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Home My WebLink AboutRS_DUIP_Geotechnical_Report_20200416_v1 20181376.003A/SEA19R102863_Rev5 Page i of v March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com GEOTECHNICAL AND ENVIRONMENTAL REPORT DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON KLEINFELDER PROJECT # 20181376.003A MARCH 31, 2020 Copyright 2020 Kleinfelder All Rights Reserved ONLY THE CLIENT OR ITS DESIGNATED REPRESENTATIVES MAY USE THIS DOCUMENT AND ONLY FOR THE SPECIFIC PROJECT FOR WHICH THIS REPORT WAS PREPARED. 20181376.003A/SEA19R102863_Rev5 Page ii of v March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com A Report Prepared for: Mr. Ty Todano Murraysmith, Inc. 600 University Street, Suite 300 Seattle, WA 98101 GEOTECHNICAL AND ENVIRONMENTAL REPORT DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON Will Rosso, EIT Professional Corinne Hillard, PG (UT) Senior Professional Marcus B. Byers, PE, P.Eng Principal Geotechnical Engineer Senior Project Manager KLEINFELDER 14710 NE 87th Street, Suite 100 Redmond, WA 98052 p | 425.636.7900 f | 425.636.7901 March 31, 2020 Kleinfelder Project No.:20181376.003A 20181376.003A/SEA19R102863_Rev5 Page iii of v March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com TABLE OF CONTENTS Section Page 1 INTRODUCTION AND SCOPE ........................................................................................ 1 1.1 GENERAL ............................................................................................................. 1 1.2 PROJECT UNDERSTANDING ............................................................................. 1 1.3 SCOPE OF SERVICES ......................................................................................... 2 2 GEOTECHNICAL FIELD EXPLORATIONS AND LABORATORY TESTING ................. 4 2.1 FIELD EXPLORATIONS ....................................................................................... 4 2.2 GEOTECHNICAL LABORATORY TESTING ........................................................ 6 3 SITE CONDITIONS ........................................................................................................... 7 3.1 SURFACE CONDITIONS ...................................................................................... 7 3.2 GEOLOGIC SETTING ........................................................................................... 7 3.3 EXISTING GEOTECHNICAL DATA ...................................................................... 8 3.4 SUBSURFACE CONDITIONS ............................................................................ 10 3.4.1 Soils ......................................................................................................... 10 3.4.2 Pavements ............................................................................................... 11 3.4.3 Groundwater ............................................................................................ 12 4 GEOLOGIC HAZARDS .................................................................................................. 14 5 GEOTECHNICAL CONCLUSIONS AND RECOMMENDATIONS ................................. 15 5.1 GENERAL ........................................................................................................... 15 5.2 EXCAVATIONS ................................................................................................... 17 5.2.1 General .................................................................................................... 17 5.2.2 Excavation Conditions and Obstructions ................................................. 18 5.2.3 Settlement Monitoring .............................................................................. 18 5.2.4 Temporary Slopes ................................................................................... 18 5.2.5 Temporary Shoring .................................................................................. 19 5.2.6 Substitute Methods .................................................................................. 21 5.3 DEMOLITION ...................................................................................................... 23 5.4 PAVEMENTS ...................................................................................................... 24 5.5 EARTHWORK ..................................................................................................... 25 5.5.1 Trench and Manhole Subgrades ............................................................. 25 5.5.2 Weather Considerations .......................................................................... 26 5.5.3 Structural Fill Materials ............................................................................ 26 5.5.4 Structural Fill Placement and Compaction ............................................... 27 5.5.5 Construction Dewatering ......................................................................... 28 5.6 CULVERT ACCESS MANHOLE ......................................................................... 29 5.6.1 General .................................................................................................... 29 5.6.2 Deep Foundation Support........................................................................ 30 5.7 CULVERT PENETRATION AND STRONGBACK .............................................. 31 5.8 MANHOLES ........................................................................................................ 31 6 ENVIRONMENTAL SCREENING AND FIELD INVESTIGATIONS ............................... 33 6.1 DESKTOP ENVIRONMENTAL SCREENING ..................................................... 33 6.2 ENVIRONMENTAL FIELD INVESTIGATION – FALL 2019 ................................ 34 20181376.003A/SEA19R102863_Rev5 Page iv of v March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 6.2.1 Environmental Soil Screening of Geotechnical Explorations – Fall 2019 34 6.2.2 Monitoring Well Installation – Fall 2019 ................................................... 34 6.2.3 Soil Analytical Test Results and IDW Disposal – Fall 2019 ..................... 35 6.3 ENVIRONMENTAL INVESTIGATION - DECEMBER 2019 ................................ 36 6.3.1 Environmental Soil Borings – December 2019 ........................................ 36 6.3.2 Groundwater Sampling - December 2019 ............................................... 36 6.3.3 Soil Analytical Results - December 2019 ................................................. 37 6.3.4 Groundwater Analytical Results – December 2019 ................................. 37 6.4 POTENTIAL SOURCES OF PETROLEUM IMPACTS ....................................... 39 6.5 CONCLUSIONS AND RECOMMENDATIONS ................................................... 39 6.5.1 Environmental Sampling Conclusions ..................................................... 39 6.5.2 Management of Impacted Soil and Groundwater .................................... 40 7 DEWATERING EVALUATION ....................................................................................... 41 7.1 GENERAL ........................................................................................................... 41 7.2 AQUIFER TESTING ............................................................................................ 42 7.2.1 Field Methods .......................................................................................... 42 7.2.2 Analysis ................................................................................................... 43 7.3 GRAIN SIZE DISTRIBUTION ANALYSIS ........................................................... 43 7.4 DISCUSSION OF SLUG TEST AND GRAIN SIZE DISTRIBUTION ANALYSIS Results ................................................................................................................ 44 7.5 DEWATERING FLOW ESTIMATES ................................................................... 45 7.5.1 Model Basis and Assumptions ................................................................. 45 7.5.2 Conceptual Dewatering Models ............................................................... 47 7.5.3 Model Results .......................................................................................... 47 8 LIMITATIONS ................................................................................................................. 49 9 REFERENCES ................................................................................................................ 51 FIGURES 1 Site Vicinity Map 2A Site and Exploration Plan 2B Approximate Utility Alignments and Depths 2C Cross-Section Location Map 3 Parcels of Potential Environmental Concern 4 Subsurface Cross Sections 5 Liquefaction Susceptibility Map TABLES 1 Encountered Pavement Sections Summary 2 Observed Groundwater Levels at Monitoring Wells 3 Groundwater Drawdown and Estimated Settlement 4A Soil Laboratory Analytical Results (Appendix C) 4B Groundwater Laboratory Analytical Results (Appendix C) 5 Aquifer Testing Wells Construction Summary 6 Hydraulic Conductivity Estimates from Slug Testing 7 Hydraulic Conductivity Estimates from Grain Size Analysis 8 Dewatering Well Flow Estimates for Hypothetical Trench 20181376.003A/SEA19R102863_Rev5 Page v of v March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com APPENDICES A Field Exploration Logs B Geotechnical Laboratory Testing C Environmental Laboratory Analytical Testing Summary, Reports and Tables D Slug Test Results E Environmental Field Logs F Important Information about This Geotechnical Engineering Report G Important Information about This Geoenvironmental Report 20181376.003A/SEA19R102863_Rev5 Page 1 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 1 INTRODUCTION AND SCOPE ___________________________________________________________________________________ 1.1 GENERAL This report presents the results of Kleinfelder’s geotechnical engineering and environmental engineering studies for the proposed utility improvements planned by the City of Renton (City). The proposed improvement area is primarily located along South 3rd Street, South 2nd Street, and Shattuck Avenue South in downtown Renton, Washington. Figure 1, Vicinity Map, shows the project location and approximate extents in relation to the greater City of Renton. Figure 2A, Site and Exploration Plan, shows the proposed utility locations along with the locations of our field explorations, which include hollow-stem auger borings, monitoring wells, and environmental geoprobes. Figure 2B, Utility Alignments and Depths, shows the proposed utility locations along with the approximate invert depths and groundwater levels observed in select locations in late 2019. 1.2 PROJECT UNDERSTANDING We based our project understanding on discussions with and site plans provided by Messrs. Jeff Kreshel, Ty Tadano, and Jeff Moss of Murraysmith. We understand the City is planning to reconstruct water, sewer, and stormwater utilities in a portion of the downtown corridor approximately bounded by South 2nd Street to the north, South 4th Street to the south, Rainier Avenue South to the west, and Mill Avenue South to the east. The specific project boundaries and extent of reconstruction varies for each of the utilities and are shown on the Site and Exploration Plan, Figure 2A. Replacement, rehabilitation and/or upsizing of the individual utilities is being performed due to age, capacity needs, condition, and/or maintenance requirements. A majority of the work is centered around South 2nd and 3rd Streets, which are major east-west arterial roadways located within the City’s Downtown area. Existing infrastructure along these streets primarily consists of single-story, commercial buildings and associated parking lots, mixed- use properties, parks, apartments, and Renton High School. These streets contain numerous utilities, both public and private, including the 108-inch diameter King County Eastside Interceptor and the three large diameter Seattle Public Utilities Cedar River water supply pipelines. Construction of the proposed utility improvements will require protection of existing building and 20181376.003A/SEA19R102863_Rev5 Page 2 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com utility infrastructure, with some utilities being installed immediately adjacent to existing structures and pipelines. We understand the utility depths will generally range between about 5 and 15 feet deep, with the exception of the sanitary sewer in the vicinity of South 3rd Street between and Whitworth and Burnett Avenues South, where it will extend up to about 29 feet deep, and at the interceptor tie in where it will be about 35 feet deep. Some other key aspects of the project include the following: · A new culvert access at the intersection of Rainier Avenue South and Southwest Sunset Avenue (which becomes South 3rd Street east of Rainier). This will require a pile-supported foundation in order to avoid imparting new loads on the culvert. · A deep tie in to connect the City sewer lines to the 108-inch diameter King County Eastside Interceptor at the intersection of South 3rd Street and Burnett Avenue South. The excavation for this tie in is expected to extend to a depth of approximately 35 feet deep and will be required immediately adjacent to a clock tower that is supported on a shallow matt foundation. · The water and sewer lines along Whitworth Avenue South will cross below the existing 52-inch and 66-inch diameter Seattle Public Utilities Cedar River Pipelines and temporary support of the pipelines will be required. 1.3 SCOPE OF SERVICES The geotechnical and environmental services portion of the project is broken into four phases, with geotechnical and environmental support services as follows: Prior, Completed Phases: · Phase 1 Conceptual Analysis & Design: This phase of the project included preliminary desktop-level geotechnical and environmental studies by Kleinfelder. This was completed on September 1, 2017. · Phase 2 Preliminary Design Support - Groundwater Level Monitoring Wells: In this phase of the project, Kleinfelder performed seven geotechnical borings that were completed as 2-inch diameter PVC groundwater level monitoring wells. The wells were 20181376.003A/SEA19R102863_Rev5 Page 3 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com used to aid in identifying seasonal variations in depth to groundwater across the project area and allow the team to evaluate what locations may require dewatering during construction. · Phase 3A Geotechnical Preliminary Design and Environmental Monitoring: Geotechnical and limited environmental field studies/screening and reporting, and development of 50% plans by the project team. · Phase 3B Environmental Supplement: Additional environmental field studies were completed within the boundaries of the site at select locations identified as having the potential for soil and groundwater impacts. The purpose of Phase 3B was to assess locations of potential environmental concern not assessed during Phase 3A. Current Phases: · Phase 3C Final Design: Development of plans and specifications by the project team with Kleinfelder providing consulting support, as well as shoring and dewatering recommendations and recommendations for the contaminated materials construction management planning. Future Phase: · Phase 4 Construction Management: This is anticipated to include periodic consulting and support for submittal and RFI review. 20181376.003A/SEA19R102863_Rev5 Page 4 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 2 GEOTECHNICAL FIELD EXPLORATIONS AND LABORATORY TESTING ___________________________________________________________________________________ 2.1 FIELD EXPLORATIONS Boring locations were marked out in white paint approximately two weeks prior to drilling to support utility locate activities per Washington state law. Kleinfelder notified the local One-Call Utility locate service and retained a private utility locate service prior to performing the explorations. Multiple trips to the site were made to confirm that utility locates were completed and to move exploration locations, where practical, if underground utilities were marked at the proposed locations. In particular, explorations were moved if fiber optic lines were marked nearby. In areas with an abundance of nearby utilities, but where it was not practical to move the exploration, an air knife and vacuum were used to pothole past the anticipated utility depths, which was generally a depth of about five feet. The field exploration program was conducted in three general phases, both under full-time observation of a Kleinfelder geologist or geotechnical engineer. The boring logs for both field explorations can be found in Appendix A of this report. The first phase was conducted between April 15 and April 18, 2019, and included installing seven monitoring wells, designated MW-1 through MW-8. The monitoring well designated MW-7 was not installed due to unresolvable utility conflicts. The second phase was conducted between September 26 and October 19, 2019, and included eighteen borings, designated KB-1 through KB-18. The third phase was conducted between December 12 through 17, 2019, and included two borings, designated KB-19 and KB-20, and five environmental probes, designated P-9 through P-13. Appendix A presents summary logs of the borings and monitoring well explorations. Appendix E presents environmental field logs for the environmental probes. Samples from the borings were examined for staining and screened using a photo-ionization detector (PID) for volatile organic compounds while drilling. Borings not initially planned as monitoring wells that had visual staining or PID readings above 5.0 parts per million (ppm) were converted to 2-inch PVC monitoring wells to support supplemental environmental testing. The sample with the highest measured concentration from each of these impacted borings was sent to a third-party laboratory for testing. Soil cuttings and water from these explorations were placed in 55-gallon drums and transported to a City of Renton maintenance yard for storage until testing 20181376.003A/SEA19R102863_Rev5 Page 5 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com and proper disposal could be completed. Augers and downhole sampling equipment were decontaminated prior to mobilizing to the next boring. Potholing for boring KB-5 encountered an unknown concrete element and PVC pipe in two separate locations. These elements were encountered at least 3 feet from utilities that were marked in the area and may be a buried and abandoned line, utilidor, or other structure. This boring was advanced successfully after a third attempt was made approximately 15 feet east of the original location. Borings were advanced with a truck-mounted CME75 drill rig utilizing hollow-stem auger drilling techniques. Monitoring wells were drilled to depths of approximately 16 to 46 feet bgs. Borings KB-1 through KB-18 were drilled to depths of approximately 30 feet bgs, except for KB-4, which was completed at 45 feet bgs, and KB-16 and KB-5, which were completed at 20 feet bgs. Boring KB-19 was drilled to a depth of about 45 feet and KB-20 was drilled to a depth of about 51 feet. Geotechnical soil sampling consisted of SPT samples taken at 2.5-foot intervals in the first 10 feet and 5-foot intervals thereafter. Shelby tube samples were not collected due to encountering predominantly granular soils with infrequent and relatively thin lenses of silt and clay soils. Heave was encountered in some explorations and is noted on the corresponding boring logs. It should be noted that blow counts were likely affected in areas with heave and they should be interpreted accordingly. Drilling mud was added to the auger on a number of borings to control heave. Samples collected during the field investigation were stored in plastic bags and delivered to Kleinfelder’s laboratory for testing. Samples from soil with visible staining or elevated PID testing, as well as samples from the environmental probes were sent to an outside lab for environmental testing. The asphalt surface was repaired with dyed concrete by the driller. Soil cuttings and water were placed into barrels with lids. Drums that contained soil with no visible indication of contamination and no elevated PID readings were deemed “clean” and hauled off-site as clean cuttings. The locations and elevations of all monitoring wells and borings KB-1 through KB-18 were surveyed by others after completion. Elevations of these explorations are presented on the boring logs to the nearest tenth of a foot based on NAVD 88. Borings KB-19 and KB-20 were not surveyed and we estimated the elevations based on site topography. 20181376.003A/SEA19R102863_Rev5 Page 6 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 2.2 GEOTECHNICAL LABORATORY TESTING Laboratory testing was conducted on selected representative samples obtained from the borings to help characterize the site soils and determine relevant engineering and index properties. Laboratory testing included determination of natural moisture content, grain-size distribution, Atterberg limits, hydrometer analysis, and a modified proctor to determine the soil’s optimum moisture content. Tests were conducted in general accordance with appropriate American Society for Testing and Materials (ASTM) Standards and results can be found in Appendix B. 20181376.003A/SEA19R102863_Rev5 Page 7 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 3 SITE CONDITIONS ___________________________________________________________________________________ 3.1 SURFACE CONDITIONS The proposed utility improvements are located in downtown Renton within an area approximately bounded by South 2nd Street to the north, South 4th Street to the south, Rainier Avenue South to the west, and Mill Avenue South to the east, as shown on the Vicinity Map, Figure 1. A majority of the work is centered around South 2nd and 3rd Streets, which are major east-west arterial roadways located within the City’s Downtown area. Existing infrastructure along these streets primarily consists of single-story, commercial buildings and associated parking lots, mixed-use properties, parks, apartments, and Renton High School. Topography in the area is generally flat and elevations in the vicinity of the improvements generally range from about Elevation 30 to 40 feet (NAVD 88). The field explorations were performed on existing roadway surfaces, which consisted of asphalt concrete underlain by aggregate base, concrete pavement, and/or brick. 3.2 GEOLOGIC SETTING The project area is located in the central portion of the Puget Lowlands, an elongated, north-south depression situated between the Olympic Mountains and the Cascade Range. Repeated glacial advances (glacial events) into this region strongly influenced present-day topography, geology, and groundwater conditions in the project area. Puget Lowlands consist of a variety of soils from glacially overridden lacustrine deposits to outwash and glacial drift deposits. Fine grained and course grained alluvium and flood plain deposits, volcanic mudflows, and landslide materials are all present in the general project vicinity. Based on the Washington Department of Natural Resources Interactive Geologic Map (1:250,000 scale), surficial soils at the site are anticipated to consist of fill. Fill may consist of well compacted material free of organics (engineered fills) or poorly compacted materials containing organics, timbers, debris, and other unknown objects (undocumented fills). The anticipated thickness of the fill layer varies but may be on the order of 10 feet where present. Mapping at the 1:500,000 scale indicates that the project area is underlain by a variety of native soils ranging from alluvium to till-like glacial drifts. The alluvium materials, interbedded silty sands and sandy silts with organic silts and peat, likely range from 50 to 80 feet thick. Below this, soils are anticipated to transition 20181376.003A/SEA19R102863_Rev5 Page 8 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com into glacial drift deposits, which consist of till-like dense sandy gravel and gravelly sand, with cobbles and boulders strewn within. Data presented in readily available geotechnical reports prepared for prior projects within the vicinity indicated a variety of soil types ranging from artificial fill to glacial drift gravels to silt rich organic soils. Groundwater is reported to range from as shallow as 4 feet below ground surface to as deep as 20 feet, with the average depth of about 12 feet. The depth to groundwater is expected to vary with seasonal changes in rainfall and surface runoff, impacts of local development, nearby leaking utilities, and the level of the Cedar River. The geology of some portions of the site are impacted by the former Black River, which dried up after construction of the Montlake Cut was completed in 1916 (Ott 2010). In 1911, there was a major flood along the lower Cedar River prompting the city of Renton to divert the Cedar River directly into Lake Washington. Before the Cedar River was diverted, it emptied into the Black River instead of Lake Washington as it does now. The Black River flowed south draining the southern end of Lake Washington into the Duwamish River. The diversion was completed in 1912 around the same time the Montlake Cut began. The Site and Exploration Plan, Figure 2A, depicts the approximate former channels of the Black and Cedar Rivers. The western-most portion of the planned utilities in South 2nd and 3rd Streets traverse the former Black River channel and two borings drilled in this area, KB-1 and MW-2, encountered fills, which is consistent with backfilling of the old channel. 3.3 EXISTING GEOTECHNICAL DATA General geotechnical information for the project area was obtained from available geotechnical reports prepared for previous projects in the vicinity of the project. These reports were prepared by other consultants and provided to us by the City and included: · Geotechnical Engineering Study, Proposed Mixed-Use Building, 207-219 Main Avenue South, Renton, Washington, prepared by Geotech Consultants, Inc., July 18, 2007. · Report of Geotechnical investigation, Lake Ave S. Storm System Project, Renton, Washington, S&EE Job No. 912, prepared by Soil & Environmental Engineers, Inc., February 10, 2011. 20181376.003A/SEA19R102863_Rev5 Page 9 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com · Report of Geotechnical Engineering Services, City of Renton, Downtown Circulation Project – Phase 1, Main Avenue South and Bronson Way South, Renton Washington, prepared by GeoDesign, Inc., January 14, 2016. · Geotechnical Evaluation, Renton Heritage Apartments, South 2nd Street and Main Ave., Renton, Washington, prepared by Earth Solutions NW LLC., September 11, 2014. The 2007 study for 207-219 Main Ave South included seven borings drilled to depths of about 39 feet. This program indicated that the site is underlain by loose to medium dense alluvial sands and gravels. These soils become dense at depths of approximately 20 to 25 feet, except for the northwest corner of the explored area where dense soil was encountered at about 32 feet. Groundwater seepage was observed at depths of about 20 to 26 feet. The presence of potentially caving soil and groundwater seepage near the surface and the presence of potentially liquefiable soils below the water table were noted in this report. The 2007 study notes that an existing building located immediately south of the project site was observed to have experienced severe settlement after it was constructed; details of the timing and/or cause of the settlement are not provided, but it is inferred that the settlement was observed during field exploration for the 207-219 Main project. The study anticipates that a basement excavation will be completed immediately adjacent to the existing building and cautions to avoid strong ground vibrations during construction and demolition, such as strong pounding of the ground with an excavator to break up concrete during demolition. The report also recommends an existing-condition survey and settlement monitoring on the existing building while construction occurs on the 207-219 Main project. These recommendations are relevant to the downtown utility improvements project and emphasize the importance of performing an existing-condition survey prior to construction and performing settlement monitoring when adjacent construction activities are occurring. The 2010 study for the drainage easement for the Lake Avenue South Storm System Project at Lake Avenue South / Rainier Avenue South included three borings drilled to depths ranging from approximately 30 to 41 feet. This program indicated that the site is underlain by about 10 to 11 feet of fill consisting of very loose to medium dense silty sand, sand and sandy gravel. The fill is underlain by 15 to 41 feet of loose to medium dense interbedded sand and gravel alluvium. The report also identifies a layer of organic silt at depths of 13 to 15 feet that was encountered in one borehole. Fine grained, very hard sandstone was encountered at a depth of about 25 feet in one borehole. Groundwater was encountered at a depth of about 10 feet at the three boring locations. 20181376.003A/SEA19R102863_Rev5 Page 10 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com Construction dewatering along the pipeline alignment using deep wells or well points was recommended. The 2010 study states that the risks of excessive settlement of neighboring buildings due to dewatering was low. The 2014 study for the South 2nd Street and Main Avenue project included review of borings from three prior projects. The report included logs of two prior borings drilled to depths of about 31 to 36 feet. Subsurface conditions were characterized as loose to medium dense sand and gravel deposits. The referenced reports identified loose soil conditions to varying depths of up to 20 feet below grade. Groundwater was identified at depths of roughly 20 feet. The 2016 study for Phase 1 of the City of Renton Downtown Circulation project consisted of two borings drilled to depths of approximately 31 and 41 feet. Groundwater was reported at a depth of about 25 feet and isolated wet zones were reported at depths of 10 and 20 feet. This report also indicated that subsurface conditions generally consist of sand with variable gravel content. 3.4 SUBSURFACE CONDITIONS 3.4.1 Soils Based on our review of existing geotechnical data and the conditions encountered in our borings, soils along the alignment are somewhat variable. Historical events such as the diversion of the Cedar River, lowering the level of Lake Washington, the drying up and filling of the Black River channel, and land modification associated with development have had a significant impact on this site’s topography and surface geology. We have characterized soils encountered in our explorations in generalized units for the purpose of discussion, which are described below in the order encountered. The summary exploration logs in Appendix A present more detail relative to the subsurface conditions observed at specific locations. Figure 2C presents a Cross-Section Location Map and Figure 4 presents cross-sections depicting boring logs along various portions of the alignment. · Fill: These soils were encountered in a number of borings and comprised of a mix of silts and sands with varying amounts of gravels. Fills generally ranged from about 5½ to 20 feet thick. Moisture contents were typically 15 to 40 percent but were observed to be as low as 2 percent in the samples with a high gravel content and as high as 164 percent in one fine-grained sample. Fill soils were typically loose to medium dense with a number of very loose samples observed, and a single dense sample observed in KB-5. 20181376.003A/SEA19R102863_Rev5 Page 11 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com · Alluvium: These soils were encountered below the pavement section and/or fill in all borings and extended to the bottom of most borings. They were comprised of a mix of coarse sands and fine gravels with varying silt content. Moisture contents were typically 15 to 30 percent and ranged from a low of about 3 percent to a high of 72 percent. Sample density ranged from loose to dense with most samples being medium dense and the deposit generally becoming denser with depth. · Wood: Boring KB-4 encountered a piece of wood (interpreted as timber or log) at a depth of approximately 25 feet. The sample had a moisture content 235.3 percent. KB-4 is located near the former Cedar River and this material may be associated with deposits from before the river was diverted. · Siltstone Bedrock: Siltstone bedrock was encountered in borings KB-1, KB-19 and MW-1 at depths of 30½, 44½, and 20 feet, respectively. The hollow-stem auger drill rig was able to penetrate the siltstone about 1 foot in KB-1 (where the boring was terminated at the planned depth), about 5 feet in MW-1, and met refusal on the siltstone in KB-19. The siltstone was observed toward the west end of the project alignment but is likely present below other portions of the site. 3.4.2 Pavements Explorations encountered pavement sections of asphaltic concrete between approximately 2 to 10 inches thick; however, the thinner sections of asphalt were often underlain by concrete sections up to approximately 7 inches thick. Some explorations also encountered brick layers beneath the asphalt or concrete. Total pavement sections were typically on the order of 10 inches thick. Table 1 presents additional information on the pavement sections encountered in our explorations. 20181376.003A/SEA19R102863_Rev5 Page 12 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com Table 1: Existing Pavement Sections Summary Exploration HMA (in) PCC (in) Brick (in) Total (in) KB-1 2½ - - 2½ KB-2 10 - - 10 KB-3 4½ 6½ - 11 KB-4 4 7 - 11 KB-5 4 8 - 12 KB-6 12 - - 12 KB-7 4 - - 4 KB-8 12 - - 12 KB-9 4½ - 2 6½ KB-10 11 - - 11 KB-11 6 - 4 10 KB-12 6½ 4 - 10½ KB-13 3 - - 3 KB-14 2 7 - 9 KB-15 4 8 - 12 KB-16 9½ - - 9½ KB-17 8 - - 8 KB-18 6 - - 6 MW-1 6 - - 6 MW-2 5 - - 5 MW-3 5 - - 5 MW-4 3 4 - 7 MW-5 Outside Pavement Area MW-6 8 6 - 14 MW-8 6 6 - 12 3.4.3 Groundwater Groundwater levels observed at the time of the field explorations ranged from approximately 12 to 15 feet deep. Subsequent monitoring, which was performed approximately once a month from April 2019 through January 2020, indicated groundwater levels ranging between depths of approximately 9 and 18 feet, depending on location and time of year. Table 2 presents the monitoring well groundwater readings. Groundwater levels are expected to vary with location and will fluctuate with time of year, precipitation, level of the Cedar River, dewatering or pumping for other projects and facilities, and other factors. Groundwater levels fluctuated approximately 2 to 3 feet throughout the monitoring 20181376.003A/SEA19R102863_Rev5 Page 13 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com period, with the exception of MW-6, which fluctuated about 5 feet, and KB-14, which fluctuated about 4 feet. It should be noted that groundwater levels observed in MW-6 are anomalous relative to the other wells as the observed groundwater level dropped after the monitoring period entered what is traditionally the wetter time of the year. In addition, the highest and lowest groundwater elevations observed in MW-6 are generally about 5 feet higher than those of other wells in the area. This could be caused by factors such as a leaking utility, influence from water in adjacent utility trench backfill, or other unknown causes. A detailed investigation of regional groundwater conditions was not included in this report and was outside the scope of this study. Table 2: Observed Groundwater Levels at Monitoring Wells Monitoring Well Approximate Groundwater Depth Below Ground Surface (feet) Highest Observed Groundwater Elevation Lowest Observed Groundwater Elevation April 14, 2019 May 16, 2019 June 6, 2019 August 22, 2019 September 9, 2019 October 5, 2019 October 27, 2019 November 26 ,2019 January 17, 2020 MW-1 10.0 * 8.7 9.1 9.2 9.0 9.7 8.6 8.2 29.5 27.7 MW-2 12.0 * 12.9 12.9 12.9 12.7 11.7 12.0 11.4 20.7 19.2 MW-3 11.5 11.0 11.8 12.5 12.4 12.1 10.2 10.8 * 22.1 19.8 MW-4 11.8 11.0 11.9 12.7 12.7 12.4 10.3 10.8 9.4 24.0 19.6 MW-5 15.6 16.1 17.2 17.8 17.8 17.5 15.4 16.0 14.3 24.0 20.5 MW-6 10.0 7.0 7.2 8.9 9.1 8.6 12.2 12.4 9.7 29.7 24.3 MW-8 7.0 8.0 8.7 9.4 9.4 8.9 7.2 7.5 6.3 22.4 19.3 KB-1 ** ** ** ** ** ** 8.5 6.1 8.5 22.4 20.0 KB-10 ** ** ** ** ** ** 13.5 13.4 11.7 23.4 21.6 KB-11 ** ** ** ** ** ** 12.0 12.8 11.3 23.3 21.8 KB-14 ** ** ** ** ** ** 15.0 10.8 7.2 25.2 17.4 KB-18 ** ** ** ** ** ** 10.0 8.0 7.1 20.9 18.0 * Monitoring well location inaccessible at time of site visit, reading not performed. ** monitoring well not completed until October 2019. 20181376.003A/SEA19R102863_Rev5 Page 14 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 4 GEOLOGIC HAZARDS ___________________________________________________________________________________ The site is located in moderate to high liquefaction susceptibility hazard area per King County Flood Control District Map 11-5 Liquefaction Susceptibility (refer to Figure 5). Soil liquefaction is a condition where saturated, granular soils undergo a substantial loss of strength due to pore pressure increase from cyclic stress induced by earthquakes. In the process, the soil may undergo horizontal displacements (lateral spreading) and vertical settlement. Utility damage caused by liquefaction and lateral spreading include, but is not limited to, pulled / broken connections, pipe breakage, loss of gravity flow due to vertical displacement, and uplift or floatation, particularly in manhole structures that extend below the groundwater table. Areas along the project alignment are relatively flat and are generally not considered susceptible to landslide or seismically-induced slope failures. 20181376.003A/SEA19R102863_Rev5 Page 15 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 5 GEOTECHNICAL CONCLUSIONS AND RECOMMENDATIONS ___________________________________________________________________________________ 5.1 GENERAL General conclusions and recommendations developed based on the results of our exploration and analysis are summarized below and detailed in the following sections. Geotechnical conclusions and recommendations should be evaluated along with environmental conclusions and recommendations presented in Section 6, and dewatering information presented in Section 7. · The contractor will be responsible for selecting appropriate means and methods to accomplish the utility installation. It is important that means and methods consider many factors, including but not limited to, the factors discussed in this report, and summarized below: o Variable soil conditions including soft fine-grained soils, loose granular soils, dense granular soils, and siltstone bedrock; o Shallow groundwater and the need to dewater or control groundwater for the deeper utilities while also limiting groundwater drawdown and preventing settlement of existing utilities and structures; and, o Soil and groundwater contamination along portions of the alignment and the need to properly handle and dispose of contaminated materials. Dewatering should be accomplished in a manner that does not spread contamination. · We anticipate that the work will be accomplished utilizing open cut methods with structural and non-structural shoring. However, we understand the contractor will be allowed to propose substitute methods. · Excavations for utility installation will be made adjacent to existing utilities, structures or pavements that are to remain and require protection. Site soils, particularly the weaker soils, and soils below the groundwater table, are highly susceptible to sloughing, raveling and flowing. Positive support of soils in the trench walls will be required in many areas in order to limit disturbance beyond the trench. 20181376.003A/SEA19R102863_Rev5 Page 16 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com · Excessive vibrations may cause ground settlement, and corresponding settlement and damage to nearby utilities and buildings if proper precautions are not taken. Use of vibratory methods to install shoring should be evaluated carefully and appropriate pre-condition surveys, vibration monitoring, and settlement monitoring should be performed. · The approach to construction dewatering should account for soil and groundwater contamination including handling and disposal of dewatering discharge and potential migration of contaminant plumes. We recommend that the contractor utilize means and methods that limit construction dewatering drawdown beyond the limits of the temporary excavation to the greatest extent practical. This may include dewatering within sheet piles, use of cutoff walls, recharge wells, or other methods. · The contractor will need to carefully evaluate shoring means and methods for accomplishing the work. We anticipate that a combination of structural and non-structural shoring methods will be required. Structural shoring, as defined in Section 2-09.3(3) D of the WSDOT Standard Specifications, is a shoring system that is installed prior to excavation and provides lateral support of soils to limit lateral movement. Non-structural shoring, which is installed after excavation, may provide worker protection, but typically allows some soil movement and does not provide the same level of protection for existing infrastructure. · Excavations located away from existing utilities, structures or pavements that will remain in place can be sloped when made above the ground water table, but this will require a larger excavation volume and increased pavement restoration areas, and may not accommodate traffic lanes that must remain open. · We recommend settlement monitoring points be established along the existing utilities and structures, and that settlement / lateral movement criteria, and a monitoring schedule be developed based on the construction type and sensitivity of those utilities or structures to movement. · A pre-construction survey of buildings, which includes photo and video documentation of cladding, walls, and floors, is recommended for areas where excavations will be performed close to buildings. A suggested rule of thumb would be to survey buildings where the distance from the edge of the excavation to the building is less than the depth of the excavation. 20181376.003A/SEA19R102863_Rev5 Page 17 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com · We understand current WSDOT Standard Specifications for Road, Bridge, and Municipal Construction will be used for this project and will be modified as necessary with project-specific special provisions. 5.2 EXCAVATIONS 5.2.1 General The contractor will need to carefully evaluate the combination of shoring and dewatering means and methods for accomplishing the work. Considerations include worker safety, protection of existing buildings and utilities, and preventing mobilization of contaminants. Given the depth of the utilities and excavation below the ground water table, we anticipate that shoring requirements for this project will include both non-structural and structural shoring as defined in Section 2-09.3(3) D of the WSDOT Standard Specifications. Structural shoring provides support prior to excavation to limit lateral movement and can include a variety of methods, some of which are discussed in in Section 5.2.5.1. Non-structural shoring could include trench boxes or other systems, which are installed after the excavation is completed. These systems may provide worker protection, but typically allow soil movement, do not provide the same level of protection for existing infrastructure, and will be difficult to install in soils that do not stand unsupported. Some of these methods are discussed in Section 5.2.5.2. Water main excavations are largely anticipated to be above the groundwater table, with the exception of the Cedar River Pipeline undercrossing at Whitworth Avenue South and Shattuck Avenue South. Stormwater main excavations are largely anticipated to be above the groundwater table, with the exception of a portion of the stormwater line in Shattuck Avenue South south of South 3rd Street. Depending on new utility depths, proximity to other utilities and structures, the need to maintain traffic lanes, and the amount of trench sloughing, it may be feasible to complete many of these excavations with non-structural shoring. At the Cedar River Pipeline undercrossings, it is critical that support of the pipeline be maintained such that no movement occurs. Use of structural shoring, temporary bracing and pipeline support, a jack and bore, and/or other similar means and methods may be required. We anticipate that structural shoring or trenchless installation methods, with and without dewatering, will need to be considered for the sanitary sewer main installation along South 3rd 20181376.003A/SEA19R102863_Rev5 Page 18 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com Street. The groundwater table has been observed at depths of approximately 10 to 13 feet in this area and the sewer depths range from about 11 to 29 feet along South 3rd Street, with the tie in to the Eastside Interceptor occurring at a depth of about 35 feet at Burnett Place South. 5.2.2 Excavation Conditions and Obstructions We anticipate that excavation of the on-site fill and alluvial deposits can be performed with conventional earthmoving equipment. Logs, construction debris, concrete slabs or utilidors may be encountered during excavation activities. While not anticipated, if old piles or concrete utility ducts are encountered, they should be cut off at least 3 feet below subgrade level. The contractor should anticipate the excavation, removal, and replacement of these materials with compacted structural fill as recommended in Sections 5.5.3 and 5.5.4. Due to the numerous utilities existing on site potholing should be performed prior to completing some excavations. Hand excavation and/or use of a vacuum truck may be advantageous when excavating around some utilities. 5.2.3 Settlement Monitoring We recommend settlement monitoring points be established along the existing utilities and structures and settlement / lateral movement criteria be developed based on the construction type and sensitivity of those utilities or structures to movement. Where non-structural shoring systems, such as trench boxes, do not provide adequate ground support, structural shoring should be utilized. Excavations located away from existing utilities, structures or pavements that will remain in place can be sloped when made above the ground water table. Additional discussion of settlement and dewatering is presented in Section 5.5.5. 5.2.4 Temporary Slopes All excavations and slopes must comply with applicable local, state, and federal safety regulations including the current OSHA Excavation and Trench Safety Standards and WISHA Safety Standards for Construction Work. Construction site safety is the sole responsibility of the Contractor, who shall also be solely responsible for the means, methods, and sequencing of construction operations. Most of the on-site soils should be considered as Type C soils, which should be inclined no steeper than 1½H:1V. However, some of the site soils are soft / loose and may require even flatter sloping to be stable and safe. The above recommendations are for excavations made above the 20181376.003A/SEA19R102863_Rev5 Page 19 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com groundwater table. Excavations made below the groundwater table should be shored. Due to proximity to utilities and the need to maintain some traffic lanes in roadways, sloping of excavations may be impractical. Temporary slopes should be protected from the elements by covering with plastic sheeting or similar means. Sheeting sections should overlap by at least 12 inches and be tightly secured with sandbags, tires, staking, or other means to prevent wind from exposing the soils under the sheeting. Heavy equipment, building materials, excavated soil, and vehicular traffic should not be allowed near the top of any sloped temporary excavation. 5.2.5 Temporary Shoring Where the stability of adjoining buildings, walls, or other structures is endangered by excavation operations, support systems such as shoring, bracing, or underpinning may be required to provide structural stability and to protect personnel working within the excavation. If earth retention, structural-shoring, bracing, or underpinning are used for the project they should be designed by a professional engineer registered in the State of Washington. Temporary shoring should be utilized where sloping excavations is not practical. Excavations that are adjacent to existing utilities, structures or pavements that are to remain should be shored to prevent ground loss or movement and potential damage to the existing utilities or structures. 5.2.5.1 Structural Shoring Structural shoring includes systems that are installed and provide soil support prior to excavation per Section 2-09.3(3) D of the WSDOT Standard Specifications. Some examples of structural shoring systems include driven cantilever sheet piles; sheet piles with tiebacks, wale rings or struts; cantilever soldier piles with lagging and soldier piles with lagging and tiebacks. Some excavations will require structural shoring coordinated with an appropriate dewatering system that accounts for soil and groundwater contamination, among other factors. Structural shoring may be required due to the proximity of existing utilities or structures, due to weak soils that cave or slough rapidly, to limit areas of disturbance, or other factors. The following sections present a short discussion of two potential structural shoring options and are not intended to limit the contractor’s available means and methods for structural shoring. 20181376.003A/SEA19R102863_Rev5 Page 20 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com Sheet Piles Due to concerns about vibration induced settlement, construction of a sheet pile shoring system using impact and conventional vibratory hammers are not recommended. However, sheet piles installed using a variable eccentric moment hammer could be considered. A vibratory hammer with a variable eccentric moment can be started and stopped with much lower vibration levels than with conventional hammers, which can allow sheet piles to be installed near settlement sensitive structures such as buildings and nearby utilities. The sheet pile shoring system could be either cantilever or braced depending on the required excavation height and groundwater levels. One potential issue with a sheet pile shoring system would be the relatively deep embedment required to cut off groundwater flow to meet base heave stability requirements. Dense gravels encountered at depth, and in some locations, siltstone bedrock, may also prevent sheets from being driven to the design tip elevation or cause them to be driven out of interlock thereby allowing seepage and soil movement into the excavation. Sheet pile embedment requirements for groundwater cutoff could be reduced by installing a jet grout cut-off barrier below the minimum required tip for structural considerations or by using a dewatering / depressurization system. Soldier Piles and Lagging Soldier piles can be installed in conventional drilled holes, but temporary casing and use of a slurry and/or water surcharge to control bottom heave should be anticipated for installation especially below the groundwater table. For solider piles that are vibrated into place without a drilled hole, vibrations should be controlled in a similar manner as discussed above by use of a variable eccentric moment hammer. Timber or steel sheets can be used for lagging but the system should not be considered water tight and there will be significant risk of running / flowing sands entering the excavation unless dewatering is performed prior to excavation. Grouting or other ground improvement methods could be utilized prior to excavation to control groundwater flows and improve soil stability. Base heave stability requirements discussed above may also be a controlling factor in design of soldier pile shoring. 20181376.003A/SEA19R102863_Rev5 Page 21 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 5.2.5.2 Non-Structural Shoring Non-structural shoring includes systems that don’t meet the definition of structural shoring and can be divided into two general categories: shielding and shoring/bracing. Examples of shielding include trench boxes and sliding trench shields. Shields are intended primarily to protect workers from cave-ins and do not provide “positive” support of trench sidewalls. As a result, a significant amount of sloughing can occur outside of the trench box, resulting in increased surface disturbance. Examples of shoring/bracing include jacked or braced shores, and soldier pile, sheet pile, or similar shoring walls installed in front of a pre-excavated slope. Jacked or braced shores can utilize wood or aluminum sheeting and be supported with hydraulic, pneumatic, or screw jacks inserted against the sheeting and expanded to provide “positive” support of trench sidewalls. 5.2.6 Substitute Methods We anticipate that utility installation will be accomplished utilizing open cut methods with structural and non-structural shoring as well as dewatering. However, we understand that the contractor will be allowed to propose substitute methods, and that those methods would be subject to review, approval, and comment by the City and engineering consultants. A short discussion of two potential substitute methods is presented below. This discussion is not intended to confirm the ultimate suitability of these methods, nor limit potential for other substitute methods. 5.2.6.1 Ground Freezing Ground freezing is a construction technique used to provide ground support and groundwater control. The process involves freezing moisture in the pore spaces which acts as a cementing agent binding the soil particles together and providing structural support in the soil mass. Soil freezing is accomplished using a system of coolant pipes (typically 80 mm to 100 mm in diameter) that are arranged in a designed pattern and connected with a manifold. The soil freezing process moves radially away and along the length of the pipes and coalesces between pipes forming an impervious barrier sufficiently strong to be self-supporting. The system of coolant pipes typically extends above the ground surface and is connected to a manifold routed over the ground surface. It is possible to bury the manifold or place it in a shallow trench covered with steel plates. In either case, the manifold may need to be backfilled or buried 20181376.003A/SEA19R102863_Rev5 Page 22 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com with polyurethane insulation to prevent freezing and icing at the ground surface. The coolant typically consists of a chilled (approximately −20 to −40°C) calcium chloride or magnesium chloride solution that is circulated through the freezing pipe and typically requires 4 to 6 weeks to freeze the ground. Ground freezing is applicable to a range of subsurface conditions including clays, silts, sands, and gravels. In general, the soil conditions along South 3rd Street consist of sandy silts, silty sands, and sandy gravel which are suitable for ground freezing. It is envisioned that ground freezing tubes could be configured both a vertically and inclined in a “V” orientation at the base of the excavation to provide lateral support ground water cutoff in the excavation. Lateral support of soil pressures would likely be accomplished by creating a frozen soil gravity wall. 5.2.6.2 Trenchless Construction Methods Due to the relatively shallow groundwater levels at the site as well as the pipeline size and line and grade tolerances, microtunneling is considered the most appropriate potential trenchless method for the South 3rd Street corridor. Horizontal directional drilling cannot hold the required line and grade tolerances and is not recommended. Other trenchless methods such as jack and bore and pipe ramming are not recommended for this section either. Microtunnel boring machines (MTBM’s) are remotely operated and are steerable using laser guidance methods, so they can stay on line and grade better than most trenchless methods. They can also operate both above and below groundwater. The smallest feasible MTBM diameter is 24 inches, which would require upsizing the sewer main, or use of a larger MTBM and installation of a carrier pipe. Microtunneling requires the excavation of launching and recovery shafts at each end of the drive. A typical launching shaft is rectangular with a length of about 20 to 40 feet; the recovery shaft can often be shorter. Drive lengths for 24-inch-diameter pipe generally range from about 500 to 600 feet. The pits/shafts are typically excavated to just below the proposed pipe invert elevation and must be designed to be essentially watertight. A jet grout or soil cement block at the portals is normally needed to enable launching and recovering the MTBM without allowing wet soil and groundwater into the shafts. Similar to pipe jacking, the MTBM is advanced by a jacking frame and hydraulic rams in the launching shaft. Once the MTBM is launched, the jacking frame retreats and sections of jacking 20181376.003A/SEA19R102863_Rev5 Page 23 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com pipe are installed behind the MTBM and jacked forward sequentially until the MTBM and pipeline exits into the recovery shaft. Cobbles and boulders represent potential obstructions for microtunneling, as does wood / logs. If properly configured with a crusher chamber, MTBMs can typically handle cobbles up to about 1/3 the diameter of the MTBM. The effectiveness of these crusher chambers is affected by both the size, number of coarse clasts, their hardness and their strength. 5.3 DEMOLITION Demolition will include removal of existing asphalt and concrete pavement, potentially concrete sidewalks, curbs, and aboveground or underground utilities. During demolition activities, all excavations for demolished utility vaults, utility lines, or other purposes should be backfilled with compacted structural fill, as recommended herein. Existing pavement sections will need to be removed at the start of the planned utility excavations. The contractor should be prepared to remove a variety of pavement materials including layers / combinations of Hot Mix Asphalt pavement, Portland Cement Concrete pavement, and brick. Pavement sections generally consisted of 2 to 6 inches of Hot Mix Asphalt over aggregate base, fill material, or concrete pavement sections about 4 to 8 inches thick, and in two locations, brick pavement. Table 1 in Section 3.4.2 summarizes the pavement sections encountered in our explorations. Neat saw cuts should be required for the margins of all areas of pavement removal, and the extent of pavement removal should account for the planned construction activity, as well as the location of saw cut joints with respect to traffic lanes and wheel paths as outlined in City Standards. The allowed locations for pavement joints may be revised if a mill and overlay will be used to reduce cold joints and avoid locating surface joints in wheel paths. Excavations should be supported such that sloughing or undermining of soils supporting pavements or other infrastructure to remain does not occur. If undermining, settlement, or other loss of support occurs it will be necessary to remove additional pavement. This should be done at no cost to the City and with revised saw cut joints in locations determined by a representative of the City. 20181376.003A/SEA19R102863_Rev5 Page 24 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com During the course of our field exploration, we encountered a number of marked and unmarked utilities in the vicinity of our borings. Boring KB-5 in particular had a number of unmarked utilities encountered in our potholes at 3 to 4 feet bgs, which included what appeared to be a white 3-inch diameter PVC pipe and a rectangular concrete corridor (potential utility duct). Utilities that are to be replaced and are within the excavation area should be removed from the excavation area prior to the installation of new utilities. If required, utility duct demolition and cut off should be accomplished in a manner that prevents damage to the remaining structures and the ends should be sealed with concrete to prevent soil and water from entering the duct. If the duct must be breached to accommodate installation of other utilities, the breach should be sealed with a concrete mass poured into the duct or reinforced concrete slabs/walls. Concrete seals should be designed for a vertical earth pressure equivalent to that generated by a fluid with a unit weight of 125 pounds per cubic foot (pcf) and a lateral earth pressure of 65 pcf. Alternatively, ducts could be backfilled with Controlled Density Fill (CDF) also known as Controlled Low Strength Material (CLSM) provided the contractor is able to deliver the material in a manner that completely fills voids in the duct. CDF should conform to the requirements of Section 2-09.3(1)E Backfilling of the WSDOT Standard Specifications. 5.4 PAVEMENTS 5.4.1 Pavement Repairs / Restoration We understand the City has determined that pavements impacted by utility work will be repaired in accordance with the City of Renton 2018 Trench Restoration and Street Overlay Requirements. In our opinion these are appropriate requirements for the project. Saw cuts and/or grinding should extend a minimum of 1 foot beyond the trench edges and overlays in grinding areas should be a minimum of 2 inches thick. Other factors such as patch orientation, minimum patch widths, and proximity to travel lanes must also be accounted for in determining final repair extents in accordance with City requirements. In addition to accounting for the edges of trenches, final patching requirements should encompass and extend 1 foot beyond any additional areas affected by soil movement, settlement, or pavement damage. Additional pavement repairs that are required due to soil movement should be performed at no cost to the City. At the discretion of the engineer, a full lane-width or full street- width overlay may be required. 20181376.003A/SEA19R102863_Rev5 Page 25 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com We do not recommend performing a grind and overlay in areas where the existing asphalt is less than 4 inches thick as it becomes difficult to avoid damaging the remaining pavement with construction traffic and variations in grade and pavement thickness can inadvertently result in the milling process damaging or completely removing the pavement section. 5.4.2 New Pavement Sections We understand City of Renton standard sections will be used. Based on our review of the provided standard pavement details, the planned replacement section is a minimum of 6 inches of ½” PG 64-22 Hot Mix Asphalt overlying a minimum of 6 inches of crushed surfacing. This seems reasonable relative to the thicknesses of the existing pavement sections, which generally appear to be performing adequately. Given the variability of the existing pavement section thicknesses and materials, using a standard section for replacement in areas to be removed is recommended over requiring the contractor to match the existing sections encountered as construction progresses. 5.4.3 Pavement and Aggregate Materials and Workmanship Hot Mix Asphalt should conform to requirements of Section 5-04 of the WSDOT Standard Specifications. Aggregate base should conform to Section 9-03.9(3) Crushed Surfacing of the WSDOT Standard Specifications and be compacted to at least 95 percent of the Modified Proctor maximum dry density as determined by ASTM D1557 / AASHTO T180. 5.5 EARTHWORK 5.5.1 Trench and Manhole Subgrades Excavation for trenches and manholes should be done in a manner to minimize disturbance of subgrade soils that will remain in place. Where subgrade soils for manholes consist of predominantly granular material, it may be appropriate to compact soils with a plate compactor, jumping jack, or tamping of the excavator bucket to firm up subgrades. Disturbance of soils with high fines contents may require over-excavation and replacement with material conforming to Section 9-03.9(3) Crushed Surfacing of the WSDOT Standards, or other approved material. Utility trenches, particularly in areas below the static water table, may encounter soft subgrades. In many areas pipe bedding will be adequate to stabilize subgrade. Where excessively soft trench 20181376.003A/SEA19R102863_Rev5 Page 26 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com subgrade soils are encountered, a geotextile fabric conforming to the requirements of Section 9-33.2(1) Construction Geotextile for Soil Stabilization of the WSDOT Standard should be placed over the subgrade and a 1-foot thick layer 2-4 inch quarry spalls or material conforming to Section 9-03.9(3) Crushed Surfacing of the WSDOT Standards should be placed over the geotextile. In areas with very soft and weak subgrades it may be appropriate to mix the contents of a bulk sack of dry cement into the subgrade and allow it to begin to cure before placing geotextile fabric and rock. Edges of the fabric should overlap a minimum of 18 inches and the fabric should be placed flat over the subgrade with no excessive wrinkles or folds. The contractor should be prepared to utilize geotextile fabric at the direction of the geotechnical engineer. We recommend the contract documents include unit prices for furnishing and installation of geotextile stabilization fabric. 5.5.2 Weather Considerations During wet weather and in areas where the exposed subgrade may consist of moisture-sensitive soils (soils containing approximately more than 10 percent fines based on the fraction passing the ¾-inch sieve), the contractor should take measures to protect subgrade excavations once the geotechnical engineer has approved them. These measures could include, but are not limited to, placing a layer of crushed surfacing over the subgrade and/or keeping construction traffic off the subgrade. If additional over-excavation and material replacement is required because the subgrade was not protected, the cost of such additional work should be borne by the contractor. After a rainfall, construction equipment travel on the exposed site subgrade should be minimized until the soils have been allowed to dry sufficiently. Otherwise, traffic activity on the wetted subgrade will degrade the exposed materials and result in additional excavation of the disturbed materials. 5.5.3 Structural Fill Materials All fill placed below pavements, sidewalks, or structures such as catch basins should be considered structural fill. The on-site fill and native soils that will be excavated from utility trenches will generally be unsuitable for re-use as structural fill because they contain a high fines content and will be over their optimum water content and not readily compactable. In addition, the project site may not have room for temporary stockpiling of trench materials near the work areas. Therefore, we recommend the contract documents include a provision for import of structural fill 20181376.003A/SEA19R102863_Rev5 Page 27 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com and export of unsuitable soils with unit pricing. The suitability of on-site soils for re-use can be evaluated on a case-by-case basis during utility installation by a representative of Kleinfelder, if desired. Structural fill materials and bedding should conform to WSDOT/APWA standards, as well as City of Renton details. Pipe zone backfill placed within 6 inches of pipes should conform to the requirements of Section 9-03.12(3) Gravel Backfill for Pipe Zone Bedding of the WSDOT Standards, or manufacturer requirements. Imported structural fill should consist of material conforming to the requirements of Section 9-03.14(1) Gravel Borrow of the WSDOT Standards. Material placed within the pavement section should conform to the corresponding pavement section requirements. Materials should be imported to the site and protected or maintained so that they are not more than 3 percent over their optimum moisture content at the time of placement and compaction. The contractor should provide submittals as required by the contract documents. Once approved for use, the contractor should submit samples of import materials to the geotechnical engineer for evaluation and testing prior to use. The samples should be submitted at least 4 days prior to their use and sufficiently in advance of the work to allow the contractor to identify alternative sources if the material proves unsatisfactory. In some instances were several utilities cross in a small area and backfill cannot be readily worked and compacted around the utilities, it may be advantageous to backfill with controlled density fill (CDF). CDF, also known as Controlled Low Strength Material (CLSM), should conform to the requirements of Section 2-09.3(1)E Backfilling of the WSDOT Standard Specifications and we recommend the contract documents include a unit price for CDF backfill. Use of CDF should only be approved on a case-by-case basis by the engineer. 5.5.4 Structural Fill Placement and Compaction We understand that the WSDOT/APWA Standard Specifications will be used for this project. We recommend that laboratory compaction testing be performed based on the modified Proctor test method (ASTM D1557 / AASHTO T180) as opposed to the standard Proctor test method (ASTM D698 / AASHTO T99). The higher compaction standard of the modified Proctor is appropriate considering that extensive trenching will be performed through existing road sections and pavements that will not be totally reconstructed. Using the higher density standard will reduce the potential for differential settlement. 20181376.003A/SEA19R102863_Rev5 Page 28 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com Prior to placement and compaction, structural fill should be moisture conditioned to within 3 percent of the optimum moisture content. Fill should be placed in loose lifts with a maximum thickness of 8 inches and should be compacted to the following minimum relative compaction based on the modified Proctor test method (ASTM D1557): · Catch Basin/Structure/Manhole Foundations: 95 Percent · Pavement/Sidewalk Subgrades: 95 Percent · Trench Backfill: 95 Percent · Pipe Zone Bedding: 90 Percent (within 6 inches of pipe) In addition to meeting the above density requirements, all fill should be firm and unyielding when loaded. We recommend all structural fill compaction be observed and tested by a representative of the geotechnical engineer. 5.5.5 Construction Dewatering The contractor should be required to dewater soils prior to excavation of utility trenches that will be extended below the anticipated groundwater depth. The groundwater level should be maintained 2 feet below the trench bottom until at least two feet of backfill has been placed over the trench, and the groundwater should not be allowed to rise any higher than 2 feet below the level of trench backfill during the backfill operation. Excessive lowering of the groundwater table during construction, or on a long-term basis, can induce settlement of the observed soils within the project area and could result in damage to structures and utilities in the area if not properly managed. In general, we do not recommend lowering groundwater below Elevation 11 feet (NAVD 88), which represents about 10 feet of drawdown below seasonal low groundwater levels. However, it is the contractor’s responsibility to evaluate appropriate dewatering methods and drawdown levels along the alignment to prevent damaging settlements and/or migration of groundwater contaminants. The Table 3 presents estimated ground settlement due to groundwater drawdown below the observed seasonal low values documented in Table 2. The estimates are based on a generalized soil profile with approximately 13 feet of compressible soil. The upper bound estimate is based on very soft silt and the lower bound estimate is based on loose silty sand. Settlements will be less in areas where denser soils are present, and where the historically low groundwater levels are lower than the observed 2019-2020 seasonal low values. 20181376.003A/SEA19R102863_Rev5 Page 29 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com Table 3: Groundwater Drawdown and Estimated Settlement Groundwater Drawdown Below Seasonal Low (ft) Estimated Potential Settlement (in) 2 0.15 – 0.25 4 0.3 – 0.5 6 0.4 – 0.75 8 0.6 – 1.0 10 0.7 – 1.2 Sections 6 of this report covers potential groundwater contaminants and other environmental concerns that are relevant to dewatering. In general, some areas of the site will require groundwater that is removed to be stored or remediated on site due to contaminants; therefore, use of dewatering methods that limit flows are recommended. In addition, dewatering should be accomplished in a manner that does not spread contamination, which may preclude use of wells that have a large radius of influence, and in some instances, may limit use of dewatering methods that dewater from outside of the excavation. Section 7 of this report discusses dewatering in more detail. 5.6 CULVERT ACCESS MANHOLE 5.6.1 General We understand the City plans to add a manhole access structure to the existing concrete box culvert that runs below the intersection of Rainier Avenue South and SW Sunset Boulevard / South 3rd Street. Since details of the existing culvert construction and condition are unknown, the access structure is designed to be self-supporting and avoid imparting additional loads on the culvert. In order to accomplish this, the access structure foundation will consist of a reinforced concrete slab that spans over the top of the concrete culvert and extends about a foot beyond each side, including the integral pile caps. 20181376.003A/SEA19R102863_Rev5 Page 30 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 5.6.2 Deep Foundation Support Four-inch diameter steel pipe piles are a suitable foundation choice since they can be installed using a relatively small hammer mounted to an excavator. Larger diameter driven piles and auger-cast piles would require mobilization of a crane and would incur more costly mobilizations. Helical piles are an acceptable alternative, though they typically involve proprietary design by the manufacturer. We understand allowable loads (Allowable Stress Design) for each pile are estimated to be about 18.5 kips. An allowable axial compression capacity of 20 kips may be used for 4-inch diameter pipe piles installed and testing as discussed below. We anticipate that driven pipe pile foundations will provide adequate support with total settlements on the order of ½-inch or less. If a stricter settlement criterion is required, consideration should be given to selecting and revising terminal driving criteria based on load test results. Tensile and lateral capacity of the piles should be ignored in design calculations. The actual pile lengths will be determined during construction, based on the actual driving resistance. For cost estimating purposes, it may be appropriate to assume about 5 feet of penetration into the medium dense to dense native granular soils encountered at approximately Elevation 17 feet in boring KB-19. As such, it appears that an estimated average pile length of about 15 feet below the pile cap may be appropriate. We recommend the following: · All piles shall consist of 4-inch diameter Schedule-40 minimum, ASTM A-53 Grade “A” pipe, or better. · Piles shall be driven to refusal with a minimum 650-lb hydraulic hammer. The driving criteria will be determined based on the actual hammer size selected by the contractor, and a static load test program (see discussion in Item 4). · Piles shall be driven in nominal sections and connected with compression fitted sleeve couplers. · At least one (1) 4-inch pipe pile on each side of the culvert should be load tested. All load tests shall be performed in accordance with the procedure outlined in ASTM D1143. The maximum test load shall be 2 times the design load. The objective of the testing program is to verify the adequacy of the driving criteria and the efficiency of the hammer used for the project. 20181376.003A/SEA19R102863_Rev5 Page 31 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com · The geotechnical engineer-of-record or his/her representative shall provide full time observation of pile installation and testing. 5.7 CULVERT PENETRATION AND STRONGBACK We understand a minimum 30-inch diameter hole will be cut through the walls of an existing concrete box culvert in order to route the sanitary sewer through. This work is planned below the intersection of Rainier Avenue South and SW Sunset Boulevard / South 3rd Street. As part of this process, steel strongbacks will be anchored to the concrete culvert walls to strengthen them. For purposes of design, we recommend an at-rest lateral earth pressure equal to 65 pounds per cubic foot (pcf) equivalent fluid unit weight (EFW). Below the design groundwater level, buoyant soil unit weights can be used, resulting in an at-rest lateral earth pressure equal to 34 pcf EFW; hydrostatic pressures acting on the outside of the vault walls must be included with this reduced earth pressure. Groundwater was encountered at approximately Elevation 17 feet near this intersection in KB-19. We have not monitored groundwater levels in this area over time, nor are we aware of how “leaky” the culvert may be, or how water levels inside the culvert may relate to groundwater levels outside the culvert. Consideration should be given to the occurrence of a significant imbalance in hydrostatic pressures, with design groundwater levels outside of the culvert on the order of Elevation 20 to 25 feet. 5.8 MANHOLES Manholes are anticipated to be installed as deep as 30 feet below the existing ground surface. In general, the deeper the manhole, the more competent soils are anticipated to be at the manhole foundation level. Manholes should be placed, bedded, and backfilled in accordance with the manufacturer requirements and applicable WSDOT/APWA standards. In absence of manufacturer requirements for bedding, we recommend placing and compacting at least 6 inches of material conforming to Section 9-03.9(3) Crushed Surfacing of the WSDOT Standards to level and seat manholes. As requested, we provided the following minimum design parameters be used for manhole design. These pressures are based on the assumption that both compacted backfill and native soils will influence lateral earth pressures: 20181376.003A/SEA19R102863_Rev5 Page 32 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com · Soil Unit Weight: 130 pcf; · At-Rest Earth Pressures Coefficient, Ko: 0.50; · At-Rest Lateral Earth Pressure Above Groundwater Table: 65 pcf; · At-Rest Lateral Earth Pressure Below Groundwater Table: 96 pcf (includes hydrostatic pressure); and, · Design Depth of Groundwater Below Grade: 6 feet. Where applicable for non-yielding structures, a lateral uniform pressure of 125 psf should be used to account for traffic surcharge. 20181376.003A/SEA19R102863_Rev5 Page 33 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 6 ENVIRONMENTAL SCREENING AND FIELD INVESTIGATIONS ___________________________________________________________________________________ 6.1 DESKTOP ENVIRONMENTAL SCREENING During the desktop environmental review performed in 2017, which included a larger project area, we identified 57 regulated and non-regulated facilities with the potential to impact subsurface soil and/or groundwater within the boundaries of the original site. There are 24 regulated and non-regulated facilities with the potential to impact subsurface soils or groundwater within or adjacent to the reduced, current project footprint. Of these, 7 were ranked Risk Level #1 and 17 were ranked Risk Level #2. These facilities may have used, and/or stored, hazardous materials or petroleum products. Risk Level #1 facilities were defined in the desktop study as those facilities where evidence of a release to soils and/or groundwater has been reported in the regulatory records; however, the extent of those impacts beneath the roadways was not determined during the desk top study. Risk Level #2 facilities are those with the potential for soil or groundwater impacts based on current or former site use. A map showing the identified properties of environmental concern is included as Figure 3. Based on the relatively large project area and historical uses, it is also possible that one or more previously unidentified releases will be encountered during construction. Most of the identified current and historical facilities of concern used, and/or stored, petroleum hydrocarbons or chlorinated volatile organic compounds (solvents); therefore, these are the most likely contaminants to be encountered along the utility corridors. During installation of geotechnical boring/well MW-6 in April 2019, (located near 615 S 3rd Street), environmental impacts (petroleum hydrocarbons) were identified. The impacts were noted at 10 feet below ground surface, which was at the groundwater interface. We secured soil samples and delivered them to a third-party environmental testing laboratory; test results can be found in Appendix C. The groundwater gradient in the project area is toward the northwest, as measured in monitoring wells installed for the project. 20181376.003A/SEA19R102863_Rev5 Page 34 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 6.2 ENVIRONMENTAL FIELD INVESTIGATION – FALL 2019 6.2.1 Environmental Soil Screening of Geotechnical Explorations – Fall 2019 Soil samples collected during geotechnical borings were screened for apparent chemical and/or petroleum contamination by noting staining and odors and by field-screening using a photo-ionization detector (PID). Apparent petroleum-impacted soil was encountered in four of the borings, KB-1, KB-10, KB-11, and KB-14, drilled in September and October 2019. Figure 2A presents the soil boring locations. The soil impacts in all borings were generally encountered just above the water table, with depths ranging from 9 to 15 feet below ground surface (bgs). Kleinfelder selected up to 2 soil samples per boring, where PID readings indicated the highest contaminant impacts. The samples were placed in laboratory supplied sample jars and stored on ice until delivered to the lab for analysis. The soil samples were submitted to OnSite Environmental (OnSite) for initial analysis of total petroleum hydrocarbons (TPH) by method NWTPH-HCID to screen for various ranges of petroleum hydrocarbons (gasoline, diesel, and lube oil) and for total volatile organic compounds (VOCs) by EPA Method 8260. If the HCID screening identified the presence of petroleum hydrocarbons, the sample was then analyzed for quantification of Gasoline Range Organics (GRO) by method NWTPH-Gx and/or Diesel Range Organics (DRO) and Oil Range Organics (ORO) by method NWTPH-Dx as appropriate. 6.2.2 Monitoring Well Installation – Fall 2019 Monitoring wells were installed in each of the apparently impacted geotechnical borings (KB-1, KB-10, KB-11, and KB-14) during our October field investigation. The boring logs in Appendix A present the well-screen intervals and approximate groundwater depths. The wells were constructed with 2-inch diameter PVC pipe, with 10-foot to 20-foot well screens, backfilled with sand pack and a bentonite seal and completed at ground surface with traffic-rated flush mount manhole covers. Well construction details are included on the boring logs. The drill auger was decontaminated after drilling each impacted boring. The driller secured the cuttings and decontamination wash liquids in separate drums that were labelled and stored at a City designated location and were disposed of properly after testing was complete. 20181376.003A/SEA19R102863_Rev5 Page 35 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 6.2.3 Soil Analytical Test Results and IDW Disposal – Fall 2019 Petroleum hydrocarbons were reported by the laboratory in soil collected from four of the geotechnical borings (KB-1, KB-10, KB-11 and MW-6). TPH-GRO and/or TPH-ORO were detected at concentrations exceeding the Model Toxics Control Act (MTCA) cleanup regulation (Chapter 173-340 WAC) Method A cleanup levels. TPH-DRO was detected at concentrations below the Method A cleanup level. VOCs were not detected above regulatory levels. The soil sample analytical results for petroleum hydrocarbons that were detected in the soil samples are presented below: · TPH-GRO was detected at concentrations exceeding the MTCA Method A cleanup level of 100 milligrams per kilogram (mg/kg) in soil from borings KB-10, KB-11 and MW-6, and below the Method A level in KB-1. · TPH-DRO was detected in borings KB-1, KB-10 and KB-11 at concentrations below the MTCA Method A cleanup level of 2,000 mg/kg, and was below detectable concentrations in KB-14 and MW-6. · TPH-ORO was detected at a concentration exceeding the MTCA Method A cleanup level of 2,000 mg/kg in boring KB-1 and was below detectable concentrations in all other borings. · Total xylenes were detected at a concentration of 0.0.037 mg/kg, in boring KB-1 which is below the MTCA Method A cleanup level of 9 mg/kg. · Benzene, Toluene, Ethylbenzene, and Naphthalene were not detected in any samples above laboratory reporting limits. · Chlorinated hydrocarbons (solvents) were not detected in any samples above laboratory reporting limits. All of the VOC compounds detected are components of petroleum hydrocarbons. Appendix C presents the laboratory analytical reports and a summary of the soil analytical results in Table 4A. Investigation derived wastes (IDW) included five 55-gallon drum of soil cuttings and three drums of decontamination and/or slug test water. Disposal of the IDW at a licensed facility was required. Kleinfelder stored the IDW at a City designated location until testing was complete and the IDW was disposed of as non-hazardous waste at the Stericycle facility in Kent, Washington. 20181376.003A/SEA19R102863_Rev5 Page 36 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 6.3 ENVIRONMENTAL INVESTIGATION - DECEMBER 2019 In order to fill in data gaps from the fall 2019 environmental soil characterization, Kleinfelder proposed to advance five additional explorations (MW-9 through MW-13) as environmental probes in the roadways of South 2nd Street, Shattuck Street, and South 3rd Street. Figure 2A presents the environmental probe locations. The following presents the results of that supplemental investigation. 6.3.1 Environmental Soil Borings – December 2019 On December 16 and 17, 2019, five environmental geoprobe borings were advanced using a Geoprobe direct-push drill rig to a depth of approximately 25 feet bgs; with the exception of boring MW-10 which encountered refusal at 15 feet bgs. Soil samples were collected continuously during boring advancement and logged by an experienced staff geologist according to the Unified Soil Classification System (USCS). The soil samples were field screened for organic vapors using a photoionization detector (PID). The drilling equipment was decontaminated between each boring. No elevated PID readings or soil staining were noted, therefore soil samples were collected from the soil interval just above the observed water table. Chain of custody documents are provided with the laboratory analytical reports in Appendix C. The soil samples were submitted to OnSite Laboratory for analysis of volatile organic compounds (VOCs) by Environmental Protection Agency (EPA) Method 8260, total petroleum hydrocarbons (TPH) as gasoline-range organics (TPH-GRO) by Method NWTPH-Gx, TPH as diesel-range organics (TPH-DRO) and TPH as oil-range organics (TPH-ORO) by Method NWTPH-Dx, and total lead by EPA Method 6010D. 6.3.2 Groundwater Sampling - December 2019 On December 16 and 17, 2019, Kleinfelder collected four grab groundwater samples from the environmental geoprobe borings (MW-9 and MW-11 through MW-13) located on South 2nd Street, Shattuck Street, and South 3rd Street. Groundwater was encountered during drilling at approximately 10 to 11 feet bgs, with the exception of MW-10, which did not encounter groundwater to a depth of 15 feet bgs, where the boring was terminated due to drilling refusal. Upon completion of each soil boring, a groundwater sample was collected by connecting new, 20181376.003A/SEA19R102863_Rev5 Page 37 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com disposable tubing to a peristaltic pump and inserting the tubing through a temporary well, constructed of new, 1-inch, PVC pipe. Kleinfelder also collected groundwater samples from the four groundwater monitoring wells that exhibited soil contamination during the fall 2019 geotechnical investigation (KB-1, KB-10, KB-11, and MW-6). Prior to sampling each groundwater monitoring well, the total depth and depth to groundwater was measured to the nearest hundredth foot using a decontaminated electronic water level meter. Kleinfelder then removed three well casing volumes using a new disposable polyethylene bailer. The purge water from each well was collected in a 55-gallon drum, which has been staged at the Renton City Utilities facility. Groundwater samples were placed into laboratory-prepared sampling jars, labeled, placed on ice, and transported under chain-of-custody documentation to OnSite Laboratory. Chain of custody documents are provided in Appendix C. The eight groundwater samples were submitted for analysis of volatile organic compounds (VOCs) by EPA Method 8260, total petroleum hydrocarbons (TPH) as gasoline-range organics (TPH-GRO) by Method NWTPH-Gx and TPH as diesel-range organics (TPH-DRO) and TPH as oil-range organics (TPH-ORO) by Method NWTPH-Dx. 6.3.3 Soil Analytical Results - December 2019 No analytes were detected at concentrations above the laboratory reporting limits in soil samples collected from the additional environmental geoprobe borings MW-9, MW-10, MW-11, MW-12, and MW-13. The soil analytical results are summarized in Table 4A in Appendix C. 6.3.4 Groundwater Analytical Results – December 2019 No analytes were detected at concentrations above the laboratory reporting limits in groundwater samples collected from the additional environmental geoprobe borings MW-9, MW-11, MW-12, and MW-13. Petroleum hydrocarbon constituents exceeding the Washington Department of Ecology (WADOE) Method A cleanup levels were detected in the four groundwater monitoring wells sampled (KB-1, KB-10, KB-11, and MW-6). Groundwater monitoring wells KB-10, KB-11, and 20181376.003A/SEA19R102863_Rev5 Page 38 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com MW-6 are located along South 3rd Street, near Smithers Avenue as indicated on Figures 2 and 3. Groundwater monitoring well KB-1 is located on Lake Avenue, near the intersection with South 2nd Street. The groundwater analytical results are summarized in Table 4B included in Appendix C and are as follows: · TPH-GRO was detected in four groundwater samples, however, only KB-10, KB-11, and MW-6 contained concentrations of TPH-GRO which exceed the WADOE Method A cleanup level of 800 micrograms per liter (ug/L). TPH-GRO was reported at a concentration of 180 ug/L in the sample collected from soil boring MW-12. · TPH-DRO was detected in groundwater samples collected from two groundwater monitoring wells (KB-1 and MW-6). However, only the sample from MW-6 (1400 ug/L) exceeded the WADOE Method A cleanup level of 500 ug/L. TPH-DRO was reported at <3,400 ug/L and <4,300 ug/L in samples KB-10 and KB-11 respectively, which is above the WADOE cleanup level. The laboratory reporting limit was skewed high due to sample dilution. Therefore, while not detected, the concentrations of TPH-DRO in KB-10 and KB- 11 may exceed the WADOE Method A cleanup level of 500 ug/L. · TPH-ORO was detected in groundwater samples collected from two groundwater monitoring wells (KB-1 and MW-6), however, only the sample from KB-1 (1700 ug/L) exceeded the WADOE Method A cleanup level of 500 ug/L. · Benzene was not reported at concentrations exceeding the WADOE Method A screening level of 5 ug/L in any of the groundwater samples submitted for analysis. Benzene was reported above the laboratory reporting limit in groundwater samples collected from the KB-1 (0.21 ug/L), KB-10 (0.29 ug/L), KB-11 (1.0 ug/L), and MW-6 (3.1 ug/L). · Tetrachloroethene (PCE) and Trichloroethene (TCE) were not reported by the laboratory at concentrations which exceed the laboratory reporting limit in any of the samples submitted for analysis, with the exception of TCE in MW-13, which was reported at a concentration of 0.24 ug/L (the laboratory reporting limit is 0.20 ug/L for TCE). A copy of the laboratory analytical report from OnSite is provided in Appendix C. 20181376.003A/SEA19R102863_Rev5 Page 39 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 6.4 POTENTIAL SOURCES OF PETROLEUM IMPACTS Based on the depth of the identified soil contamination at the level of the water table, with no apparent impact visually identified higher in the boring, the contamination is likely in the capillary fringe, the layer in which groundwater seeps up from a water table by capillary action, and the contamination in this location is likely a result of contaminated groundwater in the area. Figure 3 identifies the impacted boring locations relative to the potential sources of subsurface contamination that were identified in our desktop study (Kleinfelder, 2018). Boring KB-1 is located approximately 150 feet east of a possible source of contamination, identified in our desktop study as site 27. Site 27 is listed as a Denny’s Restaurant where a leaking underground storage tank (UST) was reported in 2009 at 144 Rainier Ave. Borings KB-10 and KB-11 are located approximately 150- to 200 feet east of sites 35 and 106. Site 35 is Sound Mazda Suzuki, where a used oil UST and an unleaded gasoline UST were removed; no records of a release were included in the files reviewed. Site 106 includes the northeast, southwest, and southeast corners of 3rd Street and Burnett Avenue, where historical Sanborn maps for 1927, 1944, and 1962 identified properties with uses as auto sales, service, repair, gas and oil; there were no regulatory records of contaminant releases in the files reviewed. 6.5 CONCLUSIONS AND RECOMMENDATIONS 6.5.1 Environmental Sampling Conclusions Petroleum hydrocarbons were detected in soil in borings KB-1, KB-10, KB-11 and MW-6 above regulatory levels. The impacts were observed at depths ranging from approximately 9 to 15 feet, (at the groundwater interface), indicating the petroleum impacts likely migrated to the boring locations via groundwater. It is reasonable to conclude that the soil in the area surrounding these borings is also impacted. While the extent of contamination across the Site has not been fully characterized, in general, clean soils have been identified within 75 to 200 feet of the borings in which contamination was identified. If the future utility work in the area requires excavation to the depth of the impacted soil, which we understand will be the case, the impacted material should be segregated and disposed of at an appropriate disposal facility. 20181376.003A/SEA19R102863_Rev5 Page 40 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com Groundwater contaminated with petroleum hydrocarbons was reported in samples collected from groundwater monitoring wells KB-1, KB-10, KB-11 and MW-6. In general, the locations where petroleum hydrocarbon impacts to soil were observed also had petroleum impacts to groundwater. 6.5.2 Management of Impacted Soil and Groundwater Four locations were identified during this subsurface investigation within the utility improvements corridor that have petroleum hydrocarbon contaminants in soil and groundwater. The contractor should be required to prepare a contaminated soil and groundwater handling and management plan. The plan should describe how the contractor will handle and dispose of contaminated media in order to comply with applicable environmental regulations. Kleinfelder should review the plan as part of the submittal review process. 20181376.003A/SEA19R102863_Rev5 Page 41 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 7 DEWATERING EVALUATION ___________________________________________________________________________________ 7.1 GENERAL Groundwater is present within the project limits at depths as shallow as 9 feet below ground surface. Groundwater control through construction dewatering will be required for installation of some of the proposed utilities. Construction dewatering could include multiple methods of groundwater control, including but not limited to: · Open pumping, which involves the use of drains, sumps and ditches to collect groundwater and pump it from the excavation; · Pre-drainage, which involves the installation of wells or well-points (or other methods) to draw down the water table in advance of excavation; and, · Impermeable barriers, such as sheet piles, slurry walls, in-situ grouting and ground freezing to limit groundwater flow into an excavation, with one or more of the above methods employed within the excavation. The contractor will be responsible for selecting dewatering means and methods, including the type of dewatering system(s) employed; limiting groundwater drawdown to prevent settlement of existing utilities and structures, and migration of contaminants; and handling and disposal of contaminated groundwater. Hydraulic conductivity is the primary parameter governing groundwater flow and drawdown distance (radius of influence). Estimates of hydraulic conductivity developed from aquifer testing and grainsize analyses vary across the project alignment by several orders of magnitude. Due to the presence of contaminants and gravelly soils that may produce high dewatering flows, it will likely be necessary for the contractor to limit dewatering to the inside of the excavation for the sanitary sewer installations along Whitworth Avenue South, Morris Avenue South, and South 3rd Street, and/or utilize impermeable barriers, to limit flows and prevent contaminant migration. The following sections discuss our aquifer testing, grain size testing and analyses, and dewatering flow and radius of influence estimates for a hypothetical dewatering system in a utility trench of 20181376.003A/SEA19R102863_Rev5 Page 42 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 8 feet by 100 feet. The high and low anticipated flow estimates range 5 to over 4,000 gallons per minute (gpm) depending on location and assumed groundwater drawdown. 7.2 AQUIFER TESTING 7.2.1 Field Methods Aquifer testing, in the form of slug tests, was performed on October 14 and 15, 2019, on wells MW-3, MW-4, and MW-5. Kleinfelder developed each well immediately before aquifer testing to reduce borehole smear and increase the effectiveness of the hydrologic connection between the test well and the in-situ (natural) soil and groundwater conditions. The wells were developed using surge and bail methods followed by pumping until a minimum of 10 well volumes had been purged. Purge water was collected in drums and temporarily stored on site pending analytical results and then disposed of properly. Select well construction details with pre- and post- development groundwater levels are summarized below in Table 5. Table 5: Aquifer Testing Wells Construction Summary Test Well ID Total Depth (ft) Screened Interval (ft) Static Groundwater Depth at Time of Construction (ft) Static Groundwater Depth Post-Development (ft) MW-3 28 10-28 10 11.4 MW-4 20 10-20 11 11.6 MW-5 45 15-45 16 16.5 Total depth, screened interval and static groundwater depths below ground surface are approximate values A slug test is a relatively cost-effective and efficient manner to estimate hydraulic conductivity within the immediate vicinity of the test well. The solid-slug test is conducted when a solid object of known volume (a slug) is quickly lowered into (slug-in) or pulled out (slug-out) of a water column within a well, causing the water level inside the well to rise or fall, respectively. The water level is monitored and recorded over time until it returns to equilibrium or the original observed level. The aquifer response and recovery data are used to estimate aquifer properties and provide hydraulic conductivity estimates. For our slug testing, the solid slug was alternately lowered into the well (falling head test) and removed (rising head test) from the well to create a condition of groundwater disequilibrium. The 20181376.003A/SEA19R102863_Rev5 Page 43 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com groundwater level was monitored with a pressure transducer over time as water level returned to equilibrium. A minimum of three slug-in and three slug-out tests were performed in each well. In addition to the slug tests, select soil samples from recent geotechnical borings were collected and submitted to Kleinfelder’s soil and materials laboratory for grain size distribution analysis per ASTM D422. The laboratory test results were analyzed to develop hydraulic conductivity estimates at specific intervals for correlation to the aquifer testing (slug tests) hydraulic conductivity estimates. Appendix B presents the laboratory test results. 7.2.2 Analysis We evaluated slug test data to estimate hydraulic conductivity using the software program AQTESOLV, created by HydroSOLVE of Reston, Virginia. Slug test data was evaluated using the Bouwer-Rice (1976) straight line method. The resulting hydraulic conductivity estimates are summarized below in Table 6; expanded slug test evaluations are presented in Appendix D. Table 6: Hydraulic Conductivity Estimates from Slug Testing Well ID Slug In-1 Slug In-2 Slug In-3 Slug Out-1 Slug Out-2 Slug Out-3 Geometric Mean MW-3 2.67E-01 2.62E-01 2.08E-01 1.44E-01 1.42E-01 1.69E-01 1.92E-01 MW-4 8.08E-03 8.89E-03 9.79E-03 1.01E-02 6.38E-03 9.71E-03 8.72E-03 MW-5 2.65E-01 2.47E-01 3.06E-01 4.00E-02 3.31E-02 3.03E-02 9.64E-02 Hydraulic conductivity estimates in feet/minute The slug test provides an approximate hydraulic conductivity value over the screened section of the well. Estimated mean hydraulic conductivity values from slug test data from each well tested ranged from 8.72 x 10-3 feet/minute (ft/min) to 1.92 x 10-1 ft/min. Test wells MW-3 and MW-5 were primarily screened in sands and gravels, whereas test well MW-4 was primarily screened in clay and silt, resulting in a lower estimated hydraulic conductivity. 7.3 GRAIN SIZE DISTRIBUTION ANALYSIS Kleinfelder performed grain size distribution analysis to estimate hydraulic conductivity. Evaluations were performed on select geotechnical boring samples collected from the saturated 20181376.003A/SEA19R102863_Rev5 Page 44 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com zone (below first encountered groundwater) of each boring. The grain size distribution results were analyzed using the program HydrogeoSieveXL (Devlin, 2016). The program computes estimated hydraulic conductivity using 15 published methods. Grain size analysis results are presented Appendix B. The resulting conductivity estimates (only reported for the methods that met the qualification criteria) are summarized in Table 7. Table 7: Hydraulic Conductivity Estimates from Grain Size Analysis Boring ID Sample Depth (ft) Hydraulic Conductivity (ft/min) Low High Geometric Mean KB-01 20 1.66E-02 3.15E+00 1.18E-01 KB-01 15 5.17E-06 2.02E-01 3.91E-04 KB-02 10 4.86E-03 3.19E+01 8.00E-02 KB-03 15 1.83E-03 2.32E-01 3.03E-02 KB-03 20 1.35E-02 1.25E-01 2.97E-02 KB-04 20 2.29E-02 5.40E+00 1.84E-01 KB-06 20 8.72E-03 7.02E+00 1.04E-01 KB-07 20 1.37E-02 4.02E+00 1.12E-01 KB-08 20 6.03E-03 1.73E+00 5.03E-02 KB-09 15 2.99E-06 4.42E-02 3.96E-04 KB-10 20 1.85E-02 4.76E-01 6.94E-02 KB-10 25 9.81E-03 4.27E-01 5.00E-02 KB-10 15 1.42E-05 2.94E-01 2.08E-02 KB-11 20 1.28E-02 3.74E-01 4.96E-02 KB-12 15 1.11E-02 1.01E+02 1.72E-01 KB-13 20 8.56E-07 3.77E-02 4.00E-04 KB-14 15 3.53E-03 1.08E+00 3.20E-02 KB-14 20 3.51E-06 1.26E+00 5.40E-04 KB-15 15 2.99E-01 9.97E+00 2.25E+00 KB-16 15 2.04E-02 1.00E+00 1.07E-01 KB-17 15 7.41E-02 1.01E+00 2.47E-01 7.4 DISCUSSION OF SLUG TEST AND GRAIN SIZE DISTRIBUTION ANALYSIS RESULTS The slug test generally estimates hydraulic conductivity over the entire screened interval of the well. The displaced water returns to equilibrium radially with components of both horizontal and vertical flow. In comparison to grain size distribution analysis, the slug test is generally considered the more reliable means of estimating hydraulic conductivity due to the nature of the in-situ testing and the hydraulic effect over the entire screened interval with a radial flow. 20181376.003A/SEA19R102863_Rev5 Page 45 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com The grain size analysis estimates hydraulic conductivity only for the sample interval, which is typically 6 to 18 inches in length. Grain size analysis reflect conditions of the samples when retrieved from the borehole and can include disturbance compared to natural, in-situ conditions. The high and low hydraulic conductivity range values noted from the grain size analysis indicate hydraulic conductivity within the interval analyzed but does not account for differences in soil type outside of the sample interval (both laterally and vertically) or within the saturated zone, such as those that might be seen for example during the slug testing. In addition, the sampling and grain size testing procedure significantly alters the original physical texture (i.e., bedding, cementation, grading, etc.) of the soil. The range of hydraulic conductivity estimates from each method generally correlate with soil type. The highest values of hydraulic conductivity by each method (aquifer test and grain size analysis) are in the predominantly coarse-grained materials (sands and gravels) in MW-3 and borings KB-15, KB-17, and KB-4. The lowest values of hydraulic conductivity are in the predominantly fine-grained materials (silty clay) in MW-4 and borings KB-1, KB-9 and KB-13. This consistency across methods captures the lithological range of soils tested. The hydraulic conductivity values from both methods are generally consistent with the range of published typical hydraulic conductivity values for similar unconsolidated sediments (Fetter, 2001). 7.5 DEWATERING FLOW ESTIMATES 7.5.1 Model Basis and Assumptions We performed evaluations of groundwater flow conditions for South 3rd Street, South 2nd Street, Shattuck Avenue and Whitworth Avenue South. The higher- and lower-bound estimated hydraulic conductivities along each street alignment were used with a theoretical construction trench (dimensions of 8 feet wide by 100 feet long) to illustrate potential flow rates. We employed the following formula for estimating dewatering flow from the theoretical 100-foot long trench in an unconfined aquifer of specified thickness, where: Q = 7.48 π (K) (H2-h2)/ln(Ro/rs) + 2[x K (H2-h2)/ Ro)] And: Q = Flow in gallons per minute (gpm) K = Hydraulic Conductivity in feet/minute H = Aquifer thickness in feet 20181376.003A/SEA19R102863_Rev5 Page 46 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com h = Dewatered aquifer thickness in feet Ro = Radius of influence in feet rs = Effective radius of the dewatering system x = trench excavation length This calculation is an analytical model used to approximate flow with the following assumptions: · The well system is in equilibrium, meaning the pumping has continued until it has recharge equal to the discharge; · The well system is approximated as flow from one source (single point); · The aquifer is unconfined, homogenous, isotropic, of uniform thickness and extends horizontally in all directions; and, · The dewatering system is frictionless and fully penetrates the aquifer. Although the model treats the flow from a dewatered excavation as a single source, typical large dewatering systems will consist of multiple sources. Actual dewatering flows will vary from the calculated conditions based on several parameters, including but not limited to: · Depth to groundwater and amount of drawdown required; · Variations in aquifer lithology, thickness, isotropy, lateral extent and confinement; · Hydraulic conductivity; · Distance to recharge source; · Hydraulic boundaries: Positive (infiltration from precipitation, inundation or landscaping, seepage from surface bodies of water, etc.) or negative (leakage to surface bodies of water or connecting aquifers, aquitards [artificial or naturally occurring], etc.). Our evaluation is based upon our understanding of soil conditions, groundwater observations, and data analysis from aquifer testing and grain size distribution as described above. The evaluation is made from a limited set of data. 20181376.003A/SEA19R102863_Rev5 Page 47 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com The values for dewatering flow and radius of influence presented are shown for estimating purposes based on the limited data and may vary from actual construction conditions. Discharge rates (flows) are expected to be higher at the start of dewatering activities and decrease over time as pumping continues and the target water level is reached. In addition, our evaluation also did not factor in potential effects of a positive or negative recharge boundary since our scope of work did not include pumping tests or advanced groundwater modeling. A positive recharge boundary within the radius of influence of the dewatering system, such as infiltrating water or a nearby water source, could increase flow rates. It is assumed that the radius of influence extends evenly from the center of the well in all directions. The radius of influence of the dewatering system is a rough approximation made from several estimated and non-empirical aquifer parameters. If refinement of radius of influence is desired at sensitive locations, a pumping test should be conducted to more accurately define its extent. 7.5.2 Conceptual Dewatering Models For our conceptual dewatering models, the following values were used: · Unconfined aquifer thickness of 40 feet (assumed); · Construction trench dimensions of 8 ft wide by 100 ft long; · Drawdown of the aquifer 2 feet below the bottom of the deepest utility invert; · Specific yield of 0.15 (assumed); · Time required to reach equilibrium conditions is 12 hours (assumed); and · No positive or negative hydraulic boundaries (assumed). 7.5.3 Model Results Estimates for the highest and lowest dewatering flows and radius of influence for South 3rd Street, South 2nd Street, Shattuck Avenue and Whitworth Avenue South are summarized below in Table 8. These estimates are based on the parameters stated in our conceptual dewatering model for a dewatering system in a hypothetical utility trench of 8 feet by 100 feet, as well as the mean values for hydraulic conductivity. Presentation of the flow estimates for the hypothetical system 20181376.003A/SEA19R102863_Rev5 Page 48 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com does not imply that the modeled scenarios and/or dewatering approach necessary meets other dewatering criteria for the project such as drawdown limitations, settlement criteria, and/or impacts to contaminated soils and groundwater; these estimates are provided for information only. The high and low anticipated flow estimates range from approximately 20 to 1,000 gallons per minute (gpm) along South 3rd Street; 5 to 360 gpm along South 2nd Street; 435 gpm along Shattuck Avenue; and 190 to over 4,000 gpm along Whitworth Avenue. Table 8: Dewatering Flow Estimates for Hypothetical Trench Location Depth to Groundwater (ft) Invert Depth (ft) Assumed Drawdown (ft) Hydraulic Conductivity (ft/min) Flow Estimate (gallons per minute) Daily Flow (gallons per day) Radius of Influence Estimate (feet) South 3rd Street KB-12 11 19 10 1.72E-01 1,001 1,441,440 273 KB-13 11 19 10 4.00E-04 22 31,680 13 South 2nd Street KB-02 10 14 6 8.00E-02 361 519,840 186 KB-01 6 6 2 3.91E-04 5 7,200 8 Shattuck Avenue KB-17 10 11 3 2.47E-01 436 627,840 319 Whitworth Avenue South KB-15 13 16 5 2.25E+00 4,241 6,107,040 986 KB-14 11 15 6 3.20E-02 190 273,600 118 20181376.003A/SEA19R102863_Rev5 Page 49 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 8 LIMITATIONS ___________________________________________________________________________________ This geotechnical study has been prepared for the exclusive use of Murraysmith and the City of Renton for specific application to the proposed Downtown Utility Improvements Project. The findings, conclusions and recommendations presented in this report were prepared in accordance with generally accepted geotechnical engineering practice. No other warranty, express or implied, is made. The scope of services was limited to a background data review and the field exploration described in Section 1. It should be recognized that definition and evaluation of subsurface conditions are difficult. Judgments leading to conclusions and recommendations are generally made with incomplete knowledge of the subsurface conditions present due to the limitations of data from field studies. The conclusions of this assessment are based on our field exploration and laboratory testing programs, and engineering analysis. Kleinfelder offers various levels of investigative and engineering services to suit the varying needs of different clients. Although risk can never be eliminated, more detailed and extensive studies yield more information, which may help understand and manage the level of risk. Since detailed study and analysis involves greater expense, our clients participate in determining levels of service, which provide information for their purposes at acceptable levels of risk. The client and key members of the design team should discuss the issues covered in this report with Kleinfelder, so that the issues are understood and applied in a manner consistent with the owner’s budget, tolerance of risk and expectations for future performance and maintenance. Recommendations contained in this report are based on our field observations and subsurface explorations, limited laboratory tests, and our present knowledge of the proposed construction. It is possible that soil or groundwater conditions could vary between or beyond the points explored. If soil or groundwater conditions are encountered during construction that differ from those described herein, the client is responsible for ensuring that Kleinfelder is notified immediately so that we may reevaluate the recommendations of this report. If the scope of the proposed construction, including the estimated Traffic Index or locations of the improvements, changes from that described in this report, the conclusions and recommendations contained in this report are not considered valid until the changes are reviewed, and the conclusions of this report are modified or approved in writing, by Kleinfelder. 20181376.003A/SEA19R102863_Rev5 Page 50 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com Kleinfelder cannot be responsible for interpretation by others of this report or the conditions encountered in the field. Kleinfelder must be retained so that all geotechnical aspects of construction will be monitored by a representative from Kleinfelder. These services provide Kleinfelder the opportunity to observe the actual soil and groundwater conditions encountered during construction and to evaluate the applicability of the recommendations presented in this report to the site conditions. If Kleinfelder is not retained to provide these services, we will cease to be the engineer of record for this project and will assume no responsibility for any potential claim during or after construction on this project. If changed site conditions affect the recommendations presented herein, Kleinfelder must also be retained to perform a supplemental evaluation and to issue a revision to our original report. This report, and any future addenda or reports regarding this site, may be made available to bidders to supply them with only the data contained in the report regarding subsurface conditions and laboratory test results at the point and time noted. Bidders may not rely on interpretations, opinion, recommendations, or conclusions contained in the report. Because of the limited nature of any subsurface study, the contractor may encounter conditions during construction which differ from those presented in this report. In such event, the contractor should promptly notify the owner so that Kleinfelder’s geotechnical engineer can be contacted to evaluate those conditions. We recommend the contractor describe the nature and extent of the differing conditions in writing and that the construction contract include provisions for dealing with differing conditions. Contingency funds should be reserved for potential problems during construction. This report may be used only by the client and only for the purposes stated, within a reasonable time from its issuance, but in no event later than two years from the date of the report. Land use, site conditions (both on site and off site) or other factors may change over time, and additional work may be required with the passage of time. Any party, other than the client who wishes to use this report shall notify Kleinfelder of such intended use. Based on the intended use of this report and the nature of the new project, Kleinfelder may require that additional work be performed and that an updated report be issued. Non-compliance with any of these requirements by the client or anyone else will release Kleinfelder from any liability resulting from the use of this report by any unauthorized party and the client agrees to defend, indemnify, and hold harmless Kleinfelder from any claims or liability associated with such unauthorized use or non-compliance. 20181376.003A/SEA19R102863_Rev5 Page 51 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com 9 REFERENCES ___________________________________________________________________________________ Bouwer, H. and R.C. Rice (1976). A Slug Test Method for Determining Hydraulic Conductivity of Unconfined Aquifers with Completely or Partially Penetrating Wells, Water Resources Research, Volume 12 No. 3, June 1976 City of Renton Department of Community and Economic Development Trench Restoration and Street Overlay Requirements, Renton, Washington, February 16, 2018 City of Seattle DPD (2009), Directors Rule 10-2009, Small Diameter Pipe Piles (Pin Piles), December 14, 2009 Devlin, J.F. (2016). HydrogeoSieveXL, University of Kansas Earth Solutions NW LLC. (2014). Geotechnical Evaluation, Renton Heritage Apartments, South 2nd Street and Main Ave., Renton, Washington, September 11, 2014 Fetter, C.W.( 2001). Applied Hydrogeology, 4th Edition, Pearson, November 26, 2000 GeoDesign, Inc. (2016). Report of Geotechnical Engineering Services, City of Renton, Downtown Circulation Project – Phase 1, Main Avenue South and Bronson Way South, Renton Washington, January 14, 2016 Geotech Consultants, (2007). Inc., Geotechnical Engineering Study, Proposed Mixed-Use Building, 207-219 Main Avenue South, Renton, Washington, July 18, 2007 Jennifer Ott, (2012). Due to construction of Lake Washington Ship Canal, Lake Washington is lowered 9 feet beginning on August 28, 1916, and the Black River disappears, October 1, 2012 Soil & Environmental Engineers, (2011). Inc. Report of Geotechnical investigation, Lake Ave S. Storm System Project, Renton, Washington, S&EE Job No. 912, February 10, 2011. King County Flood Control District, (2010). Map 11-5 Liquefaction Susceptibility, May 2010 Washington Department of Natural Recourses Interactive Geologic Maps, Accessed October 15, 2019 20181376.003A/SEA19R102863_Rev5 Page 52 of 52 March 31, 2020 © 2020 Kleinfelder www.kleinfelder.com WSDOT (2020). Standard Specifications for Road, Bridge, and Municipal Construction, Publication Number M41-10 MW-9 MW-10 MW-11 MW-13MW-12 The information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information.CAD FILE: U:\Projects\CADD\CADD 2018\20181376\Renton_10-15-19\20181376_Renton.dwgPLOTTED: 1/17/2020 3:32 PM BY: dean fahrneyN DRAWN BY: PROJECT NO. CHECKED BY: REVISED: DATE: FIGURESITE VICINITY MAP20181376 DMF MB 11/2019 11/2019 1 CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON 02,000 2,0001,000 APPROXIMATE SCALE (feet) SOURCE:U.S.G.S. 7.5' Topographic series, Renton, Washington Quadrangle 2017. SITE VICINITY MAP CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON SITE EXPLANATION APPROXIMATE LOCATION OF FORMER BLACK AND CEDAR RIVERS FOR M E R C E D A R R I V E R FORMER LAKE WASHINGTON SHORE LINE FORMER BLACK RIVER FOFO SS W SSTTUGP UWT SD SD SD W SS SS SS SS SS SS SD SD SD SD W TWWT T T T SD SS SD SS SD SD SD T FO T P T W SD SD SS P FO TPT T PPPTBORE TPT TT T T T T PW P W W SS T T T P P PP P P P WPPWPPPP PPTVPT UGPT T TT T TT T T T T T T WW P PP W P P P P P T T W/TWO MOUNTED SIGNAL HEADS P W T T W P T T P TP P P T P P P PP UGPTTT T SS T T T W SS SS SS SS W W W W W T PPPTT PTPPTPPSS W WP PTPTPT TT SS SS SS SS SS W SS SS SS SS SS SS SS PPTPPPP PPPTPPPTTPTPPPTSS W W SD W WPWWPPPPT PWPWW 12''W DI W WW12''W DI 12''W DI 12''W DI W 12''W CIWP P P P P P P P P P P P P P W W P P P P P TT PW WT SS WT T T T SSSS W TVSS T SS SS SS P T T SS SS SS BARKTVP P P T FO P T P P T PPPW T T SD SD WSSPPPTTTCB 30024RIM 43.10IE 38.7 NE, 6" CONCIE 38.5 SW, 6" CONC CB 30025RIM 43.27IE 41.7 NE, 6" IRON CB 30166RIM 43.10IE 42.0 NE, 6" CONC FF=45.44 BARK 8' BUS SIGN PTBARK BARK W W W T W W PPTWUGPWTPPW TT PPW PPSSPPPPPTTTPPPSS SS 12"CI W12"DI W WATERWATER16"D I W 24"DI W 4"W MW-6 MW-8 MW-2 MW-1 MW-4 MW-3 MW-5MW-5 MW-6MW-4 MW-3 MW-1 MW-8 KB-18 KB-17 KB-16 KB-2 KB-3 KB-4 KB-5 KB-6 KB-7 KB-8 KB-9 KB-10 KB-11 KB-12 KB-13 KB-15 KB-14 MW-9 MW-10 MW-11 MW-13 KB-19 KB-20 MW-2 KB-1 MW-12 CAD FILE: U:\Projects\CADD\CADD 2018\20181376\Renton_10-15-19\20181376_Renton.dwg LAYOUT: ExplorPLOTTED: 1/20/2020 10:20 AM BY: dean fahrneyFIGURE DRAWN BY DATE: PROJECT: CHECKED BY REVISED: SITE AND EXPLORATION PLAN CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON 20181376 DMF MB 11/2019 01/2020 2AThe information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information. N 0300 300150 APPROXIMATE SCALE (feet) LEGEND MONITORING WELLMW-8 HOLLOW-STEM AUGER BORINGKB-20 HOLLOW-STEM AUGER BORING CONVERTED TO MONITORING WELLKB-18 APPROXIMATE GEOTECHNICAL BORING LOCATIONS SITE AND EXPLORATION PLAN CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON APPROXIMATE LOCATION OF FORMER BLACK AND CEDAR RIVERS FORMER CEDAR RIVER FORM E R BLAC K RI V E R ENVIRONMENTAL GEOPROBE BORINGMW-13 IMPACTED SOIL AND WATER ENCOUNTERED IN BORING Based on 90 percent plans dated January 2020 provided by Murraysmith FOFO SS W SSTTUGP UWT SD SD SD W SS SS SS SS SS SS SD SD SD SD W TWWT T T T SD SS SD SS SD SD SD T FO T P T W SD SD SS P FO TPT T PPPTBORE TPT TT T T T T PW P W W SS T T T P P PP P P P WPPWPPPP PPTVPT UGPT T TT T TT T T T T T T WW P PP W P P P P P T T W/TWO MOUNTED SIGNAL HEADS P W T T W P T T P TP P P T P P P PP UGPTTT T SS T T T W SS SS SS SS W W W W W T PPPTT PTPPTPPSS W WP PTPTPT TT SS SS SS SS SS W SS SS SS SS SS SS SS PPTPPPP PPPTPPPTTPTPPPTSS W W SD W WPWWPPPPT PWPWW 12''W DI W WW12''W DI 12''W DI 12''W DI W 12''W CIWP P P P P PP P P P P P P P W W P P P P P TT PW WT SS WT T T T SSSS W TVSS T SS SS SS P T T SS SS SS BARKTVP P P T FO P T P P T PPPW T T SD SD WSSPPPTTTCB 30024RIM 43.10IE 38.7 NE, 6" CONCIE 38.5 SW, 6" CONC CB 30025RIM 43.27IE 41.7 NE, 6" IRON CB 30166RIM 43.10IE 42.0 NE, 6" CONC FF=45.44 BARK 8' BUS SIGN PTBARK BARK W W W T W W PPTWUGPWTPPW TT PPW PPSSPPPPPTTTPPPSS SS 12"CI W12"DI W WATERWATER16"D I W 24"DI W 4"W MW-6 MW-8 MW-2 MW-1 MW-4 MW-3 MW-5MW-5 MW-6MW-4 MW-3 MW-1 MW-8 KB-18 KB-17 KB-16 KB-2 KB-3 KB-4 KB-5 KB-6 KB-7 KB-8 KB-9 KB-10 KB-11 KB-12 KB-13 KB-15 KB-14 MW-9 MW-10 MW-11 MW-13 KB-19 KB-20 MW-2 KB-1 MW-12 CAD FILE: U:\Projects\CADD\CADD 2018\20181376\Renton_10-15-19\20181376_Renton.dwg LAYOUT: Explor (2B)PLOTTED: 1/20/2020 10:26 AM BY: dean fahrneyFIGURE DRAWN BY DATE: PROJECT: CHECKED BY REVISED: UTILITY ALIGNMENTS AND DEPTHS CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON 20181376 DMF MB 12/2019 01/2020 2BThe information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information. N 0300 300150 APPROXIMATE SCALE (feet) MONITORING WELLMW-8 HOLLOW-STEM AUGER BORINGKB-20 HOLLOW-STEM AUGER BORING CONVERTED TO MONITORING WELLKB-18 MW-1 GW 9 SS 8 W 5 MW-2 GW 12 SS 9 KB-1 GW 6 SS 6 W 5 KB-16 GW 10 SS 11 SD 6 KB-18 GW 8 SD 12 MW-8 GW 7 SD 12 KB-17 GW 10 SD 11 MW-4 GW 10 SS 17 SD 9 KB-15 GW 13 SS 16 SD 10 W 5 MW-3 GW 10 SS 15 SD 11 W 14 KB-14 GW 11 SS 15 SD 5 W 14 KB-2 GW 10 SS 14 SD 6 W 5 KB-3 GW 11 SS 16 SD 6 W 5 MW-5 GW 15 SS 11 KB-4 GW 20 KB-5 GW 20 KB-6 GW 20 SS 7 SD 10 W 6 KB-7 GW 20 SS 6 SD 12 W 8KB-8 GW 18 MW-6 GW 7 SS 28 KB-9 GW 11 SS 22 KB-11 GW 12 SS 21 SD 5 KB-12 GW 11 SS 19 SD 6 KB-13 GW 11 SS 19 SD 8 W 5 KB-12 GW 12 SS 18 SD 8 W 5 BORING / MONITORING WELL APPROXIMATE SHALLOWEST DEPTH TO GROUNDWATER OBSERVED IN FEET APPROXIMATE DEEPEST DEPTH TO SANITARY SEWER INVERT IN FEET APPROXIMATE DEEPEST DEPTH TO STORM DRAIN INVERT IN FEET APPROXIMATE DEEPEST DEPTH TO WATER LINE INVERT IN FEET SPU CEDAR RIVER PIPELINE KC EASTSIDE RECEPTOR KB-10 GW 13 SS 21 SD 5 W 7 ENVIRONMENTAL GEOPROBE BORINGMW-13 CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON Based on 90 percent plans dated January 2020 provided by Murraysmith LEGEND APPROXIMATE GEOTECHNICAL BORING LOCATIONS IMPACTED SOIL AND WATER ENCOUNTERED IN BORING MW-13 GW 11 SS 11 SD 11 MW-12 GW 12 SS 9 SD 10 MW-11 GW 12 SS 11 SD 11 W 5 MW-9 GW 11 SS 8 W 5 KB-19 GW 15 SS 10 KB-20 GW 12 SS 35 MW-10 GW 6 SS 8 W 5 FOFO SS W SSTTUGP UWT SD SD SD W SS SS SS SS SS SS SD SD SD SD W TWWT T T T SD SS SD SS SD SD SD T FO T P T W SD SD SS P FO TPT T PPPTBORE TPT TT T T T T PW P W W SS T T T P P PP P P P WPPWPPPP PPTVPT UGPT T TT T TT T T T T T T WW P PP W P P P P P T T W/TWO MOUNTED SIGNAL HEADS P W T T W P T T P TP P P T P P P PP UGPTTT T SS T T T W SS SS SS SS W W W W W T PPPTT PTPPTPPSS W WP PTPTPT TT SS SS SS SS SS W SS SS SS SS SS SS SS PPTPPPP PPPTPPPTTPTPPPTSS W W SD W WPWWPPPPT PWPWW 12''W DI W WW12''W DI 12''W DI 12''W DI W 12''W CIWP P P P P P P P P P P P P P W W P P P P P TT PW WT SS WT T T T SSSS W TVSS T SS SS SS P T T SS SS SS BARKTVP P P T FO P T P P T PPPW T T SD SD WSSPPPTTTCB 30024RIM 43.10IE 38.7 NE, 6" CONCIE 38.5 SW, 6" CONC CB 30025RIM 43.27IE 41.7 NE, 6" IRON CB 30166RIM 43.10IE 42.0 NE, 6" CONC FF=45.44 BARK 8' BUS SIGN PTBARK BARK W W W T W W PPTWUGPWTPPW TT PPW PPSSPPPPPTTTPPPSS SS 12"CI W12"DI W WATERWATER16"D I W 24"DI W 4"W MW-2 MW-1MW-1 KB-3 KB-6 KB-7 KB-8 MW-11 MW-2 KB-1 C C' D' D' A A' BB' KB-16 MW-13 KB-19 MW-12 MW-8 MW-8 KB-18 KB-17 KB-2 MW-9 MW-10 MW-3MW-3 KB-15 KB-14 MW-6 MW-4 MW-6MW-4 KB-9KB-11KB-13 KB-20 KB-10KB-12 MW-5MW-5 KB-4 KB-5 CAD FILE: U:\Projects\CADD\CADD 2018\20181376\Renton_10-15-19\20181376_Renton.dwg LAYOUT: Explor (2C)PLOTTED: 3/27/2020 10:18 AM BY: dean fahrneyFIGURE DRAWN BY DATE: PROJECT: CHECKED BY REVISED: SITE AND EXPLORATION PLAN CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON 20181376 DMF MB 11/2019 01/2020 2CThe information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information. N 0300 300150 APPROXIMATE SCALE (feet) LEGEND MONITORING WELLMW-8 HOLLOW-STEM AUGER BORINGKB-20 HOLLOW-STEM AUGER BORING CONVERTED TO MONITORING WELLKB-18 APPROXIMATE GEOTECHNICAL BORING LOCATIONS CROSS-SECTION LOCATION MAP CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON APPROXIMATE LOCATION OF FORMER BLACK AND CEDAR RIVERS FORMER CEDAR RIVER FORM E R BLAC K RI V E R ENVIRONMENTAL GEOPROBE BORINGMW-13 IMPACTED SOIL AND WATER ENCOUNTERED IN BORING Based on 90 percent plans dated January 2020 provided by Murraysmith D D' CROSS-SECTION LOCATION !( !( !( !( !( !(!(!( !B<!B<!B<!B<!B<!!( !!( !!( !!( !!(!!( !!(!!(!!( !!( !!(!!( !!(!!(!!( !H !H !H !H !H!A!A!A!A!A!A!A39 24 31 13 30 44 5 25 98 3 18 45 50 28 14 10 35 40 27 26 34 32 21 8 37 49 3352 13 46 23 74 4217 43 19 42 11 4 34 54 38 41 101 7 45 78 85 6 41102 76104 105 106106106 48 12 36 47 57 51 41 29 KB-2 KB-3 KB-9 KB-4 KB-6 KB-8 KB-7KB-16 KB-15 KB-13 KB-12 KB-17 KB-5 KB-18 KB-14 KB-19 MW-9 MW-10 MW-11 MW-12 MW-13 MW-8 MW-5 MW-4 MW-2 MW-1 MW-3 The information included on this graphic representation has been compiled from a variety of sources and issubject to change without notice. Kleinfelder makes no representations or warranties, express or implied,as to accuracy, completeness, timeliness, or rights to the use of such information. This document is notintended for use as a land survey product nor is it designed or intended as a construction design document.The use or misuse of the information contained on this graphic representation is at the sole risk of the partyusing or misusing the information.www.kleinfelder.com PARCELS OF POTENTIAL EN VIRONMEN TALCONCERN AND ANALYTICAL RESU LTS CITY OF RENTONDOWNTOWN UTILITY IMPROVEMENTS PROJECTRENTON, WASHINGTON FIGURE 3 PROJECT: DRAWN: DRAWN BY: CHECKED BY: FILE NAME:Figure3.mxd 20181376 01/2020 KFH CH SALT LAKE CITY, UTFILE: L:\2018\20181376.003A - Renton DUIP Geotechnical Services\2.0 Technical Information\2.8 GIS600 0 600300³ APPROXIMATE SCALE (feet) NOTES:TPH-GRO = TOTAL PETROLEUM HYDROCARBONS - GASOLINE-RANGE ORGANICSTPH-DRO = TOTAL PETROLEUM HYDROCARBONS - DIESEL-RANGE ORGANICSTPH-ORO = TOTAL PETROLEUM HYDROCARBONS - OIL-RANGE ORGANICSSOIL CONCENTRATIONS IN mg/kg (MILLIGRAMS PER KILOGRAM)GROUNDWATER CONCENTRATIONS IN g/l (MICROGRAMS PER LITER) = NOT DETECTED AT OR ABOVE THE INDICATED QUANTITYBOLD = REPORTED CONCENTRATION EXCEEDS THE WASHINGTON DEPARTMENT OF ECOLOGY METHOD A SCREENING LEVEL < KB-1 Soi l GroundwaterTPH-GRO 93 < 100TPH-DRO 340 450TPH-ORO 2,600 1,700 KB-11 Soi l GroundwaterTPH-GRO 370 6 800TPH-DRO 150 < 4,300TPH-ORO < 56 < 230 KB-10 Soi l GroundwaterTPH-GRO 1,600 4,900TPH-DRO 120 < 3,400TPH-ORO < 55 < 230 MW-6 Soil Groundwate rTPH-GRO 320 2,100TPH-DRO < 440 1,400TPH-ORO < 140 240 MW-8KB-17 KB-18 MW-13 LEGEND !AMONITORING WELL !!(HOLLOW-STEM AUGER !H ENVIRONMENTAL GEOPROBE BORING !(PETROLEUM HYDROCARBONS DETECTED IN SOIL AT CONCENTRATIONSEXCEEDING ONE OR MORE OF THE WASHINGTON DEPT. OF ECOLOGYMETHOD A SCREENING LEVELSENVIRONMENTAL RECORDS SEARCH BOUNDARY (DIFFERENT THAN SITEBOUNDARY)REPORTED CONTAMINANT RELEASE SITE - INDICATES REPORTED RELEASETO SOIL OR GROUNDWATER WITH "OPEN" REGULATORY STATUS.SITE OF POTENTIAL ENVIRONMENTAL CONCERN - INDICATES CURRENT ORFORMER SITE USE OF POTENTIAL ENVIRONMENTAL CONCERN, ORREPORTED CONTAMINANT RELEASE WITH NO FURTHER ACTION STATUS BYREGULATORY AGENCY. !B<HOLLOW-STEM AUGER BORING CONVERTED TO MONITORING WELL -10 -5 0 5 10 15 20 25 30 35 40 45 -10 -5 0 5 10 15 20 25 30 35 40 45 BC= 2, 2, 3 WC= 13.9% BC= 1, 1, 3 WC= 18.2% BC= 3, 2, 1 WC= 15.2% LL= 26 PL= 19 PI= 7 BC= 1, 12, 6 WC= 72.3% -200= 56% BC= 16, 14, 12 WC= 8.8% -200= 3.2% BC= 8, 7, 7 WC= 15.4% -200= 35% BC= 16, 21, 31 WC= 16.8% ASPHALT SM ML SM ML SP GW SM SILTSTONE BC= 0, 0, 0 WC= 11.1% -200= 29% BC= 1, 0, 0 WC= 10.5% BC= 1, 0, 2 WC= 2.6% -200= 6.2% BC= 12, 12, 11 WC= 6.9% BC= 5, 6, 7 WC= 9.6% BC= 2, 1, 3 WC= 19.3% BC= 1, 1, 0 ASPHALT SM GP-GM SP ML BC= 0, 1, 3 WC= 27.1% LL= 0 PL= 0 PI= NP -200= 47% BC= 0, 1, 1 WC= 164.0% BC= 2, 6, 12 WC= 8.4% LL= 0 PL= 0 PI= NP -200= 14% BC= 9, 17, 18 WC= 3.9% BC= 4, 5, 6 WC= 5.8% LL= 0 PL= 0 PI= NP -200= 1.6% BC= 12, 21, 14 WC= 235.3% BC= 1, 0, 1 WC= 29.8% BC= 5, 8, 11 WC= 8.7% BC= 7, 19, 18 WC= 8.3% BC= 6, 20, 22 WC= 19.0% ASPHALT CONCRETE SM ML SM GW SM GP SP LL= 0 PL= 0 PI= NP -200= 26% LL= 0 PL= 0 PI= NP BC= 3, 4, 9 BC= 5, 12, 18 BC= 14, 20, 21 BC= 15, 14, 13 ASPHALT CONCRETE SM GP SM GP SP-SM GP BC= 1, 2, 3 WC= 18.4% BC= 0, 0, 0 WC= 28.7% LL= 0 PL= 0 PI= NP -200= 49% BC= 4, 5, 3 WC= 4.8% BC= 2, 1, 1 WC= 4.8% BC= 1, 1, 2 WC= 11.2% BC= 11, 20, 30 WC= 3.6% LL= 0 PL= 0 PI= NP -200= 5.8% BC= 8, 11, 14 WC= 9.4% BC= 16, 17, 23 WC= 6.8% ASPHALT SM SM SP-SM GW-GM WC= 7.6% BC= 4, 4, 3 BC= 4, 3, 7 WC= 25.4% BC= 3, 3, 4 WC= 20.7% BC= 50/4" WC= 13.5% BC= 50/3" WC= 16.9% ASPHALT GM SP-SM CL SILTSTONE BC= 7, 8, 10 WC= 7.0% BC= 4, 6, 1 WC= 11.4% BC= 1, 1, 0 WC= 37.2% BC= 2, 0, 1 WC= 10.7% BC= 4, 2, 2 WC= 6.8% WC= 112.6% BC= 1, 1, 1 WC= 27.5% BC= 4, 2, 1 WC= 22.7% BC= 4, 3, 3 WC= 17.2% BC= 7, 5, 2 WC= 19.3% BC= 13, 11, 12 WC= 14.9% TOPSOIL SM GP-GM SP 4 SUBSURFACE CROSS-SECTION NOTE: REFER TO INDIVIDUAL LOGS FOR DETAILED INFORMATION AND THE GRAPHIC LEGEND KEYS FOR GRAPHICAL SYMBOL INFORMATION.FIGURE A'A ELEVATION (feet)ELEVATION (feet)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_11X17 PROFILE]PLOTTED: 03/26/2020 04:40 PM BY: BROBrien KB-1 KB-2 KB-4 KB-5 KB-6 MW-1 MW-5 REVISED: - PROJECT NO.: 20181376 DATE: DRAWN BY: CHECKED BY:4A -15 -10 -5 0 5 10 15 20 25 30 35 40 -15 -10 -5 0 5 10 15 20 25 30 35 40 BC= 6, 7, 8 WC= 4.8% BC= 2, 7, 5 WC= 2.0% -200= 3.5% BC= 5, 6, 3 WC= 12.4% BC= 1, 2, 1 WC= 37.7% LL= 35 PL= 27 PI= 8 -200= 93% BC= 0, 0, 1 WC= 27.8% -200= 47% BC= 1, 1, 1 WC= 28.4% -200= 47% BC= 0, 0, 9 WC= 24.1% BC= 12, 13, 15 WC= 25.8% ASPHALT CLAYSTONE SM GW ML ML SM SP BC= 1, 1, 1 WC= 19.9% LL= 0 PL= 0 PI= NP -200= 57% BC= 2, 2, 2 WC= 20.5% BC= 1, 0, 0 WC= 33.8% BC= 0, 1, 1 WC= 20.7% LL= 0 PL= 0 PI= NP -200= 40% BC= 4, 6, 5 WC= 8.7% BC= 3, 5, 8 WC= 12.4% LL= 0 PL= 0 PI= NP -200= 6.2% BC= 5, 18, 30 WC= 15.0% ASPHALT CLAYSTONE SM ML ML SM SP SP-SM GP BC= 6, 4, 2 WC= 20.5% BC= 3, 1, 2 WC= 6.5% -200= 6.1% BC= 1, 0, 0 WC= 31.5% BC= 1, 1, 0 WC= 32.2% LL= 28 PL= 22 PI= 6 BC= 0, 0, 1 WC= 33.7% LL= 30 PL= 24 PI= 6 BC= 0, 0, 0 WC= 32.4% -200= 37.0% BC= 0, 0, 0 WC= 12.2% ASPHALT SM ML SP-SM ML SM SP GP BC= 1, 0, 1 WC= 40.4% BC= 0, 0, 0 WC= 42.0% BC= 0, 1, 0 WC= 78.0% LL= 0 PL= 0 PI= NP -200= 65% BC= 7, 9, 7 WC= 4.8% -200= 0.9% BC= 0, 5, 14 WC= 14.1% BC= 4, 5, 6 WC= 13.9% BC= 7, 15, 17 WC= 12.3% ASPHALT CONCRETE SM ML ML GW SM GP-GM BC= 3, 3, 2 WC= 17.9% BC= 2, 1, 2 WC= 16.4% LL= 0 PL= 0 PI= NP -200= 30% BC= 2, 2, 2 WC= 15.9% BC= 1, 0, 1 WC= 29.5% BC= 6, 14, 18 WC= 7.7% -200= 3.5% BC= 9, 16, 18 WC= 7.1% ASPHALT ML SM ML SP GP BC= 1, 3, 2 BC= 5, 7, 9 BC= 2, 2, 2 BC= 5, 4, 11 BC= 15, 25, 50/5" BC= 19, 21, 50/5" BC= 18, 22, 30 BC= 18, 24, 50/5" BC= 35, 50/4" BC= 50/5" WC= 12.4% LL= 0 PL= 0 PI= NP -200= 19% ASPHALT BASE ROCK (1) SP-SM SP GP-GM BC= 2, 4, 8 WC= 25.4% BC= 5, 6, 2 WC= 18.9% BC= 1, 1, 1 WC= 47.4% BC= 1, 1, 1 WC= 39.4% BC= 1, 2, 2 WC= 35.5% WC= 26.1% ASPHALT CONCRETE SM ML SM CL-ML ML SM BC= 17, 28, 22 WC= 1.1% BC= 2, 3, 3 BC= 2, 2, 3 BC= 2, 2, 3 ASPHALT GM SM SC-SM 1 SUBSURFACE CROSS-SECTION NOTE: REFER TO INDIVIDUAL LOGS FOR DETAILED INFORMATION AND THE GRAPHIC LEGEND KEYS FOR GRAPHICAL SYMBOL INFORMATION.FIGURE B'B ELEVATION (feet)ELEVATION (feet)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_11X17 PROFILE]PLOTTED: 03/26/2020 04:47 PM BY: BROBrien KB-9 KB-11 KB-13 KB-15 KB-16 KB-19 MW-4 MW-6 REVISED: - PROJECT NO.: 20181376 DATE: DRAWN BY: CHECKED BY:4B -5 0 5 10 15 20 25 30 35 -5 0 5 10 15 20 25 30 35 BC= 1, 0, 1 WC= 40.4% BC= 0, 0, 0 WC= 42.0% BC= 0, 1, 0 WC= 78.0% LL= 0 PL= 0 PI= NP -200= 65% BC= 7, 9, 7 WC= 4.8% -200= 0.9% BC= 0, 5, 14 WC= 14.1% BC= 4, 5, 6 WC= 13.9% BC= 7, 15, 17 WC= 12.3% ASPHALT CONCRETE SM ML ML GW SM GP-GM BC= 1, 1, 2 WC= 23.7% -200= 54% BC= 0, 0, 0 WC= 44.2% LL= 39 PL= 31 PI= 8 -200= 88% BC= 0, 0, 0 WC= 41.0% LL= 38 PL= 29 PI= 9 -200= 76% BC= 3, 5, 6 WC= 23.7% LL= 0 PL= 0 PI= NP -200= 8.2% BC= 2, 6, 10 WC= 11.8% -200= 1.0% BC= 3, 9, 10 WC= 6.0% BC= 9, 15, 16 WC= 7.2% BC= 15, 15, 15 WC= 117.3% ASPHALT ML ML SP-SM SP GP SP BC= 1, 1, 1 WC= 28.2% -200= 59% BC= 5, 2, 2 WC= 15.9% -200= 23% BC= 0, 1, 4 WC= 32.2% BC= 0, 1, 1 WC= 41.4% LL= 38 PL= 27 PI= 11 BC= 0, 0, 0 WC= 32.1% BC= 0, 0, 0 WC= 35.9% BC= 0, 1, 1 WC= 30.6% BC= 0, 0, 0 WC= 31.1% ASPHALT SM ML SM ML ML BC= 4, 2, 2 WC= 41.7% BC= 1, 2, 1 WC= 42.9% BC= 3, 5, 9 WC= 23.1% BC= 2, 10, 11 WC= 17.6% BC= 5, 9, 9 WC= 19.3% BC= 5, 10, 10 WC= 12.5% BC= 11, 14, 13 WC= 18.4% BC= 13, 17, 9 WC= 20.5% ASPHALT GM CL SC-SM SW-SM SP 1 SUBSURFACE CROSS-SECTION NOTE: REFER TO INDIVIDUAL LOGS FOR DETAILED INFORMATION AND THE GRAPHIC LEGEND KEYS FOR GRAPHICAL SYMBOL INFORMATION.FIGURE C'C ELEVATION (feet)ELEVATION (feet)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_11X17 PROFILE]PLOTTED: 03/26/2020 04:25 PM BY: BROBrien KB-15 KB-17 KB-18 MW-8 REVISED: - PROJECT NO.: 20181376 DATE: DRAWN BY: CHECKED BY:4C 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 BC= 0, 0, 0 WC= 11.1% -200= 29% BC= 1, 0, 0 WC= 10.5% BC= 1, 0, 2 WC= 2.6% -200= 6.2% BC= 12, 12, 11 WC= 6.9% BC= 5, 6, 7 WC= 9.6% BC= 2, 1, 3 WC= 19.3% BC= 1, 1, 0 ASPHALT SM GP-GM SP ML BC= 2, 2, 2 WC= 20.4% -200= 36% WC= 8.8% BC= 1, 1, 1 WC= 35.7% BC= 1, 1, 1 WC= 43.5% WC= 11.9% BC= 1, 1, 1 WC= 71.6% -200= 38% BC= 4, 3, 4 WC= 10.5% -200= 5.2% BC= 0, 0, 1 WC= 37.9% LL= 36 PL= 25 PI= 11 -200= 68% BC= 7, 9, 14 WC= 13.1% BC= 42, 30, 35 WC= 10.7% ASPHALT CONCRETE SM SM SP-SM ML GP BC= 1, 0, 1 WC= 40.4% BC= 0, 0, 0 WC= 42.0% BC= 0, 1, 0 WC= 78.0% LL= 0 PL= 0 PI= NP -200= 65% BC= 7, 9, 7 WC= 4.8% -200= 0.9% BC= 0, 5, 14 WC= 14.1% BC= 4, 5, 6 WC= 13.9% BC= 7, 15, 17 WC= 12.3% ASPHALT CONCRETE SM ML ML GW SM GP-GM BC= 1, 1, 1 WC= 30.5% BC= 6, 7, 5 WC= 15.0% BC= 11, 9, 8 WC= 16.9% BC= 4, 8, 11 WC= 15.9% BC= 5, 9, 17 WC= 20.0% ASPHALT SM CL SP-SM SP SW BC= 2, 4, 8 WC= 25.4% BC= 5, 6, 2 WC= 18.9% BC= 1, 1, 1 WC= 47.4% BC= 1, 1, 1 WC= 39.4% BC= 1, 2, 2 WC= 35.5% WC= 26.1% ASPHALT CONCRETE SM ML SM CL-ML ML SM 1 SUBSURFACE CROSS-SECTION NOTE: REFER TO INDIVIDUAL LOGS FOR DETAILED INFORMATION AND THE GRAPHIC LEGEND KEYS FOR GRAPHICAL SYMBOL INFORMATION.FIGURE D'D ELEVATION (feet)ELEVATION (feet)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_11X17 PROFILE]PLOTTED: 03/26/2020 05:23 PM BY: BROBrien KB-2 KB-14 KB-15 MW-3MW-4 REVISED: - PROJECT NO.: 20181376 DATE: DRAWN BY: CHECKED BY:4D The information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information.CAD FILE: Z:\CADD 2018\20181376\Renton_10-15-19\20181376_Renton.dwgPLOTTED: 3/26/2020 4:03 PM BY: jeff salaDRAWN BY: PROJECT NO. CHECKED BY: REVISED: DATE: FIGURE20181376 JDS MB 02/2020 02/2020 5 CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON SOURCE:King County Flood Control District Map 11-5, Liquefaction Susceptibility, May 2010 LIQUEFACTION SUSCEPTIBILITY MAP CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON AREA VIEW PROJECT AREA AREA VIEW NOT TO SCALE APPENDIX A FIELD EXPLORATION LOGS ___________________________________________________________________________________ A-1 APPENDIX CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON The report and graphics key are an integral part of these logs. All data and interpretations in this log are subject to the explanations and limitations stated in the report. Lines separating strata on the logs represent approximate boundaries only. Actual transitions may be gradual or differ from those shown. No warranty is provided as to the continuity of soil or rock conditions between individual sample locations. Logs represent general soil or rock conditions observed at the point of exploration on the date indicated. In general, Unified Soil Classification System designations presented on the logs were based on visual classification in the field and were modified where appropriate based on gradation and index property testing. Fine grained soils that plot within the hatched area on the Plasticity Chart, and coarse grained soils with between 5% and 12% passing the No. 200 sieve require dual USCS symbols, ie., GW-GM, GP-GM, GW-GC, GP-GC, GC-GM, SW-SM, SP-SM, SW-SC, SP-SC, SC-SM. If sampler is not able to be driven at least 6 inches then 50/X indicates number of blows required to drive the identified sampler X inches with a 140 pound hammer falling 30 inches. ABBREVIATIONS WOH - Weight of Hammer WOR - Weight of Rod _ SILTY SANDS, SAND-GRAVEL-SILT MIXTURES CLAYEY SANDS, SAND-GRAVEL-CLAY MIXTURES SW-SM CLAYEY SANDS, SAND-SILT-CLAY MIXTURES Cu 6 and 1 Cc 3 SC-SM Cu 4 and 1 Cc 3 <_ ORGANIC SILTS & ORGANIC SILTY CLAYS OF LOW PLASTICITY SILTS AND CLAYS (Liquid Limit less than 50) WELL-GRADED SANDS, SAND-GRAVEL MIXTURES WITH LITTLE OR NO FINES POORLY GRADED SANDS, SAND-GRAVEL MIXTURES WITH LITTLE OR NO FINES MH OH ML GC-GM COARSE GRAINED SOILS (More than half of material is larger than the #200 sieve)UNIFIED SOIL CLASSIFICATION SYSTEM (ASTM D 2487) < Cu 6 and 1 Cc 3 GP-GM GP-GC _ _ _ INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY, GRAVELLY CLAYS, SANDY CLAYS, SILTY CLAYS, LEAN CLAYS GRAPHICS KEY < > < < > WELL-GRADED GRAVELS, GRAVEL-SAND MIXTURES WITH LITTLE OR NO FINES POORLY GRADED GRAVELS, GRAVEL-SAND MIXTURES WITH LITTLE OR NO FINES WELL-GRADED GRAVELS, GRAVEL-SAND MIXTURES WITH LITTLE FINES WELL-GRADED GRAVELS, GRAVEL-SAND MIXTURES WITH LITTLE CLAY FINES POORLY GRADED GRAVELS, GRAVEL-SAND MIXTURES WITH LITTLE FINES POORLY GRADED GRAVELS, GRAVEL-SAND MIXTURES WITH LITTLE CLAY FINES SILTY GRAVELS, GRAVEL-SILT-SAND MIXTURES CLAYEY GRAVELS, GRAVEL-SAND-CLAY-SILT MIXTURES WELL-GRADED SANDS, SAND-GRAVEL MIXTURES WITH LITTLE CLAY FINES POORLY GRADED SANDS, SAND-GRAVEL MIXTURES WITH LITTLE CLAY FINES SW SW-SC POORLY GRADED SANDS, SAND-GRAVEL MIXTURES WITH LITTLE FINES Cu 4 and/ or 1 Cc 3> > INORGANIC SILTS AND VERY FINE SANDS, SILTY OR CLAYEY FINE SANDS, SILTS WITH SLIGHT PLASTICITY ORGANIC CLAYS & ORGANIC SILTS OF MEDIUM-TO-HIGH PLASTICITY INORGANIC CLAYS OF HIGH PLASTICITY, FAT CLAYS INORGANIC SILTS, MICACEOUS OR DIATOMACEOUS FINE SAND OR SILT INORGANIC CLAYS-SILTS OF LOW PLASTICITY, GRAVELLY CLAYS, SANDY CLAYS, SILTY CLAYS, LEAN CLAYS CL CL-ML _ _ _ GM GC GW GP GW-GM GW-GC _ _ _ CH CLAYEY GRAVELS, GRAVEL-SAND-CLAY MIXTURES GRAVELS WITH > 12% FINES > Cu 4 and 1 Cc 3 > Cu 6 and/ or 1 Cc 3 > CLEAN SANDS WITH <5% FINESGRAVELS (More than half of coarse fraction is larger than the #4 sieve)Cu 6 and/ or 1 Cc 3> < < SANDS WITH 5% TO 12% FINES SANDS WITH > 12% FINES WELL-GRADED SANDS, SAND-GRAVEL MIXTURES WITH LITTLE FINES Cu 4 and/ or 1 Cc 3> CLEAN GRAVEL WITH <5% FINES GRAVELS WITH 5% TO 12% FINES OL < > < < > SP SP-SM SP-SC SM SC <_< > STANDARD PENETRATION SPLIT SPOON SAMPLER (2 in. (50.8 mm.) outer diameter and 1-3/8 in. (34.9 mm.) inner diameter) CALIFORNIA SAMPLER (3 in. (76.2 mm.) outer diameter) SHELBY TUBE SAMPLER MODIFIED CALIFORNIA SAMPLER (2 or 2-1/2 in. (50.8 or 63.5 mm.) outer diameter) BULK / GRAB / BAG SAMPLE SAMPLER AND DRILLING METHOD GRAPHICS HOLLOW STEM AUGER SOLID STEM AUGER VANE SHEAR WASH BORING NQ CORE SAMPLE (1.874 in. (47.6 mm.) core diameter)FINE GRAINED SOILS(Half or more of material issmaller thanthe #200 sieve)SILTS AND CLAYS (Liquid Limit 50 or greater)SANDS (Half or more of coarse fraction is smaller than the #4 sieve)NOTES GROUND WATER GRAPHICS OBSERVED SEEPAGE WATER LEVEL (level after exploration completion) WATER LEVEL (level where first observed) WATER LEVEL (additional levels after exploration) DRAWN BY: CHECKED BY: DATE: REVISED: - PROJECT NO.: 20181376 gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LEGEND 1 (GRAPHICS KEY) USCS_NOR_WES]PLOTTED: 03/27/2020 11:41 AM BY: BROBrien CALIFORNIA SAMPLER (# blows/ft) MODIFIED CA SAMPLER (# blows/ft) SPT-N60(# blows/ft) A-2 APPENDIX CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON > 50 Medium (M) High (H) RELATIVE DENSITY (%) APPARENT DENSITY 30 - 50 10 - 30 4 - 10 <4 >60 35 - 60 12 - 35 5 - 12 <4 >70 40 - 70 15 - 40 5 - 15 CONSISTENCY <2 Moist The thread is easy to roll and not much time is required to reach the plastic limit. The thread cannot be rerolled after reaching the plastic limit. The lump or thread crumbles when drier than the plastic limit. It takes considerable time rolling and kneading to reach the plastic limit. The thread can be rerolled several times after reaching the plastic limit. The lump or thread can be formed without crumbling when drier than the plastic limit. 30 - 50 DESCRIPTION Strongly FIELD TEST Alternating layers of varying material or color with the layer less than 1/4-in. thick, note thickness. FIELD TEST Absence of moisture, dusty, dry to the touch Moderately Will not crumble or break with finger pressure Pocket Pen (tsf) Term of Use <5% With Modifier 5 to <15% 15% Trace <15% 15 to <30% 30% AMOUNT >30 Very Soft SOIL DESCRIPTION KEY DESCRIPTION Damp but no visible water Boulders Cobbles coarse fine Gravel Sand Fines GRAIN SIZE >12 in. (304.8 mm.) 3 - 12 in. (76.2 - 304.8 mm.) Fist-sized to basketball-sized 3/4 -3 in. (19 - 76.2 mm.) Thumb-sized to fist-sized 0.19 - 0.75 in. (4.8 - 19 mm.) Pea-sized to thumb-sized 0.079 - 0.19 in. (2 - 4.9 mm.)#10 - #4 0.017 - 0.079 in. (0.43 - 2 mm.) #200 - #40 coarse fine medium SIEVE SIZE APPROXIMATE SIZE Larger than basketball-sized>12 in. (304.8 mm.) 3 - 12 in. (76.2 - 304.8 mm.) 3/4 -3 in. (19 - 76.2 mm.) #4 - 3/4 in. (#4 - 19 mm.) Rock salt-sized to pea-sized #40 - #10 Sugar-sized to rock salt-sized 0.0029 - 0.017 in. (0.07 - 0.43 mm.) Flour-sized to sugar-sized Passing #200 <0.0029 in. (<0.07 mm.) Flour-sized and smaller DESCRIPTION Secondary Constituent is Fine Grained Secondary Constituent is Coarse Grained SPT - N60(# blows / ft) Soft Stiff Very Stiff Hard 2 - 4 4 - 8 8 - 15 15 - 30 Weakly Crumbles or breaks with handling or slight finger pressure Crumbles or breaks with considerable finger pressure UNCONFINED COMPRESSIVE STRENGTH (Qu)(psf) VISUAL / MANUAL CRITERIA <500 0.5 PP <1 1 PP <2 2 PP <4 4 PP >8000 4000 - 8000 500 - 1000 1000 - 2000 2000 - 4000 Rounded Subrounded Dry Wet Visible free water, usually soil is below water table Thumb will penetrate more than 1 inch (25 mm). Extrudes between fingers when squeezed. Thumb will penetrate soil about 1 inch (25 mm). Remolded by light finger pressure. Thumb will penetrate soil about 1/4 inch (6 mm). Remolded by strong finger pressure. Can be imprinted with considerable pressure from thumb. Thumb will not indent soil but readily indented with thumbnail. Thumbnail will not indent soil. Particles have nearly plane sides but have well-rounded corners and edges. Angular Particles have sharp edges and relatively plane sides with unpolished surfaces. DESCRIPTION Fissured Slickensided Blocky Lensed CRITERIA Stratified Laminated Fracture planes appear polished or glossy, sometimes striated. Alternating layers of varying material or color with layers at least 1/4-in. thick, note thickness. Breaks along definite planes of fracture with little resistance to fracturing. Cohesive soil that can be broken down into small angular lumps which resist further breakdown. Inclusion of small pockets of different soils, such as small lenses of sand scattered through a mass of clay; note thickness. Subangular Particles have smoothly curved sides and no edges. Particles are similar to angular description but have rounded edges. None Weak Strong No visible reaction DESCRIPTION CRITERIA A 1/8-in. (3 mm.) thread cannot be rolled at any water content.NPNon-plastic The thread can barely be rolled and the lump or thread cannot be formed when drier than the plastic limit.< 30Low (L) 85 - 100 65 - 85 35 - 65 15 - 35 <5 0 - 15 Very Dense Dense Medium Dense >50 Loose Very Loose FROM TERZAGHI AND PECK, 1948 LLDESCRIPTION FIELD TEST Some reaction, with bubbles forming slowly Violent reaction, with bubbles forming immediately DESCRIPTION FIELD TEST PP < 0.25 Medium Stiff 0.25 PP <0.5 PLASTICITYAPPARENT / RELATIVE DENSITY - COARSE-GRAINED SOIL MOISTURE CONTENTSECONDARY CONSTITUENT CEMENTATION CONSISTENCY - FINE-GRAINED SOIL FROM TERZAGHI AND PECK, 1948; LAMBE AND WHITMAN, 1969; FHWA, 2002; AND ASTM D2488 REACTION WITH HYDROCHLORIC ACID ANGULARITYSTRUCTURE GRAIN SIZE DRAWN BY: CHECKED BY: DATE: REVISED: - PROJECT NO.: 20181376 gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LEGEND 2 (SOIL DESC KEY)]PLOTTED: 03/27/2020 11:42 AM BY: BROBrien 2" SOLID SCHEDULE 40 PVC PIPE 2" SLOTTED SCHEDULE 40 PVC PIPE 10/20 SILICA SAND PACK ANNULUS FILLED WITH CONCRETE ANNULUS FILLED WITH BENTONITE CHIPS ANNULUS FILLED WITH 10/20 SILICA SAND 97 45 91 56 3.2 35 ASPHALT: 2.5 inch asphalt section Fill Silty SANDwith Gravel (SM): brown, moist, loose to medium dense approx. 4 inch cobbles in cuttings Sandy SILT (ML): brown, moist, soft to medium stiff, low to medium plasticity, trace fine gravel Alluvium Silty SAND(SM): brown, moist, loose, fine to medium-grained sand Sandy SILT (ML): gray, wet, soft, with back oily residue, low to medium plasticity, petroleum odor Gravelly SAND(SP): dark gray, wet, medium dense, fine to coarse sand, trace silt, petroleum odor Well-Graded GRAVEL with Sand (GW): gray, wet, medium dense, fine-grained sand, trace silt Silty SAND(SM): gray, wet, medium dense SILTSTONE: gray, moist, hard, semi-lithified, with light gray striations The monitoring well was terminated at approximately 31.5 ft. below ground surface. Boring was converted to a Monitoring Well on October 02, 2019 BC=2 2 3 BC=1 1 3 BC=3 2 1 BC=1 12 6 BC=16 14 12 BC=8 7 7 BC=16 21 31 26 7 GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 8.5 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 16" 10" 3" 18" 5" 16" 16" ML GW 13.9 18.2 15.2 72.3 8.8 15.4 16.8 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-3 MONITORING WELL LOG KB-1 MONITORING WELL LOG KB-1 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount monument in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48150° Longitude: -122.21550° Approximate Ground Surface Elevation (ft.): 28.9 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/02/2019 Clear, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)25 20 15 10 5 0 -5 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:53 AM BY: BROBrienSample Type 100 32 29 6.2 ASPHALT: 10 inch asphalt section Fill Silty SAND(SM): brown, moist, loose, fine to grained sand, trace gravel grades to very loose with iron-oxide mottling Alluvium Poorly-Graded GRAVEL with Silt and Sand (GP-GM): brown, moist, very loose, fine to coarse-grained sand becomes wet Gravelly SAND(SP): gray, wet, medium dense, fine-grained gravel, fine to coarse-grained sand, trace silt Sandy SILT with Gravel (ML): tan to brown, wet, very soft to soft The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 01, 2019. PID= 0.0 ppm PID= 0.3 ppm PID= 0.1 ppm PID= 0.1 ppm PID= 0.0 ppm PID= 0.0 ppm BC=0 0 0 BC=1 0 0 BC=1 0 2 BC=12 12 11 BC=5 6 7 BC=2 1 3 BC=1 1 0 GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 13 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 4" 4" 2" 6" 12" 3" NR GP-GM 11.1 10.5 2.6 6.9 9.6 19.3 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-4 BORING LOG KB-2 BORING LOG KB-2Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48118° Longitude: -122.21206° Approximate Ground Surface Elevation (ft.): 33.3 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/01/2019 Clear, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:54 AM BY: BROBrienSample Type 100 100 100 75 86 70 18 12 6.5 3.5 ASPHALT: 4.5 inch asphalt section CONCRETE: 6.5 inch concrete section Fill SILT with Sand (ML): brown, moist, soft, coarse to fine grained sand gravel in upper 2 feet Silty SAND(SM): brown, moist, loose, fine grained sand Alluvium Poorly-Graded SANDwith Silt and Gravel (SP-SM): gray, wet, loose to medium dense, coarse to fine grained sand Poorly-Graded SAND(SP): gray, wet, very loose to loose, fine grained sand, trace silt coarse sands / fine gravels, grades medium dense GRAVEL with Silt and Sand (GP-GM): gray, wet, dense, fine-grained gravel The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 10, 2019. PID= 1.3 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.1 ppm PID= 2.3 ppm Hydrometer PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm BC=0 1 2 BC=1 1 2 BC=2 2 3 BC=2 3 3 BC=1 7 12 BC=5 3 0 BC=2 5 9 BC=3 18 20 GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 13 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 18" 15" 16" 16" 8" 2" 7" 6" SM SP-SM SP 30.0 27.9 20.9 15.9 12.4 31.8 15.6 10.2 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-5 BORING LOG KB-3 BORING LOG KB-3Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48099° Longitude: -122.21065° Approximate Ground Surface Elevation (ft.): 33.1 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/10/2019 Clear Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. W. Rosso Hollow Stem AugerPlunge:-90 degrees Justin/Michael/Ryan Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 4 5 6 7 8 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:54 AM BY: BROBrienSample Type 97 60 39 47 14 1.6 ASPHALT: 4 inch asphalt section CONCRETE: 7 inch concrete section Fill Silty SANDwith Gravel (SM): brown, moist, loose to very loose, fine-grained sand gravel grades fine to coarse-grained SILT with Sand (ML): brown, moist, very soft, non-plastic Silty SAND(SM): brown, moist, very loose, fine grained sand trace gravel, grades to medium dense Alluvium Well-Graded GRAVEL with Sand (GW): brown, moist, medium dense to dense, fine-grained gravel, fine to coarse grained sand becomes wet sample obsrtucted by well preserved piece of wood, trace sand Silty SAND(SM): brown, wet, very loose, trace wood fragments Poorly Graded GRAVEL with Sand (GP): wet, medium dense, fine gravel PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 2.3 ppm PID= 0.0 ppm PID= 0.0 ppm BC=0 1 3 BC=0 1 1 BC=2 6 12 BC=9 17 18 BC=4 5 6 BC=12 21 14 BC=1 0 1 BC=5 8 NP NP NP NP NP NP 4" 18" 12" 11" 10" 12" 11" 8" SM SM GW 27.1 164.0 8.4 3.9 5.8 235.3 29.8 8.7 1 of 2 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-6 BORING LOG KB-4 BORING LOG KB-4Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48127° Longitude: -122.20685° Approximate Ground Surface Elevation (ft.): 39.7 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 9/26/2019 Clear, 60's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Justin/Michael/Ryan Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)35 30 25 20 15 10 5 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 4 5 6 7 8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:55 AM BY: BROBrienSample Type Poorly Graded GRAVEL with Sand (GP): wet, medium dense, fine gravel grades to dense Poorly Graded SANDwith Gravel (SP): wet, dense, medium to coarse-grained gravel, fine sand, trace silt The boring was terminated at approximately 46.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on September 26, 2019. PID= 0.0 ppm PID= 0.0 ppm 11 BC=7 19 18 BC=6 20 22 GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 20 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 6" 12" 8.3 19.0 2 of 2 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-7 BORING LOG KB-4 BORING LOG KB-4Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48127° Longitude: -122.20685° Approximate Ground Surface Elevation (ft.): 39.7 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 9/26/2019 Clear, 60's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Justin/Michael/Ryan Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)40 45 50 55 60 65 70ApproximateElevation (feet)0 -5 -10 -15 -20 -25 -30 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)9 10 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:55 AM BY: BROBrienSample Type 72 26 ASPHALT: 4 inch asphalt section CONCRETE: 8 inch concrete section Fill Silty SANDwith Gravel (SM): light brown, moist, loose, fine to medium-grained sand, air vac to 6 feet Poorly Graded GRAVEL with Silt and Sand (GP): brown, moist, loose, coarse grained gravels up to 4 inches in diameter, brick and wood fragments obsered while vac'ing Silty SAND(SM): gray, moist, medium dense, fine to medium-grained sand Poorly Graded GRAVEL with Silt and Sand: brown, moist, dense, coarse gravels, medium to coarse grained sand Poorly Graded SANDwith Silt and Gravel (SP-SM): brown, moist, dense Alluvium GRAVEL with Silt and Sand (GP): gray, wet, medium dense, possible siltstone chips above gravels The boring was terminated at approximately 21.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 19, 2019. PID= 3.4 ppm PID= 0.1 ppm PID= 0.1 ppm PID= 1.2 ppm BC=3 4 9 BC=5 12 18 BC=14 20 21 BC=15 14 13 NP NP NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 20 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 11" 8" 9" 8" SM 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-8 BORING LOG KB-5 BORING LOG KB-5Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48125° Longitude: -122.20459° Approximate Ground Surface Elevation (ft.): 43.1 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/19/2019 Rain, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Justin/Michael/Ryan Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)40 35 30 25 20 15 10 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)3 4 5 6 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:55 AM BY: BROBrienSample Type 100 40 49 5.8 ASPHALT: 12 inch asphalt section Fill Silty SANDwith Gravel (SM): dark gray, moist, loose, fine to medium-grained sand, medium to coarse-grained gravel Silty SAND(SM): brown, moist, very loose, fine-grained sand Poorly-Graded SANDwith Silt (SP-SM): gray, moist, loose, fine to medium-grained sand grades to light gray, very loose grades to light brown Alluvium Well-Graded GRAVEL with Silt and Sand (GW-GM): brown, moist, medium dense to dense fine to coarse-grained gravel, fine to coarse-grained sand, grades to medium dense gravel content increases, possible cobbles The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 07, 2019. PID= 1.3 ppm PID= 0.3 ppm PID= 0.0 ppm PID= 1.0 ppm PID= 0.5 ppm Hydrometer PID= 0.0 ppm PID= 0.5 ppm PID= 6.0 ppm BC=1 2 3 BC=0 0 0 BC=4 5 3 BC=2 1 1 BC=1 1 2 BC=11 20 30 BC=8 11 14 BC=16 17 23 NP NP NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 20 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 6" 13" 6" 3" 14" 6" 6" 2" SM GW-GM 18.4 28.7 4.8 4.8 11.2 3.6 9.4 6.8 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-9 BORING LOG KB-6 BORING LOG KB-6Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48149° Longitude: -122.20388° Approximate Ground Surface Elevation (ft.): 43.3 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/07/2019 Clear, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Justin/Michael/Ryan Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)40 35 30 25 20 15 10 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:55 AM BY: BROBrienSample Type 73 40 44 6.3 4.9 4.2 ASPHALT: 4 inch asphalt section Fill Silty SAND(SM): light brown, moist, loose, fine to medium-grained sand Poorly-Graded SANDwith Silt and Gravel (SP-SM): light brown, moist, loose, fine to medium-grained sand Alluvium Well-Graded GRAVEL with Sand (GW): light brown, moist, medium dense, medium to coarse-grained gravel gravel grades to fine grades fine to coarse-grained, becomes wet, dense Silty SAND(SM): light brown, wet, medium dense, fine to medium-grained sand, trace gravel gray-brown mottling, grades to very loose The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 08, 2019. PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm BC=7 3 4 BC=6 5 4 BC=3 12 17 BC=6 8 10 BC=12 13 13 BC=10 19 20 BC=7 6 5 BC=0 0 3 NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 20 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 12" 8" 8" 4" 9" 6" 8" 12" SP-SM GW GW 11.4 4.9 5.7 4.4 2.7 2.8 16.5 33.1 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-10 BORING LOG KB-7 BORING LOG KB-7Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48015° Longitude: -122.20274° Approximate Ground Surface Elevation (ft.): 47.1 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/08/2019 Light rain, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Justin/Michael/Ryan Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)45 40 35 30 25 20 15 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:56 AM BY: BROBrienSample Type 82 52 52 18 7.3 5.8 ASPHALT: 12 inch asphalt section FIll Silty SANDwith Gravel (SM): gray-brown, moist, very loose to loose, fine to medium-grained grades to trace gravel grades to brown, medium dense decreasing silt content, grades to loose Alluvium Poorly-Graded GRAVEL with Silt and Sand (GP-GM): brown, moist, loose, fine to medium-grained sand grades to dense grades to wet Poorly-Graded SANDwith Silt (SP-SM): gray-brown, wet, medium dense, fine to medium-grained grades to dense The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 08, 2019. PID= 0.7 ppm PID= 0.4 ppm PID= 1.5 ppm PID= 1.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm BC=4 1 1 BC=5 9 6 BC=1 3 2 BC=4 2 2 BC=2 2 2 BC=17 15 16 BC=11 12 10 BC=14 25 26 NP NP NP NP NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 23 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 12" 4" 12" 6" 8" 10" 6" 4" SM GP-GM GP-GM 22.4 21.4 14.8 5.7 4.2 3.2 20.9 10.9 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-11 BORING LOG KB-8 BORING LOG KB-8Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47972° Longitude: -122.20469° Approximate Ground Surface Elevation (ft.): 43.7 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/08/2019 Light rain, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Justin/Michael/Ryan Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)40 35 30 25 20 15 10 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:57 AM BY: BROBrienSample Type 44 100 3.5 93 47 47 ASPHALT: 4.5 inch asphalt section BRICK: 2 inch brick section Fill Silty SANDwith Gravel (SM): fine to coarse sand, fine gravels, sub-angular, tan to brown, moist, meidium dense Well-Graded GRAVEL with Sand (GW): tan to gray, moist, loose to medium dense Alluvium Sandy SILT (ML): brown, moist, medium stiff, low to medium plasticity SILT with Sand (ML): gray, moist, very loose, low to medium plasticity Silty SAND(SM): fine-grained, gray, wet, very soft, low to medium plasticity Poorly-Graded SAND(SP): gray, wet, loose to medium dense, fine to medium sand, 18" heave (redrilled with head of drilling mud) gravel conent increases The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on September 26, 2019. PID= 0.0 ppm PID= 0.2 ppm PID= 0.4 ppm PID= 0.4 ppm PID= 0.2 ppm PID= 0.6 ppm PID= 0.3 ppm PID= 0.4 ppm BC=6 7 8 BC=2 7 5 BC=5 6 3 BC=1 2 1 BC=0 0 1 BC=1 1 1 BC=0 0 9 BC=12 13 15 35 8 GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 13 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 7" 4" 11" 18" 18" 18" 14" 16" GW ML 4.8 2.0 12.4 37.7 27.8 28.4 24.1 25.8 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-12 BORING LOG KB-9 BORING LOG KB-9Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47972° Longitude: -122.20895° Approximate Ground Surface Elevation (ft.): 36.6 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 9/26/2019 Clear, 60's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)35 30 25 20 15 10 5 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:57 AM BY: BROBrienSample Type 2" SOLID SCHEDULE 40 PVC PIPE 2" SLOTTED SCHEDULE 40 PVC PIPE 10/20 SILICA SAND PACK ANNULUS FILLED WITH CONCRETE ANNULUS FILLED WITH BENTONITE CHIPS ANNULUS FILLED WITH 10/20 SILICA SAND 77 57 55 6.6 5.6 4.2 ASPHALT: 11 inch asphalt section Fill Silty SANDwith Gravel (SM): tan to brown, moist, loose to medium dense Sandy SILT (ML): fine to medium-grained, brown, moist, very soft to medium stiff trace rootlets, grades to very soft grades to dark brown, orange mottling SILT (ML): gray-brown, moist, very soft, medium plasticity Sandy SILT (ML): blue-gray, moist, very soft, gasoline odor Silty SAND(SM): blue-gray, moist, very soft, gasoline odor becomes wet Alluvium Poorly-Graded SANDwith Silt and Gravel (SP-SM): fine to medium-grained, gray, wet, medium dense Poorly-Graded SANDwith Gravel (SP): fine to coarse sand, fine gravel, gray, wet, medium dense to dense, trace silt Sandy GRAVEL (GP): gray, wet, medium dense to dense, trace silt The monitoring well was terminated at approximately 31.5 ft. below ground surface. Boring was converted to a Monitoring Well on September 30, 2019 BC=1 2 3 BC=1 3 3 BC=0 0 0 BC=1 1 2 BC=3 7 10 BC=4 7 8 BC=12 18 10 BC=14 22 14 NP NP NP NP NP NP NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 13.5 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 14" 18" 18" 15" 12" 18" 5" 6" ML SP-SM SP-SM SP 16.2 16.9 24.7 16.8 11.0 16.4 9.3 4.1 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-13 MONITORING WELL LOG KB-10 MONITORING WELL LOG KB-10 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount monument in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47972° Longitude: -122.20964° Approximate Ground Surface Elevation (ft.): 35.4 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 9/30/2019 Light rain, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)35 30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:58 AM BY: BROBrienSample Type 2" SOLID SCHEDULE 40 PVC PIPE 2" SLOTTED SCHEDULE 40 PVC PIPE 10/20 SILICA SAND PACK ANNULUS FILLED WITH CONCRETE ANNULUS FILLED WITH BENTONITE CHIPS ANNULUS FILLED WITH 10/20 SILICA SAND 100 82 57 40 6.2 ASPHALT: 6 inch asphalt section BRICK: 4 inch brick section (2 layers) Fill Silty SANDwith Gravel (SM): brown, moist, medium dense Sandy SILT (ML): moist, very soft to soft, with iron-oxide mottling grades to gray with orange mottling grades to gray-brown, orange mottling SILT (ML): orange-brown, moist, very soft, low to medium plasticity Silty SAND(SM): dark gray, moist, very loose, fine sand Alluvium Poorly-Graded SANDwith Gravel (SP): fine to coarse sand, fine gravel, gray, wet, loost to medium dense, trace silt gasoline odor in sample Poorly-Graded SANDwith Silt and Gravel (SP-SM): gray, wet, medium dense, medium to coarse sand, trace silt 12" heave Sandy GRAVEL (GP): wet, medium dense to dense, gravel inferred from drill-action/cuttings 4 ft heave - no sample obtained The monitoring well was terminated at approximately 30 ft. below ground surface. Boring was converted to a Monitoring Well on September 25, 2019 BC=1 1 1 BC=2 2 2 BC=1 0 0 BC=0 1 1 BC=4 6 5 BC=3 5 8 BC=5 18 30 NP NP NP NP NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 13 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 18" 18" 18" 16" 10" 12" 14" ML SM SP-SM 19.9 20.5 33.8 20.7 8.7 12.4 15.0 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-14 MONITORING WELL LOG KB-11 MONITORING WELL LOG KB-11 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount monument in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47972° Longitude: -122.21009° Approximate Ground Surface Elevation (ft.): 34.9 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 9/25/2019 Clear, 60's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:58 AM BY: BROBrienSample Type 75 33 10.0 4.8 ASPHALT: 6.5 inch asphalt section BRICK: 4 inch brick section (2 layers) Fill Silty SANDwith Gravel (SM) Sandy SILT (ML): brown, moist, soft to medium stiff, with trace gravel and organics Well-Graded SANDwith Silt and Gravel (SW-SM): fine to medium-grained, gray-brown, moist, medium dense, gravel content decreases SILT with Sand (ML): gray-brown, moist, very soft SILT (ML): tan, moist to wet, very soft, orange mottling Alluvium Well-Graded GRAVEL with Sand (GW): fine to coarse sand, coarse gravel, tan to gray, wet, medium dense Poorly Graded SANDwith Silt and Gravel (SP): medium to coarse-grained, gray, wet, medium dense 12" heave SILT with Sand (ML): blue-gray, wet, very soft, orange mottling in sample The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on September 27, 2019. PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.2 ppm PID= 0.0 ppm PID= 0.1 ppm PID= 0.0 ppm PID= 0.1 ppm BC=3 3 6 BC=6 9 14 BC=4 1 1 BC=0 1 1 BC=9 9 7 BC=5 10 9 BC=9 8 10 BC=2 0 0 NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 12 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 10" 2" 4" 18" 11" 2" 10" 13" SW-SM GW 22.1 11.7 28.0 32.1 6.5 21.0 6.8 33.9 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-15 BORING LOG KB-12 BORING LOG KB-12Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47976° Longitude: -122.21057° Approximate Ground Surface Elevation (ft.): 33.6 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 9/27/2019 Rain, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:59 AM BY: BROBrienSample Type 92 100 6.1 37.0 ASPHALT: 3 inch asphalt section Fill Silty SANDwith Gravel (SM): non-plastic to low plasticity, brown, moist, medium dense Sandy SILT (ML): brown, wet, soft Poorly-Graded SANDwith Silt (SP-SM): fine to medium-grained, gray, moist, soft, trace pebbly gravel Alluvium SILT (ML): non-plastic to low plasticity, blue-gray, moist, very soft becomes wet Silty SAND(SM): fine-grained, blue-gray, wet, very loose, with yellow mottling Poorly-Graded SAND(SP): gray, wet, very loose, 18" heave (redrilled with head of drilling mud) Sandy GRAVEL (GP): gray, wet, loose, drill-action/cuttings indicate gravels The boring was terminated at approximately 30 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on September 26, 2019. PID= 0.2 ppm PID= 0.0 ppm PID= 0.1 ppm PID= 0.0 ppm PID= 0.0 ppm Hydrometer PID= 0.1 ppm BC=6 4 2 BC=3 1 2 BC=1 0 0 BC=1 1 0 BC=0 0 1 BC=0 0 0 BC=0 0 0 28 30 6 6 GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 17 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 3" 16" 9" 8" 18" 18" NR SP-SM ML ML 20.5 6.5 31.5 32.2 33.7 32.4 12.2 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-16 BORING LOG KB-13 BORING LOG KB-13Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47973° Longitude: -122.21100° Approximate Ground Surface Elevation (ft.): 33.2 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 9/26/2019 Clear, 60's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 10:59 AM BY: BROBrienSample Type 2" SOLID SCHEDULE 40 PVC PIPE 2" SLOTTED SCHEDULE 40 PVC PIPE 10/20 SILICA SAND PACK ANNULUS FILLED WITH CONCRETE ANNULUS FILLED WITH BENTONITE CHIPS ANNULUS FILLED WITH 10/20 SILICA SAND 96 55 94 36 38 5.2 68 ASPHALT: 2 inch asphalt section CONCRETE: 7 inch concrete section Fill Silty SAND(SM): brown, moist, loose, trace gravels brown mottling Silty SAND(SM): fine-grained, brown to gray, moist, very loose with clay, moist to wet Alluvium Gravelly SANDwith Silt (SP-SM): gray, wet, loose Sandy SILT (ML): gray, wet, very soft, low to medium plasticity, fine to medium-grained sand Sandy GRAVEL (GP): fine to coarse-grained, gray, wet, medium dense grades to dense The monitoring well was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 10, 2019. BC=2 2 2 BC=1 1 1 BC=1 1 1 BC=1 1 1 BC=4 3 4 BC=0 0 1 BC=7 9 14 BC=42 30 35 36 11 GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 15 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 18" 12" 16" 18" 10" 8" 9" 10" SP-SM ML 20.4 8.8 35.7 43.5 11.9 71.6 10.5 37.9 13.1 10.7 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-17 MONITORING WELL LOG KB-14 MONITORING WELL LOG KB-14 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount monument in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48042° Longitude: -122.21195° Approximate Ground Surface Elevation (ft.): 32.6 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/10/2019 Clear, 40's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. W. Rosso Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:00 AM BY: BROBrienSample Type 100 22 65 0.9 ASPHALT: 4 inch asphalt section CONCRETE: 8 inch concrete section Fill Silty SAND(SM): gray-brown, moist, loose, trace gravel SILT (ML): gray-brown, moist, very soft, trace fine sand, low plasticity grades to gray Sandy SILT (ML): gray-brown, moist, very soft Alluvium Well-Graded GRAVEL with Sand (GW): gray-brown, moist, medium dense, medium to coarse-grained sand, fine gravel, trace silt becomes wet Silty SANDwith Gravel (SM): gray, wet, medium dense, fine to medium-grained gravel Sandy GRAVEL with Silt (GP-GM): gray, wet, medium dense, fine to medium-grained sand grades to dense The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 07, 2019. PID= 0.0 ppm PID= 0.5 ppm PID= 0.6 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm PID= 0.0 ppm BC=1 0 1 BC=0 0 0 BC=0 1 0 BC=7 9 7 BC=0 5 14 BC=4 5 6 BC=7 15 17 NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 13.5 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 18" 18" 14" 8" 4" 8" 7" ML GW 40.4 42.0 78.0 4.8 14.1 13.9 12.3 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-18 BORING LOG KB-15 BORING LOG KB-15Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47998° Longitude: -122.21205° Approximate Ground Surface Elevation (ft.): 33.2 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/07/2019 Clear, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. W. Rosso Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:00 AM BY: BROBrienSample Type 97 53 30 3.5 ASPHALT: 9.5 inch asphalt section Fill Sandy SILT (ML): brown, moist, medium stiff, concrete debris in cuttings grades to trace gravel Silty SAND(SM): tan to brown, moist, loose Sandy SILT (ML): brown, moist, very soft, with iron-oxide mottling, low to medium plasticity Alluvium Gravelly SAND(SP): fine to coarse-grained, gray, wet, medium dense to dense, trace silt Sandy GRAVEL (GP): dark gray, wet, dense, trace silt The boring was terminated at approximately 21.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 01, 2019. PID= 0.8 ppm PID= 1.7 ppm PID= 1.0 ppm PID= 1.0 ppm PID= 1.2 ppm PID= 1.3 ppm BC=3 3 2 BC=2 1 2 BC=2 2 2 BC=1 0 1 BC=6 14 18 BC=9 16 18 NP NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 13 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 10" 17" 14" 18" 13" 8" SM SP 17.9 16.4 15.9 29.5 7.7 7.1 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-19 BORING LOG KB-16 BORING LOG KB-16Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47978° Longitude: -122.21514° Approximate Ground Surface Elevation (ft.): 32.6 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/01/2019 Clear, 60's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:01 AM BY: BROBrienSample Type 95 99 57 54 88 76 8.2 1.0 ASPHALT: 8 inch asphalt section Fill Sandy SILT (ML): tan to gray, moist, soft becomes brown with iron-oxide mottling, non-plastic SILT (ML): tan to gray, moist, very soft, medium to high plasticity Alluvium Poorly-Graded SANDwith Silt (SP-SM): tan to brown, moist, medium dense, fine to medium sand becomes wet Poorly-Graded SANDwith Gravel (SP): tan to gray, wet, medium dense, trace silt Sandy GRAVEL (GP): tan to gray, wet, medium dense to dense, trace silt Gravelly SAND(SP): tan to gray, wet, dense, fine to medium gravels, trace silt The boring was terminated at approximately 31.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on October 03, 2019. PID= 2.4 ppm PID= 0.9 ppm PID= 2.5 ppm PID= 2.3 ppm Hydrometer PID= 3.0 ppm PID= 3.0 ppm PID= 3.0 ppm PID= 2.3 ppm BC=1 1 2 BC=0 0 0 BC=0 0 0 BC=3 5 6 BC=2 6 10 BC=3 9 10 BC=9 15 16 BC=15 15 15 39 38 NP 8 9 NP GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 13 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 18" 18" 16" 13" 13" 6" 4" 6" ML ML SP-SM SP 23.7 44.2 41.0 23.7 11.8 6.0 7.2 117.3 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-20 BORING LOG KB-17 BORING LOG KB-17Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47872° Longitude: -122.21341° Approximate Ground Surface Elevation (ft.): 32.4 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/03/2019 Clear, 60's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. B. O'Brien Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:01 AM BY: BROBrienSample Type 2" SOLID SCHEDULE 40 PVC PIPE 2" SLOTTED SCHEDULE 40 PVC PIPE 10/20 SILICA SAND PACK ANNULUS FILLED WITH CONCRETE ANNULUS FILLED WITH BENTONITE CHIPS ANNULUS FILLED WITH 10/20 SILICA SAND 95 97 59 23 ASPHALT: 6 inch asphalt section Fill Silty SANDwith Gravel (SM): brown, moist, loose Sandy SILT (ML): brown, moist, very soft, fine to medium-grained sand, non-plastic Silty SAND(SM): non-plastic to low plasticity, red-brown, moist, loose, fine to medium-grained sand Alluvium Sandy SILT (ML): dark gray, moist, very soft, fine-grained sand, low plasticity becomes wet, grades to medium plasticity Sandy SILT (ML): dark gray, wet, very soft, fine to medium-grained sand, low plasticity The monitoring well was terminated at approximately 31.5 ft. below ground surface. Boring was converted to a Monitoring Well on October 03, 2019 BC=1 1 1 BC=5 2 2 BC=0 1 4 BC=0 1 1 BC=0 0 0 BC=0 0 0 BC=0 1 1 BC=0 0 0 38 11 GROUNDWATER LEVEL INFORMATION: Groundwater observed at approximately 10 ft bgs during drilling GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 12" 12" 18" 10" 18" 18" 15" 18" ML 28.2 15.9 32.2 41.4 32.1 35.9 30.6 31.1 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-21 MONITORING WELL LOG KB-18 MONITORING WELL LOG KB-18 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount monument in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47707° Longitude: -122.21333° Approximate Ground Surface Elevation (ft.): 31.6 Surface Condition: Asphalt NAD83 Gregory DrillingDrilling Company: Drilling Method: Drilling Equipment: 10/03/2019 Clear, 60's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: CME-75 (truck-mounted) 8 inch in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Ryan/Justin Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:02 AM BY: BROBrienSample Type ASPHALT: 10 inch asphalt section BASE COURSE: 7 inch cement treated base Fill Poorly-Graded SANDwith Silt (SP-SM): brown, moist, loose to medium dense, trace sub rounded gravel, red/brown sandstone and yellow/red sandstone with gray ½ inch stratified layers up to 6 inches observed grades to yellowish brown Alluvium Poorly-Graded SANDwith Gravel (SP): dark gray, wet, medium dense to very dense higher fine sand content silt content increases GRAVEL with Silt and Sand (GP-GM): brownish gray grading to blue gray, wet, dense Air knifed and vacuumed to 5½ feet PID= 0.4 PID= 1.1 PID= 0.1 PID= 1.0 PID= 0.8 PID= 0.1 PID= 0.0 PID= 0.0 PID= 0.2 BC=1 3 2 BC=5 7 9 BC=2 2 2 BC=5 4 11 BC=15 25 50/5" BC=19 21 50/5" BC=18 22 30 BC=18 24 6" 6" 4" 5" 18" 10" 12" 15" 1 of 2 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-22 BORING LOG KB-19 BORING LOG KB-19Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.49600° Longitude: -122.21750° Approximate Ground Surface Elevation (ft.): 32 Surface Condition: Asphalt NAD83 Holocene DrillingDrilling Company: Drilling Method: Drilling Equipment: 12/12/2019 Light Rain, 40's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: Diedrich D-50 (track-mounted) 8 inch in. O.D. M. Evans Hollow Stem AugerPlunge:-90 degrees Alex Mcconn Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S1 S2 S3 S4 S5 S6 S7 S8 DATE: 12/20/2019 DRAWN BY: MAE REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:30 AM BY: BROBrienSample Type 64 19 GRAVEL with Silt and Sand (GP-GM): brownish gray grading to blue gray, wet, dense sand grades fine to medium auger grind, blue grey siltstone fragments in sampler Boring was terminated due to auger refusal at approximately 44.5 feet. PID= 0.0 PID= 0.1 50/5" BC=35 50/4" BC=50/5"NP NP GROUNDWATER LEVEL INFORMATION: Groundwater was observed at approximately 15 ft. below ground surface during drilling. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 15" 18"SM 12.4 2 of 2 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-23 BORING LOG KB-19 BORING LOG KB-19Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.49600° Longitude: -122.21750° Approximate Ground Surface Elevation (ft.): 32 Surface Condition: Asphalt NAD83 Holocene DrillingDrilling Company: Drilling Method: Drilling Equipment: 12/12/2019 Light Rain, 40's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: Diedrich D-50 (track-mounted) 8 inch in. O.D. M. Evans Hollow Stem AugerPlunge:-90 degrees Alex Mcconn Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)40 45 50 55 60 65 70ApproximateElevation (feet)-5 -10 -15 -20 -25 -30 -35 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)S9 S10 DATE: 12/20/2019 DRAWN BY: MAE REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:30 AM BY: BROBrienSample Type ASPHALT: 8 inch asphalt section BRICK: 12 inch brick section Fill Poorly-Graded SANDwith Silt (SP-SM): brownish red, moist, loose, fine to medium-grained sand Silty SAND(SM): gray, moist, loose, fine to medium-grained sand Alluvium SILT with Sand (ML): gray, wet, medium stiff, fine-grained sand, low plasticity higher sand content Poorly-Graded SANDwith Silt and Gravel (SP): dark gray, wet, medium dense to dense, coarse sand, fine to coarse subrounded gravels Air knifed and vacuumed to 6 feet PID= 1.8 PID= 2.9 PID= 0.3 PID= 0.4 PID= 0.1 PID= 1.0 PID= 1.1 PID= 0.2 PID= 0.1 BC=8 3 2 BC=2 2 2 BC=2 3 2 BC=2 2 3 BC=2 3 5 BC=2 15 11 BC=7 17 18" 3" 18" 10" 12" 10" 14" 1 of 2 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-24 BORING LOG KB-20 BORING LOG KB-20Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47966° Longitude: -122.20837° Approximate Ground Surface Elevation (ft.): 36 Surface Condition: Asphalt NAD83 Holocene DrillingDrilling Company: Drilling Method: Drilling Equipment: 12/13/2019 Clear, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: Diedrich D-120 (truck-mounted) 8 inch in. O.D. W. Rosso Hollow Stem AugerPlunge:-90 degrees Alex Mcconn Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)35 30 25 20 15 10 5 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)DATE: 12/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:30 AM BY: BROBrienSample Type 80 36 4.4 Poorly-Graded SANDwith Silt and Gravel (SP): dark gray, wet, medium dense to dense, coarse sand, fine to coarse subrounded gravels Silty SAND(SM): gray, wet, very dense, fine to medium fine sand, trace fine sub grouned gravels, low plasticity Poorly-Graded GRAVEL with Sand (GP): gray, wet, very dense, cobble fragments cobble fragments, lower sand content The boring was terminated at approximately 51.5 ft. below ground surface. Boring was backfilled with bentonite and patched with dyed concrete on December 13, 2019. PID= 0.0 PID= 0.0 PID= 0.0 34 BC=10 12 13 BC=12 50/6" BC=7 20 30 NP NP NP NP GROUNDWATER LEVEL INFORMATION: Groundwater was observed at approximately 12 ft. below ground surface during drilling. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 12" 1" 9" SM 14.1 7.5 2 of 2 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-25 BORING LOG KB-20 BORING LOG KB-20Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47966° Longitude: -122.20837° Approximate Ground Surface Elevation (ft.): 36 Surface Condition: Asphalt NAD83 Holocene DrillingDrilling Company: Drilling Method: Drilling Equipment: 12/13/2019 Clear, 50's Exploration Diameter: Hammer Type - Drop:140 lb. Auto - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: Diedrich D-120 (truck-mounted) 8 inch in. O.D. W. Rosso Hollow Stem AugerPlunge:-90 degrees Alex Mcconn Additional Tests/RemarksBlow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)40 45 50 55 60 65 70ApproximateElevation (feet)-5 -10 -15 -20 -25 -30 -35 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)DATE: 12/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:30 AM BY: BROBrienSample Type 2" SCH 40 Solid PVC Riser 2" SCH 40 Slotted 0.010 PVC Screen Portland Cement Grout Bentonite Chips Sand Pack Sand Pack 6 inches asphalt (FILL) Silty GRAVEL with Sand (GM): brownish grey, moist, boring utilized air knife until 5½ feet, soil identified by cuttings (FILL) Poorly Graded SANDwith Silt and Gravel (SP-SM): fine to medium-grained, brownish grey, moist, loose, gravels less than 1 inch in size (ALLUVIUM) Lean CLAYwith Sand (CL): low to medium plasticity, light brown, wet, medium stiff to stiff, 5 inch thick Silty Sand lense observed in sample (Alluvium) Interbedded Silty Sand layers observed in sample SILTSTONE with Sand: wet, very dense, layered grey to brown color, high drilling effort required, sample becomes grey, layering ends, higher sand content The monitoring well was terminated at approximately 25.5 ft. below ground surface. Monitoring Well installed to a depth of 25¼ feet. BC=4 4 3 BC=4 3 7 BC=3 3 4 BC=50/4" BC=50/3" GROUNDWATER LEVEL INFORMATION: Groundwater was not observed during drilling or after completion. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 18" 18" 15" 4" 3" 7.6 25.4 20.7 13.5 16.9 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-26 MONITORING WELL LOG MW-1 MONITORING WELL LOG MW-1 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount cap in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48112° Longitude: -122.21733° Approximate Ground Surface Elevation (ft.): 38.1 Surface Condition: Asphalt NAD83 BortecDrilling Company: Drilling Method: Drilling Equipment: 4/15/2019 Partly Cloudy Exploration Diameter: Hammer Type - Drop:140 lb. Cathead - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: EC 95 Track Rig 8 in. O.D. R. Satyamurthy Hollow Stem AugerPlunge:-90 degrees Carlos Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)35 30 25 20 15 10 5 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 4 5 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:03 AM BY: BROBrienSample Type 2" SCH 40 Solid PVC Riser 2" SCH 40 Slotted 0.010 PVC Screen Portland Cement Grout Bentonite Chips Sand Pack 5 inches asphalt (Alluvium) Sandy SILT (ML): fine-grained, non-plastic, brown, moist, medium stiff, boring utilized air knife to 7½ feet (Alluvium) Poorly Graded GRAVEL with Silt and Sand (GP-GM): fine to coarse-grained, greyish brown, moist, dense (Alluvium) Poorly Graded SANDwith Silt and Gravel (SP-SM): fine to medium-grained, grey, wet, loose The monitoring well was terminated at approximately 16.5 ft. below ground surface. Monitoring Well installed to a depth of 16½ feet BC=1 3 2 BC=18 23 16 BC=6 4 3 GROUNDWATER LEVEL INFORMATION: Groundwater was not observed during drilling or after completion. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 16" 12" 12" 29.6 4.8 14.7 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-27 MONITORING WELL LOG MW-2 MONITORING WELL LOG MW-2 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount cap in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48002° Longitude: -122.21738° Approximate Ground Surface Elevation (ft.): 32.5 Surface Condition: Asphalt NAD83 BortecDrilling Company: Drilling Method: Drilling Equipment: 4/15/2019 Clear Exploration Diameter: Hammer Type - Drop:140 lb. Cathead - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: EC 95 Track Rig 8 in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Carlos Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:04 AM BY: BROBrienSample Type 2" SCH 40 Solid PVC Riser 2" SCH 40 Slotted 0.010 PVC Screen Portland Cement Grout Bentonite Chips Sand Pack 5 inches asphalt (Alluvium) Silty SANDwith Gravel (SM): fine to coarse-grained, brownish grey, moist, trace cobbles in cuttings, 8 feet 8 inches removed via air vac (Alluvium) Lean CLAYwith Sand (CL): fine-grained, medium plasticity, brownish grey, wet, very soft (Alluvium) SANDwith Silt and Gravel (SP-SM): brownish grey, wet, medium dense rig chatter (Alluvium) Poorly Graded SANDwith Gravel (SP): fine-grained, rounded, brownish grey, wet, medium dense, trace silt (Alluvium) Well-Graded SAND(SW): brown to black, wet, medium dense, trace silt The monitoring well was terminated at approximately 30 ft. below ground surface. Monitoring Well installed to a depth of 30 feet BC=1 1 1 BC=6 7 5 BC=11 9 8 BC=4 8 11 BC=5 9 17 GROUNDWATER LEVEL INFORMATION: Groundwater was not observed during drilling or after completion. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 18" 18" 18" 18" 18" 30.5 15.0 16.9 15.9 20.0 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-28 MONITORING WELL LOG MW-3 MONITORING WELL LOG MW-3 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount cap in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48021° Longitude: -122.21197° Approximate Ground Surface Elevation (ft.): 32.6 Surface Condition: Asphalt NAD83 BortecDrilling Company: Drilling Method: Drilling Equipment: 4/16/2019 Cloudy Exploration Diameter: Hammer Type - Drop:140 lb. Cathead - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: EC 95 Track Rig 8 in. O.D. R. Satyamurthy Hollow Stem AugerPlunge:-90 degrees Carlos Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 4 5 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:04 AM BY: BROBrienSample Type 2" SCH 40 Solid PVC Riser 2" SCH 40 Slotted 0.010 PVC Screen Portland Cement Grout Bentonite Chips Sand Pack 3 inches asphalt 4 inches concrete (Fill) Silty SAND(SM): brown, moist (Fill) Sandy SILT (ML): medium plasticity, brown, moist, stiff, organics (Fill) Silty SAND(SM): brown, moist, stiff (Alluvium) (Alluvium) Silty CLAY(CL-ML): medium to high plasticity, grey, moist to wet, very soft, trace sand, wood fragments SILT (ML): grey, moist to wet, medium stiff (Alluvium) Silty SAND(SM): fine to medium-grained, sub-rounded, grey, wet, medium dense The monitoring well was terminated at approximately 21.5 ft. below ground surface. Monitoring Well installed to a depth of 21½ feet BC=2 4 8 BC=5 6 2 BC=1 1 1 BC=1 1 1 BC=1 2 2 GROUNDWATER LEVEL INFORMATION: Groundwater was not observed during drilling or after completion. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 12" 10" 18" 18" 18" 25.4 18.9 47.4 39.4 35.5 26.1 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-29 MONITORING WELL LOG MW-4 MONITORING WELL LOG MW-4 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount cap in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47978° Longitude: -122.21167° Approximate Ground Surface Elevation (ft.): 32.8 Surface Condition: Asphalt NAD83 BortecDrilling Company: Drilling Method: Drilling Equipment: 4/15/2019 Partly Cloudy Exploration Diameter: Hammer Type - Drop:140 lb. Cathead - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: EC 95 Track Rig 8 in. O.D. S. Lewis Hollow Stem AugerPlunge:-90 degrees Carlos Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)30 25 20 15 10 5 0 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 4 5 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:04 AM BY: BROBrienSample Type 2" SCH 40 Solid PVC Riser 2" SCH 40 Slotted 0.010 PVC Screen Portland Cement Grout Bentonite Chips Sand Pack grass/mulch over 12 inches of topsoil (Fill) Silty SANDwith Gravel (SM): dark brown, moist, very loose to medium dense trace organics trace organics wood stuck in sampler (Fill) Poorly Graded GRAVEL with Silt and Sand (GP-GM): brown, wet, loose Piece of wite PVC in sample rig chatter, gravels in cuttings (Alluvium) Poorly Graded SANDwith Gravel (SP): fine to coarse-grained, sub-angular, reddish brown, wet, very loose to loose, trace silt BC=7 8 10 BC=4 6 1 BC=1 1 0 BC=2 0 1 BC=4 2 2 BC=1 1 1 BC=4 2 1 BC=4 3 8" 4" 1" 2" 1" 4" 12" 12" NR 7.0 11.4 37.2 10.7 6.8 112.6 27.5 22.7 17.2 1 of 2 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-30 MONITORING WELL LOG MW-5 MONITORING WELL LOG MW-5 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount cap in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48151° Longitude: -122.20797° Approximate Ground Surface Elevation (ft.): 38.6 Surface Condition: Asphalt NAD83 BortecDrilling Company: Drilling Method: Drilling Equipment: 4/16/2019 Cloudy/Overcast Exploration Diameter: Hammer Type - Drop:140 lb. Cathead - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: EC 95 Track Rig 8 in. O.D. R. Satyamurthy Hollow Stem AugerPlunge:-90 degrees Carlos Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)35 30 25 20 15 10 5 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 4 5 6 7 8 9 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:05 AM BY: BROBrienSample Type (Alluvium) Poorly Graded SANDwith Gravel (SP): fine to coarse-grained, sub-angular, reddish brown, wet, very loose to loose, trace silt becomes dark brown The monitoring well was terminated at approximately 46.5 ft. below ground surface. Monitoring Well installed to a depth of 46½ feet 3 BC=7 5 2 BC=13 11 12 GROUNDWATER LEVEL INFORMATION: Groundwater was not observed during drilling or after completion. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 18" NR 19.3 14.9 2 of 2 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-31 MONITORING WELL LOG MW-5 MONITORING WELL LOG MW-5 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount cap in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.48151° Longitude: -122.20797° Approximate Ground Surface Elevation (ft.): 38.6 Surface Condition: Asphalt NAD83 BortecDrilling Company: Drilling Method: Drilling Equipment: 4/16/2019 Cloudy/Overcast Exploration Diameter: Hammer Type - Drop:140 lb. Cathead - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: EC 95 Track Rig 8 in. O.D. R. Satyamurthy Hollow Stem AugerPlunge:-90 degrees Carlos Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)40 45 50 55 60 65 70ApproximateElevation (feet)0 -5 -10 -15 -20 -25 -30 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)10 11 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:05 AM BY: BROBrienSample Type 2" SCH 40 Solid PVC Riser 2" SCH 40 Slotted 0.010 PVC Screen Portland Cement Grout Bentonite Chips Sand Pack 8 inches asphalt 6 inches of gravel subbase (Fill) Silty SANDwith Gravel (SM): sub-rounded, brown, moist, dense metal bolt observed in cuttings (Alluvium) Silty Clayey SAND(SC-SM): brown, wet, medium stiff strong petroleum odor becomes grey, strong petroleum odor The monitoring well was terminated at approximately 21.5 ft. below ground surface. Monitoring Well installed to a depth of 21½ feet BC=17 28 22 BC=2 3 3 BC=2 2 3 BC=2 2 3 GROUNDWATER LEVEL INFORMATION: Groundwater was not observed during drilling or after completion. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 3" 8" 18" NR 1.1 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-32 MONITORING WELL LOG MW-6 MONITORING WELL LOG MW-6 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount cap in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47974° Longitude: -122.20832° Approximate Ground Surface Elevation (ft.): 37.0 Surface Condition: Asphalt NAD83 BortecDrilling Company: Drilling Method: Drilling Equipment: 4/17/2019 Cloudy/Overcast Exploration Diameter: Hammer Type - Drop:140 lb. Cathead - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: EC 95 Track Rig 8 in. O.D. R. Satyamurthy Hollow Stem AugerPlunge:-90 degrees Carlos Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)35 30 25 20 15 10 5 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 4 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:05 AM BY: BROBrienSample Type 2" SCH 40 Solid PVC Riser 2" SCH 40 Slotted 0.010 PVC Screen Portland Cement Grout Bentonite Chips Sand Pack 6 inches asphalt 6 inches of gravel subbase (Alluvium) CLAYwith Sand (CL): fine-grained, medium plasticity, brown to grey in color, moist, soft, dark brown mottling (Alluvium) Silty Clayey SAND(SC-SM): brown, moist, medium dense, trace gravels (Alluvium) Silty SANDwith Gravel (SW-SM): fine-grained, sub-angular, brown, wet, medium dense becomes brown to black in color, fine to coarse grained (Alluvium) Poorly Graded SANDwith Gravel (SP): fine to medium-grained, dark brown, wet, medium dense The monitoring well was terminated at approximately 31.5 ft. below ground surface. Monitoring Well installed to a depth of 31½ feet BC=4 2 2 BC=1 2 1 BC=3 5 9 BC=2 10 11 BC=5 9 9 BC=5 10 10 BC=11 14 13 BC=13 17 9 GROUNDWATER LEVEL INFORMATION: Groundwater was not observed during drilling or after completion. GENERAL NOTES: The exploration location and elevation are approximate and were estimated by Kleinfelder. 12" 18" 10" 10" 6" 6" 12" 12" 41.7 42.9 23.1 17.6 19.3 12.5 18.4 20.5 1 of 1 LABORATORY RESULTS Lithologic Description PAGE: FIELD EXPLORATION APPENDIX A-33 MONITORING WELL LOG MW-8 MONITORING WELL LOG MW-8 MONITORING WELL CONSTRUCTION* Completion Method: Flush mount cap in concrete Dry Unit Wt. (pcf)Passing #4 (%)Passing #200 (%)Latitude: 47.47783° Longitude: -122.21323° Approximate Ground Surface Elevation (ft.): 29.0 Surface Condition: Asphalt NAD83 BortecDrilling Company: Drilling Method: Drilling Equipment: 4/18/2019 Cloudy Exploration Diameter: Hammer Type - Drop:140 lb. Cathead - 30 in. Logged By: Date Begin - End: Hor.-Vert. Datum: Weather: Drill Crew: EC 95 Track Rig 8 in. O.D. R. Satyamurthy Hollow Stem AugerPlunge:-90 degrees Carlos Blow Counts(BC)=Uncorr. Blows/6 in.Liquid LimitPlasticity Index(NP=NonPlastic)CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDepth (feet)5 10 15 20 25 30 35ApproximateElevation (feet)25 20 15 10 5 0 -5 Graphical LogSampleNumberRecovery(NR=No Recovery)USCSSymbolWaterContent (%)1 2 3 4 5 6 7 8 DATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [__KLF_BORING/TEST PIT SOIL LOG]PLOTTED: 03/27/2020 11:05 AM BY: BROBrienSample Type APPENDIX B GEOTECHNICAL LABORATORY TESTING ___________________________________________________________________________________ 0 10 20 30 40 50 60 0 10 20 30 40 50 60 70 80 90 100 110 ATTERBERG LIMITS LL PL PI Passing #200 0 Exploration ID Depth (ft.) 16 19 27 22 24 25 29 27 NM 93 NM NM 68 76 NM 10 10 10 15 20 7.5 - 9 10 CL-ML LIQUID LIMIT (LL)PLASTICITY INDEX (PI)CL or OL "U" LINEML or OL4 7 MH or OH "A" LINE CH or O H Sample Description KB-01 KB-09 KB-13 KB-13 KB-14 KB-17 KB-18 26 35 28 30 36 38 38 7 8 6 6 11 9 11 SANDY SILT SILT (ML) SILT SILT SANDY SILT (ML) SILT SANDY SILT TABLE Testing performed in general accordance with ASTM D4318. NP = Nonplastic NM = Not Measured City of Renton Downtown Utility Improvements Project Renton, Washington Chart Reference: ASTM D2487 DATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_ATTERBERG (ASTM)]PLOTTED: 12/26/2019 01:08 PM BY: WRossoFor classification of fine-grained soils and fine-grained fraction of coarse-grained soils. 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 1 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NM NP NP NP NP NM NP NP NP NP NM NP NP NP NM 1.882 NM 0.08 3.351 NM 0.269 NM NM 0.14 15 20 25 5 10 97 45 91 100 32 100 54 19 37.5 12.5 9.5 37.5 NM 1.1 NM NM NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 15 20 25 5 10 KB-01 KB-01 KB-01 KB-02 KB-02 KB-01 KB-01 KB-01 KB-02 KB-02 0.117 8.452 0.185 0.253 26.325 SANDY SILT (ML) WELL-GRADED GRAVEL with SAND (GW) SILTY SAND (SM) SILTY SAND (SM) POORLY GRADED GRAVEL with SILT and SAND (GP-GM) NM 1.56 NM NM 3.05 NM 31.40 NM NM 188.06 TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 56 3.2 35 29 6.2 NM 2.1 NM NM NM City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:53 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 2 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NP NP NP NM NP NP NP NP NM NP NP NP NP NM NM 0.11 0.163 0.333 0.249 NM NM NM 0.151 0.127 2.5 7.5 10 15 20 100 100 100 75 86 100 4.75 4.75 4.75 19 25 NM NM NM NM 2.6 Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 2.5 7.5 10 15 20 KB-03 KB-03 KB-03 KB-03 KB-03 KB-03 KB-03 KB-03 KB-03 KB-03 NM 0.201 0.274 1.435 0.511 SILT with SAND (ML) SILTY SAND (SM) SILTY SAND (SM) POORLY GRADED SAND with SILT and GRAVEL (SP-SM) POORLY GRADED SAND (SP) NM NM 1.44 0.51 0.95 NM NM 4.06 9.49 4.01 TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 70 18 12 6.5 3.5 NM NM NM NM 0.9 City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:54 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 3 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NP NP NP NP NP NP NP NP NP NP NP NP NP NP NM 0.256 2.726 0.1 NM NM NM 0.32 NM NM 5 10 20 2.5 5 97 60 39 72 100 100 79 90 9.5 19 37.5 75 4.75 NM NM NM NM NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 5 10 20 2.5 5 KB-04 KB-04 KB-04 KB-05 KB-06 KB-04 KB-04 KB-04 KB-05 KB-06 0.12 4.545 11.275 1.755 0.098 SILTY SAND (SM) SILTY SAND with GRAVEL (SM) WELL-GRADED GRAVEL with SAND (GW) SILTY SAND with GRAVEL (SM) SILTY SAND (SM) NM NM 2.06 NM NM NM NM 35.20 NM NM TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 47 14 1.6 26 49 NM NM NM NM NM City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:54 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 4 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NP NM NM NP NP NP NM NM NP NP NP NM NM NP 2.055 0.438 2.531 2.046 0.167 0.2 0.163 0.306 0.249 NM 20 5 10 20 2.5 40 73 40 44 82 93 100 87 90 91 25 19 25 25 25 0.8 NM NM NM NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 20 5 10 20 2.5 KB-06 KB-07 KB-07 KB-07 KB-08 KB-06 KB-07 KB-07 KB-07 KB-08 12.401 1.791 11.042 9.557 0.483 WELL-GRADED GRAVEL with SILT and SAND (GW-GM) POORLY GRADED SAND with SILT and GRAVEL (SP-SM) WELL-GRADED GRAVEL with SAND (GW) WELL-GRADED GRAVEL with SAND (GW) SILTY SAND with GRAVEL (SM) 1.70 0.66 1.89 1.76 NM 61.89 11.00 36.04 38.32 NM TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 5.8 6.3 4.9 4.2 18 5.0 NM NM NM NM City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:54 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 5 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NP NM NP NP NP NP NM NP NP NP NP NM NP NP 0.476 0.681 2.112 NM NM 0.105 0.162 0.296 NM NM 10 20 5 15 20 52 52 44 100 87 89 25 25 37.5 4.75 2 NM NM NM NM NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 10 20 5 15 20 KB-08 KB-08 KB-09 KB-09 KB-09 KB-08 KB-08 KB-09 KB-09 KB-09 6.33 6.674 9.579 0.1 0.112 POORLY GRADED GRAVEL with SILT and SAND (GP-GM) POORLY GRADED GRAVEL with SILT and SAND (GP-GM) WELL-GRADED GRAVEL with SAND (GW) SILTY SAND (SM) SILTY SAND (SM) 0.34 0.43 1.58 NM NM 60.17 41.21 32.41 NM NM TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 7.3 5.8 3.5 47 47 NM NM NM NM NM City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:55 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 6 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NP NP NP NP NP NP NP NP NP NP NP NP NP NP NM 0.431 0.337 0.559 NM NM 0.146 0.161 0.204 NM 2.5 15 20 25 2.5 77 57 100 100 100 90 2 19 19 25 4.75 NM NM 1.3 NM NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 2.5 15 20 25 2.5 KB-10 KB-10 KB-10 KB-10 KB-11 KB-10 KB-10 KB-10 KB-10 KB-11 0.086 1.371 0.716 5.439 0.082 SANDY SILT (ML) POORLY GRADED SAND with SILT and GRAVEL (SP-SM) POORLY GRADED SAND with SILT (SP-SM) POORLY GRADED SAND with GRAVEL (SP) SANDY SILT (ML) NM 0.93 0.98 0.28 NM NM 9.42 4.43 26.63 NM TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 55 6.6 5.6 4.2 57 NM NM 4.3 NM NM City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:55 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 7 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NP NP NM NP NP NP NP NM NP NP NP NP NM NP NM 0.298 0.274 2.728 0.273 NM 0.141 0.075 0.239 0.114 10 20 5 15 5 82 75 33 92 100 100 2 19 19 37.5 12.5 NM NM NM NM NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 10 20 5 15 5 KB-11 KB-11 KB-12 KB-12 KB-13 KB-11 KB-11 KB-12 KB-12 KB-13 0.11 0.761 0.925 28.415 0.904 SILTY SAND (SM) POORLY GRADED SAND with SILT and GRAVEL (SP-SM) WELL-GRADED SAND with SILT and GRAVEL (SW-SM) WELL-GRADED GRAVEL with SAND (GW) POORLY GRADED SAND with SILT (SP-SM) NM 0.83 1.08 1.10 0.72 NM 5.41 12.29 119.13 7.94 TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 40 6.2 10.0 4.8 6.1 NM NM NM NM NM City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:56 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 8 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NP NP NP 25 NP NP NP NP 36 NP NP NP NP 11 0.06 NM NM 0.682 NM 0.019 NM NM 0.127 NM 20 2.5 10 15 20 100 96 55 94 100 100 100 4.75 19 2 19 19 6.3 NM NM 0.2 NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 20 2.5 10 15 20 KB-13 KB-14 KB-14 KB-14 KB-14 KB-13 KB-14 KB-14 KB-14 KB-14 0.126 0.158 0.123 5.986 NM SILTY SAND (SM) SILTY SAND (SM) SILTY SAND (SM) POORLY GRADED SAND with SILT and GRAVEL (SP-SM) SANDY SILT (ML) 1.52 NM NM 0.61 NM 6.71 NM NM 47.07 NM TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 37.0 36 38 5.2 68 30.7 NM NM 5.0 NM City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:56 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 9 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NM NP NM NM NP NM NP NM NM NP NM NP NM NM NM 6.113 NM 1.025 NM NM 1.729 NM 0.29 NM 10 15 5 15 2.5 100 22 97 53 95 74 87 100 9.5 37.5 12.5 37.5 19 NM NM NM NM NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 10 15 5 15 2.5 KB-15 KB-15 KB-16 KB-16 KB-17 KB-15 KB-15 KB-16 KB-16 KB-17 NM 14.039 0.125 6.403 0.092 SANDY SILT (ML) WELL-GRADED GRAVEL with SAND (GW) SILTY SAND (SM) POORLY GRADED SAND with GRAVEL (SP) NM 1.54 NM 0.57 NM NM 8.12 NM 22.07 NM TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NM = Not Measured 65 0.9 30 3.5 54 NM NM NM NM NM City of Renton Downtown Utility Improvements Project Renton, WashingtonDATE: 10/20/2019 DRAWN BY: BCO REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 12/20/2019 01:56 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Number Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 10 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NP NM NM NM NP NP NM NM NM NP NP NM NM NM NP S-4 S-5 S-1 S-2 S10 0.25 1.48 NM 0.095 0.19 0.093 0.466 NM NM NM 10 15 2.5 5 44 99 57 95 97 64 100 91 9.5 19 12.5 9.5 25 NM 0.3 NM NM NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 10 15 2.5 5 44 KB-17 KB-17 KB-18 KB-18 KB-19 KB-17 KB-17 KB-18 KB-18 KB-19 0.346 5.182 0.085 0.198 2.971 POORLY GRADED SAND with SILT (SP-SM) POORLY GRADED SAND with GRAVEL (SP) SILTY SAND with GRAVEL (SM) 1.95 0.91 NM NM NM 3.73 11.13 NM NM NM TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NA = Not Available NM = Not Measured 8.2 1.0 59 23 19 NM 0.7 NM NM NM CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDATE: 12/20/2019 DRAWN BY: MAE REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 01/20/2020 03:32 PM BY: WRosso 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 0.0010.010.1110100 3/8 3 1002416 301 2006 10 Sample Number Sample Description LL PL PI %SiltCu %ClayCcExploration ID Depth (ft.) 11 SIEVE ANALYSIS 50 HYDROMETERU.S. SIEVE OPENING IN INCHES U.S. SIEVE NUMBERS 1403 4 20 40BOULDER6 601.5 8 D60 D30 D10D100 Passing 3/4" Passing #4 Passing #200 NPNP NPNA NM NM40.5 8010019 NM Exploration ID Depth (ft.)PERCENT FINER BY WEIGHTGRAIN SIZE IN MILLIMETERS medium fine GRAVEL SANDCOBBLEcoarse coarse CLAYSILTfine Coefficients of Uniformity - Cu = D60 / D10 Coefficients of Curvature - CC = (D30)2 / D60 D10 D60 = Grain diameter at 60% passing D30 = Grain diameter at 30% passing D10 = Grain diameter at 10% passing 40.5KB-20 KB-20 0.313 SILTY SAND with GRAVEL (SM) NM NM TABLE 143/4 1/212 Sieve Analysis and Hydrometer Analysis testing performed in general accordance with ASTM D422. NP = Nonplastic NA = Not Available NM = Not Measured 36 NM CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTONDATE: 12/20/2019 DRAWN BY: WRR REVISED: - PROJECT NO.: 20181376 CHECKED BY: MBB gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLEgINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [_KLF_SIEVE ANALYSIS]PLOTTED: 01/20/2020 03:33 PM BY: WRosso KB-01 5.0 S-2 13.9 KB-01 7.5 S-3 18.2 KB-01 10.0 S-4 SANDY SILT 15.2 26 19 7 KB-01 15.0 S-5 72.3 100 97 56 KB-01 20.0 S-6 WELL-GRADED GRAVEL WITH SAND (GW) 8.8 45 3.2 Hydrometer KB-01 25.0 S-7 15.4 91 35 KB-01 30.0 S-8 16.8 KB-02 5.0 S-2 11.1 100 29 KB-02 7.5 S-3 10.5 KB-02 10.0 S-4 2.6 54 32 6.2 KB-02 15.0 S-5 6.9 KB-02 20.0 S-6 9.6 KB-02 25.0 S-7 19.3 KB-03 2.5 1 30.0 100 70 KB-03 5.0 2 27.9 KB-03 7.5 3 20.9 100 18 KB-03 10.0 4 15.9 100 12 KB-03 15.0 5 12.4 100 75 6.5 KB-03 20.0 6 POORLY GRADED SAND (SP) 31.8 86 3.5 Hydrometer KB-03 25.0 7 15.6 KB-03 30.0 8 10.2 KB-04 5.0 1 SILTY SAND (SM)27.1 97 47 NP NP NP KB-04 7.5 2 164.0 KB-04 10.0 3 SILTY SAND WITH GRAVEL (SM) 8.4 100 60 14 NP NP NP KB-04 15.0 4 3.9 KB-04 20.0 5 WELL-GRADED GRAVEL WITH SAND (GW) 5.8 79 39 1.6 NP NP NP KB-04 25.0 6 235.3 KB-04 30.0 7 29.8 LABORATORY TEST RESULT SUMMARY 12Passing 3/4"Sieve Analysis (%)Passing #4Passing #200Plasticity IndexSample No. Depth (ft.) Atterberg Limits Liquid LimitSample Description Plastic LimitWater Content (%)Dry Unit Wt. (pcf)Exploration ID Additional Tests Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above. NP = NonPlastic NA = Not Available TABLE CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LAB SUMMARY TABLE - SOIL]PLOTTED: 03/23/2020 03:56 PM BY: WRosso CHECKED BY: DRAWN BY: REVISED: - DATE: PROJECT NO.: 20181376 KB-04 35.0 8 8.7 KB-04 40.0 9 8.3 KB-04 45.0 10 19.0 KB-05 2.5 SILTY SAND WITH GRAVEL (SM)90 72 26 NP NP NP Uncorrected Maximum Dry Unit Weight: 129.9 pcf Uncorrected Optimum Water Content: 8.0% Corrected Maximum Dry Unit Weight: 161.3 KB-05 5.0 NP NP NP KB-06 2.5 S-1 18.4 KB-06 5.0 S-2 SILTY SAND (SM)28.7 100 49 NP NP NP KB-06 7.5 S-3 4.8 KB-06 10.0 S-4 4.8 KB-06 15.0 S-5 11.2 KB-06 20.0 S-6 WELL-GRADED GRAVEL WITH SILT AND SAND (GW-GM) 3.6 93 40 5.8 NP NP NP Hydrometer KB-06 25.0 S-7 9.4 KB-06 30.0 S-8 6.8 KB-07 2.5 S-1 11.4 KB-07 5.0 S-2 POORLY GRADED SAND WITH SILT AND GRAVEL (SP-SM) 4.9 100 73 6.3 NP NP NP KB-07 7.5 S-3 5.7 KB-07 10.0 S-4 WELL-GRADED GRAVEL WITH SAND (GW) 4.4 87 40 4.9 KB-07 15.0 S-5 2.7 KB-07 20.0 S-6 WELL-GRADED GRAVEL WITH SAND (GW) 2.8 90 44 4.2 KB-07 25.0 S-7 16.5 KB-07 30.0 S-8 33.1 KB-08 2.5 S-1 SILTY SAND WITH GRAVEL (SM) 22.4 91 82 18 NP NP NP KB-08 5.0 S-2 21.4 KB-08 7.5 S-3 14.8 KB-08 10.0 S-4 POORLY GRADED GRAVEL WITH SILT AND SAND (GP-GM) 5.7 87 52 7.3 NP NP NP LABORATORY TEST RESULT SUMMARY 13Passing 3/4"Sieve Analysis (%)Passing #4Passing #200Plasticity IndexSample No. Depth (ft.) Atterberg Limits Liquid LimitSample Description Plastic LimitWater Content (%)Dry Unit Wt. (pcf)Exploration ID Additional Tests Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above. NP = NonPlastic NA = Not Available TABLE CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LAB SUMMARY TABLE - SOIL]PLOTTED: 03/23/2020 03:56 PM BY: WRosso CHECKED BY: DRAWN BY: REVISED: - DATE: PROJECT NO.: 20181376 KB-08 15.0 S-5 4.2 KB-08 20.0 S-6 POORLY GRADED GRAVEL WITH SILT AND SAND (GP-GM) 3.2 89 52 5.8 NP NP NP KB-08 25.0 S-7 20.9 KB-08 30.0 S-8 10.9 KB-09 2.5 S-1 4.8 KB-09 5.0 S-2 WELL-GRADED GRAVEL WITH SAND (GW) 2.0 44 3.5 KB-09 7.5 S-3 12.4 KB-09 10.0 S-4 SILT (ML)37.7 93 35 27 8 KB-09 15.0 S-5 27.8 100 47 KB-09 20.0 S-6 28.4 47 KB-09 25.0 S-7 24.1 KB-09 30.0 S-8 25.8 KB-10 2.5 S-1 SANDY SILT (ML)16.2 55 NP NP NP KB-10 5.0 S-2 16.9 KB-10 7.5 S-3 24.7 KB-10 10.0 S-4 16.8 KB-10 15.0 S-5 POORLY GRADED SAND WITH SILT AND GRAVEL (SP-SM) 11.0 100 77 6.6 NP NP NP KB-10 20.0 S-6 POORLY GRADED SAND WITH SILT (SP-SM) 16.4 100 5.6 NP NP NP Hydrometer KB-10 25.0 S-7 POORLY GRADED SAND WITH GRAVEL (SP) 9.3 90 57 4.2 NP NP NP KB-10 30.0 S-8 4.1 KB-11 2.5 S-1 SANDY SILT (ML)19.9 100 57 NP NP NP KB-11 5.0 S-2 20.5 KB-11 7.5 S-3 33.8 KB-11 10.0 S-4 SILTY SAND (SM)20.7 40 NP NP NP KB-11 15.0 S-5 8.7 KB-11 20.0 S-6 POORLY GRADED SAND WITH SILT AND GRAVEL (SP-SM) 12.4 100 82 6.2 NP NP NP KB-11 25.0 S-7 15.0 LABORATORY TEST RESULT SUMMARY 14Passing 3/4"Sieve Analysis (%)Passing #4Passing #200Plasticity IndexSample No. Depth (ft.) Atterberg Limits Liquid LimitSample Description Plastic LimitWater Content (%)Dry Unit Wt. (pcf)Exploration ID Additional Tests Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above. NP = NonPlastic NA = Not Available TABLE CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LAB SUMMARY TABLE - SOIL]PLOTTED: 03/23/2020 03:56 PM BY: WRosso CHECKED BY: DRAWN BY: REVISED: - DATE: PROJECT NO.: 20181376 KB-12 2.5 S-1 22.1 KB-12 5.0 S-2 WELL-GRADED SAND WITH SILT AND GRAVEL (SW-SM) 11.7 100 75 10.0 NP NP NP KB-12 7.5 S-3 28.0 KB-12 10.0 S-4 32.1 KB-12 15.0 S-5 WELL-GRADED GRAVEL WITH SAND (GW) 6.5 33 4.8 KB-12 20.0 S-6 21.0 KB-12 25.0 S-7 6.8 KB-12 30.0 S-8 33.9 KB-13 2.5 S-1 20.5 KB-13 5.0 S-2 6.5 92 6.1 KB-13 7.5 S-3 31.5 KB-13 10.0 S-4 SILT 32.2 28 22 6 KB-13 15.0 S-5 SILT 33.7 30 24 6 KB-13 20.0 S-6 32.4 100 37.0 Hydrometer KB-13 30.0 12.2 KB-14 2.5 S-1 20.4 100 96 36 KB-14 3.0 8.8 KB-14 5.0 S-2 35.7 KB-14 7.5 S-3 43.5 KB-14 8.0 11.9 KB-14 10.0 S-4 71.6 38 KB-14 15.0 S-5 10.5 100 55 5.2 Hydrometer KB-14 20.0 S-6 SANDY SILT (ML)37.9 100 94 68 36 25 11 KB-14 25.0 S-7 13.1 KB-14 30.0 S-8 10.7 KB-15 5.6 40.4 KB-15 7.5 S-2 42.0 KB-15 10.0 S-3 SANDY SILT (ML)78.0 100 65 NP NP NP LABORATORY TEST RESULT SUMMARY 15Passing 3/4"Sieve Analysis (%)Passing #4Passing #200Plasticity IndexSample No. Depth (ft.) Atterberg Limits Liquid LimitSample Description Plastic LimitWater Content (%)Dry Unit Wt. (pcf)Exploration ID Additional Tests Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above. NP = NonPlastic NA = Not Available TABLE CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LAB SUMMARY TABLE - SOIL]PLOTTED: 03/23/2020 03:56 PM BY: WRosso CHECKED BY: DRAWN BY: REVISED: - DATE: PROJECT NO.: 20181376 KB-15 15.0 S-4 WELL-GRADED GRAVEL WITH SAND (GW) 4.8 74 22 0.9 KB-15 20.0 S-5 14.1 KB-15 25.0 S-6 13.9 KB-15 30.0 S-7 12.3 KB-16 2.5 S-1 17.9 KB-16 5.0 S-2 SILTY SAND (SM)16.4 97 30 NP NP NP KB-16 7.5 S-3 15.9 KB-16 10.0 S-4 29.5 KB-16 15.0 S-5 POORLY GRADED SAND WITH GRAVEL (SP) 7.7 87 53 3.5 KB-16 20.0 S-6 7.1 KB-17 2.5 S-1 23.7 100 95 54 KB-17 5.0 S-2 SILT (ML)44.2 88 39 31 8 KB-17 7.5 S-3 SILT 41.0 76 38 29 9 KB-17 10.0 S-4 POORLY GRADED SAND WITH SILT (SP-SM) 23.7 99 8.2 NP NP NP KB-17 15.0 S-5 POORLY GRADED SAND WITH GRAVEL (SP) 11.8 100 57 1.0 Hydrometer KB-17 20.0 S-6 6.0 KB-17 25.0 S-7 7.2 KB-17 30.0 S-8 117.3 KB-18 2.5 S-1 28.2 95 59 KB-18 5.0 S-2 15.9 97 23 KB-18 7.5 S-3 32.2 KB-18 10.0 S-4 SANDY SILT 41.4 38 27 11 KB-18 15.0 S-5 32.1 KB-18 20.0 S-6 35.9 KB-18 25.0 S-7 30.6 KB-18 30.0 S-8 31.1 KB-19 44.0 S10 SILTY SAND WITH GRAVEL (SM) 12.4 91 64 19 NP NP NP KB-20 40.5 SILTY SAND WITH GRAVEL (SM) 14.1 100 80 36 NP NP NP LABORATORY TEST RESULT SUMMARY 16Passing 3/4"Sieve Analysis (%)Passing #4Passing #200Plasticity IndexSample No. Depth (ft.) Atterberg Limits Liquid LimitSample Description Plastic LimitWater Content (%)Dry Unit Wt. (pcf)Exploration ID Additional Tests Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above. NP = NonPlastic NA = Not Available TABLE CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LAB SUMMARY TABLE - SOIL]PLOTTED: 03/23/2020 03:56 PM BY: WRosso CHECKED BY: DRAWN BY: REVISED: - DATE: PROJECT NO.: 20181376 KB-20 45.0 7.5 4.4 NP NP NP LABORATORY TEST RESULT SUMMARY 17Passing 3/4"Sieve Analysis (%)Passing #4Passing #200Plasticity IndexSample No. Depth (ft.) Atterberg Limits Liquid LimitSample Description Plastic LimitWater Content (%)Dry Unit Wt. (pcf)Exploration ID Additional Tests Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above. NP = NonPlastic NA = Not Available TABLE CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.003A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LAB SUMMARY TABLE - SOIL]PLOTTED: 03/23/2020 03:56 PM BY: WRosso CHECKED BY: DRAWN BY: REVISED: - DATE: PROJECT NO.: 20181376 MW-1 5.0 7.6 MW-1 10.0 25.4 MW-1 15.0 20.7 MW-1 20.0 13.5 MW-1 25.0 16.9 MW-2 7.5 29.6 MW-2 10.0 4.8 MW-2 15.0 14.7 MW-3 10.0 30.5 MW-3 15.0 15.0 MW-3 20.0 16.9 MW-3 25.0 15.9 MW-3 28.5 20.0 MW-4 2.5 25.4 MW-4 5.0 18.9 MW-4 7.5 47.4 MW-4 10.0 39.4 MW-4 15.0 35.5 MW-4 20.0 26.1 MW-5 2.5 7.0 MW-5 5.0 11.4 MW-5 7.5 37.2 MW-5 10.0 10.7 MW-5 15.0 6.8 MW-5 20.0 112.6 MW-5 25.0 27.5 MW-5 30.0 22.7 MW-5 35.0 17.2 LABORATORY TEST RESULT SUMMARY 18Passing 3/4"Sieve Analysis (%)Passing #4Passing #200Plasticity IndexDepth (ft.) Atterberg Limits Liquid LimitSample Description Plastic LimitWater Content (%)Dry Unit Wt. (pcf)Exploration ID Additional Tests Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above. NP = NonPlastic TABLE CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.002A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LAB SUMMARY TABLE - SOIL]PLOTTED: 03/23/2020 03:35 PM BY: WRosso CHECKED BY: DRAWN BY: REVISED: - DATE: PROJECT NO.: 20181376 MW-5 40.0 19.3 MW-5 45.0 14.9 MW-6 5.0 1.1 MW-8 2.5 41.7 MW-8 5.0 42.9 MW-8 7.5 23.1 MW-8 10.0 17.6 MW-8 15.0 19.3 MW-8 20.0 12.5 MW-8 25.0 18.4 MW-8 30.0 20.5 LABORATORY TEST RESULT SUMMARY 19Passing 3/4"Sieve Analysis (%)Passing #4Passing #200Plasticity IndexDepth (ft.) Atterberg Limits Liquid LimitSample Description Plastic LimitWater Content (%)Dry Unit Wt. (pcf)Exploration ID Additional Tests Refer to the Geotechnical Evaluation Report or the supplemental plates for the method used for the testing performed above. NP = NonPlastic TABLE CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS RENTON, WASHINGTON gINT FILE: Klf_gint_master_2018 PROJECT NUMBER: 20181376.002A OFFICE FILTER: SEATTLE gINT TEMPLATE: E:KLF_STANDARD_GINT_LIBRARY_2018.GLB [LAB SUMMARY TABLE - SOIL]PLOTTED: 03/23/2020 03:35 PM BY: WRosso CHECKED BY: DRAWN BY: REVISED: - DATE: PROJECT NO.: 20181376 APPENDIX C ENVIRONMENTAL LABORATORY ANALYTICAL TESTING SUMMARY, REPORTS AND TABLES ___________________________________________________________________________________ KB-1 8-12 10/02/19 NA 93 340 2,600 <0.0026 <0.0026 <0.0026 KB-10 11-15 09/30/19 NA 1,600 120 <110 <0.032 <0.032 <0.032 KB-11 14-15 09/25/19 NA 370 150 <56 <0.044 <0.044 <0.044 3-4 10/04/19 NA <25 <62 <120 <0.00058 <0.00058 <0.00058 10-15 10/04/19 NA <26 <66 <130 <0.022 <0.022 <0.022 MW-6 10 04/17/19 NA 320 <440 <140 <0.066 <0.066 <0.066 MW-9 8-10 12/17/19 <6.5 <6.9 <33 <65 <0.0012 <0.0012 <0.0012 MW-10 8-10 12/17/19 <6.2 <8.4 <31 <62 <0.0012 <0.0012 <0.0012 MW-11 8-10 12/16/19 <6.9 <7.8 <35 <69 <0.0013 <0.0013 <0.0013 MW-12 7-9 12/16/19 <6.8 <6.9 <34 <68 <0.0013 <0.0013 <0.0013 MW-13 8-10 12/16/19 <7.1 <8.2 <35 <71 <0.0014 <0.0014 <0.0014 100 2000 2000 0.03 0.05 0.03 Notes and Abbreviations: bgs = below ground surface PID = photo ionization detector ppm = parts per million mg/Kg = milligrams per kilogram or approximately parts per million TPH-GRO = gasoline-range total petroleum hydrocarbons TPH-DRO = diesel-range total petroleum hydrocarbons TPH-ORO = oil-range total petroleum hydrocarbons PCE = Tetrachloroethene TCE = Trichloroethene < = analyte concentration is below specified practical quantitation limit WADOE = Washington Department of Ecology Total Lead TABLE 4A Soil Laboratory Analytical Results WADOE Method A Cleanup Levels (mg/Kg) Renton Downtown Utility Improvements Project Renton, Washington Date Sampled Benzene PCE KB-14 Sample Location TPH- GRO TCETPH-OROTPH- DRO Depth (feet bgs) Concentrations (mg/Kg) March 27, 2020 TPH-GRO TPH-DRO TPH-ORO Benzene PCE TCE KB-1 12/18/19 15-25 6.20 <100 450 1700 0.21 <0.2 <0.2 KB-10 12/18/19 13-28 13.36 4900 <3400 <230 0.29 <0.2 <0.2 KB-11 12/18/19 15-25 12.82 6800 <4300 <230 1.0 <0.2 <0.2 MW-6 12/18/19 06/21/20 12.46 2100 1400 240 3.1 <0.2 <0.2 MW-9 12/17/19 NA 11.20 <100 <200 <250 <0.2 <0.2 <0.2 MW-10 12/17/19 NA Dry MW-11 12/16/19 NA 10.60 <100 <230 <230 <0.2 <0.2 <0.2 MW-12 12/16/19 NA 10.29 180 <200 <200 <0.2 <0.2 <0.2 MW-13 12/16/19 NA 10.30 <100 <200 <200 <0.2 <0.2 0.24 800 500 500 5 5 5 Notes and Abbreviations: µg/L = micrograms per liter TPH-GRO = gasoline-range total petroleum hydrocarbons TPH-DRO = diesel-range total petroleum hydrocarbons TPH-ORO = oil-range total petroleum hydrocarbons PCE = tetrachloroethene TCE = trichloroethene ft = feet btoc = below top of casing < = analyte concentration is below the laboratory reporting limit WADOE = Washington Department of Ecology BOLD = bold indicates that a concentration exceeds the WADOE Method A cleanup level for that analyte. Well or Boring Number Date Renton Downtown Utility Improvements Project Renton, Washington Well Screen Interval (feet bgs) Depth to Groundwater (ft btoc) WADOE Method A Cleanup Levels (µg/L): NS Concentrations (µg/L) TABLE 4B Groundwater Laboratory Analytical Results March 27, 2020 ENVIRONMENTAL INVESTIGATION SUMMARY ___________________________________________________________________________________ DESKTOP ENVIRONMENTAL SCREENING During the desktop environmental review performed in 2017, which included a larger project area, Kleinfelder identified 57 regulated and non-regulated facilities with the potential to impact subsurface soil and/or groundwater within the boundaries of the original site. There are 24 regulated and non-regulated facilities with the potential to impact subsurface soils or groundwater within or adjacent to the reduced, current project footprint. Of these, 7 were ranked Risk Level #1 and 17 were ranked Risk Level #2. These facilities may have used, and/or stored, hazardous materials or petroleum products. Risk Level #1 facilities were defined in the desktop study as those facilities where evidence of a release to soils and/or groundwater has been reported in the regulatory records; however, the extent of those impacts beneath the roadways was not determined during the desk top study. Risk Level #2 facilities are those with the potential for soil or groundwater impacts based on current or former site use. A map showing the identified properties of environmental concern is included as Figure C2. ENVIRONMENTAL SITE CHARACTERIZATIONS Soil Analytical Test Results During the geotechnical investigations the subsurface soils were screened for indications of contamination. No soil contamination was evident in the majority of the geotechnical borings. Petroleum hydrocarbons were identified in soil collected from four of the geotechnical borings (KB-1, KB-10, KB-11 and MW-6). Borings KB-10, KB-11, and MW-6 are located along South 3rd Street, near Smithers Avenue as indicated on Figure C1. Boring KB-1 is located on Lake Avenue, near the intersection with South 2nd Street. These borings were competed as groundwater monitoring wells to assess groundwater impacts. Five geoprobe borings (MW-9, MW-10, MW-11, MW-12, and MW-13) were later advanced and sampled (December 2019) to further assess potential contaminants in areas not assessed during the geotechnical investigations. The soil analytical results are summarized below: TPH-GRO and/or TPH-ORO were detected at concentrations exceeding the Model Toxics Control Act (MTCA) cleanup regulation (Chapter 173-340 WAC) Method A cleanup levels. TPH-DRO was detected at concentrations below the Method A cleanup level. Volatile organic compounds (VOCs) were not detected above regulatory levels. All of the VOC compounds detected are components of petroleum hydrocarbons; no chlorinated solvents were detected. No analytes were detected at concentrations above the laboratory reporting limits in soil samples collected from the geoprobe borings. The soil analytical results are summarized in Table C-1. Groundwater Analytical Results No contaminants were detected at concentrations above the laboratory reporting limits in groundwater samples collected from the geoprobe borings, MW-9, MW-11, MW-12, and MW-13. Boring MW-10 did not produce enough water to collect a groundwater sample for analysis. Petroleum hydrocarbon constituents exceeding the Washington Department of Ecology (WADOE) Method A cleanup levels were detected in the four groundwater monitoring wells sampled (KB-1, KB-10, KB-11, and MW-6). See Figure C1 for boring/well locations and analytical results. POTENTIAL SOURCES OF PETROLEUM IMPACTS Soil contamination in the four impacted borings was identified near the water table, with the overlying soil generally unimpacted. Based on the depth of the identified soil contamination at the level of the water table, with no apparent impact visually identified higher in the boring, the contamination is likely in the capillary fringe, the layer in which groundwater seeps up from a water table by capillary action, and the contamination detected is likely a result of contaminated groundwater in the vicinity of the impacted boring. Figure C2 identifies the impacted boring locations relative to the potential sources of subsurface contamination that were identified in our desktop study (Kleinfelder, 2018). Boring KB-1 is located approximately 150 feet east of a possible source of contamination, identified in Kleinfelder’s desktop study as site 27. Site 27 is listed as a Denny’s Restaurant where a leaking underground storage tank (UST) was reported in 2009 at 144 Rainier Ave. Borings KB-10, KB-11 and MW-6 are located adjacent to and/or approximately 150- to 200 feet east of sites 35 and 106. Site 35 is Sound Mazda Suzuki, where a used oil UST and an unleaded gasoline UST were removed; no records of a release were included in the files reviewed. Site 106 includes the northeast, southwest, and southeast corners of 3rd Street and Burnett Avenue, where historical Sanborn maps for 1927, 1944, and 1962 identified properties with uses as auto sales, service, repair, gas and oil; there were no regulatory records of contaminant releases in the files reviewed. CONCLUSIONS Petroleum hydrocarbons were detected in soil in borings KB-1, KB-10, KB-11 and MW-6 above regulatory levels. The impacts were observed at depths ranging from approximately 9 to 15 feet, (at the groundwater interface), indicating the petroleum impacts likely migrated to the boring locations via groundwater. It is reasonable to conclude that the soil in the area surrounding these borings is also impacted. While the extent of contamination across the Site has not been fully characterized, in general, clean soils have been identified within 75 to 200 feet of the borings in which contamination was identified. Groundwater contaminated with petroleum hydrocarbons was reported in samples collected from groundwater monitoring wells KB-1, KB-10, KB-11 and MW-6. In general, the locations where petroleum hydrocarbon impacts to soil were observed also had petroleum impacts to groundwater. FOFO SS W SSTTUGP UWT SD SD SD W SS SS SS SS SS SS SD SD SD SD W TWWT T T T SD SS SD SS SD SD SD T FO T P T W SD SD SS P FO TPT T PPPTBORE TPT TT T T T T PW P W W SS T T T P P PP P P P WPPWPPPP PPTVPT UGPT T TT T TT T T T T T T WW P PP W P P P P P T T W/TWO MOUNTED SIGNAL HEADS P W T T W P T T P TP P P T P P P PP UGPTTT T SS T T T W SS SS SS SS W W W W W T PPPTT PTPPTPPSS W WP PTPTPT TT SS SS SS SS SS W SS SS SS SS SS SS SS PPTPPPP PPPTPPPTTPTPPPTSS W W SD W WPWWPPPPT PWPWW 12''W DI W WW12''W DI 12''W DI 12''W DI W 12''W CIWP P P P P P P P P P P P P P W W P P P P P TT PW WT SS WT T T T SSSS W TVSS T SS SS SS P T T SS SS SS BARKTVP P P T FO P T P P T PPPW T T SD SD WSSPPPTTTCB 30024RIM 43.10IE 38.7 NE, 6" CONCIE 38.5 SW, 6" CONC CB 30025RIM 43.27IE 41.7 NE, 6" IRON CB 30166RIM 43.10IE 42.0 NE, 6" CONC FF=45.44 BARK 8' BUS SIGN PTBARK BARK W W W T W W PPTWUGPWTPPW TT PPW PPSSPPPPPTTTPPPSS SS 12"CI W12"DI W WATERWATER16"D I W 24"DI W 4"W MW-6 MW-8 MW-2 MW-1 MW-4 MW-3 MW-5MW-5 MW-6MW-4 MW-3 MW-1 MW-8 KB-18 KB-17 KB-16 KB-2 KB-3 KB-4 KB-5 KB-6 KB-7 KB-8 KB-9 KB-10 KB-11 KB-12 KB-13 KB-15 KB-14 MW-9 MW-10 MW-11 MW-13 KB-19 KB-20 MW-2 KB-1 MW-12 CAD FILE: U:\Projects\CADD\CADD 2018\20181376\Renton_10-15-19\20181376_Renton.dwg LAYOUT: ExplorPLOTTED: 1/17/2020 6:07 PM BY: dean fahrneyFIGURE DRAWN BY DATE: PROJECT: CHECKED BY REVISED: SITE AND EXPLORATION PLAN CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON 20181376 DMF MB 11/2019 11/2019 2AThe information included on this graphic representation has been compiled from a variety of sources and is subject to change without notice. Kleinfelder makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a land survey product nor is it designed or intended as a construction design document. The use or misuse of the information contained on this graphic representation is at the sole risk of the party using or misusing the information. N 0300 300150 APPROXIMATE SCALE (feet) LEGEND MONITORING WELLMW-8 HOLLOW-STEM AUGER BORINGKB-20 HOLLOW-STEM AUGER BORING CONVERTED TO MONITORING WELLKB-18 APPROXIMATE GEOTECHNICAL BORING LOCATIONS SITE AND EXPLORATION PLAN CITY OF RENTON DOWNTOWN UTILITY IMPROVEMENTS PROJECT RENTON, WASHINGTON APPROXIMATE LOCATION OF FORMER BLACK AND CEDAR RIVERS FORMER CEDAR RIVER FORM E R BLAC K RI V E R ENVIRONMENTAL GEOPROBE BORINGMW-13 IMPACTED SOIL AND WATER ENCOUNTERED IN BORING Based on 90 percent plans dated January 2020 provided by Murraysmith 2C1 !( !( !( !( !( !(!(!( !B<!B<!B<!B<!B<!!( !!( !!( !!( !!(!!( !!(!!(!!( !!( !!(!!( !!(!!(!!( !H !H !H !H !H!A!A!A!A!A!A!A39 24 31 13 30 44 5 25 98 3 18 45 50 28 14 10 35 40 27 26 34 32 21 8 37 49 3352 13 46 23 74 4217 43 19 42 11 4 34 54 38 41 101 7 45 78 85 6 41102 76104 105 106106106 48 12 36 47 57 51 41 29 KB-2 KB-3 KB-9 KB-4 KB-6 KB-8 KB-7KB-16 KB-15 KB-13 KB-12 KB-17 KB-5 KB-18 KB-14 KB-19 MW-9 MW-10 MW-11 MW-12 MW-13 MW-8 MW-5 MW-4 MW-2 MW-1 MW-3 The information included on this graphic representation has been compiled from a variety of sources and issubject to change without notice. Kleinfelder makes no representations or warranties, express or implied,as to accuracy, completeness, timeliness, or rights to the use of such information. This document is notintended for use as a land survey product nor is it designed or intended as a construction design document.The use or misuse of the information contained on this graphic representation is at the sole risk of the partyusing or misusing the information.www.kleinfelder.com PARCELS OF POTENTIAL EN VIRONMEN TALCONCERN AND ANALYTICAL RESU LTS CITY OF RENTONDOWNTOWN UTILITY IMPROVEMENTS PROJECTRENTON, WASHINGTON FIGURE 3 PROJECT: DRAWN: DRAWN BY: CHECKED BY: FILE NAME:Figure3.mxd 20181376 01/2020 KFH CH SALT LAKE CITY, UTFILE: L:\2018\20181376.003A - Renton DUIP Geotechnical Services\2.0 Technical Information\2.8 GIS600 0 600300³ APPROXIMATE SCALE (feet) NOTES:TPH-GRO = TOTAL PETROLEUM HYDROCARBONS - GASOLINE-RANGE ORGANICSTPH-DRO = TOTAL PETROLEUM HYDROCARBONS - DIESEL-RANGE ORGANICSTPH-ORO = TOTAL PETROLEUM HYDROCARBONS - OIL-RANGE ORGANICSSOIL CONCENTRATIONS IN mg/kg (MILLIGRAMS PER KILOGRAM)GROUNDWATER CONCENTRATIONS IN g/l (MICROGRAMS PER LITER) = NOT DETECTED AT OR ABOVE THE INDICATED QUANTITYBOLD = REPORTED CONCENTRATION EXCEEDS THE WASHINGTON DEPARTMENT OF ECOLOGY METHOD A SCREENING LEVEL < KB-1 Soi l GroundwaterTPH-GRO 93 < 100TPH-DRO 340 450TPH-ORO 2,600 1,700 KB-11 Soi l GroundwaterTPH-GRO 370 6 800TPH-DRO 150 < 4,300TPH-ORO < 56 < 230 KB-10 Soi l GroundwaterTPH-GRO 1,600 4,900TPH-DRO 120 < 3,400TPH-ORO < 55 < 230 MW-6 Soil Groundwate rTPH-GRO 320 2,100TPH-DRO < 440 1,400TPH-ORO < 140 240 MW-8KB-17 KB-18 MW-13 LEGEND !AMONITORING WELL !!(HOLLOW-STEM AUGER !H ENVIRONMENTAL GEOPROBE BORING !(PETROLEUM HYDROCARBONS DETECTED IN SOIL AT CONCENTRATIONSEXCEEDING ONE OR MORE OF THE WASHINGTON DEPT. OF ECOLOGYMETHOD A SCREENING LEVELSENVIRONMENTAL RECORDS SEARCH BOUNDARY (DIFFERENT THAN SITEBOUNDARY)REPORTED CONTAMINANT RELEASE SITE - INDICATES REPORTED RELEASETO SOIL OR GROUNDWATER WITH "OPEN" REGULATORY STATUS.SITE OF POTENTIAL ENVIRONMENTAL CONCERN - INDICATES CURRENT ORFORMER SITE USE OF POTENTIAL ENVIRONMENTAL CONCERN, ORREPORTED CONTAMINANT RELEASE WITH NO FURTHER ACTION STATUS BYREGULATORY AGENCY. !B<HOLLOW-STEM AUGER BORING CONVERTED TO MONITORING WELL C2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052 • (425) 883-3881 October 11, 2019 Ranjan Satyamurthy Kleinfelder 14710 NE 87th Street, Suite 100 Redmond, WA 98052 Re: Analytical Data for Project 20181376.003A Laboratory Reference No. 1910-065 Dear Ranjan: Enclosed are the analytical results and associated quality control data for samples submitted on October 4, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A Case Narrative Samples were collected on October 4, 2019 and received by the laboratory on October 4, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. Volatiles EPA 8260D Method 5035A VOA vials were not provided for the low-level analysis of sample KB14 3’. Therefore low-level analysis was performed on the sample using a VOA vial that did not contain a stir bar. Method 5035A states that for low-level VOC analysis the purge-and-trap system employed must be capable of agitating the sealed sample during the purging process. The purge-and-trap system that OnSite Environmental utilizes for the analysis of low-level VOCs has a stir motor that spins a magnetic stir bar within the sample thereby agitating the sample and providing more efficient purging. All Method 5035A VOA vials provided for sample KB14 10’ were unusable for low-level analysis due to overfilling. The sample was therefore extracted in methanol and analyzed at the lowest possible dilution allowed by Method 5035A. Consequently, the MTCA Method A clean-up level of 0.020 ppm for Methylene Chloride is not achievable. The value reported for Acetone in sample KB01 4-15’ exceeds the calibration range and is therefore an estimate. The sample was re-analyzed at the lowest possible dilution allowed by Method 5035A with non-detect results for Acetone. Any other QA/QC issues associated with this extraction and analysis will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A HYDROCARBON IDENTIFICATION NWTPH-HCID Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB14 3' Laboratory ID: 10-065-01 Gasoline Range Organics ND 25 NWTPH-HCID 10-7-19 10-7-19 Diesel Range Organics ND 62 NWTPH-HCID 10-7-19 10-7-19 Lube Oil Range Organics ND 120 NWTPH-HCID 10-7-19 10-7-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 107 50-150 Client ID: KB14 10' Laboratory ID: 10-065-02 Gasoline Range Organics ND 26 NWTPH-HCID 10-7-19 10-7-19 Diesel Range Organics ND 66 NWTPH-HCID 10-7-19 10-7-19 Lube Oil Range Organics ND 130 NWTPH-HCID 10-7-19 10-7-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 98 50-150 Client ID: KB01 4-15' Laboratory ID: 10-065-03 Gasoline Range Organics Detected 45 NWTPH-HCID 10-7-19 10-7-19 Diesel Range Organics Detected 110 NWTPH-HCID 10-7-19 10-7-19 N Lube Oil Detected 220 NWTPH-HCID 10-7-19 10-7-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 108 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A HYDROCARBON IDENTIFICATION NWTPH-HCID QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1007S3 Gasoline Range Organics ND 20 NWTPH-HCID 10-7-19 10-7-19 Diesel Range Organics ND 50 NWTPH-HCID 10-7-19 10-7-19 Lube Oil Range Organics ND 100 NWTPH-HCID 10-7-19 10-7-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 109 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB14 3' Laboratory ID: 10-065-01 Dichlorodifluoromethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Chloromethane ND 0.0029 EPA 8260D 10-8-19 10-8-19 Vinyl Chloride ND 0.00058 EPA 8260D 10-8-19 10-8-19 Bromomethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Chloroethane ND 0.0029 EPA 8260D 10-8-19 10-8-19 Trichlorofluoromethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,1-Dichloroethene ND 0.00058 EPA 8260D 10-8-19 10-8-19 Acetone ND 0.0058 EPA 8260D 10-8-19 10-8-19 Iodomethane ND 0.0029 EPA 8260D 10-8-19 10-8-19 Carbon Disulfide ND 0.00058 EPA 8260D 10-8-19 10-8-19 Methylene Chloride ND 0.0029 EPA 8260D 10-8-19 10-8-19 (trans) 1,2-Dichloroethene ND 0.00058 EPA 8260D 10-8-19 10-8-19 Methyl t-Butyl Ether ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,1-Dichloroethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Vinyl Acetate ND 0.0038 EPA 8260D 10-8-19 10-8-19 2,2-Dichloropropane ND 0.00058 EPA 8260D 10-8-19 10-8-19 (cis) 1,2-Dichloroethene ND 0.00058 EPA 8260D 10-8-19 10-8-19 2-Butanone ND 0.0029 EPA 8260D 10-8-19 10-8-19 Bromochloromethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Chloroform ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,1,1-Trichloroethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Carbon Tetrachloride ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,1-Dichloropropene ND 0.00058 EPA 8260D 10-8-19 10-8-19 Benzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,2-Dichloroethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Trichloroethene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,2-Dichloropropane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Dibromomethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Bromodichloromethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 2-Chloroethyl Vinyl Ether ND 0.0029 EPA 8260D 10-8-19 10-8-19 (cis) 1,3-Dichloropropene ND 0.00058 EPA 8260D 10-8-19 10-8-19 Methyl Isobutyl Ketone ND 0.0029 EPA 8260D 10-8-19 10-8-19 Toluene ND 0.0029 EPA 8260D 10-8-19 10-8-19 (trans) 1,3-Dichloropropene ND 0.00058 EPA 8260D 10-8-19 10-8-19 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB14 3' Laboratory ID: 10-065-01 1,1,2-Trichloroethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Tetrachloroethene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,3-Dichloropropane ND 0.00058 EPA 8260D 10-8-19 10-8-19 2-Hexanone ND 0.0029 EPA 8260D 10-8-19 10-8-19 Dibromochloromethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,2-Dibromoethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Chlorobenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,1,1,2-Tetrachloroethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 Ethylbenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 m,p-Xylene ND 0.0012 EPA 8260D 10-8-19 10-8-19 o-Xylene ND 0.00058 EPA 8260D 10-8-19 10-8-19 Styrene ND 0.00058 EPA 8260D 10-8-19 10-8-19 Bromoform ND 0.0029 EPA 8260D 10-8-19 10-8-19 Isopropylbenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 Bromobenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,1,2,2-Tetrachloroethane ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,2,3-Trichloropropane ND 0.00058 EPA 8260D 10-8-19 10-8-19 n-Propylbenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 2-Chlorotoluene ND 0.00058 EPA 8260D 10-8-19 10-8-19 4-Chlorotoluene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,3,5-Trimethylbenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 tert-Butylbenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,2,4-Trimethylbenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 sec-Butylbenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,3-Dichlorobenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 p-Isopropyltoluene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,4-Dichlorobenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,2-Dichlorobenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 n-Butylbenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 1,2-Dibromo-3-chloropropane ND 0.0029 EPA 8260D 10-8-19 10-8-19 1,2,4-Trichlorobenzene ND 0.00075 EPA 8260D 10-8-19 10-8-19 Hexachlorobutadiene ND 0.0029 EPA 8260D 10-8-19 10-8-19 Naphthalene ND 0.0029 EPA 8260D 10-8-19 10-8-19 1,2,3-Trichlorobenzene ND 0.00058 EPA 8260D 10-8-19 10-8-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 99 76-131 Toluene-d8 101 78-128 4-Bromofluorobenzene 97 71-130 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB14 10' Laboratory ID: 10-065-02 Dichlorodifluoromethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Chloromethane ND 0.045 EPA 8260D 10-8-19 10-8-19 Vinyl Chloride ND 0.022 EPA 8260D 10-8-19 10-8-19 Bromomethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Chloroethane ND 0.045 EPA 8260D 10-8-19 10-8-19 Trichlorofluoromethane ND 0.022 EPA 8260D 10-8-19 10-8-19 1,1-Dichloroethene ND 0.022 EPA 8260D 10-8-19 10-8-19 Acetone ND 0.045 EPA 8260D 10-8-19 10-8-19 Iodomethane ND 0.22 EPA 8260D 10-8-19 10-8-19 Carbon Disulfide ND 0.022 EPA 8260D 10-8-19 10-8-19 Methylene Chloride ND 0.045 EPA 8260D 10-8-19 10-8-19 (trans) 1,2-Dichloroethene ND 0.022 EPA 8260D 10-8-19 10-8-19 Methyl t-Butyl Ether ND 0.022 EPA 8260D 10-8-19 10-8-19 1,1-Dichloroethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Vinyl Acetate ND 0.058 EPA 8260D 10-8-19 10-8-19 2,2-Dichloropropane ND 0.022 EPA 8260D 10-8-19 10-8-19 (cis) 1,2-Dichloroethene ND 0.022 EPA 8260D 10-8-19 10-8-19 2-Butanone ND 0.22 EPA 8260D 10-8-19 10-8-19 Bromochloromethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Chloroform ND 0.022 EPA 8260D 10-8-19 10-8-19 1,1,1-Trichloroethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Carbon Tetrachloride ND 0.022 EPA 8260D 10-8-19 10-8-19 1,1-Dichloropropene ND 0.022 EPA 8260D 10-8-19 10-8-19 Benzene ND 0.022 EPA 8260D 10-8-19 10-8-19 1,2-Dichloroethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Trichloroethene ND 0.022 EPA 8260D 10-8-19 10-8-19 1,2-Dichloropropane ND 0.022 EPA 8260D 10-8-19 10-8-19 Dibromomethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Bromodichloromethane ND 0.022 EPA 8260D 10-8-19 10-8-19 2-Chloroethyl Vinyl Ether ND 0.22 EPA 8260D 10-8-19 10-8-19 (cis) 1,3-Dichloropropene ND 0.022 EPA 8260D 10-8-19 10-8-19 Methyl Isobutyl Ketone ND 0.022 EPA 8260D 10-8-19 10-8-19 Toluene ND 0.045 EPA 8260D 10-8-19 10-8-19 (trans) 1,3-Dichloropropene ND 0.022 EPA 8260D 10-8-19 10-8-19 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB14 10' Laboratory ID: 10-065-02 1,1,2-Trichloroethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Tetrachloroethene ND 0.022 EPA 8260D 10-8-19 10-8-19 1,3-Dichloropropane ND 0.022 EPA 8260D 10-8-19 10-8-19 2-Hexanone ND 0.045 EPA 8260D 10-8-19 10-8-19 Dibromochloromethane ND 0.022 EPA 8260D 10-8-19 10-8-19 1,2-Dibromoethane ND 0.0022 EPA 8260D/SIM 10-8-19 10-8-19 Chlorobenzene ND 0.045 EPA 8260D 10-8-19 10-8-19 1,1,1,2-Tetrachloroethane ND 0.022 EPA 8260D 10-8-19 10-8-19 Ethylbenzene ND 0.022 EPA 8260D 10-8-19 10-8-19 m,p-Xylene ND 0.045 EPA 8260D 10-8-19 10-8-19 o-Xylene ND 0.022 EPA 8260D 10-8-19 10-8-19 Styrene ND 0.022 EPA 8260D 10-8-19 10-8-19 Bromoform ND 0.045 EPA 8260D 10-8-19 10-8-19 Isopropylbenzene ND 0.022 EPA 8260D 10-8-19 10-8-19 Bromobenzene ND 0.022 EPA 8260D 10-8-19 10-8-19 1,1,2,2-Tetrachloroethane ND 0.022 EPA 8260D 10-8-19 10-8-19 1,2,3-Trichloropropane ND 0.022 EPA 8260D 10-8-19 10-8-19 n-Propylbenzene ND 0.022 EPA 8260D 10-8-19 10-8-19 2-Chlorotoluene ND 0.022 EPA 8260D 10-8-19 10-8-19 4-Chlorotoluene ND 0.022 EPA 8260D 10-8-19 10-8-19 1,3,5-Trimethylbenzene ND 0.022 EPA 8260D 10-8-19 10-8-19 tert-Butylbenzene ND 0.022 EPA 8260D 10-8-19 10-8-19 1,2,4-Trimethylbenzene ND 0.045 EPA 8260D 10-8-19 10-8-19 sec-Butylbenzene ND 0.022 EPA 8260D 10-8-19 10-8-19 1,3-Dichlorobenzene ND 0.045 EPA 8260D 10-8-19 10-8-19 p-Isopropyltoluene ND 0.022 EPA 8260D 10-8-19 10-8-19 1,4-Dichlorobenzene ND 0.045 EPA 8260D 10-8-19 10-8-19 1,2-Dichlorobenzene ND 0.045 EPA 8260D 10-8-19 10-8-19 n-Butylbenzene ND 0.045 EPA 8260D 10-8-19 10-8-19 1,2-Dibromo-3-chloropropane ND 0.22 EPA 8260D 10-8-19 10-8-19 1,2,4-Trichlorobenzene ND 0.058 EPA 8260D 10-8-19 10-8-19 Hexachlorobutadiene ND 0.22 EPA 8260D 10-8-19 10-8-19 Naphthalene ND 0.22 EPA 8260D 10-8-19 10-8-19 1,2,3-Trichlorobenzene ND 0.045 EPA 8260D 10-8-19 10-8-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 97 76-131 Toluene-d8 98 78-128 4-Bromofluorobenzene 97 71-130 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB01 4-15' Laboratory ID: 10-065-03 Dichlorodifluoromethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Chloromethane ND 0.013 EPA 8260D 10-8-19 10-8-19 Vinyl Chloride ND 0.0026 EPA 8260D 10-8-19 10-8-19 Bromomethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Chloroethane ND 0.013 EPA 8260D 10-8-19 10-8-19 Trichlorofluoromethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,1-Dichloroethene ND 0.0026 EPA 8260D 10-8-19 10-8-19 Acetone 1.4 0.026 EPA 8260D 10-8-19 10-8-19 E Iodomethane ND 0.013 EPA 8260D 10-8-19 10-8-19 Carbon Disulfide 0.016 0.0026 EPA 8260D 10-8-19 10-8-19 Methylene Chloride ND 0.013 EPA 8260D 10-8-19 10-8-19 (trans) 1,2-Dichloroethene ND 0.0026 EPA 8260D 10-8-19 10-8-19 Methyl t-Butyl Ether ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,1-Dichloroethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Vinyl Acetate ND 0.017 EPA 8260D 10-8-19 10-8-19 2,2-Dichloropropane ND 0.0026 EPA 8260D 10-8-19 10-8-19 (cis) 1,2-Dichloroethene ND 0.0026 EPA 8260D 10-8-19 10-8-19 2-Butanone 0.38 0.013 EPA 8260D 10-8-19 10-8-19 Bromochloromethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Chloroform ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,1,1-Trichloroethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Carbon Tetrachloride ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,1-Dichloropropene ND 0.0026 EPA 8260D 10-8-19 10-8-19 Benzene ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,2-Dichloroethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Trichloroethene ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,2-Dichloropropane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Dibromomethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Bromodichloromethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 2-Chloroethyl Vinyl Ether ND 0.013 EPA 8260D 10-8-19 10-8-19 (cis) 1,3-Dichloropropene ND 0.0026 EPA 8260D 10-8-19 10-8-19 Methyl Isobutyl Ketone ND 0.013 EPA 8260D 10-8-19 10-8-19 Toluene ND 0.013 EPA 8260D 10-8-19 10-8-19 (trans) 1,3-Dichloropropene ND 0.0026 EPA 8260D 10-8-19 10-8-19 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB01 4-15' Laboratory ID: 10-065-03 1,1,2-Trichloroethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Tetrachloroethene ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,3-Dichloropropane ND 0.0026 EPA 8260D 10-8-19 10-8-19 2-Hexanone ND 0.013 EPA 8260D 10-8-19 10-8-19 Dibromochloromethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,2-Dibromoethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Chlorobenzene ND 0.0026 EPA 8260D 10-8-19 10-8-19 1,1,1,2-Tetrachloroethane ND 0.0026 EPA 8260D 10-8-19 10-8-19 Ethylbenzene ND 0.0026 EPA 8260D 10-8-19 10-8-19 m,p-Xylene 0.037 0.0053 EPA 8260D 10-8-19 10-8-19 o-Xylene 0.033 0.0026 EPA 8260D 10-8-19 10-8-19 Styrene ND 0.0026 EPA 8260D 10-8-19 10-8-19 Bromoform ND 0.013 EPA 8260D 10-8-19 10-8-19 Isopropylbenzene 0.0064 0.0026 EPA 8260D 10-8-19 10-8-19 Bromobenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 1,1,2,2-Tetrachloroethane ND 0.16 EPA 8260D 10-8-19 10-8-19 1,2,3-Trichloropropane ND 0.16 EPA 8260D 10-8-19 10-8-19 n-Propylbenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 2-Chlorotoluene 0.18 0.16 EPA 8260D 10-8-19 10-8-19 4-Chlorotoluene ND 0.16 EPA 8260D 10-8-19 10-8-19 1,3,5-Trimethylbenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 tert-Butylbenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 1,2,4-Trimethylbenzene 0.31 0.16 EPA 8260D 10-8-19 10-8-19 sec-Butylbenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 1,3-Dichlorobenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 p-Isopropyltoluene ND 0.16 EPA 8260D 10-8-19 10-8-19 1,4-Dichlorobenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 1,2-Dichlorobenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 n-Butylbenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 1,2-Dibromo-3-chloropropane ND 0.81 EPA 8260D 10-8-19 10-8-19 1,2,4-Trichlorobenzene ND 0.21 EPA 8260D 10-8-19 10-8-19 Hexachlorobutadiene ND 0.81 EPA 8260D 10-8-19 10-8-19 Naphthalene ND 0.81 EPA 8260D 10-8-19 10-8-19 1,2,3-Trichlorobenzene ND 0.16 EPA 8260D 10-8-19 10-8-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 105 76-131 Toluene-d8 88 78-128 4-Bromofluorobenzene 84 71-130 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1008S1 Dichlorodifluoromethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Chloromethane ND 0.0010 EPA 8260D 10-8-19 10-8-19 Vinyl Chloride ND 0.00050 EPA 8260D 10-8-19 10-8-19 Bromomethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Chloroethane ND 0.0010 EPA 8260D 10-8-19 10-8-19 Trichlorofluoromethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,1-Dichloroethene ND 0.00050 EPA 8260D 10-8-19 10-8-19 Acetone ND 0.0010 EPA 8260D 10-8-19 10-8-19 Iodomethane ND 0.0050 EPA 8260D 10-8-19 10-8-19 Carbon Disulfide ND 0.00050 EPA 8260D 10-8-19 10-8-19 Methylene Chloride ND 0.0010 EPA 8260D 10-8-19 10-8-19 (trans) 1,2-Dichloroethene ND 0.00050 EPA 8260D 10-8-19 10-8-19 Methyl t-Butyl Ether ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,1-Dichloroethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Vinyl Acetate ND 0.0013 EPA 8260D 10-8-19 10-8-19 2,2-Dichloropropane ND 0.00050 EPA 8260D 10-8-19 10-8-19 (cis) 1,2-Dichloroethene ND 0.00050 EPA 8260D 10-8-19 10-8-19 2-Butanone ND 0.0050 EPA 8260D 10-8-19 10-8-19 Bromochloromethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Chloroform ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,1,1-Trichloroethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Carbon Tetrachloride ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,1-Dichloropropene ND 0.00050 EPA 8260D 10-8-19 10-8-19 Benzene ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,2-Dichloroethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Trichloroethene ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,2-Dichloropropane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Dibromomethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Bromodichloromethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260D 10-8-19 10-8-19 (cis) 1,3-Dichloropropene ND 0.00050 EPA 8260D 10-8-19 10-8-19 Methyl Isobutyl Ketone ND 0.00050 EPA 8260D 10-8-19 10-8-19 Toluene ND 0.0010 EPA 8260D 10-8-19 10-8-19 (trans) 1,3-Dichloropropene ND 0.00050 EPA 8260D 10-8-19 10-8-19 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1008S1 1,1,2-Trichloroethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Tetrachloroethene ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,3-Dichloropropane ND 0.00050 EPA 8260D 10-8-19 10-8-19 2-Hexanone ND 0.0010 EPA 8260D 10-8-19 10-8-19 Dibromochloromethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,2-Dibromoethane ND 0.000050 EPA 8260D/SIM 10-8-19 10-8-19 Chlorobenzene ND 0.0010 EPA 8260D 10-8-19 10-8-19 1,1,1,2-Tetrachloroethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 Ethylbenzene ND 0.00050 EPA 8260D 10-8-19 10-8-19 m,p-Xylene ND 0.0010 EPA 8260D 10-8-19 10-8-19 o-Xylene ND 0.00050 EPA 8260D 10-8-19 10-8-19 Styrene ND 0.00050 EPA 8260D 10-8-19 10-8-19 Bromoform ND 0.0010 EPA 8260D 10-8-19 10-8-19 Isopropylbenzene ND 0.00050 EPA 8260D 10-8-19 10-8-19 Bromobenzene ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,1,2,2-Tetrachloroethane ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,2,3-Trichloropropane ND 0.00050 EPA 8260D 10-8-19 10-8-19 n-Propylbenzene ND 0.00050 EPA 8260D 10-8-19 10-8-19 2-Chlorotoluene ND 0.00050 EPA 8260D 10-8-19 10-8-19 4-Chlorotoluene ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,3,5-Trimethylbenzene ND 0.00050 EPA 8260D 10-8-19 10-8-19 tert-Butylbenzene ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260D 10-8-19 10-8-19 sec-Butylbenzene ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,3-Dichlorobenzene ND 0.0010 EPA 8260D 10-8-19 10-8-19 p-Isopropyltoluene ND 0.00050 EPA 8260D 10-8-19 10-8-19 1,4-Dichlorobenzene ND 0.0010 EPA 8260D 10-8-19 10-8-19 1,2-Dichlorobenzene ND 0.0010 EPA 8260D 10-8-19 10-8-19 n-Butylbenzene ND 0.0010 EPA 8260D 10-8-19 10-8-19 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260D 10-8-19 10-8-19 1,2,4-Trichlorobenzene ND 0.0013 EPA 8260D 10-8-19 10-8-19 Hexachlorobutadiene ND 0.0050 EPA 8260D 10-8-19 10-8-19 Naphthalene ND 0.0050 EPA 8260D 10-8-19 10-8-19 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260D 10-8-19 10-8-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 95 76-131 Toluene-d8 99 78-128 4-Bromofluorobenzene 100 71-130 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1008S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0497 0.0446 0.0500 0.0500 99 89 57-133 11 18 Benzene 0.0453 0.0450 0.0500 0.0500 91 90 71-129 1 16 Trichloroethene 0.0503 0.0497 0.0500 0.0500 101 99 71-122 1 16 Toluene 0.0489 0.0481 0.0500 0.0500 98 96 74-125 2 15 Chlorobenzene 0.0513 0.0516 0.0500 0.0500 103 103 72-120 1 14 Surrogate: Dibromofluoromethane 98 94 76-131 Toluene-d8 100 100 78-128 4-Bromofluorobenzene 97 106 71-130 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB01 4-15' Laboratory ID: 10-065-03 Gasoline 93 18 NWTPH-Gx 10-9-19 10-9-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 106 58-129 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1009S1 Gasoline ND 5.0 NWTPH-Gx 10-9-19 10-9-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 87 58-129 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 10-098-02 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 96 94 58-129 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB01 4-15' Laboratory ID: 10-065-03 Diesel Range Organics 340 56 NWTPH-Dx 10-10-19 10-10-19 N Lube Oil 2600 110 NWTPH-Dx 10-10-19 10-10-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 67 50-150 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1010S1 Diesel Range Organics ND 25 NWTPH-Dx 10-10-19 10-10-19 Lube Oil Range Organics ND 50 NWTPH-Dx 10-10-19 10-10-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 76 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 10-120-02 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 60 75 50-150 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: October 4, 2019 Laboratory Reference: 1910-065 Project: 20181376.003A % MOISTURE Date Client ID Lab ID % Moisture Analyzed KB14 3' 10-065-01 19 10-7-19 KB14 10' 10-065-02 24 10-7-19 KB01 4-15' 10-065-03 55 10-7-19 19 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052  (425) 883-3881 October 11, 2019 Ranjan Satyamurthy Kleinfelder 14710 NE 87th Street, Suite 100 Redmond, WA 98052 Re: Analytical Data for Project 20181376.003A Laboratory Reference No. 1909-327 Dear Ranjan: Enclosed are the analytical results and associated quality control data for samples submitted on September 30, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A Case Narrative Samples were collected on September 30, 2019 and received by the laboratory on September 30, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. Volatiles EPA 8260D Analysis Surrogate Toluene-d8 is outside of the control limits due to co-eluting non-target analytes. Some MTCA Method A clean-up levels are not achievable due to the necessary dilution of the sample. Any other QA/QC issues associated with this extraction and analysis will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A HYDROCARBON IDENTIFICATION NWTPH-HCID Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB10-5-15' Laboratory ID: 09-327-01 Gasoline Range Organics Detected 22 NWTPH-HCID 10-1-19 10-1-19 Diesel Range Organics Detected 55 NWTPH-HCID 10-1-19 10-1-19 Lube Oil Range Organics ND 110 NWTPH-HCID 10-1-19 10-1-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 107 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A HYDROCARBON IDENTIFICATION NWTPH-HCID QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1001S1 Gasoline Range Organics ND 20 NWTPH-HCID 10-1-19 10-1-19 Diesel Range Organics ND 50 NWTPH-HCID 10-1-19 10-1-19 Lube Oil Range Organics ND 100 NWTPH-HCID 10-1-19 10-1-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 104 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB10-5-15' Laboratory ID: 09-327-01 Dichlorodifluoromethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Chloromethane ND 0.16 EPA 8260D 10-3-19 10-3-19 Vinyl Chloride ND 0.032 EPA 8260D 10-3-19 10-3-19 Bromomethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Chloroethane ND 0.16 EPA 8260D 10-3-19 10-3-19 Trichlorofluoromethane ND 0.032 EPA 8260D 10-3-19 10-3-19 1,1-Dichloroethene ND 0.032 EPA 8260D 10-3-19 10-3-19 Acetone ND 0.32 EPA 8260D 10-3-19 10-3-19 Iodomethane ND 0.16 EPA 8260D 10-3-19 10-3-19 Carbon Disulfide ND 0.032 EPA 8260D 10-3-19 10-3-19 Methylene Chloride ND 0.16 EPA 8260D 10-3-19 10-3-19 (trans) 1,2-Dichloroethene ND 0.032 EPA 8260D 10-3-19 10-3-19 Methyl t-Butyl Ether ND 0.032 EPA 8260D 10-3-19 10-3-19 1,1-Dichloroethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Vinyl Acetate ND 0.16 EPA 8260D 10-3-19 10-3-19 2,2-Dichloropropane ND 0.032 EPA 8260D 10-3-19 10-3-19 (cis) 1,2-Dichloroethene ND 0.032 EPA 8260D 10-3-19 10-3-19 2-Butanone ND 0.16 EPA 8260D 10-3-19 10-3-19 Bromochloromethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Chloroform ND 0.032 EPA 8260D 10-3-19 10-3-19 1,1,1-Trichloroethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Carbon Tetrachloride ND 0.032 EPA 8260D 10-3-19 10-3-19 1,1-Dichloropropene ND 0.032 EPA 8260D 10-3-19 10-3-19 Benzene ND 0.032 EPA 8260D 10-3-19 10-3-19 1,2-Dichloroethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Trichloroethene ND 0.032 EPA 8260D 10-3-19 10-3-19 1,2-Dichloropropane ND 0.032 EPA 8260D 10-3-19 10-3-19 Dibromomethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Bromodichloromethane ND 0.032 EPA 8260D 10-3-19 10-3-19 2-Chloroethyl Vinyl Ether ND 0.16 EPA 8260D 10-3-19 10-3-19 (cis) 1,3-Dichloropropene ND 0.032 EPA 8260D 10-3-19 10-3-19 Methyl Isobutyl Ketone ND 0.16 EPA 8260D 10-3-19 10-3-19 Toluene ND 0.16 EPA 8260D 10-3-19 10-3-19 (trans) 1,3-Dichloropropene ND 0.032 EPA 8260D 10-3-19 10-3-19 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB10-5-15' Laboratory ID: 09-327-01 1,1,2-Trichloroethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Tetrachloroethene ND 0.032 EPA 8260D 10-3-19 10-3-19 1,3-Dichloropropane ND 0.032 EPA 8260D 10-3-19 10-3-19 2-Hexanone ND 0.16 EPA 8260D 10-3-19 10-3-19 Dibromochloromethane ND 0.032 EPA 8260D 10-3-19 10-3-19 1,2-Dibromoethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Chlorobenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 1,1,1,2-Tetrachloroethane ND 0.032 EPA 8260D 10-3-19 10-3-19 Ethylbenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 m,p-Xylene ND 0.063 EPA 8260D 10-3-19 10-3-19 o-Xylene ND 0.032 EPA 8260D 10-3-19 10-3-19 Styrene ND 0.032 EPA 8260D 10-3-19 10-3-19 Bromoform ND 0.16 EPA 8260D 10-3-19 10-3-19 Isopropylbenzene 0.93 0.032 EPA 8260D 10-3-19 10-3-19 Bromobenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 1,1,2,2-Tetrachloroethane ND 0.032 EPA 8260D 10-3-19 10-3-19 1,2,3-Trichloropropane ND 0.032 EPA 8260D 10-3-19 10-3-19 n-Propylbenzene 2.1 0.032 EPA 8260D 10-3-19 10-3-19 2-Chlorotoluene ND 0.032 EPA 8260D 10-3-19 10-3-19 4-Chlorotoluene ND 0.032 EPA 8260D 10-3-19 10-3-19 1,3,5-Trimethylbenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 tert-Butylbenzene 0.070 0.032 EPA 8260D 10-3-19 10-3-19 1,2,4-Trimethylbenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 sec-Butylbenzene 1.3 0.032 EPA 8260D 10-3-19 10-3-19 1,3-Dichlorobenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 p-Isopropyltoluene 0.31 0.032 EPA 8260D 10-3-19 10-3-19 1,4-Dichlorobenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 1,2-Dichlorobenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 n-Butylbenzene 2.0 0.032 EPA 8260D 10-3-19 10-3-19 1,2-Dibromo-3-chloropropane ND 0.16 EPA 8260D 10-3-19 10-3-19 1,2,4-Trichlorobenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 Hexachlorobutadiene ND 0.16 EPA 8260D 10-3-19 10-3-19 Naphthalene ND 0.032 EPA 8260D 10-3-19 10-3-19 1,2,3-Trichlorobenzene ND 0.032 EPA 8260D 10-3-19 10-3-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 106 76-131 Toluene-d8 129 78-128 Q 4-Bromofluorobenzene 121 71-130 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1003S1 Dichlorodifluoromethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Chloromethane ND 0.0050 EPA 8260D 10-3-19 10-3-19 Vinyl Chloride ND 0.0010 EPA 8260D 10-3-19 10-3-19 Bromomethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Chloroethane ND 0.0050 EPA 8260D 10-3-19 10-3-19 Trichlorofluoromethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,1-Dichloroethene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Acetone ND 0.010 EPA 8260D 10-3-19 10-3-19 Iodomethane ND 0.0050 EPA 8260D 10-3-19 10-3-19 Carbon Disulfide ND 0.0010 EPA 8260D 10-3-19 10-3-19 Methylene Chloride ND 0.0050 EPA 8260D 10-3-19 10-3-19 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Methyl t-Butyl Ether ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,1-Dichloroethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Vinyl Acetate ND 0.0050 EPA 8260D 10-3-19 10-3-19 2,2-Dichloropropane ND 0.0010 EPA 8260D 10-3-19 10-3-19 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260D 10-3-19 10-3-19 2-Butanone ND 0.0050 EPA 8260D 10-3-19 10-3-19 Bromochloromethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Chloroform ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,1,1-Trichloroethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Carbon Tetrachloride ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,1-Dichloropropene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Benzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,2-Dichloroethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Trichloroethene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,2-Dichloropropane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Dibromomethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Bromodichloromethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260D 10-3-19 10-3-19 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Methyl Isobutyl Ketone ND 0.0050 EPA 8260D 10-3-19 10-3-19 Toluene ND 0.0050 EPA 8260D 10-3-19 10-3-19 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260D 10-3-19 10-3-19 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1003S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Tetrachloroethene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,3-Dichloropropane ND 0.0010 EPA 8260D 10-3-19 10-3-19 2-Hexanone ND 0.0050 EPA 8260D 10-3-19 10-3-19 Dibromochloromethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,2-Dibromoethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Chlorobenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 Ethylbenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 m,p-Xylene ND 0.0020 EPA 8260D 10-3-19 10-3-19 o-Xylene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Styrene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Bromoform ND 0.0050 EPA 8260D 10-3-19 10-3-19 Isopropylbenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Bromobenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,2,3-Trichloropropane ND 0.0010 EPA 8260D 10-3-19 10-3-19 n-Propylbenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 2-Chlorotoluene ND 0.0010 EPA 8260D 10-3-19 10-3-19 4-Chlorotoluene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 tert-Butylbenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 sec-Butylbenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,3-Dichlorobenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 p-Isopropyltoluene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,4-Dichlorobenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,2-Dichlorobenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 n-Butylbenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260D 10-3-19 10-3-19 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Hexachlorobutadiene ND 0.0050 EPA 8260D 10-3-19 10-3-19 Naphthalene ND 0.0010 EPA 8260D 10-3-19 10-3-19 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260D 10-3-19 10-3-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 76-131 Toluene-d8 98 78-128 4-Bromofluorobenzene 93 71-130 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1003S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0421 0.0449 0.0500 0.0500 84 90 57-133 6 18 Benzene 0.0451 0.0470 0.0500 0.0500 90 94 71-129 4 16 Trichloroethene 0.0490 0.0506 0.0500 0.0500 98 101 71-122 3 16 Toluene 0.0456 0.0468 0.0500 0.0500 91 94 74-125 3 15 Chlorobenzene 0.0484 0.0509 0.0500 0.0500 97 102 72-120 5 14 Surrogate: Dibromofluoromethane 94 96 76-131 Toluene-d8 94 97 78-128 4-Bromofluorobenzene 93 92 71-130 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB10-5-15' Laboratory ID: 09-327-01 Gasoline 1600 45 NWTPH-Gx 10-8-19 10-9-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 88 58-129 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1008S1 Gasoline ND 5.0 NWTPH-Gx 10-8-19 10-8-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 86 58-129 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 10-056-01 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 89 92 58-129 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB10-5-15' Laboratory ID: 09-327-01 Diesel Range Organics 120 28 NWTPH-Dx 10-7-19 10-7-19 M Lube Oil Range Organics ND 55 NWTPH-Dx 10-7-19 10-7-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 78 50-150 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1007S1 Diesel Range Organics ND 25 NWTPH-Dx 10-7-19 10-7-19 Lube Oil Range Organics ND 50 NWTPH-Dx 10-7-19 10-7-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 81 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB1007S1 ORIG DUP Diesel Fuel #2 100 97.6 NA NA NA NA 2 NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 87 87 50-150 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 11, 2019 Samples Submitted: September 30, 2019 Laboratory Reference: 1909-327 Project: 20181376.003A % MOISTURE Date Client ID Lab ID % Moisture Analyzed KB10-5-15' 09-327-01 9 10-1-19 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052  (425) 883-3881 October 10, 2019 Ranjan Satyamurthy Kleinfelder 14710 NE 87th Street, Suite 100 Redmond, WA 98052 Re: Analytical Data for Project 20181376 Laboratory Reference No. 1909-292 Dear Ranjan: Enclosed are the analytical results and associated quality control data for samples submitted on September 26, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 Case Narrative Samples were collected on September 25, 2019 and received by the laboratory on September 26, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. Volatiles EPA 8260D Analysis Surrogate Toluene-d8 is outside of the control limits due to co-eluting non-target analytes. Some MTCA Method A clean-up levels are not achievable due to the necessary dilution of the sample. Any other QA/QC issues associated with this extraction and analysis will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 HYDROCARBON IDENTIFICATION NWTPH-HCID Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KLF11-5-15' Laboratory ID: 09-292-01 Gasoline Range Organics Detected 22 NWTPH-HCID 9-30-19 9-30-19 Diesel Range Organics Detected 56 NWTPH-HCID 9-30-19 9-30-19 Lube Oil Range Organics ND 110 NWTPH-HCID 9-30-19 9-30-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 107 50-150 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 HYDROCARBON IDENTIFICATION NWTPH-HCID QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB0930S2 Gasoline Range Organics ND 20 NWTPH-HCID 9-30-19 9-30-19 Diesel Range Organics ND 50 NWTPH-HCID 9-30-19 9-30-19 Lube Oil Range Organics ND 100 NWTPH-HCID 9-30-19 9-30-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 105 50-150 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KLF11-5-15' Laboratory ID: 09-292-01 Gasoline 370 9.1 NWTPH-Gx 10-3-19 10-3-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 97 58-129 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1003S3 Gasoline ND 5.0 NWTPH-Gx 10-3-19 10-3-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 83 58-129 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 10-030-01 ORIG DUP Gasoline 6.69 5.80 NA NA NA NA 14 30 Surrogate: Fluorobenzene 110 111 58-129 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KLF11-5-15' Laboratory ID: 09-292-01 Diesel Range Organics 150 28 NWTPH-Dx 10-7-19 10-8-19 M1 Lube Oil Range Organics ND 56 NWTPH-Dx 10-7-19 10-8-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 79 50-150 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1007S2 Diesel Range Organics ND 25 NWTPH-Dx 10-7-19 10-7-19 Lube Oil Range Organics ND 50 NWTPH-Dx 10-7-19 10-7-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 81 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 10-025-01 ORIG DUP Diesel Range Organics 34.8 28.1 NA NA NA NA 21 NA Lube Oil Range Organics 75.0 58.6 NA NA NA NA 25 NA Surrogate: o-Terphenyl 82 68 50-150 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KLF11-5-15' Laboratory ID: 09-292-01 Dichlorodifluoromethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Chloromethane ND 0.22 EPA 8260D 10-2-19 10-2-19 Vinyl Chloride ND 0.044 EPA 8260D 10-2-19 10-2-19 Bromomethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Chloroethane ND 0.22 EPA 8260D 10-2-19 10-2-19 Trichlorofluoromethane ND 0.044 EPA 8260D 10-2-19 10-2-19 1,1-Dichloroethene ND 0.044 EPA 8260D 10-2-19 10-2-19 Acetone ND 0.57 EPA 8260D 10-2-19 10-2-19 Iodomethane ND 0.22 EPA 8260D 10-2-19 10-2-19 Carbon Disulfide ND 0.044 EPA 8260D 10-2-19 10-2-19 Methylene Chloride ND 0.22 EPA 8260D 10-2-19 10-2-19 (trans) 1,2-Dichloroethene ND 0.044 EPA 8260D 10-2-19 10-2-19 Methyl t-Butyl Ether ND 0.044 EPA 8260D 10-2-19 10-2-19 1,1-Dichloroethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Vinyl Acetate ND 0.22 EPA 8260D 10-2-19 10-2-19 2,2-Dichloropropane ND 0.044 EPA 8260D 10-2-19 10-2-19 (cis) 1,2-Dichloroethene ND 0.044 EPA 8260D 10-2-19 10-2-19 2-Butanone ND 0.22 EPA 8260D 10-2-19 10-2-19 Bromochloromethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Chloroform ND 0.044 EPA 8260D 10-2-19 10-2-19 1,1,1-Trichloroethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Carbon Tetrachloride ND 0.044 EPA 8260D 10-2-19 10-2-19 1,1-Dichloropropene ND 0.044 EPA 8260D 10-2-19 10-2-19 Benzene ND 0.044 EPA 8260D 10-2-19 10-2-19 1,2-Dichloroethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Trichloroethene ND 0.044 EPA 8260D 10-2-19 10-2-19 1,2-Dichloropropane ND 0.044 EPA 8260D 10-2-19 10-2-19 Dibromomethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Bromodichloromethane ND 0.044 EPA 8260D 10-2-19 10-2-19 2-Chloroethyl Vinyl Ether ND 0.22 EPA 8260D 10-2-19 10-2-19 (cis) 1,3-Dichloropropene ND 0.044 EPA 8260D 10-2-19 10-2-19 Methyl Isobutyl Ketone ND 0.22 EPA 8260D 10-2-19 10-2-19 Toluene ND 0.22 EPA 8260D 10-2-19 10-2-19 (trans) 1,3-Dichloropropene ND 0.044 EPA 8260D 10-2-19 10-2-19 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KLF11-5-15' Laboratory ID: 09-292-01 1,1,2-Trichloroethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Tetrachloroethene ND 0.044 EPA 8260D 10-2-19 10-2-19 1,3-Dichloropropane ND 0.044 EPA 8260D 10-2-19 10-2-19 2-Hexanone ND 0.22 EPA 8260D 10-2-19 10-2-19 Dibromochloromethane ND 0.044 EPA 8260D 10-2-19 10-2-19 1,2-Dibromoethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Chlorobenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 1,1,1,2-Tetrachloroethane ND 0.044 EPA 8260D 10-2-19 10-2-19 Ethylbenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 m,p-Xylene ND 0.088 EPA 8260D 10-2-19 10-2-19 o-Xylene ND 0.044 EPA 8260D 10-2-19 10-2-19 Styrene ND 0.044 EPA 8260D 10-2-19 10-2-19 Bromoform ND 0.22 EPA 8260D 10-2-19 10-2-19 Isopropylbenzene 0.13 0.044 EPA 8260D 10-2-19 10-2-19 Bromobenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 1,1,2,2-Tetrachloroethane ND 0.044 EPA 8260D 10-2-19 10-2-19 1,2,3-Trichloropropane ND 0.044 EPA 8260D 10-2-19 10-2-19 n-Propylbenzene 0.43 0.044 EPA 8260D 10-2-19 10-2-19 2-Chlorotoluene ND 0.044 EPA 8260D 10-2-19 10-2-19 4-Chlorotoluene ND 0.044 EPA 8260D 10-2-19 10-2-19 1,3,5-Trimethylbenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 tert-Butylbenzene 0.051 0.044 EPA 8260D 10-2-19 10-2-19 1,2,4-Trimethylbenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 sec-Butylbenzene 1.2 0.044 EPA 8260D 10-2-19 10-2-19 1,3-Dichlorobenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 p-Isopropyltoluene 0.17 0.044 EPA 8260D 10-2-19 10-2-19 1,4-Dichlorobenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 1,2-Dichlorobenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 n-Butylbenzene 1.8 0.044 EPA 8260D 10-2-19 10-2-19 Y 1,2-Dibromo-3-chloropropane ND 0.22 EPA 8260D 10-2-19 10-2-19 1,2,4-Trichlorobenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 Hexachlorobutadiene ND 0.22 EPA 8260D 10-2-19 10-2-19 Naphthalene ND 0.044 EPA 8260D 10-2-19 10-2-19 1,2,3-Trichlorobenzene ND 0.044 EPA 8260D 10-2-19 10-2-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 100 76-131 Toluene-d8 138 78-128 Q 4-Bromofluorobenzene 102 71-130 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1002S1 Dichlorodifluoromethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Chloromethane ND 0.0050 EPA 8260D 10-2-19 10-2-19 Vinyl Chloride ND 0.0010 EPA 8260D 10-2-19 10-2-19 Bromomethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Chloroethane ND 0.0050 EPA 8260D 10-2-19 10-2-19 Trichlorofluoromethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,1-Dichloroethene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Acetone ND 0.013 EPA 8260D 10-2-19 10-2-19 Iodomethane ND 0.0050 EPA 8260D 10-2-19 10-2-19 Carbon Disulfide ND 0.0010 EPA 8260D 10-2-19 10-2-19 Methylene Chloride ND 0.0050 EPA 8260D 10-2-19 10-2-19 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Methyl t-Butyl Ether ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,1-Dichloroethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Vinyl Acetate ND 0.0050 EPA 8260D 10-2-19 10-2-19 2,2-Dichloropropane ND 0.0010 EPA 8260D 10-2-19 10-2-19 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260D 10-2-19 10-2-19 2-Butanone ND 0.0050 EPA 8260D 10-2-19 10-2-19 Bromochloromethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Chloroform ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,1,1-Trichloroethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Carbon Tetrachloride ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,1-Dichloropropene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Benzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,2-Dichloroethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Trichloroethene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,2-Dichloropropane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Dibromomethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Bromodichloromethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260D 10-2-19 10-2-19 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Methyl Isobutyl Ketone ND 0.0050 EPA 8260D 10-2-19 10-2-19 Toluene ND 0.0050 EPA 8260D 10-2-19 10-2-19 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260D 10-2-19 10-2-19 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1002S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Tetrachloroethene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,3-Dichloropropane ND 0.0010 EPA 8260D 10-2-19 10-2-19 2-Hexanone ND 0.0050 EPA 8260D 10-2-19 10-2-19 Dibromochloromethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,2-Dibromoethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Chlorobenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 Ethylbenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 m,p-Xylene ND 0.0020 EPA 8260D 10-2-19 10-2-19 o-Xylene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Styrene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Bromoform ND 0.0050 EPA 8260D 10-2-19 10-2-19 Isopropylbenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Bromobenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,2,3-Trichloropropane ND 0.0010 EPA 8260D 10-2-19 10-2-19 n-Propylbenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 2-Chlorotoluene ND 0.0010 EPA 8260D 10-2-19 10-2-19 4-Chlorotoluene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 tert-Butylbenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 sec-Butylbenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,3-Dichlorobenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 p-Isopropyltoluene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,4-Dichlorobenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,2-Dichlorobenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 n-Butylbenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260D 10-2-19 10-2-19 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Hexachlorobutadiene ND 0.0050 EPA 8260D 10-2-19 10-2-19 Naphthalene ND 0.0010 EPA 8260D 10-2-19 10-2-19 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260D 10-2-19 10-2-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 76-131 Toluene-d8 98 78-128 4-Bromofluorobenzene 92 71-130 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1002S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0488 0.0476 0.0500 0.0500 98 95 57-133 2 18 Benzene 0.0482 0.0472 0.0500 0.0500 96 94 71-129 2 16 Trichloroethene 0.0499 0.0479 0.0500 0.0500 100 96 71-122 4 16 Toluene 0.0483 0.0468 0.0500 0.0500 97 94 74-125 3 15 Chlorobenzene 0.0497 0.0485 0.0500 0.0500 99 97 72-120 2 14 Surrogate: Dibromofluoromethane 98 99 76-131 Toluene-d8 97 98 78-128 4-Bromofluorobenzene 98 97 71-130 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: October 10, 2019 Samples Submitted: September 26, 2019 Laboratory Reference: 1909-292 Project: 20181376 % MOISTURE Date Client ID Lab ID % Moisture Analyzed KLF11-5-15' 09-292-01 11 10-1-19 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052  (425) 883-3881 December 26, 2019 Marcus Byers Kleinfelder 14710 NE 87th Street, Suite 100 Redmond, WA 98052 Re: Analytical Data for Project 20181376 Laboratory Reference No. 1912-167 Dear Marcus: Enclosed are the analytical results and associated quality control data for samples submitted on December 17, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 Case Narrative Samples were collected on December 17, 2019 and received by the laboratory on December 17, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. Volatiles EPA 8260C Analysis Sodium Bisulfate preservation has been proven to increase the frequency of detection and the concentration of Acetone and 2-Butanone due in part to chemical reactions in the sample. If Acetone is a potential site contaminant, Sodium Bisulfate should not be used. Any other QA/QC issues associated with this extraction and analysis will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-10-8-10 Laboratory ID: 12-167-01 Gasoline ND 8.4 NWTPH-Gx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 90 58-129 Client ID: MW-9-8-10 Laboratory ID: 12-167-03 Gasoline ND 6.9 NWTPH-Gx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 88 58-129 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218S1 Gasoline ND 5.0 NWTPH-Gx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 78 58-129 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-185-01 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 73 77 58-129 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-9 Laboratory ID: 12-167-02 Gasoline ND 100 NWTPH-Gx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 94 59-122 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218W1 Gasoline ND 100 NWTPH-Gx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 93 59-122 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-163-01 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 94 94 59-122 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-10-8-10 Laboratory ID: 12-167-01 Diesel Range Organics ND 31 NWTPH-Dx 12-18-19 12-18-19 Lube Oil Range Organics ND 62 NWTPH-Dx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 69 50-150 Client ID: MW-9-8-10 Laboratory ID: 12-167-03 Diesel Range Organics ND 33 NWTPH-Dx 12-18-19 12-18-19 Lube Oil Range Organics ND 65 NWTPH-Dx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 72 50-150 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218S2 Diesel Range Organics ND 25 NWTPH-Dx 12-18-19 12-18-19 Lube Oil Range Organics ND 50 NWTPH-Dx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 105 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-109-03 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 75 58 50-150 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-9 Laboratory ID: 12-167-02 Diesel Range Organics ND 0.20 NWTPH-Dx 12-18-19 12-19-19 Lube Oil Range Organics ND 0.25 NWTPH-Dx 12-18-19 12-19-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 104 50-150 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218W1 Diesel Range Organics ND 0.20 NWTPH-Dx 12-18-19 12-18-19 Lube Oil Range Organics ND 0.20 NWTPH-Dx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 117 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB1218W1 ORIG DUP Diesel Fuel #2 0.488 0.459 NA NA NA NA 6 NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 103 93 50-150 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-10-8-10 Laboratory ID: 12-167-01 Dichlorodifluoromethane ND 0.0015 EPA 8260D 12-18-19 12-18-19 Chloromethane ND 0.0059 EPA 8260D 12-18-19 12-18-19 Vinyl Chloride ND 0.0012 EPA 8260D 12-18-19 12-18-19 Bromomethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Chloroethane ND 0.0059 EPA 8260D 12-18-19 12-18-19 Trichlorofluoromethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Acetone ND 0.059 EPA 8260D 12-18-19 12-18-19 Iodomethane ND 0.0059 EPA 8260D 12-18-19 12-18-19 Carbon Disulfide ND 0.0012 EPA 8260D 12-18-19 12-18-19 Methylene Chloride ND 0.0059 EPA 8260D 12-18-19 12-18-19 (trans) 1,2-Dichloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Methyl t-Butyl Ether ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Vinyl Acetate ND 0.0059 EPA 8260D 12-18-19 12-18-19 2,2-Dichloropropane ND 0.0012 EPA 8260D 12-18-19 12-18-19 (cis) 1,2-Dichloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 2-Butanone ND 0.012 EPA 8260D 12-18-19 12-18-19 Bromochloromethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Chloroform ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1,1-Trichloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Carbon Tetrachloride ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1-Dichloropropene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Benzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dichloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Trichloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dichloropropane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Dibromomethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Bromodichloromethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 2-Chloroethyl Vinyl Ether ND 0.0059 EPA 8260D 12-18-19 12-18-19 (cis) 1,3-Dichloropropene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Methyl Isobutyl Ketone ND 0.0059 EPA 8260D 12-18-19 12-18-19 Toluene ND 0.0059 EPA 8260D 12-18-19 12-18-19 (trans) 1,3-Dichloropropene ND 0.0012 EPA 8260D 12-18-19 12-18-19 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-10-8-10 Laboratory ID: 12-167-01 1,1,2-Trichloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Tetrachloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,3-Dichloropropane ND 0.0012 EPA 8260D 12-18-19 12-18-19 2-Hexanone ND 0.0059 EPA 8260D 12-18-19 12-18-19 Dibromochloromethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dibromoethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Chlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1,1,2-Tetrachloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Ethylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 m,p-Xylene ND 0.0024 EPA 8260D 12-18-19 12-18-19 o-Xylene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Styrene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Bromoform ND 0.0059 EPA 8260D 12-18-19 12-18-19 Isopropylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Bromobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1,2,2-Tetrachloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichloropropane ND 0.0012 EPA 8260D 12-18-19 12-18-19 n-Propylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 2-Chlorotoluene ND 0.0012 EPA 8260D 12-18-19 12-18-19 4-Chlorotoluene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,3,5-Trimethylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 tert-Butylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2,4-Trimethylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 sec-Butylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,3-Dichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 p-Isopropyltoluene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,4-Dichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 n-Butylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dibromo-3-chloropropane ND 0.0059 EPA 8260D 12-18-19 12-18-19 1,2,4-Trichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Hexachlorobutadiene ND 0.0059 EPA 8260D 12-18-19 12-18-19 Naphthalene ND 0.0059 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 113 76-131 Toluene-d8 110 78-128 4-Bromofluorobenzene 100 71-130 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-9-8-10 Laboratory ID: 12-167-03 Dichlorodifluoromethane ND 0.0015 EPA 8260D 12-18-19 12-18-19 Chloromethane ND 0.0058 EPA 8260D 12-18-19 12-18-19 Vinyl Chloride ND 0.0012 EPA 8260D 12-18-19 12-18-19 Bromomethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Chloroethane ND 0.0058 EPA 8260D 12-18-19 12-18-19 Trichlorofluoromethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Acetone ND 0.058 EPA 8260D 12-18-19 12-18-19 Iodomethane ND 0.0058 EPA 8260D 12-18-19 12-18-19 Carbon Disulfide ND 0.0012 EPA 8260D 12-18-19 12-18-19 Methylene Chloride ND 0.0058 EPA 8260D 12-18-19 12-18-19 (trans) 1,2-Dichloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Methyl t-Butyl Ether ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Vinyl Acetate ND 0.0058 EPA 8260D 12-18-19 12-18-19 2,2-Dichloropropane ND 0.0012 EPA 8260D 12-18-19 12-18-19 (cis) 1,2-Dichloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 2-Butanone ND 0.012 EPA 8260D 12-18-19 12-18-19 Bromochloromethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Chloroform ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1,1-Trichloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Carbon Tetrachloride ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1-Dichloropropene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Benzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dichloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Trichloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dichloropropane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Dibromomethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Bromodichloromethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 2-Chloroethyl Vinyl Ether ND 0.0058 EPA 8260D 12-18-19 12-18-19 (cis) 1,3-Dichloropropene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Methyl Isobutyl Ketone ND 0.0058 EPA 8260D 12-18-19 12-18-19 Toluene ND 0.0058 EPA 8260D 12-18-19 12-18-19 (trans) 1,3-Dichloropropene ND 0.0012 EPA 8260D 12-18-19 12-18-19 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-9-8-10 Laboratory ID: 12-167-03 1,1,2-Trichloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Tetrachloroethene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,3-Dichloropropane ND 0.0012 EPA 8260D 12-18-19 12-18-19 2-Hexanone ND 0.0058 EPA 8260D 12-18-19 12-18-19 Dibromochloromethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dibromoethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Chlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1,1,2-Tetrachloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 Ethylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 m,p-Xylene ND 0.0023 EPA 8260D 12-18-19 12-18-19 o-Xylene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Styrene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Bromoform ND 0.0058 EPA 8260D 12-18-19 12-18-19 Isopropylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Bromobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,1,2,2-Tetrachloroethane ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichloropropane ND 0.0012 EPA 8260D 12-18-19 12-18-19 n-Propylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 2-Chlorotoluene ND 0.0012 EPA 8260D 12-18-19 12-18-19 4-Chlorotoluene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,3,5-Trimethylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 tert-Butylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2,4-Trimethylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 sec-Butylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,3-Dichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 p-Isopropyltoluene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,4-Dichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 n-Butylbenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 1,2-Dibromo-3-chloropropane ND 0.0058 EPA 8260D 12-18-19 12-18-19 1,2,4-Trichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Hexachlorobutadiene ND 0.0058 EPA 8260D 12-18-19 12-18-19 Naphthalene ND 0.0058 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichlorobenzene ND 0.0012 EPA 8260D 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 111 76-131 Toluene-d8 105 78-128 4-Bromofluorobenzene 100 71-130 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218S1 Dichlorodifluoromethane ND 0.0013 EPA 8260D 12-18-19 12-18-19 Chloromethane ND 0.0050 EPA 8260D 12-18-19 12-18-19 Vinyl Chloride ND 0.0010 EPA 8260D 12-18-19 12-18-19 Bromomethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Chloroethane ND 0.0050 EPA 8260D 12-18-19 12-18-19 Trichlorofluoromethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Acetone ND 0.050 EPA 8260D 12-18-19 12-18-19 Iodomethane ND 0.0050 EPA 8260D 12-18-19 12-18-19 Carbon Disulfide ND 0.0010 EPA 8260D 12-18-19 12-18-19 Methylene Chloride ND 0.0050 EPA 8260D 12-18-19 12-18-19 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Methyl t-Butyl Ether ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Vinyl Acetate ND 0.0050 EPA 8260D 12-18-19 12-18-19 2,2-Dichloropropane ND 0.0010 EPA 8260D 12-18-19 12-18-19 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260D 12-18-19 12-18-19 2-Butanone ND 0.010 EPA 8260D 12-18-19 12-18-19 Bromochloromethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Chloroform ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,1,1-Trichloroethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Carbon Tetrachloride ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,1-Dichloropropene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Benzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,2-Dichloroethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Trichloroethene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,2-Dichloropropane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Dibromomethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Bromodichloromethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260D 12-18-19 12-18-19 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Methyl Isobutyl Ketone ND 0.0050 EPA 8260D 12-18-19 12-18-19 Toluene ND 0.0050 EPA 8260D 12-18-19 12-18-19 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260D 12-18-19 12-18-19 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Tetrachloroethene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,3-Dichloropropane ND 0.0010 EPA 8260D 12-18-19 12-18-19 2-Hexanone ND 0.0050 EPA 8260D 12-18-19 12-18-19 Dibromochloromethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,2-Dibromoethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Chlorobenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 Ethylbenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 m,p-Xylene ND 0.0020 EPA 8260D 12-18-19 12-18-19 o-Xylene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Styrene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Bromoform ND 0.0050 EPA 8260D 12-18-19 12-18-19 Isopropylbenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Bromobenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichloropropane ND 0.0010 EPA 8260D 12-18-19 12-18-19 n-Propylbenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 2-Chlorotoluene ND 0.0010 EPA 8260D 12-18-19 12-18-19 4-Chlorotoluene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 tert-Butylbenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 sec-Butylbenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,3-Dichlorobenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 p-Isopropyltoluene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,4-Dichlorobenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,2-Dichlorobenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 n-Butylbenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260D 12-18-19 12-18-19 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Hexachlorobutadiene ND 0.0050 EPA 8260D 12-18-19 12-18-19 Naphthalene ND 0.0050 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260D 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 107 76-131 Toluene-d8 105 78-128 4-Bromofluorobenzene 102 71-130 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1218S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0476 0.0488 0.0500 0.0500 95 98 57-133 2 18 Benzene 0.0572 0.0593 0.0500 0.0500 114 119 71-129 4 16 Trichloroethene 0.0537 0.0578 0.0500 0.0500 107 116 71-122 7 16 Toluene 0.0561 0.0584 0.0500 0.0500 112 117 74-125 4 15 Chlorobenzene 0.0497 0.0533 0.0500 0.0500 99 107 72-120 7 14 Surrogate: Dibromofluoromethane 106 105 76-131 Toluene-d8 107 108 78-128 4-Bromofluorobenzene 104 106 71-130 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-9 Laboratory ID: 12-167-02 Dichlorodifluoromethane ND 0.29 EPA 8260D 12-18-19 12-18-19 Chloromethane ND 1.0 EPA 8260D 12-18-19 12-18-19 Vinyl Chloride ND 0.20 EPA 8260D 12-18-19 12-18-19 Bromomethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Chloroethane ND 1.0 EPA 8260D 12-18-19 12-18-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 Acetone ND 5.0 EPA 8260D 12-18-19 12-18-19 Iodomethane ND 1.0 EPA 8260D 12-18-19 12-18-19 Carbon Disulfide ND 0.20 EPA 8260D 12-18-19 12-18-19 Methylene Chloride ND 1.0 EPA 8260D 12-18-19 12-18-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Vinyl Acetate ND 1.0 EPA 8260D 12-18-19 12-18-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-18-19 12-18-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 2-Butanone ND 5.0 EPA 8260D 12-18-19 12-18-19 Bromochloromethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Chloroform ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-18-19 12-18-19 Benzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Trichloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-18-19 12-18-19 Dibromomethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Bromodichloromethane ND 0.20 EPA 8260D 12-18-19 12-18-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-18-19 12-18-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-18-19 12-18-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-18-19 12-18-19 Toluene ND 1.0 EPA 8260D 12-18-19 12-18-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-18-19 12-18-19 19 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-9 Laboratory ID: 12-167-02 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Tetrachloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-18-19 12-18-19 2-Hexanone ND 2.0 EPA 8260D 12-18-19 12-18-19 Dibromochloromethane ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Chlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Ethylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 m,p-Xylene ND 0.40 EPA 8260D 12-18-19 12-18-19 o-Xylene ND 0.20 EPA 8260D 12-18-19 12-18-19 Styrene ND 0.20 EPA 8260D 12-18-19 12-18-19 Bromoform ND 1.0 EPA 8260D 12-18-19 12-18-19 Isopropylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 Bromobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-18-19 12-18-19 n-Propylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-18-19 12-18-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 n-Butylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-18-19 12-18-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-18-19 12-18-19 Naphthalene ND 1.0 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 99 75-127 Toluene-d8 100 80-127 4-Bromofluorobenzene 104 78-125 20 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218W1 Dichlorodifluoromethane ND 0.29 EPA 8260D 12-18-19 12-18-19 Chloromethane ND 1.0 EPA 8260D 12-18-19 12-18-19 Vinyl Chloride ND 0.20 EPA 8260D 12-18-19 12-18-19 Bromomethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Chloroethane ND 1.0 EPA 8260D 12-18-19 12-18-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 Acetone ND 5.0 EPA 8260D 12-18-19 12-18-19 Iodomethane ND 1.0 EPA 8260D 12-18-19 12-18-19 Carbon Disulfide ND 0.20 EPA 8260D 12-18-19 12-18-19 Methylene Chloride ND 1.0 EPA 8260D 12-18-19 12-18-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Vinyl Acetate ND 1.0 EPA 8260D 12-18-19 12-18-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-18-19 12-18-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 2-Butanone ND 5.0 EPA 8260D 12-18-19 12-18-19 Bromochloromethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Chloroform ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-18-19 12-18-19 Benzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Trichloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-18-19 12-18-19 Dibromomethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Bromodichloromethane ND 0.20 EPA 8260D 12-18-19 12-18-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-18-19 12-18-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-18-19 12-18-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-18-19 12-18-19 Toluene ND 1.0 EPA 8260D 12-18-19 12-18-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-18-19 12-18-19 21 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218W1 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Tetrachloroethene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-18-19 12-18-19 2-Hexanone ND 2.0 EPA 8260D 12-18-19 12-18-19 Dibromochloromethane ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Chlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 Ethylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 m,p-Xylene ND 0.40 EPA 8260D 12-18-19 12-18-19 o-Xylene ND 0.20 EPA 8260D 12-18-19 12-18-19 Styrene ND 0.20 EPA 8260D 12-18-19 12-18-19 Bromoform ND 1.0 EPA 8260D 12-18-19 12-18-19 Isopropylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 Bromobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-18-19 12-18-19 n-Propylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-18-19 12-18-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 n-Butylbenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-18-19 12-18-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-18-19 12-18-19 Naphthalene ND 1.0 EPA 8260D 12-18-19 12-18-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 75-127 Toluene-d8 99 80-127 4-Bromofluorobenzene 101 78-125 22 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Water Units: ug/L Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1218W1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 9.61 9.98 10.0 10.0 96 100 63-130 4 17 Benzene 9.62 10.0 10.0 10.0 96 100 76-125 4 19 Trichloroethene 9.97 10.3 10.0 10.0 100 103 76-121 3 18 Toluene 9.72 10.2 10.0 10.0 97 102 80-124 5 18 Chlorobenzene 9.68 9.89 10.0 10.0 97 99 75-120 2 19 Surrogate: Dibromofluoromethane 95 96 75-127 Toluene-d8 98 96 80-127 4-Bromofluorobenzene 101 102 78-125 23 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 TOTAL LEAD EPA 6010D Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-10-8-10 Laboratory ID: 12-167-01 Lead ND 6.2 EPA 6010D 12-18-19 12-19-19 Client ID: MW-9-8-10 Laboratory ID: 12-167-03 Lead ND 6.5 EPA 6010D 12-18-19 12-19-19 24 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 TOTAL LEAD EPA 6010D QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218SM1 Lead ND 5.0 EPA 6010D 12-18-19 12-19-19 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-154-02 ORIG DUP Lead ND ND NA NA NA NA NA 20 MATRIX SPIKES Laboratory ID: 12-154-02 MS MSD MS MSD MS MSD Lead 242 241 250 250 ND 97 97 75-125 0 20 25 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 17, 2019 Laboratory Reference: 1912-167 Project: 20181376 % MOISTURE Date Client ID Lab ID % Moisture Analyzed MW-10-8-10 12-167-01 20 12-18-19 MW-9-8-10 12-167-03 23 12-18-19 26 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052  (425) 883-3881 December 26, 2019 Marcus Byers Kleinfelder 14710 NE 87th Street, Suite 100 Redmond, WA 98052 Re: Analytical Data for Project 20181376 Laboratory Reference No. 1912-153 Dear Marcus: Enclosed are the analytical results and associated quality control data for samples submitted on December 16, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 Case Narrative Samples were collected on December 16, 2019 and received by the laboratory on December 16, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12 Laboratory ID: 12-153-01 Gasoline 180 100 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 95 59-122 Client ID: MW-13 Laboratory ID: 12-153-03 Gasoline ND 100 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 95 59-122 Client ID: MW-11 Laboratory ID: 12-153-05 Gasoline ND 100 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 94 59-122 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217W1 Gasoline ND 100 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 93 59-122 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-153-01 ORIG DUP Gasoline 183 180 NA NA NA NA 2 30 Surrogate: Fluorobenzene 95 96 59-122 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 Gasoline ND 6.9 NWTPH-Gx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 80 58-129 Client ID: MW-13-8-10 Laboratory ID: 12-153-04 Gasoline ND 8.2 NWTPH-Gx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 78 58-129 Client ID: MW-11-8-10 Laboratory ID: 12-153-06 Gasoline ND 7.8 NWTPH-Gx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 76 58-129 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217S1 Gasoline ND 5.0 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 76 58-129 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-159-01 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 82 82 58-129 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12 Laboratory ID: 12-153-01 Diesel Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 106 50-150 Client ID: MW-13 Laboratory ID: 12-153-03 Diesel Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 104 50-150 Client ID: MW-11 Laboratory ID: 12-153-05 Diesel Range Organics ND 0.23 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 0.23 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217W1 Diesel Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 138 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-081-01 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 106 111 50-150 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 Diesel Range Organics ND 34 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 68 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 75 50-150 Client ID: MW-13-8-10 Laboratory ID: 12-153-04 Diesel Range Organics ND 35 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 71 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 64 50-150 Client ID: MW-11-8-10 Laboratory ID: 12-153-06 Diesel Range Organics ND 35 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 69 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 57 50-150 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217S2 Diesel Range Organics ND 25 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 50 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 99 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-153-02 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 75 65 50-150 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12 Laboratory ID: 12-153-01 Dichlorodifluoromethane ND 0.27 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Acetone ND 5.0 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.20 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 1.0 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 5.0 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-17-19 12-17-19 Toluene ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12 Laboratory ID: 12-153-01 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 2.0 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.40 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.20 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromoform ND 1.0 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene 0.55 0.20 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene 0.22 0.20 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene 0.72 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 105 75-127 Toluene-d8 105 80-127 4-Bromofluorobenzene 107 78-125 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-13 Laboratory ID: 12-153-03 Dichlorodifluoromethane ND 0.27 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Acetone ND 5.0 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.20 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 1.0 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 5.0 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Trichloroethene 0.24 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-17-19 12-17-19 Toluene ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-13 Laboratory ID: 12-153-03 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 2.0 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.40 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.20 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromoform ND 1.0 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 99 75-127 Toluene-d8 102 80-127 4-Bromofluorobenzene 103 78-125 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-11 Laboratory ID: 12-153-05 Dichlorodifluoromethane ND 0.27 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Acetone ND 5.0 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.20 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 1.0 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 5.0 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-17-19 12-17-19 Toluene ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-11 Laboratory ID: 12-153-05 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 2.0 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.40 EPA 8260D 12-17-19 12-17-19 o-Xylene 0.22 0.20 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromoform ND 1.0 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 100 75-127 Toluene-d8 102 80-127 4-Bromofluorobenzene 104 78-125 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217W2 Dichlorodifluoromethane ND 0.27 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Acetone ND 5.0 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.20 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 1.0 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 5.0 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-17-19 12-17-19 Toluene ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217W2 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 2.0 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.40 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.20 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromoform ND 1.0 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 75-127 Toluene-d8 99 80-127 4-Bromofluorobenzene 98 78-125 19 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Water Units: ug/L Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1217W2 SB SBD SB SBD SB SBD 1,1-Dichloroethene 9.87 10.3 10.0 10.0 99 103 63-130 4 17 Benzene 9.77 10.2 10.0 10.0 98 102 76-125 4 19 Trichloroethene 9.84 10.8 10.0 10.0 98 108 76-121 9 18 Toluene 9.85 10.8 10.0 10.0 99 108 80-124 9 18 Chlorobenzene 9.93 10.6 10.0 10.0 99 106 75-120 7 19 Surrogate: Dibromofluoromethane 100 97 75-127 Toluene-d8 100 100 80-127 4-Bromofluorobenzene 101 100 78-125 20 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 Dichlorodifluoromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 0.0065 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 0.0065 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Acetone ND 0.065 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 0.0065 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 0.0065 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 0.0065 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 0.013 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 0.0065 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 0.0065 EPA 8260D 12-17-19 12-17-19 Toluene ND 0.0065 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 21 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 1,1,2-Trichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 0.0065 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.0026 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromoform ND 0.0065 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 0.0065 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 0.0065 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 0.0065 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 108 76-131 Toluene-d8 106 78-128 4-Bromofluorobenzene 99 71-130 22 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-13-8-10 Laboratory ID: 12-153-04 Dichlorodifluoromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 0.0069 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.0014 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 0.0069 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Acetone ND 0.069 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 0.0069 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.0014 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 0.0069 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 0.0069 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.0014 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 0.014 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 0.0069 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 0.0069 EPA 8260D 12-17-19 12-17-19 Toluene ND 0.0069 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.0014 EPA 8260D 12-17-19 12-17-19 23 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-13-8-10 Laboratory ID: 12-153-04 1,1,2-Trichloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.0014 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 0.0069 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.0027 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Bromoform ND 0.0069 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.0014 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.0014 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 0.0069 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 0.0069 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 0.0069 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 109 76-131 Toluene-d8 105 78-128 4-Bromofluorobenzene 102 71-130 24 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-11-8-10 Laboratory ID: 12-153-06 Dichlorodifluoromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 0.0064 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 0.0064 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Acetone ND 0.064 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 0.0064 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 0.0064 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 0.0064 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 0.013 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 0.0064 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 0.0064 EPA 8260D 12-17-19 12-17-19 Toluene ND 0.0064 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 25 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-11-8-10 Laboratory ID: 12-153-06 1,1,2-Trichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 0.0064 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.0026 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromoform ND 0.0064 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 0.0064 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 0.0064 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 0.0064 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 109 76-131 Toluene-d8 105 78-128 4-Bromofluorobenzene 100 71-130 26 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217S1 Dichlorodifluoromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 0.0050 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.0010 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 0.0050 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Acetone ND 0.050 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 0.0050 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.0010 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 0.0050 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 0.0050 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.0010 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 0.010 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 0.0050 EPA 8260D 12-17-19 12-17-19 Toluene ND 0.0050 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260D 12-17-19 12-17-19 27 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.0010 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 0.0050 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.0020 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Bromoform ND 0.0050 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.0010 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.0010 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 0.0050 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 0.0050 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 109 76-131 Toluene-d8 108 78-128 4-Bromofluorobenzene 101 71-130 28 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1217S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0491 0.0508 0.0500 0.0500 98 102 57-133 3 18 Benzene 0.0605 0.0582 0.0500 0.0500 121 116 71-129 4 16 Trichloroethene 0.0568 0.0560 0.0500 0.0500 114 112 71-122 1 16 Toluene 0.0593 0.0590 0.0500 0.0500 119 118 74-125 1 15 Chlorobenzene 0.0527 0.0531 0.0500 0.0500 105 106 72-120 1 14 Surrogate: Dibromofluoromethane 104 103 76-131 Toluene-d8 106 106 78-128 4-Bromofluorobenzene 105 104 71-130 29 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 TOTAL LEAD EPA 6010D Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 Lead ND 6.8 EPA 6010D 12-18-19 12-19-19 Client ID: MW-13-8-10 Laboratory ID: 12-153-04 Lead ND 7.1 EPA 6010D 12-18-19 12-19-19 Client ID: MW-11-8-10 Laboratory ID: 12-153-06 Lead ND 6.9 EPA 6010D 12-18-19 12-19-19 30 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 TOTAL LEAD EPA 6010D QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218SM1 Lead ND 5.0 EPA 6010D 12-18-19 12-19-19 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-154-02 ORIG DUP Lead ND ND NA NA NA NA NA 20 MATRIX SPIKES Laboratory ID: 12-154-02 MS MSD MS MSD MS MSD Lead 242 241 250 250 ND 97 97 75-125 0 20 31 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 % MOISTURE Date Client ID Lab ID % Moisture Analyzed MW-12-7-9 12-153-02 26 12-17-19 MW-13-8-10 12-153-04 29 12-17-19 MW-11-8-10 12-153-06 28 12-17-19 32 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052  (425) 883-3881 December 26, 2019 Marcus Byers Kleinfelder 14710 NE 87th Street, Suite 100 Redmond, WA 98052 Re: Analytical Data for Project 20181376 Laboratory Reference No. 1912-153 Dear Marcus: Enclosed are the analytical results and associated quality control data for samples submitted on December 16, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 Case Narrative Samples were collected on December 16, 2019 and received by the laboratory on December 16, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12 Laboratory ID: 12-153-01 Gasoline 180 100 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 95 59-122 Client ID: MW-13 Laboratory ID: 12-153-03 Gasoline ND 100 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 95 59-122 Client ID: MW-11 Laboratory ID: 12-153-05 Gasoline ND 100 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 94 59-122 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217W1 Gasoline ND 100 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 93 59-122 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-153-01 ORIG DUP Gasoline 183 180 NA NA NA NA 2 30 Surrogate: Fluorobenzene 95 96 59-122 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 Gasoline ND 6.9 NWTPH-Gx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 80 58-129 Client ID: MW-13-8-10 Laboratory ID: 12-153-04 Gasoline ND 8.2 NWTPH-Gx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 78 58-129 Client ID: MW-11-8-10 Laboratory ID: 12-153-06 Gasoline ND 7.8 NWTPH-Gx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 76 58-129 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Soil Units: mg/kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217S1 Gasoline ND 5.0 NWTPH-Gx 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 76 58-129 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-159-01 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 82 82 58-129 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12 Laboratory ID: 12-153-01 Diesel Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 106 50-150 Client ID: MW-13 Laboratory ID: 12-153-03 Diesel Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 104 50-150 Client ID: MW-11 Laboratory ID: 12-153-05 Diesel Range Organics ND 0.23 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 0.23 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217W1 Diesel Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 0.20 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 138 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-081-01 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 106 111 50-150 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 Diesel Range Organics ND 34 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 68 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 75 50-150 Client ID: MW-13-8-10 Laboratory ID: 12-153-04 Diesel Range Organics ND 35 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 71 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 64 50-150 Client ID: MW-11-8-10 Laboratory ID: 12-153-06 Diesel Range Organics ND 35 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 69 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 57 50-150 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217S2 Diesel Range Organics ND 25 NWTPH-Dx 12-17-19 12-18-19 Lube Oil Range Organics ND 50 NWTPH-Dx 12-17-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 99 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-153-02 ORIG DUP Diesel Range ND ND NA NA NA NA NA NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 75 65 50-150 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12 Laboratory ID: 12-153-01 Dichlorodifluoromethane ND 0.27 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Acetone ND 5.0 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.20 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 1.0 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 5.0 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-17-19 12-17-19 Toluene ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12 Laboratory ID: 12-153-01 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 2.0 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.40 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.20 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromoform ND 1.0 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene 0.55 0.20 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene 0.22 0.20 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene 0.72 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 105 75-127 Toluene-d8 105 80-127 4-Bromofluorobenzene 107 78-125 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-13 Laboratory ID: 12-153-03 Dichlorodifluoromethane ND 0.27 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Acetone ND 5.0 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.20 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 1.0 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 5.0 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Trichloroethene 0.24 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-17-19 12-17-19 Toluene ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-13 Laboratory ID: 12-153-03 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 2.0 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.40 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.20 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromoform ND 1.0 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 99 75-127 Toluene-d8 102 80-127 4-Bromofluorobenzene 103 78-125 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-11 Laboratory ID: 12-153-05 Dichlorodifluoromethane ND 0.27 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Acetone ND 5.0 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.20 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 1.0 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 5.0 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-17-19 12-17-19 Toluene ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-11 Laboratory ID: 12-153-05 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 2.0 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.40 EPA 8260D 12-17-19 12-17-19 o-Xylene 0.22 0.20 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromoform ND 1.0 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 100 75-127 Toluene-d8 102 80-127 4-Bromofluorobenzene 104 78-125 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217W2 Dichlorodifluoromethane ND 0.27 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Acetone ND 5.0 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 1.0 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.20 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 1.0 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 5.0 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-17-19 12-17-19 Toluene ND 1.0 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-17-19 12-17-19 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217W2 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 2.0 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.40 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.20 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromoform ND 1.0 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 1.0 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 101 75-127 Toluene-d8 99 80-127 4-Bromofluorobenzene 98 78-125 19 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Water Units: ug/L Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1217W2 SB SBD SB SBD SB SBD 1,1-Dichloroethene 9.87 10.3 10.0 10.0 99 103 63-130 4 17 Benzene 9.77 10.2 10.0 10.0 98 102 76-125 4 19 Trichloroethene 9.84 10.8 10.0 10.0 98 108 76-121 9 18 Toluene 9.85 10.8 10.0 10.0 99 108 80-124 9 18 Chlorobenzene 9.93 10.6 10.0 10.0 99 106 75-120 7 19 Surrogate: Dibromofluoromethane 100 97 75-127 Toluene-d8 100 100 80-127 4-Bromofluorobenzene 101 100 78-125 20 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 Dichlorodifluoromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 0.0065 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 0.0065 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Acetone ND 0.065 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 0.0065 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 0.0065 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 0.0065 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 0.013 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 0.0065 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 0.0065 EPA 8260D 12-17-19 12-17-19 Toluene ND 0.0065 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 21 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 1,1,2-Trichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 0.0065 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.0026 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromoform ND 0.0065 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 0.0065 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 0.0065 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 0.0065 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 108 76-131 Toluene-d8 106 78-128 4-Bromofluorobenzene 99 71-130 22 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-13-8-10 Laboratory ID: 12-153-04 Dichlorodifluoromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 0.0069 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.0014 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 0.0069 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Acetone ND 0.069 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 0.0069 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.0014 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 0.0069 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 0.0069 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.0014 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 0.014 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 0.0069 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 0.0069 EPA 8260D 12-17-19 12-17-19 Toluene ND 0.0069 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.0014 EPA 8260D 12-17-19 12-17-19 23 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-13-8-10 Laboratory ID: 12-153-04 1,1,2-Trichloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.0014 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 0.0069 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.0027 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Bromoform ND 0.0069 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.0014 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.0014 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 0.0069 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 0.0069 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 0.0069 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.0014 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 109 76-131 Toluene-d8 105 78-128 4-Bromofluorobenzene 102 71-130 24 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-11-8-10 Laboratory ID: 12-153-06 Dichlorodifluoromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 0.0064 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 0.0064 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Acetone ND 0.064 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 0.0064 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 0.0064 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 0.0064 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 0.013 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 0.0064 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 0.0064 EPA 8260D 12-17-19 12-17-19 Toluene ND 0.0064 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.0013 EPA 8260D 12-17-19 12-17-19 25 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-11-8-10 Laboratory ID: 12-153-06 1,1,2-Trichloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 0.0064 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.0026 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromoform ND 0.0064 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.0013 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 0.0064 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 0.0064 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 0.0064 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.0013 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 109 76-131 Toluene-d8 105 78-128 4-Bromofluorobenzene 100 71-130 26 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Soil Units: mg/kg Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217S1 Dichlorodifluoromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Chloromethane ND 0.0050 EPA 8260D 12-17-19 12-17-19 Vinyl Chloride ND 0.0010 EPA 8260D 12-17-19 12-17-19 Bromomethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Chloroethane ND 0.0050 EPA 8260D 12-17-19 12-17-19 Trichlorofluoromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Acetone ND 0.050 EPA 8260D 12-17-19 12-17-19 Iodomethane ND 0.0050 EPA 8260D 12-17-19 12-17-19 Carbon Disulfide ND 0.0010 EPA 8260D 12-17-19 12-17-19 Methylene Chloride ND 0.0050 EPA 8260D 12-17-19 12-17-19 (trans) 1,2-Dichloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Methyl t-Butyl Ether ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1-Dichloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Vinyl Acetate ND 0.0050 EPA 8260D 12-17-19 12-17-19 2,2-Dichloropropane ND 0.0010 EPA 8260D 12-17-19 12-17-19 (cis) 1,2-Dichloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 2-Butanone ND 0.010 EPA 8260D 12-17-19 12-17-19 Bromochloromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Chloroform ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1,1-Trichloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Carbon Tetrachloride ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1-Dichloropropene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Benzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dichloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Trichloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dichloropropane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Dibromomethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Bromodichloromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 2-Chloroethyl Vinyl Ether ND 0.0050 EPA 8260D 12-17-19 12-17-19 (cis) 1,3-Dichloropropene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Methyl Isobutyl Ketone ND 0.0050 EPA 8260D 12-17-19 12-17-19 Toluene ND 0.0050 EPA 8260D 12-17-19 12-17-19 (trans) 1,3-Dichloropropene ND 0.0010 EPA 8260D 12-17-19 12-17-19 27 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1217S1 1,1,2-Trichloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Tetrachloroethene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,3-Dichloropropane ND 0.0010 EPA 8260D 12-17-19 12-17-19 2-Hexanone ND 0.0050 EPA 8260D 12-17-19 12-17-19 Dibromochloromethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dibromoethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Chlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1,1,2-Tetrachloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 Ethylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 m,p-Xylene ND 0.0020 EPA 8260D 12-17-19 12-17-19 o-Xylene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Styrene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Bromoform ND 0.0050 EPA 8260D 12-17-19 12-17-19 Isopropylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Bromobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,1,2,2-Tetrachloroethane ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichloropropane ND 0.0010 EPA 8260D 12-17-19 12-17-19 n-Propylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 2-Chlorotoluene ND 0.0010 EPA 8260D 12-17-19 12-17-19 4-Chlorotoluene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,3,5-Trimethylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 tert-Butylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2,4-Trimethylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 sec-Butylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,3-Dichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 p-Isopropyltoluene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,4-Dichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 n-Butylbenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 1,2-Dibromo-3-chloropropane ND 0.0050 EPA 8260D 12-17-19 12-17-19 1,2,4-Trichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Hexachlorobutadiene ND 0.0050 EPA 8260D 12-17-19 12-17-19 Naphthalene ND 0.0050 EPA 8260D 12-17-19 12-17-19 1,2,3-Trichlorobenzene ND 0.0010 EPA 8260D 12-17-19 12-17-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 109 76-131 Toluene-d8 108 78-128 4-Bromofluorobenzene 101 71-130 28 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Soil Units: mg/kg Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1217S1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 0.0491 0.0508 0.0500 0.0500 98 102 57-133 3 18 Benzene 0.0605 0.0582 0.0500 0.0500 121 116 71-129 4 16 Trichloroethene 0.0568 0.0560 0.0500 0.0500 114 112 71-122 1 16 Toluene 0.0593 0.0590 0.0500 0.0500 119 118 74-125 1 15 Chlorobenzene 0.0527 0.0531 0.0500 0.0500 105 106 72-120 1 14 Surrogate: Dibromofluoromethane 104 103 76-131 Toluene-d8 106 106 78-128 4-Bromofluorobenzene 105 104 71-130 29 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 TOTAL LEAD EPA 6010D Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-12-7-9 Laboratory ID: 12-153-02 Lead ND 6.8 EPA 6010D 12-18-19 12-19-19 Client ID: MW-13-8-10 Laboratory ID: 12-153-04 Lead ND 7.1 EPA 6010D 12-18-19 12-19-19 Client ID: MW-11-8-10 Laboratory ID: 12-153-06 Lead ND 6.9 EPA 6010D 12-18-19 12-19-19 30 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 TOTAL LEAD EPA 6010D QUALITY CONTROL Matrix: Soil Units: mg/Kg (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218SM1 Lead ND 5.0 EPA 6010D 12-18-19 12-19-19 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-154-02 ORIG DUP Lead ND ND NA NA NA NA NA 20 MATRIX SPIKES Laboratory ID: 12-154-02 MS MSD MS MSD MS MSD Lead 242 241 250 250 ND 97 97 75-125 0 20 31 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 26, 2019 Samples Submitted: December 16, 2019 Laboratory Reference: 1912-153 Project: 20181376 % MOISTURE Date Client ID Lab ID % Moisture Analyzed MW-12-7-9 12-153-02 26 12-17-19 MW-13-8-10 12-153-04 29 12-17-19 MW-11-8-10 12-153-06 28 12-17-19 32 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. 14648 NE 95th Street, Redmond, WA 98052  (425) 883-3881 December 27, 2019 Marcus Byers Kleinfelder 14710 NE 87th Street, Suite 100 Redmond, WA 98052 Re: Analytical Data for Project 20181376 Laboratory Reference No. 1912-176 Dear Marcus: Enclosed are the analytical results and associated quality control data for samples submitted on December 18, 2019. The standard policy of OnSite Environmental, Inc. is to store your samples for 30 days from the date of receipt. If you require longer storage, please contact the laboratory. We appreciate the opportunity to be of service to you on this project. If you have any questions concerning the data, or need additional information, please feel free to call me. Sincerely, David Baumeister Project Manager Enclosures 2 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 Case Narrative Samples were collected on December 18, 2019 and received by the laboratory on December 18, 2019. They were maintained at the laboratory at a temperature of 2oC to 6oC. Please note that any and all soil sample results are reported on a dry-weight basis, unless otherwise noted below. General QA/QC issues associated with the analytical data enclosed in this laboratory report will be indicated with a reference to a comment or explanation on the Data Qualifier page. More complex and involved QA/QC issues will be discussed in detail below. Volatiles EPA 8260C Analysis Surrogate percent recovery for Toluene-d8 and 4-Bromofluorobenzene is outside of the control limits for samples KB- 11 and KB-10 due to co-eluting, non-target analytes. Any other QA/QC issues associated with this extraction and analysis will be indicated with a footnote reference and discussed in detail on the Data Qualifier page. 3 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB-11 Laboratory ID: 12-176-01 Gasoline 6800 500 NWTPH-Gx 12-23-19 12-23-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 80 59-122 Client ID: KB-10 Laboratory ID: 12-176-02 Gasoline 4900 500 NWTPH-Gx 12-23-19 12-23-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 85 59-122 Client ID: MW-6 Laboratory ID: 12-176-03 Gasoline 2100 500 NWTPH-Gx 12-23-19 12-23-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 82 59-122 Client ID: KB-1 Laboratory ID: 12-176-04 Gasoline ND 100 NWTPH-Gx 12-23-19 12-23-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 97 59-122 4 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 GASOLINE RANGE ORGANICS NWTPH-Gx QUALITY CONTROL Matrix: Water Units: ug/L (ppb) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1223W1 Gasoline ND 100 NWTPH-Gx 12-23-19 12-23-19 Surrogate: Percent Recovery Control Limits Fluorobenzene 99 59-122 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: 12-174-04 ORIG DUP Gasoline ND ND NA NA NA NA NA 30 Surrogate: Fluorobenzene 97 98 59-122 5 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB-11 Laboratory ID: 12-176-01 Diesel Range Organics ND 4.3 NWTPH-Dx 12-18-19 12-19-19 U1,M1 Lube Oil Range Organics ND 0.23 NWTPH-Dx 12-18-19 12-19-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 Client ID: KB-10 Laboratory ID: 12-176-02 Diesel Range Organics ND 3.4 NWTPH-Dx 12-18-19 12-19-19 U1,M1 Lube Oil Range Organics ND 0.23 NWTPH-Dx 12-18-19 12-19-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 87 50-150 Client ID: MW-6 Laboratory ID: 12-176-03 Diesel Range Organics 1.4 0.22 NWTPH-Dx 12-18-19 12-19-19 M Lube Oil Range Organics 0.24 0.22 NWTPH-Dx 12-18-19 12-19-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 Client ID: KB-1 Laboratory ID: 12-176-04 Diesel Range Organics 0.45 0.23 NWTPH-Dx 12-18-19 12-19-19 Lube Oil Range Organics 1.7 0.23 NWTPH-Dx 12-18-19 12-19-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 96 50-150 6 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 DIESEL AND HEAVY OIL RANGE ORGANICS NWTPH-Dx QUALITY CONTROL Matrix: Water Units: mg/L (ppm) Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1218W1 Diesel Range Organics ND 0.20 NWTPH-Dx 12-18-19 12-18-19 Lube Oil Range Organics ND 0.20 NWTPH-Dx 12-18-19 12-18-19 Surrogate: Percent Recovery Control Limits o-Terphenyl 117 50-150 Source Percent Recovery RPD Analyte Result Spike Level Result Recovery Limits RPD Limit Flags DUPLICATE Laboratory ID: SB1218W1 ORIG DUP Diesel Fuel #2 0.488 0.459 NA NA NA NA 6 NA Lube Oil Range ND ND NA NA NA NA NA NA Surrogate: o-Terphenyl 103 93 50-150 7 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB-11 Laboratory ID: 12-176-01 Dichlorodifluoromethane ND 0.33 EPA 8260D 12-20-19 12-20-19 Chloromethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Vinyl Chloride ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromomethane ND 0.35 EPA 8260D 12-20-19 12-20-19 Chloroethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Acetone ND 5.0 EPA 8260D 12-20-19 12-20-19 Iodomethane ND 1.7 EPA 8260D 12-20-19 12-20-19 Carbon Disulfide 0.37 0.20 EPA 8260D 12-20-19 12-20-19 Methylene Chloride ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Vinyl Acetate ND 1.0 EPA 8260D 12-20-19 12-20-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Butanone ND 5.0 EPA 8260D 12-20-19 12-20-19 Bromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chloroform ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Benzene 1.0 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Trichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 Dibromomethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromodichloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-20-19 12-20-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-20-19 12-20-19 Toluene ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 8 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB-11 Laboratory ID: 12-176-01 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Tetrachloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Hexanone ND 2.0 EPA 8260D 12-20-19 12-20-19 Dibromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Ethylbenzene 0.22 0.20 EPA 8260D 12-20-19 12-20-19 m,p-Xylene 0.92 0.40 EPA 8260D 12-20-19 12-20-19 o-Xylene ND 0.20 EPA 8260D 12-20-19 12-20-19 Styrene ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromoform ND 1.0 EPA 8260D 12-20-19 12-20-19 Isopropylbenzene 32 0.20 EPA 8260D 12-20-19 12-20-19 Bromobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Propylbenzene 44 0.20 EPA 8260D 12-20-19 12-20-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 tert-Butylbenzene 1.6 0.20 EPA 8260D 12-20-19 12-20-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 sec-Butylbenzene 25 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 p-Isopropyltoluene 3.4 0.20 EPA 8260D 12-20-19 12-20-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Butylbenzene 16 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-20-19 12-20-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-20-19 12-20-19 Naphthalene ND 2.0 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 112 75-127 Toluene-d8 145 80-127 Q 4-Bromofluorobenzene 137 78-125 Q 9 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB-10 Laboratory ID: 12-176-02 Dichlorodifluoromethane ND 0.33 EPA 8260D 12-20-19 12-20-19 Chloromethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Vinyl Chloride ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromomethane ND 0.35 EPA 8260D 12-20-19 12-20-19 Chloroethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Acetone ND 5.0 EPA 8260D 12-20-19 12-20-19 Iodomethane ND 1.7 EPA 8260D 12-20-19 12-20-19 Carbon Disulfide 0.27 0.20 EPA 8260D 12-20-19 12-20-19 Methylene Chloride ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Vinyl Acetate ND 1.0 EPA 8260D 12-20-19 12-20-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Butanone ND 5.0 EPA 8260D 12-20-19 12-20-19 Bromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chloroform ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Benzene 0.29 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Trichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 Dibromomethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromodichloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-20-19 12-20-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-20-19 12-20-19 Toluene ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 10 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB-10 Laboratory ID: 12-176-02 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Tetrachloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Hexanone ND 2.0 EPA 8260D 12-20-19 12-20-19 Dibromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Ethylbenzene 0.29 0.20 EPA 8260D 12-20-19 12-20-19 m,p-Xylene 0.61 0.40 EPA 8260D 12-20-19 12-20-19 o-Xylene ND 0.20 EPA 8260D 12-20-19 12-20-19 Styrene ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromoform ND 1.0 EPA 8260D 12-20-19 12-20-19 Isopropylbenzene 26 0.20 EPA 8260D 12-20-19 12-20-19 Bromobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Propylbenzene 45 0.20 EPA 8260D 12-20-19 12-20-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 tert-Butylbenzene 1.1 0.20 EPA 8260D 12-20-19 12-20-19 1,2,4-Trimethylbenzene 0.21 0.20 EPA 8260D 12-20-19 12-20-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 p-Isopropyltoluene 3.6 0.20 EPA 8260D 12-20-19 12-20-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Butylbenzene 13 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-20-19 12-20-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-20-19 12-20-19 Naphthalene ND 2.0 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 99 75-127 Toluene-d8 156 80-127 Q 4-Bromofluorobenzene 135 78-125 Q 11 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-6 Laboratory ID: 12-176-03 Dichlorodifluoromethane ND 0.33 EPA 8260D 12-20-19 12-20-19 Chloromethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Vinyl Chloride ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromomethane ND 0.35 EPA 8260D 12-20-19 12-20-19 Chloroethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Acetone ND 5.0 EPA 8260D 12-20-19 12-20-19 Iodomethane ND 1.7 EPA 8260D 12-20-19 12-20-19 Carbon Disulfide ND 0.20 EPA 8260D 12-20-19 12-20-19 Methylene Chloride ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Vinyl Acetate ND 1.0 EPA 8260D 12-20-19 12-20-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Butanone ND 5.0 EPA 8260D 12-20-19 12-20-19 Bromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chloroform ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Benzene 3.1 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Trichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 Dibromomethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromodichloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-20-19 12-20-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-20-19 12-20-19 Toluene 6.6 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 12 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: MW-6 Laboratory ID: 12-176-03 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Tetrachloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Hexanone ND 2.0 EPA 8260D 12-20-19 12-20-19 Dibromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Ethylbenzene 42 0.20 EPA 8260D 12-20-19 12-20-19 m,p-Xylene 44 0.40 EPA 8260D 12-20-19 12-20-19 o-Xylene 5.4 0.20 EPA 8260D 12-20-19 12-20-19 Styrene ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromoform ND 1.0 EPA 8260D 12-20-19 12-20-19 Isopropylbenzene 11 0.20 EPA 8260D 12-20-19 12-20-19 Bromobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Propylbenzene 14 0.20 EPA 8260D 12-20-19 12-20-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3,5-Trimethylbenzene 7.4 0.20 EPA 8260D 12-20-19 12-20-19 tert-Butylbenzene 0.23 0.20 EPA 8260D 12-20-19 12-20-19 1,2,4-Trimethylbenzene 22 0.20 EPA 8260D 12-20-19 12-20-19 sec-Butylbenzene 2.8 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 p-Isopropyltoluene 4.7 0.20 EPA 8260D 12-20-19 12-20-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Butylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-20-19 12-20-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-20-19 12-20-19 Naphthalene 15 2.0 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 102 75-127 Toluene-d8 116 80-127 4-Bromofluorobenzene 114 78-125 13 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB-1 Laboratory ID: 12-176-04 Dichlorodifluoromethane ND 0.33 EPA 8260D 12-20-19 12-20-19 Chloromethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Vinyl Chloride ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromomethane ND 0.35 EPA 8260D 12-20-19 12-20-19 Chloroethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Acetone ND 5.0 EPA 8260D 12-20-19 12-20-19 Iodomethane ND 1.7 EPA 8260D 12-20-19 12-20-19 Carbon Disulfide 0.26 0.20 EPA 8260D 12-20-19 12-20-19 Methylene Chloride ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Vinyl Acetate ND 1.0 EPA 8260D 12-20-19 12-20-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Butanone ND 5.0 EPA 8260D 12-20-19 12-20-19 Bromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chloroform ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Benzene 0.21 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Trichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 Dibromomethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromodichloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-20-19 12-20-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-20-19 12-20-19 Toluene ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 14 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags Client ID: KB-1 Laboratory ID: 12-176-04 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Tetrachloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Hexanone ND 2.0 EPA 8260D 12-20-19 12-20-19 Dibromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Ethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 m,p-Xylene ND 0.40 EPA 8260D 12-20-19 12-20-19 o-Xylene ND 0.20 EPA 8260D 12-20-19 12-20-19 Styrene ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromoform ND 1.0 EPA 8260D 12-20-19 12-20-19 Isopropylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Propylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Butylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-20-19 12-20-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-20-19 12-20-19 Naphthalene ND 2.0 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 95 75-127 Toluene-d8 96 80-127 4-Bromofluorobenzene 95 78-125 15 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 1 of 2 Matrix: Water Units: ug/L Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1220W1 Dichlorodifluoromethane ND 0.33 EPA 8260D 12-20-19 12-20-19 Chloromethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Vinyl Chloride ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromomethane ND 0.35 EPA 8260D 12-20-19 12-20-19 Chloroethane ND 1.0 EPA 8260D 12-20-19 12-20-19 Trichlorofluoromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Acetone ND 5.0 EPA 8260D 12-20-19 12-20-19 Iodomethane ND 1.7 EPA 8260D 12-20-19 12-20-19 Carbon Disulfide ND 0.20 EPA 8260D 12-20-19 12-20-19 Methylene Chloride ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl t-Butyl Ether ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Vinyl Acetate ND 1.0 EPA 8260D 12-20-19 12-20-19 2,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 (cis) 1,2-Dichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Butanone ND 5.0 EPA 8260D 12-20-19 12-20-19 Bromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chloroform ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Carbon Tetrachloride ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Benzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Trichloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 Dibromomethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromodichloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Chloroethyl Vinyl Ether ND 1.0 EPA 8260D 12-20-19 12-20-19 (cis) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 Methyl Isobutyl Ketone ND 2.0 EPA 8260D 12-20-19 12-20-19 Toluene ND 1.0 EPA 8260D 12-20-19 12-20-19 (trans) 1,3-Dichloropropene ND 0.20 EPA 8260D 12-20-19 12-20-19 16 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL page 2 of 2 Date Date Analyte Result PQL Method Prepared Analyzed Flags METHOD BLANK Laboratory ID: MB1220W1 1,1,2-Trichloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Tetrachloroethene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Hexanone ND 2.0 EPA 8260D 12-20-19 12-20-19 Dibromochloromethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromoethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Chlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,1,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 Ethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 m,p-Xylene ND 0.40 EPA 8260D 12-20-19 12-20-19 o-Xylene ND 0.20 EPA 8260D 12-20-19 12-20-19 Styrene ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromoform ND 1.0 EPA 8260D 12-20-19 12-20-19 Isopropylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Bromobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,1,2,2-Tetrachloroethane ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichloropropane ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Propylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 2-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 4-Chlorotoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3,5-Trimethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 tert-Butylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2,4-Trimethylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 sec-Butylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,3-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 p-Isopropyltoluene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,4-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 n-Butylbenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 1,2-Dibromo-3-chloropropane ND 1.0 EPA 8260D 12-20-19 12-20-19 1,2,4-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Hexachlorobutadiene ND 1.0 EPA 8260D 12-20-19 12-20-19 Naphthalene ND 2.0 EPA 8260D 12-20-19 12-20-19 1,2,3-Trichlorobenzene ND 0.20 EPA 8260D 12-20-19 12-20-19 Surrogate: Percent Recovery Control Limits Dibromofluoromethane 98 75-127 Toluene-d8 95 80-127 4-Bromofluorobenzene 99 78-125 17 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Date of Report: December 27, 2019 Samples Submitted: December 18, 2019 Laboratory Reference: 1912-176 Project: 20181376 VOLATILE ORGANICS EPA 8260D QUALITY CONTROL Matrix: Water Units: ug/L Percent Recovery RPD Analyte Result Spike Level Recovery Limits RPD Limit Flags SPIKE BLANKS Laboratory ID: SB1220W1 SB SBD SB SBD SB SBD 1,1-Dichloroethene 9.74 9.45 10.0 10.0 97 95 63-130 3 17 Benzene 9.96 9.56 10.0 10.0 100 96 76-125 4 19 Trichloroethene 10.3 9.97 10.0 10.0 103 100 76-121 3 18 Toluene 9.99 9.64 10.0 10.0 100 96 80-124 4 18 Chlorobenzene 9.93 9.75 10.0 10.0 99 98 75-120 2 19 Surrogate: Dibromofluoromethane 99 101 75-127 Toluene-d8 98 96 80-127 4-Bromofluorobenzene 104 98 78-125 18 OnSite Environmental, Inc. 14648 NE 95th Street, Redmond, WA 98052 (425) 883-3881 This report pertains to the samples analyzed in accordance with the chain of custody, and is intended only for the use of the individual or company to whom it is addressed. Data Qualifiers and Abbreviations A - Due to a high sample concentration, the amount spiked is insufficient for meaningful MS/MSD recovery data. B - The analyte indicated was also found in the blank sample. C - The duplicate RPD is outside control limits due to high result variability when analyte concentrations are within five times the quantitation limit. E - The value reported exceeds the quantitation range and is an estimate. F - Surrogate recovery data is not available due to the high concentration of coeluting target compounds. H - The analyte indicated is a common laboratory solvent and may have been introduced during sample preparation, and be impacting the sample result. I - Compound recovery is outside of the control limits. J - The value reported was below the practical quantitation limit. The value is an estimate. K - Sample duplicate RPD is outside control limits due to sample inhomogeneity. The sample was re-extracted and re-analyzed with similar results. L - The RPD is outside of the control limits. M - Hydrocarbons in the gasoline range are impacting the diesel range result. M1 - Hydrocarbons in the gasoline range (toluene-naphthalene) are present in the sample. N - Hydrocarbons in the lube oil range are impacting the diesel range result. N1 - Hydrocarbons in diesel range are impacting lube oil range results. O - Hydrocarbons indicative of heavier fuels are present in the sample and are impacting the gasoline result. P - The RPD of the detected concentrations between the two columns is greater than 40. Q - Surrogate recovery is outside of the control limits. S - Surrogate recovery data is not available due to the necessary dilution of the sample. T - The sample chromatogram is not similar to a typical ____________. U - The analyte was analyzed for, but was not detected above the reported sample quantitation limit. U1 - The practical quantitation limit is elevated due to interferences present in the sample. V - Matrix Spike/Matrix Spike Duplicate recoveries are outside control limits due to matrix effects. W - Matrix Spike/Matrix Spike Duplicate RPD are outside control limits due to matrix effects. X - Sample extract treated with a mercury cleanup procedure. X1- Sample extract treated with a sulfuric acid/silica gel cleanup procedure. Y - The calibration verification for this analyte exceeded the 20% drift specified in methods 8260 & 8270, and therefore the reported result should be considered an estimate. The overall performance of the calibration verification standard met the acceptance criteria of the method. Z - ND - Not Detected at PQL PQL - Practical Quantitation Limit RPD - Relative Percent Difference APPENDIX D SLUG TEST RESULTS ___________________________________________________________________________________ 0. 0.16 0.32 0.48 0.64 0.8 0.1 1. 10. Time (sec)Displacement (ft)MW-3 IN-1 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-3 IN-1.aqt Date: 01/08/20 Time: 11:34:25 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-3 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-3) Initial Displacement: 1.81 ft Static Water Column Height: 16.64 ft Total Well Penetration Depth: 23. ft Screen Length: 23. ft Casing Radius: 0.0833 ft Well Radius: 0.3333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.2673 ft/min y0 = 1.921 ft 0. 0.16 0.32 0.48 0.64 0.8 0.01 0.1 1. 10. Time (sec)Displacement (ft)MW-3 IN-2 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-3 IN-3.aqt Date: 01/08/20 Time: 11:36:07 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-3 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-3) Initial Displacement: 1.99 ft Static Water Column Height: 16.64 ft Total Well Penetration Depth: 23. ft Screen Length: 23. ft Casing Radius: 0.0833 ft Well Radius: 0.3333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.2624 ft/min y0 = 2.041 ft 0. 0.2 0.4 0.6 0.8 1. 0.1 1. 10. Time (sec)Displacement (ft)MW-3 IN-3 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-3 IN-4.aqt Date: 01/08/20 Time: 11:37:10 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-3 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-3) Initial Displacement: 1.809 ft Static Water Column Height: 16.64 ft Total Well Penetration Depth: 23. ft Screen Length: 23. ft Casing Radius: 0.0833 ft Well Radius: 0.3333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.2084 ft/min y0 = 2.053 ft 0. 0.16 0.32 0.48 0.64 0.8 0.01 0.1 1. 10. Time (sec)Displacement (ft)MW-3 OUT-1 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-3 OUT-1.aqt Date: 01/08/20 Time: 11:38:18 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-3 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-3) Initial Displacement: 1.415 ft Static Water Column Height: 16.64 ft Total Well Penetration Depth: 23. ft Screen Length: 23. ft Casing Radius: 0.0833 ft Well Radius: 0.3333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.1435 ft/min y0 = 1.416 ft 0. 0.16 0.32 0.48 0.64 0.8 0.001 0.01 0.1 1. 10. Time (sec)Displacement (ft)MW-3 OUT-2 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-3 OUT-2.aqt Date: 01/08/20 Time: 11:39:35 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-3 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-3) Initial Displacement: 2.879 ft Static Water Column Height: 16.64 ft Total Well Penetration Depth: 23. ft Screen Length: 23. ft Casing Radius: 0.0833 ft Well Radius: 0.3333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.1421 ft/min y0 = 2.898 ft 0. 0.16 0.32 0.48 0.64 0.8 0.01 0.1 1. 10. Time (sec)Displacement (ft)MW-3 OUT-3 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-3 OUT-3.aqt Date: 01/08/20 Time: 11:40:23 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-3 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-3) Initial Displacement: 1.618 ft Static Water Column Height: 16.64 ft Total Well Penetration Depth: 23. ft Screen Length: 23. ft Casing Radius: 0.0833 ft Well Radius: 0.3333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.169 ft/min y0 = 1.622 ft 0. 1. 2. 3. 4. 5. 0.1 1. 10. Time (sec)Displacement (ft)MW-4 IN-1 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-4 IN-2.aqt Date: 01/08/20 Time: 11:43:05 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-4 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.1 WELL DATA (MW-4) Initial Displacement: 1.639 ft Static Water Column Height: 8.39 ft Total Well Penetration Depth: 10. ft Screen Length: 10. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.008081 ft/min y0 = 0.3726 ft 0. 2. 4. 6. 8. 10. 0.1 1. 10. Time (sec)Displacement (ft)MW-4 IN-2 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-4 IN-3.aqt Date: 01/08/20 Time: 11:44:27 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-4 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.1 WELL DATA (MW-4) Initial Displacement: 1.567 ft Static Water Column Height: 8.39 ft Total Well Penetration Depth: 10. ft Screen Length: 10. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.008894 ft/min y0 = 0.4237 ft 0. 1.6 3.2 4.8 6.4 8. 0.1 1. 10. Time (sec)Displacement (ft)MW-4 IN-3 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-4 IN-4.aqt Date: 01/08/20 Time: 12:28:59 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-4 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.1 WELL DATA (MW-4) Initial Displacement: 2.013 ft Static Water Column Height: 8.39 ft Total Well Penetration Depth: 10. ft Screen Length: 10. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.009788 ft/min y0 = 0.4072 ft 0. 1.6 3.2 4.8 6.4 8. 0.1 1. 10. Time (sec)Displacement (ft)MW-4 OUT-1 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-4 OUT-1.aqt Date: 01/08/20 Time: 12:29:43 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-4 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.1 WELL DATA (MW-4) Initial Displacement: 1.938 ft Static Water Column Height: 8.39 ft Total Well Penetration Depth: 10. ft Screen Length: 10. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.01012 ft/min y0 = 1.444 ft 0. 1.6 3.2 4.8 6.4 8. 0.1 1. 10. Time (sec)Displacement (ft)MW-4 OUT-2 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-4 OUT-2.aqt Date: 01/08/20 Time: 12:30:32 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-4 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.1 WELL DATA (MW-4) Initial Displacement: 1.153 ft Static Water Column Height: 8.39 ft Total Well Penetration Depth: 10. ft Screen Length: 10. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.006379 ft/min y0 = 1.113 ft 0. 2. 4. 6. 8. 10. 0.1 1. 10. Time (sec)Displacement (ft)MW-4 OUT-3 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-4 OUT-3.aqt Date: 01/08/20 Time: 12:31:14 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-4 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.1 WELL DATA (MW-4) Initial Displacement: 1.709 ft Static Water Column Height: 8.39 ft Total Well Penetration Depth: 10. ft Screen Length: 10. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.009713 ft/min y0 = 1.506 ft 0. 0.16 0.32 0.48 0.64 0.8 0.1 1. Time (sec)Displacement (ft)MW-5 IN-1 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-5 IN-1.aqt Date: 01/08/20 Time: 12:32:02 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-5 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-5) Initial Displacement: 0.797 ft Static Water Column Height: 28.52 ft Total Well Penetration Depth: 30. ft Screen Length: 30. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.2653 ft/min y0 = 0.8451 ft 0. 0.16 0.32 0.48 0.64 0.8 0.1 1. Time (sec)Displacement (ft)MW-5 IN-2 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-5 IN-2.aqt Date: 01/08/20 Time: 12:34:21 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-5 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-5) Initial Displacement: 0.674 ft Static Water Column Height: 28.52 ft Total Well Penetration Depth: 30. ft Screen Length: 30. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.2474 ft/min y0 = 0.7236 ft 0. 0.16 0.32 0.48 0.64 0.8 0.01 0.1 1. Time (sec)Displacement (ft)MW-5 IN-3 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-5 IN-3.aqt Date: 01/08/20 Time: 12:35:13 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-5 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-5) Initial Displacement: 0.706 ft Static Water Column Height: 28.52 ft Total Well Penetration Depth: 30. ft Screen Length: 30. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft Gravel Pack Porosity: 0.22 SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.3057 ft/min y0 = 0.751 ft 0. 0.4 0.8 1.2 1.6 2. 0.01 0.1 1. Time (sec)Displacement (ft)MW-5 OUT-1 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-5 OUT-1.aqt Date: 01/08/20 Time: 12:37:17 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-5 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-5) Initial Displacement: 0.523 ft Static Water Column Height: 28.52 ft Total Well Penetration Depth: 30. ft Screen Length: 30. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.03995 ft/min y0 = 0.5402 ft 0. 0.4 0.8 1.2 1.6 2. 0.01 0.1 1. Time (sec)Displacement (ft)MW-5 OUT-2 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-5 OUT-2.aqt Date: 01/08/20 Time: 12:38:40 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-5 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-5) Initial Displacement: 0.388 ft Static Water Column Height: 28.52 ft Total Well Penetration Depth: 30. ft Screen Length: 30. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.03307 ft/min y0 = 0.4978 ft 0. 0.2 0.4 0.6 0.8 1. 0.01 0.1 1. Time (sec)Displacement (ft)MW-5 OUT-3 Data Set: U:\1-Projects-HYDRO\20181376.003A - Renton DUIP\AQT\MW-5 OUT-4.aqt Date: 01/08/20 Time: 12:39:48 PROJECT INFORMATION Company: Kleinfelder Client: Murraysmith Inc Project: 20181376.003A Location: Renton, WA Test Well: MW-5 Test Date: 10-15-19 AQUIFER DATA Saturated Thickness: 30. ft Anisotropy Ratio (Kz/Kr): 0.25 WELL DATA (MW-5) Initial Displacement: 0.332 ft Static Water Column Height: 28.52 ft Total Well Penetration Depth: 30. ft Screen Length: 30. ft Casing Radius: 0.0833 ft Well Radius: 0.333 ft SOLUTION Aquifer Model: Unconfined Solution Method: Bouwer-Rice K = 0.03028 ft/min y0 = 0.3566 ft APPENDIX E ENVIRONMENTAL FIELD LOGS ___________________________________________________________________________________ 47.481266°, -122.215223° 47.480458°, -122.213224° 47.479771°, -122.216459° APPENDIX F IMPORTANT INFORMATION ABOUT THIS GEOTECHNICAL ENGINEERING REPORT ___________________________________________________________________________________ Geotechnical-Engineering Report Important Information about This Subsurface problems are a principal cause of construction delays, cost overruns, claims, and disputes. While you cannot eliminate all such risks, you can manage them. The following information is provided to help. The Geoprofessional Business Association (GBA) has prepared this advisory to help you – assumedly a client representative – interpret and apply this geotechnical-engineering report as effectively as possible. In that way, you can benefit from a lowered exposure to problems associated with subsurface conditions at project sites and development of them that, for decades, have been a principal cause of construction delays, cost overruns, claims, and disputes. If you have questions or want more information about any of the issues discussed herein, contact your GBA-member geotechnical engineer. Active engagement in GBA exposes geotechnical engineers to a wide array of risk-confrontation techniques that can be of genuine benefit for everyone involved with a construction project. Understand the Geotechnical-Engineering Services Provided for this Report Geotechnical-engineering services typically include the planning, collection, interpretation, and analysis of exploratory data from widely spaced borings and/or test pits. Field data are combined with results from laboratory tests of soil and rock samples obtained from field exploration (if applicable), observations made during site reconnaissance, and historical information to form one or more models of the expected subsurface conditions beneath the site. Local geology and alterations of the site surface and subsurface by previous and proposed construction are also important considerations. Geotechnical engineers apply their engineering training, experience, and judgment to adapt the requirements of the prospective project to the subsurface model(s). Estimates are made of the subsurface conditions that will likely be exposed during construction as well as the expected performance of foundations and other structures being planned and/or affected by construction activities. The culmination of these geotechnical-engineering services is typically a geotechnical-engineering report providing the data obtained, a discussion of the subsurface model(s), the engineering and geologic engineering assessments and analyses made, and the recommendations developed to satisfy the given requirements of the project. These reports may be titled investigations, explorations, studies, assessments, or evaluations. Regardless of the title used, the geotechnical-engineering report is an engineering interpretation of the subsurface conditions within the context of the project and does not represent a close examination, systematic inquiry, or thorough investigation of all site and subsurface conditions. Geotechnical-Engineering Services are Performed for Specific Purposes, Persons, and Projects, and At Specific Times Geotechnical engineers structure their services to meet the specific needs, goals, and risk management preferences of their clients. A geotechnical-engineering study conducted for a given civil engineer will not likely meet the needs of a civil-works constructor or even a different civil engineer. Because each geotechnical-engineering study is unique, each geotechnical-engineering report is unique, prepared solely for the client. Likewise, geotechnical-engineering services are performed for a specific project and purpose. For example, it is unlikely that a geotechnical- engineering study for a refrigerated warehouse will be the same as one prepared for a parking garage; and a few borings drilled during a preliminary study to evaluate site feasibility will not be adequate to develop geotechnical design recommendations for the project. Do not rely on this report if your geotechnical engineer prepared it: • for a different client; • for a different project or purpose; • for a different site (that may or may not include all or a portion of the original site); or • before important events occurred at the site or adjacent to it; e.g., man-made events like construction or environmental remediation, or natural events like floods, droughts, earthquakes, or groundwater fluctuations. Note, too, the reliability of a geotechnical-engineering report can be affected by the passage of time, because of factors like changed subsurface conditions; new or modified codes, standards, or regulations; or new techniques or tools. If you are the least bit uncertain about the continued reliability of this report, contact your geotechnical engineer before applying the recommendations in it. A minor amount of additional testing or analysis after the passage of time – if any is required at all – could prevent major problems. Read this Report in Full Costly problems have occurred because those relying on a geotechnical- engineering report did not read the report in its entirety. Do not rely on an executive summary. Do not read selective elements only. Read and refer to the report in full. You Need to Inform Your Geotechnical Engineer About Change Your geotechnical engineer considered unique, project-specific factors when developing the scope of study behind this report and developing the confirmation-dependent recommendations the report conveys. Typical changes that could erode the reliability of this report include those that affect: • the site’s size or shape; • the elevation, configuration, location, orientation, function or weight of the proposed structure and the desired performance criteria; • the composition of the design team; or • project ownership. As a general rule, always inform your geotechnical engineer of project or site changes – even minor ones – and request an assessment of their impact. The geotechnical engineer who prepared this report cannot accept responsibility or liability for problems that arise because the geotechnical engineer was not informed about developments the engineer otherwise would have considered. Most of the “Findings” Related in This Report Are Professional Opinions Before construction begins, geotechnical engineers explore a site’s subsurface using various sampling and testing procedures. Geotechnical engineers can observe actual subsurface conditions only at those specific locations where sampling and testing is performed. The data derived from that sampling and testing were reviewed by your geotechnical engineer, who then applied professional judgement to form opinions about subsurface conditions throughout the site. Actual sitewide-subsurface conditions may differ – maybe significantly – from those indicated in this report. Confront that risk by retaining your geotechnical engineer to serve on the design team through project completion to obtain informed guidance quickly, whenever needed. This Report’s Recommendations Are Confirmation-Dependent The recommendations included in this report – including any options or alternatives – are confirmation-dependent. In other words, they are not final, because the geotechnical engineer who developed them relied heavily on judgement and opinion to do so. Your geotechnical engineer can finalize the recommendations only after observing actual subsurface conditions exposed during construction. If through observation your geotechnical engineer confirms that the conditions assumed to exist actually do exist, the recommendations can be relied upon, assuming no other changes have occurred. The geotechnical engineer who prepared this report cannot assume responsibility or liability for confirmation-dependent recommendations if you fail to retain that engineer to perform construction observation. This Report Could Be Misinterpreted Other design professionals’ misinterpretation of geotechnical- engineering reports has resulted in costly problems. Confront that risk by having your geotechnical engineer serve as a continuing member of the design team, to: • confer with other design-team members; • help develop specifications; • review pertinent elements of other design professionals’ plans and specifications; and • be available whenever geotechnical-engineering guidance is needed. You should also confront the risk of constructors misinterpreting this report. Do so by retaining your geotechnical engineer to participate in prebid and preconstruction conferences and to perform construction- phase observations. Give Constructors a Complete Report and Guidance Some owners and design professionals mistakenly believe they can shift unanticipated-subsurface-conditions liability to constructors by limiting the information they provide for bid preparation. To help prevent the costly, contentious problems this practice has caused, include the complete geotechnical-engineering report, along with any attachments or appendices, with your contract documents, but be certain to note conspicuously that you’ve included the material for information purposes only. To avoid misunderstanding, you may also want to note that “informational purposes” means constructors have no right to rely on the interpretations, opinions, conclusions, or recommendations in the report. Be certain that constructors know they may learn about specific project requirements, including options selected from the report, only from the design drawings and specifications. Remind constructors that they may perform their own studies if they want to, and be sure to allow enough time to permit them to do so. Only then might you be in a position to give constructors the information available to you, while requiring them to at least share some of the financial responsibilities stemming from unanticipated conditions. Conducting prebid and preconstruction conferences can also be valuable in this respect. Read Responsibility Provisions Closely Some client representatives, design professionals, and constructors do not realize that geotechnical engineering is far less exact than other engineering disciplines. This happens in part because soil and rock on project sites are typically heterogeneous and not manufactured materials with well-defined engineering properties like steel and concrete. That lack of understanding has nurtured unrealistic expectations that have resulted in disappointments, delays, cost overruns, claims, and disputes. To confront that risk, geotechnical engineers commonly include explanatory provisions in their reports. Sometimes labeled “limitations,” many of these provisions indicate where geotechnical engineers’ responsibilities begin and end, to help others recognize their own responsibilities and risks. Read these provisions closely. Ask questions. Your geotechnical engineer should respond fully and frankly. Geoenvironmental Concerns Are Not Covered The personnel, equipment, and techniques used to perform an environmental study – e.g., a “phase-one” or “phase-two” environmental site assessment – differ significantly from those used to perform a geotechnical-engineering study. For that reason, a geotechnical-engineering report does not usually provide environmental findings, conclusions, or recommendations; e.g., about the likelihood of encountering underground storage tanks or regulated contaminants. Unanticipated subsurface environmental problems have led to project failures. If you have not obtained your own environmental information about the project site, ask your geotechnical consultant for a recommendation on how to find environmental risk-management guidance. Obtain Professional Assistance to Deal with Moisture Infiltration and Mold While your geotechnical engineer may have addressed groundwater, water infiltration, or similar issues in this report, the engineer’s services were not designed, conducted, or intended to prevent migration of moisture – including water vapor – from the soil through building slabs and walls and into the building interior, where it can cause mold growth and material-performance deficiencies. Accordingly, proper implementation of the geotechnical engineer’s recommendations will not of itself be sufficient to prevent moisture infiltration. Confront the risk of moisture infiltration by including building-envelope or mold specialists on the design team. Geotechnical engineers are not building-envelope or mold specialists. Copyright 2019 by Geoprofessional Business Association (GBA). Duplication, reproduction, or copying of this document, in whole or in part, by any means whatsoever, is strictly prohibited, except with GBA’s specific written permission. Excerpting, quoting, or otherwise extracting wording from this document is permitted only with the express written permission of GBA, and only for purposes of scholarly research or book review. Only members of GBA may use this document or its wording as a complement to or as an element of a report of any kind. Any other firm, individual, or other entity that so uses this document without being a GBA member could be committing negligent or intentional (fraudulent) misrepresentation. Telephone: 301/565-2733 e-mail: info@geoprofessional.org www.geoprofessional.org APPENDIX G IMPORTANT INFORMATION ABOUT THIS GEOENVIRONMENTAL REPORT ___________________________________________________________________________________ Geoenvironmental Report Geoenvironmental studies are commissioned to gain information about environmental conditions on and beneath the surface of a site. The more comprehensive the study, the more reliable the assessment is likely to be. But remember: Any such assessment is to a greater or lesser extent based on professional opinions about conditions that cannot be seen or tested. Accordingly, no matter how many data are developed, risks created by unanticipated conditions will always remain. Have realistic expectations. Work with your geoenvironmental consultant to manage known and unknown risks. Part of that process should already have been accomplished, through the risk allocation provisions you and your geoenvironmental professional discussed and included in your contract’s general terms and conditions. This document is intended to explain some of the concepts that may be included in your agreement, and to pass along information and suggestions to help you manage your risk. Beware of Change; Keep Your Geoenvironmental Professional Advised The design of a geoenvironmental study considers a variety of factors that are subject to change. Changes can undermine the applicability of a report’s findings, conclusions, and recommendations. Advise your geoenvironmental professional about any changes you become aware of. Geoenvironmental professionals cannot accept responsibility or liability for problems that occur because a report fails to consider conditions that did not exist when the study was designed. Ask your geoenvironmental professional about the types of changes you should be particularly alert to. Some of the most common include: • modification of the proposed development or ownership group, • sale or other property transfer, • replacement of or additions to the financing entity, • amendment of existing regulations or introduction of new ones, or • changes in the use or condition of adjacent property. Should you become aware of any change, do not rely on a geoenvironmental report. Advise your geoenvironmental professional immediately; follow the professional’s advice. Recognize the Impact of Time A geoenvironmental professional’s findings, recommendations, and conclusions cannot remain valid indefinitely. The more time that passes, the more likely it is that important latent changes will occur. Do not rely on a geoenvironmental report if too much time has elapsed since it was completed. Ask your environmental professional to define “too much time.” In the case of Phase I Environmental Site Assessments (ESAs), for example, more than 180 days after submission is generally considered “too much.” Prepare To Deal with Unanticipated Conditions The findings, recommendations, and conclusions of a Phase I ESA report typically are based on a review of historical information, interviews, a site “walkover,” and other forms of noninvasive research. When site subsurface conditions are not sampled in any way, the risk of unanticipated conditions is higher than it would otherwise be. While borings, installation of monitoring wells, and similar invasive test methods can help reduce the risk of unanticipated conditions, do not overvalue the effectiveness of testing. Testing provides information about actual conditions only at the precise locations where samples are taken, and only when they are taken. Your geoenvironmental Important Information about This professional has applied that specific information to develop a general opinion about environmental conditions. Actual conditions in areas not sampled may differ (sometimes sharply) from those predicted in a report. For example, a site may contain an unregistered underground storage tank that shows no surface trace of its existence. Even conditions in areas that were tested can change, sometimes suddenly, due to any number of events, not the least of which include occurrences at adjacent sites. Recognize, too, that even some conditions in tested areas may go undiscovered, because the tests or analytical methods used were designed to detect only those conditions assumed to exist. Manage your risks by retaining your geoenvironmental professional to work with you as the project proceeds. Establish a contingency fund or other means to enable your geoenvironmental professional to respond rapidly, in order to limit the impact of unforeseen conditions. And to help prevent any misunderstanding, identify those empowered to authorize changes and the administrative procedures that should be followed. Do Not Permit Any Other Party To Rely on the Report Geoenvironmental professionals design their studies and prepare their reports to meet the specific needs of the clients who retain them, in light of the risk management methods that the client and geoenvironmental professional agree to, and the statutory, regulatory, or other requirements that apply. The study designed for a developer may differ sharply from one designed for a lender, insurer, public agency...or even another developer. Unless the report specifically states otherwise, it was developed for you and only you. Do not unilaterally permit any other party to rely on it. The report and the study underlying it may not be adequate for another party’s needs, and you could be held liable for shortcomings your geoenvironmental professional was powerless to prevent or anticipate. Inform your geoenvironmental professional when you know or expect that someone else— a third-party—will want to use or rely on the report. Do not permit third-party use or reliance until you first confer with the geoenvironmental professional who prepared the report. Additional testing, analysis, or study may be required and, in any event, appropriate terms and conditions should be agreed to so both you and your geoenvironmental professional are protected from third-party risks. Any party who relies on a geoenvironmental report without the express written permission of the professional who prepared it and the client for whom it was prepared may be solely liable for any problems that arise. Avoid Misinterpretation of the Report Design professionals and other parties may want to rely on the report in developing plans and specifications. They need to be advised, in writing, that their needs may not have been considered when the study’s scope was developed, and, even if their needs were considered, they might misinterpret geoenvironmental findings, conclusions, and recommendations. Commission your geoenvironmental professional to explain pertinent elements of the report to others who are permitted to rely on it, and to review any plans, specifications or other instruments of professional service that incorporate any of the report’s findings, conclusions, or recommendations. Your geoenvironmental professional has the best understanding of the issues involved, including the fundamental assumptions that underpinned the study’s scope. Give Contractors Access to the Report Reduce the risk of delays, claims, and disputes by giving contractors access to the full report, providing that it is accompanied by a letter of transmittal that can protect you by making it unquestionably clear that: 1) the study was not conducted and the report was not prepared for purposes of bid development, and 2) the findings, conclusions, and recommendations included in the report are based on a variety of opinions, inferences, and assumptions and are subject to interpretation. Use the letter to also advise contractors to consult with your geoenvironmental professional to obtain clarifications, interpretations, and guidance (a fee may be required for this service), and that—in any event—they should conduct additional studies to obtain the specific type and extent of information each prefers for preparing a bid or cost estimate. Providing access to the full report, with the appropriate caveats, helps prevent formation of adversarial attitudes and claims of concealed or differing conditions. If a contractor elects to ignore the warnings and advice in the letter of transmittal, it would do so at its own risk. Your geoenvironmental professional should be able to help you prepare an effective letter. Do Not Separate Documentation from the Report Geoenvironmental reports often include supplemental documentation, such as maps and copies of regulatory files, permits, registrations, citations, and correspondence with regulatory agencies. If subsurface explorations were performed, the report may contain final boring logs and copies of laboratory data. If remediation activities occurred on site, the report may include: copies of daily field reports; waste manifests; and information about the disturbance of subsurface materials, the type and thickness of any fill placed on site, and fill placement practices, among other types of documentation. Do not separate supplemental documentation from the report. Do not, and do not permit any other party to redraw or modify any of the supplemental documentation for incorporation into other professionals’ instruments of service. Understand the Role of Standards Unless they are incorporated into statutes or regulations, standard practices and standard guides developed by the American Society for Testing and Materials (ASTM) and other recognized standards-developing organizations (SDOs) are little more than aspirational methods agreed to by a consensus of a committee. The committees that develop standards may not comprise those best-qualified to establish methods and, no matter what, no standard method can possibly consider the infinite client- and project-specific variables that fly in the face of the theoretical “standard conditions” to which standard practices and standard guides apply. In fact, these variables can be so pronounced that geoenvironmental professionals who comply with every directive of an ASTM or other standard procedure could run afoul of local custom and practice, thus violating the standard of care. Accordingly, when geoenvironmental professionals indicate in their reports that they have performed a service “in general compliance” with one standard or another, it means they have applied professional judgement in creating and implementing a scope of service designed for the specific client and project involved, and which follows some of the general precepts laid out in the referenced standard. To the extent that a report indicates “general compliance” with a standard, you may wish to speak with your geoenvironmental professional to learn more about what was and was not done. Do not assume a given standard was followed to the letter. Research indicates that that seldom is the case. Realize That Recommendations May Not Be Final The technical recommendations included in a geoenvironmental report are based on assumptions about actual conditions, and so are preliminary or tentative. Final recommendations can be prepared only by observing actual conditions as they are exposed. For that reason, you should retain the geoenvironmental professional of record to observe construction and/or remediation activities on site, to permit rapid response to unanticipated conditions. The geoenvironmental professional who prepared the report cannot assume responsibility or liability for the report’s recommendations if that professional is not retained to observe relevant site operations. Understand That Geotechnical Issues Have Not Been Addressed Unless geotechnical engineering was specifically included in the scope of professional service, a report is not likely to relate any findings, conclusions, or recommendations about the suitability of subsurface materials for construction purposes, especially when site remediation has been accomplished through the removal, replacement, encapsulation, or chemical treatment of on-site soils. The equipment, techniques, and testing used by geotechnical engineers differ markedly from those used by geoenvironmental professionals; their education, training, and experience are also significantly different. If you plan to build on the subject site, but have not yet had a geotechnical engineering study conducted, your geoenvironmental professional should be able to provide guidance about the next steps you should take. The same firm may provide the services you need. Read Responsibility Provisions Closely Geoenvironmental studies cannot be exact; they are based on professional judgement and opinion. Nonetheless, some clients, contractors, and others assume geoenvironmental reports are or certainly should be unerringly precise. Such assumptions have created unrealistic expectations that have led to wholly unwarranted claims and disputes. To help prevent such problems, geoenvironmental professionals have developed a number of report provisions and contract terms that explain who is responsible for what, and how risks are to be allocated. Some people mistake these for “exculpatory clauses,” that is, provisions whose purpose is to transfer one party’s rightful responsibilities and liabilities to someone else. Read the responsibility provisions included in a report and in the contract you and your geoenvironmental professional agreed to. Responsibility provisions are not “boilerplate.” They are important. Rely on Your Geoenvironmental Professional for Additional Assistance Membership in the Geoprofessional Business Association exposes geoenvironmental professionals to a wide array of risk management techniques that can be of genuine benefit for everyone involved with a geoenvironmental project. Confer with your GBA-member geoenvironmental professional for more information. 8811 Colesville Road/Suite G106, Silver Spring, MD 20910 Telephone: 301/565-2733 Facsimile: 301/589-2017 e-mail: info@geoprofessional.org www.geoprofessional.org Copyright 2015 by the Geoprofessional Business Association (GBA). Duplication, reproduction, copying, or storage of this document, in whole or in part, by any means whatsoever, is strictly prohibited, except with GBA’s specific written permission. Excerpting, quoting, or otherwise extracting wording from this document is permitted only with the express written permission of GBA, and only for purposes of scholarly research or book review. Only GBA-Member Firms may use this document as a complement to or as an element of a geoenvironmental report. Any other firm, individual, or entity that so uses this document without being a GBA-Member Firm could be committing negligent or intentional (fraudulent) misrepresentation.