A: FIELD METHODS AND EXPLORATION LOGSequipment was decontaminated between sample locations to reduce potential for cross contamination. Field notes documented site conditions and sample collection activities. Samples collected for laboratory analysis were placed into pre-cleaned laboratory-provided glassware. Where appropriate, samples were containerized sequentially, with the most volatile target analyte collected first. The preferred collection order for some of the more common analytes is: (a) volatile organics and petroleum, (b) semi-volatile organics, and (c) metals. The sample container labels were completed using indelible ink. The samples were sealed in plastic bags and then placed into a cooler and maintained at 4 degrees Celsius (°C) (+ 2°C) with “blue ice.” Sample information was recorded on chain-of-custody forms, and these forms accompanied the samples to the laboratory. Samples were maintained under chain-of-custody until delivered to OnSite Environmental. A.5 FIELD SCREENING METHODS Field screening of soil samples helped evaluate the potential presence of contamination. Typically, at a nonhazardous waste site, the most likely locations to encounter contamination are in fill, at the water table interface, in the water table smear (fluctuation) zone, at fill/native soil contacts, and at pronounced changes in permeability. However, the location of contamination, if any, is site-dependent. Field screening methods typically consisted of: Photoionization detector (PID) measurements. Visual observations. Olfactory observations. The three methods were used for the site. Decontaminated perfluoroalkyl and polyfluoroalkyl substances- (PFAS-) free gloves were worn by the field personnel during the screening. Environmental samples were collected using disposable sampling equipment. A.5.1 Photoionization Detector Measurements PID measurements were collected on soil samples to screen for volatile organic vapors such as gasoline and solvents. Typically, decaying organics can elevate PID measurements and diesel and oil can rarely be detected with the PID. PID measurements were obtained by passing the instrument directly over the soil or by performing a headspace measurement. South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 A-4APPENDIX A: FIELD METHODS AND EXPLORATION LOGSHeadspace measurements were used to confirm low PID readings or to check for low volatility contaminants such as old petroleum products by the following procedure: Place an amount of soil into a ZiplocTM bag. Place the bag in a warm environment. Wait a consistent amount of time for the soil to reach “ambient” conditions (usually 15 minutes). Insert the top of the PID into a very small slit in the bag. Take a PID reading and record the data. A.5.2 Visual Observation Visual observations of soil samples and cuttings were recorded in the boring log or in the field logbook. Indications of contamination include: Black, tarry substances. Oily or shiny soil. Metallic flakes. Free product petroleum or organic hydrocarbons. Gray, pink, red, or black discolorations. A.5.3 Odors No unusual odors were recorded drilling or sampling. Soil was not intentionally smelled for contamination. Soil was not tasted for classification purposes. A.5.4 Field Screening Documentation During screening, the following items were recorded: Type of measurement/observation. Depth. Time of measurement or observation. Possible source. Description of odor (petroleum, decaying organics, creosote, cedar, etc.). A.6 ANALYTICAL METHODS Selected soil and groundwater samples were analyzed for: South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 A-5APPENDIX A: FIELD METHODS AND EXPLORATION LOGSDiesel- and oil-range hydrocarbons using Northwest Total Petroleum Hydrocarbons- Diesel Extended. Selected soil samples were analyzed for: Polycyclic aromatic hydrocarbons by U.S. Environmental Protection Agency Methods 8270E and 8270ESIM. A.7 DECONTAMINATION METHODS The primary objective of the decontamination process is to reduce the potential for the accidental introduction of contaminants to non-contaminated areas or samples. This section describes the methods associated with decontamination of field equipment. A.7.1 Drilling Equipment Equipment used during soil activities was steam cleaned prior to use. Following decontamination, caution was taken to keep the equipment off the ground by placing the equipment on clean, plastic sheeting or equivalent. The direct-push probe subcontractor provided a sufficient amount of direct-push equipment and samplers to conduct the project without decontaminating between locations. The associated direct-push equipment and samplers were decontaminated at the site at the end of sampling activities. A.7.2 Sampling Equipment Groundwater and soil sampling equipment was cleaned prior to and at the completion of sampling. Wherever possible, sampling equipment was dedicated to a single location to reduce potential cross contamination. Non-dedicated sampling equipment used during the field activities was decontaminated as follows: Remove gross contamination and particulate matter. Wash thoroughly with AlconoxTM or similar non-phosphate detergent plus tap water or designated decontamination water supply source. Rinse equipment thoroughly with PFAS-free water. A.8 INVESTIGATION-DERIVED WASTE Investigation-derived waste (IDW) is waste generated during sampling activities. IDW that was generated during these sampling activities included soil cuttings, development water, purge water, and decontamination water. IDW was placed into steel drums. The drums South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 A-6APPENDIX A: FIELD METHODS AND EXPLORATION LOGSwere temporarily stored on-site. Drums were collected by DH Environmental on September 9, 2021. Miscellaneous IDW consisted of used personal protective equipment (PPE), disposable sampling equipment (spoons, tubing, etc.), and other wastes that originated from site activities. This IDW was placed in doubled, heavy-duty plastic bags. The waste PPE and disposable sampling equipment was disposed of in a dumpster at the drilling subcontractor’s facility and the Shannon & Wilson offices. !"#$#%&' !! 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/DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 85 50-150 &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 82 50-150 2Q6LWH(QYLURQPHQWDO,QF1(WK6WUHHW5HGPRQG:$ 7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW-XO\ 6DPSOHV6XEPLWWHG-XO\ /DERUDWRU\5HIHUHQFH 3URMHFW ',(6(/$1'+($9<2,/5$1*(25*$1,&6 1:73+'[ 48$/,7<&21752/ 0DWUL[ 6RLO 8QLWV PJ.JSSP 'DWH 'DWH $QDO\WH 5HVXOW 34/ 0HWKRG 3UHSDUHG $QDO\]HG )ODJV 0(7+2'%/$1. /DERUDWRU\,' 0%6 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 88 50-150 /DERUDWRU\,' 0%6 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 83 50-150 6RXUFH 3HUFHQW 5HFRYHU\ 53' $QDO\WH 5HVXOW 6SLNH/HYHO 5HVXOW 5HFRYHU\ /LPLWV 53' /LPLW )ODJV '83/,&$7( /DERUDWRU\,' 25,* '83 'LHVHO5DQJH1' 1' 1$ 1$ 1$ 1$ 1$ 1$ /XEH2LO5DQJH1' 1' 1$ 1$ 1$ 1$ 1$ 1$ Surrogate: o-Terphenyl 82 85 50-150 /DERUDWRU\,' 25,* '83 'LHVHO5DQJH1' 1' 1$ 1$ 1$ 1$ 1$ 1$ /XEH2LO 1$ 1$ 1$ 1$ 1$ Surrogate: o-Terphenyl 71 60 50-150 /DERUDWRU\,' 6%6 25,* '83 'LHVHO)XHO 1$ 1$ 1$ 1$ 1$ Surrogate: o-Terphenyl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7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW-XO\ 6DPSOHV6XEPLWWHG-XO\ /DERUDWRU\5HIHUHQFH 3URMHFW ',(6(/$1'+($9<2,/5$1*(25*$1,&6 1:73+'[ 0DWUL[ 6RLO 8QLWV PJ.JSSP 'DWH 'DWH $QDO\WH 5HVXOW 34/ 0HWKRG 3UHSDUHG $QDO\]HG )ODJV &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 73 50-150 &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 69 50-150 &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 64 50-150 &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 76 50-150 &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 79 50-150 &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 79 50-150 2Q6LWH(QYLURQPHQWDO,QF1(WK6WUHHW5HGPRQG:$ 7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW-XO\ 6DPSOHV6XEPLWWHG-XO\ /DERUDWRU\5HIHUHQFH 3URMHFW ',(6(/$1'+($9<2,/5$1*(25*$1,&6 1:73+'[ 0DWUL[ 6RLO 8QLWV PJ.JSSP 'DWH 'DWH $QDO\WH 5HVXOW 34/ 0HWKRG 3UHSDUHG $QDO\]HG )ODJV &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 80 50-150 &OLHQW,' 5716 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 72 50-150 2Q6LWH(QYLURQPHQWDO,QF1(WK6WUHHW5HGPRQG:$ 7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW-XO\ 6DPSOHV6XEPLWWHG-XO\ /DERUDWRU\5HIHUHQFH 3URMHFW ',(6(/$1'+($9<2,/5$1*(25*$1,&6 1:73+'[ 48$/,7<&21752/ 0DWUL[ 6RLO 8QLWV PJ.JSSP 'DWH 'DWH $QDO\WH 5HVXOW 34/ 0HWKRG 3UHSDUHG $QDO\]HG )ODJV 0(7+2'%/$1. /DERUDWRU\,' 0%6 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 80 50-150 6RXUFH 3HUFHQW 5HFRYHU\ 53' $QDO\WH 5HVXOW 6SLNH/HYHO 5HVXOW 5HFRYHU\ /LPLWV 53' /LPLW )ODJV '83/,&$7( /DERUDWRU\,' 6%6 25,* '83 'LHVHO)XHO 1$ 1$ 1$ 1$ 1$ Surrogate: o-Terphenyl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urrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 56 41 - 114 Pyrene-d10 88 39 - 115 Terphenyl-d14 85 44 - 125 2Q6LWH(QYLURQPHQWDO,QF1(WK6WUHHW5HGPRQG:$ 7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW-XO\ 6DPSOHV6XEPLWWHG-XO\ /DERUDWRU\5HIHUHQFH 3URMHFW 3$+V(3$(6,0 0DWUL[ 6RLO 8QLWV PJ.J 'DWH 'DWH $QDO\WH 5HVXOW 34/ 0HWKRG 3UHSDUHG $QDO\]HG )ODJV &OLHQW,' 5716 /DERUDWRU\,' 1DSKWKDOHQH1' (3$(6,0 0HWK\OQDSKWKDOHQH1' (3$(6,0 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(3$(6,0 )OXRUHQH (3$(6,0 3KHQDQWKUHQH (3$(6,0 $QWKUDFHQH (3$(6,0 )OXRUDQWKHQH (3$(6,0 3\UHQH (3$(6,0 %HQ]R>D@DQWKUDFHQH (3$(6,0 &KU\VHQH (3$(6,0 %HQ]R>E@IOXRUDQWKHQH (3$(6,0 %HQ]RMNIOXRUDQWKHQH (3$(6,0 %HQ]R>D@S\UHQH (3$(6,0 ,QGHQRFGS\UHQH (3$(6,0 'LEHQ]>DK@DQWKUDFHQH (3$(6,0 %HQ]R>JKL@SHU\OHQH (3$(6,0 Surrogate: Percent Recovery Control Limits 2-Fluorobiphenyl 68 41 - 114 Pyrene-d10 97 39 - 115 Terphenyl-d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DQGWKHUHIRUHWKHUHSRUWHGUHVXOWVKRXOGEHFRQVLGHUHGDQHVWLPDWH7KHRYHUDOOSHUIRUPDQFHRIWKHFDOLEUDWLRQYHULILFDWLRQVWDQGDUGPHWWKHDFFHSWDQFHFULWHULDRIWKHPHWKRG<1HJDWLYHHIIHFWVRIWKHPDWUL[IURPWKLVVDPSOHRQWKHLQVWUXPHQWFDXVHGYDOXHVIRUWKLVDQDO\WHLQWKHEUDFNHWLQJFRQWLQXLQJFDOLEUDWLRQYHULILFDWLRQVWDQGDUG&&9VWREHRXWVLGHRIDFFHSWDQFHFULWHULD%HFDXVHRIWKLVTXDQWLWDWLRQOLPLWVDQGVDPSOHFRQFHQWUDWLRQVVKRXOGEHFRQVLGHUHGHVWLPDWHV = 1'1RW'HWHFWHGDW34/ 34/3UDFWLFDO4XDQWLWDWLRQ/LPLW 53'5HODWLYH3HUFHQW'LIIHUHQFH 104059-202 Appendix C Previous Site Investigation Data South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 12/8/2021-104059-202-L1f-AC.docx/wp/lkn C-iAPPENDIX C: PREVIOUS SITE INVESTIGATION DATAAppendix C: Previous Site Investigation Data Appendix C Previous Site Investigation Data Subtitle if Applicable CONTENTS C.1 2008 Initial Investigation Field Report ................................................................................ C-1 C.2 2011 Initial Investigation Field Report ................................................................................ C-1 C.3 2017 Phase I Environmental Site Assessment .................................................................... C-2 C.4 2018 Phase II Environmental Site Assessment ................................................................... C-2 C.5 2019 Supplemental Environmental Site Assessment ........................................................ C-4 Tables Table C-1: 2018 Phase II ESA Soil Analytical Results (2 pages) Table C-2: 2018 Phase II ESA Groundwater Analytical Results (2 pages) Table C-3: 2019 Supplemental ESA Soil Analytical Results (3 pages) Table C-4: 2019 Supplemental ESA Groundwater Analytical Results Figures Figure C-1: 2018 Contaminated Soil Locations Figure C-2: 2018 Contaminated Groundwater Locations Figure C-3: 2019 Potentiometric Surface Map South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 C-1APPENDIX C: PREVIOUS SITE INVESTIGATION DATAPrevious site environmental reports include two Initial Investigation Field Reports from the Washington State Department of Ecology (Ecology), and three Environmental Site Assessments (ESAs) from Shannon & Wilson. C.1 2008 INITIAL INVESTIGATION FIELD REPORT According to this report (Ecology, 20081), a petroleum release from underground storage tanks (USTs) was discovered during tank removal in August 1989. Seven USTs were removed from five separate locations, but details regarding excavation locations were not provided in the report. Additionally, a copy of the tank removal report was not available for our review. Confirmation soil samples from one UST excavation contained elevated levels of petroleum analytes, and a grab sample of water detected benzene at 25 micrograms per liter. It is not clear if the grab water sample was collected from the same excavation as the elevated soil petroleum levels. Ecology noted that the tank removal report mentions a gasoline odor in one of the excavations, and that Sound Ford did not authorize installation of groundwater monitoring wells to evaluate whether groundwater was contaminated. C.2 2011 INITIAL INVESTIGATION FIELD REPORT A second Initial Investigation Field Report was completed (Ecology, 20112). This report noted that the excavated USTs had contained gas, lubricating oil, and automatic transmission fluid. It also stated that two confirmation soil samples exceeded Model Toxics Control Act (MTCA) total petroleum hydrocarbon (TPH) cleanup levels (CULs), with TPH detections of 57,155 parts per million (ppm) in one sample and 1,428 ppm in another. The locations of said samples were not provided. Overexcavation was completed for excavations with TPH exceedances and subsequent confirmation samples did not contain contaminant concentrations above the MTCA CUL. This report does not mention the benzene detection described in Ecology 2008, but does mention that a groundwater sample was collected and contained 91 ppm TPH, which was above the then-current MTCA CUL. 1 Washington State Department of Ecology (Ecology), 2008, Initial Investigation Field Report, Parcel # 1923059035: Report prepared by Mr. Wallace Reid, November 10. 2 Washington State Department of Ecology (Ecology), 2011, Initial Investigation Field Report, Site Name: South Ford Inc.: March 17. South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 C-2APPENDIX C: PREVIOUS SITE INVESTIGATION DATAC.3 2017 PHASE I ENVIRONMENTAL SITE ASSESSMENT Shannon & Wilson completed a Phase I ESA (Shannon & Wilson, 20173) and identified several recognized environmental conditions (RECs), including: Potential contamination from historic and current site uses, which include auto repair and auto body shop activities as well as a former rail line, Incomplete documentation of the 1989 UST removals and lack of documentation for removal of sub-floor hydraulic hoists in 1996 and 1997, Possibility of unknown USTs remaining on the site, Waste oil releases from waste oil aboveground storage tanks (ASTs), and Potential off- to on-site contaminant migration from a gas station south of the subject property. A Phase II ESA was recommended to investigate the RECs. C.4 2018 PHASE II ENVIRONMENTAL SITE ASSESSMENT Shannon & Wilson observed the advancement of 19 direct-push borings on the site in February 2018 and collected up to two soil samples from each boring (Shannon & Wilson, 20184). All borings were advanced to 15 feet below ground surface (bgs), except for boring RTN001-9, which was advanced to 20 feet bgs. Additionally, temporary groundwater monitoring wells were installed and sampled in each boring. Soil and groundwater samples were analyzed for TPH gasoline (TPH-G), TPH diesel-range (TPH-D), TPH oil-range (TPH-O), metals, total and dissolved metals, volatile organic compounds (VOCs), and/or chlorinated acid herbicides depending on the media and where the sample was collected from. TPH-D and TPH-O, respectively, MTCA CUL exceedances were detected in soil from five borings, three in RTN001, one in RTN002, and one in RTN004 (Figure C-1). Exceedances from boring RTN001-2 (northeast area of the parcel) are likely associated with releases from 3 Shannon & Wilson, 2017, Phase I environmental site assessment, Sound Transit Right-of-Way #RTN001 through RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington: Report prepared by Shannon & Wilson, Seattle, Wash., for Sound Transit, Seattle, Wash., 21-1-16432-281, December 8. 4 Shannon & Wilson, 2018, Phase II environmental site assessment, Sound Transit Right-of-Way #RTN001 through #RTN004 Sound Ford Property 750 Rainier Avenue S. and 200 S. Grady Way Renton, Washington: Report prepared by Shannon & Wilson, Seattle, Washington, for Sound Transit, Seattle, Washington, 21-1-16700-301, March 9. South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 C-3APPENDIX C: PREVIOUS SITE INVESTIGATION DATAformer USTs and ASTs that contained fuel, oil, and automatic transmission fluid. Contamination in boring RTN001-5 (northeast area of the service shop) may be associated with a former waste oil UST that was located approximately 35 feet west and (likely) hydraulically upgradient of the boring. Three contamination “hot spots” were identified in the parking lot west of the RTN001 service shop (RTN001-11), east of the RTN002 body shop (RTN002-3), and along the southeast site boundary (RTN004-1). RTN001-11 also contained carcinogenic polycyclic aromatic hydrocarbon (cPAH) concentrations above the MTCA CUL. TPH-D and TPH-O groundwater contamination was encountered beneath the RTN001 service building and the RTN002 service shop (Figure C-2). Petroleum-impacted groundwater at RTN001 appears mostly delineated to the north, east, and west, and is likely associated with leaks from former USTs and ASTs that were located to the northeast of the service building. Petroleum contamination at RTN002 appears mostly delineated to the east, south, and west but could not be bounded to the north because of proximity to the site’s northern boundary line. Elevated levels of arsenic, chromium, and lead were detected in groundwater in RTN001, RTN003, and RTN004. Chromium and lead were present in the total, rather than dissolved, analytical results and were considered unlikely to be representative of actual groundwater contaminant concentrations. Elevated arsenic may have been caused by organic, soil- induced oxidation-reduction conditions, as organic matter was observed during sample collection. Vinyl chloride (VC) was also detected above its MTCA CUL in one groundwater sample. However, based on Ecology’s Statistical Guidance for Ecology Site Managers (Ecology, 19925) the site-wide VC data set meets requirements to demonstrate compliance. Additionally, VC was not detected in sample locations in the vicinity of the exceedance, indicating the presence of VC is likely isolated. All analytical results for the Phase II ESA are presented in Table C-1 (soil) and Table C-2 (groundwater). Based on the results of this Phase II ESA, metals and chlorinated acid herbicides were no longer considered contaminants of concern (COCs) for soil, and TPH-G, metals except arsenic, VOCs, and chlorinated acid herbicides were no longer considered COCs for groundwater. 5 Washington State Department of Ecology (Ecology), 1992, Statistical Guidance for Ecology Site Managers: Report prepared by Mr. Nigel Blakley, Mr. Greg Glass, Ms. Connie Travers, PTI Environmental Services, and Ecology’s Toxics Cleanup Program, August. South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 C-4APPENDIX C: PREVIOUS SITE INVESTIGATION DATAA supplemental ESA was recommended to further delineate the extent of contamination and evaluate groundwater flow direction. C.5 2019 SUPPLEMENTAL ENVIRONMENTAL SITE ASSESSMENT The Supplemental ESA investigation plan was developed concurrently with the previous property owner’s environmental consultant and focused on evaluating groundwater flow direction and extent of contamination (Shannon & Wilson, 20196). Shannon & Wilson oversaw the advancement and sampling of seven exploratory borings, as well as the installation, development, and sampling of seven new groundwater monitoring wells. Soil samples were analyzed for TPH-G, TPH-D, TPH-O, VOCs, PAHs, volatile petroleum hydrocarbons, extractable petroleum hydrocarbons, and/or total organic carbons, depending on where they were collected from. Groundwater samples were analyzed for TPH-D, TPH-O, and total and dissolved arsenic. Groundwater flow at the site was determined to be predominately to the west. However, a southerly flow component was identified near the westernmost portion of the site (Figure C-3). Additionally, information collected during the Phase I and Phase II ESAs suggests site flow patterns may be complex and variable (see the Hydrogeology section for a more detailed discussion of this topic). None of the soil samples contained MTCA CUL exceedances for the analyzed contaminants. TPH-D and TPH-O MTCA exceedances were detected in groundwater samples from MW-1 (north of the RTN002 body shop) and MW-4 (inside the RTN001 services shop). Dissolved arsenic was also detected above its MTCA CUL in four wells (MW-1, MW-2, MW-5, and MW-7). Analytical results for the Supplemental ESA are presented in Table C-3 (soil) and Table C-4 (groundwater). Based on the analytical results of the Supplemental ESA it was determined that contaminants of concern for both soil and groundwater were TPH-D and TPH-O. Arsenic was not considered a contaminant of concern in groundwater because analysis of oxidation reduction potential readings versus pH indicated the exceedances were likely caused by a negative shift in Eh and pH. This shift was likely caused by petroleum hydrocarbon releases and/or the high soil organic content measured throughout the site. 6 Shannon & Wilson, 2019, Supplemental environmental site assessment, Sound For Renton (Sound Transit ROW nos. RTN001-RTN004), Renton, Washington: report prepared by Shannon & Wilson, Seattle Wash., for Miller Nash Graham & Dunn LLP, Seattle, Wash., project no. 102225-001, June 28. South Renton Transit CenterEnvironmental Letter Report 104059-202 December 9, 2021 C-5APPENDIX C: PREVIOUS SITE INVESTIGATION DATADuring completion of the Shannon & Wilson studies described above, it was unclear who would be responsible for site cleanup (Sound Transit or the previous property owner). It is our current understanding that Sound Transit will complete site remediation. Based on conversations with Sound Transit, we recommended the investigation described in this report to fill in existing data gaps and inform remedial design. Additional Environmental SamplingSound Ford PropertyRenton, WashingtonTable C-1 - 2018 Phase II ESA Soil Analytical ResultsExploration Designation:Sample NumberSample Depth (feet)Date SampledAnalytical Report NumberANALYTEPetroleum Hydrocarbons (mg/kg)Gasoline Range Organics <7.4 <6.924<6.8 <6.2 <6.8 <4.4 <9.3 NA NA <8.5 <7 <6 <6.1 NA <4.1 <8.7 <9.7 <7.4Diesel Range Organics <37 <33 <2,800 <150 <33 <34 <290 <36240 3,900<3639<31 <32 <37 <28 <37 <52 <180Lube Oil Range Organics <74 <6616,000 630<67 <682,000 180 1,700 28,000<7396<62 <64 <75100<73290 530Arsenic <15 <13 <11 NA <13 <14 <11 <15 NA NA <15 <14 NA NA NA NA NA <16 <14Barium NA NA NA NA100 85 51 84NA NA130 75NA NA NA NA NA140 110Cadmium <0.74 <0.66 <0.55 NA <0.66 <0.68 <0.57 <0.73 NA NA <0.73 <0.68 NA NA NA NA NA <0.81 <0.72Chromium46 40 21NA47 43 29 37NA NA52 42NA NA NA NA NA45 42Copper NA NA NA NA NA NA NA NA NA14NA NA NA NA NA NA NA NA NALead <7.4 <6.613NA8.6<6.819<7.3 NA NA17<6.8 <6.2 <6.4 NA8.2<7.344 13Mercury<0.37 <0.33 <0.28 NA <0.33 <0.34 <0.29 <0.36 NA NA <0.36 <0.34 NA NA NA NA NA <0.41 <0.36Nickel NA NA NA NA NA NA NA NA NA20NA NA NA NA NA NA NA NA NASelenium NA NA NA NA <13 <14 <11 <15 NA NA <15 <14 NA NA NA NA NA <16 <14Silver NA NA NA NA <1.3 <1.4 <1.1 <1.5 NA NA <1.5 <1.4 NA NA NA NA NA <1.6 <1.4Zinc NA NA NA NA NA NA NA NA NA40NA NA NA NA NA NA NA NA NACarcinogenic Polycyclic Aromatic Hydrocarbons (cPAHs) (mg/kg)Benz[a]anthracene NA NA <0.15 <0.0081 NA NA <0.076 <0.0097 <0.041 <0.16 NA <0.0091 NA NA NA <0.0074 NA <0.022 <0.0096Benzo(a)pyrene NA NA <0.15 <0.0081 NA NA <0.076 <0.0097 <0.041 <0.079 NA <0.0091 NA NA NA0.026NA <0.022 <0.0096Benzo(b)fluoranthene NA NA <0.15 <0.0081 NA NA <0.076 <0.0097 <0.041 <0.079 NA <0.0091 NA NA NA0.042NA <0.022 <0.0096Benzo(j,k)fluoranthene NA NA <0.15 <0.0081 NA NA <0.076 <0.0097 <0.041 <0.079 NA <0.0091 NA NA NA0.0082NA <0.022 <0.0096Chrysene NA NA0.3<0.0081 NA NA <0.076 <0.0097 <0.041 <0.16 NA <0.0091 NA NA NA0.013NA0.031 0.01Dibenzo(a,h)anthracene NA NA <0.15 <0.0081 NA NA <0.076 <0.0097 <0.041 <0.079 NA <0.0091 NA NA NA <0.0074 NA <0.022 <0.0096Indeno(1,2,3-cd)pyrene NA NA <0.15 <0.0081 NA NA <0.076 <0.0097 <0.041 <0.079 NA <0.0091 NA NA NA0.022NA <0.022 <0.0096TEF-adjusted cPAHs NA NA0.04<0.01 NA NA <0.069 <0.0088 <0.037 <0.076 NA <0.0082 NA NA NA0.035NA0.02 0.086Volatile Organic Compounds (VOCs) (mg/kg)Acetone0.056 0.054<0.00490.18 0.061 0.068 0.0096 0.16 0.052<0.330.015 0.037 0.0055 0.017 0.027 0.047 0.21 0.1 0.0752-Butanone0.0061 0.0059<0.00490.031 0.014 0.0170.00520.025 0.0068<0.33 <0.00660.0088<0.0054 <0.0049 <0.00520.006 0.027 0.016 0.0131,2,4-Trimethylbenzene <0.0011 <0.000913.4 0.0036<0.0011 <0.0011 <0.001 <0.00150.0063 1.2<0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 NA NA1,2-Dichlorobenzene <0.0011 <0.00091 <0.062 <0.0012 <0.0011 <0.0011 <0.001 <0.00150.0026 0.3<0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 NA NA1,3,5-Trimethylbenzene <0.0011 <0.000910.82<0.0012 <0.0011 <0.0011 <0.001 <0.00150.0015<0.066 <0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 NA NABenzene <0.0011 <0.000910.0016<0.0012 <0.0011 <0.0011 <0.001 <0.0015 <0.001 <0.066 <0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 NA NACarbon Disulfide NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <0.0011 <0.0012Ethylene dibromide (EDB)<0.0011 <0.00091 <0.00097 <0.0012 <0.0011 <0.0011 <0.001 <0.0015 <0.001 <0.066 <0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 <0.0011 <0.00121,2-Dichloroethane (EDC)<0.0011 <0.00091 <0.00097 <0.0012 <0.0011 <0.0011 <0.001 <0.0015 <0.001 <0.066 <0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 <0.0011 <0.0012Methyl t-Butyl Ether (MTBE)<0.0011 <0.00091 <0.00097 <0.0012 <0.0011 <0.0011 <0.001 <0.0015 <0.001 <0.066 <0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 <0.0011 <0.0012Ethylbenzene <0.0011 <0.000910.16<0.0012 <0.0056 <0.0055 <0.001 <0.0015 <0.0051 <0.33 <0.0066 <0.0053 <0.0054 <0.0049 <0.0052 <0.00087 <0.0017 NA NAm, p-Xylene <0.0055 0.00450.26<0.0059 <0.0056 <0.0055 <0.0052 <0.0077 <0.0051 <0.33 <0.0066 <0.0053 <0.0054 <0.0049 <0.0052 <0.0044 <0.0085 NA NANaphthalene <0.0011 <0.000911<0.0012 <0.0011 <0.0011 <0.001 <0.0015 <0.001 <0.066 <0.0013<0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 <0.12 <0.0012n-Butylbenzene <0.0011 <0.00091 <0.062 <0.0012 <0.0011 <0.0011 <0.001 <0.00150.0018 0.36<0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 NA NAn-Propylbenzene <0.0011 <0.000910.57<0.0012 <0.0011 <0.0011 <0.001 <0.0015 <0.001 <0.066 <0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 NA NAo-Xylene <0.0011 <0.000910.013<0.0012 <0.0056 <0.0055 <0.001 <0.0015 <0.0051 <0.33 <0.0066 <0.0053 <0.0054 <0.0049 <0.0052 <0.00087 <0.0017 NA NAp-Isopropyltoluene <0.0011 <0.00091 <0.062 <0.0012 <0.0011 <0.0011 <0.001 <0.0015 <0.0010.17<0.0013 <0.0011 0.0011 <0.00097 <0.001 <0.00087 <0.0017 NA NAIsopropylbenzene <0.0011 <0.000910.017<0.0012 <0.0011 <0.0011 <0.001 <0.0015 <0.001 <0.066 <0.0013 <0.0011 <0.0011 <0.00097 <0.001 <0.00087 <0.0017 NA NAPolychlorinated Biphenyls (PCBs) (mg/kg)PCB-aroclor 1016 NA NA <0.055 <0.06 NA NA <0.057 <0.073 <0.062 <0.059 NA <0.068 NA NA NA <0.056 NA <0.081 <0.072PCB-aroclor 1221 NA NA <0.055 <0.06 NA NA <0.057 <0.073 <0.062 <0.059 NA <0.068 NA NA NA <0.056 NA <0.081 <0.072PCB-aroclor 1232 NA NA <0.055 <0.06 NA NA <0.057 <0.073 <0.062 <0.059 NA <0.068 NA NA NA <0.056 NA <0.081 <0.072PCB-aroclor 1242 NA NA <0.055 <0.06 NA NA <0.057 <0.073 <0.062 <0.059 NA <0.068 NA NA NA <0.056 NA <0.081 <0.072PCB-aroclor 1248 NA NA <0.055 <0.06 NA NA <0.057 <0.073 <0.062 <0.059 NA <0.068 NA NA NA <0.056 NA <0.081 <0.072PCB-aroclor 1254 NA NA <0.055 <0.06 NA NA <0.057 <0.073 <0.062 <0.059 NA <0.068 NA NA NA <0.056 NA <0.081 <0.072PCB-aroclor 1260 NA NA <0.055 <0.06 NA NA <0.057 <0.073 <0.062 <0.059 NA <0.068 NA NA NA <0.056 NA <0.081 <0.072Notes:1. All soil sample results are expressed in milligrams per kilogram (mg/kg).2.Bold values indicate a detection above the laboratory reporting limit.3. Orange indicates value is above the preliminary screening level* Cleanup criteria is 100 mg/kg when benzene is not present. Cleanup criteria is 30 mg/kg when benzene is present.** Cleanup criteria is 19 mg/kg for chromium (VI) and 2,000 mg/kg for chromium (III).RTN001-3 RTN001-46132/7/2018RTN001-1:6.0 RTN001-1:12.5 RTN001-2:9.5 RTN001-2:13.0 RTN001-3:5.0 RTN001-3:8.0 RTN001-4:6.0 RTN001-4:12.0RTN001-5 RTN001-6 RTN001-7 RTN001-8 RTN001-9 RTN001-10RTN001-1 RTN001-26 12.5 9.5 13 5 8RTN001-8:10.0 RTN001-9:5.0 RTN001-9:12.0 RTN001-10:5.5RTN001-5:6.5 RTN001-5:10.5 RTN001-6:5.086.5 10.5 5 12 7 11RTN001-6:12.0 RTN001-7:7.0 RTN001-7:11.02/8/2018 2/8/2018 2/8/2018 2/8/2018RTN001-10:12.02/7/2018 2/7/20182/8/2018 2/8/2018 2/8/2018 2/8/2018 2/9/2018 2/9/201839.59.5 52/7/2018 2/8/20181802-099 1802-099 1802-076 1802-0761802-099 1802-076 1802-0762/8/2018 2/8/2018 2/7/2018 2/7/20181802-099 1802-0991802-099 1802-099 1802-099< = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limit; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act; NA = not analyzed; NE = MTCA cleanup criteria not established for this analyte; RCRA = Resource Conservation and Recovery Act; TEF = Toxicity Equivalency Factor4. Only detected VOCs are shown.MTCA-5/RCRA-8 Metals (mg/kg)1802-076 1802-0761802-076 1802-076 1802-076 1802-076 1802-099104059-202 Page 1 of 2104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtonTable C-1 - 2018 Phase II ESA Soil Analytical ResultsExploration Designation:Sample NumberSample Depth (feet)Date SampledAnalytical Report NumberANALYTEPetroleum Hydrocarbons (mg/kg)Gasoline Range Organics <5.2 U <10 U NA NA <4.2 U <6.4 U <26 U <28 U <22 U <27 U <5.1 U 100/30* NEDiesel Range Organics650<40 U <28 U <35 U <28 U <32 U1,700<71 U <54 U72<28 U 2000 NELube Oil Range Organics2,300 140 67<71 U70<65 U2,500<140 U <110 U220 3402000 NEArsenic <12 U <16 U NA NA NA NA NA NA NA NA <11 U 20 24Barium NA NA NA NA NA NA NA NA NA NA62NE 16,000Cadmium <0.59 U <0.79 U NA NA NA NA NA NA NA NA <0.56 U 2 80Chromium27 46NA NA NA NA NA NA NA NA4419/2,000** 80Copper NA NA NA NA NA NA NA NA NA940NA NE 120,000Lead64<7.9UNA NANANANANANANA<5.6U250 NEMercury<0.29U<0.4UNA NANANANANANANA<0.28U2 NENickel NA NA NA NA NA NA NA NA NA210NA NE 1,600Selenium NA NA NA NA NA NA NA NA NA NA <11 U NE 400Silver NA NA NA NA NA NA NA NA NA NA <1.1 U NE 400Zinc NA NA NA NA NA NA NA NA NA1,600NA NE 24,000Carcinogenic Polycyclic Aromatic Hydrocarbons (cPAHs) (mg/kg)Benz[a]anthracene <0.16 U <0.011 U <0.0074 U NA <0.0075 U NA0.037NA NA <0.0091 U <0.0074 U NE NEBenzo(a)pyrene <0.16 U <0.011 U <0.0074 U NA <0.0075 U NA0.031NA NA <0.0091 U <0.0074 U 0.1 NEBenzo(b)fluoranthene <0.16 U <0.011 U <0.0074 U NA <0.0075 U NA0.044NA NA <0.0091 U <0.0074 U NE NEBenzo(j,k)fluoranthene <0.16 U <0.011 U <0.0074 U NA <0.0075 U NA0.015NA NA <0.0091 U <0.0074 U NE NEChrysene0.34<0.011 U0.062NA0.0076NA0.056NA NA <0.0091 U0.021NE NEDibenzo(a,h)anthracene <0.16 U <0.011 U <0.0074 U NA <0.0075 U NA0.0089NA NA <0.0091 U <0.0074 U NE NEIndeno(1,2,3-cd)pyrene <0.16 U <0.011 U <0.0074 U NA <0.0075 U NA0.029NA NA <0.0091 U <0.0074 U NE NETEF-adjusted cPAHs0.14<0.01 U0.0073NA NA NA0.047NA NA <0.0082 U0.00690.1 NEVolatile Organic Compounds (VOCs) (mg/kg)Acetone0.14 0.15 0.0053 0.11 0.099 0.058 0.036 0.045 0.023 0.3<0.0047 NE 72,0002-Butanone0.02 0.025<0.00420.026 0.014 0.0094<0.0042 <0.0055 <0.00380.052<0.0047 0.1 0.11,2,4-Trimethylbenzene NA NA NA NA NA NA NA NA NA NA NA NE NE1,2-Dichlorobenzene NA NA NA NA NA NA NA NA NA NA NA NE NE1,3,5-Trimethylbenzene NA NA NA NA NA NA NA NA NA NA NA NE NEBenzene NA NA NA NA NA NA NA NA NA NA NA NE NECarbon Disulfide <0.00088 <0.0018 <0.0011 <0.0015 <0.001 <0.00120.0038<0.0011 <0.000770.00240.00095 NE 8,000Ethylene dibromide (EDB)<0.00088 <0.0018 <0.00085 <0.0011 <0.0007 <0.0012 <0.00084 <0.0011 <0.00077 <0.0012 0.00095 6 8,0001,2-Dichloroethane (EDC)<0.00088 <0.0018 <0.00085 <0.0011 <0.0007 <0.0012 <0.00084 <0.0011 <0.00077 <0.0012 0.00095 6 8,000Methyl t-Butyl Ether (MTBE)<0.00088 <0.0018 <0.00085 <0.0011 <0.0007 <0.0012 <0.00084 <0.0011 <0.00077 <0.0012 0.00095 0.1 6,400Ethylbenzene NA NA NA NA NA NA NA NA NA NA NA NE NEm, p-Xylene NA NA NA NA NA NA NA NA NA NA NA NE NENaphthalene <0.065 <0.0018 <0.00085 <0.00110.0043<0.0012 <0.00084 <0.0011 <0.00077 <0.084 <0.00095 5 160n-Butylbenzene NA NA NA NA NA NA NA NA NA NA NA NE NEn-Propylbenzene NA NA NA NA NA NA NA NA NA NA NA NE NEo-Xylene NA NA NA NA NA NA NA NA NA NA NA NE NEp-Isopropyltoluene NA NA NA NA NA NA NA NA NA NA NA NE NEIsopropylbenzene NA NA NA NA NA NA NA NA NA NA NA NE NEPolychlorinated Biphenyls (PCBs) (mg/kg)PCB-aroclor 1016 <0.059 <0.079 <0.055 NA <0.056 NA <0.064 NA NA <0.068 <0.056PCB-aroclor 1221 <0.059 <0.079 <0.055 NA <0.056 NA <0.064 NA NA <0.068 <0.056PCB-aroclor 1232 <0.059 <0.079 <0.055 NA <0.056 NA <0.064 NA NA <0.068 <0.056PCB-aroclor 1242 <0.059 <0.079 <0.055 NA <0.056 NA <0.064 NA NA <0.068 <0.056PCB-aroclor 1248 <0.059 <0.079 <0.055 NA <0.056 NA <0.064 NA NA <0.068 <0.056PCB-aroclor 1254 <0.059 <0.079 <0.055 NA <0.056 NA0.74NA NA0.57<0.056PCB-aroclor 1260 <0.059 <0.079 <0.055 NA <0.056 NA0.24NA NA0.11<0.056Notes:1. All soil sample results are expressed in milligrams per kilogram (mg/kg).2.Bold values indicate a detection above the laboratory reporting limit.3. Orange indicates value is above the preliminary screening level* Cleanup criteria is 100 mg/kg when benzene is not present. Cleanup criteria is 30 mg/kg when benzene is present.** Cleanup criteria is 19 mg/kg for chromium (VI) and 2,000 mg/kg for chromium (III).MTCA Method A Soil Cleanup Levels (mg/kg)MTCA Method B Soil Cleanup Levels (mg/kg)RTN001-11 RTN002-1 RTN002-2 RTN002-3 RTN002-4 RTN003-1RTN002-4:5.0 RTN002-4:6.2 RTN003-1:4.0RTN001-11:11.0 RTN002-1:4.0 RTN002-1:10.5 RTN002-2:4.0 RTN002-2:7.5 RTN002-3:4.76RTN002-3:9.0112/9/2018 2/9/2018RTN001-11:3.02/7/2018 2/7/2018 2/8/2018 2/8/201811 11 1113 6.5 10.5 5 12 72/9/2018 2/9/2018 2/9/2018 2/9/2018 2/9/20181802-0991NE4. Only detected VOCs are shown.< = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limit; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act; NA = not analyzed; NE = MTCA cleanup criteria not established for this analyte; RCRA = Resource Conservation and Recovery Act; TEF = Toxicity Equivalency Factor1802-1161802-116 1802-116 1802-099 1802-099 1802-116 1802-1161802-076 1802-076 1802-099104059-202 Page 2 of 2104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtonTable C-2 - 2018 Phase II ESA Groundwater Analytical ResultsExploration Designation:Sample NumberDate SampledAnalytical Report NumberANALYTEPetroleum Hydrocarbons (μg/L)Gasoline Range Organics <100 <100 <100 <100 NA <100 <100 NA <100 <100 <100Diesel Range Organics <270 <290320<2703,300 970 820 480 280 420<290Lube Oil Range Organics <4302,800<440 <43016,000 1,800 540 590<440740<460MTCA-5, RCRA-8, PPL Metals - Total (μg/L)Antimony NA NA NA NA NA NA <5.6 NA NA NA NAArsenic56 22 15 23NA <3.313NA NA17 26BariumNA NA42 74NA38NA NA NA55NABeryllium NA NA NA NA NA NA <11 NA NA NA NACadmium <4.4 <4.4 <4.4 <4.4 NA <4.4 <4.4 NA NA <4.4 <4.4Chromium12 170<1114NA <1120NA NA <11 <11Copper NA NA NA NA NA NA18NA NA NA NALead1.8 25<1.16.3NA <1.12.5NA4.4 1.9 1.2Mercury <0.5 <0.5 <0.5 <0.5 NA <0.5 <0.5 NA NA <0.5 <0.5Nickel NA NA NA NA NA NA <22 NA NA NA NASelenium NA NA <5.6 <5.6 NA <5.6 <5.6 NA NA <5.6 NASilver NA NA <11 <11 NA <11 <11 NA NA <11 NAThallium NA NA NA NA NA NA <5.6 NA NA NA NAZinc NA NA NA NA NA NA <28 NA NA NA NAMTCA-5, RCRA-8, PPL Metals - Dissolved (μg/L)Antimony NA NA NA NA NA NA <5 NA NA NA NAArsenic30<313 15NA <36.4NA NA7.3 4.8Barium NA NA <25 <25 NA <25 NA NA NA <25 NABeryllium NA NA NA NA NA NA <10 NA NA NA NACadmium <4<4<4<4NA<4<4NANA<4<4Chromium <10 <10 <10 <10 NA <10 <10 NA NA <10 <10Copper NA NA NA NA NA NA <10 NA NA NA NALead <1 <1 <1 <1 NA <1 <1 NA <1 <1 <1Mercury <0.5 <0.5 <0.5 <0.5 NA <0.5 <0.5 NA NA <0.5 <0.5Nickel NA NA NA NA NA NA <20 NA NA NA NASelenium NA NA <5 <5 NA <5 <5 NA NA <5 NAThallium NA NA NA NA NA NA <5 NA NA NA NASilver NA NA <10 <10 NA <10 <10 NA NA <10 NAZinc NA NA NA NA NA NA <25 NA NA NA NAVolatile Organic Compounds (μg/L)Acetone <5 <5 <5 <5 <5 <5 <5 <5 <530 7Carbon disulfide NA NA NA NA NA NA NA NA NA NA NAEthylene dibromide (EDB) <0.00097 <0.01 <0.0096 <0.0097 <0.0097 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2Methyl t-Butyl Ether (MTBE) <0.20.2<0.2 <0.2 <0.2 <0.2 <0.2 <0.20.28<0.2 <0.21,2-Dichloroethane (EDC) <0.20.2<0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2Ethylbenzene <0.20.8<0.2 <0.20.2<0.2 <0.2 <0.2 <0.2 <0.2 <0.2m, p-Xylene <0.41.4<0.4 <0.41.2<0.4 <0.4 <0.4 <0.4 <0.4 <0.4o-Xylene <0.20.28<0.2 <0.21<0.2 <0.2 <0.2 <0.2 <0.2 <0.2n-Propylbenzene <0.20.56<0.2 <0.20.26<0.2 <0.2 <0.2 <0.2 <0.2 <0.21,3,5-Trimethylbenzene <0.20.24<0.2 <0.20.98<0.2 <0.2 <0.2 <0.2 <0.2 <0.21,2,4-Trimethylbenzene <0.23<0.2 <0.26.2 0.33 0.23<0.2 <0.2 <0.2 <0.2Naphthalene <11.8<1 <1 <1 <1 <1 <1 <1 <1 <1Vinyl Chloride <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.20.33<0.2Chlorinated Acid HerbicidesNA NA NA NA NA NA NA NA NA NA NANOTES:Values reported in micrograms per liter (μg/L)Bold indicates analyte detected< = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limit; μg/L = micrograms per liter; MTCA = Model Toxics Control Act; ; NA = analyte not analyzed for; NE = Cleanup level not establishedRTN001-9:GW RTN001-10:GW RTN001-11:GWRTN001-8 RTN001-9 RTN001-10 RTN001-11RTN001-1:GW RTN001-2:GW RTN001-3:GW RTN001-4:GW RTN001-5:GW2/8/2018 2/8/2018 2/9/2018 2/7/2018 2/8/2018 2/7/2018 2/7/2018 2/7/20181802-099 1802-099 1802-076 1802-076 1802-0761802-076 1802-076 1802-099 1802-076 1802-099RTN001-1 RTN001-2 RTN001-3 RTN001-4 RTN001-5 RTN001-6 RTN001-71802-0992/8/2018 2/8/2018 2/8/2018RTN001-6:GW RTN001-7:GW RTN001-8:GWOrange indicates value is above the preliminary screening level104059-202 Page 1 of 2 104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtonTable C-2 - 2018 Phase II ESA Groundwater Analytical ResultsExploration Designation:Sample NumberDate SampledAnalytical Report NumberANALYTEPetroleum Hydrocarbons (μg/L)Gasoline Range Organics NA <100 <110 <100 <100 <100 <0.11 <100 1,000/800* NEDiesel Range Organics640 410 300<260 <260 <260 <260 <270 500 NELube Oil Range Organics1,200 570<450 <420 <420 <420 <420 <430 500 NEMTCA-5, RCRA-8, PPL Metals - Total (μg/L)Antimony NA NA NA NA NA <5.6 NA NA NE 6.4Arsenic NANANANANA8.4NA15054.8BariumNA NA NA NA NA NA NA NA NE 3,200Beryllium NA NA NA NA NA <11 NA NA NE 32Cadmium NANANANANA<4.4NA5.258Chromium NA NA NA NA NA35NA31050 NECopper NA NA NA NA NA32NA NA NE 640Lead NA NA NA NA NA11NA250015 NEMercury NANANANANA<0.5NA0.72NENickel NA NA NA NA NA29NA NA NE 320Selenium NA NA NA NA NA <5.6 NA NA NE 80Silver NA NA NA NA NA <11 NA NA NE 80Thallium NA NA NA NA NA <5.6 NA NA NE 0.16Zinc NA NA NA NA NA67NA NA NE 4,800MTCA-5, RCRA-8, PPL Metals - Dissolved (μg/L)Antimony NA NA NA NA NA <5 NA NA NE 6.4Arsenic NANANANANA <3NA2054.8Barium NA NA NA NA NA NA NA NA NE 3,200Beryllium NA NA NA NA NA <10 NA NA NE 32Cadmium NANANANANA <4NA <45 8Chromium NA NA NA NA NA <10 NA <10 50 NECopper NA NA NA NA NA <10 NA NA NE 640Lead NA NA NA NA NA <1 NA1.115 NEMercury NANANANANA<0.5NA<0.52 NENickel NA NA NA NA NA <20 NA NA NE 320Selenium NA NA NA NA NA <5 NA NA NE 80Thallium NA NA NA NA NA <5 NA NA NE 80Silver NA NA NA NA NA <10 NA NA NE 0.16Zinc NA NA NA NA NA <25 NA NA NE 4,800Volatile Organic Compounds (μg/L)Acetone <5 <5 <5 NA NA NA NA NA NE 7,200Carbon disulfide NA NA NA <0.2 <0.2 <0.2 <0.20.26NE 800Ethylene dibromide (EDB) <0.2 NA <0.2 NA NA NA NA NA 0.01 72Methyl t-Butyl Ether (MTBE) <0.2 NA <0.2 NA NA NA NA NA 20 NE1,2-Dichloroethane (EDC) <0.2 NA <0.2 NA NA NA NA NA 5 48Ethylbenzene <0.2 <0.2 <0.2 NA NA NA NA NA 700 800m, p-Xylene <0.40.64<0.40.49<0.40.59<0.4 <0.4 1,000 1,600o-Xylene <0.20.25<0.2 <0.2 <0.20.22<0.2 <0.2 1,000 1,600n-Propylbenzene <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 NE 8001,3,5-Trimethylbenzene <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 NE 801,2,4-Trimethylbenzene0.26 0.29<0.2 <0.2 <0.20.3 0.21<0.2 NE NENaphthalene <1 <1 <1 NA NA NA NA NA 160 160Vinyl Chloride <0.2 <0.2 <0.2 NA NA NA NA NA 0.2 24Chlorinated Acid HerbicidesNA NA NA NA NA ND ND ND NE NENOTES:Values reported in micrograms per liter (μg/L)Bold indicates analyte detected< = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limit; μg/L = micrograms per liter; MTCA = Model Toxics Control Act; ; NA = analyte not analyzed for; NE = Cleanup level not establishedRTN004-1RTN004-1:GWRTN002-2:GW RTN002-3:GW RTN002-4:GW RTN003-1:GW RTN003-2:GW RTN003-3:GWRTN003-12/9/20182/8/2018 2/9/2018 2/9/20181802-116MTCA Method A Cleanup Levels (μg/L)MTCA Method B Cleanup Levels (μg/L)1802-116 1802-099 1802-116RTN003-2 RTN003-3RTN002-42/9/2018 2/9/2018 2/9/2018 2/9/20181802-116 1802-116 1802-116RTN002-1 RTN002-2 RTN002-31802-099RTN002-1:GWOrange indicates value is above the preliminary screening level104059-202 Page 2 of 2 104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtonTable C-3 - 2019 Supplemental ESA Soil Analytical ResultsSample LocationSample NameSample Depth (feet bgs)Sample DateGasoline Range Organics NA <12 NA <6.6 NA NA NA NA <5.6 NA NA 100/30* NEDiesel Range Organics <37 <43 <36 <240 U1 <39 <40 <28 <33 <27 <27 <36 2,000 NELube Oil Range Organics <75 <85 <721,100<79 <7986<66130<54 <73 2,000 NEC8-C10 Aliphatic NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC10-C12 Aliphatic NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC12-C16 Aliphatic NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC16-C21 Aliphatic NA NA NA98NA NA NA NA NA NA NA NE NEC21-C34 Aliphatic NA NA NA 510 NA NA NA NA NA NA NA NE NEC8-C10 Aromatic NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC10-C12 Aromatic NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC12-C16 Aromatic NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC16-C21 Aromatic NA NA NA49NA NA NA NA NA NA NA NE NEC21-C34 Aromatic NA NA NA230NA NA NA NA NA NA NA NE NEC5-C6 Aliphatics NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC6-C8 Aliphatics NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC8-C10 Aliphatics NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC10-C12 Aliphatics NA NA NA <5.0 NA NA NA NA NA NA NA NE NEC8-C10 Aromatics NANANA<5.0NANANANANANANANE NEC10-C12 Aromatics NANANA<5.0NANANANANANANANE NEC12-C13 Aromatics NANANA<5.0NANANANANANANANE NE1-Methylnaphthalene NA <0.011 NA <0.0082 NA NA NA NA <0.0072 NA NA NE 5,6002-Methylnaphthalene NA0.012NA <0.0082 NA NA NA NA <0.0072 NA NA NE 320Acenaphthene NA <0.011 NA0.0084NA NA NA NA <0.0072 NA NA NE 4,800Acenaphthylene NA <0.011 NA <0.0082 NA NA NA NA <0.0072 NA NA NE NEAnthracene NA <0.011 NA <0.0082 NA NA NA NA <0.0072 NA NA NE 24,000Benz[a]anthracene NA <0.011 NA <0.041 NA NA NA NA <0.0072 NA NA NE NEBenzo(a)pyrene NA <0.011 NA <0.041 NA NA NA NA <0.0072 NA NA 0.1 NEBenzo(b)fluoranthene NA <0.011 NA <0.041 NA NA NA NA <0.0072 NA NA NE NEBenzo(ghi)perylene NA <0.011 NA <0.041 NA NA NA NA <0.0072 NA NA NE NEBenzo(j,k)fluoranthene NA <0.011 NA <0.041 NA NA NA NA <0.0072 NA NA NE NEChrysene NA <0.011 NA <0.041 NA NA NA NA0.01NA NA NE NEDibenzo(a,h)anthracene NA <0.011 NA <0.041 NA NA NA NA <0.0072 NA NA NE NEFluoranthene NA <0.011 NA <0.0082 NA NA NA NA <0.0072 NA NA NE 3,200Fluorene NA <0.011 NA <0.0082 NA NA NA NA <0.0072 NA NA NE 3,200Indeno(1,2,3-cd)pyrene NA <0.011 NA <0.041 NA NA NA NA <0.0072 NA NA NE NENaphthalene NA <0.011 NA <0.0082 NA NA NA NA <0.0072 NA NA 5 1,600Phenanthrene NA <0.011 NA <0.0082 NA NA NA NA <0.0072 NA NA NE NEPyrene NA <0.011 NA <0.014 U1 NA NA NA NA <0.0072 NA NA NE 2,400MW-4:11.5 MW-4:16MW-4 MW-5 MW-6MW-1 MW-2 MW-3MW-1-8.5 MW-2-9.0 MW-3-8.58.5 9.0 8.5 11.5 16.0ANALYTEPetroleum Hydrocarbons (mg/kg)Extractable Petroleum Hydrocarbons (EPHs) (mg/kg)5/2/2019 5/3/20194/18/2019 4/18/2019 4/18/2019 5/3/2019 5/3/2019 5/3/2019 5/2/2019 5/2/2019 5/2/2019MTCA Method A Unrestricted Land UseMTCE Method B Noncancer6.5 14.0 8.0 14.0 8.5MW-5:6.5MW-716.0MW-5:14 MW-6:8 MW-6:14 MW-7:8.5DUP-1Volatile Petroleum Hydrocarbons (VPHs) (mg/kg)Polycyclic Aromatic Hydrocarbons (PAHs) (mg/kg)104059-202 Page 1 of 3104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtonTable C-3 - 2019 Supplemental ESA Soil Analytical ResultsSample LocationSample NameSample Depth (feet bgs)MW-4:11.5 MW-4:16MW-4 MW-5 MW-6MW-1 MW-2 MW-3MW-1-8.5 MW-2-9.0 MW-3-8.58.5 9.0 8.5 11.5 16.0MTCA Method A Unrestricted Land MTCE Method B 6.5 14.0 8.0 14.0 8.5MW-5:6.5MW-716.0MW-5:14 MW-6:8 MW-6:14 MW-7:8.5DUP-11,1,1,2-Tetrachloroethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 2,4001,1,1-Trichloroethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA 2 160,0001,1,2,2-Tetrachloroethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 1,6001,1,2-Trichloroethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 3201,1-Dichloroethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 16,0001,1-Dichloroethene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 16,0001,1-Dichloropropene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NE1,2,3-Trichlorobenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NE1,2,3-Trichloropropane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 3201,2,4-Trichlorobenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 8001,2,4-Trimethylbenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NE1,2-Dibromo-3-chloropropane NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE 161,2-Dichlorobenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 7,2001,2-Dichloroethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 4801,2-Dichloropropane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 7,2001,3,5-Trimethylbenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 8001,3-Dichlorobenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NE1,3-Dichloropropane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NE1,4-Dichlorobenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 5,6002,2-Dichloropropane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NE2-Butanone NA0.13NA0.0098NA NA NA NA <0.0047 NA NA NE NE2-Chloroethylvinylether NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE NE2-Chlorotoluene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NE2-Hexanone NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE NE4-Chlorotoluene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEAcetone NA0.49NA0.039NA NA NA NA <0.0094 NA NA NE 72,000Benzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 320Bromobenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEBromochloromethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEBromoform NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE 1,600Bromomethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 112Carbon Disulfide NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 8,000Carbon Tetrachloride NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 320CFC-11 NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NECFC-12 NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEChlorobenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 1,600Chloroethane NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE NEChloroform NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 800Chloromethane NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE NECis-1,2-Dichloroethene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NECis-1,3-Dichloropropene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEDibromochloromethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 1,600Dibromomethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEDichlorobromomethane NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEEthylbenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 8,000Volatile Organic Compounds (VOCs) (mg/kg)104059-202 Page 2 of 3104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtonTable C-3 - 2019 Supplemental ESA Soil Analytical ResultsSample LocationSample NameSample Depth (feet bgs)MW-4:11.5 MW-4:16MW-4 MW-5 MW-6MW-1 MW-2 MW-3MW-1-8.5 MW-2-9.0 MW-3-8.58.5 9.0 8.5 11.5 16.0MTCA Method A Unrestricted Land MTCE Method B 6.5 14.0 8.0 14.0 8.5MW-5:6.5MW-716.0MW-5:14 MW-6:8 MW-6:14 MW-7:8.5DUP-1Ethylene dibromide NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 720Hexachlorobutadiene NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE 8Isopropylbenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEm, p-Xylene NA <0.0049 NA <0.0057 NA NA NA NA <0.0047 NA NA NE 16,000Methyl Iodide NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE NEMethyl Isobutyl Ketone NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE 6,400Methyl t-Butyl Ether NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEMethylene Chloride NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE 480Naphthalene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 1,600n-Butylbenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 4,000n-Propylbenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 8,000o-Xylene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 16,000p-Isopropyltoluene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEsec-Butylbenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 8,000Styrene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 16,000tert-Butylbenzene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 8,000Tetrachloroethene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEToluene NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE 6,400Trans-1,2-Dichloroethene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NETrans-1,3-Dichloropropene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NETrichloroethene NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE NEVinyl Acetate NA <0.012 NA <0.0057 NA NA NA NA <0.0047 NA NA NE 80,000Vinyl Chloride NA <0.0025 NA <0.0011 NA NA NA NA <0.00094 NA NA NE 240Total Organic Carbon NA NA NA NA NA NA0.46H0.17NA0.68NA NE NENOTES:Bold indicates analyte detected* = Cleanup criteria is 100 mg/kg when benzene is not present. Cleanup criteria is 30 mg/kg when benzene is present.Wet Chemistry (reported in % by Volume)< = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limit; bgs = below ground surface; H = The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample results; mg/kg = milligrams per kilogram; MTCA = Model Toxics Control Act; NA = analyte not analyzed for; NE = cleanup level not established; U1 = The practical quantitation limit is elevated due to interferences present in the sample.Volatile Organic Compounds (VOCs) (mg/kg)104059-202 Page 3 of 3104059-202-L1f-Tables.xlsx - 12/8/2021 Additional Environmental SamplingSound Ford PropertyRenton, WashingtonTable C-4 - 2019 Supplemental ESA Groundwater Analytical ResultsSample LocationSample NameSample DateDiesel-Range Organics380<260 <260 <260920 990<260 <260340500 NELube-Oil-Range Organics620<410 <420 <420 <410630 N1<420 <410490500 NEArsenic (dissolved)8.8 13 16 4.5 3.5<3.010 5.0 135.0 4.8Arsenic (total)26 43 41 12 7.4 7.8 21 7.0 225.0 4.8NOTES:Bold indicates analyte detected.MW-7MTCA Method A Unrestricted Land UseMTCA Method B NoncancerMW-1-042519 MW-2-0425019 MW-102-042519 MW-3-042519 MW-4-050919 MW-104-050919 MW-5-050919MW-1 MW-2 MW-3 MW-4 MW-5 MW-6MW-6-050919 MW-7-0509194/25/2019 4/25/2019 4/25/2019 4/25/2019 5/9/2019 5/9/2019 5/9/2019 5/9/2019 5/9/2019ANALYTEPetroleum Hydrocarbons (μg/L)Metals (μg/L)Orange indicates value is above the preliminary screening level < = analyte not detected at or above the laboratory reporting limit, reported as less than the reporting limit; MTCA = Model Toxics Control Act; N1 = hydrocarbons in diesel-range are impacting lube-oil-range results; NE = cleanup level not establishedValues reported in micrograms per liter (μg/L).104059-202104059-202-L1f-Tables.xlsx - 12/8/2021 RTN001167Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN003RTN002RTN001-1RTN001-2RTN001-4RTN001-5RTN001-6RTN001-7RTN001-8RTN001-9RTN001-10RTN001-11RTN001-3RTN003-1RTN003-3RTN004-1RTN003-2RTN002-1RTN002-2RTN002-3RTN002-42018 CONTAMINATED SOILLOCATIONS0100 200Approximate Scale in FeetFilename: C:\Users\jrs\CAD Group Dropbox\JDrive\_SEA\104059\202\104059-202 Site - Soils.dwg Layout: Figure C-1 Date: 11-11-2021 Login: JRSApproximate Probe LocationFormer Underground Storage Tank (UST)Aboveground Storage Tank (AST)Existing HoistFormer HoistLEGENDRTN001-11CONTAMINANTS EXPLANATIONVOCsPCBsDiesel and lube oil-rangepetroleum hydrocarbonscPAHsCarcinogenic Polycyclic Aromatic HydrocarbonsVolatile Organic HydrocarbonsModel Toxics Control ActPolychlorinated BiphenylscPAHsVOCsMTCAPCBsDetected Above MTCADetected Below MTCA, but Abovethe Laboratory Reporting LimitNot Analyzed or Detected Abovethe Laboratory Reporting LimitNOTES1. Exceedances noted are for soil concentrations greater thanthe MTCA Method A cleanup criteria: 2,000 mg/kg forDiesel/Lube Oil, 0.10 mg/kg for cPAHs, and 1 mg/kg for PCBs.2. MTCA cleanup criteria for VOCs vary; refer to Table 2.3. MTCA-5/RCRA-8 Metals were detected in each of the soilsamples analyzed below the applicable MTCA cleanup criteria.FIG. C-1'HFHPEer 2021104059-202South Renton Transit CenterSound Transit ROW #RTN001 Through RTN004Renton, Washington RTN001167Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN003RTN002RTN001-1RTN001-2RTN001-4RTN001-5RTN001-6RTN001-7RTN001-8RTN001-9RTN001-10RTN001-11RTN001-3RTN003-1RTN003-3RTN004-1RTN003-2RTN002-1RTN002-2RTN002-3RTN002-42018 CONTAMINATEDGROUNDWATER LOCATIONSFilename: C:\Users\jrs\CAD Group Dropbox\JDrive\_SEA\104059\202\104059-202 Site - GW.dwg Layout: Figure C-2 Date: 11-11-2021 Login: JRSApproximate Probe LocationFormer Underground Storage Tank (UST)Aboveground Storage Tank (AST)Existing HoistFormer HoistLEGENDRTN001-11CONTAMINANTS EXPLANATIONVOCsMetalsDiesel and lube oil-rangepetroleum hydrocarbonsVolatile Organic HydrocarbonsModel Toxics Control ActVOCsMTCADetected Above MTCADetected Below MTCA, but Abovethe Laboratory Reporting LimitNot Analyzed or Detected Abovethe Laboratory Reporting LimitNOTES1. Exceedances noted are for groundwater concentrationsgreater than the MTCA Method A cleanup criteria: 500 μg/Lfor Diesel/Lube Oil.2. MTCA cleanup criteria for VOCs and metals vary; refer toTable 2.3. Metals results shown are the dissolved analysis.FIG. C-20100 200Approximate Scale in Feet'HFHmber 2021104059-202South Renton Transit CenterSound Transit ROW #RTN001 Through RTN004Renton, Washington RTN001Rainier Avenue SS Grady WayLake Avenue S RTN002RTN004RTN001-1RTN003-1RTN003-3RTN003-2RTN002-4MW-1MW-2MW-5MW-6RTN003RTN001-4RTN001-9MW-3MW-7RTN004-1RTN002-3RTN001-3RTN002-1RTN002-2RTN001-6RTN001-7RTN001-8RTN001-10MW-4RTN001-2RTN001-5RTN001-1118.819.019.219.4 19.6 19.8 20.0MW-1TOC25.90DTW5.70Elev.20.20MW-2TOC25.61DTW7.12Elev.18.49MW-3TOC26.85DTW7.28Elev.19.57MW-4TOC27.33DTW8.24Elev.19.09MW-5TOC26.76DTW8.04Elev.18.72MW-6TOC26.60DTW7.25Elev.19.35MW-7TOC25.79DTW5.92Elev.19.872019 POTENTIOMETRICSURFACE MAPVertical Datum is NAVD88.NOTE0100 200Approximate Scale in FeetFilename: C:\Users\jrs\CAD Group Dropbox\JDrive\_SEA\104059\202\104059-202 Potentiometry.dwg Layout: Figure C-3 Date: 11-11-2021 Login: JRSMonitoring Well LocationApproximate Potentiometric ContourEstimated Groundwater Flow DirectionApproximate Probe LocationLEGENDMW-1FIG. C-3RTN001-1120.0'HFHPber 2021104059-202South Renton Transit CenterSound Transit ROW #RTN001 Through RTN004Renton, Washington 104059-202 Appendix D Disposal Documentation Page 1 of 2 1/2021 Attachment to and part of Report: 104059-202 Date: December 9, 2021 To: Mr. Ross Stainsby Sound Transit Important Information About Your Geotechnical/Environmental Report CONSULTING SERVICES ARE PERFORMED FOR SPECIFIC PURPOSES AND FOR SPECIFIC CLIENTS. Consultants prepare reports to meet the specific needs of specific individuals. A report prepared for a civil engineer may not be adequate for a construction contractor or even another civil engineer. Unless indicated otherwise, your consultant prepared your report expressly for you and expressly for the purposes you indicated. No one other than you should apply this report for its intended purpose without first conferring with the consultant. No party should apply this report for any purpose other than that originally contemplated without first conferring with the consultant. THE CONSULTANT’S REPORT IS BASED ON PROJECT-SPECIFIC FACTORS. A geotechnical/environmental report is based on a subsurface exploration plan designed to consider a unique set of project-specific factors. Depending on the project, these may include the general nature of the structure and property involved; its size and configuration; its historical use and practice; the location of the structure on the site and its orientation; other improvements such as access roads, parking lots, and underground utilities; and the additional risk created by scope-of-service limitations imposed by the client. To help avoid costly problems, ask the consultant to evaluate how any factors that change subsequent to the date of the report may affect the recommendations. Unless your consultant indicates otherwise, your report should not be used (1) when the nature of the proposed project is changed (for example, if an office building will be erected instead of a parking garage, or if a refrigerated warehouse will be built instead of an unrefrigerated one, or chemicals are discovered on or near the site); (2) when the size, elevation, or configuration of the proposed project is altered; (3) when the location or orientation of the proposed project is modified; (4) when there is a change of ownership; or (5) for application to an adjacent site. Consultants cannot accept responsibility for problems that may occur if they are not consulted after factors that were considered in the development of the report have changed. SUBSURFACE CONDITIONS CAN CHANGE. Subsurface conditions may be affected as a result of natural processes or human activity. Because a geotechnical/environmental report is based on conditions that existed at the time of subsurface exploration, construction decisions should not be based on a report whose adequacy may have been affected by time. Ask the consultant to advise if additional tests are desirable before construction starts; for example, groundwater conditions commonly vary seasonally. Construction operations at or adjacent to the site and natural events such as floods, earthquakes, or groundwater fluctuations may also affect subsurface conditions and, thus, the continuing adequacy of a geotechnical/environmental report. The consultant should be kept apprised of any such events and should be consulted to determine if additional tests are necessary. MOST RECOMMENDATIONS ARE PROFESSIONAL JUDGMENTS. Site exploration and testing identifies actual surface and subsurface conditions only at those points where samples are taken. The data were extrapolated by your consultant, who then applied judgment to render an opinion about overall subsurface conditions. The actual interface between materials may be far more gradual or abrupt than your report indicates. Actual conditions in areas not sampled may differ from those predicted in your report. While nothing can be done to prevent such situations, you and your consultant can work together to help reduce their impacts. Retaining your consultant to observe subsurface construction operations can be particularly beneficial in this respect. Page 2 of 2 1/2021 A REPORT’S CONCLUSIONS ARE PRELIMINARY. The conclusions contained in your consultant’s report are preliminary, because they must be based on the assumption that conditions revealed through selective exploratory sampling are indicative of actual conditions throughout a site. Actual subsurface conditions can be discerned only during earthwork; therefore, you should retain your consultant to observe actual conditions and to provide conclusions. Only the consultant who prepared the report is fully familiar with the background information needed to determine whether or not the report’s recommendations based on those conclusions are valid and whether or not the contractor is abiding by applicable recommendations. The consultant who developed your report cannot assume responsibility or liability for the adequacy of the report’s recommendations if another party is retained to observe construction. THE CONSULTANT’S REPORT IS SUBJECT TO MISINTERPRETATION. Costly problems can occur when other design professionals develop their plans based on misinterpretation of a geotechnical/environmental report. To help avoid these problems, the consultant should be retained to work with other project design professionals to explain relevant geotechnical, geological, hydrogeological, and environmental findings, and to review the adequacy of their plans and specifications relative to these issues. BORING LOGS AND/OR MONITORING WELL DATA SHOULD NOT BE SEPARATED FROM THE REPORT. Final boring logs developed by the consultant are based upon interpretation of field logs (assembled by site personnel), field test results, and laboratory and/or office evaluation of field samples and data. Only final boring logs and data are customarily included in geotechnical/environmental reports. These final logs should not, under any circumstances, be redrawn for inclusion in architectural or other design drawings, because drafters may commit errors or omissions in the transfer process. To reduce the likelihood of boring log or monitoring well misinterpretation, contractors should be given ready access to the complete geotechnical engineering/environmental report prepared or authorized for their use. If access is provided only to the report prepared for you, you should advise contractors of the report’s limitations, assuming that a contractor was not one of the specific persons for whom the report was prepared, and that developing construction cost estimates was not one of the specific purposes for which it was prepared. While a contractor may gain important knowledge from a report prepared for another party, the contractor should discuss the report with your consultant and perform the additional or alternative work believed necessary to obtain the data specifically appropriate for construction cost estimating purposes. Some clients hold the mistaken impression that simply disclaiming responsibility for the accuracy of subsurface information always insulates them from attendant liability. Providing the best available information to contractors helps prevent costly construction problems and the adversarial attitudes that aggravate them to a disproportionate scale. READ RESPONSIBILITY CLAUSES CLOSELY. Because geotechnical/environmental engineering is based extensively on judgment and opinion, it is far less exact than other design disciplines. This situation has resulted in wholly unwarranted claims being lodged against consultants. To help prevent this problem, consultants have developed a number of clauses for use in their contracts, reports, and other documents. These responsibility clauses are not exculpatory clauses designed to transfer the consultant’s liabilities to other parties; rather, they are definitive clauses that identify where the consultant’s responsibilities begin and end. Their use helps all parties involved recognize their individual responsibilities and take appropriate action. Some of these definitive clauses are likely to appear in your report, and you are encouraged to read them closely. Your consultant will be pleased to give full and frank answers to your questions. The preceding paragraphs are based on information provided by the GBA, Silver Spring, Maryland Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Remedial Action Report 109693-003 February 8, 2024 %-iAPPENDIX B: WELL DECOMMISSIONING REPORTSAppendix B: Well Decommissioning ReportsAppendix B Well Decommissioning Reports Transmittal To: +PFZ"MUDIFDI Sound Transit Procurement Number Project Name Subject of Transmittal From Date: January 5, 2023 CN 0188 -21 South Transit Center Remediation Project Well Decommissioning Reports 'BTJI,IBO ERRG WE ARE SENDING: SUBMITTED FOR: ܆ Meeting Agenda ܆ Approval ܆ Meeting Minutes ܆ Your Use ܈ Deliverables ܈ As Requested ܆ Other:܆ Review and Comment DOCUMENT NAME REV. NO. STATUS $/Well Decommissioning Reports >$? , !""!#!$%!&! % '!#&(%"%)*+2+, /!"%0% 0 //. *, ., 2, ,, ,* @ *++,))"/,,0- "/,,0. " ,1,-2, $ - , - 0 !- , -"# $%&'%#"$ ( ## %&%'%( $ $) * #$$ $$ (* # "+, $#+ $- + ,./!' %'*& 'HF, % ' $ 3 !" /!"% 4 5 6 7%8 5 1'"9 "9 %/9 %9 :9 #$#%) % )$) # $# % & # &%'&%#( ) & ' ) &* & # ( & ( ' & $ ) '% &' & &*+(%'% &)' ## #& & # & &) %' & % $( * ;& "/ ;& " %"* 6 (%%/) ' '+& &A $ 3 (:") 3 (3 !" %!&! %<3%((,1,-2&=,11*&=+,+ Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004) Remedial Action Report 109693-003 February 8, 2024 &-iAPPENDIX C: LABORATORY ANALYTICAL REPORTSAppendix C: Laboratory Analytical ReportsAppendix C Laboratory Analytical Reports CONTENTS OnSite Environmental Inc., Laboratory Reference No. 2208-313 OnSite Environmental Inc., Laboratory Reference No. 2208-332 OnSite Environmental Inc., Laboratory Reference No. 2209-083 OnSite Environmental Inc., Laboratory Reference No. 2209-106 OnSite Environmental Inc., Laboratory Reference No. 2209-183 OnSite Environmental Inc., Laboratory Reference No. 2209-292 OnSite Environmental Inc., Laboratory Reference No. 2209-332 OnSite Environmental Inc., Laboratory Reference No. 2210-025 OnSite Environmental Inc., Laboratory Reference No. 2210-036 OnSite Environmental Inc., Laboratory Reference No. 2211-004 OnSite Environmental Inc., Laboratory Reference No. 2211-013 OnSite Environmental Inc., Laboratory Reference No. 2211-026 OnSite Environmental Inc., Laboratory Reference No. 2211-112 OnSite Environmental Inc., Laboratory Reference No. 2211-141 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 August 31, 2022 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 109693 Laboratory Reference No. 2208-313 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on August 30, 2022. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: August 31, 2022 Samples Submitted: August 30, 2022 Laboratory Reference: 2208-313 Project: 109693 Case Narrative Samples were collected on August 29, 2022 and received by the laboratory on August 30, 2022. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: August 31, 2022 Samples Submitted: August 30, 2022 Laboratory Reference: 2208-313 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A3-NW:5 Laboratory ID: 08-313-01 Diesel Range Organics ND 37 NWTPH-Dx 8-30-22 8-30-22 Lube Oil Range Organics ND 75 NWTPH-Dx 8-30-22 8-30-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 82 50-150 Client ID: A3-EW:6 Laboratory ID: 08-313-02 Diesel Range Organics ND 38 NWTPH-Dx 8-30-22 8-30-22 Lube Oil Range Organics ND 76 NWTPH-Dx 8-30-22 8-30-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 77 50-150 Client ID: A3-SW:5 Laboratory ID: 08-313-03 Diesel Range Organics ND 45 NWTPH-Dx 8-30-22 8-30-22 Lube Oil 100 90 NWTPH-Dx 8-30-22 8-30-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 73 50-150 Client ID: A3-WW:6 Laboratory ID: 08-313-04 Diesel Range Organics ND 34 NWTPH-Dx 8-30-22 8-30-22 Lube Oil Range Organics ND 67 NWTPH-Dx 8-30-22 8-30-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 92 50-150 Client ID: A3-Bot:8 Laboratory ID: 08-313-05 Diesel Range Organics ND 37 NWTPH-Dx 8-30-22 8-30-22 Lube Oil Range Organics ND 74 NWTPH-Dx 8-30-22 8-30-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 80 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: August 31, 2022 Samples Submitted: August 30, 2022 Laboratory Reference: 2208-313 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0830S1 Diesel Range Organics ND 25 NWTPH-Dx 8-30-22 8-30-22 Lube Oil Range Organics ND 50 NWTPH-Dx 8-30-22 8-30-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 108 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB0830S1 ORIG DUP Diesel Fuel #2 86.5 86.9 NA NA NA NA 0 NA Surrogate: o-Terphenyl 73 85 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: August 31, 2022 Samples Submitted: August 30, 2022 Laboratory Reference: 2208-313 Project: 109693 % MOISTURE Date Client ID Lab ID % Moisture Analyzed A3-NW:5 08-313-01 33 8-30-22 A3-EW:6 08-313-02 34 8-30-22 A3-SW:5 08-313-03 44 8-30-22 A3-WW:6 08-313-04 25 8-30-22 A3-Bot:8 08-313-05 32 8-30-22 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1 - Sample extract treated with a sulfuric acid/silica gel cleanup procedure. X2 - Sample extract treated with a silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Y1 - Negative effects of the matrix from this sample on the instrument caused values for this analyte in the bracketing continuing calibration verification standard (CCVs) to be outside of 20% acceptance criteria. Because of this, quantitation limits and sample concentrations should be considered estimates. 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The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC Case Narrative Samples were collected on September 9, 2022 and received by the laboratory on September 9, 2022. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. Volatiles EPA 8260D Analysis The percent recovery for Chloroethane is outside the control limits in the Spike Blank and Spike Blank Duplicate. The method allows for a percentage of the compounds to fall outside of the control limits due to the large number of analytes being spiked. Any other QA/QC issues associated with this extraction and analysis will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-SFS:10 Laboratory ID: 09-083-02 Gasoline Range Organics 150 11 NWTPH-Gx 9-12-22 9-12-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 71 69-130 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0912S1 Gasoline ND 5.0 NWTPH-Gx 9-12-22 9-12-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 87 69-130 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 09-083-02 ORIG DUP GRO 120 121 NA NA NA NA 1 30 Surrogate: Fluorobenzene 71 93 69-130 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-NW:1.5 Laboratory ID: 09-083-01 Diesel Range Organics ND 1200 NWTPH-Dx 9-12-22 9-12-22 U1 Lube Oil 7100 280 NWTPH-Dx 9-12-22 9-12-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 82 50-150 Client ID: A1-SFS:10 Laboratory ID: 09-083-02 Diesel Range Organics 2800 160 NWTPH-Dx 9-12-22 9-12-22 N Lube Oil 12000 310 NWTPH-Dx 9-12-22 9-12-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 76 50-150 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0912S1 Diesel Range Organics ND 25 NWTPH-Dx 9-12-22 9-12-22 Lube Oil Range Organics ND 50 NWTPH-Dx 9-12-22 9-12-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 89 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB0912S1 ORIG DUP Diesel Fuel #2 78.7 78.2 NA NA NA NA 1 NA Surrogate: o-Terphenyl 96 95 50-150 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-SFS:10 Laboratory ID: 09-083-02 Dichlorodifluoromethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Chloromethane ND 0.0058 EPA 8260D 9-12-22 9-12-22 Vinyl Chloride ND 0.0012 EPA 8260D 9-12-22 9-12-22 Bromomethane ND 0.0088 EPA 8260D 9-12-22 9-12-22 Chloroethane ND 0.0058 EPA 8260D 9-12-22 9-12-22 Trichlorofluoromethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 1,1-Dichloroethene ND 0.0012 EPA 8260D 9-12-22 9-12-22 Acetone 0.074 0.012 EPA 8260D 9-12-22 9-12-22 Iodomethane ND 0.011 EPA 8260D 9-12-22 9-12-22 Carbon Disulfide ND 0.0012 EPA 8260D 9-12-22 9-12-22 Methylene Chloride ND 0.0058 EPA 8260D 9-12-22 9-12-22 (trans) 1,2-Dichloroethene ND 0.0012 EPA 8260D 9-12-22 9-12-22 Methyl t-Butyl Ether ND 0.0012 EPA 8260D 9-12-22 9-12-22 1,1-Dichloroethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Vinyl Acetate ND 0.0058 EPA 8260D 9-12-22 9-12-22 2,2-Dichloropropane ND 0.0012 EPA 8260D 9-12-22 9-12-22 (cis) 1,2-Dichloroethene ND 0.0012 EPA 8260D 9-12-22 9-12-22 2-Butanone 0.011 0.0058 EPA 8260D 9-12-22 9-12-22 Bromochloromethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Chloroform ND 0.0012 EPA 8260D 9-12-22 9-12-22 1,1,1-Trichloroethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Carbon Tetrachloride ND 0.0012 EPA 8260D 9-12-22 9-12-22 1,1-Dichloropropene ND 0.0012 EPA 8260D 9-12-22 9-12-22 Benzene ND 0.0012 EPA 8260D 9-12-22 9-12-22 1,2-Dichloroethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Trichloroethene ND 0.0012 EPA 8260D 9-12-22 9-12-22 1,2-Dichloropropane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Dibromomethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Bromodichloromethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 2-Chloroethyl Vinyl Ether ND 0.013 EPA 8260D 9-12-22 9-12-22 (cis) 1,3-Dichloropropene ND 0.0012 EPA 8260D 9-12-22 9-12-22 Methyl Isobutyl Ketone ND 0.0058 EPA 8260D 9-12-22 9-12-22 Toluene ND 0.0058 EPA 8260D 9-12-22 9-12-22 (trans) 1,3-Dichloropropene ND 0.0012 EPA 8260D 9-12-22 9-12-22 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-SFS:10 Laboratory ID: 09-083-02 1,1,2-Trichloroethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Tetrachloroethene ND 0.0012 EPA 8260D 9-12-22 9-12-22 1,3-Dichloropropane ND 0.0012 EPA 8260D 9-12-22 9-12-22 2-Hexanone ND 0.0058 EPA 8260D 9-12-22 9-12-22 Dibromochloromethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 1,2-Dibromoethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Chlorobenzene 0.0014 0.0012 EPA 8260D 9-12-22 9-12-22 1,1,1,2-Tetrachloroethane ND 0.0012 EPA 8260D 9-12-22 9-12-22 Ethylbenzene 0.0012 0.0012 EPA 8260D 9-12-22 9-12-22 m,p-Xylene 0.010 0.0023 EPA 8260D 9-12-22 9-12-22 o-Xylene 0.0084 0.0012 EPA 8260D 9-12-22 9-12-22 Styrene ND 0.0012 EPA 8260D 9-12-22 9-12-22 Bromoform ND 0.0058 EPA 8260D 9-12-22 9-12-22 Isopropylbenzene 0.0038 0.0012 EPA 8260D 9-12-22 9-12-22 Bromobenzene ND 0.055 EPA 8260D 9-12-22 9-12-22 1,1,2,2-Tetrachloroethane ND 0.055 EPA 8260D 9-12-22 9-12-22 1,2,3-Trichloropropane ND 0.055 EPA 8260D 9-12-22 9-12-22 n-Propylbenzene ND 0.055 EPA 8260D 9-12-22 9-12-22 2-Chlorotoluene ND 0.055 EPA 8260D 9-12-22 9-12-22 4-Chlorotoluene ND 0.055 EPA 8260D 9-12-22 9-12-22 1,3,5-Trimethylbenzene ND 0.055 EPA 8260D 9-12-22 9-12-22 tert-Butylbenzene ND 0.055 EPA 8260D 9-12-22 9-12-22 1,2,4-Trimethylbenzene 0.12 0.055 EPA 8260D 9-12-22 9-12-22 sec-Butylbenzene 0.068 0.055 EPA 8260D 9-12-22 9-12-22 1,3-Dichlorobenzene ND 0.055 EPA 8260D 9-12-22 9-12-22 p-Isopropyltoluene 0.11 0.055 EPA 8260D 9-12-22 9-12-22 1,4-Dichlorobenzene ND 0.055 EPA 8260D 9-12-22 9-12-22 1,2-Dichlorobenzene 0.18 0.055 EPA 8260D 9-12-22 9-12-22 n-Butylbenzene 0.23 0.055 EPA 8260D 9-12-22 9-12-22 1,2-Dibromo-3-chloropropane ND 0.28 EPA 8260D 9-12-22 9-12-22 1,2,4-Trichlorobenzene ND 0.055 EPA 8260D 9-12-22 9-12-22 Hexachlorobutadiene ND 0.28 EPA 8260D 9-12-22 9-12-22 Naphthalene ND 0.28 EPA 8260D 9-12-22 9-12-22 1,2,3-Trichlorobenzene ND 0.055 EPA 8260D 9-12-22 9-12-22 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 118 75-130 Toluene-d8 101 78-128 4-Bromofluorobenzene 97 71-130 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0912S1 Dichlorodifluoromethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Chloromethane ND 0.0050 EPA 8260D 9-12-22 9-12-22 Vinyl Chloride ND 0.0010 EPA 8260D 9-12-22 9-12-22 Bromomethane ND 0.0076 EPA 8260D 9-12-22 9-12-22 Chloroethane ND 0.0050 EPA 8260D 9-12-22 9-12-22 Trichlorofluoromethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,1-Dichloroethene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Acetone ND 0.010 EPA 8260D 9-12-22 9-12-22 Iodomethane ND 0.0095 EPA 8260D 9-12-22 9-12-22 Carbon Disulfide ND 0.0010 EPA 8260D 9-12-22 9-12-22 Methylene Chloride ND 0.0050 EPA 8260D 9-12-22 9-12-22 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Methyl t-Butyl Ether ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,1-Dichloroethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Vinyl Acetate ND 0.0050 EPA 8260D 9-12-22 9-12-22 2,2-Dichloropropane ND 0.0010 EPA 8260D 9-12-22 9-12-22 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260D 9-12-22 9-12-22 2-Butanone ND 0.0050 EPA 8260D 9-12-22 9-12-22 Bromochloromethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Chloroform ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,1,1-Trichloroethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Carbon Tetrachloride ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,1-Dichloropropene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Benzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,2-Dichloroethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Trichloroethene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,2-Dichloropropane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Dibromomethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Bromodichloromethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 2-Chloroethyl Vinyl Ether ND 0.011 EPA 8260D 9-12-22 9-12-22 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Methyl Isobutyl Ketone ND 0.0050 EPA 8260D 9-12-22 9-12-22 Toluene ND 0.0050 EPA 8260D 9-12-22 9-12-22 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260D 9-12-22 9-12-22 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0912S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Tetrachloroethene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,3-Dichloropropane ND 0.0010 EPA 8260D 9-12-22 9-12-22 2-Hexanone ND 0.0050 EPA 8260D 9-12-22 9-12-22 Dibromochloromethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,2-Dibromoethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Chlorobenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 Ethylbenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 m,p-Xylene ND 0.0020 EPA 8260D 9-12-22 9-12-22 o-Xylene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Styrene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Bromoform ND 0.0050 EPA 8260D 9-12-22 9-12-22 Isopropylbenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Bromobenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,2,3-Trichloropropane ND 0.0010 EPA 8260D 9-12-22 9-12-22 n-Propylbenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 2-Chlorotoluene ND 0.0010 EPA 8260D 9-12-22 9-12-22 4-Chlorotoluene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 tert-Butylbenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 sec-Butylbenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,3-Dichlorobenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 p-Isopropyltoluene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,4-Dichlorobenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,2-Dichlorobenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 n-Butylbenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260D 9-12-22 9-12-22 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Hexachlorobutadiene ND 0.0050 EPA 8260D 9-12-22 9-12-22 Naphthalene ND 0.0050 EPA 8260D 9-12-22 9-12-22 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260D 9-12-22 9-12-22 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 119 75-130 Toluene-d8 109 78-128 4-Bromofluorobenzene 100 71-130 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0912S1 SB SBD SB SBD SB SBD Dichlorodifluoromethane 0.0475 0.0484 0.0500 0.0500 95 97 30-160 2 26 Chloromethane 0.0478 0.0490 0.0500 0.0500 96 98 59-131 2 26 Vinyl Chloride 0.0530 0.0531 0.0500 0.0500 106 106 68-136 0 23 Bromomethane 0.0328 0.0371 0.0500 0.0500 66 74 48-155 12 32 Chloroethane 0.0826 0.0849 0.0500 0.0500 165 170 67-141 3 16 I,I Trichlorofluoromethane 0.0497 0.0514 0.0500 0.0500 99 103 76-127 3 19 1,1-Dichloroethene 0.0519 0.0555 0.0500 0.0500 104 111 75-129 7 19 Acetone 0.0448 0.0570 0.0500 0.0500 90 114 49-158 24 37 Iodomethane 0.0264 0.0252 0.0500 0.0500 53 50 37-140 5 27 Carbon Disulfide 0.0445 0.0447 0.0500 0.0500 89 89 41-143 0 19 Methylene Chloride 0.0496 0.0503 0.0500 0.0500 99 101 60-124 1 18 (trans) 1,2-Dichloroethene 0.0522 0.0537 0.0500 0.0500 104 107 79-133 3 15 Methyl t-Butyl Ether 0.0478 0.0510 0.0500 0.0500 96 102 73-125 6 17 1,1-Dichloroethane 0.0527 0.0545 0.0500 0.0500 105 109 79-125 3 17 Vinyl Acetate 0.0491 0.0542 0.0500 0.0500 98 108 51-145 10 41 2,2-Dichloropropane 0.0509 0.0537 0.0500 0.0500 102 107 79-126 5 18 (cis) 1,2-Dichloroethene 0.0515 0.0533 0.0500 0.0500 103 107 75-131 3 15 2-Butanone 0.0457 0.0551 0.0500 0.0500 91 110 54-145 19 32 Bromochloromethane 0.0514 0.0529 0.0500 0.0500 103 106 80-126 3 15 Chloroform 0.0499 0.0508 0.0500 0.0500 100 102 80-123 2 15 1,1,1-Trichloroethane 0.0489 0.0510 0.0500 0.0500 98 102 78-124 4 21 Carbon Tetrachloride 0.0478 0.0510 0.0500 0.0500 96 102 74-127 6 18 1,1-Dichloropropene 0.0511 0.0543 0.0500 0.0500 102 109 80-123 6 15 Benzene 0.0477 0.0502 0.0500 0.0500 95 100 80-122 5 18 1,2-Dichloroethane 0.0478 0.0506 0.0500 0.0500 96 101 75-124 6 15 Trichloroethene 0.0479 0.0502 0.0500 0.0500 96 100 80-129 5 18 1,2-Dichloropropane 0.0511 0.0519 0.0500 0.0500 102 104 80-123 2 15 Dibromomethane 0.0470 0.0487 0.0500 0.0500 94 97 80-123 4 15 Bromodichloromethane 0.0504 0.0517 0.0500 0.0500 101 103 80-129 3 15 (cis) 1,3-Dichloropropene 0.0505 0.0516 0.0500 0.0500 101 103 80-130 2 15 Methyl Isobutyl Ketone 0.0470 0.0554 0.0500 0.0500 94 111 63-137 16 27 Toluene 0.0480 0.0501 0.0500 0.0500 96 100 80-120 4 18 (trans) 1,3-Dichloropropene 0.0505 0.0525 0.0500 0.0500 101 105 80-124 4 15 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0912S1 SB SBD SB SBD SB SBD 1,1,2-Trichloroethane 0.0467 0.0479 0.0500 0.0500 93 96 80-120 3 15 Tetrachloroethene 0.0484 0.0513 0.0500 0.0500 97 103 77-126 6 15 1,3-Dichloropropane 0.0488 0.0510 0.0500 0.0500 98 102 77-123 4 15 2-Hexanone 0.0450 0.0542 0.0500 0.0500 90 108 53-137 19 29 Dibromochloromethane 0.0508 0.0517 0.0500 0.0500 102 103 80-128 2 16 1,2-Dibromoethane 0.0504 0.0546 0.0500 0.0500 101 109 80-122 8 20 Chlorobenzene 0.0483 0.0495 0.0500 0.0500 97 99 80-120 2 18 1,1,1,2-Tetrachloroethane 0.0499 0.0516 0.0500 0.0500 100 103 80-120 3 15 Ethylbenzene 0.0480 0.0499 0.0500 0.0500 96 100 80-120 4 15 m,p-Xylene 0.094 0.098 0.100 0.100 94 98 80-120 4 15 o-Xylene 0.0475 0.0488 0.0500 0.0500 95 98 80-120 3 15 Styrene 0.0491 0.0504 0.0500 0.0500 98 101 80-122 3 15 Bromoform 0.0480 0.0518 0.0500 0.0500 96 104 78-126 8 15 Isopropylbenzene 0.0483 0.0506 0.0500 0.0500 97 101 80-125 5 15 Bromobenzene 0.0499 0.0513 0.0500 0.0500 100 103 79-124 3 15 1,1,2,2-Tetrachloroethane 0.0506 0.0549 0.0500 0.0500 101 110 75-122 8 17 1,2,3-Trichloropropane 0.0492 0.0540 0.0500 0.0500 98 108 72-125 9 20 n-Propylbenzene 0.0501 0.0511 0.0500 0.0500 100 102 77-126 2 16 2-Chlorotoluene 0.0494 0.0509 0.0500 0.0500 99 102 75-128 3 15 4-Chlorotoluene 0.0515 0.0523 0.0500 0.0500 103 105 78-127 2 16 1,3,5-Trimethylbenzene 0.0500 0.0512 0.0500 0.0500 100 102 77-128 2 15 tert-Butylbenzene 0.0489 0.0500 0.0500 0.0500 98 100 73-130 2 20 1,2,4-Trimethylbenzene 0.0485 0.0495 0.0500 0.0500 97 99 77-125 2 16 sec-Butylbenzene 0.0500 0.0504 0.0500 0.0500 100 101 75-130 1 17 1,3-Dichlorobenzene 0.0497 0.0504 0.0500 0.0500 99 101 78-123 1 17 p-Isopropyltoluene 0.0501 0.0508 0.0500 0.0500 100 102 75-130 1 18 1,4-Dichlorobenzene 0.0491 0.0499 0.0500 0.0500 98 100 77-121 2 17 1,2-Dichlorobenzene 0.0500 0.0507 0.0500 0.0500 100 101 80-120 1 15 n-Butylbenzene 0.0515 0.0531 0.0500 0.0500 103 106 76-131 3 20 1,2-Dibromo-3-chloropropane 0.0455 0.0532 0.0500 0.0500 91 106 61-137 16 28 1,2,4-Trichlorobenzene 0.0490 0.0526 0.0500 0.0500 98 105 77-127 7 17 Hexachlorobutadiene 0.0489 0.0518 0.0500 0.0500 98 104 77-125 6 22 Naphthalene 0.0466 0.0526 0.0500 0.0500 93 105 68-129 12 19 1,2,3-Trichlorobenzene 0.0482 0.0518 0.0500 0.0500 96 104 77-124 7 19 Surrogate: Dibromofluoromethane 113 114 75-130 Toluene-d8 107 107 78-128 4-Bromofluorobenzene 98 97 71-130 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC TOTAL METALS EPA 6010D/7471B Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-SFS:10 Laboratory ID: 09-083-02 Arsenic ND 12 EPA 6010D 9-12-22 9-12-22 Cadmium ND 0.62 EPA 6010D 9-12-22 9-12-22 Chromium 16 0.62 EPA 6010D 9-12-22 9-12-22 Lead ND 6.2 EPA 6010D 9-12-22 9-12-22 Mercury ND 0.31 EPA 7471B 9-12-22 9-12-22 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC TOTAL METALS EPA 6010D/7471B QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0912SM2 Arsenic ND 10 EPA 6010D 9-12-22 9-12-22 Cadmium ND 0.50 EPA 6010D 9-12-22 9-12-22 Chromium ND 0.50 EPA 6010D 9-12-22 9-12-22 Lead ND 5.0 EPA 6010D 9-12-22 9-12-22 Laboratory ID: MB0912S1 Mercury ND 0.25 EPA 7471B 9-12-22 9-12-22 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 09-083-02 ORIG DUP Arsenic ND ND NA NA NA NA NA 20 Cadmium ND ND NA NA NA NA NA 20 Chromium 12.8 15.5 NA NA NA NA 19 20 Lead ND ND NA NA NA NA NA 20 Laboratory ID: 09-083-02 Mercury ND ND NA NA NA NA NA 20 MATRIX SPIKES Laboratory ID: 09-083-02 MS MSD MS MSD MS MSD Arsenic 92.7 93.3 100 100 ND 93 93 75-125 1 20 Cadmium 45.2 45.4 50.0 50.0 ND 90 91 75-125 0 20 Chromium 105 103 100 100 12.8 93 90 75-125 2 20 Lead 225 228 250 250 ND 90 91 75-125 1 20 Laboratory ID: 09-083-02 Mercury 0.517 0.505 0.500 0.500 0.0206 99 97 80-120 2 20 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 12, 2022 Samples Submitted: September 9, 2022 Laboratory Reference: 2209-083 Project: SRTC % MOISTURE Date Client ID Lab ID % Moisture Analyzed A1-NW:1.5 09-083-01 10 9-9-22 A1-SFS:10 09-083-02 19 9-9-22 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1 - Sample extract treated with a sulfuric acid/silica gel cleanup procedure. X2 - Sample extract treated with a silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Y1 - Negative effects of the matrix from this sample on the instrument caused values for this analyte in the bracketing continuing calibration verification standard (CCVs) to be outside of 20% acceptance criteria. Because of this, quantitation limits and sample concentrations should be considered estimates. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 September 19, 2022 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 109693 Laboratory Reference No. 2209-106 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on September 14, 2022. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 19, 2022 Samples Submitted: September 14, 2022 Laboratory Reference: 2209-106 Project: 109693 Case Narrative Samples were collected on September 12, 2022 and received by the laboratory on September 14, 2022. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 19, 2022 Samples Submitted: September 14, 2022 Laboratory Reference: 2209-106 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-WFS:10 Laboratory ID: 09-106-01 Gasoline Range Organics 13 5.6 NWTPH-Gx 9-14-22 9-14-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 82 69-130 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 19, 2022 Samples Submitted: September 14, 2022 Laboratory Reference: 2209-106 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0914S1 Gasoline ND 5.0 NWTPH-Gx 9-14-22 9-14-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 82 69-130 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 09-110-01 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 86 84 69-130 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 19, 2022 Samples Submitted: September 14, 2022 Laboratory Reference: 2209-106 Project: 109693 VOLATILE ORGANICS EPA 8260D Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-WFS:10 Laboratory ID: 09-106-01 Benzene ND 0.00077 EPA 8260D 9-15-22 9-15-22 Toluene ND 0.0039 EPA 8260D 9-15-22 9-15-22 Ethylbenzene ND 0.00077 EPA 8260D 9-15-22 9-15-22 m,p-Xylene 0.0065 0.0015 EPA 8260D 9-15-22 9-15-22 o-Xylene 0.011 0.00077 EPA 8260D 9-15-22 9-15-22 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 83 75-130 Toluene-d8 97 78-128 4-Bromofluorobenzene 96 71-130 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 19, 2022 Samples Submitted: September 14, 2022 Laboratory Reference: 2209-106 Project: 109693 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0915S1 Benzene ND 0.0010 EPA 8260D 9-15-22 9-15-22 Toluene ND 0.0050 EPA 8260D 9-15-22 9-15-22 Ethylbenzene ND 0.0010 EPA 8260D 9-15-22 9-15-22 m,p-Xylene ND 0.0020 EPA 8260D 9-15-22 9-15-22 o-Xylene ND 0.0010 EPA 8260D 9-15-22 9-15-22 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 83 75-130 Toluene-d8 101 78-128 4-Bromofluorobenzene 107 71-130 Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB0915S1 SB SBD SB SBD SB SBD Benzene 0.0425 0.0451 0.0500 0.0500 85 90 80-122 6 18 Toluene 0.0492 0.0513 0.0500 0.0500 98 103 80-120 4 18 Ethylbenzene 0.0479 0.0507 0.0500 0.0500 96 101 80-120 6 15 m,p-Xylene 0.0941 0.0993 0.100 0.100 94 99 80-120 5 15 o-Xylene 0.0481 0.0502 0.0500 0.0500 96 100 80-120 4 15 Surrogate: Dibromofluoromethane 84 86 75-130 Toluene-d8 98 99 78-128 4-Bromofluorobenzene 104 104 71-130 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 19, 2022 Samples Submitted: September 14, 2022 Laboratory Reference: 2209-106 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-WFS:10 Laboratory ID: 09-106-01 Diesel Range Organics ND 460 NWTPH-Dx 9-15-22 9-16-22 U1 Lube Oil 4500 300 NWTPH-Dx 9-15-22 9-16-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 84 50-150 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 19, 2022 Samples Submitted: September 14, 2022 Laboratory Reference: 2209-106 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0915S1 Diesel Range Organics ND 25 NWTPH-Dx 9-15-22 9-15-22 Lube Oil Range Organics ND 50 NWTPH-Dx 9-15-22 9-15-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 82 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB0915S1 ORIG DUP Diesel Fuel #2 86.6 81.6 NA NA NA NA 6 NA Surrogate: o-Terphenyl 88 83 50-150 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 19, 2022 Samples Submitted: September 14, 2022 Laboratory Reference: 2209-106 Project: 109693 % MOISTURE Date Client ID Lab ID % Moisture Analyzed A1-WFS:10 09-106-01 16 9-15-22 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1 - Sample extract treated with a sulfuric acid/silica gel cleanup procedure. X2 - Sample extract treated with a silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Y1 - Negative effects of the matrix from this sample on the instrument caused values for this analyte in the bracketing continuing calibration verification standard (CCVs) to be outside of 20% acceptance criteria. Because of this, quantitation limits and sample concentrations should be considered estimates. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 September 22, 2022 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 109693 Laboratory Reference No. 2209-183 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on September 21, 2022. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 22, 2022 Samples Submitted: September 21, 2022 Laboratory Reference: 2209-183 Project: 109693 Case Narrative Samples were collected on September 20, 2022 and received by the laboratory on September 21, 2022. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 22, 2022 Samples Submitted: September 21, 2022 Laboratory Reference: 2209-183 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A5-SW:5 Laboratory ID: 09-183-01 Diesel Range Organics ND 27 NWTPH-Dx 9-21-22 9-21-22 Lube Oil Range Organics ND 54 NWTPH-Dx 9-21-22 9-21-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 93 50-150 Client ID: A5-SWD:5 Laboratory ID: 09-183-02 Diesel Range Organics ND 30 NWTPH-Dx 9-21-22 9-21-22 Lube Oil 110 60 NWTPH-Dx 9-21-22 9-21-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 85 50-150 Client ID: A5-NW:5 Laboratory ID: 09-183-03 Diesel Range Organics ND 27 NWTPH-Dx 9-21-22 9-21-22 Lube Oil Range Organics ND 54 NWTPH-Dx 9-21-22 9-21-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 89 50-150 Client ID: A5-EW:5 Laboratory ID: 09-183-04 Diesel Range Organics ND 30 NWTPH-Dx 9-21-22 9-21-22 Lube Oil 72 59 NWTPH-Dx 9-21-22 9-21-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 86 50-150 Client ID: A5-WW:5.5 Laboratory ID: 09-183-05 Diesel Range Organics ND 34 NWTPH-Dx 9-21-22 9-21-22 Lube Oil Range Organics ND 68 NWTPH-Dx 9-21-22 9-21-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 77 50-150 Client ID: A5-Bot:8 Laboratory ID: 09-183-06 Diesel Range Organics ND 38 NWTPH-Dx 9-21-22 9-21-22 Lube Oil Range Organics ND 75 NWTPH-Dx 9-21-22 9-21-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 78 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 22, 2022 Samples Submitted: September 21, 2022 Laboratory Reference: 2209-183 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0921S1 Diesel Range Organics ND 25 NWTPH-Dx 9-21-22 9-21-22 Lube Oil Range Organics ND 50 NWTPH-Dx 9-21-22 9-21-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB0921S1 ORIG DUP Diesel Fuel #2 98.8 91.2 NA NA NA NA 8 NA Surrogate: o-Terphenyl 102 97 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: September 22, 2022 Samples Submitted: September 21, 2022 Laboratory Reference: 2209-183 Project: 109693 % MOISTURE Date Client ID Lab ID % Moisture Analyzed A5-SW:5 09-183-01 7 9-21-22 A5-SWD:5 09-183-02 16 9-21-22 A5-NW:5 09-183-03 8 9-21-22 A5-EW:5 09-183-04 16 9-21-22 A5-WW:5.5 09-183-05 26 9-21-22 A5-Bot:8 09-183-06 33 9-21-22 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1 - Sample extract treated with a sulfuric acid/silica gel cleanup procedure. X2 - Sample extract treated with a silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Y1 - Negative effects of the matrix from this sample on the instrument caused values for this analyte in the bracketing continuing calibration verification standard (CCVs) to be outside of 20% acceptance criteria. Because of this, quantitation limits and sample concentrations should be considered estimates. 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)ODJV '83/,&$7( /DERUDWRU\,' 25,* '83 'LHVHO5DQJH1' 1' 1$ 1$ 1$ 1$ 1$ 1$ /XEH2LO5DQJH1' 1' 1$ 1$ 1$ 1$ 1$ 1$ Surrogate: o-Terphenyl 74 69 50-150 2Q6LWH(QYLURQPHQWDO,QF1(WK6WUHHW5HGPRQG:$ 7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW2FWREHU 6DPSOHV6XEPLWWHG6HSWHPEHU /DERUDWRU\5HIHUHQFH 3URMHFW ',(6(/$1'+($9<2,/5$1*(25*$1,&6 1:73+'[ 0DWUL[ 6RLO 8QLWV PJ.JSSP 'DWH 'DWH $QDO\WH 5HVXOW 34/ 0HWKRG 3UHSDUHG $QDO\]HG )ODJV &OLHQW,' $$%ROW /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 66 50-150 &OLHQW,' $$: /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ 8 /XEH2LO 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 87 50-150 &OLHQW,' $$6 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 81 50-150 &OLHQW,' $%6 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 73 50-150 &OLHQW,' $&6 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 81 50-150 &OLHQW,' $ /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ 8 /XEH2LO 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 75 50-150 2Q6LWH(QYLURQPHQWDO,QF1(WK6WUHHW5HGPRQG:$ 7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW2FWREHU 6DPSOHV6XEPLWWHG6HSWHPEHU /DERUDWRU\5HIHUHQFH 3URMHFW ',(6(/$1'+($9<2,/5$1*(25*$1,&6 1:73+'[ 0DWUL[ 6RLO 8QLWV PJ.JSSP 'DWH 'DWH $QDO\WH 5HVXOW 34/ 0HWKRG 3UHSDUHG $QDO\]HG )ODJV &OLHQW,' $&%ROW /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 70 50-150 &OLHQW,' $'6 /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 78 50-150 &OLHQW,' $'%ROW /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV1' 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl 56 50-150 &OLHQW,' $ /DERUDWRU\,' 'LHVHO5DQJH2UJDQLFV 1:73+'[ /XEH2LO5DQJH2UJDQLFV1' 1:73+'[ Surrogate: Percent Recovery Control Limits o-Terphenyl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urrogate: Percent Recovery Control Limits o-Terphenyl 75 50-150 6RXUFH 3HUFHQW 5HFRYHU\ 53' $QDO\WH 5HVXOW 6SLNH/HYHO 5HVXOW 5HFRYHU\ /LPLWV 53' /LPLW )ODJV '83/,&$7( /DERUDWRU\,' 6%6 25,* '83 'LHVHO)XHO 1$ 1$ 1$ 1$ 1$ Surrogate: o-Terphenyl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DQGWKHUHIRUHWKHUHSRUWHGUHVXOWVKRXOGEHFRQVLGHUHGDQHVWLPDWH7KHRYHUDOOSHUIRUPDQFHRIWKHFDOLEUDWLRQYHULILFDWLRQVWDQGDUGPHWWKHDFFHSWDQFHFULWHULDRIWKHPHWKRG<1HJDWLYHHIIHFWVRIWKHPDWUL[IURPWKLVVDPSOHRQWKHLQVWUXPHQWFDXVHGYDOXHVIRUWKLVDQDO\WHLQWKHEUDFNHWLQJFRQWLQXLQJFDOLEUDWLRQYHULILFDWLRQVWDQGDUG&&9VWREHRXWVLGHRIDFFHSWDQFHFULWHULD%HFDXVHRIWKLVTXDQWLWDWLRQOLPLWVDQGVDPSOHFRQFHQWUDWLRQVVKRXOGEHFRQVLGHUHGHVWLPDWHV= 1'1RW'HWHFWHGDW34/ 34/3UDFWLFDO4XDQWLWDWLRQ/LPLW 53'5HODWLYH3HUFHQW'LIIHUHQFH OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 October 6, 2022 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 109693 Laboratory Reference No. 2209-332 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on September 30, 2022. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 Case Narrative Samples were collected on September 30, 2022 and received by the laboratory on September 30, 2022. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: Trip Blank Laboratory ID: 09-332-01 Gasoline ND 100 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 97 65-122 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1005W1 Gasoline ND 100 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 93 65-122 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 10-012-02 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 92 99 65-122 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-A2-SW:9 Laboratory ID: 09-332-02 Gasoline ND 7.7 NWTPH-Gx 9-30-22 9-30-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 104 69-130 Client ID: A1-A2-NW:9 Laboratory ID: 09-332-03 Gasoline ND 53 NWTPH-Gx 9-30-22 10-3-22 U1 Surrogate: Percent Recovery Control Limits Fluorobenzene 99 69-130 Client ID: A1-A2:Stock Laboratory ID: 09-332-04 Gasoline ND 48 NWTPH-Gx 9-30-22 10-3-22 U1 Surrogate: Percent Recovery Control Limits Fluorobenzene 103 69-130 Client ID: A1-A2-Bolt:12 Laboratory ID: 09-332-05 Gasoline ND 8.8 NWTPH-Gx 9-30-22 10-3-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 100 69-130 Client ID: A1-C2-E:9 Laboratory ID: 09-332-06 Gasoline ND 11 NWTPH-Gx 9-30-22 9-30-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 127 69-130 Client ID: A1-D1-N:9 Laboratory ID: 09-332-07 Gasoline ND 6.8 NWTPH-Gx 9-30-22 9-30-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 97 69-130 Client ID: A1-C2-Bolt9:12 Laboratory ID: 09-332-08 Gasoline ND 12 NWTPH-Gx 9-30-22 9-30-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 116 69-130 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-102:9 Laboratory ID: 09-332-09 Gasoline ND 77 NWTPH-Gx 9-30-22 10-3-22 U1 Surrogate: Percent Recovery Control Limits Fluorobenzene 99 69-130 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0930S2 Gasoline ND 5.0 NWTPH-Gx 9-30-22 9-30-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 104 69-130 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 09-332-03 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 99 88 69-130 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-A2-SW:9 Laboratory ID: 09-332-02 Diesel Range Organics ND 34 NWTPH-Dx 10-3-22 10-3-22 Lube Oil Range Organics ND 68 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 61 50-150 Client ID: A1-A2-NW:9 Laboratory ID: 09-332-03 Diesel Range Organics 2700 700 NWTPH-Dx 10-3-22 10-3-22 N Lube Oil 11000 1400 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl --- 50-150 S Client ID: A1-A2:Stock Laboratory ID: 09-332-04 Diesel Range Organics 1100 160 NWTPH-Dx 10-3-22 10-3-22 N Lube Oil 5800 320 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 85 50-150 Client ID: A1-A2-Bolt:12 Laboratory ID: 09-332-05 Diesel Range Organics ND 38 NWTPH-Dx 10-3-22 10-3-22 Lube Oil Range Organics ND 76 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 77 50-150 Client ID: A1-C2-E:9 Laboratory ID: 09-332-06 Diesel Range Organics ND 41 NWTPH-Dx 10-3-22 10-3-22 Lube Oil Range Organics ND 82 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 70 50-150 Client ID: A1-D1-N:9 Laboratory ID: 09-332-07 Diesel Range Organics ND 32 NWTPH-Dx 10-3-22 10-3-22 Lube Oil Range Organics ND 64 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 80 50-150 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-C2-Bolt9:12 Laboratory ID: 09-332-08 Diesel Range Organics ND 41 NWTPH-Dx 10-3-22 10-3-22 Lube Oil Range Organics ND 83 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 80 50-150 Client ID: A1-102:9 Laboratory ID: 09-332-09 Diesel Range Organics 3400 700 NWTPH-Dx 10-3-22 10-3-22 N Lube Oil 14000 1400 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl --- 50-150 S 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1003S1 Diesel Range Organics ND 25 NWTPH-Dx 10-3-22 10-3-22 Lube Oil Range Organics ND 50 NWTPH-Dx 10-3-22 10-3-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 90 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB1003S1 ORIG DUP Diesel Fuel #2 85.0 85.9 NA NA NA NA 1 NA Surrogate: o-Terphenyl 98 95 50-150 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 6, 2022 Samples Submitted: September 30, 2022 Laboratory Reference: 2209-332 Project: 109693 % MOISTURE Date Client ID Lab ID % Moisture Analyzed A1-A2-SW:9 09-332-02 27 9-30-22 A1-A2-NW:9 09-332-03 10 9-30-22 A1-A2:Stock 09-332-04 21 9-30-22 A1-A2-Bolt:12 09-332-05 34 9-30-22 A1-C2-E:9 09-332-06 39 9-30-22 A1-D1-N:9 09-332-07 22 9-30-22 A1-C2-Bolt9:12 09-332-08 40 9-30-22 A1-102:9 09-332-09 11 9-30-22 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1 - Sample extract treated with a sulfuric acid/silica gel cleanup procedure. X2 - Sample extract treated with a silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Y1 - Negative effects of the matrix from this sample on the instrument caused values for this analyte in the bracketing continuing calibration verification standard (CCVs) to be outside of 20% acceptance criteria. Because of this, quantitation limits and sample concentrations should be considered estimates. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 October 7, 2022 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 109693 Laboratory Reference No. 2210-025 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on October 4, 2022. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 7, 2022 Samples Submitted: October 4, 2022 Laboratory Reference: 2210-025 Project: 109693 Case Narrative Samples were collected on October 4, 2022 and received by the laboratory on October 4, 2022. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 7, 2022 Samples Submitted: October 4, 2022 Laboratory Reference: 2210-025 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: Trip Blank Laboratory ID: 10-025-01 Gasoline ND 100 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 97 65-122 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 7, 2022 Samples Submitted: October 4, 2022 Laboratory Reference: 2210-025 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1005W1 Gasoline ND 100 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 93 65-122 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 10-012-02 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 92 99 65-122 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 7, 2022 Samples Submitted: October 4, 2022 Laboratory Reference: 2210-025 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-C3-E:8 Laboratory ID: 10-025-02 Gasoline ND 11 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 128 69-130 Client ID: A1-C3-N:8 Laboratory ID: 10-025-03 Gasoline ND 8.1 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 114 69-130 Client ID: A1-B3-B017:11 Laboratory ID: 10-025-04 Gasoline ND 10 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 130 69-130 Client ID: A1-A3-B017:11 Laboratory ID: 10-025-05 Gasoline ND 12 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 115 69-130 Client ID: A1-A3-W:8 Laboratory ID: 10-025-06 Gasoline ND 8.1 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 108 69-130 Client ID: A1-103:8 Laboratory ID: 10-025-07 Gasoline ND 7.5 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 110 69-130 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 7, 2022 Samples Submitted: October 4, 2022 Laboratory Reference: 2210-025 Project: 109693 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1005S1 Gasoline ND 5.0 NWTPH-Gx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 102 69-130 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 10-025-07 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 110 104 69-130 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 7, 2022 Samples Submitted: October 4, 2022 Laboratory Reference: 2210-025 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-C3-E:8 Laboratory ID: 10-025-02 Diesel Range Organics ND 41 NWTPH-Dx 10-5-22 10-5-22 Lube Oil Range Organics ND 82 NWTPH-Dx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 67 50-150 Client ID: A1-C3-N:8 Laboratory ID: 10-025-03 Diesel Range Organics ND 34 NWTPH-Dx 10-5-22 10-5-22 Lube Oil Range Organics 76 67 NWTPH-Dx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 81 50-150 Client ID: A1-B3-B017:11 Laboratory ID: 10-025-04 Diesel Range Organics ND 41 NWTPH-Dx 10-5-22 10-5-22 Lube Oil Range Organics ND 82 NWTPH-Dx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 53 50-150 Client ID: A1-A3-B017:11 Laboratory ID: 10-025-05 Diesel Range Organics 58 30 NWTPH-Dx 10-5-22 10-5-22 N Lube Oil Range Organics 660 59 NWTPH-Dx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 68 50-150 Client ID: A1-A3-W:8 Laboratory ID: 10-025-06 Diesel Range Organics ND 33 NWTPH-Dx 10-5-22 10-5-22 Lube Oil Range Organics ND 66 NWTPH-Dx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 79 50-150 Client ID: A1-103:8 Laboratory ID: 10-025-07 Diesel Range Organics ND 32 NWTPH-Dx 10-5-22 10-5-22 Lube Oil Range Organics ND 64 NWTPH-Dx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 76 50-150 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 7, 2022 Samples Submitted: October 4, 2022 Laboratory Reference: 2210-025 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1005S1 Diesel Range Organics ND 25 NWTPH-Dx 10-5-22 10-5-22 Lube Oil Range Organics ND 50 NWTPH-Dx 10-5-22 10-5-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 94 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB1005S1 ORIG DUP Diesel Fuel #2 92.7 89.0 NA NA NA NA 4 NA Surrogate: o-Terphenyl 94 94 50-150 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 7, 2022 Samples Submitted: October 4, 2022 Laboratory Reference: 2210-025 Project: 109693 % MOISTURE Date Client ID Lab ID % Moisture Analyzed A1-C3-E:8 10-025-02 39 10-4-22 A1-C3-N:8 10-025-03 25 10-4-22 A1-B3-B017:11 10-025-04 39 10-4-22 A1-A3-B017:11 10-025-05 15 10-4-22 A1-A3-W:8 10-025-06 24 10-4-22 A1-103:8 10-025-07 22 10-4-22 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1 - Sample extract treated with a sulfuric acid/silica gel cleanup procedure. X2 - Sample extract treated with a silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Y1 - Negative effects of the matrix from this sample on the instrument caused values for this analyte in the bracketing continuing calibration verification standard (CCVs) to be outside of 20% acceptance criteria. Because of this, quantitation limits and sample concentrations should be considered estimates. 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DQGWKHUHIRUHWKHUHSRUWHGUHVXOWVKRXOGEHFRQVLGHUHGDQHVWLPDWH7KHRYHUDOOSHUIRUPDQFHRIWKHFDOLEUDWLRQYHULILFDWLRQVWDQGDUGPHWWKHDFFHSWDQFHFULWHULDRIWKHPHWKRG<1HJDWLYHHIIHFWVRIWKHPDWUL[IURPWKLVVDPSOHRQWKHLQVWUXPHQWFDXVHGYDOXHVIRUWKLVDQDO\WHLQWKHEUDFNHWLQJFRQWLQXLQJFDOLEUDWLRQYHULILFDWLRQVWDQGDUG&&9VWREHRXWVLGHRIDFFHSWDQFHFULWHULD%HFDXVHRIWKLVTXDQWLWDWLRQOLPLWVDQGVDPSOHFRQFHQWUDWLRQVVKRXOGEHFRQVLGHUHGHVWLPDWHV= 1'1RW'HWHFWHGDW34/ 34/3UDFWLFDO4XDQWLWDWLRQ/LPLW 53'5HODWLYH3HUFHQW'LIIHUHQFH OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 November 2, 2022 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 109693-002 Laboratory Reference No. 2211-004 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on November 1, 2022. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 2, 2022 Samples Submitted: November 1, 2022 Laboratory Reference: 2211-004 Project: 109693-002 Case Narrative Samples were collected on October 31, 2022 and received by the laboratory on November 1, 2022. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 2, 2022 Samples Submitted: November 1, 2022 Laboratory Reference: 2211-004 Project: 109693-002 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: HA-3:Ex-Bot Laboratory ID: 11-004-01 Gasoline ND 14 NWTPH-Gx 11-1-22 11-2-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 110 69-130 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 2, 2022 Samples Submitted: November 1, 2022 Laboratory Reference: 2211-004 Project: 109693-002 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1101S1 Gasoline ND 5.0 NWTPH-Gx 11-1-22 11-1-22 Surrogate: Percent Recovery Control Limits Fluorobenzene 89 69-130 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 11-003-02 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 109 108 69-130 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 2, 2022 Samples Submitted: November 1, 2022 Laboratory Reference: 2211-004 Project: 109693-002 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: HA-3:Ex-Bot Laboratory ID: 11-004-01 Diesel Range Organics 1900 330 NWTPH-Dx 11-1-22 11-2-22 Lube Oil 20000 660 NWTPH-Dx 11-1-22 11-2-22 Surrogate: Percent Recovery Control Limits o-Terphenyl --- 50-150 S 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 2, 2022 Samples Submitted: November 1, 2022 Laboratory Reference: 2211-004 Project: 109693-002 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1101S1 Diesel Range Organics ND 25 NWTPH-Dx 11-1-22 11-1-22 Lube Oil Range Organics ND 50 NWTPH-Dx 11-1-22 11-1-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 92 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB1101S1 ORIG DUP Diesel Fuel #2 89.5 76.4 NA NA NA NA 16 NA Surrogate: o-Terphenyl 102 91 50-150 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 2, 2022 Samples Submitted: November 1, 2022 Laboratory Reference: 2211-004 Project: 109693-002 % MOISTURE Date Client ID Lab ID % Moisture Analyzed HA-3:Ex-Bot 11-004-01 24 11-1-22 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1 - Sample extract treated with a sulfuric acid/silica gel cleanup procedure. X2 - Sample extract treated with a silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Y1 - Negative effects of the matrix from this sample on the instrument caused values for this analyte in the bracketing continuing calibration verification standard (CCVs) to be outside of 20% acceptance criteria. Because of this, quantitation limits and sample concentrations should be considered estimates. 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7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW1RYHPEHU 6DPSOHV6XEPLWWHG1RYHPEHU /DERUDWRU\5HIHUHQFH 3URMHFW *$62/,1(5$1*(25*$1,&6 1:73+*[ 0DWUL[ 6RLO 8QLWV PJNJSSP 'DWH 'DWH $QDO\WH 5HVXOW 34/ 0HWKRG 3UHSDUHG $QDO\]HG )ODJV &OLHQW,' $+% /DERUDWRU\,' *DVROLQH1' 1:73+*[ Surrogate: Percent Recovery Control Limits Fluorobenzene 105 69-130 &OLHQW,' $+& /DERUDWRU\,' *DVROLQH1' 1:73+*[ Surrogate: Percent Recovery Control Limits Fluorobenzene 106 69-130 &OLHQW,' $+% /DERUDWRU\,' *DVROLQH1' 1:73+*[ Surrogate: Percent Recovery Control Limits Fluorobenzene 98 69-130 2Q6LWH(QYLURQPHQWDO,QF1(WK6WUHHW5HGPRQG:$ 7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 'DWHRI5HSRUW1RYHPEHU 6DPSOHV6XEPLWWHG1RYHPEHU /DERUDWRU\5HIHUHQFH 3URMHFW *$62/,1(5$1*(25*$1,&6 1:73+*[ 48$/,7<&21752/ 0DWUL[ 6RLO 8QLWV PJNJSSP 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DQGWKHUHIRUHWKHUHSRUWHGUHVXOWVKRXOGEHFRQVLGHUHGDQHVWLPDWH7KHRYHUDOOSHUIRUPDQFHRIWKHFDOLEUDWLRQYHULILFDWLRQVWDQGDUGPHWWKHDFFHSWDQFHFULWHULDRIWKHPHWKRG<1HJDWLYHHIIHFWVRIWKHPDWUL[IURPWKLVVDPSOHRQWKHLQVWUXPHQWFDXVHGYDOXHVIRUWKLVDQDO\WHLQWKHEUDFNHWLQJFRQWLQXLQJFDOLEUDWLRQYHULILFDWLRQVWDQGDUG&&9VWREHRXWVLGHRIDFFHSWDQFHFULWHULD%HFDXVHRIWKLVTXDQWLWDWLRQOLPLWVDQGVDPSOHFRQFHQWUDWLRQVVKRXOGEHFRQVLGHUHGHVWLPDWHV= 1'1RW'HWHFWHGDW34/ 34/3UDFWLFDO4XDQWLWDWLRQ/LPLW 53'5HODWLYH3HUFHQW'LIIHUHQFH OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 x (425) 883-3881 November 9, 2022 Agnes Tirao Shannon & Wilson, Inc. 400 N 34th Street, Suite 100 Seattle, WA 98103 Re: Analytical Data for Project 109693 Laboratory Reference No. 2211-112 Dear Agnes: Enclosed are the analytical results and associated quality control data for samples submitted on November 8, 2022. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 9, 2022 Samples Submitted: November 8, 2022 Laboratory Reference: 2211-112 Project: 109693 Case Narrative Samples were collected on November 8, 2022 and received by the laboratory on November 8, 2022. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 9, 2022 Samples Submitted: November 8, 2022 Laboratory Reference: 2211-112 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: A1-A4-Bolt:12.5 Laboratory ID: 11-112-01 Diesel Range Organics ND 36 NWTPH-Dx 11-8-22 11-8-22 Lube Oil Range Organics ND 72 NWTPH-Dx 11-8-22 11-8-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 129 50-150 Client ID: A1-A4-W2:9 Laboratory ID: 11-112-02 Diesel Range Organics ND 35 NWTPH-Dx 11-8-22 11-9-22 Lube Oil Range Organics ND 71 NWTPH-Dx 11-8-22 11-9-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 63 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 9, 2022 Samples Submitted: November 8, 2022 Laboratory Reference: 2211-112 Project: 109693 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1108S2 Diesel Range Organics ND 25 NWTPH-Dx 11-8-22 11-8-22 Lube Oil Range Organics ND 50 NWTPH-Dx 11-8-22 11-8-22 Surrogate: Percent Recovery Control Limits o-Terphenyl 93 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 11-112-01 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 87 129 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: November 9, 2022 Samples Submitted: November 8, 2022 Laboratory Reference: 2211-112 Project: 109693 % MOISTURE Date Client ID Lab ID % Moisture Analyzed A1-A4-Bolt:12.5 11-112-01 31 11-8-22 A1-A4-W2:9 11-112-02 29 11-8-22 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1 - Sample extract treated with a sulfuric acid/silica gel cleanup procedure. X2 - Sample extract treated with a silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Y1 - Negative effects of the matrix from this sample on the instrument caused values for this analyte in the bracketing continuing calibration verification standard (CCVs) to be outside of 20% acceptance criteria. Because of this, quantitation limits and sample concentrations should be considered estimates. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference 2Q6LWH(QYLURQPHQWDO,QF1(WK6WUHHW5HGPRQG:$ 7KLVUHSRUWSHUWDLQVWRWKHVDPSOHVDQDO\]HGLQDFFRUGDQFHZLWKWKHFKDLQRIFXVWRG\ DQGLVLQWHQGHGRQO\IRUWKHXVHRIWKHLQGLYLGXDORUFRPSDQ\WRZKRPLWLVDGGUHVVHG 1(WK6WUHHW5HGPRQG:$x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RTN001-RTN004) Remedial Action Report 109693-003 February 8, 2024 '-iAPPENDIX D: DISPOSAL DOCUMENTATIONAppendix D: Disposal DocumentationAppendix D Disposal Documentation Export_RDI_1008433_2022-09-15 Export_RDI_1008435_2022-09-15 Export_RDI_1008437_2022-09-15 Export_RDI_1008440_2022-09-15 Export_RDI_1008445_2022-09-15 Export_RDI_1008447_2022-09-15 Export_RDI_1008447_2022-09-15 Export_RDI_1008453_2022-09-15 Export_RDI_1008465_2022-09-15 Export_RDI_1008468_2022-09-15 Export_RDI_1008470_2022-09-15 Export_RDI_1008472_2022-09-15 Export_RDI_1008476_2022-09-15 Export_RDI_1008490_2022-09-15 REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101020901 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 8:06 am 11/21/22 8:13 am 194 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 82,740 42,540 40,200 20.10 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 20.10 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101021101 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 8:15 am 11/21/22 8:26 am 193 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 81,220 41,900 39,320 19.66 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 19.66 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101021201 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 8:30 am 11/21/22 8:39 am 195 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 81,960 42,020 39,940 19.97 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 19.97 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101021501 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 8:49 am 11/21/22 9:03 am 199 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 87,240 41,960 45,280 22.64 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 22.64 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101021601 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 8:55 am 11/21/22 9:06 am 179 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 87,320 41,440 45,880 22.94 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 22.94 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101021701 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 9:00 am 11/21/22 9:13 am 186 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 92,440 41,740 50,700 25.35 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 25.35 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101021801 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 9:22 am 11/21/22 9:32 am 183 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 89,740 41,740 48,000 24.00 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 24.00 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101021901 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 9:43 am 11/21/22 9:51 am 180 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 77,140 43,280 33,860 16.93 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 16.93 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101022101 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 9:53 am 11/21/22 10:07 am 188 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 99,000 41,680 57,320 28.66 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 28.66 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101022001 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 10:03 am 11/21/22 10:03 am 194 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 99,220 42,540 56,680 28.34 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 28.34 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101022201 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 10:15 am 11/21/22 10:15 am 193 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 93,620 41,900 51,720 25.86 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 25.86 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101022601 IN - Nikole A. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 10:30 am 11/21/22 10:49 am 157 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 102,260 41,960 60,300 30.15 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 30.15 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101022501 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 10:38 am 11/21/22 10:38 am 195 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 92,040 42,020 50,020 25.01 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 25.01 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101022701 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 10:55 am 11/21/22 10:55 am 179 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 85,820 41,440 44,380 22.19 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 22.19 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101022801 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 10:58 am 11/21/22 10:58 am 199 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 97,720 41,960 55,760 27.88 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 27.88 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101023101 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 11:25 am 11/21/22 11:25 am 186 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 85,940 41,740 44,200 22.10 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 22.10 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101023301 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 11:33 am 11/21/22 11:33 am 183 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 87,760 41,740 46,020 23.01 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 23.01 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101023501 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 11:50 am 11/21/22 11:50 am 180 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 87,260 43,280 43,980 21.99 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 21.99 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101023701 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 12:05 pm 11/21/22 12:05 pm 188 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 92,220 41,680 50,540 25.27 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 25.27 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101023901 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 12:11 pm 11/21/22 12:11 pm 194 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 97,100 42,540 54,560 27.28 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 27.28 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101024001 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 12:17 pm 11/21/22 12:17 pm 193 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 98,120 41,900 56,220 28.11 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 28.11 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101024201 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 12:41 pm 11/21/22 12:41 pm 195 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 98,900 42,020 56,880 28.44 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 28.44 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101024301 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 12:51 pm 11/21/22 12:51 pm 179 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 94,600 41,440 53,160 26.58 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 26.58 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101024401 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 1:17 pm 11/21/22 1:17 pm 199 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 94,320 41,960 52,360 26.18 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 26.18 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101024501 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 1:19 pm 11/21/22 1:19 pm 186 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 104,740 41,740 63,000 31.50 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 31.50 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101024601 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 1:20 pm 11/21/22 1:20 pm 157 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 99,580 27,400 72,180 36.09 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 36.09 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101024701 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 1:27 pm 11/21/22 1:27 pm 194 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 89,860 42,540 47,320 23.66 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 23.66 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101024801 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 1:43 pm 11/21/22 1:43 pm 193 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 79,000 41,900 37,100 18.55 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 18.55 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101025101 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 1:55 pm 11/21/22 1:55 pm 195 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 89,880 42,020 47,860 23.93 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 23.93 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101025201 Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 2:03 pm 11/21/22 2:03 pm STEVE 179 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 88,020 41,440 46,580 23.29 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 23.29 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101025401 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 2:31 pm 11/21/22 2:31 pm 199 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 91,700 41,960 49,740 24.87 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 24.87 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101025501 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 2:38 pm 11/21/22 2:38 pm 186 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 82,540 41,740 40,800 20.40 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 20.40 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101025601 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/21/22 2:42 pm 11/21/22 2:42 pm 194 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 83,540 42,540 41,000 20.50 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 20.50 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101026101 LARRY C. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 7:45 am 11/22/22 7:55 am 193 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 84,160 41,980 42,180 21.09 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 21.09 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101026401 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 8:01 am 11/22/22 8:17 am OMA 199 Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 83,680 41,940 41,740 20.87 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 20.87 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101026601 IN - LARRY C. OUT - Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 8:06 am 11/22/22 8:21 am 179 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 80,100 41,580 38,520 19.26 INBOUND INVOICE Scale In Scale Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 19.26 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101027001 LARRY C. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 9:02 am 11/22/22 9:02 am 193 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 86,720 41,980 44,740 22.37 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 22.37 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101027201 LARRY C. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 9:18 am 11/22/22 9:18 am 199 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 98,980 41,940 57,040 28.52 INBOUND INVOICE Scale In Manual Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 28.52 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101027301 LARRY C. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 9:31 am 11/22/22 9:31 am 179 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 92,800 41,580 51,220 25.61 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 25.61 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101027501 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 10:07 am 11/22/22 10:07 am 193 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 94,140 41,980 52,160 26.08 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 26.08 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101027701 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 10:32 am 11/22/22 10:32 am 199 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 101,060 41,940 59,120 29.56 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 29.56 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101027901 Stephanie A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 11:06 am 11/22/22 11:06 am 179 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 96,680 41,580 55,100 27.55 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 27.55 CHANGE: CHECK : REGIONAL DISPOSAL INTERMODAL 425-977-4127 3rd and lander Seattle, WA REPRINT 101028001 Nikole A. 016428 - Engineering/Remediation Resources Group 4585 Pacheco Blvd Ste 200 Martinez, CA 94553 11/22/22 11:25 am 11/22/22 11:25 am 193 OMA Contract:TB-10829 GROSS WEIGHT TARE WEIGHT NET WEIGHT NET TONS 70,500 41,980 28,520 14.26 INBOUND INVOICE Scale In Tare Out Tracking QTYYD 0.00 SW-CONT W/FUELtn Origin:RENTON/KING 100% 14.26 CHANGE: CHECK : Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 II-1IMPORTANT INFORMATIONImportant InformationImportant Information About Your Geotechnical/Environmental Report CONSULTING SERVICES ARE PERFORMED FOR SPECIFIC PURPOSES AND FOR SPECIFIC CLIENTS. Consultants prepare reports to meet the specific needs of specific individuals. A report prepared for a civil engineer may not be adequate for a construction contractor or even another civil engineer. Unless indicated otherwise, your consultant prepared your report expressly for you and expressly for the purposes you indicated. No one other than you should apply this report for its intended purpose without first conferring with the consultant. No party should apply this report for any purpose other than that originally contemplated without first conferring with the consultant. THE CONSULTANT’S REPORT IS BASED ON PROJECT-SPECIFIC FACTORS. A geotechnical/environmental report is based on a subsurface exploration plan designed to consider a unique set of project-specific factors. Depending on the project, these may include the general nature of the structure and property involved; its size and configuration; its historical use and practice; the location of the structure on the site and its orientation; other improvements such as access roads, parking lots, and underground utilities; and the additional risk created by scope-of-service limitations imposed by the client. To help avoid costly problems, ask the consultant to evaluate how any factors that change subsequent to the date of the report may affect the recommendations. Unless your consultant indicates otherwise, your report should not be used (1) when the nature of the proposed project is changed (for example, if an office building will be erected instead of a parking garage, or if a refrigerated warehouse will be built instead of an unrefrigerated one, or chemicals are discovered on or near the site); (2) when the size, elevation, or configuration of the proposed project is altered; (3) when the location or orientation of the proposed project is modified; (4) when there is a change of ownership; or (5) for application to an adjacent site. Consultants cannot accept responsibility for problems that may occur if they are not consulted after factors that were considered in the development of the report have changed. SUBSURFACE CONDITIONS CAN CHANGE. Subsurface conditions may be affected as a result of natural processes or human activity. Because a geotechnical/environmental report is based on conditions that existed at the time of subsurface exploration, construction decisions should not be based on a report whose adequacy may have been affected by time. Ask the consultant to advise if additional tests are desirable before construction starts; for example, groundwater conditions commonly vary seasonally. Construction operations at or adjacent to the site and natural events such as floods, earthquakes, or groundwater fluctuations may also affect subsurface conditions and, thus, the continuing adequacy of a geotechnical/environmental report. The consultant should be kept apprised of any such events and should be consulted to determine if additional tests are necessary. MOST RECOMMENDATIONS ARE PROFESSIONAL JUDGMENTS. Site exploration and testing identifies actual surface and subsurface conditions only at those points where samples are taken. The data were extrapolated by your consultant, who then applied Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 II-2IMPORTANT INFORMATIONjudgment to render an opinion about overall subsurface conditions. The actual interface between materials may be far more gradual or abrupt than your report indicates. Actual conditions in areas not sampled may differ from those predicted in your report. While nothing can be done to prevent such situations, you and your consultant can work together to help reduce their impacts. Retaining your consultant to observe subsurface construction operations can be particularly beneficial in this respect. A REPORT’S CONCLUSIONS ARE PRELIMINARY. The conclusions contained in your consultant’s report are preliminary, because they must be based on the assumption that conditions revealed through selective exploratory sampling are indicative of actual conditions throughout a site. Actual subsurface conditions can be discerned only during earthwork; therefore, you should retain your consultant to observe actual conditions and to provide conclusions. Only the consultant who prepared the report is fully familiar with the background information needed to determine whether or not the report’s recommendations based on those conclusions are valid and whether or not the contractor is abiding by applicable recommendations. The consultant who developed your report cannot assume responsibility or liability for the adequacy of the report’s recommendations if another party is retained to observe construction. THE CONSULTANT’S REPORT IS SUBJECT TO MISINTERPRETATION. Costly problems can occur when other design professionals develop their plans based on misinterpretation of a geotechnical/environmental report. To help avoid these problems, the consultant should be retained to work with other project design professionals to explain relevant geotechnical, geological, hydrogeological, and environmental findings, and to review the adequacy of their plans and specifications relative to these issues. BORING LOGS AND/OR MONITORING WELL DATA SHOULD NOT BE SEPARATED FROM THE REPORT. Final boring logs developed by the consultant are based upon interpretation of field logs (assembled by site personnel), field test results, and laboratory and/or office evaluation of field samples and data. Only final boring logs and data are customarily included in geotechnical/environmental reports. These final logs should not, under any circumstances, be redrawn for inclusion in architectural or other design drawings, because drafters may commit errors or omissions in the transfer process. To reduce the likelihood of boring log or monitoring well misinterpretation, contractors should be given ready access to the complete geotechnical engineering/environmental report prepared or authorized for their use. If access is provided only to the report prepared for you, you should advise contractors of the report’s limitations, assuming that a contractor was not one of the specific persons for whom the report was prepared, and that developing construction cost estimates was not one of the specific purposes for which it was prepared. While a contractor may gain important knowledge from a report prepared for another party, the contractor should discuss the report with your consultant and perform the additional or alternative work believed necessary to obtain the data specifically appropriate for construction cost estimating purposes. Some clients hold the mistaken impression that simply disclaiming responsibility for the accuracy of subsurface information always insulates them from attendant liability. Providing the best available information to contractors helps prevent costly construction problems and the adversarial attitudes that aggravate them to a disproportionate scale. Sound Ford Renton (Sound Transit ROW Nos. RTN001-RTN004)Remedial Action Report 109693-003 February 8, 2024 II-3IMPORTANT INFORMATIONREAD RESPONSIBILITY CLAUSES CLOSELY. Because geotechnical/environmental engineering is based extensively on judgment and opinion, it is far less exact than other design disciplines. This situation has resulted in wholly unwarranted claims being lodged against consultants. To help prevent this problem, consultants have developed a number of clauses for use in their contracts, reports, and other documents. These responsibility clauses are not exculpatory clauses designed to transfer the consultant’s liabilities to other parties; rather, they are definitive clauses that identify where the consultant’s responsibilities begin and end. Their use helps all parties involved recognize their individual responsibilities and take appropriate action. Some of these definitive clauses are likely to appear in your report, and you are encouraged to read them closely. Your consultant will be pleased to give full and frank answers to your questions. The preceding paragraphs are based on information provided by the GBA, Silver Spring, Maryland 8