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HomeMy WebLinkAboutQuendall Phase II ESAPhase II Environmental Site Assessment I-405 Renton to Bellevue Express Toll Lanes Project Sites A and B Renton, Washington for Washington State Department of Transportation January 12, 2018 Phase II Environmental Site Assessment I-405 Renton to Bellevue Express Toll Lanes Project Sites A and B Renton, Washington for Washington State Department of Transportation January 12, 2018 17425 NE Union Hill Road, Suite 250 Redmond, Washington 98052 425.861.6000 January 12, 2018 | Page i File No. 0180-349-00 Table of Contents 1.0 INTRODUCTION ................................................................................................................................. 1 Property Description and Adjacent Site Use Background ................................................................... 1 GeoEngineers Investigation Purpose and Goals .................................................................................. 1 2.0 SCOPE OF SERVICES ........................................................................................................................ 2 Deviations from the GeoEngineers Sampling and Analysis Plan ........................................................ 3 3.0 PHASE I SUMMARY .......................................................................................................................... 4 4.0 POTENTIAL CHEMICALS OF CONCERN AND SCREENING LEVELS ................................................ 4 5.0 PHASE II ESA FINDINGS ................................................................................................................... 4 General ................................................................................................................................................... 4 Soil Conditions ................................................................................................................................ 5 Groundwater Conditions ................................................................................................................. 5 Soil Field Screening and Chemical Analytical Results (Table 1) ......................................................... 5 Groundwater Chemical Analytical Results (Table 2) ............................................................................ 6 6.0 CONCLUSIONS AND RECOMMENDATIONS ..................................................................................... 7 7.0 LIMITATIONS ..................................................................................................................................... 8 8.0 REFERENCES .................................................................................................................................... 9 LIST OF TABLES Table 1. Soil Chemical Analytical Results Table 2. Groundwater Chemical Analytical Results LIST OF FIGURES Figure 1. Vicinity Map Figure 2. Site Plan Figure 3. Soil Chemical Analytical Results Figure 4. Groundwater Chemical Analytical Results APPENDICES Appendix A. Field Procedures and Exploration Logs Figure A-1 – Key to Exploration Logs Figure A-2 through A-14 – Log of Borings Appendix B. Laboratory Reports and Comprehensive Data Tables Appendix C. Investigation-Derived Waste Manifest Appendix D. Report Limitations and Guidelines for Use January 12, 2018 | Page 1 File No. 0180-349-00 1.0 INTRODUCTION This report presents the results of the Phase II Environmental Site Assessment completed in August through September 2017 for the Washington State Department of Transportation (WSDOT) at Sites A and B (subject property) near the intersection of NE 44th Street and Seahawks Way in Renton, Washington (Vicinity Map, Figure 1). A brief description of the subject property is summarized below; more detailed property information is provided in the Phase I ESA report by GeoEngineers provided under separate cover. A summary of Phase I ESA findings is provided in Section 3.0. Please note that this report presents data collected on or near the subject property as part of GeoEngineers’ Phase II ESA. Data collected during previous investigations (completed by others) on or near the subject property are discussed in GeoEngineers’ Phase I ESA report. Property Description and Adjacent Site Use Background Sites A and B are adjacent to Seahawks Way and comprise portions of City of Renton (City) owned right of way (ROW) (Site A) and King County Tax Parcel No. 2924059002 (owned by Quendall Terminals) (Site B). Both sites are located in the northernmost limits of the City of Renton within a former industrial area, and are associated with a planned modified interchange for Interstate 405 (I-405) and other roadway improvements for the WSDOT I-405 Renton to Bellevue Express Toll Lanes project. Current land use within the Sites consist of City ROW along Lake Washington Boulevard North, Seahawks Way/Hazelwood Lane, vacant land, and wetlands and wetland buffer areas. Adjacent site use includes historical industrial properties including the Quendall Terminals property (not in operation), a Superfund site overseen by the Environmental Protection Agency (EPA). The Quendall Terminals Superfund site extends approximately 50-60 feet east from the Quendall Terminals property to a historical Burlington Northern Santa Fe (BNSF) rail line which is no longer in use (soon to be part of a new King County Eastside Rail Corridor [ERC] trail). Other adjacent historical industrial properties include the former Barbee Mill property (now residential; Conner Homes), and the former J.H. Baxter & Company property (now commercial; the Seattle Seahawks Training and Headquarters Facility). Site B comprises a non-contiguous portion of the Quendall Terminals parcel to the northeast of the main property located at 4503 Lake Washington Boulevard North. Please note that while Site A is currently City-owned land that is not assigned a parcel number, it is possible that Site A historically comprised a portion of the Quendall Terminals property (Parcel No. 2924059002) prior to City ROW acquisition. The layout of the subject property and surrounding properties is shown on the Site Plan, Figure 2. GeoEngineers Investigation Purpose and Goals Due to the proximity of Sites A and B to known sites of environmental concern including the Quendall Terminals Superfund site, former Barbee Mill, and former J.H. Baxter & Company properties, WSDOT retained GeoEngineers to conduct a preliminary environmental investigation including Phase I (provided under separate cover) and Phase II Environmental Site Assessments (ESAs). The specific objectives for the Phase II ESA were to identify contaminants of concern (COCs) in soil or groundwater (if any) on the subject property to inform WSDOT’s project design and related acquisition activities for the I-405 project. January 12, 2018 | Page 2 File No. 0180-349-00 Phase II activities were executed in accordance with the Sampling and Analysis Plan (SAP) prepared for WSDOT (reviewed by WSDOT and the EPA), dated August 11, 2017; deviations from the SAP are noted in Section 2.0. GeoEngineers, Inc., (GeoEngineers) is currently providing services to WSDOT under Contract Y-11771, effective June 12, 2017, and associated Amendment No. 1 signed on September 12, 2017. 2.0 SCOPE OF SERVICES The specific scope of services for the Phase II investigation was as follows: 1. Prepared a draft and final SAP in preparation for subsurface Property assessment activities including characterization of soil and groundwater. The SAP was prepared for WSDOT, and reviewed by WSDOT and the EPA. 2. Coordinated field activities with WSDOT, EPA, and the City of Renton prior to subject property entry. 3. Subcontracted a Washington State-licensed drilling company to complete thirteen borings (ten in August, and three in September), shown in Figure 2. The drillers submitted notifications to Ecology prior to commencing work as required by State law. 4. Coordinated underground utility locating using the State underground utility notification system (Washington State’s “One-call” public utility locating service), and a private utility locator to assess for potential underground utilities at the subject property prior to commencing field work. Per state regulations, the planned boring locations were marked prior to initiating the One-Call request. The top 5 feet of borings GEI-11 through GEI-13 (southwest of Site A) were cleared for utilities using air-knife equipment operated by the drilling company due to the proximity of underground utilities to the proposed boring locations. 5. Prepared a Property-Specific Health and Safety Plan (HASP) in accordance with Washington Administrative Code (WAC) 296-24. A copy of the HASP was signed by GeoEngineers, WSDOT, and subcontractor representatives present on site, and was kept on-site for the duration of the associated field activities. 6. Conducted field characterization activities, including monitoring the advancement of 13 direct-push borings at or near the subject property. Borings were completed to a maximum depth of 25 feet below ground surface (bgs). 7. Obtained continuous-core soil samples from borings GEI-1 through GEI-13 for potential chemical analysis. Soil samples were field screened for evidence of contamination using visual, water sheen, and headspace vapor screening methods. Visually classified soil from the borings in general accordance with ASTM D 2488 and maintained a detailed log of each exploration. Grab groundwater samples were collected from eight locations (GEI-2 through GEI-6, GEI-10, GEI-11, and GEI-13) using a peristaltic pump and low-flow sampling techniques. 8. All soil and groundwater samples were stored in an ice-filled cooler for transport to an Ecology-accredited analytical laboratory using the protocols identified in the final SAP. 9. Analyzed select soil and groundwater samples from the borings for chemical analysis based on sample locations and depth relative to potential sources of contamination, field screening results, and sample January 12, 2018 | Page 3 File No. 0180-349-00 depth in relation to the soil/groundwater interface. Soil and groundwater sample chemical analysis was in accordance with the contaminants of potential concern identified in the SAP including:  Gasoline-range petroleum hydrocarbons by Ecology Method NWTPH-Gx;  Diesel- and lube oil-range hydrocarbons by Ecology Method NWTPH-Dx;  Volatile Organic Compounds (VOCs) by United States Environmental Protection Agency (EPA) Method 5035/8260C;  Semivolatile Organic Compounds (SVOCs) by EPA Method 8270D/SIM;  Carcinogenic Polycyclic Aromatic Hydrocarbons (cPAHs) by EPA Method 8270D/SIM;  Polychlorinated Biphenyls (PCBs) by EPA Method 8082A; and  Total and Dissolved Metals (Arsenic, Cadmium, Chromium, Lead, Mercury and Copper) by EPA 6010C/7471B (soil), and 200.8/7470A (groundwater). 10. Stored investigation-derived waste (IDW) generated during boring advancement and sampling in a secure location on the subject property using appropriately-labeled containers. A Washington State-licensed transporter was obtained to profile and transport the IDW to an appropriate landfill for permitted disposal. The associated waste manifest is provided in Appendix C. 11. Evaluated the data with respect to the Model Toxics Control Act (MTCA) Method A and B cleanup levels (CULs). 12. Prepared this report (in conjunction with the Phase I ESA report provided under separate cover) presenting the Phase II ESA findings. Deviations from the GeoEngineers Sampling and Analysis Plan The following deviations from the SAP were executed during this investigation: ■ Borings GEI-8, GEI-9, and GEI-10 were completed just outside (downgradient 1) of Site B (refer to Figure 2) in City of Renton right of way. Drilling was not completed on Site B because site access was not granted to WSDOT prior to the investigation. ■ Boring GEI-6 was shifted approximately 60 feet northeast of the proposed location due to a conflict with marked underground utilities. ■ A second phase of drilling (locations GEI-11, GEI-12, and GEI-13) was completed starting approximately 50 feet to the southwest of Site A in the City of Renton right of way along NE 44th Street. Borings GEI-11, GEI-12, and GEI-13 were completed to support WSDOT decision making regarding design for the I-405 project. An amendment (Amendment No. 1) was prepared by GeoEngineers and signed by WSDOT for the additional services. 1 Downgradient refers to the interpreted direction of groundwater flow from east/southeast to west/northwest across the subject property. January 12, 2018 | Page 4 File No. 0180-349-00 3.0 PHASE I SUMMARY No recognized environmental conditions in connection with the subject property were revealed as part of our Phase I ESA research with the exception of historical site use and related soil and groundwater contamination at the Quendall Terminals property. The following is an excerpt from the Phase I ESA: “Sites A and B were historically upland areas of Quendall Terminals operations. The Quendall Terminals property, located approximately 100 feet west of Site A, was historically used for various industrial purposes including creosote and tar manufacturing, storage of diesel, crude, and waste oil, and log storage. The creosote and tar manufacturing operations that occurred from approximately 1917 to 1969 included shipment operations of finished products on BNSF ERC ROW to the west of the subject property. Loading operations also occurred along the rail alignment, particularly at the location of the former May Creek railroad trestle. The former May Creek Channel received wastes from historical creosote and tar manufacturing, loading, and shipment operations on the Quendall Terminals property and at the railroad trestle location on BNSF ERC ROW. For this reason, the former May Creek Channel, which intersects the southern boundary of Site A likely acts as a significant source area for contaminants of concern on and upgradient of the Quendall Terminals property. The Quendall Terminals Superfund site is therefore considered a REC to the subject property.” 4.0 POTENTIAL CHEMICALS OF CONCERN AND SCREENING LEVELS Based on the findings of the research completed as part of the Phase I ESA and SAP, and the proximity of the subject property to known sites of environmental concern (discussed in Section 1.0) the potential sources of contamination included the Quendall Terminals Superfund site (a REC to the subject property) and the former J.H. Baxter & Company site. Therefore, COCs identified for evaluation during this Phase II ESA are COCs for these two sites of environmental concern which include petroleum hydrocarbons, VOCs, SVOCs (pentachlorophenol [PCP]), cPAHs, PCBs and metals including arsenic, cadmium, chromium, lead, mercury and copper. The media evaluated for the Phase II ESA were soil and groundwater. MTCA Method A cleanup levels for unrestricted land use were used in this report for screening purposes for the Phase II ESA. Where no MTCA Method A values exist, Method B cleanup levels for direct contact were used. The corresponding MTCA cleanup levels are presented in Tables 1 and 2. In our opinion the MTCA cleanup levels presented in this report are appropriate screening levels for this Phase II ESA. 5.0 PHASE II ESA FINDINGS General The Phase II ESA investigation was conducted in two phases on August 16 and 17, and on September 8, 2017. Thirteen direct-push environmental borings were completed at the approximate locations indicated on Figure 2. The boring locations were selected based on the locations of the potential sources of contamination as described further below. The direct-push borings, GEI-1 through GEI-13, extended to total depths ranging between 10 and 25 feet bgs. A representative of GeoEngineers observed and documented subsurface conditions in the borings, and obtained soil samples for field screening and chemical analysis as described in the SAP. Exploration and sampling procedures and the exploration logs are presented in Appendix A. January 12, 2018 | Page 5 File No. 0180-349-00 The rationale for boring locations on or near Sites A and B are as follows: Site A ■ Boring locations on Site A (GEI-1 through GEI-7) were completed at accessible locations nearest to the Quendall Terminals Superfund site on an approximate 40-foot spacing (boring center to center) near the former May Creek Channel. Borings located farthest from the former May Creek Channel (GEI-5 to GEI-7) were completed on an approximate 75- to 100-foot spacing. Grab groundwater samples were collected in borings GEI-2 through GEI-6 – borings located near the former May Creek Channel. ■ Boring locations near Site A (GEI-11 through GEI-13) were completed at accessible locations to the southwest of the former May Creek Channel on an approximate 40-foot spacing. Grab groundwater samples were collected in borings GEI-11 and GEI-13. Site B ■ WSDOT was not provided property access to Site B for the investigation. Accordingly, boring locations near Site B (GEI-8 through GEI-10) were completed at accessible locations as close to Site B as possible. Because the former J.H. Baxter & Company property was not identified as a REC to Site B, borings were completed on an approximate 150- to 200-foot spacing. A grab groundwater sample was collected in boring GEI-10 located approximately 100 feet east (upgradient) of the former J.H. Baxter & Company Property. Soil Conditions Soil conditions encountered beneath the surface (asphalt, gravel, or grass cover) at each boring location primarily consisted of sand with silt and gravel (fill material) to depths ranging from approximately 5 to 16 feet bgs. A black fill layer consisting of sand with silt and occasional debris (brick) was observed in borings GEI-3 and GEI-4 near the former May Creek Channel from approximately 10.5 to 12 feet bgs. The fill layer in each boring was underlain by shallow alluvium (native material) consisting of heterogeneous layers of silt, peat, and/or sand to the maximum depth explored at 25 feet bgs. Groundwater Conditions Groundwater was encountered during drilling in all borings at depths ranging from approximately 5.5 to 18 feet bgs. This is consistent with previous investigations in the area which have identified a shallow aquifer from approximately 6 to 20 feet bgs. Based on surface topography in the vicinity of the site and the close proximity of Lake Washington, the shallow groundwater flow direction is assumed to be west to northwest. Soil Field Screening and Chemical Analytical Results (Table 1) Soil from the explorations was field screened for physical evidence of petroleum and volatiles using visual, water sheen and headspace screening methods; field screening did not indicate evidence of contamination in soil samples from the borings. Field screening results are shown in the exploration logs and are presented in Table 1 for samples that were chemically analyzed. With the absence of field screening evidence of contamination, two soil samples were submitted from each boring (with the exception of GEI-3) for chemical analysis: one from shallow fill soil, and one from the groundwater interface. An additional soil sample was submitted for chemical analysis from boring GEI-3 January 12, 2018 | Page 6 File No. 0180-349-00 from the fill horizon where black sand was observed at approximately 11.5 feet bgs. All soil samples (27 in total) were submitted for chemical analysis of petroleum hydrocarbons, VOCs, SVOCs, cPAHs, PCBs, and metals (Arsenic, Cadmium, Chromium, Lead, Mercury and Copper). Soil sample chemical analytical results are summarized below and presented in Table 1. Copies of the chemical analytical laboratory reports are provided in Appendix B. ■ Gasoline-range petroleum hydrocarbons, PCBs, and metals cadmium and mercury were not detected in the samples tested. ■ Arsenic, chromium, copper and/or lead either were not detected, or were not detected at concentrations greater than MTCA Method A cleanup levels (CULs) in the soil samples tested. ■ VOCs apart from acetone, carbon disulfide, 2-butanone, and tetrachloroethene were not detected in the samples tested. Detected VOCs (acetone, carbon disulfide, 2-butanone, and tetrachloroethene) were not detected at concentrations greater than MTCA Method A CULs in the soil samples tested. Note that acetone, carbon disulfide, and 2-butanone are common laboratory solvents, and that tetrachloroethene was detected below the MTCA Method A CUL in one field duplicate sample (DUP-1) from boring GEI-1 from 3.5 to 4 feet bgs and was not detected in the parent sample (GEI-1-3.5-4). ■ CPAHs and/or naphthalenes were detected above MTCA Method A CULs in fill soil from borings GEI-3 (11.5 - 12 and 15 - 15.5 feet bgs), GEI-4 (10.5 - 11 feet bgs), GEI-5 (1.5 - 2 feet bgs), GEI-6 (1.5 - 2 feet bgs), GEI-7 (5.5 - 6 feet bgs), GEI-8 (0 - 0.5 feet bgs), and GEI-10 (2.5 - 3 feet bgs). CPAHs and naphthalenes were either not detected, or were detected below MTCA CULs in the remaining soil samples analyzed. ■ Oil-range petroleum hydrocarbons were detected above the MTCA Method A CUL of 2,000 milligrams per kilogram (mg/kg) in boring GEI-3 (18,000 mg/kg) from 11.5 to 12 feet bgs, and in boring GEI-4 (4,600 mg/kg) from 10.5 to 11 feet bgs. Oil-range petroleum hydrocarbons were not detected above the MTCA Method A CUL in the remaining soil samples analyzed. Soil chemical analytical results for soil samples tested are summarized in Figure 3. Groundwater Chemical Analytical Results (Table 2) Grab groundwater samples were obtained from borings GEI-2 through GEI-6, GEI-10, GEI-11, and GEI-13 using temporary well points and low-flow sampling methods. Groundwater samples were submitted for chemical analysis of petroleum hydrocarbons, VOCs, SVOCs, cPAHs, PCBs, and total and dissolved metals (Arsenic, Cadmium, Chromium, Lead, Mercury and Copper). Groundwater sample chemical analytical results are summarized below and presented in Table 2. Field procedures are described in Appendix A. Copies of the chemical analytical laboratory reports are provided in Appendix B. ■ Gasoline-, diesel-, and lube oil-range hydrocarbons, PCBs, VOCs (except acetone), naphthalenes, and total metals (except arsenic, chromium, and lead) were not detected in the samples tested. ■ Acetone (a VOC) was detected below the MTCA CUL in groundwater samples from borings GEI-11 and GEI-13. Note that acetone is a common laboratory solvent. ■ Select SVOCs and/or cPAHs were detected below MTCA CULs in groundwater samples from borings GEI-2, GEI-4, GEI-5, GEI-10, GEI-11, and GEI-13. January 12, 2018 | Page 7 File No. 0180-349-00 ■ Total arsenic was detected above the MTCA CUL in groundwater from all borings except GEI-5. However, dissolved arsenic exceeded the MTCA CUL of 5.0 micrograms per liter (µg/L) in only GEI-3 (8.8 µg/L), GEI-6 (9.0 µg/L), GEI-10 (5.1 µg/L), and GEI-13 (64 µg/L). ■ Total chromium and lead were detected above MTCA CULs in groundwater from borings GEI-10 and GEI-11. Dissolved chromium and lead were not detected in groundwater from these same locations. Groundwater chemical analytical results are summarized in Figure 4. All analytical data was validated using Stage 2B manual criteria. The data validation report and associated comprehensive data tables are presented in Appendix B. 6.0 CONCLUSIONS AND RECOMMENDATIONS The Phase II ESA characterized soil and groundwater on or near the subject property to evaluate the potential for contamination from identified off-property potential sources of contamination identified in the Phase I ESA (the Quendall Terminals Superfund site) to inform WSDOT’s project design and related acquisition activities for the I-405 project. A summary of the Phase II findings is as follows: Soil ■ CPAHs and/or naphthalenes were detected above MTCA CULs in shallow fill soil from seven of the boring locations (GEI-3 through GEI-8, and GEI-10) completed at depths ranging from ground surface to 6.5 feet bgs, with the exception of two soil sample locations from borings GEI-3 and GEI-4. CPAHs and/or naphthalenes were detected above MTCA CULs in borings GEI-3 and GEI-4 in fill soil from approximately 10.5 to 15.5 feet bgs; contaminants at this depth appear to be associated with the black fill soil with debris identified at these locations. In general, cPAH and naphthalene contamination appear to be widespread and associated with fill soil from an unknown source or sources. ■ Oil-range petroleum hydrocarbons were detected above the MTCA Method A CUL in borings GEI-3 and GEI-4 from 11.5 to 12 and 10.5 to 11 feet bgs. These soil samples were also collected from the lense of black sandy fill soil with debris observed from approximately 10.5 to 12 feet bgs. ■ Other contaminants of concern including gasoline- and diesel-range petroleum hydrocarbons, PCBs, VOCs, SVOCs, and metals were not detected above MTCA CULs in the soil samples analyzed. Groundwater ■ Contaminants of concern including gasoline-, diesel-, and lube oil-range hydrocarbons, PCBs, PAHs, VOCs, SVOCs, and metals including cadmium, copper, and mercury were not detected in the groundwater samples analyzed, or the detected concentrations did not exceed MTCA CULs. ■ Total arsenic was detected above the MTCA CUL in groundwater from all borings except GEI-5; however, dissolved arsenic exceeded the MTCA CUL in groundwater samples from only GEI-3, GEI-6, GEI-10, and GEI-13. January 12, 2018 | Page 8 File No. 0180-349-00 ■ Total chromium and lead were detected above MTCA CULs in groundwater from borings GEI-10 and GEI-11. Dissolved chromium and lead were either not detected, or were detected below MTCA CULs in groundwater from these same locations. Note that Grab groundwater samples were collected using temporary well points during drilling. Due to the elevated suspended solids typically present in samples collected using this methodology, dissolved metals concentrations are likely more representative of subject property conditions than total metals concentrations. Fill soil on or near both Sites A and B (as represented by soil samples collected from ground surface to approximately 15.5 feet bgs) ranges in thickness from approximately 5.5 feet to 16 feet and has widespread cPAH and naphthalene contamination (above MTCA CULs) in addition to isolated oil-range petroleum hydrocarbon contamination near the former May Creek Channel (borings GEI-3 and GEI-4). Additionally, diesel- and oil-range petroleum hydrocarbons, select VOCs, and PAHs are present in fill soil across Sites A and B at concentrations below MTCA CULs. For this reason, fill soil excavated from the subject property during construction will need to be profiled and transported off-site for permitted disposal at a Subtitle D landfill. Chemical analytical results from native soil samples at depths ranging from 15 to 18 feet bgs indicate that contaminants of concern are not present in this soil horizon (where tested) at concentrations of regulatory significance, and will likely not be subject to special soil handling or end-use requirements. Based on the chemical analytical results, it would be prudent to develop soil and groundwater management and construction contingency plans prior to any future earthwork associated with redevelopment at the Sites. Please note that we did not complete soil sampling on Site B, therefore the environmental conditions on this Site are largely unknown. However, based on analytical results from samples collected as part of this investigation close to the Site B boundary, shallow contamination (cPAHs) may be encountered on Site B at a minimum. 7.0 LIMITATIONS This report has been prepared for use by the Washington State Department of Transportation. No third parties should place legal reliance on this report. GeoEngineers has performed this Phase II ESA in accordance with the scope and limitations of our Agreement with the Washington State Department of Transportation dated September 12, 2017. Within the limitations of scope, schedule and budget, our services have been executed in accordance with generally accepted environmental science practices in this area at the time this report was prepared. No warranty or other conditions, express or implied, should be understood. Any electronic form, facsimile or hard copy of the original document (email, text, table and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Please refer to Appendix C titled “Report Limitations and Guidelines for Use” for additional information pertaining to use of this report. January 12, 2018 | Page 9 File No. 0180-349-00 8.0 REFERENCES GeoEngineers, 2017a. “Phase I Environmental Site Assessment, I-405 Renton to Bellevue Express Toll Lanes Project, Sites A and B, Renton, Washington” prepared for the Washington State Department of Transportation, dated January 12, 2018. GeoEngineers, 2017b. “Phase II Environmental Site Assessment Sampling and Analysis Plan, I-405 Renton to Bellevue Express Toll Lanes Project, Sites A and B, Renton, Washington” prepared for the Washington State Department of Transportation, dated August 11, 2017. T A B L E S Sample Location1 Sample Identification2 GEI-1-3.5-4 DUP-13 GEI-1-17-17.5 GEI-2-3.5-4 GEI-2-15-15.5 GEI-3-1-1.5 GEI-3-11.5-12 GEI-3-15-15.5 GEI-4-2-2.5 GEI-4-10.5-11 GEI-5-1.5-2 GEI-5-12.5-13 GEI-6-1.5-2 GEI-6-6-6.5 Sample Date 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 Sample Depth (feet bgs)3.5 3.5 17 3.5 15 1 11.5 15 2 10.5 1.5 12.5 1.5 6 Field Screening Sheen NS NS NS NS NS NS NS NS NS NS NS NS Headspace (ppm)<1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 Petroleum Hydrocarbons by NWTPH-Gx or NWTPH-Dx (mg/kg) Gasoline-Range <7.2 <6.8 <8.2 <6.1 <8.6 <5.8 <11 <8.8 <5.9 <7.4 <5.5 <9.1 <7.2 <8.9 30/1007 Diesel-Range <27 <27 <32 <26 <34 <26 <1,300 <34 <26 1,100 <26 39 37 <32 Oil-Range <54 <54 <64 <53 <69 <53 18,000 89 <52 4,600 <52 110 220 <64 Total Metals by EPA 6010C/7471B (mg/kg) Arsenic <11 <11 <13 <11 <14 <11 <10 <14 <10 <11 <10 <14 <12 <13 20 Cadmium <0.54 <0.54 <0.64 <0.53 <0.69 <0.53 <0.52 <0.68 <0.52 <0.55 <0.52 <0.68 <0.59 <0.64 2.0 Total Chromium 43 46 47 23 49 24 20 42 23 22 23 50 40 44 2,000 8 Copper 21 22 19 23 22 24 16 17 23 34 21 22 17 18 3,2009 Lead <5.4 <5.4 <6.4 <5.3 <6.9 <5.3 5.4 <6.8 <5.2 13 <5.2 <6.8 <5.9 <6.4 250 Mercury <0.27 <0.27 <0.32 <0.26 <0.34 <0.26 <0.26 <0.34 <0.26 <0.27 <0.26 <0.34 <0.29 <0.32 2.0 Volatile Organic Compounds (VOCs) by EPA Method 8260C (mg/kg) Acetone <0.016 <0.012 0.17 <0.013 0.059 <0.013 0.045 0.12 <0.012 0.081 <0.014 0.063 <0.012 0.062 72,0009 Carbon Disulfide <0.0016 <0.0012 <0.0015 <0.0013 <0.0014 <0.0013 <0.0018 <0.0014 <0.0012 0.0033 <0.0014 <0.0012 <0.0012 <0.0013 8009 2-Butanone <0.0081 <0.0059 0.038 <0.0066 0.012 <0.0063 <0.0091 0.025 <0.0059 0.011 <0.0069 0.013 <0.0061 0.011 4,8009 Tetrachloroethene <0.0032 0.0035 <0.0030 <0.0026 <0.0028 <0.0025 <0.0036 <0.0028 <0.0024 <0.0037 <0.0028 <0.0023 <0.0025 <0.0026 0.05 Other VOCs ND ND ND ND ND ND ND ND ND ND ND ND ND ND varies Polychlorinated Biphenyls (PCBs) by EPA Method 8082A (mg/kg) Total Aroclors ND ND ND ND ND ND ND ND ND ND ND ND ND ND 1 Semivolatile Organic Compounds (SVOCs) and Polycyclic Aromatic Hydrocarbons (PAHs) by EPA Method 8270D/SIM (mg/kg) Acenaphthylene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 <0.10 0.019 <0.0069 2.1 <0.0070 <0.0090 0.072 <0.0086 NE Acenaphthene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 <0.10 <0.0091 <0.0069 0.33 0.020 <0.0090 0.025 <0.0086 4,8009 Fluorene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 <0.10 0.012 <0.0069 0.58 0.015 <0.0090 0.041 <0.0086 3,2009 Phenanthrene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 0.6 0.10 <0.0069 5.0 0.18 <0.0090 0.36 <0.0086 NE Anthracene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 0.19 0.040 <0.0069 5.3 0.030 <0.0090 0.13 <0.0086 NE Fluoranthene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 0.78 0.17 <0.0069 4.6 0.11 <0.0090 0.87 <0.0086 3,2009 Pyrene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 0.010 1.4 0.18 <0.0069 5.5 0.22 <0.0090 0.84 <0.0086 2,4009 Benzo[g,h,i]perylene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 1.0 0.22 <0.0069 5.8 0.069 <0.0090 0.27 <0.0086 NE Naphthalenes by EPA Method 8270D/SIM (mg/kg) Naphthalene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 <0.10 0.029 <0.0069 4.9 0.023 <0.0090 0.021 <0.0086 5.0 1-Methylnaphthalene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 <0.10 0.0097 <0.0069 0.85 0.013 <0.0090 0.0084 <0.0086 34.59 2-Methylnaphthalene <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 <0.10 0.021 <0.0069 1.9 0.015 <0.0090 0.011 <0.0086 3209 Total Naphthalenes4 <0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 <0.10 0.0597 <0.0069 7.65 0.051 <0.0090 0.0404 <0.0086 5.0 Carcinogenic Polycyclic Aromatic Hydrocarbons (cPAHs) by EPA Method 8270D/SIM (mg/kg) Benzo (a) anthracene (TEF 0.1)<0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 0.63 0.13 <0.0069 2.6 0.076 <0.0090 0.44 <0.0086 1.379 Chrysene (TEF 0.01)<0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 1.2 0.17 <0.0069 3.8 0.10 <0.0090 0.52 <0.0086 1379 Benzo (b) fluoranthene (TEF 0.1)<0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 1.2 0.25 <0.0069 5.5 0.080 <0.0090 0.52 <0.0086 1.379 Benzo (j,k) fluoranthene (TEF 0.1)<0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 0.26 0.072 <0.0069 1.5 0.024 <0.0090 0.21 <0.0086 13.79 Benzo (a) pyrene (TEF 1)<0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 1.2 0.20 <0.0069 5.5 0.098 <0.0090 0.45 <0.0086 0.1 Indeno (1,2,3-cd) pyrene (TEF 0.1)<0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 0.82 0.19 <0.0069 4.6 0.048 <0.0090 0.27 <0.0086 1.379 Dibenz (a,h) anthracene (TEF 0.1)<0.0071 <0.0071 <0.0086 <0.0070 <0.0092 <0.0070 0.18 0.046 <0.0069 1.1 0.016 <0.0090 0.078 <0.0086 0.1379 Total cPAHs (TTEC)5 (detect only)N/A N/A N/A N/A N/A N/A 1.521 0.271 N/A 7.068 0.123 N/A 0.607 N/A 0.1 Notes on last page I-5 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Project Renton, Washington GEI-2 GEI-3 GEI-4 GEI-5 GEI-6 2,000 N/A Table 1 Summary of Soil Field Screening and Chemical Analytical Results NS <1 MTCA Cleanup Level6 GEI-1 File No. 0180-349-00 Table 1 | January 12, 2018 Page 1 of 3 Sample Location1 Sample Identification2 Sample Date Sample Depth (feet bgs) Field Screening Sheen Headspace (ppm) Petroleum Hydrocarbons by NWTPH-Gx or NWTPH-Dx (mg/kg) Gasoline-Range Diesel-Range Oil-Range Total Metals by EPA 6010C/7471B (mg/kg) Arsenic Cadmium Total Chromium Copper Lead Mercury Volatile Organic Compounds (VOCs) by EPA Method 8260C (mg/kg) Acetone Carbon Disulfide 2-Butanone Tetrachloroethene Other VOCs Polychlorinated Biphenyls (PCBs) by EPA Method 8082A (mg/kg) Total Aroclors Semivolatile Organic Compounds (SVOCs) and Polycyclic Aromatic Hydrocarbons (PAHs) by EPA Method 8270D/SIM (mg/kg) Acenaphthylene Acenaphthene Fluorene Phenanthrene Anthracene Fluoranthene Pyrene Benzo[g,h,i]perylene Naphthalenes by EPA Method 8270D/SIM (mg/kg) Naphthalene 1-Methylnaphthalene 2-Methylnaphthalene Total Naphthalenes4 Carcinogenic Polycyclic Aromatic Hydrocarbons (cPAHs) by EPA Method 8270D/SIM (mg/kg) Benzo (a) anthracene (TEF 0.1) Chrysene (TEF 0.01) Benzo (b) fluoranthene (TEF 0.1) Benzo (j,k) fluoranthene (TEF 0.1) Benzo (a) pyrene (TEF 1) Indeno (1,2,3-cd) pyrene (TEF 0.1) Dibenz (a,h) anthracene (TEF 0.1) Total cPAHs (TTEC)5 (detect only) Notes on last page I-5 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Project Renton, Washington Table 1 Summary of Soil Field Screening and Chemical Analytical Results GEI-7-2-2.5 GEI-7-5.5-6 GEI-8-0-0.5 GEI-8-6.25-6.75 GEI-9-2.5-3 GEI-9-5.5-6 GEI-10-2.5-3 GEI-10-5.5-6 GEI-11-5.5-6 GEI-11-15.5-16 GEI-12-5-5.5 GEI-12-17.5-18 GEI-13-5-5.5 GEI-13-15-15.5 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 2 5.5 0.5 6.5 2.5 5.5 2.5 5.5 5.5 15.5 5 17.5 5 15 NS NS NS NS NS NS NS NS NS NS NS NS NS NS <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <9.0 <7.0 <7.0 <7.1 <9.7 <7.5 <7.6 <8.8 <7.2 <7.2 <7.5 <5.5 <6.8 <6.3 30/1007 39 <30 54 <33 <30 <31 <32 <62 <29 <31 <29 <28 <29 <31 <65 <61 300 <65 <59 <63 <65 <57 63 <62 <59 <55 87 <61 <13 <12 <10 <13 <12 <13 15 <13 <11 <12 <12 <11 <12 <12 20 <0.65 <0.61 <0.51 <0.65 <0.59 <0.63 <0.57 <0.64 <0.57 <0.62 <0.59 <0.55 <0.59 <0.61 2.0 42 39 23 42 41 38 47 38 43 31 43 29 47 29 2,000 8 27 16 21 15 22 15 30 13 22 11 20 8.6 28 11 3,2009 14 <6.1 19 <6.5 <5.9 <6.3 23 <6.4 <5.7 <6.2 <5.9 <5.5 <5.9 <6.1 250 <0.33 <0.30 <0.26 <0.33 <0.29 <0.31 <0.28 <0.32 <0.29 <0.31 <0.29 <0.27 <0.29 <0.31 2.0 0.15 0.084 <0.013 0.034 <0.021 0.046 0.020 0.020 0.028 0.041 0.013 0.020 <0.0058 0.042 72,0009 <0.0019 <0.0011 <0.0013 <0.0013 <0.0021 <0.0012 <0.0010 <0.0012 <0.0027 <0.0019 <0.0025 <0.0021 <0.0020 0.0029 8009 0.033 0.016 <0.0065 0.0081 <0.011 0.0090 <0.0052 <0.0061 <0.0078 <0.0055 <0.0073 <0.0063 <0.0058 <0.0059 4,8009 <0.0038 <0.0021 <0.0026 <0.0026 <0.0042 <0.0024 <0.0021 <0.0025 <0.0016 <0.0011 <0.0015 <0.0013 <0.0012 <0.0012 0.05 ND ND ND ND ND ND ND ND ND ND ND ND ND ND varies ND ND ND ND ND ND ND ND ND ND ND ND ND ND 1 <0.0087 0.0089 0.040 <0.0087 <0.0079 <0.0084 0.076 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 NE 0.0094 <0.0081 0.12 <0.0087 <0.0079 <0.0084 0.041 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 4,8009 0.0099 <0.0081 0.075 <0.0087 <0.0079 <0.0084 0.037 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 3,2009 0.089 0.018 1.0 <0.0087 <0.0079 <0.0084 0.29 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 0.020 <0.0082 NE 0.027 0.013 0.21 <0.0087 <0.0079 <0.0084 0.14 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 NE 0.13 0.073 0.97 <0.0087 <0.0079 <0.0084 0.83 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 0.012 <0.0082 3,2009 0.14 0.069 1.4 <0.0087 <0.0079 <0.0084 1.0 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 0.025 <0.0082 2,4009 0.087 0.020 0.64 <0.0087 <0.0079 <0.0084 0.69 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 0.0084 <0.0082 NE <0.0087 <0.0081 0.11 <0.0087 <0.0079 <0.0084 0.042 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 5.0 <0.0087 <0.0081 0.072 <0.0087 <0.0079 <0.0084 0.023 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 34.59 <0.0087 <0.0081 0.077 <0.0087 <0.0079 <0.0084 0.027 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 3209 <0.0087 <0.0081 0.259 <0.0087 <0.0079 <0.0084 0.092 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 5.0 0.065 0.041 0.59 <0.0087 <0.0079 <0.0084 0.50 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 0.0091 <0.0082 1.379 0.087 0.056 0.79 <0.0087 <0.0079 <0.0084 0.62 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 0.013 <0.0082 1379 0.11 0.047 0.87 <0.0087 <0.0079 <0.0084 1.1 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 0.011 <0.0082 1.379 0.038 0.016 0.22 <0.0087 <0.0079 <0.0084 0.36 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 13.79 0.093 0.038 0.80 <0.0087 <0.0079 <0.0084 0.85 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 0.011 <0.0082 0.1 0.071 0.021 0.51 <0.0087 <0.0079 <0.0084 0.64 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 1.379 0.018 <0.0081 0.14 <0.0087 <0.0079 <0.0084 0.16 <0.0086 <0.0076 <0.0083 <0.0079 <0.0073 <0.0078 <0.0082 0.1379 0.124 0.051 1.041 N/A N/A N/A 1.132 N/A N/A N/A N/A N/A 0.013 N/A 0.1 GEI-7 I-5 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Project Renton, Washington 2,000 Table 1 Summary of Soil Field Screening and Chemical Analytical Results GEI-10GEI-8 GEI-9 N/A GEI-11 GEI-12 GEI-13 MTCA Cleanup Level6 File No. 0180-349-00 Table 1 | January 12, 2018 Page 2 of 3 Notes: 1 Sample locations are shown on Figure 2. Chemical analysis performed by OnSite Environmental, Inc. of Redmond, Washington. 2 Sample identification is the boring location-depth interval (i.e., soil sample GEI-1-3.5-4 was a soil sample collected from boring GEI-1 from 3.5 to 4 feet bgs). 3 Duplicate sample DUP-1 obtained for sample GEI-1-3.5-4. 4 Total naphthalenes consists of 1-methylnaphthalene, 2-methylnaphthalene and naphthalene. 5 Total Toxic Equivalent Concentration (TTEC) is the sum of each individual cPAH concentration multiplied by its corresponding TEF. 6 Model Toxics Control Act (MTCA) Method A Soil Cleanup Level for Unrestricted Land Use. MTCA B Soil Cleanup Levels are used when no Method A Cleanup Level exists. 7 When benzene is present, the gasoline range cleanup level is 30 mg/kg. When benzene is not present the gasoline cleanup level is 100 mg/kg. 8 Model Toxics Control Act (MTCA) Method A Cleanup Level for Trivalent Chromium. 9Method B Cleanup Level for Unrestricted Land Use represented because MTCA Method A cleanup level has not been established. bgs = below ground surface EPA = U.S. Environmental Protection Agency mg/kg = milligrams per kilogram µg/kg = micrograms per kilogram MTCA = Model Toxics Control Act N/A = not applicable ND = not detected NE = not established NS = no sheen TEF = Toxicity Equivalency Factor as defined in WAC 173-340-900 Table 708-2 < = compound was not detected at a concentration greater than the indicated laboratory detection limit. Bold indicates analyte was detected. Notes: 1 Sample locations are shown on Figure 2. Chemical analysis performed by OnSite Environmental, Inc. of Redmond, Washington. 2 Sample identification is the boring location-depth interval (i.e., soil sample GEI-1-3.5-4 was a soil sample collected from boring GEI-1 from 3.5 to 4 feet bgs). 3 Duplicate sample DUP-1 obtained for sample GEI-1-3.5-4. 4 Total naphthalenes consists of 1-methylnaphthalene, 2-methylnaphthalene and naphthalene. 5 Total Toxic Equivalent Concentration (TTEC) is the sum of each individual cPAH concentration multiplied by its corresponding TEF. 6 Model Toxics Control Act (MTCA) Method A Soil Cleanup Level for Unrestricted Land Use. MTCA B Soil Cleanup Levels are used when no Method A Cleanup Level exists. 7 When benzene is present, the gasoline range cleanup level is 30 mg/kg. When benzene is not present the gasoline cleanup level is 100 mg/kg. 8 Model Toxics Control Act (MTCA) Method A Cleanup Level for Trivalent Chromium. 9Method B Cleanup Level for Unrestricted Land Use represented because MTCA Method A cleanup level has not been established. bgs = below ground surface EPA = U.S. Environmental Protection Agency mg/kg = milligrams per kilogram µg/kg = micrograms per kilogram MTCA = Model Toxics Control Act N/A = not applicable ND = not detected NE = not established NS = no sheen TEF = Toxicity Equivalency Factor as defined in WAC 173-340-900 Table 708-2 < = compound was not detected at a concentration greater than the indicated laboratory detection limit. Bold indicates analyte was detected. Shading indicates analyte was detected at a concentration greater than the MTCA soil cleanup level. File No. 0180-349-00 Table 1 | January 12, 2018 Page 3 of 3 Sample Location1 GEI-3 GEI-4 GEI-5 GEI-6 GEI-10 GEI-11 GEI-13 Sample Identification2 GEI-2-081617 DUP-23 GEI-3-081617 GEI-4-081617 GEI-5-081717 GEI-6-081717 GEI-10-081717 GEI-11-090817 GEI-13-090817 Sample Date 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/17/2017 8/17/2017 8/17/2017 9/8/2017 9/8/2017 Screened Interval (feet bgs)18 - 23 15 - 20 15 - 20 10 - 15 7 - 12 20-25 15-20 Petroleum Hydrocarbons by NWTPH-Gx or NWTPH-Dx (µg/L) Gasoline-Range <100 <100 <100 <100 <100 <100 <100 <100 <100 800/1,0007 Diesel-Range <260 <260 <270 <260 <260 <270 <270 <290 <270 Oil-Range <420 <420 <430 <410 <420 <430 <440 <470 <430 Total Metals by EPA 200.8/7470A (µg/L) Arsenic 8.4 8.9 110 9.5 4.5 12 23 24 75 5.0 Cadmium <4.4 <4.4 <4.4 <4.4 <4.4 <4.4 <4.4 <4.4 <4.4 5.0 Total Chromium <11 <11 <11 <11 21 <11 200 220 <11 50 Copper <11 <11 <11 <11 <11 <11 100 110 <11 6408 Lead 1.7 <1.1 <1.1 <1.1 2.2 <1.1 17 23 <1.1 15 Mercury <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 2.0 Dissolved Metals by EPA 200.8/7470A (µg/L) Arsenic <3.0 <3.0 8.8 <3.0 <3.0 9.0 5.1 4.5 64 5.0 Cadmium <4.0 <4.0 <4.0 <4.0 <4.0 <4.0 <4.0 <4.0 <4.0 5.0 Chromium <10 <10 <10 <10 <10 <10 <10 <10 <10 50 Copper <10 <10 <10 <10 <10 <10 <10 <10 <10 6408 Lead <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 1.3 <1.0 15 Mercury <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 2.0 Volatile Organic Compounds (VOCs) by EPA Method 8260C (µg/L) Acetone <6.4 <6.4 <6.4 <6.4 <6.4 <6.4 <6.4 7.2 5.3 72008 Other VOCs ND ND ND ND ND ND ND ND ND varies Polychlorinated Biphenyls (PCBs) by EPA Method 8082A (µg/L) Total Aroclors ND ND ND ND ND ND ND ND ND 0.1 Semivolatile Organic Compounds (SVOCs) and Polycyclic Aromatic Hydrocarbons (PAHs) by EPA Method 8270D/SIM (µg/L) Acenaphthene 0.13 <0.096 <0.10 <0.098 <0.098 <0.098 <0.11 0.29 0.19 9608 Phenanthrene 0.14 <0.0096 <0.010 <0.0098 <0.0098 <0.0098 <0.011 <0.10 <0.10 NE Pyrene <0.099 <0.096 <0.10 <0.098 <0.098 <0.098 <0.11 <0.10 0.32 4808 Benzo[g,h,i]perylene 0.016 <0.0096 <0.010 0.018 <0.0098 <0.0098 <0.011 <0.010 <0.010 NE Naphthalenes by EPA Method 8270D/SIM (µg/L) Total Naphthalenes4 ND ND ND ND ND ND ND ND ND 160 Carcinogenic Polycyclic Aromatic Hydrocarbons (cPAHs) by EPA Method 8270D/SIM (µg/L) Benzo (a) anthracene (TEF 0.1)0.020 <0.0096 <0.010 <0.0098 <0.0098 <0.0098 0.017 <0.010 <0.010 0.128 Chrysene (TEF 0.01)0.024 <0.0096 <0.010 0.013 0.014 <0.0098 0.019 <0.010 <0.010 12.08 Benzo (b) fluoranthene (TEF 0.1)0.028 <0.0096 <0.010 0.017 0.011 <0.0098 0.019 <0.010 <0.010 0.128 Benzo (j,k) fluoranthene (TEF 0.1)<0.0099 <0.0096 <0.010 <0.0098 <0.0098 <0.0098 <0.011 <0.010 <0.010 1.28 Benzo (a) pyrene (TEF 1)0.024 <0.0096 <0.010 0.017 0.011 <0.0098 0.017 <0.010 <0.010 0.1 Indeno (1,2,3-cd) pyrene (TEF 0.1)0.015 <0.0096 <0.010 0.020 <0.0098 <0.0098 0.013 <0.010 <0.010 0.128 Dibenz (a,h) anthracene (TEF 0.1)<0.0099 <0.0096 <0.010 <0.0098 <0.0098 <0.0098 <0.011 <0.010 <0.010 0.0128 Total cPAHs(TTEC)5 (detect only)0.031 N/A N/A 0.021 0.012 N/A 0.022 N/A N/A 0.1 Notes on last page Table 2 Summary of Groundwater Chemical Analytical Results I-5 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Project Renton, Washington 16 - 21 MTCA Cleanup Level6 GEI-2 500 File No. 0180-349-00 Table 2 | January 12, 2018 Page 1 of 2 Notes: 1 Sample locations are shown on Figure 2. Chemical analysis performed by OnSite Environmental, Inc. of Redmond, Washington. 2 Sample identification is the boring location-date (i.e., groundwater sample GEI-2-081617 was a groundwater sample collected from boring GEI-2 on August 16, 2017. 3 Duplicate sample DUP-1 obtained for sample GEI-2-081617. 4 Total naphthalenes consists of 1-methylnaphthalene, 2-methylnaphthalene and naphthalene. 5 Total Toxic Equivalent Concentration (TTEC) is the sum of each individual cPAH concentration multiplied by its corresponding TEF. 6 Model Toxics Control Act (MTCA) Method A Groundwater Cleanup Level. MTCA B Groundwater Cleanup Levels are used when no Method A Cleanup Level exists. 7 When benzene is present, the gasoline range cleanup level is 0.8 mg/L. When benzene is not present the gasoline cleanup level is 1.0 mg/L. 8Method B Cleanup Level represented because MTCA Method A cleanup level has not been established. bgs = below ground surface EPA = U.S. Environmental Protection Agency mg/L = milligrams per liter µg/L = micrograms per liter MTCA = Model Toxics Control Act N/A = not applicable ND = not detected NE = not established TEF = Toxicity Equivalency Factor as defined in WAC 173-340-900 Table 708-2 < = compound was not detected at a concentration greater than the indicated laboratory detection limit. Bold indicates analyte was detected. Shading indicates analyte was detected at a concentration greater than the MTCA groundwater cleanup level. File No. 0180-349-00 Table 2 | January 12, 2018 Page 2 of 2 F I G U R E S μ SITES Vicinity Map Figure 1 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Renton, Washington 2,000 2,0000 Feet Data Source: Mapbox Open Street Map, 2016 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. Projection: NAD 1983 UTM Zone 10N P: \ 0 \ 0 1 8 0 3 4 9 \ G I S \ P 0 1 8 0 3 4 9 0 0 t s k 3 0 0 _ F 0 1 _ V M . m x d D a t e E x p o r t e d : 0 6 / 2 6 / 1 7 b y c c a b r e r a SITES Metal Total Metals (ug/L) Dissolved Metals (ug/L) Ar 8.4 ND Metal Total Metals (ug/L) Dissolved Metals (ug/L) Ar 110 8.8 Metal Total Metals (ug/L) Dissolved Metals (ug/L) Ar 9.5 ND Metal Total Metals (ug/L) Dissolved Metals (ug/L) Ar 4.5 ND Metal Total Metals (ug/L) Dissolved Metals (ug/L) Ar 12 9.0 Metal Total Metals (ug/L) Dissolved Metals (ug/L) Ar 23 5.1 Cr 200 ND Pb 17 ND Metal Total Metals (ug/L) Dissolved Metals (ug/L) Ar 24 4.5 Cr 220 ND Pb 23 1.3 Metal Total Metals (ug/L) Dissolved Metals (ug/L) Ar 75 64 A P P E N D I C E S APPENDIX A Field Procedures and Exploration Logs January 12, 2018 | Page A-1 File No. 0180-349-00 APPENDIX A FIELD PROCEDURES AND EXPLORATION LOGS Underground Utility Locate Prior to drilling activities, an underground utility locate was conducted in the vicinity of each proposed boring locations to identify subsurface utilities and/or potential underground physical hazards. The underground utility check consisted of contacting a local utility alert service (1-call) and hiring a private utility locating service. Proposed (and final) boring locations were located using GIS enabled ipads with a reported vertical and horizontal accuracy of ± 5 to 10 feet depending on satellite signal strength and geographic location. Soil Sampling Environmental exploration was completed using track-mounted direct-push drilling equipment operated by Cascade Drilling of Woodinville, Washington. Continuous soil cores were obtained from the direct-push borings using 2 ¼-inch diameter, 4-foot-long stainless-steel sampler rods driven with a pneumatic hammer. Soil samples were collected in clean, plastic 1.5-inch-diameter disposable liners. The liners were placed inside the sampling rod and then hydraulically driven or pushed into the soil at the selected sampling depth. The borings extended to depths ranging between 10 and 25 feet bgs. A representative from our staff observed and classified the soil encountered during explorations. Soil in the explorations was visually classified in general accordance with ASTM International (ASTM) D 2488-94. The exploration logs are presented in Figures A-2 through A-14. A portion of each sample was placed in laboratory-prepared sample jars for possible chemical analysis. The remaining portion of each sample was used for field screening. Selected samples from the borings were submitted for chemical analysis based on the sample location relative to potential sources of contamination. The soil samples were placed in a cooler with ice for transport to Onsite Environmental in Redmond, Washington. Standard chain-of-custody procedures were followed in transporting the soil samples to the laboratory. Drill cuttings and decontamination/purge water generated during drilling activities were stored at the Site in 25- or 55-gallon drums. Sample Identification Scheme Each soil sample obtained during the investigation was identified by a unique sample designation. The sample designation was documented in the field report and exploration log, and included on the sample container label and laboratory chain-of-custody. The soil sample designation scheme is as follows: ■ Boring number GEI-1 etc., followed by the depth range from which the soil sample was collected, to the nearest 0.25- or 0.5-foot. For example, GEI-1-3.5-4 is from boring number GEI-1, and sampled from a depth of 3.5 to 4.0 feet bgs. Groundwater Sample Collection and Handling Grab groundwater samples were obtained from borings using a temporary well point and screen, and a peristaltic pump with dedicated Teflon tubing at low-flow sampling rates. The groundwater was pumped at approximately 0.5 liter per minute until the water purged clear, after which samples were collected at a January 12, 2018| Page A-2 File No. 0180-349-00 flow rate of approximately 0.5 liter per minute (low-flow). Purging generated wastewater which was drummed and temporarily stored on the property pending off-site disposal. The groundwater samples were transferred directly from the tubing outlet to laboratory-prepared sample containers. New nitrile gloves were worn when collecting the groundwater sample. The sample containers were filled completely and placed in a cooler with ice pending transport to the analytical laboratory. Sample labels were completed and chain-of-custody procedures were followed in transporting the sample to the laboratory. Field Screening of Soil Samples Soil samples obtained from the borings were screened in the field for evidence of contamination using: (1) visual examination; (2) sheen screening and (3) vapor headspace screening with a photoionization detector (PID). The results of headspace and sheen screening are included in the boring logs and in Table 1 for soil samples tested by chemical analysis. Visual screening consists of inspecting the soil for stains indicative of petroleum-related contamination. Visual screening is generally more effective when contamination is related to heavy petroleum hydrocarbons, such as motor oil or hydraulic oil, or when hydrocarbon concentrations are high. Sheen screening and headspace vapor screening are more sensitive methods that have been effective in detecting contamination at concentrations less than regulatory cleanup guidelines. Sheen screening involves placing soil in a pan of water and observing the water surface for signs of sheen. Sheen classifications are as follows: No Sheen (NS): No visible sheen on water surface. Slight Sheen (SS): Light, colorless, dull sheen; spread is irregular, not rapid; sheen dissipates rapidly. Moderate Sheen (MS): Light to heavy sheen, may have some color/iridescence; spread is irregular to flowing; few remaining areas of no sheen on water surface. Heavy Sheen (HS): Heavy sheen with color/iridescence; spread is rapid; entire water surface may be covered with sheen. Headspace vapor screening involves placing a soil sample in a plastic sample bag. Air is captured in the bag and the bag is shaken to expose the soil to the air trapped in the bag. The probe of a PID is inserted in the bag and the instrument measures the concentration of combustible vapor in the air removed from the sample headspace. The PID measures concentrations in ppm (parts per million) and is calibrated to isobutylene. The PID is designed to quantify combustible gas and organic vapor concentrations up to 2,500 ppm. A lower threshold of significance of 1 ppm was used in this application. Field screening results are Site-specific and vary with soil type, soil moisture content, temperature and type of contaminant. Boring Backfilling The borings were backfilled with bentonite and quick-set concrete and restored to match the surrounding surface in accordance with applicable regulations for borehole abandonment. Measured groundwater level in exploration, well, or piezometer Measured free product in well or piezometer Distinct contact between soil strata Approximate contact between soil strata Contact between geologic units SYMBOLS TYPICAL DESCRIPTIONS GW GP SW SP SM FINE GRAINED SOILS SILTS AND CLAYS NOTE: Multiple symbols are used to indicate borderline or dual soil classifications MORE THAN 50% RETAINED ON NO. 200 SIEVE MORE THAN 50% PASSING NO. 200 SIEVE GRAVEL AND GRAVELLY SOILS SC LIQUID LIMIT LESS THAN 50 (APPRECIABLE AMOUNT OF FINES) (APPRECIABLE AMOUNT OF FINES) COARSE GRAINED SOILS MAJOR DIVISIONS GRAPH LETTER GM GC ML CL OL SILTS AND CLAYS SANDS WITH FINES SAND AND SANDY SOILS MH CH OH PT (LITTLE OR NO FINES) CLEAN SANDS GRAVELS WITH FINES CLEAN GRAVELS (LITTLE OR NO FINES) WELL-GRADED GRAVELS, GRAVEL -SAND MIXTURES CLAYEY GRAVELS, GRAVEL - SAND -CLAY MIXTURES WELL-GRADED SANDS, GRAVELLYSANDS POORLY-GRADED SANDS, GRAVELLYSAND SILTY SANDS, SAND - SILT MIXTURES CLAYEY SANDS, SAND - CLAYMIXTURES INORGANIC SILTS, ROCK FLOUR,CLAYEY SILTS WITH SLIGHTPLASTICITY INORGANIC CLAYS OF LOW TOMEDIUM PLASTICITY, GRAVELLYCLAYS, SANDY CLAYS, SILTY CLAYS,LEAN CLAYS ORGANIC SILTS AND ORGANIC SILTYCLAYS OF LOW PLASTICITY INORGANIC SILTS, MICACEOUS ORDIATOMACEOUS SILTY SOILS INORGANIC CLAYS OF HIGHPLASTICITY ORGANIC CLAYS AND SILTS OFMEDIUM TO HIGH PLASTICITY PEAT, HUMUS, SWAMP SOILS WITHHIGH ORGANIC CONTENTSHIGHLY ORGANIC SOILS SOIL CLASSIFICATION CHART MORE THAN 50% OF COARSE FRACTION RETAINED ON NO. 4 SIEVE MORE THAN 50% OF COARSE FRACTION PASSING ON NO. 4 SIEVE SILTY GRAVELS, GRAVEL - SAND -SILT MIXTURES POORLY-GRADED GRAVELS,GRAVEL - SAND MIXTURES LIQUID LIMIT GREATER THAN 50 Continuous Coring Bulk or grab Direct-Push Piston Shelby tube Standard Penetration Test (SPT) 2.4-inch I.D. split barrel Contact between soil of the same geologic unit Material Description Contact Graphic Log Contact NOTE: The reader must refer to the discussion in the report text and the logs of explorations for a proper understanding of subsurface conditions. Descriptions on the logs apply only at the specific exploration locations and at the time the explorations were made; they are not warranted to be representative of subsurface conditions at other locations or times. Groundwater Contact Blowcount is recorded for driven samplers as the number of blows required to advance sampler 12 inches (or distance noted). See exploration log for hammer weight and drop. "P" indicates sampler pushed using the weight of the drill rig. "WOH" indicates sampler pushed using the weight of the hammer. Key to Exploration Logs Figure A-1 Sampler Symbol Descriptions ADDITIONAL MATERIAL SYMBOLS NS SS MS HS No Visible Sheen Slight Sheen Moderate Sheen Heavy Sheen Sheen Classification SYMBOLS Asphalt Concrete Cement Concrete Crushed Rock/ Quarry Spalls Topsoil GRAPH LETTER AC CC SOD Sod/Forest Duff CR DESCRIPTIONS TYPICAL TS Laboratory / Field Tests %F %G AL CA CP CS DD DS HA MC MD Mohs OC PM PI PP SA TX UC VS Percent fines Percent gravel Atterberg limits Chemical analysis Laboratory compaction test Consolidation test Dry density Direct shear Hydrometer analysis Moisture content Moisture content and dry density Mohs hardness scale Organic content Permeability or hydraulic conductivity Plasticity index Pocket penetrometer Sieve analysis Triaxial compression Unconfined compression Vane shear Light brown fine to coarse sand with silt and gravel (medium dense, moist) (fill) Light gray silty fine to coarse sand with occasional gravel (medium dense, moist) (fill) Brown silt with sand (stiff, moist) Becomes brown-gray Brown silty fine to medium sand (medium dense, wet) GEI-1-3.5-4 Dup-1 CA GEI-1-17-17.5 CA 48 50 40 12 36 SP-SM SM ML SM Groundwater observed at approximately 17½ feet below ground surface during drilling NS NS NS NS NS NS <1 <1 <1 <1 <1 <1 Notes: 8/16/2017 8/16/2017 20 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841303044.175 197002.0726 45 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 20 El e v a t i o n ( f e e t ) 40 35 30 25 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-1 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-2 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Brown fine to coarse sand with silt and gravel (medium dense, moist) Brown silty fine to coarse sand (medium dense, moist) Brown silt with sand (medium stiff, moist) Becomes trace sand Brown gray fine to medium sand with silt (medium dense, moist) Brown gray fine to medium sand with trace silt (medium dense, wet) Gray silt with sand (medium stiff, moist) GEI-2-3.5-4 CA GEI-2-15-15.5 48 6 30 52 12 SP-SM SM ML SP SP ML Groundwater observed at approximately 15½ feet below ground surface during drilling Groundwater samples GEI-2-081617 and DUP-2 collected NS NS NS NS NS NS NS NS NS <1 <1 <1 <1 <1 <1 <1 <1 <1 Notes: 8/16/2017 8/16/2017 21 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841303004.67 197004.8094 42 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 20 El e v a t i o n ( f e e t ) 40 35 30 25 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-2 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-3 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Brown fine to coarse sand with silt and gravel (medium dense, moist) (fill) Black fine to coarse sand with silt and gravel (medium dense, moist) (fill) Brown fine to coarse sand with silt (medium dense, moist) (fill) Brown fine to medium sand with silt (medium dense, wet) (fill) Gray fine to medium sand with trace silt (medium dense, wet) (fill) Brown silt with sand (medium stiff, wet) Brown fine to medium sand with silt (medium dense, wet) Gray silt with sand (medium stiff, moist) GEI-3-1-1.5 CA GEI-3-11.5-12 CA GEI-3-15-15.5 CA 24 40 40 36 0 SP-SM SP-SM SP-SM SP-SM SP ML SP-SM ML Groundwater observed at approximately 15 feet below ground surface during drilling Groundwater sample GEI 3-081617 collected NS NS NS NS NS NS <1 <1 <1 <1 <1 <1 Notes: 8/16/2017 8/16/2017 23 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841302956.757 197008.019 43 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 20 El e v a t i o n ( f e e t ) 40 35 30 25 20 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-3 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-4 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Light brown fine to coarse sand with silt and gravel (loose, moist) (fill) Brown silty fine to coarse sand (medium dense, moist) (fill) Gray silt with sand (medium stiff, moist) (fill) Black fine to coarse sand with silt and occasional brick pieces (medium dense, moist) (fill) Gray fine to medium sand with silt (medium dense, moist) (fill) Gray silt with sand (medium stiff, moist) GEI-4-2-2.5 CA GEI-4-10.5-11 CA 36 24 36 1.5 SP-SM SM ML SP-SM SP-SM ML Groundwater observed at approximately 16 feet below ground surface during drilling Groundwater sample GEI 4-081617 collected NS NS <1 <1 Notes: 8/16/2017 8/16/2017 20 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841302979.743 197043.5337 40 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 20 El e v a t i o n ( f e e t ) 35 30 25 20 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-4 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-5 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) becomes wet Light brown fine to coarse sand with silt and gravel (medium dense, moist) (fill) Brown silty fine to coarse sand with occasional gravel (medium dense, moist) (fill) Gray-brown silty fine to medium sand (medium dense, moist) (fill) Gray silt with sand (medium stiff, moist) (fill) Gray silty fine to medium sand (medium dense, wet) (fill) Gray fine to medium sand with silt (medium dense, wet) (fill) Brown silt with sand (medium stiff, wet) GEI-5-1.5-2 CA GEI-5-12.5-13 CA 26 30 40 36 SP-SM SM SM ML SM SP-SM ML Groundwater observed at approximately 13 feet below ground surface during drilling Groundwater sample GEI-5-031717 collected NS NS NS NS NS <1 <1 <1 <1 <1 Notes: 8/17/2017 8/17/2017 20 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841302998.334 197085.6029 38 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 20 El e v a t i o n ( f e e t ) 35 30 25 20 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-5 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-6 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Light brown fine to coarse sand with silt (medium dense, moist) (fill) Brown fine to coarse sand with silt (medium dense, moist) (fill) Brown to gray silty fine to coarse sand (medium dense, moist) (fill) Gray silt with sand (medium stiff, moist) (fill) Gray fine to medium sand with silt (medium dense, wet) (fill) Peat Gray fine to medium sand with silt (medium dense, wet) GEI-6-1.5-2 CA GEI-6-6-6.5 CA 30 30 40 SP-SM SP-SM SM ML SP-SM Peat SP-SM Groundwater observed at approximately 6 feet below ground surface during drilling Groundwater sample GEI-6-081717 collected NS NS NS NS NS <1 <1 <1 <1 <1 Notes: 8/17/2017 8/17/2017 15 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841303049.843 197165.5967 35 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 El e v a t i o n ( f e e t ) 30 25 20 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-6 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-7 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Light brown fine to coarse sand with silt (medium dense, moist) (fill) Brown silty fine to coarse sand (medium dense, moist) (fill) Grades to gray Gray fine to medium sand with silt (medium dense, moist) (fill) GEI-7-2-2.5 CA GEI-7-5.5-6 CA 36 36 SP-SM SM SP-SM Groundwater observed at approximately 6 feet below ground surface during drilling NS NS <1 <1 Notes: 8/17/2017 8/17/2017 10 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841303091.538 197226.1627 33 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 El e v a t i o n ( f e e t ) 30 25 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-7 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-8 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Light brown fine to coarse sand with silt and gravel (medium dense, moist) (fill) Shades to brown Gray silt with sand (medium stiff, wet) Gray fine to medium sand with silt (medium dense, wet) Gray silty fine to medium sand (medium dense, wet) Gray silt with sand (medium stiff, wet) Gray silty fine to medium sand (medium dense, wet) GEI-8-0-0.5 CA GEI-8-6.25-6.75 CA SP-SM ML SP-SM SM ML SM Groundwater observed at approximately 6½ feet below ground surface during drilling NS NS NS <1 <1 <1 Notes: 8/17/2017 8/17/2017 10 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841303204.729 197414.8634 31 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 El e v a t i o n ( f e e t ) 30 25 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-8 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-9 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Light brown fine to coarse sand with silt and gravel (medium dense, moist) (fill) Brown-gray silt with sand (medium stiff, moist) Brown-gray fine to medium sand with silt (medium dense, wet) GEI-9-2.5-3 CA GEI-9-5.5-6 CA 36 40 SP-SM ML SP-SM Groundwater observed at approximately 6 feet below ground surface during drilling NS NS NS <1 <1 <1 Notes: 8/17/2017 8/17/2017 10 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841303319.461 197612.1197 31 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 El e v a t i o n ( f e e t ) 30 25 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-9 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-10 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Light brown fine to coarse sand with silt and gravel (medium dense, moist) (fill) Brown silty fine to medium sand (medium dense, moist) Brown-gray silt with trace sand (medium stiff, moist) Gray fine to medium sand with silt (medium dense, wet) Gray-brown silt with sand (medium stiff, wet) Peat with wood debris Brown silt with trace sand (medium stiff, wet) GEI-10-2.5-3 CA GEI-10-5.5-6 CA 36 42 30 SP-SM SM ML SP-SM ML Peat ML Groundwater observed at approximately 5½ feet below ground surface during drilling Groundwater sample GEI-10-081717 collected NS NS NS NS <1 <1 <1 <1 Notes: 8/17/2017 8/17/2017 15 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841303408.982 197763.8651 31 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 El e v a t i o n ( f e e t ) 30 25 20 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-10 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-11 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Brown gravel with fine to coarse sand (medium dense, moist) (fill) Brown fine to coarse sand with gravel medium dense, moist) (fill) Brown-gray fine to coarse sand with silt (medium dense, moist) (fill) Brown-gray silty fine to medium sand with occasional gravel (medium dense, moist) (fill) Peat Gray fine to medium silty sand (medium dense, wet to moist) Gray silt with sand (medium stiff, wet) Gray silty fine to medium sand (medium dense, wet) Peat Gray fine to coarse sand with trace silt (medium dense, wet) GEI-11-5.5-6 CA GEI-11-15.5-16 CA 60 34 52 60 GP SP SP-SM SM PEAT SM ML SM PEAT SP Air knife to 5 feet Groundwater observed at approximately 18 feet below ground surface during drilling Groundwater sample GEI-11-090817 collected NS NS NS NS NS NS NS <1 <1 <1 <1 <1 <1 <1 Notes: 9/8/2017 9/8/2017 25 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841302936.454 196930.6703 43 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 20 25 El e v a t i o n ( f e e t ) 30 25 20 15 10 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-11 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-12 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Brown gravel with fine to coarse sand (medium dense, moist)(fill) Brown fine to coarse sand with gravel (medium dense,moist) (fill) Gray fine to coarse sand with silt and occasional gravel(medium dense, moist) (fill) Gray silt with trace sand (medium stiff, moist) Gray fine to coarse sand with silt (medium dense, moist) Brown-gray silt with sand (medium stiff, moist) Gray fine to medium sand with silt (medium dense, wet) GEI-13-5-5.5 CA GEI-13-17.5-18 CA 60 56 48 GP SP SP-SM ML SP-SM ML SP-SM Air knife to 5 feet Groundwater observed at approximately 17½ feet below ground surface during drilling NS NS NS NS NS <1 <1 <1 <1 <1 Notes: 9/8/2017 9/8/2017 20 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841302904.094 196903.4455 42 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 20 El e v a t i o n ( f e e t ) 40 35 30 25 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-12 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-13 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) Brown fine to coarse gravel with sand (medium dense, moist)(fill) Brown fine to coarse sand with gravel (medium dense, moist)(fill) Brown-gray silty fine to coarse sand (medium dense, moist)(fill) Brown fine to coarse sand with silt and occasional gravel (medium dense, moist)(fill) Brown-gray silty fine to medium sand (medium dense, moist)(fill) Gray fine to medium sand with trace silt (mediumdense, moist)(fill) Gray silty fine to medium sand (medium dense, moist) Gray fine to medium sand with trace silt (medium dense, moist) Gray silty fine to medium sand (medium dense, moist) Gray fine to medium sand with trace silt (medium dense, wet) Brown silt with sand (medium stiff, wet) GEI-13-5-5.5 CA GEI-13-15-15.5 CA 36 56 60 GP SP SM SP-SM SM SP SM SP SM SP ML Air knife to 5 feet Groundwater observed at approximately 15 feet below ground surface during drilling Groundwater sample GEI-13-090817 collected NS NS NS NS NS NS <1 <1 <1 <1 <1 <1 Notes: 9/8/2017 9/8/2017 20 CMD SJB Cascade Drilling Direct Push Geoprobe 6600Drilling EquipmentPneumatic WGS841302880.277 196879.851 41 NAVD88 Easting (X) Northing (Y) Surface Elevation (ft) Vertical Datum Drilled Start End Total Depth (ft) Logged By Checked By Hammer Data System Datum Driller Drilling Method See "Remarks" section for groundwater observed Note: See Figure A-1 for explanation of symbols. Coordinates Data Source: Horizontal approximated based on , Vertical approximated based on Da t e : 9 / 2 9 / 1 7 P a t h : \ \ G E O E N G I N E E R S . C O M \ W A N \ P R O J E C T S \ 0 \ 0 1 8 0 3 4 9 \ G I N T \ 0 1 8 0 3 4 9 0 0 . G P J D B L i b r a r y / L i b r a r y : 3 2 7 5 0 0 5 0 1 _ L I B R A R Y . G L B / G E I 8 _ E N V I R O N M E N T A L _ S T A N D A R D _ N O _ G W FIELD DATA MATERIAL DESCRIPTION Sa m p l e N a m e Te s t i n g Re c o v e r e d ( i n ) In t e r v a l Bl o w s / f o o t Co l l e c t e d S a m p l e De p t h ( f e e t ) 0 5 10 15 20 El e v a t i o n ( f e e t ) 40 35 30 25 Gr a p h i c L o g Gr o u p Cl a s s i f i c a t i o n Sheet 1 of 1Project Number: Project Location: Project: Renton, Washington 0180-349-00 Log of Boring GEI-13 I-405 Renton to Bellevue Express Toll Lanes Hazardous Materials Investigation Figure A-14 REMARKS Sh e e n He a d s p a c e Va p o r ( p p m ) APPENDIX B Laboratory Analytical Reports and Comprehensive Data Tables January 12, 2018 | Page B-1 File No. 0180-349-00 APPENDIX B CHEMICAL ANALYTICAL DATA Analytical Methods Chain-of-custody procedures were followed during the transport of the soil and groundwater samples to the analytical laboratory. The samples were held in cold storage pending extraction and/or analysis. The analytical results, analytical methods reference and laboratory quality control (QC) records are included in this appendix. The analytical results are also summarized in the text and tables of this report. Analytical Data Review The laboratory maintains an internal quality assurance program as documented in its laboratory quality assurance manual. The laboratory uses a combination of blanks, surrogate recoveries, duplicates, matrix spike recoveries, matrix spike duplicate recoveries, blank spike recoveries and blank spike duplicate recoveries to evaluate the validity of the analytical results. The laboratory also uses data quality goals for individual chemicals or groups of chemicals based on the long-term performance of the test methods. The data quality goals were included in the laboratory reports. The laboratory compared each group of samples with the existing data quality goals and noted any exceptions in the laboratory report. Data quality exceptions documented by the accredited laboratory were reviewed by GeoEngineers and are addressed in the Data Validation Report included as part of this appendix. Analytical Data Review Summary It is our opinion that the laboratory data is of acceptable quality for the intended use in this report. Please refer to the Data Validation Report for a detailed review of the analytical data. Data Validation Report 8410 154th Avenue NE, Redmond, Washington 98052, Telephone: 425.861.6086, Fax: 425.861.6050 www.geoengineers.com Project: WSDOT – I-405 Renton to Bellevue Express Toll Lanes August and September 2017 Samples GEI File No: 00180-349-00 Date: September 28, 2017 This report documents the results of a United States Environmental Protection Agency (USEPA)-defined Stage 2A data validation (USEPA Document 540-R-08-005; USEPA, 2009) of analytical data from the analyses of soil and groundwater samples collected as part of the August and September 2017 sampling events, and the associated laboratory and field quality control (QC) samples. The samples were obtained from (or near) Sites A and B of the Interstate 405 (I-405) Renton to Bellevue Express Toll Lanes project located in Renton, Washington. OBJECTIVE AND QUALITY CONTROL ELEMENTS GeoEngineers, Inc. (GeoEngineers) completed the data validation consistent with the USEPA Contract Laboratory Program National Functional Guidelines for Superfun d Organic Methods Data Review (USEPA, 2016a) and Inorganic Superfund Data Review (USEPA, 2016b) (National Functional Guidelines) to determine if the laboratory analytical results meet the project objectives and are usable for their intended purpose. Data usability was assessed by determining if: ■ The samples were analyzed using well-defined and acceptable methods that provide reporting limits below applicable regulatory criteria; ■ The precision and accuracy of the data are well-defined and sufficient to provide defensible data; and ■ The quality assurance/quality control (QA/QC) procedures utilized by the laboratory meet acceptable industry practices and standards. In accordance with the Phase II Environmental Site Assessment Quality Assurance Project Plan (QAPP), (GeoEngineers, 2017), the data validation included review of the following QC elements: ■ Data Package Completeness ■ Chain-of-Custody Documentation ■ Holding Times and Sample Preservation ■ Surrogate Recoveries ■ Method and Trip Blanks ■ Matrix Spikes/Matrix Spike Duplicates ■ Laboratory Control Samples/Laboratory Control Sample Duplicates ■ Laboratory/Field Duplicates ■ Miscellaneous Page 2 File No. 00180-349-00 VALIDATED SAMPLE DELIVERY GROUPS This data validation included review of the sample delivery groups (SDGs) listed below in Table 1. TABLE 1: SUMMARY OF VALIDATED SAMPLE DELIVERY GROUPS Laboratory SDG Samples Validated 1708-237 GEI-1-3.5-4, Dup-1, GEI-1-17-17.5, GEI-2-3.5-4, GEI-2-15-15.5, GEI-3-1-1.5, GEI-3- 11.5-12, GEI-3-15-15.5, GEI-4-2-2.5, GEI-4-10.5-11, GEI-5-1.5-2, GEI-5-12.5-13, GEI-6-1.5-2, GEI-6-6-6.5, GEI-7-2-2.5, GEI-7-5.5-6, GEI-8-0-0.5, GEI-8-6.25-6.75, GEI-9-2.5-3, GEI-9-5.5-6, GEI-10-2.5-3, GEI-10-5.5-6 1708-238 GEI-2-081617, Dup-2, GEI-3-081617, GEI-4-081617, GEI-5-081717, GEI-6-081717, GEI-10-081717, Trip Blank 1709-088 GEI-11-5.5-6, GEI-11-15.5-16, GEI-11-090817, GEI-12-5-5.5, GEI-12-17.5-18, GEI- 13-5-5.5, GEI-13-15-15.5, GEI-13-090817 CHEMICAL ANALYSIS PERFORMED OnSite Environmental, Inc. (OnSite), located in Redmond, Washington, performed laboratory analysis on the soil and groundwater samples using one or more of the following methods: ■ Petroleum Hydrocarbons (NWTPH-Dx) by Method NWTPH-Dx; ■ Gasoline-range Hydrocarbons (NWTPH-Gx) by Method NWTPH-Gx; ■ Volatile Organic Compounds (VOCs) by Method SW8260C; ■ Semi-volatile Organic Compounds (SVOCs) by Method SW8270D; ■ Polycyclic Aromatic Hydrocarbons (PAHs) by Method SW8270D-SIM; ■ Polychlorinated Biphenyls (PCBs) by Method SW8082A; ■ Total Metals in soil by Methods SW6010C/SW7471B; and ■ Total and Dissolved Metals in water by Methods EPA200.8/SW7470A DATA VALIDATION SUMMARY The results for each of the QC elements are summarized below. Data Package Completeness OnSite provided the required deliverables for the data validation according to the National Functional Guidelines. The laboratory followed adequate corrective action processes and the identified anomalies were discussed in the relevant laboratory case narrative. Chain-of-Custody Documentation Chain-of-custody (COC) forms were provided with the laboratory analytical reports. The COCs were accurate and complete when submitted to the laboratory, with the following exceptions: Page 3 File No. 00180-349-00 SDG 1709-088: The laboratory noted that no sample depths were listed on the COC for Samples GEI-11-5.5-6, GEI-11-15.5-16, GEI-12-5-5.5, GEI-12-17.5-18, GEI-13-5-5.5, and GEI-13-15-15.5. The sample depths were provided by GeoEngineers and added to the COC by the laboratory. The laboratory noted that for Sample GEI-13-15-15.5 the sample ID listed on the sample vial label was GEI-13-090817 for one sample vial. The laboratory logged the sample vial as Sample GEI-13-15-15.5. The laboratory noted that the field blank sample listed on the COC was received empty. The requested analysis listed on the COC was canceled for this sample. Holding Times and Sample Preservation The sample holding time is defined as the time that elapses between sample collection and sample analysis. Maximum holding time criteria exist for each analysis to help ensure that the analyte concentrations found at the time of analysis reflect the concentration present at the time of sample collection. Established holding times were met for each analysis. The sample coolers arrived at the laboratory within the appropriate temperatures of between two and six degrees Celsius. Surrogate Recoveries A surrogate compound is a compound that is chemically similar to the organic analytes of interest, but unlikely to be found in an environmental sample. Surrogates are used for organic analyses and are added to the samples, standards, and blanks to serve as an accuracy and specificity check of each analysis. The surrogates are added to the samples at a known concentration and percent recoveries are calculated following analysis. The surrogate percent recoveries for field samples were within the laboratory control limits, with the following exceptions: SDG 1708-237: (NWTPH-Dx) The percent recoveries for surrogate o-Terphenyl were not recoverable in Samples GEI-3-11.5-12 and GEI-4-10.5-11, because of sample dilution (50X and 10X, respectively). The surrogates are added to the sample when it is extracted. If the sample is diluted 10X or more, recovery of the surrogates is often not possible because it is also diluted below the linear calibration range of the instrument. No action was required for these outliers. Method and Trip Blanks Method Blanks Method blanks are analyzed to ensure that laboratory procedures and reagents do not introduce measurable concentrations of the analytes of interest. A method blank was analyzed with each batch of samples, at a frequency of 1 per 20 samples. For each sample batch, method blanks for the applicable methods were analyzed at the required frequency. None of the analytes of interest were detected in the method blanks. Trip Blanks Trip blanks are analyzed to provide an indication as to whether volatile compounds have cross-contaminated other like samples within the transportation process to the laboratory. None of the analytes of interest were detected in the trip blank. Page 4 File No. 00180-349-00 Matrix Spikes/Matrix Spike Duplicates Since the actual analyte concentration in an environmental sample is not known, the accuracy of a particular analysis is usually inferred by performing a matrix spike (MS) analysis on one sample from the associated batch, known as the parent sample. One aliquot of the sample is analyzed in the normal manner and then a second aliquot of the sample is spiked with a known amount of analyte concentration and analyzed. From these analyses, a percent recovery is calculated. Matrix spike duplicate (MSD) analyses are generally performed for organic analyses as a precision check and analyzed in the same sequence as a matrix spike. Using the result values from the MS and MSD, the relative percent difference (RPD) is calculated. The percent recovery control limits for MS and MSD analyses are specified in the laboratory documents, as are the RPD control limits for MS/MSD sample sets. One MS/MSD analysis should be performed for every analytical batch or every 20 field samples, whichever is more frequent. The frequency requirements were met for each analysis and the percent recovery and RPD values were within the proper control limits, with the following exception: SDG 1708-238: (SVOCs/PAHs) The laboratory performed an MS/MSD sample set with QC outliers; however, it was performed on a sample from a different SDG and is not associated with GeoEngineers’ collected field samples; therefore, no action was required. Laboratory Control Samples/Laboratory Control Sample Duplicates A laboratory control sample (LCS) is a blank sample that is spiked with a known amount of analyte and then analyzed. An LCS is similar to an MS, but without the possibility of matrix interference. Given that matrix interference is not an issue, the LCS/LCSD control limits for accuracy and precision are usually more rigorous than for MS/MSD analyses. Additionally, data qualification based on LCS/LCSD analyses would apply to all samples in the associated batch, instead of just the parent sample. The percent recovery control limits for LCS and LCSD analyses are specified in the laboratory documents, as are the RPD control limits for LCS/LCSD sample sets. One LCS/LCSD analysis should be performed for every analytical batch or every 20 field samples, whichever is more frequent. The frequency requirements were met for each analysis and the percent recovery and RPD values were within the proper control limits. Laboratory Duplicates Internal laboratory duplicate analyses are performed to monitor the precision of the analyses. Two separate aliquots of a sample are analyzed as distinct samples in the laboratory and the RPD between the two results is calculated. Duplicate analyses should be performed once per analytical batch. If one or more of the samples used has a concentration less than five times the reporting limit for that sample, the absolute difference is used instead of the RPD. The RPD control limits are specified in the laboratory documents. Laboratory duplicates were analyzed at the proper frequency and the specified acceptance criteria were met. Field Duplicates In order to assess precision, a field duplicate sample was collected and analyzed along with the reviewed sample batches. The duplicate sample was analyzed for the same parameters as the associated parent sample. Precision is determined by calculating the RPD of sample concentrations between each pair of Page 5 File No. 00180-349-00 samples. If one or more of the sample analytes has a concentration less than five times the reporting limit for that sample, then the absolute difference is used instead of the RPD. The RPD control limit for water samples is 35 percent. The RPD control limit for sediment samples is 50 percent. SDG 1708-237: One field duplicate sample pair, GEI-1-3.5-4 and Dup-1, was submitted with this SDG. The precision criteria for the target analytes were met for this sample pair. SDG 1708-238: One field duplicate sample pair, GEI-2-081617 and Dup-2, was submitted with this SDG. The precision criteria for the target analytes were met for this sample pair, with the exception of benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, and chrysene. The positive results and reporting limits for these target analytes were qualified as estimated (J and UJ, accordingly) in these samples. Miscellaneous SDG 1708-237: (NWTPH-Dx) The positive results for diesel-range hydrocarbons in Samples GEI-4-10.5-11, GEI-5-12.5-13, GEI-6-1.5-2, GEI-8-0-0.5, and GEI-10-2.5-3 may be influenced by the relative concentration of lube oil-range hydrocarbons in the samples. For this reason, the positive results for diesel-range hydrocarbons were qualified as estimated (J) in these samples, in order to signify a potential high bias. OVERALL ASSESSMENT As was determined by this data validation, the laboratory followed the specified analytical methods. Accuracy was acceptable, as demonstrated by the surrogate, LCS/LCSD, and MS/MSD percent recovery values, with the exceptions noted above. Precision was acceptable, as demonstrated by the LCS/LCSD, MS/MSD, and laboratory/field duplicate RPD values, with the exceptions noted above. The data are acceptable for the intended use, with the following qualifications listed below in Table 2. TABLE 2: SUMMARY OF QUALIFIED SAMPLES Sample ID Analyte Qualifier Reason GEI-2-081617 Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Chrysene J J J J Field Duplicate Precision Field Duplicate Precision Field Duplicate Precision Field Duplicate Precision Dup-2 Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Chrysene UJ UJ UJ UJ Field Duplicate Precision Field Duplicate Precision Field Duplicate Precision Field Duplicate Precision GEI-4-10.5-11 Diesel-range hydrocarbons J See Miscellaneous GEI-5-12.5-13 Diesel-range hydrocarbons J See Miscellaneous GEI-6-1.5-2 Diesel-range hydrocarbons J See Miscellaneous GEI-8-0-0.5 Diesel-range hydrocarbons J See Miscellaneous GEI-10-2.5-3 Diesel-range hydrocarbons J See Miscellaneous Page 6 File No. 00180-349-00 REFERENCES U.S. Environmental Protection Agency (USEPA). “Guidance for Labeling Externally Validated Laboratory Analytical Data for Superfund Use,” EPA-540-R-08-005. January 2009. U.S. Environmental Protection Agency (USEPA), (2016a). “Contract Laboratory Program National Functional Guidelines for Superfund Organic Methods Data Review,” EPA-540-R-2016-002. September 2016. U.S. Environmental Protection Agency (USEPA), (2016b). “Contract Laboratory Program National Functional Guidelines for Inorganic Superfund Methods Data Review,” EPA-540-R-2016-001. September 2016. GeoEngineers, Inc. “Phase II Environmental Site Assessment Quality Assurance Project Plan, I-405 Renton to Bellevue Express Toll Lanes Project, Sites A and B,” prepared for Washington State Department of Transportation. August 11, 2017. . WSDOT - I405 Bellevue to Renton, Soil Data (Validated) GEI-1-3.5-4 DUP-1 GEI-1-17-17.5 GEI-2-3.5-4 GEI-2-15-15.5 GEI-3-1-1.5 GEI-3-11.5-12 GEI-3-15-15.5 GEI-4-2-2.5 GEI-4-10.5-11 GEI-5-1.5-2 GEI-5-12.5-13 GEI-6-1.5-2 GEI-6-6-6.5 GEI-7-2-2.5 GEI-7-5.5-6 GEI-8-0-0.5 GEI-8-6.25-6.75 GEI-9-2.5-3 GEI-9-5.5-6 GEI-10-2.5-3 GEI-10-5.5-6 GEI-11-5.5-6 GEI-11-15.5-16 GEI-12-5-5.5 GEI-12-17.5-18 GEI-13-5-5.5 GEI-13-15-15.5 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 N FD N N N N N N N N N N N N N N N N N N N N N N N N N N 3.5 3.5 17 3.5 15 1 11.5 15 2 10.5 1.5 12.5 1.5 6 2 5.5 0 6.25 2.5 5.5 2.5 5.5 5.5 15.5 5 17.5 5 15 4 4 17.5 4 15.5 1.5 12 15.5 2.5 11 2 13 2 6.5 2.5 6 0.5 6.75 3 6 3 6 6 16 5.5 18 5.5 15.5 ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft Method Analyte Units NWTPH-GX Gasoline-range hydrocarbons mg/Kg 7.2 U 6.8 U 8.2 U 6.1 U 8.6 U 5.8 U 11 U 8.8 U 5.9 U 7.4 U 5.5 U 9.1 U 7.2 U 8.9 U 9.0 U 7.0 U 7.0 U 7.1 U 9.7 U 7.5 U 7.6 U 8.8 U 7.2 U 7.2 U 7.5 U 5.5 U 6.8 U 6.3 U Diesel-range hydrocarbons mg/Kg 27 U 27 U 32 U 26 U 34 U 26 U 1300 U 34 U 26 U 1,100 J 26 U 39 J 37 J 32 U 39 30 U 54 J 33 U 30 U 31 U 31 J 32 U 29 U 31 U 29 U 28 U 29 U 31 U Lube Oil-range Hydrocarbons mg/Kg 54 U 54 U 64 U 53 U 69 U 53 U 18,000 89 52 U 4,600 52 U 110 220 64 U 65 U 61 U 300 65 U 59 U 63 U 74 65 U 63 62 U 59 U 55 U 87 61 U Arsenic mg/Kg 11 U 11 U 13 U 11 U 14 U 11 U 10 U 14 U 10 U 11 U 10 U 14 U 12 U 13 U 13 U 12 U 10 U 13 U 12 U 13 U 15 13 U 11 U 12 U 12 U 11 U 12 U 12 U Cadmium mg/Kg 0.54 U 0.54 U 0.64 U 0.53 U 0.69 U 0.53 U 0.52 U 0.68 U 0.52 U 0.55 U 0.52 U 0.68 U 0.59 U 0.64 U 0.65 U 0.61 U 0.51 U 0.65 U 0.59 U 0.63 U 0.57 U 0.64 U 0.57 U 0.62 U 0.59 U 0.55 U 0.59 U 0.61 U Chromium mg/Kg 43 46 47 23 49 24 20 42 23 22 23 50 40 44 42 39 23 42 41 38 47 38 43 31 43 29 47 29 Copper mg/Kg 21 22 19 23 22 24 16 17 23 34 21 22 17 18 27 16 21 15 22 15 30 13 22 11 20 8.6 28 11 Lead mg/Kg 5.4 U 5.4 U 6.4 U 5.3 U 6.9 U 5.3 U 5.4 6.8 U 5.2 U 13 5.2 U 6.8 U 5.9 U 6.4 U 14 6.1 U 19 6.5 U 5.9 U 6.3 U 23 6.4 U 5.7 U 6.2 U 5.9 U 5.5 U 5.9 U 6.1 U Mercury mg/Kg 0.27 U 0.27 U 0.32 U 0.26 U 0.34 U 0.26 U 0.26 U 0.34 U 0.26 U 0.27 U 0.26 U 0.34 U 0.29 U 0.32 U 0.33 U 0.30 U 0.26 U 0.33 U 0.29 U 0.31 U 0.28 U 0.32 U 0.29 U 0.31 U 0.29 U 0.27 U 0.29 U 0.31 U PCB-Aroclor 1016 mg/Kg 0.054 U 0.054 U 0.064 U 0.053 U 0.069 U 0.053 U 0.052 U 0.068 U 0.052 U 0.055 U 0.052 U 0.068 U 0.059 U 0.064 U 0.065 U 0.061 U 0.051 U 0.065 U 0.059 U 0.063 U 0.057 U 0.064 U 0.057 U 0.062 U 0.059 U 0.055 U 0.059 U 0.061 U PCB-Aroclor 1221 mg/Kg 0.054 U 0.054 U 0.064 U 0.053 U 0.069 U 0.053 U 0.052 U 0.068 U 0.052 U 0.055 U 0.052 U 0.068 U 0.059 U 0.064 U 0.065 U 0.061 U 0.051 U 0.065 U 0.059 U 0.063 U 0.057 U 0.064 U 0.057 U 0.062 U 0.059 U 0.055 U 0.059 U 0.061 U PCB-Aroclor 1232 mg/Kg 0.054 U 0.054 U 0.064 U 0.053 U 0.069 U 0.053 U 0.052 U 0.068 U 0.052 U 0.055 U 0.052 U 0.068 U 0.059 U 0.064 U 0.065 U 0.061 U 0.051 U 0.065 U 0.059 U 0.063 U 0.057 U 0.064 U 0.057 U 0.062 U 0.059 U 0.055 U 0.059 U 0.061 U PCB-Aroclor 1242 mg/Kg 0.054 U 0.054 U 0.064 U 0.053 U 0.069 U 0.053 U 0.052 U 0.068 U 0.052 U 0.055 U 0.052 U 0.068 U 0.059 U 0.064 U 0.065 U 0.061 U 0.051 U 0.065 U 0.059 U 0.063 U 0.057 U 0.064 U 0.057 U 0.062 U 0.059 U 0.055 U 0.059 U 0.061 U PCB-Aroclor 1248 mg/Kg 0.054 U 0.054 U 0.064 U 0.053 U 0.069 U 0.053 U 0.052 U 0.068 U 0.052 U 0.055 U 0.052 U 0.068 U 0.059 U 0.064 U 0.065 U 0.061 U 0.051 U 0.065 U 0.059 U 0.063 U 0.057 U 0.064 U 0.057 U 0.062 U 0.059 U 0.055 U 0.059 U 0.061 U PCB-Aroclor 1254 mg/Kg 0.054 U 0.054 U 0.064 U 0.053 U 0.069 U 0.053 U 0.052 U 0.068 U 0.052 U 0.055 U 0.052 U 0.068 U 0.059 U 0.064 U 0.065 U 0.061 U 0.051 U 0.065 U 0.059 U 0.063 U 0.057 U 0.064 U 0.057 U 0.062 U 0.059 U 0.055 U 0.059 U 0.061 U PCB-Aroclor 1260 mg/Kg 0.054 U 0.054 U 0.064 U 0.053 U 0.069 U 0.053 U 0.052 U 0.068 U 0.052 U 0.055 U 0.052 U 0.068 U 0.059 U 0.064 U 0.065 U 0.061 U 0.051 U 0.065 U 0.059 U 0.063 U 0.057 U 0.064 U 0.057 U 0.062 U 0.059 U 0.055 U 0.059 U 0.061 U 1,1,1,2-Tetrachloroethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,1,1-Trichloroethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,1,2,2-Tetrachloroethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,1,2-Trichloroethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,1-Dichloroethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,1-Dichloroethene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,1-Dichloropropene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,2,3-Trichlorobenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,2,3-Trichloropropane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,2,4-Trichlorobenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,2,4-Trimethylbenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,2-Dibromo-3-Chloropropane mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.28 U 0.0070 U 0.0059 U 0.29 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U 1,2-Dibromoethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,2-Dichlorobenzene (o-Dichlorobenzene)mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,2-Dichloroethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,2-Dichloropropane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,3,5-Trimethylbenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,3-Dichlorobenzene (m-Dichlorobenzene)mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,3-Dichloropropane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 1,4-Dichlorobenzene (p-Dichlorobenzene)mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 2,2-Dichloropropane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 2-Butanone (MEK)mg/Kg 0.0081 U 0.0059 U 0.038 0.0066 U 0.012 0.0063 U 0.0091 U 0.025 0.0059 U 0.011 0.0069 U 0.013 0.0061 U 0.011 0.033 0.016 0.0065 U 0.0081 0.011 U 0.0090 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U 2-Chloroethyl vinyl ether mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.010 U 0.0073 U 0.0097 U 0.0084 U 0.0077 U 0.0079 U 2-Chlorotoluene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 2-Hexanone mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U 4-Chlorotoluene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U 4-Methyl-2-Pentanone (Methyl isobutyl ketone)mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U Acetone mg/Kg 0.016 U 0.012 U 0.17 0.013 U 0.059 0.013 U 0.045 0.12 0.012 U 0.081 0.014 U 0.063 0.012 U 0.062 0.15 0.084 0.013 U 0.034 0.021 U 0.046 0.020 0.020 0.028 0.041 0.013 0.020 0.0058 U 0.042 Benzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Bromobenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Bromochloromethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Bromodichloromethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Bromoform (Tribromomethane)mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U Bromomethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Carbon Disulfide mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0033 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0027 U 0.0019 U 0.0025 U 0.0021 U 0.0020 U 0.0029 Carbon Tetrachloride mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Chlorobenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Chloroethane mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U Chloroform mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Chloromethane mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U cis-1,2-Dichloroethene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U cis-1,3-Dichloropropene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Dibromochloromethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Dibromomethane mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Dichlorodifluoromethane (CFC-12)mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Ethylbenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Hexachlorobutadiene mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.28 U 0.0070 U 0.0059 U 0.29 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U Isopropylbenzene (Cumene)mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Methyl Iodide (Iodomethane)mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.010 U 0.0070 U 0.0093 U 0.0080 U 0.0074 U 0.0075 U Methyl t-butyl ether mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Methylene Chloride mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.010 U 0.0072 U 0.0096 U 0.0083 U 0.0076 U 0.0078 U Naphthalene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U n-Butylbenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U n-Propylbenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U p-Isopropyltoluene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Sec-Butylbenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Styrene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Tert-Butylbenzene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.056 U 0.0014 U 0.0012 U 0.059 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Tetrachloroethene mg/Kg 0.0032 U 0.0035 0.0030 U 0.0026 U 0.0028 U 0.0025 U 0.0036 U 0.0028 U 0.0024 U 0.0037 U 0.0028 U 0.0023 U 0.0025 U 0.0026 U 0.0038 U 0.0021 U 0.0026 U 0.0026 U 0.0042 U 0.0024 U 0.0021 U 0.0025 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Toluene mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U Trans-1,2-Dichloroethene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Trans-1,3-Dichloropropene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Trichloroethene mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Trichlorofluoromethane (CFC-11)mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Vinyl Acetate mg/Kg 0.0081 U 0.0059 U 0.0075 U 0.0066 U 0.0069 U 0.0063 U 0.0091 U 0.0070 U 0.0059 U 0.0092 U 0.0069 U 0.0058 U 0.0061 U 0.0066 U 0.0096 U 0.0053 U 0.0065 U 0.0064 U 0.011 U 0.0061 U 0.0052 U 0.0061 U 0.0078 U 0.0055 U 0.0073 U 0.0063 U 0.0058 U 0.0059 U Vinyl Chloride mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Xylene, m-,p-mg/Kg 0.0032 U 0.0024 U 0.0030 U 0.0026 U 0.0028 U 0.0025 U 0.0036 U 0.0028 U 0.0024 U 0.0037 U 0.0028 U 0.0023 U 0.0025 U 0.0026 U 0.0038 U 0.0021 U 0.0026 U 0.0026 U 0.0042 U 0.0024 U 0.0021 U 0.0025 U 0.0031 U 0.0022 U 0.0029 U 0.0025 U 0.0023 U 0.0024 U Xylene, o-mg/Kg 0.0016 U 0.0012 U 0.0015 U 0.0013 U 0.0014 U 0.0013 U 0.0018 U 0.0014 U 0.0012 U 0.0018 U 0.0014 U 0.0012 U 0.0012 U 0.0013 U 0.0019 U 0.0011 U 0.0013 U 0.0013 U 0.0021 U 0.0012 U 0.0010 U 0.0012 U 0.0016 U 0.0011 U 0.0015 U 0.0013 U 0.0012 U 0.0012 U Depth Unit GEI-1 GEI-2 GEI-3 GEI-4Location ID Sample ID Sample Date Sample Type Start Depth GEI-6 GEI-7 GEI-8 GEI-9 GEI-10 End Depth VOCs GEI-11 GEI-12 GEI-13 NWTPH-DX Metals PCBs GEI-5 Page 1 of 2 GEI-1-3.5-4 DUP-1 GEI-1-17-17.5 GEI-2-3.5-4 GEI-2-15-15.5 GEI-3-1-1.5 GEI-3-11.5-12 GEI-3-15-15.5 GEI-4-2-2.5 GEI-4-10.5-11 GEI-5-1.5-2 GEI-5-12.5-13 GEI-6-1.5-2 GEI-6-6-6.5 GEI-7-2-2.5 GEI-7-5.5-6 GEI-8-0-0.5 GEI-8-6.25-6.75 GEI-9-2.5-3 GEI-9-5.5-6 GEI-10-2.5-3 GEI-10-5.5-6 GEI-11-5.5-6 GEI-11-15.5-16 GEI-12-5-5.5 GEI-12-17.5-18 GEI-13-5-5.5 GEI-13-15-15.5 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 8/17/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 9/8/2017 N FD N N N N N N N N N N N N N N N N N N N N N N N N N N 3.5 3.5 17 3.5 15 1 11.5 15 2 10.5 1.5 12.5 1.5 6 2 5.5 0 6.25 2.5 5.5 2.5 5.5 5.5 15.5 5 17.5 5 15 4 4 17.5 4 15.5 1.5 12 15.5 2.5 11 2 13 2 6.5 2.5 6 0.5 6.75 3 6 3 6 6 16 5.5 18 5.5 15.5 ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft ft Method Analyte Units Depth Unit GEI-1 GEI-2 GEI-3 GEI-4Location ID Sample ID Sample Date Sample Type Start Depth GEI-6 GEI-7 GEI-8 GEI-9 GEI-10 End Depth GEI-11 GEI-12 GEI-13GEI-5 1,2,4-Trichlorobenzene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 1,2-Dichlorobenzene (o-Dichlorobenzene)mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 1,2-Diphenylhydrazine mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 1,3-Dichlorobenzene (m-Dichlorobenzene)mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 1,3-Dinitrobenzene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 1,4-Dichlorobenzene (p-Dichlorobenzene)mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 1,4-Dinitrobenzene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,3,4,6-Tetrachlorophenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,3,5,6-Tetrachlorophenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,3-Dichloroaniline mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,4,5-Trichlorophenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,4,6-Trichlorophenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,4-Dichlorophenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,4-Dimethylphenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,4-Dinitrophenol mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U 2,4-Dinitrotoluene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2,6-Dinitrotoluene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2-Chloronaphthalene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2-Chlorophenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2-methylphenol (o-Cresol)mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2-Nitroaniline mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 2-Nitrophenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 3 & 4 Methylphenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 3,3'-Dichlorobenzidine mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U 3-Nitroaniline mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 4,6-Dinitro-2-Methylphenol mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U 4-Bromophenyl phenyl ether mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 4-Chloro-3-Methylphenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 4-Chloroaniline mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U 4-Chlorophenyl-Phenylether mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 4-Nitroaniline mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U 4-Nitrophenol (p-Nitrophenol)mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Aniline mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Benzidine mg/Kg 0.36 U 0.36 U 0.43 U 0.35 U 0.46 U 0.35 U 26 U 2.3 U 0.35 U 18 U 0.35 U 0.45 U 0.39 U 0.43 U 0.44 U 0.41 U 0.34 U 0.43 U 0.39 U 0.42 U 0.38 U 0.43 U 0.38 U 0.41 U 0.39 U 0.37 U 0.39 U 0.41 U Benzyl Alcohol mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Bis(2-Chloroethoxy)Methane mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Bis(2-Chloroethyl)Ether mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Bis(2-chloroisopropyl) ether mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Bis(2-Ethylhexyl) Phthalate mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Bis(2-Ethylhexyl)Ester mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Butyl benzyl Phthalate mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Carbazole mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.062 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Dibenzofuran mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Dibutyl Phthalate mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Diethyl Phthalate mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Dimethyl Phthalate mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Di-N-Octyl Phthalate mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Hexachlorobenzene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Hexachlorobutadiene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Hexachlorocyclopentadiene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Hexachloroethane mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Isophorone mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Nitrobenzene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U N-Nitrosodimethylamine mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U N-Nitrosodi-n-propylamine mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U N-Nitrosodiphenylamine (as diphenylamine)mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U o-Dintrobenzene mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Pentachlorophenol mg/Kg 0.18 U 0.18 U 0.21 U 0.18 U 0.23 U 0.18 U 13 U 1.1 U 0.17 U 9.2 U 0.17 U 0.23 U 0.20 U 0.21 U 0.22 U 0.20 U 0.17 U 0.22 U 0.20 U 0.21 U 0.19 U 0.21 U 0.19 U 0.21 U 0.20 U 0.18 U 0.20 U 0.20 U Phenol mg/Kg 0.036 U 0.036 U 0.043 U 0.035 U 0.046 U 0.035 U 2.6 U 0.23 U 0.035 U 1.8 U 0.035 U 0.045 U 0.039 U 0.043 U 0.044 U 0.041 U 0.034 U 0.043 U 0.039 U 0.042 U 0.038 U 0.043 U 0.038 U 0.041 U 0.039 U 0.037 U 0.039 U 0.041 U Pyridine mg/Kg 0.36 U 0.36 U 0.43 U 0.35 U 0.46 U 0.35 U 26 U 2.3 U 0.35 U 18 U 0.35 U 0.45 U 0.39 U 0.43 U 0.44 U 0.41 U 0.34 U 0.43 U 0.39 U 0.42 U 0.38 U 0.43 U 0.38 U 0.41 U 0.39 U 0.37 U 0.39 U 0.41 U 1-Methylnaphthalene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.10 U 0.0097 0.0069 U 0.85 0.013 0.0090 U 0.0084 0.0086 U 0.0087 U 0.0081 U 0.072 0.0087 U 0.0079 U 0.0084 U 0.023 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U 2-Methylnaphthalene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.10 U 0.021 0.0069 U 1.9 0.015 0.0090 U 0.011 0.0086 U 0.0087 U 0.0081 U 0.077 0.0087 U 0.0079 U 0.0084 U 0.027 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Acenaphthene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.10 U 0.0091 U 0.0069 U 0.33 0.020 0.0090 U 0.025 0.0086 U 0.0094 0.0081 U 0.12 0.0087 U 0.0079 U 0.0084 U 0.041 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Acenaphthylene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.10 U 0.019 0.0069 U 2.1 0.0070 U 0.0090 U 0.072 0.0086 U 0.0087 U 0.0089 0.040 0.0087 U 0.0079 U 0.0084 U 0.076 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Anthracene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.19 0.040 0.0069 U 5.3 0.030 0.0090 U 0.13 0.0086 U 0.027 0.13 0.21 0.0087 U 0.0079 U 0.0084 U 0.14 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Benzo(a)anthracene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.63 0.13 0.0069 U 2.6 0.076 0.0090 U 0.44 0.0086 U 0.065 0.041 0.59 0.0087 U 0.0079 U 0.0084 U 0.50 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0091 0.0082 U Benzo(a)pyrene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 1.2 0.20 0.0069 U 5.5 0.098 0.0090 U 0.45 0.0086 U 0.093 0.038 0.80 0.0087 U 0.0079 U 0.0084 U 0.85 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.011 0.0082 U Benzo(b)fluoranthene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 1.2 0.25 0.0069 U 5.5 0.080 0.0090 U 0.52 0.0086 U 0.11 0.047 0.87 0.0087 U 0.0079 U 0.0084 U 1.1 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.011 0.0082 U Benzo(g,h,i)perylene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 1.0 0.22 0.0069 U 5.8 0.069 0.0090 U 0.27 0.0086 U 0.087 0.020 0.64 0.0087 U 0.0079 U 0.0084 U 0.69 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0084 0.0082 U Benzo(j,k)fluoranthene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.26 0.072 0.0069 U 1.5 0.024 0.0090 U 0.21 0.0086 U 0.038 0.016 0.22 0.0087 U 0.0079 U 0.0084 U 0.36 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Chrysene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 1.2 0.17 0.0069 U 3.8 0.10 0.0090 U 0.52 0.0086 U 0.087 0.056 0.79 0.0087 U 0.0079 U 0.0084 U 0.62 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.013 0.0082 U Dibenzo(a,h)anthracene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.18 0.046 0.0069 U 1.1 0.016 0.0090 U 0.078 0.0086 U 0.018 0.0081 U 0.14 0.0087 U 0.0079 U 0.0084 U 0.16 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Fluoranthene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.78 0.17 0.0069 U 4.6 0.11 0.0090 U 0.87 0.0086 U 0.13 0.073 0.97 0.0087 U 0.0079 U 0.0084 U 0.83 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.012 0.0082 U Fluorene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.10 U 0.012 0.0069 U 0.58 0.015 0.0090 U 0.041 0.0086 U 0.0099 0.0081 U 0.075 0.0087 U 0.0079 U 0.0084 U 0.037 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Indeno(1,2,3-c,d)pyrene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.82 0.19 0.0069 U 4.6 0.048 0.0090 U 0.27 0.0086 U 0.071 0.021 0.51 0.0087 U 0.0079 U 0.0084 U 0.64 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Naphthalene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.10 U 0.029 0.0069 U 4.9 0.023 0.0090 U 0.021 0.0086 U 0.0087 U 0.0081 U 0.11 0.0087 U 0.0079 U 0.0084 U 0.042 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.0078 U 0.0082 U Phenanthrene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.0070 U 0.60 0.10 0.0069 U 5.0 0.18 0.0090 U 0.36 0.0086 U 0.089 0.018 1.0 0.0087 U 0.0079 U 0.0084 U 0.29 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.020 0.0082 U Pyrene mg/Kg 0.0071 U 0.0071 U 0.0086 U 0.0070 U 0.0092 U 0.010 1.4 0.18 0.0069 U 5.5 0.22 0.0090 U 0.84 0.0086 U 0.14 0.069 1.4 0.0087 U 0.0079 U 0.0084 U 1.0 0.0086 U 0.0076 U 0.0083 U 0.0079 U 0.0073 U 0.025 0.0082 U Total cPAH TEQ (ND=0.5RL)mg/Kg 0.0054 U 0.0054 U 0.0065 U 0.0053 U 0.0069 U 0.0053 U 1.521 0.2705 0.0052 U 7.068 0.1234 0.0068 U 0.607 0.0065 U 0.1241 0.0515 1.0409 0.0066 U 0.006 U 0.0063 U 1.1322 0.0065 U 0.0057 U 0.0063 U 0.006 U 0.0055 U 0.0143 0.0062 U SVOCs PAHs Page 2 of 2 WSDOT - I405 Bellevue to Renton, Groundwater Data (Validated) GEI-3 GEI-4 GEI-5 GEI-6 GEI-10 GEI-11 GEI-13 GEI-2-081617 DUP-2 GEI-3-081617 GEI-4-081617 GEI-5-081717 GEI-6-081717 GEI-10-081717 GEI-11-090817 GEI-13-090817 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/17/2017 8/17/2017 8/17/2017 9/8/2017 9/8/2017 N FD N N N N N N N Method Analyte Units NWTPH-GX Gasoline-range hydrocarbons ug/L 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U 100 U Diesel-range hydrocarbons mg/L 0.26 U 0.26 U 0.27 U 0.26 U 0.26 U 0.27 U 0.27 U 0.29 U 0.27 U Lube Oil-range Hydrocarbons mg/L 0.42 U 0.42 U 0.43 U 0.41 U 0.42 U 0.43 U 0.44 U 0.47 U 0.43 U Arsenic ug/L 8.4 8.9 110 9.5 4.5 12 23 24 75 Cadmium ug/L 4.4 U 4.4 U 4.4 U 4.4 U 4.4 U 4.4 U 4.4 U 4.4 U 4.4 U Chromium ug/L 11 U 11 U 11 U 11 U 21 11 U 200 220 11 U Copper ug/L 11 U 11 U 11 U 11 U 11 U 11 U 100 110 11 U Lead ug/L 1.7 1.1 U 1.1 U 1.1 U 2.2 1.1 U 17 23 1.1 U Mercury ug/L 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U Arsenic ug/L 3.0 U 3.0 U 8.8 3.0 U 3.0 U 9.0 5.1 4.5 64 Cadmium ug/L 4.0 U 4.0 U 4.0 U 4.0 U 4.0 U 4.0 U 4.0 U 4.0 U 4.0 U Chromium ug/L 10 U 10 U 10 U 10 U 10 U 10 U 10 U 10 U 10 U Copper ug/L 10 U 10 U 10 U 10 U 10 U 10 U 10 U 10 U 10 U Lead ug/L 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.0 U 1.3 1.0 U Mercury ug/L 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U 0.50 U PCB-Aroclor 1016 ug/L 0.051 U 0.048 U 0.050 U 0.049 U 0.051 U 0.049 U 0.052 U 0.050 U 0.049 U PCB-Aroclor 1221 ug/L 0.051 U 0.048 U 0.050 U 0.049 U 0.051 U 0.049 U 0.052 U 0.050 U 0.049 U PCB-Aroclor 1232 ug/L 0.051 U 0.048 U 0.050 U 0.049 U 0.051 U 0.049 U 0.052 U 0.050 U 0.049 U PCB-Aroclor 1242 ug/L 0.051 U 0.048 U 0.050 U 0.049 U 0.051 U 0.049 U 0.052 U 0.050 U 0.049 U PCB-Aroclor 1248 ug/L 0.051 U 0.048 U 0.050 U 0.049 U 0.051 U 0.049 U 0.052 U 0.050 U 0.049 U PCB-Aroclor 1254 ug/L 0.051 U 0.048 U 0.050 U 0.049 U 0.051 U 0.049 U 0.052 U 0.050 U 0.049 U PCB-Aroclor 1260 ug/L 0.051 U 0.048 U 0.050 U 0.049 U 0.051 U 0.049 U 0.052 U 0.050 U 0.049 U 1,1,1,2-Tetrachloroethane ug/L 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 1,1,1-Trichloroethane ug/L 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 1,1,2,2-Tetrachloroethane ug/L 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 1,1,2-Trichloroethane ug/L 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 1,1-Dichloroethane ug/L 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 1,1-Dichloroethene ug/L 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 1,1-Dichloropropene ug/L 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 1,2,3-Trichlorobenzene ug/L 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 1,2,3-Trichloropropane ug/L 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 1,2,4-Trichlorobenzene ug/L 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 1,2,4-Trimethylbenzene ug/L 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 1,2-Dibromo-3-Chloropropane ug/L 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 1,2-Dibromoethane ug/L 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 1,2-Dichlorobenzene (o-Dichlorobenzene)ug/L 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 1,2-Dichloroethane ug/L 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 1,2-Dichloropropane ug/L 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 1,3,5-Trimethylbenzene ug/L 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 1,3-Dichlorobenzene (m-Dichlorobenzene)ug/L 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 1,3-Dichloropropane ug/L 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 1,4-Dichlorobenzene (p-Dichlorobenzene)ug/L 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 2,2-Dichloropropane ug/L 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 2-Butanone (MEK)ug/L 7.0 U 7.0 U 7.0 U 7.0 U 7.0 U 7.0 U 7.0 U 5.0 U 5.0 U 2-Chloroethyl vinyl ether ug/L 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.5 U 1.5 U 2-Chlorotoluene ug/L 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 2-Hexanone ug/L 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.0 U 2.0 U 4-Chlorotoluene ug/L 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 4-Methyl-2-Pentanone (Methyl isobutyl ketone)ug/L 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.6 U 2.0 U 2.0 U Acetone ug/L 6.4 U 6.4 U 6.4 U 6.4 U 6.4 U 6.4 U 6.4 U 7.2 5.3 Benzene ug/L 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 Bromobenzene ug/L 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 Bromochloromethane ug/L 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 Bromodichloromethane ug/L 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 Bromoform (Tribromomethane)ug/L 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 Bromomethane ug/L 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 Carbon Disulfide ug/L 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 Carbon Tetrachloride ug/L 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 Chlorobenzene ug/L 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 Chloroethane ug/L 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 Chloroform ug/L 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 Chloromethane ug/L 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 cis-1,2-Dichloroethene ug/L 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 cis-1,3-Dichloropropene ug/L 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 Dibromochloromethane ug/L 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 Dibromomethane ug/L 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 Dichlorodifluoromethane (CFC-12)ug/L 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 Ethylbenzene ug/L 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 Hexachlorobutadiene ug/L 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 Isopropylbenzene (Cumene)ug/L 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 Methyl Iodide (Iodomethane)ug/L 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.3 U 1.3 U Methyl t-butyl ether ug/L 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 Methylene Chloride ug/L 1.3 U 1.3 U 1.3 U 1.3 U 1.3 U 1.3 U 1.3 U 1.0 U 1.0 U Naphthalene ug/L 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.4 U 1.0 U 1.0 U n-Butylbenzene ug/L 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 n-Propylbenzene ug/L 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 p-Isopropyltoluene ug/L 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 Sec-Butylbenzene ug/L 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 Styrene ug/L 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 Sample Date Sample Type VOCs GEI-2 NWTPH-DX Metals (Total) Metals (Dissolved) PCBs Location ID Sample ID Page 1 of 2 GEI-3 GEI-4 GEI-5 GEI-6 GEI-10 GEI-11 GEI-13 GEI-2-081617 DUP-2 GEI-3-081617 GEI-4-081617 GEI-5-081717 GEI-6-081717 GEI-10-081717 GEI-11-090817 GEI-13-090817 8/16/2017 8/16/2017 8/16/2017 8/16/2017 8/17/2017 8/17/2017 8/17/2017 9/8/2017 9/8/2017 N FD N N N N N N N Sample Date Sample Type GEI-2Location ID Sample ID Tert-Butylbenzene ug/L 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 Tetrachloroethene ug/L 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 Toluene ug/L 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 Trans-1,2-Dichloroethene ug/L 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 Trans-1,3-Dichloropropene ug/L 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 Trichloroethene ug/L 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 Trichlorofluoromethane (CFC-11)ug/L 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 Vinyl Acetate ug/L 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 Vinyl Chloride ug/L 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 Xylene, m-,p-ug/L 0.40 U 0.40 U 0.40 U 0.40 U 0.40 U 0.40 U 0.40 U 0.40 U 0.40 U Xylene, o-ug/L 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 1,2,4-Trichlorobenzene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 1,2-Dichlorobenzene (o-Dichlorobenzene)ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 1,2-Diphenylhydrazine ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 1,3-Dichlorobenzene (m-Dichlorobenzene)ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 1,3-Dinitrobenzene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 1,4-Dichlorobenzene (p-Dichlorobenzene)ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 1,4-Dinitrobenzene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,3,4,6-Tetrachlorophenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,3,5,6-Tetrachlorophenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,3-Dichloroaniline ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,4,5-Trichlorophenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,4,6-Trichlorophenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,4-Dichlorophenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,4-Dimethylphenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,4-Dinitrophenol ug/L 5.0 U 4.8 U 5.1 U 4.9 U 4.9 U 4.9 U 5.5 U 5.1 U 5.0 U 2,4-Dinitrotoluene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2,6-Dinitrotoluene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2-Chloronaphthalene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2-Chlorophenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2-methylphenol (o-Cresol)ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2-Nitroaniline ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 2-Nitrophenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 3 & 4 Methylphenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 3,3'-Dichlorobenzidine ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 3-Nitroaniline ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 4,6-Dinitro-2-Methylphenol ug/L 5.0 U 4.8 U 5.1 U 4.9 U 4.9 U 4.9 U 5.5 U 5.1 U 5.0 U 4-Bromophenyl phenyl ether ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 4-Chloro-3-Methylphenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 4-Chloroaniline ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 4-Chlorophenyl-Phenylether ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 4-Nitroaniline ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 4-Nitrophenol (p-Nitrophenol)ug/L 5.0 U 4.8 U 5.1 U 4.9 U 4.9 U 4.9 U 5.5 U 5.1 U 5.0 U Aniline ug/L 5.0 U 4.8 U 5.1 U 4.9 U 4.9 U 4.9 U 5.5 U 5.1 U 5.0 U Benzidine ug/L 5.0 U 4.8 U 5.1 U 4.9 U 4.9 U 4.9 U 5.5 U 5.1 U 5.0 U Benzyl Alcohol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Bis(2-Chloroethoxy)Methane ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Bis(2-Chloroethyl)Ether ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Bis(2-chloroisopropyl) ether ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Bis(2-Ethylhexyl) Phthalate ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Bis(2-Ethylhexyl)Ester ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Butyl benzyl Phthalate ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Carbazole ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Dibenzofuran ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Dibutyl Phthalate ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Diethyl Phthalate ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Dimethyl Phthalate ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Di-N-Octyl Phthalate ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Hexachlorobenzene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Hexachlorobutadiene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Hexachlorocyclopentadiene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Hexachloroethane ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Isophorone ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Nitrobenzene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U N-Nitrosodimethylamine ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U N-Nitrosodi-n-propylamine ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U N-Nitrosodiphenylamine (as diphenylamine)ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U o-Dintrobenzene ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Pentachlorophenol ug/L 5.0 U 4.8 U 5.1 U 4.9 U 4.9 U 4.9 U 5.5 U 5.1 U 5.0 U Phenol ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U Pyridine ug/L 0.99 U 0.96 U 1.0 U 0.98 U 0.98 U 0.98 U 1.1 U 1.0 U 1.0 U 1-Methylnaphthalene ug/L 0.099 U 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.10 U 2-Methylnaphthalene ug/L 0.099 U 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.10 U Acenaphthene ug/L 0.13 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.29 0.19 Acenaphthylene ug/L 0.099 U 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.10 U Anthracene ug/L 0.099 U 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.10 U Benzo(a)anthracene ug/L 0.020 J 0.0096 UJ 0.010 U 0.0098 U 0.0098 U 0.0098 U 0.017 0.010 U 0.010 U Benzo(a)pyrene ug/L 0.024 J 0.0096 UJ 0.010 U 0.017 0.011 0.0098 U 0.017 0.010 U 0.010 U Benzo(b)fluoranthene ug/L 0.028 J 0.0096 UJ 0.010 U 0.017 0.011 0.0098 U 0.019 0.010 U 0.010 U Benzo(g,h,i)perylene ug/L 0.016 0.0096 U 0.010 U 0.018 0.0098 U 0.0098 U 0.011 U 0.010 U 0.010 U Benzo(j,k)fluoranthene ug/L 0.0099 U 0.0096 U 0.010 U 0.0098 U 0.0098 U 0.0098 U 0.011 U 0.010 U 0.010 U Chrysene ug/L 0.024 J 0.0096 UJ 0.010 U 0.013 0.014 0.0098 U 0.019 0.010 U 0.010 U Dibenzo(a,h)anthracene ug/L 0.0099 U 0.0096 U 0.010 U 0.0098 U 0.0098 U 0.0098 U 0.011 U 0.010 U 0.010 U Fluoranthene ug/L 0.099 U 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.10 U Fluorene ug/L 0.099 U 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.10 U Indeno(1,2,3-c,d)pyrene ug/L 0.015 0.0096 U 0.010 U 0.020 0.0098 U 0.0098 U 0.013 0.010 U 0.010 U Naphthalene ug/L 0.099 U 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.10 U Phenanthrene ug/L 0.14 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.10 U Pyrene ug/L 0.099 U 0.096 U 0.10 U 0.098 U 0.098 U 0.098 U 0.11 U 0.10 U 0.32 Total cPAH TEQ (ND=0.5RL)ug/L 0.0315 0.0072 U 0.0076 U 0.0223 0.0142 0.0074 U 0.0232 0.0076 U 0.0076 U VOCs SVOCs PAHs Page 2 of 2 APPENDIX C Investigation-Derived Waste Manifest APPENDIX D Report Limitations and Guidelines for Use January 12, 2018 | Page D-1 File No. 0180-349-00 APPENDIX D REPORT LIMITATIONS AND GUIDELINES FOR USE 2 This appendix provides information to help you manage your risks with respect to the use of this report. Read These Provisions Closely Some clients, design professionals and contractors may not recognize that the geosciences practices (geotechnical engineering, geology and environmental science) are far less exact than other engineering and natural science disciplines. This lack of understanding can create unrealistic expectations that could lead to disappointments, claims and disputes. GeoEngineers includes these explanatory “limitations” provisions in our reports to help reduce such risks. Please confer with GeoEngineers if you are unclear how these “Report Limitations and Guidelines for Use” apply to your project or site. Environmental Services Are Performed for Specific Purposes, Persons and Projects This report has been prepared for the exclusive use of WSDOT and their authorized agents. This report is not intended for use by others, and the information contained herein is not applicable to other sites. GeoEngineers structures our services to meet the specific needs of our clients. For example, an environmental site assessment or remedial action study conducted for a property owner may not fulfill the needs of a prospective purchaser of the same property. Because each environmental study is unique, each environmental report is unique, prepared solely for the specific client and project site. No one except WSDOT should rely on this report without first conferring with GeoEngineers. This report should not be applied for any purpose or project except the one originally contemplated. This Environmental Report Is Based on a Unique Set of Project-Specific Factors This report applies to Sites A and B in the I-405 Renton To Bellevue Express Toll Lanes project. GeoEngineers considered a number of unique, project-specific factors when establishing the scope of services for this project and report. Unless GeoEngineers specifically indicates otherwise, do not rely on this report if it was: ■ not prepared for you, ■ not prepared for your project, ■ not prepared for the specific site explored, or ■ completed before important project changes were made. If important changes are made after the date of this report, GeoEngineers should be given the opportunity to review our interpretations and recommendations and provide written modifications or confirmation, as appropriate. 2 Developed based on material provided by ASFE, The GeoProfessional Association; www.asfe.org. January 12, 2018 | Page D-2 File No. 0180-349-00 Reliance Conditions for Third Parties No third party may rely on the product of our services unless GeoEngineers agrees in advance, and in writing to such reliance. This is to provide our firm with reasonable protection against open-ended liability claims by third parties with whom there would otherwise be no contractual limits to their actions. Environmental Regulations Are Always Evolving Some substances may be present in the site vicinity in quantities or under conditions that may have led, or may lead, to contamination of the subject site, but are not included in current local, state or federal regulatory definitions of hazardous substances or do not otherwise present current potential liability. GeoEngineers cannot be responsible if the standards for appropriate inquiry, or regulatory definitions of hazardous substance, change or if more stringent environmental standards are developed in the future. Subsurface Conditions Can Change This report is based on conditions that existed at the time our site studies were performed. The findings and conclusions of this report may be affected by the passage of time, by manmade events such as construction on or adjacent to the site, by new releases of hazardous substances, or by natural events such as floods, earthquakes and slope instability or groundwater fluctuations. Always contact GeoEngineers before applying this report to determine if it is still applicable. Biological Pollutants GeoEngineers’ Scope of Work specifically excludes the investigation, detection, prevention or assessment of the presence of Biological Pollutants. Accordingly, this report does not include any interpretations, recommendations, findings, or conclusions regarding the detecting, assessing, preventing or abating of Biological Pollutants and no conclusions or inferences should be drawn regarding Biological Pollutants, as they may relate to this project. The term “Biological Pollutants” includes, but is not limited to, molds, fungi, spores, bacteria, and viruses, and/or any of their byproducts. If Client desires these specialized services, they should be obtained from a consultant who offers services in this specialized field. Do Not Redraw the Exploration Logs Environmental scientists prepare final boring and testing logs based upon their interpretation of field logs and laboratory data. To prevent errors or omissions, the logs included in an environmental report should never be redrawn for inclusion in other design drawings. Only photographic or electronic reproduction is acceptable, but recognize that separating logs from the report can elevate risk. Geotechnical, Geologic and Environmental Reports Should Not Be Interchanged The equipment, techniques and personnel used to perform an environmental study differ significantly from those used to perform a geotechnical or geologic study and vice versa. For that reason, a geotechnical engineering or geologic report does not usually relate any environmental findings, conclusions or recommendations; e.g., about the likelihood of encountering underground storage tanks or regulated contaminants. Similarly, environmental reports are not used to address geotechnical or geologic concerns regarding a specific project. January 12, 2018 | Page D-3 File No. 0180-349-00 Soil and Groundwater End Use The cleanup levels referenced in this report are site- and situation-specific. The cleanup levels may not be applicable for other sites or for other on-site uses of the affected media (soil and/or groundwater). Note that hazardous substances may be present in some of the site soil and/or groundwater at detectable concentrations that are less than the referenced cleanup levels. GeoEngineers should be contacted prior to the export of soil or groundwater from the subject site or reuse of the affected media on Site to evaluate the potential for associated environmental liabilities. We cannot be responsible for potential environmental liability arising out of the transfer of soil and/or groundwater from the subject Site to another location or its reuse on site in instances that we were not aware of or could not control. Most Environmental Findings Are Professional Opinions Our interpretations of subsurface conditions are based on field observations and chemical analytical data from widely spaced sampling locations at the site. Site exploration identifies subsurface conditions only at those points where subsurface tests are conducted or samples are taken. GeoEngineers reviewed field and laboratory data and then applied our professional judgment to render an opinion about subsurface conditions throughout the site. Actual subsurface conditions may differ – sometimes significantly – from those indicated in this report. Our report, conclusions and interpretations should not be construed as a warranty of the subsurface conditions. 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