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HomeMy WebLinkAboutST - 14207 TUKWILA INTERNATIONAL BLVD - 7-ELEVEN - STORAGE TANKSTANKS) UNDERGROUND STORAGE TANKS (UST) I ABOVE GROUND STORAGE TANKS (AST) 14207 TUKWILA INTERNATIONAL BLVD PARCEL NUMBER(S) 1610000295 RELATED PERMIT NUMBER(S) NO PERMIT #, PLANS ONLY Stantec January 24, 2011 Stantec Consulting Corporation 12034 134th Court Northeast Redmond WA 98052 Tel: (425) 298-1000 Fax: (425) 298-1019 Tukwila Fire Department 444 Andover Park East Tukwila, WA 98188-7606 Attention: 7 -Eleven store # 22866 Tukwila Dear Captain Ben Hayman, Please accept this final Underground Storage Tank (UST) System Removal and Fourth Quarter 2010 Groundwater Monitoring and Sampling Report for the UST removal project performed at the 7 -Eleven store #22866 in Tukwila, WA from October 27, 2010 to November 5, 2010. This final report includes the soil analytical results from the soil sampling performed as part of the tank removal per your request in order to close Saybr Contractor, Inc.'s permit for the site. Sincerely, STANTEC CONSULTING CORPORATION Deitrie Hanson Geologic Project Specialist Tel: (425) 298-1000 Fax: (425) 298-1019 Deitrie.Hanson@stantec.com Attachment: Underground Storage Tank System Removal and Fourth Quarter 2010 Groundwater Monitoring and Sampling Report, 7 -Eleven Store No. 22866, 14207 Pacific Highway South, Tukwila, WA Underground Storage Tank System Removal and Fourth Quarter 2010 Groundwater Monitoring and Sampling Report 7 -Eleven Store No. 22866 14207 Pacific Highway South Tukwila, Washington Stantec Project No. 212302520 January 21, 2011 Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT Table of Contents January 21, 2011 Table of Contents 1.0 INTRODUCTION 1-1 1.1 PURPOSE AND SCOPE OF WORK 1-1 1.2 SITE BACKGROUND 1-2 1.3 REGULATORY STATUS 1-3 2.0 FACILITY DESCRIPTION 2-1 2.1 SITE LOCATION 2-1 2.2 SITE DESCRIPTION 2-1 2.3 REGIONAL GEOLOGY 2-1 2.4 REGIONAL HYDROGEOLOGY 2-1 3.0 UST REMOVAL ACTIVITIES 3-1 3.1 FIELD SCREENING..., 3-2 3.2 SOIL SAMPLING ACTIVITIES 3-2 3.3 GROUNDWATER SAMPLING ACTIVITIES 3-3 3.4 SUBSURFACE CONDITIONS 3-3 3.4.1 Soil 3-3 3.4.2 Groundwater 3-3 4.0 ANALYTICAL PROGRAM AND RESULTS 4-1 4.1 SOIL AND GROUNDWATER ANALYTICAL PROGRAM AND RESULTS 4-1 4.1.1 Soil Analytical Results 4-1 4.1.2 Soil Disposal 4-1 4.1.3 Groundwater Analytical Results 4-1 5.0 SUMMARY AND CONCLUSIONS 5-1 6.0 REFERENCES 6-1 7.0 STANDARD LIMITATIONS 7-1 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT Table of Contents January 21, 2011 List of Tables Table 1 Cumulative Soil Analytical Results Table 2 Groundwater Monitoring and Analytical Results List of Figures Figure 1 Site Location Map Figure 2 Site Plan With Historical Soil Sample Locations Figure 3 Soil Sampling Analytical Results, October 27 — November 3, 2010 Figure 4 Groundwater Elevation Map, October 29, 2010 Figure 5 Groundwater Analytical Results, October 29, 2010 List of Appendices Appendix A Department of Ecology UST Notices and Checklists Appendix B Waste Manifests, UST Disposal Documentation and Soil Disposal Receipts Appendix C Monitoring Well Purging and Sampling Procedures Appendix D Monitoring and Sampling Field Data Sheets Appendix E Laboratory Reports and Chain -of -Custody Documentation ii 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT Introduction January 21, 2011 1.0 Introduction Stantec Consulting Corporation (Stantec) was retained by 7 -Eleven, Inc. (7 -Eleven) to provide supervision and documentation of the removal of the underground storage tank (UST) system at 7 -Eleven Store No. 22866 (the Site). The Site is located at 14207 Pacific Highway South, Tukwila, Washington (Figures 1 and 2). The work was conducted on October 27 through November 5, 2010 in accordance with the Washington Department of Ecology (Ecology) document: "Guidance for Site Checks and Site Assessments for Underground Storage Tanks" (Ecology, February 1991, revised October 1992). Site assessment activities were performed by a certified Washington State Site Assessor (#8012337-U7) as required by Washington Administrative Code (WAC) 173-360-610. Quarterly groundwater monitoring and sampling was also performed as part of this assessment. 1.1 Purpose and Scope of Work Stantec supervised and observed the removal of three single-wall steel USTs, associated product piping, dispenser islands, and canopy at the Site. Stantec collected UST closure soil samples to assess subsurface conditions adjacent to the former USTs, and beneath the former dispenser islands and product lines. Stantec also collected groundwater samples from existing groundwater monitoring wells as part of the fourth quarter 2010 groundwater monitoring and sampling event. Stantec's scope of work consisted of the following tasks: • Preparation of a site-specific Health and Safety Plan (HASP); • Notification to Ecology 30 days prior to UST removal; • Notification to 7 -Eleven 10 business days in advance of construction activities; • Supervision and documentation of the decommissioning activities of the dispenser islands, product piping, USTs, and canopy; • Inspection of the condition of the USTs and product piping upon removal; • Dewatering of the excavation as needed during periods of heavy rain; • Collection of soil samples from the UST excavation and beneath the product lines and dispensers for the purposes of logging subsurface conditions, field screening of soil samples for organic vapors using a photoionization detector (PID), and submitting selected soil samples for laboratory analysis of total petroleum hydrocarbons characterized as gasoline (TPH-G), benzene, toluene, ethyl benzene and total xylenes (BTEX); 1-1 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT Introduction January 21, 2011 • Collection of soil samples from the soil stockpiles for purposes of field screening and laboratory analysis; • Monitoring and sampling of selected groundwater wells as part of the fourth quarter 2010 sampling event; and • Preparation of this report documenting UST removal activities, groundwater sampling, and site restoration. 1.2 Site Background The Site is an active 7 -Eleven convenience store with former retail sales of gasoline. Installation of three 12,000 gallon gasoline USTs was completed in 1981. The Site has remained in its current configuration since that time. In October 1995, soil samples were collected during a Stage II upgrade of the product piping and dispensers. Analytical results indicated that TPH-G was present in subsurface soils at the north end of the dispenser island. Approximately 29 tons of petroleum impacted soil was excavated during the upgrade and removed from the Site for disposal. On November 15, 1995, a leaking UST report was filed with the Ecology. In March 1996, monitoring wells MW -1A through MW -3A (deep wells) and MW -1B through MW -3B (shallow wells) were installed to assess the extent and concentration of petroleum hydrocarbons in the subsurface. BTEX and TPH-G were not detected above Ecology's Model Toxics Control Act (MTCA) Method A Cleanup Levels (CULs) in the soil samples collected during the well installations. Benzene concentrations were detected above the MTCA Method A CUL in groundwater samples collected from monitoring wells MW -2B, MW -3A, and MW -3B. TPH-G concentrations were detected above the MTCA Method A CUL in the groundwater samples collected from monitoring wells MW -3A and MW -3B. Total lead was not detected in any of the groundwater samples. In October 1996, monitoring wells MW-4A/B and MW-5A/B were installed. In August 1997, Fluor Daniel GTI, Inc. completed a dual-phase extraction/soil vapor extraction (DPE/SVE) feasibility test. In November 1997, a DPE/SVE system was installed at the Site. The system included eight DPE/SVE wells (DPE-1 through DPE-8) and associated piping. The system was started on February 12, 1998. The DPE portion of the system was shut down in the winter of 1998 due to equipment damage from subfreezing temperatures. The DPE system remained offline through 1999. In November 1999, IT Corporation personnel advanced 12 exploratory soil borings at the Site. Benzene was reported above the MTCA Method A CUL in three soil samples from borings located south of the USTs and dispenser islands. TPH-G concentrations were also reported above the MTCA Method A CUL in two of these soil samples. On January 27, 2000, the DPE portion of the remediation system was restarted to address the increasing concentrations of petroleum hydrocarbons in MW -5B. 1-2 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT Introduction January 21, 2011 In August 2000, IT Corporation advanced one additional boring south of the USTs. Benzene and TPH-G were reported above the MTCA Method A CULs in the sample collected from this boring. On April 17, 2001, the DPE/SVE system was shut down for repairs and restarted on August 29, 2001. On April 17, 2002, the system compound was damaged by vehicular traffic. Subsequently, due to the decreasing effectiveness of the technology at the Site, the system was shut down permanently. The system equipment and associated concrete pad were removed from the Site in February 2007. Quarterly groundwater monitoring and sampling has been performed since 2002 through the present. On December 14, 2004, SECOR International Incorporated (SECOR, now Stantec) supervised the advancement of eight soil borings (BH -1 through BH -8) to 12 feet below ground surface (bgs) using a truck -mounted hollow stem auger coring system. Fourteen soil samples and three groundwater samples collected from BH -1 through BH -8 were submitted for analysis. Petroleum hydrocarbon constituents were detected above the MTCA Method A CULs in the soil samples collected from BH -2, BH -3, BH -5, and BH -7 and in the groundwater samples collected from borings BH -1 and BH -2. Based on the analytical results, petroleum impacted soil and groundwater was identified east and southeast of the convenience store building. 1.3 Regulatory Status Stantec reviewed Ecology's electronic databases regarding the regulatory status of the Site. The Site is listed as Facility Site ID number 23544274 in Ecology's UST database under the program identifier 8603. The Site is listed in the Leaking Underground Storage Tank (LUST) database under Release ID 324111. 1-3 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT Facility Description January 21, 2011 2.0 Facility Description 2.1 Site Location The Site is located at the southwest corner of the intersection of South 142nd Street and Pacific Highway South, Tukwila, Washington (Figures 1 and 2). Access to the property is provided by South 142nd Street to the north and Pacific Highway South to the east. The Site is located in a mixed residential and commercial area. 2.2 Site Description The Site is currently occupied by an operating 7 -Eleven convenience store located in the western portion of the property (Figure 2). Three 12,000 gallon, single-wall steel USTs were formerly located in the northern portion of the property. One product dispenser island covered by a canopy was formerly located east of the former USTs. After the UST system removal was completed, the former locations of USTs, dispenser islands, and canopy were resurfaced with asphalt and are currently used as additional parking for the 7 -Eleven convenience store. 2.3 Regional Geology The Site is located on the Vashon Till unit, a member of the Pleistocene Vashon Drift sediments group deposited during the latest episode of glaciations in the Puget Sound region. The Vashon Till varies in thickness from a few feet to 150 feet thick. It is comprised of gravelly, sandy silt to silty sand with varied quantities of clay, cobbles, and boulders. Local lenses of sand and gravel, containing pockets of perched groundwater, are common. Permeability of the sediments is extremely low, except in the sand and gravel lenses. 2.4 Regional Hydrogeology The closest body of water to the Site is the Duwamish River, located approximately 1.5 miles northeast of the Site. The Duwamish River flows generally to the northwest in the vicinity of the Site, releasing into Puget Sound approximately 5 miles west of the Site. Depth to groundwater in onsite monitoring wells ranges from approximately 6 to 11 feet bgs. 2-1 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT UST Removal Activities January 21, 2011 3.0 UST Removal Activities Stantec contracted Saybr Contractors, Inc. (Saybr) of Tacoma, Washington to remove the three USTs and ancillary equipment at the Site. Prior to commencement of closure activities, a 30 day notice of UST closure was submitted to the Washington Department of Ecology (Appendix A). Prior to tank closure activities, the USTs were emptied by 7 -Eleven, One Call was contacted by Stantec to determine the presence of underground utilities, and electrical service to the dispenser islands and USTs was isolated and removed by a certified electrician. A site-specific HASP was prepared for the Site as part of the project. The HASP identified potential physical and chemical hazards associated with the proposed field activities and established personal protection standards and mandatory safety practices. The HASP also included information on suspected chemical compounds to be encountered, a list of monitoring equipment, the required protective clothing and equipment, a map and directions to the nearest hospital and a list of emergency telephone numbers. The HASP was available on Site during the field activities. Stantec personnel and subcontractors working on the Site were required to review, sign and comply with the provisions set forth in the HASP. Due to heavy rain on November 1, 2010, Stantec supervised the removal of approximately 2,900 gallons of run-off rainwater that had collected in the open UST excavation. The water was pumped to a portable holding tank on November 1 and 2, 2010. A water sample was collected from the tank on November 2, 2010, and submitted for laboratory analysis for waste characterization purposes. On November 10, 2010, the water was transported by Saybr to PRS Group, Inc. (PRS) of Tacoma, Washington for disposal. Copies of the water waste manifests are provided in Appendix B. On November 2, 2010, Stantec observed the removal of three 12,000 gallon, single-wall steel USTs at the Site. Prior to removal of the USTs, the remaining product was pumped from the USTs and the tanks were triple -rinsed. A total of approximately 2,800 gallons of product and rinse water were removed from the three tanks by Sound Marine and Industrial Services of Seattle, Washington and transported to PRS. Copies of the product and rinse water waste manifests are provided in Appendix B. The USTs were rendered inert by venting with carbon dioxide. A Washington State certified marine chemist confirmed the organic vapor levels in the tanks with a PID prior to removal. Upon exposure and visual inspection, the USTs and product delivery piping appeared to be in overall good condition, and no apparent failures were observed. One UST was transported by Saybr to Seattle Iron & Metals of Seattle, Washington, and the other two USTs were transported to Schnitzer Steel of Tacoma, Washington. Copies of UST disposal manifests are provided in Appendix B. 3-1 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT UST Removal Activities January 21, 2011 3.1 Field Screening Field screening consisted of visual observations of potential hydrocarbon contamination and headspace analysis for volatile organic vapors using a MiniRae, Inc., Organic Vapor Meter PID. A sample of the soil matrix was placed in a re -sealable plastic bag, and allowed to equilibrate for approximately 10 minutes. The probe of the PID was used to pierce the plastic, and was extended into the headspace above the soil surface. The highest vapor reading obtained over 60 seconds was then recorded. Prior to use, the PID was calibrated to known concentrations of isobutylene, in accordance with the manufacturer's specifications. Headspace vapor measurements for all soil sample locations collected at the Site are included in Table 1. Elevated PID readings, hydrocarbon odors, and staining were encountered in the soil underneath the former dispenser island (Figure 3). In addition, elevated PID readings were observed in all the samples collected during this investigation. Soil with elevated PID readings and/or visible staining was excavated and stockpiled separately on plastic and samples were collected before final disposal. Although field screening indicated that petroleum -impacted soil was present throughout the UST excavation, over -excavation was limited to the area surrounding and beneath the dispenser islands due to close proximity to underground utilities and the building foundation (Figure 3). 3.2 Soil Sampling Activities During excavation activities, Stantec personnel collected soil samples from the excavation sidewalls, beneath the product lines, and beneath the dispenser islands in accordance with published EPA and Ecology guidelines. No soil samples were collected from underneath the USTs or from the base of excavation because of the presence of groundwater at approximately 12 feet bgs. Sampling was conducted at locations associated with visual evidence of soil staining, noticeable odors, and elevated headspace vapor concentration measurements. Samples for field screening purposes were collected from the sidewalls of the excavation on an approximate 10 foot vertical by 10 foot horizontal grid when possible. Soil samples from the UST excavation were collected from relatively undisturbed soil in the excavator bucket, and prepared using EPA Method 5035A (described as follows).The samples were placed directly into pre -weighed 40 -milliliter vials. Additional soil samples were collected by hand and placed directly in clean 4 -ounce glass jars. A clean disposable glove was used for each sample. Care was taken to obtain representative soil samples and to place the soils directly and quickly into the sample container to minimize loss of volatile constituents. The threads of the sample jars were wiped clean of soil particles that would interfere with an airtight seal, and a Teflon -lined screw closure lid was immediately placed on the jars. The sample jars were labeled (i.e., sample identification, depth, type of analysis, date, and time of sampling) and placed in a cooler on ice for subsequent transport Friedman & Bruya, Inc.(F&B), an Ecology -accredited fixed -base analytical laboratory located in Seattle, Washington. United States Environmental Protection Agency (EPA) recommended protocols for sample 3-2 22866 UST Removal Report Dec 2010 Final.docx StanfieC UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT UST Removal Activities January 21, 2011 management, including chain -of -custody procedures and documentation, were observed during all sampling activities. 3.3 Groundwater Sampling Activities The fourth quarter 2010 groundwater monitoring and sampling event was conducted on October 29, 2010. Groundwater samples were collected from wells MW -1B, MW -2B, MW -3A, MW -3B, MW -4B, and DPE-3. Based on the depth -to -groundwater measurements for this monitoring event, groundwater is relatively level across the Site. Groundwater samples were collected in accordance with the procedures included in Appendix C. Monitoring and sampling field data sheets are included in Appendix D. 3.4 Subsurface Conditions 3.4.1 Soil Soils observed underlying the Site were classified as dark brown and greenish gray, fine to medium grained sands with some silt and gravel to a depth of approximately 12 feet bgs. 3.4.2 Groundwater Groundwater was encountered at approximately 12 feet bgs during the UST closure activities conducted in November 2010. Less than one foot of groundwater was present in the excavation after the USTs were removed. The depth to groundwater measured on October 29, 2010 ranged between 6.98 feet below the top -of -casing (TOC) elevation in well MW -2B to 9.26 feet below the TOC in MW -1A. Based on the measured elevations, shallow groundwater beneath the Site appears is relatively level with no discernable flow direction or gradient. A groundwater elevation map is included as Figure 4 and historical groundwater elevations are included on Table 2. 3-3 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT Analytical Program and Results January 21, 2011 4.0 Analytical Program and Results 4.1 Soil and Groundwater Analytical Program and Results The soil samples collected from the soil stockpiles, UST excavation sidewalls, beneath the former product lines and dispenser islands were delivered under chain -of -custody to F&B. Thirteen soil sample locations were selected for laboratory analysis based on PID readings and location. Samples were analyzed for BTEX and TPH-G. 4.1.1 Soil Analytical Results Analytical results for the submitted soil samples from the UST closure activities are summarized in Table 1 and shown on Figure 3. Complete laboratory results and chain -of -custody documentation are included in Appendix E. Analytical results for soil samples collected during UST closure activities include: • Benzene was reported exceeding the MTCA Method A CUL in soil samples SS1@12', SS -3@12', SS -4@12', PL -1@2', PL -2@2', and SP -1, SP -2, SP -4 and SP -5; • The laboratory practical quantitation limit (PQL) for benzene was greater than the MTCA Method A CUL in soil samples SS -2@12' and SP -3; • Concentrations of ethyl benzene and total xylenes exceeded their respective MTCA Method A CULs in SS -2@12' and SP -3; and, • TPH-G exceeded the MTCA Method A CUL in SS -2@12', SS -4@12', SP -3, and PL -1@2'. 4.1.2 Soil Disposal Soils with petroleum odors and elevated PID readings were sampled and then stockpiled for subsequent removal and disposal. Approximately 329 tons of petroleum impacted soil was transported by Saybr to the Allied Waste facility located in Seattle, Washington. Copies of the soil disposal receipts are provided in Appendix B. 4.1.3 Groundwater Analytical Results The October 29, 2010 groundwater analytical results indicate that concentrations of benzene exceeded the MTCA Method A CUL in groundwater samples collected from wells MW -1B and MW -2B. Dissolved concentrations of TPH-G were reported exceeding the MTCA Method A CUL in the groundwater sample collected from monitoring well MW -2B. All other reported petroleum hydrocarbon concentrations were either not detected exceeding laboratory practical quantitation limits or were reported below their respective MTCA Method A CULs. Groundwater analytical results are summarized in Table 2 and are also shown on Figure 3. 4-1 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT Summary and Conclusions January 21, 2011 5.0 Summary and Conclusions Three 12,000 gallon, single-wall steel USTs, one dispenser island, associated product lines, and the canopy were removed from the Site on October 27 through November 5, 2010. The Underground Storage Tank Closure and Site Assessment Notice and the Underground Storage Tank Check/Site Assessment Checklist are provided in Appendix A. Based on field observations and analytical data, Stantec concludes the following: • Upon exposure and visual inspection, all three USTs appeared to be in overall good condition, and no apparent failures were observed. • Elevated PID readings were observed in the UST basin, under the product lines, and under the dispenser island. • Over -excavation of petroleum -impacted soil was limited to the area surrounding and beneath the dispenser islands. Additional over -excavation was limited due to the close proximity to underground utilities and the building foundation. • Analytical laboratory results of the soil samples collected following UST removal activities confirmed that petroleum -impacted soil exceeding MTCA Method A CULs are present at the Site in the area of the former UST system. • Analytical results of groundwater samples collected during the fourth quarter 2010 monitoring and sampling event (October 29, 2010) confirmed that dissolved concentrations of TPH-G and benzene exceeding their respective MTCA Method A CULs are present beneath the northern portion of the Site. • A total of approximately 329 tons of petroleum impacted soil was removed from the excavation and disposed of in an appropriately permitted landfill. Based on the results of this investigation, Stantec recommends additional subsurface investigation to further assess the extent of petroleum impacted soil, and continued groundwater monitoring of select wells to further evaluate dissolved contaminant concentration trends and seasonal water level fluctuations beneath the Site. 5-1 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT References January 21, 2011 6.0 References Groundwater Technology, Inc. 1996. Site Assessment Report, Southland Facility #22866, 14207 Pacific Highway South, Tukwila, WA. Prepared for 7 -Eleven, Inc. May 30. Fluor Daniel GTI. 1997. Site Assessment Report, The Southland Corporation, Southland Facility #22866, 14207 Pacific Highway South, Tukwila, WA. Prepared for 7 -Eleven, Inc. February 13. Fluor Daniel GTI. 1998. Remediation System Installation and Fourth Quarter 1997, Monitoring and Sampling Report, Southland Store No. 22866, 14207 Pacific Highway South, Seattle, WA. March 20. Fluor Daniel GTI. 1998. Remediation Progress Report, July and September 1998, Southland Store No. 22866, 14207 Pacific Highway South, Seattle, WA. December 11. SECOR International Inc. 2002. Fourth Quarter 2001 and First Quarter 2002 Remediation Progress Report, 7 -Eleven Store #22866, 14207 Pacific Highway South, Seattle, Washington. October 2. SECOR International, Inc. 2005. Geoprobe Assessment Report for 7 -Eleven, Inc., 14207 Pacific Highway South, Seattle, Washington. May 25. Underground Storage Tank (UST) and Leaking Underground Storage Tank (LUST) Lists, available from: https://fortress.wa.qov/ecv/tcpwebreportinq/reports.aspx [Accessed 14 December 2010]. Washington State Department of Ecology (Ecology). February 1991 (Revised October 1992). Guidance for Site Checks and Site Assessments for Underground Storage Tanks. Olympia: DOE Underground Storage Tank Section. 6-1 22866 UST Removal Report Dec 2010 Final.docx Stantec UNDERGROUND STORAGE TANK SYSTEM REMOVAL AND FOURTH QUARTER 2010 GROUNDWATER MONITORING AND SAMPLING REPORT §tandard ijmifations January 21, 2011 7.0 Standard Limitations This report was prepared in accordance with the scope of work outlined in Stantec's contract and with generally accepted professional engineering and environmental consulting. practices existing at the time this report was prepared and applicable to the location of the Site. It was prepared for the exclusive use of 7 -Eleven, Inc., for the express purpose stated above. Any re -use of this report for a different purpose or by others not identified above shall be at the user's sole risk without liability to Stantec. To the extent that this report is based on information provided to Stantec by third parties, Stantec may have made efforts to verify this third party information, but Stantec cannot guarantee the completeness or accuracy of this information. The opinions expressed and data collected are based on the conditions of the Site existing at the time of the field investigation. No other warranties, expressed or implied are made by Stantec. Prepared by: Reviewed by: Deitrie Hansorr Staff Geologist 22866 UST Removal Report Dec 2010 Final.docx s Arrta tda S. Nang _ , R.G Geologic Associate 7-1 TABLES LJ r'. r LJ r' LJ LJ L L.) 6_J • 1 r TABLE 1 Cumulative Soil Analytical Results 7 -Eleven Store No. 22866 14207 Pacific Highway South, Tukwila, Washington Concentrations are in milligrams per kilogram (mg/kg) Sample Description Sample ID Date Depth (feet gs) PID reading Benzene Toluene Ethyl- benzene Total Xylenes TPH-G Lead Stage II Upgrade Samples 01-2' 10/30/95 2 -- 0.57 22 12 120 1,300 26 D2-2' 10/30/95 2 -- <0.05 0.45 0.51 1.8 14 26 LS1-2' 10/30/95 2 -- <0.05 <0.05 <0.05 0.11 12 18 TP1-2' 10/30/95 2 -- <0.05 0.51 <0.05 <0.10 7.9 15 Groundwater Monitoring Wells MW -1A-7-8.5 3/26/96 7-8.5 -- <0.05 <0.05 <0.05 <0.10 <1.0 <10 MW -1A-32.5-34 3/26/96 32.5-34 -- <0.05 <0.05 <0.05 <0.10 <1.0 <10 MW -2A-2.5-4 3/26/96 2.5-4 -- <0.05 <0.05 <0.05 <0.10 <1.0 <10 MW -2A-32.5-34 3/26/96 32.5-34 -- <0.05 <0.05 <0.05 <0.10 <1.0 <10 MW -3A-2.5-4 3/26/96 2.5-4 -- <0.05 <0.05 <0.05 <0.10 <1.0 <10 MW -3A-12.5-14 3/26/96 12.5-14 -- <0.05 <0.05 <0.05 <0.10 <1.0 <10 MW -3A-32.5-34 3/26/96 32.5-34 -- 0.45 <0.05 0.096 0.28 7.4 <10 MW4S-A 10/30/96 5-6.5 -- <0.05 <0.05 <0.05 <0.10 <5.0 <10 MW4D-B 10/30/96 10-11.5 -- <0.05 <0.05 <0.05 <0.10 <5.0 <10 MW4D-C 10/30/96 15-16.5 -- <0.05 <0.05 <0.05 <0.10 <5.0 <10 MW5S-A 10/30/96 5-6.5 -- 5.41 3.73 34.1 98.1 2,820 32.5 MW5S-B 10/30/96 10-11.5 -- <0.10 <0.10 <0.10 <0.20 <10 <10 MW5D-A 10/30/96 7.5-9 -- <5.0 5.69 33.0 118 3,900 18.0 MW5D-B 10/30/96 12.5-14 -- 17.3 66.6 78.2 539 7,910 14.3 MW5D-C 10/30/96 15-16.5 -- 0.265 0.265 0.588 3.79 56.0 11.8 Soil Borings B1A 11/29/99 5 - <0.05 <0.05 <0.05 <0.05 <10 -- B1B 11/29/99 10 -- <0.05 0.06 <0.05 <0.05 <10 -- B2A 11/29/99 5 -- <0.05 0.06 <0.05 <0.05 <10 -- B2B 11/29/99 10 - <0.05 <0.05 0.19 0.19 <10 -- B3A 11/29/99 5 -- 20 48 100 580 4,300 -- B3B 11/29/99 10 -- 4 3.2 11 56 400 -- B4A 11/29/99 5 -- <0.05 <0.05 <0.05 0.11 <10 -- B4B 11/29/99 10 -- 1 1 1.7 6.6 60 -- B5A 11/29/99 5 -- <0.05 <0.05 <0.050 0.09 <10 -- B5B 11/29/99 10 -- <0.05 <0.05 <0.05 <0.05 <10 -- B6A 11/29/99 5 -- <0.05 <0.05 <0.05 <0.05 <10 -- B6B 11/29/99 10 -- <0.05 <0.05 <0.05 <0.05 <10 -- BH -1-8 12/14/04 8 -- <0.020 <0.041 <0.041 <0.082 <4.1 -- BH-2-6 12/14/04 6 -- 0.2 <0.95 12 36.3 1,900 -- BH-2-8 12/14/04 8 -- 1.8 1.7 73 236a 5,400 -- BH-3-6 12/14/04 6 -- <0.020 <0.059 0.23 0.27 95 -- BH-3-8.5 12/14/04 8.5 -- <0.020 <0.048 <0.048 <0.096 14 -- BH-4-4.5 12/14/04 4.5 -- <0.020 <0.048 <0.048 <0.096 <4.8 -- BH-4-6 12/14/04 6 -- <0.020 <0.045 <0.045 <0.090 <4.5 -- BH-4-8 12/14/04 8 -- <0.020 <0.057 <0.057 <0.114 <5.7 -- BH-5-4.5 12/14/04 4.5 - 0.10 <0.085 1.5 7.0 100 -- BH-5-7 12/14/04 7 -- 1.7 4.9 49 263 3,300 -- BH-6-6 12/14/04 6 -- <0.020 <0.049 <0.049 <0.098 <4.9 -- BH-6-8 12/14/04 8 -- <0.020 <0.047 <0.047 <0.094 <4.7 -- BH-7-7 12/14/04 7 -- 0.84 26 5.3 217a 3,100 -- BH-8-6 12/14/04 6 -- <0.020 <0.058 <0.058 <0.116 <5.8 -- Sidewall Samples SS-1@12' 11/2/10 12 276 0.095 <0.05 0.15 0.422 4.1 -- SS -2@12' 11/3/10 12 2,610 <0.3 <0.5 32 87.8 4,400 -- SS -3@12' 11/3/10 12 83.2 0.25 0.078 <0.05 <0.15 6.2 -- SS-4@12' 11/3/10 12 931 0.23 <0.05 0.84 1.99 260 -- Soil Stockpile Samples SP-1 10/27/10 -- 451 0.19 <0.05 <0.05 <0.15 3.3 -- SP -2 11/2/10 -- 875 1.2 0.94 0.81 6.3 16 -- SP -3c 11/2/10 -- 2,226 <3 <5 40 222 5,000 -- SP -4 11/2/10 -- 475 0.86 0.16 0.083 0.23 12 -- SP-5 11/2/10 -- 275 2.7 0.29 0.23 0.54 17 -- Product Line Samples PL -1@2' 11/3/10 2 643 0.37 2.5 0.98 5.6 66 -- PL -202' 11/3/10 2 248 0.41 <0.05 0.11 0.17 17 -- Dispenser Island Samples DP -1@2' 11/3/10 2 25.2 <0.03 <0.05 <0.05 0.157 8.3 -- DP -202' A Soil CULs for Unrestricted 11/3/10 Land 2 Uses 90.6 <0.03 0.03 <0.05 7 <0.05 6 <0.15 9.4 - MTCA Method 9 30/100 b 250 Explanation of Abbreviations: bgs = below ground surface TPH-G = total petroleum hydrocarbons in the gasoline range < = reported result is below laboratory practical quantitation limit MTCA = Model Toxics Control Act CULs = Cleanup levels = The value reported for m,p-xylene exceeds the quantitation range and is an estimate. = Gasoline mixtures without benzene and where the total of ethylbenzene, toluene, and xylene are less than 1% of the gasoline mixture have a cleanup level of 100 mg/kg; all other mixtures are 30 mg/kg. = Diluted sample. The original sample results were estimated concentrations calculated for an analyte response above the valid instrument calibration range. Bold results exceed MTCA Method A Soil Cleanup Level TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID (TOC) TOC Sample Date Benzene Toluene Ethyl- benzene Total Xylenes y TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -1A 299.50 299.02 04/10/96 <0.5 <0.5 <0.5 <0.1 <50 <2.0 -- -- -- 05/09/96 -- -- -- -- -- -- -- 7.70 291.80 11/07/96 0.869 2.05 <0.5 <0.1 <50 6.31 -- 9.91 289.59 03/18/97 -- -- -- -- -- -- -- 6.99 292.51 06/10/97 -- -- -- -- -- -- -- 7.90 291.60 09/11/97 -- -- -- -- -- -- -- 9.99 289.51 12/04/97 -- -- -- -- -- -- -- 8.80 290.70 03/17/98 -- -- -- -- -- -- -- 7.79 291.71 06/03/98 -- -- -- -- -- -- -- 9.20 290.30 09/22/98 -- -- -- -- -- -- -- 11.06 288.44 12/08/98 -- -- -- -- -- -- -- 8.22 291.28 03/16/99 -- -- -- -- -- -- -- 7.32 292.18 06/08/99 -- -- -- -- -- -- -- 8.45 291.05 09/30/99 -- -- -- -- -- -- -- 10.21 289.29 12/13/99 -- -- -- -- -- -- -- 8.80 290.70 03/01/00 -- -- -- -- -- -- -- 8.10 291.40 06/06/00 -- -- -- -- -- -- -- 8.89 290.61 08/17/00 -- -- -- -- -- -- -- 10.03 289.47 10/12/00 -- -- -- -- -- -- -- 10.76 288.74 01/17/01 -- -- -- -- -- -- -- 9.79 289.71 02/09/01 -- -- -- -- -- <5e 04/17/01 -- -- -- -- -- -- -- 8.91 290.59 09/21/01 -- -- -- -- -- -- -- 10.07 289.43 10/23/01 -- -- -- -- -- -- -- 10.94 288.56 12/17/01 -- -- -- -- -- -- -- 9.69 289.81 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 6.98 292.52 08/22/02 -- -- -- -- -- -- -- 10.85 288.65 12/23/02 -- -- -- -- -- -- -- 10.77 288.73 03/13/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.87 291.63 06/05/03 -- -- -- -- -- -- -- 9.59 289.91 09/16/03 -- -- -- -- -- -- -- 13.16 286.34 12/05/03 -- -- -- -- -- -- -- 9.62 289.88 03/22/04 5.3 <1.0 <1.0 <2.0 <100 -- -- 9.48 290.02 06/03/04 -- -- -- -- -- -- -- 10.70 288.80 09/22/04 -- -- -- -- -- -- -- 11.40 288.10 01/04/05 -- -- -- -- -- -- -- 10.21 289.29 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 10.10 288.92 06/24/05 -- -- -- -- -- -- -- 9.84 289.18 09/12/05 -- -- -- -- -- -- -- 8.69 290.33 03/14/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.35 290.67 06/15/06 -- -- -- -- -- -- -- 7.46 291.56 09/13/06 -- -- -- -- -- -- -- 6.11 292.91 12/13/06 -- -- -- -- -- -- -- 8.82 290.20 03/30/07 -- -- -- -- -- -- -- 7.46 291.56 06/04/07 -- -- -- -- -- -- -- 9.70 289.32 09/13/07 -- -- -- -- -- -- -- 11.43 287.59 12/26/07 -- -- -- -- -- -- -- 7.84 291.18 07/08/10 <1.0 <1.0 <1.0 <2.0 <100 -- -- 9.05 289.97 10/29/10 -- -- -- -- -- -- -- 9.26 289.76 MTCA Method A Cleanup Level 5 1,000 700 1,000 800/1,000° 15 22866 Soil -GW Table.xlsx Page 2 of 16 Stantec Consulting Corporation r --1 .., r -) L- LJ r r r u r-) TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -1B 299.74 299.19 04/10/96 _ r. <0.5 <0.5 <0.5 <0.1 <50 -- <2.0 a- -- -- -- 05/09/96 -- -- -- -- -- -- -- 6.87 292.87 11/07/96 1.42 3.28 <0.5 1.73 <50 3.01 -- 9.97 289.77 03/18/97 <0.5 <0.5 <0.5 <1.0 <50 -- -- 5.81 293.93 06/10/97 <0.5 <0.5 <0.5 <1.0 <50 -- -- 7.37 292.37 09/11/97 <0.5 <0.5 <0.5 <1.0 <50 -- -- 9.97 289.77 12/04/97 <0.5 <0.5 <0.5 <1.0 <50 -- -- 7.70 292.04 03/17/98 <0.5 <0.5 <0.5 <1.0 <50 -- -- 7.05 292.69 06/02/98 <0.3 <0.3 <0.5 <0.6 <100 -- -- 8.90 290.84 09/22/98 <0.5 <0.5 <0.5 <1.0 <50 -- -- 11.21 288.53 12/08/98 <0.3 <0.3 <0.5 <0.6 <100 -- -- 7.55 292.19 03/16/99 <0.3 <0.3 <0.5 <0.6 <100 .-- -- 5.72 294.02 06/08/99 <0.3 <0.3 <0.5 <0.6 <100 -- -- 8.30 291.44 09/30/99 <0.3 <0.3 <0.5 <0.6 <100 -- -- 10.54 289.20 12/13/99 0.32 1.24 <0.5 <0.6 <100 -- -- 7.45 292.29 03/01/00 <0.3 <0.3 <0.5 <0.6 <100 -- -- 6.85 292.89 06/06/00 <0.5 0.85 <0.5 <1.0 <100 -- -- 8.41 291.33 08/17/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 10.16 289.58 10/12/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 11.29 288.45 01/17/01 -- -- -- -- -- -- -- 9.18 290.56 04/17/01 -- -- -- -- -- -- -- 8.05 291.69 09/21/01 -- -- -- -- -- -- -- 10.98 288.76 10/23/01 -- -- -- -- -- -- -- 11.40 288.34 12/17/01 -- -- -- -- -- -- -- 6.67 293.07 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 8.32 291.42 08/22/02 -- -- -- -- -- -- -- 10.67 289.07 12/23/02 -- -- -- -- -- -- -- 10.45 289.29 03/13/03 48 2.3 <1.0 <2.0 <100 -- -- 7.32 292.42 06/05/03 48 2.0 <1.0 <2.0 <100 -- -- 9.15 290.59 09/16/03 94 1.0 <1.0 <2.0 <100' -- -- 13.22 286.52 12/05/03 140 2.0 <1.0 <2.0 <100 -- -- 9.29 290.45 03/22/04 68 2.9 1.0 <2.0 <100 -- -- 8.69 291.05 06/03/04 58 1.8 <1.0 <2.0 <100 -- -- 10.59 289.15 09/22/04 88 1.3 3.4 3.2 100 -- -- 11.58 288.16 01/04/05 58 <1.0 <1.0 <2.0 <100 -- -- 9.75 289.99 03/31/05 25 <1.0 <1.0 <2.0 <100 -- -- 9.70 289.49 06/24/05 2.9 <1.0 <1.0 <2.0 130 -- -- 8.64 290.55 09/12/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.61 291.58 03/14/06 5.5 4.9 4.3 <2.6 <100 -- -- 7.60 291.59 06/15/06 68 2.7 3.5 11.1 140 -- -- 8.10 291.09 09/13/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.94 291.25 12/13/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.69 291.50 03/30/07 4.8 <4.0 <4.0 <4.0 <400 -- -- 6.35 292.84 06/04/07 4.7 <1.0 1.2 <4.0 <400 -- -- 9.10 290.09 09/13/07 12 <1.0 <1.0 <2.0 <100 -- -- 11.43 287.76 12/26/07 40 2.3 4.1 2.3 <100 -- -- 7.84 291.35 03/28/08 33 <1.0 1.3 <2.0 <100 -- -- 6.41 292.78 06/25/08 39 <4.0 <4.0 <8.0 <400 -- -- 9.23 289.96 09/25/08 34 <4.0 4.5 7.5 <400 -- -- 11.05 288.14 01/02/09 64 2.0 2.9 1.8 <100 -- -- 7.76 291.43 03/24/09 44 <4.0 <4.0 <8.0 <400 -- -- 7.28 291.91 06/24/09 27 <4.0 <4.0 <8.0 <400 -- -- 9.02 290.17 09/30/09 46 <4.0 <4.0 <8.0 <400 -- -- 9.88 289.31 12/28/09 20 <4.0 <4.0 <8.0 <400 -- -- 5.97 293.22 07/08/10 16 <1.0 <1.0 <2.0 <100 -- -- 8.18 291.01 10/29/10 15 2.6 <1 <3 190 <1 <1 7.93 291.26 MTCA Method A Cleanup Level 5 1,000 700 1,000 800/1,000° 15 22866 Soil -GW Table.xlsx Page 3 of 16 Stantec Consulting Corporation • r r r L I u L. ._ 1 f! L 1 r LJ L_ J l r; -J LJ TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -2A 297.73 297.21 04/10/96 0.96 <0.5 <0.5 <0.1 <50 <2.0 -- -- 05/09/96 -- -- -- -- -- -- -- 6.01 291.72 11/07/96 1.09 1.94 0.533 1.91 <50 3.98 -- 7.95 289.78 03/18/97 -- -- -- -- -- -- -- 5.24 292.49 06/10/97 -- -- -- -- -- -- -- 6.30 291.43 09/11/97 -- -- -- -- -- -- -- 8.36 289.37 12/04/97 -- -- -- -- -- -- -- 6.92 290.81 03/17/98 -- -- -- -- -- -- -- 6.11 291.62 06/03/98 -- -- -- -- -- -- -- 7.28 290.45 09/22/98 -- -- -- -- -- -- -- 9.57 288.16 12/08/98 -- -- -- -- -- -- -- 6.47 291.26 03/16/99 -- -- -- -- -- -- -- 5.15 292.58 06/08/99 -- -- -- -- -- -- -- 6.95 290.78 09/30/99 -- -- -- -- -- - -- 8.13 289.60 12/13/99 -- -- -- -- -- -- -- 5.84 291.89 03/01/00 -- -- -- -- -- -- -- 6.10 291.63 06/06/00 -- -- -- -- -- -- -- 7.04 290.69 08/17/00 -- -- -- -- -- -- -- 8.39 289.34 10/12/00 -- -- -- -- -- -- -- 9.03 288.70 01/17/01 -- -- -- -- -- -- -- 8.05 289.68 04/17/01 -- -- -- -- -- -- -- 6.95 290.78 09/21/01 -- -- -- -- -- -- -- 8.97 288.76 10/23/01 -- -- -- -- -- -- -- 9.47 288.26 12/17/01 -- -- -- -- -- -- -- 6.85 290.88 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 5.96 291.77 08/22/02 -- -- -- -- -- -- -- 9.18 288.55 12/23/02 -- -- -- -- -- -- -- 8.83 288.90 03/13/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 5.94 291.79 06/05/03 -- -- -- -- -- -- -- 7.65 290.08 09/16/03 -- -- -- -- -- -- -- 11.42 286.31 12/05/03 -- -- -- -- -- -- -- 7.86 289.87 03/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.77 289.96 06/03/04 -- -- -- -- -- -- -- 8.90 288.83 09/22/04 -- -- -- -- -- -- -- 9.68 288.05 01/04/05 -- -- -- -- -- -- -- 8.29 289.44 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.16 289.05 06/24/05 -- -- -- -- -- -- -- 8.10 289.11 09/12/05 -- -- -- -- -- -- -- 7.68 289.53 12/06/05 -- -- -- -- -- -- -- 8.03 289.18 03/14/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.55 290.66 06/15/06 -- -- -- -- -- -- -- 7.98 289.23 09/13/06 -- -- -- -- -- -- -- 6.31 290.90 12/13/06 -- -- -- -- -- -- -- 7.13 290.08 03/30/07 -- -- -- -- -- -- -- 5.90 291.31 06/04/07 -- -- -- -- -- -- -- 7.95 289.26 09/13/07 -- -- -- -- -- -- -- 9.70 287.51 12/26/07 -- -- -- -- -- -- -- 7.08 290.13 07/08/10 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.29 289.92 10/29/10 -- -- -- -- -- -- -- 7.64 289.57 MTCA Method A Cleanup Level 5 1,000 700 1,000 80011,0006 15 22866 Soil -GW Table.xlsx Page 4 of 16 Stantec Consulting Corporation .�J r L.J t J I LJ LJ 1 rl Ll LJ L -I TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -2B 297.73 297.22 04/10/96 8.1 <0.5 <0.5 1.5 <50 <2.0 -- -- -- 05/09/96 -- -- -- -- -- -- -- 5.72 292.01 11/07/96 1.92 <0.5 <0.5 <1.0 <50 <2.0 -- 7.83 289.90 03/18/97 2.14 <0.5 <0.5 2.4 152 -- -- 4.78 292.95 06/10/97 5.3 0.756 <0.5 1.09 116 -- -- 5.64 292.09 09/11/97 <0.5 <0.5 <0.5 <1.0 <50 -- -- 8.08 289.65 12/04/97 <0.5 <0.5 <0.5 <1.0 55.5 -- -- 6.00 291.73 03/17/98 2.14 <0.5 <0.5 2.4 152 -- -- 6.59 291.14 06/02/98 <0.3 <0.3 <0.5 <0.6 <100 -- -- 7.15 290.58 09/22/98 <0.5 <0.5 <0.5 <1.0 <50 -- -- 9.14 288.59 12/08/98 <0.3 <0.3 <0.5 0.67 <100 -- -- 5.97 291.76 03/16/99 7.61 <0.3 <0.5 <0.6 <100 -- -- 5.03 292.70 06/08/99 65.6 <0.3 <0.5 <0.6 161 -- -- 6.60 291.13 09/30/99 <0.3 0.47 <0.5 0.79 <100 -- -- 8.55 289.18 12/13/99 <0.3 0.47 <0.5 <0.6 <100 -- -- 5.90 291.83 03/01/00 <0.3 <0.3 <0.5 <0.6 <100 -- -- 5.85 291.88 06/06/00 <0.5 0.94 <0.5 <1.0 <100 -- -- 6.65 291.08 08/17/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 8.26 289.47 10/12/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 9.22 288.51 01/17/01 -- -- -- -- -- -- -- 7.23 290.50 04/17/01 -- -- -- -- -- -- -- 6.30 291.43 09/21/01 -- -- -- -- -- -- -- 9.01 288.72 10/23/01 -- -- -- -- -- -- -- 9.02 288.71 12/17/01 -- -- -- -- -- -- -- 5.44 292.29 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 5.65 292.08 08/22/02 -- -- -- -- -- -- -- 8.92 288.81 12/23/02 -- -- -- -- -- -- -- 7.84 289.89 03/13/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 5.98 291.75 06/05/03 -- -- -- -- -- -- -- 7.56 290.17 09/16/03 -- -- -- -- -- -- -- 11.10 286.63 12/05/03 -- -- -- -- -- -- -- 7.33 290.40 03/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.32 290.41 06/03/04 -- -- -- -- -- -- -- 8.40 289.33 09/22/04 -- -- -- -- -- -- -- 8.64 289.09 01/04/05 -- -- -- -- -- -- -- 7.43 290.30 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.99 290.23 06/24/05 -- -- -- -- -- -- -- 5.87 291.35 09/12/05 -- -- -- -- -- -- -- 4.68 292.54 12/06/05 -- -- -- -- -- -- -- 6.48 290.74 03/14/06 350 110 2.9 114 780 -- -- 6.28 290.94 06/15/06 -- -- -- -- -- -- -- 7.21 290.01 09/13/06 -- -- -- -- -- -- -- 4.68 292.54 12/13/06 -- -- -- -- -- -- -- 4.26 292.96 03/30/07 -- -- -- -- -- -- -- 5.30 291.92 06/04/07 -- -- -- -- -- -- -- 7.30 289.92 09/13/07 -- -- -- -- -- -- -- 9.50 287.72 12/26/07 -- -- -- -- -- -- -- 7.12 290.10 03/28/08 61 3.8 2.6 1.0 <100 -- -- 5.91 291.31 06/25/08 220 8.4 6.2 4.8 <400 -- -- 7.43 289.79 09/25/08 130 <4.0 <4.0 <8.0 <400 -- -- 8.58 288.64 01/02/09 130 <4.0 6.1 <8.0 <400 -- -- 6.98 290.24 03/25/09 150 2.9 8.8 4.3 120 -- -- 5.58 291.64 09/30/09 370 55 11 8.9 <400 -- -- 9.81 287.41 12/28/09 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.62 290.60 07/08/10 700 55 29 60 640 -- -- 6.47 290.75 10/29/10 720 29 17 43 2,500 <1 <1 6.98 290.24 MTCA Method A Cleanup Level 5 1,000 700 1,000 800/1,000° 15 1 22866 Soil -GW Table.xlsx Page 5 of 16 Stantec Consulting Corporation J r - l J r r-• rl r' u r L r, TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID TOC (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes y TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -3A 298.42 297.91 04/10/96 54 3.1 59 120 3,000 <2.0 -- -- -- 05/09/96 -- -- -- -- -- -- -- 6.60 291.82 11/07/96 102 2.71 4.12 10.8 171 2.74 -- 8.67 289.75 03/18/97 -- -- -- -- -- -- -- 5.67 292.75 06/10/97 -- -- -- -- -- -- -- 6.36 292.06 09/11/97 -- -- -- -- -- -- -- 8.69 289.73 12/04/97 -- -- -- -- -- -- -- 7.70 290.72 03/17/98 -- -- -- -- -- -- -- 6.91 291.51 06/03/98 -- -- -- -- -- -- -- 7.83 290.59 09/22/98 -- -- -- -- -- -- -- 9.77 288.65 12/08/98 -- -- -- -- -- -- -- 7.25 291.17 03/16/99 -- -- -- -- -- -- -- 6.24 292.18 06/08/99 -- -- -- -- -- -- -- 7.30 291.12 09/30/99 -- -- -- -- -- -- -- 9.13 289.29 12/13/99 -- -- -- -- -- -- -- 5.76 292.66 03/01/00 -- -- -- -- -- -- -- 5.43 292.99 06/06/00 -- -- -- -- -- -- -- 8.16 290.26 08/17/00 -- -- -- -- -- -- -- 8.63 289.79 10/12/00 -- -- -- -- -- -- -- 9.12 289.30 01/17/01 <0.5 <0.5 0 61` <1.5 <100 -- -- 8.63 289.79 04/17/01 <0.5 <0.5 <0.5 <1.0 <100 -- -- 7.89 290.53 09/21/01 -- -- -- -- -- -- -- 9.14 289.28 10/23/01 -- -- -- -- -- -- -- 9.56 288.86 12/17/01 -- -- -- -- -- -- -- 8.49 289.93 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 6.55 291.87 08/22/02 -- -- -- -- -- -- -- 8.37 290.05 12/23/02 -- -- -- -- -- -- -- 8.96 289.46 03/13/03 3.0 <1.0 2.7 1.1 140 -- -- 8.12 290.30 06/05/03 -- -- -- -- -- -- -- 7.82 290.60 09/16/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 11.72 286.70 12/05/03 -- -- -- -- -- -- -- 8.41 290.01 03/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.30 290.12 06/03/04 -- -- -- -- -- -- -- 9.36 289.06 09/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 9.87 288.55 01/04/05 -- -- -- -- -- -- -- 9.16 289.26 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.46 289.45 06/24/05 -- -- -- -- -- -- -- 7.48 290.43 09/12/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.69 291.22 12/06/05 -- -- -- -- -- -- -- 9.00 288.91 03/14/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.85 291.06 06/15/06 -- -- -- -- -- -- -- 7.46 290.45 09/13/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.19 291.72 03/30/07 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.60 291.31 06/04/07 -- -- -- -- -- -- -- 7.80 290.11 09/13/07 <1.0 <1.0 <1.0 <2.0 <100 -- -- 9.70 288.21 12/26/07 -- -- -- -- -- -- -- 6.42 291.49 07/08/10 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.70 290.21 10/29/10 <1 <1 <1 <3 <100 -- -- 8.44 289.47 MTCA Method A Cleanup Level 5 1,000 700 1,000 1800/1,000° 15 I 22866 Soil -GW Table.xlsx Page 6 of 16 Stantec Consulting Corporation L_ 1 .. 2 ri f1 u r, u n r; u rt r TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -3B 298.36 297.84 04/10/96 190 3.1 41 190 1,500 <2.0 -- -- -- 05/09/96 -- -- -- -- -- -- -- 6.06 292.30 11/07/96 169 4.5 279 185 3,440 <2.0 -- 8.53 289.83 03/18/97 385 16 710 772 12,200 -- -- 5.27 293.09 06/10/97 291 <12.5 546 568 10,200 -- -- 6.54 291.82 09/11/97 98.9 4.56 117 102 2,190 -- -- 8.62 289.74 12/04/97 352 18.4 647 645 7,180 -- -- 6.55 291.81 03/17/98 385 16 710 772 12,200 -- -- 7.87 290.49 06/02/98 300 31 200 190 2,900 -- -- 8.98 289.38 09/22/98 146 5.04 83.3 22.3 973 -- -- 10.65 287.71 12/08/98 0.453 <0.3 <0.50 56.8 152 -- -- 8.39 289.97 03/16/99 <0.3 1.28 0.97 20.4 109 -- -- 4.86 293.50 06/08/99 <0.3 <0.3 <0.5 <0.6 <100 -- -- 7.05 291.31 09/30/99 <0.3 0.48 <0.5 0.95 <100 -- -- 9.08 289.28 12/13/99 <0.3 0.76 <0.5 <0.6 <100 -- -- 6.10 292.26 03/01/00 <0.3 <0.3 <0.5 <0.6 <100 -- -- 5.63 292.73 06/06/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 7.14 291.22 08/17/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 8.74 289.62 10/12/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 9.76 288.60 01/17/01 <0.5 <0.5 0 57` <1.5 <100 -- -- 7.84 290.52 04/17/01 -- -- -- -- -- -- -- 6.77 291.59 09/21/01 -- -- -- -- -- -- -- 9.61 288.75 10/23/01 -- -- -- -- -- -- -- 9.82 288.54 12/17/01 -- -- -- -- -- -- -- 5.73 292.63 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 6.08 292.28 08/23/02 0.516 <1.0 <1.0 2.19 <100 -- -- 9.35 289.01 12/23/02 -- -- -- -- -- -- -- 8.74 289.62 03/13/03 <1.0 <1.0 <1.0 <2.0 100 -- -- 6.13 292.23 06/05/03 -- -- -- -- -- -- -- 7.93 290.43 09/16/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 11.62 286.74 12/05/03 -- -- -- -- -- -- -- 7.71 290.65 03/22/04 <1.0 <1.0 5.6 2.0 260 -- -- 7.77 290.59 06/03/04 -- -- -- -- -- -- -- 9.12 289.24 09/22/04 -- -- -- -- -- -- -- 9.83 288.53 01/04/05 -- -- -- -- -- -- -- 8.45 289.91 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.13 289.71 06/24/05 -- -- -- -- -- -- -- 7.10 290.74 09/12/05 -- -- -- -- -- -- -- 7.00 290.84 12/06/05 -- -- -- -- -- -- -- 7.42 290.42 03/14/06 <1.0 <1.0 <1.0 <2.0 160 -- -- 6.59 291.25 06/15/06 -- -- -- -- -- -- -- 5.42 292.42 09/13/06 -- -- -- -- -- -- -- 5.43 292.41 12/13/06 -- -- -- -- -- -- -- 5.86 291.98 03/30/07 -- -- -- -- -- -- -- 5.62 292.22 06/04/07 -- -- -- -- -- -- -- 7.80 290.04 09/13/07 -- -- -- -- -- -- -- 10.15 287.69 12/26/07 -- -- -- -- -- -- -- 6.13 291.71 07/08/10 <1.0 <1.0 <1.0 <2.0 150 -- -- 7.20 290.64 10/29/10 1.3 1.7 1.0 <3 260 -- -- 7.56 290.28 MTCA Method A Cleanuy Level 5 1,000 700 1,000 80011,000' 15 22866 Soil -GW Table.xlsx Page 7 of 16 Stantec Consulting Corporation rr r L. 1 fl LJ u fl ! r LI r� u r r -' L_ J J r TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID TOC (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes y TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -4A 297.83 297.33 11/07/96 0.846 1.32 0.866 2.49 <50 2.33 -- 8.35 289.48 03/18/97 -- -- -- -- -- -- -- 5.21 292.62 06/10/97 -- -- -- -- -- -- -- 6.33 291.50 09/11/97 -- -- -- -- -- -- -- 8.52 289.31 12/04/97 -- -- -- -- -- -- -- 6.45 291.38 03/17/98 -- -- -- -- -- -- -- 6.23 291.60 06/03/98 -- -- -- -- -- -- -- 7.52 290.31 09/22/98 -- -- -- -- -- -- -- 9.60 288.23 12/08/98 -- -- -- -- -- -- -- 6.37 291.46 03/16/99 -- -- -- -- -- -- -- 5.03 292.80 06/08/99 -- -- -- -- -- -- -- 7.05 290.78 09/30/99 -- -- -- -- -- -- -- 8.79 289.04 12/13/99 -- -- -- -- -- -- -- 5.73 292.10 03/01/00 -- -- -- -- -- -- -- 5.86 291.97 06/06/00 -- -- -- -- -- -- -- 6.75 291.08 08/17/00 -- -- -- -- -- -- -- 8.67 289.16 10/12/00 -- -- -- -- -- -- -- 9.48 288.35 01/17/01 -- -- -- -- -- -- -- 7.55 290.28 04/17/01 -- -- -- -- -- -- -- 6.90 290.93 09/21/01 -- -- -- -- -- -- -- 9.33 288.50 10/23/01 -- -- -- -- -- -- -- 9.58 288.25 12/17/01 -- -- -- -- -- -- -- 6.48 291.35 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 5.91 291.92 08/22/02 -- -- -- -- -- -- -- 9.15 288.68 12/23/02 -- -- -- -- -- -- -- 8.33 289.50 03/13/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.37 291.46 06/05/03 -- -- -- -- -- -- -- 8.02 289.81 09/16/03 -- -- -- -- -- -- -- 11.46 286.37 03/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.22 290.61 06/03/04 -- -- -- -- -- -- -- 8.00 289.83 09/22/04 -- -- -- -- -- -- -- 9.78 288.05 01/04/05 -- -- -- -- -- -- -- 8.35 289.48 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.86 289.47 06/24/05 -- -- -- -- -- -- -- 6.93 290.40 09/12/05 -- -- -- -- -- -- -- 6.24 291.09 12/06/05 -- -- -- -- -- -- -- 7.32 290.01 03/14/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.65 290.68 06/15/06 -- -- -- -- -- -- -- 7.71 289.62 09/13/06 -- -- -- -- -- -- -- 4.18 293.15 12/13/06 -- -- -- -- -- -- -- 4.94 292.39 03/30/07 -- -- -- -- -- -- -- 5.70 291.63 06/04/07 -- -- -- -- -- -- -- 8.00 289.33 09/13/07 -- -- -- -- -- -- -- 10.05 287.28 12/26/07 -- -- -- -- -- -- -- 5.06 292.27 06/24/09 3.2 <1.0 <1.0 <2.0 <100 -- -- 8.13 289.20 07/08/10 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.30 290.03 10/29/10 -- -- -- -- -- -- -- 7.45 289.88 MTCA Method A Cleanup Level 5 1,000 700 1 1,000 80011,000° 15 22866 Soil -GW Table.xlsx Page 8 of 16 Stantec Consulting Corporation r r' 1 r' J t'. r-1 a_1 rl n I._ f r! r LJ u u J TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID TOC (TOC) _ Sample Date Benzene Toluene Ethyl- benzene Total Xylenes y TPH-G _ Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -4B 297.70 297.19 11/07/96 <0.5 <0.5 <0.5 <1.0 <50 <2.0 -- 8.01 289.69 03/18/97 28.5 <0.5 <0.5 <1.0 <50 -- -- 4.96 292.74 06/10/97 40.5 <0.5 <0.5 <1.0 66.8 -- -- 6.10 291.60 09/11/97 <0.5 <0.5 <0.5 <1.0 51.9 -- -- 7.30 290.40 12/04/97 1.54 <0.5 <0.5 2.59 <50 -- -- 6.20 291.50 03/17/98 28.5 <0.5 <0.5 <1.0 <50 -- -- 6.17 291.53 06/02/98 <0.3 <0.3 <0.5 <0.6 <100 -- -- 7.37 290.33 09/22/98 <0.5 <0.5 <0.5 <1.0 <50 -- -- 9.46 288.24 12/08/98 0.533 <0.3 <0.5 <0.6 <100 -- -- 6.20 291.50 03/16/99 <0.3 <0.3 <0.5 <0.6 <100 -- -- 4.83 292.87 06/08/99 <0.3 <0.3 <0.5 <0.6 <100 -- -- 6.82 290.88 09/30/99 <0.3 <0.3 <0.5 1.11 <100 -- -- 8.75 288.95 12/13/99 <0.3 <0.3 <0.5 <0.6 <100 -- -- 5.90 291.80 03/01/00 <0.3 <0.3 <0.5 <0.6 <100 -- -- 5.61 292.09 06/06/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 6.89 290.81 08/17/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 8.51 289.19 10/12/00 <0.5 <0.5 <0.5 <1.0 <100 -- -- 9.41 288.29 01/17/01 -- -- -- -- -- -- -- 7.41 290.29 04/17/01 -- -- -- -- -- -- -- 6.46 291.24 09/21/01 -- -- -- -- -- -- -- 9.29 288.41 10/23/01 -- -- -- -- -- -- -- 9.39 288.31 12/17/01 -- -- -- -- -- -- -- 5.70 292.00 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 6.00 291.70 08/22/02 -- -- -- -- -- -- -- 9.10 288.60 12/23/02 -- -- -- -- -- -- -- 8.11 289.59 03/13/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 5.67 292.03 06/05/03 -- -- -- -- -- -- -- 7.76 289.94 09/16/03 -- -- -- -- -- -- -- 11.29 286.41 12/05/03 -- -- -- -- -- -- -- 7.49 290.21 03/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.54 290.16 06/03/04 -- -- -- -- -- -- -- 8.69 289.01 09/22/04 -- -- -- -- -- -- -- 9.30 288.40 01/04/05 -- -- -- -- -- -- -- 7.97 289.73 04/05/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.61 289.58 06/24/05 -- -- -- -- -- -- -- 6.92 290.27 09/22/05 -- -- -- -- -- -- -- 6.10 291.09 12/06/05 -- -- -- -- -- -- -- 6.75 290.44 03/14/06 1.0 <1.0 1.3 <2.0 <100 -- -- 6.40 290.79 06/15/06 -- -- -- -- -- -- -- 9.84 287.35 09/13/06 -- -- -- -- -- -- -- 5.68 291.51 12/13/06 -- -- -- -- -- -- -- 7.00 290.19 03/30/07 -- -- -- -- -- -- -- 5.45 291.74 06/04/07 -- -- -- -- -- -- -- 7.70 289.49 09/13/07 -- -- -- -- -- -- -- 9.90 287.29 12/26/07 -- -- -- -- -- -- -- 6.82 290.37 06/24/09 5.0 2.4 <1.0 7.0 <100 -- -- 7.82 289.37 07/08/10 <1.0 1.3 1.7 <2.0 <100 -- -- 6.94 290.25 10/29/10 1.9 13 <1 20 120 <1 <1 7.15 290.04 MTCA Method A Cleanup Level 5 1,000 700 1,000 800/1,000° 15 22866 Soil -GW Table.xlsx Page 9 of 16 Stantec Consulting Corporation TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific HighwaySouth,Tukwila, Washington Results in micrograms per liter (pg L) Well ID TOC (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes y TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -5A 299.15 298.64 11/07/96 1,580 3,340 1,820 112,300 70,300 10.2 -- 9.46 289.69 03/18/97 -- -- -- -- -- -- -- 6.81 292.34 06/10/97 -- -- -- -- -- -- -- 7.12 292.03 09/11/97 -- -- -- -- -- -- -- 9.68 289.47 03/17/98 -- -- -- -- -- -- -- 7.57 291.58 06/03/98 -- -- -- -- -- -- -- 8.90 290.25 09/22/98 -- -- -- -- -- -- -- 10.84 288.31 12/08/98 -- -- -- -- -- -- -- 9.24 289.91 03/16/99 -- -- -- -- -- -- -- 6.93 292.22 09/30/99 -- -- -- -- -- -- -- 9.63 289.52 12/13/99 -- -- -- -- -- -- -- 6.89 292.26 03/01/00 -- -- -- -- -- -- -- 9.13 290.02 01/17/01 370 58 1.100` 5,200 34,000 -- -- 9.65 289.50 02/09/01 -- -- -- -- -- <5e -- -- -- 04/17/01 110 36 1,100 3,900 4,000 -- -- 8.36 290.79 09/21/01 180 230 950 5,200 26,000 -- -- 9.63 289.52 10/23/01 150 1,100 75 5,100 28,000 -- -- 10.98 288.17 12/17/01 <50 <50 430 4,100 25,000 -- -- 7.93 291.22 03/14/02 <5 <100 <100 2,040 14,800 -- -- 7.22 291.93 08/23/02 28.1 6.34 118 707.4 4,420 -- -- 10.46 288.69 12/26/02 36.1 8.56 144 819.6 4,700 -- -- 9.48 289.67 03/14/03 130 24 320 1,534 9,900 -- -- 8.34 290.81 06/05/03 290 39 420 1,639 8,900 -- -- 8.16 290.99 09/16/03 380 64 790 3,063 17,000 -- -- 12.66 286.49 12/05/03 200 32 480 1,436 9,700 -- -- 10.80 288.35 03/22/04 160 28 420 1,232 7,900 -- -- 9.76 289.39 06/03/04 190 34 530 1,645 11,000 -- -- 9.34 289.81 09/22/04 170 32 480 1,341 12,000 -- -- 10.34 288.81 01/04/05 180 56 580 1,681 8,500 -- -- 9.57 289.58 03/31/05 180 47 640 1,685 12,000 -- -- 7.93 290.71 06/24/05 92 <1.0 190 96 6,100 -- -- 6.23 292.41 09/12/05 190 55 770 2,986 14,000 -- -- 5.87 292.77 12/06/05 160 30 700 1,532 11,000 -- -- 9.30 289.34 03/14/06 110 100 1,800 6,880 33,000 -- -- 8.49 290.15 06/15/06 21 78 47 320 1,600 -- -- 7.72 290.92 09/13/06 62 32 630 1,943 11,000 -- -- 4.19 294.45 03/30/07 78 38 1,100 2,955 16,000 -- -- 6.41 292.23 06/04/07 91 <50 1,100 2,600 11,000 -- -- 8.75 289.89 09/13/07 83 <50 1,100 2,400 14,000 -- -- 10.55 288.09 12/26/07 82 10 1,100 1,217 9,300 -- -- 7.42 291.22 03/28/08 71 <10 1,400 1,800 11,000 -- -- 5.42 293.22 06/25/08 78 <50 1,300 2,700 15,000 -- -- 8.89 289.75 09/25/08 73 26 1,600 2,847 18,000 -- -- 8.91 289.73 01/02/09 59 6.5 1,200 1,307.2 11,000 -- -- 7.31 291.33 03/24/09 55 5.1 1,100 901.6 8,900 -- -- 7.82 290.82 06/24/09 71 <50 1,300 670 9,600 -- -- 6.11 292.53 09/30/09 36 38 1,700 3,630 23,000 -- -- 8.27 290.37 12/28/09 41 4.3 1,100 370 9,100 -- -- 8.65 289.99 07/09/10 31 2.6 810 122.4 5,000 -- -- 8.76 289.88 10/29/10 -- -- -- -- -- -- -- 8.15 290.49 MTCA Method A Cleanup Level 5 1,000 700 r 1,000 800/1,000° 15 1 22866 Soil -GW Table.xlsx Page 10 of 16 Stantec Consulting Corporation TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) MW -58 299.14 298.63 11/07/96 3,770 1,020 846 4,310 25,000 3.03 -- 9.43 I 289.71 03/18/97 2,660 2,810 815 2,690 27,700 -- -- 6.14 293.00 06/10/97 8,900 25,100 2,770 21,100 151,000 -- -- 7.29 291.85 09/11/97 7,660 15,440 2,320 16,900 101,000 -- -- 9.53 289.61 12/04/97 8,100 16,400 2,970 20,800 110,000 -- -- 7.45 291.69 03/17/98 2,660 2,810 815 2,690 27,700 -- -- 8.70 290.44 06/02/98 98 11 54 110 940 -- -- 9.74 289.40 09/22/98 256 3.62 91.9 57.1 802 -- -- 10.95 288.19 12/08/98 202 2.26 53.2 62.3 984 -- -- 8.01 291.13 03/16/99 1.61 <0.3 <0.5 <0.6 <100 -- -- 4.78 294.36 06/08/99 330 <1.5 <2.5 <3.0 442 -- -- 7.97 291.17 09/30/99 685 591 137 1,430 6,080 -- -- 10.00 289.14 12/13/99 527 417 236 1,170 4,720 -- -- 7.18 291.96 03/01/00 95.2 <0.3 19.4 20.7 434 -- -- 7.50 291.64 06/06/00 250 89 180 190 <100 -- -- 9.17 289.97 08/17/00 100 <5.0 83 30 630 -- -- 10.00 289.14 10/12/00 10 <5.0 21 <10 <1000 -- -- 10.81 288.33 01/17/01 59 2.1 32° <1.5 250 -- -- 9.14 290.00 04/17/01 27 0.74 8.0 <1.0 220 -- -- 8.28 290.86 09/21/01 150 15 71.0 100 1,100 -- -- 11.57 287.57 10/23/01 3.2 1.6 2.3 4.4 170 -- -- 10.81 288.33 12/17/01 33 <0.5 1.4 <1.5 <100 -- -- 7.74 291.40 03/14/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 6.92 292.22 08/23/02 186 4.70 115.0 177.70 1,580 -- -- 10.26 288.88 12/26/02 114 2.77 70.4 57.17 853 -- -- 9.53 289.61 03/14/03 270 8.9 300 487 4,300 -- -- 7.00 292.14 06/05/03 430 18 780 1,411 10,000 -- -- 8.95 290.19 09/16/03 360 <10 280 360 3,700 -- -- 12.55 286.59 12/05/03 340 10 500 340 4,900 -- -- 8.84 290.30 03/22/04 180 7.0 480 463.9 4,600 -- -- 8.75 290.39 06/03/04 360 14.0 890 698.3 8,800 -- -- 10.03 289.11 09/22/04 330 9.2 700 246 7,100 -- -- 10.87 288.27 01/04/05 110 <5.0 210 71 2,000 -- -- 9.28 289.86 03/31/05 38 <1.0 95 35 <100 -- -- 9.23 289.40 06/24/05 3.2 <1.0 <1.0 <2.0 100 -- -- 8.41 290.22 09/12/05 270 <1.0 410 130 4,700 -- -- 7.61 291.02 12/06/05 59 <1.0 95 29 1,600 -- -- 9.51 289.12 03/14/06 93 <4.0 130 <8.0 1,500 -- -- 7.55 291.08 06/15/06 <4.0 <4.0 <4.0 <8.0 <400 -- -- 8.18 290.45 09/13/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.68 290.95 12/13/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.00 291.63 03/30/07 4.7 <1.0 5 <2.0 290 -- -- 6.31 292.32 06/04/07 210 2.9 55 9.5 2,800 -- -- 8.70 289.93 09/13/07 130 <10 33 <20 1,900 -- -- 11.05 287.58 12/26/07 84 10 1,100 1,116 9,700 -- -- 7.32 291.31 03/28/08 210 <10 51 <20 2,600 -- -- 6.96 291.67 06/25/08 160 <4.0 42 8.4 2,700 -- -- 8.85 289.78 09/25/08 56 <4.0 22 7.8 2,000 -- -- 10.52 288.11 01/02/09 23 <1.0 9.7 3.2 870 -- -- 7.16 291.47 03/24/09 76 2.7 28 4.7 1,500 -- -- 7.20 291.43 06/24/09 120 <4.0 31 4.1 2,300 -- -- 4.96 293.67 09/30/09 3.7 <1.0 2.8 <2.0 180 -- -- 10.97 287.66 12/28/09 33 3.4 9.9 4.8 770 -- -- 7.35 291.28 07/09/10 27 2 4.9 1.3 460 -- -- 8.12 290.51 10/29/10 -- -- -- -- -- -- -- 8.56 290.07 MTCA Method A Cleanup Leve 5 1,000 700 ( 1,000 800/1,000° 15 F 22866 Soil -GW Table.xlsx Page 11 of 16 Stantec Consulting Corporation TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (ug L) Well ID TOC (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes y TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) DPE-1 NS 297.36 12/04/97 i 7.97 7.48 64 23.1 1,090 03/15/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 5.67 -- 08/22/02 -- -- -- -- -- -- -- 8.98 -- 12/23/02 -- -- -- -- -- -- -- 8.18 -- 03/14/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 5.85 -- 06/05/03 -- -- -- -- -- -- -- 7.62 -- 09/16/03 -- -- -- -- -- -- -- 11.29 -- 12/05/03 -- -- -- -- -- -- -- 7.51 -- 03/22/04 <1.0 <1.0 1.9 <2.0 <100 -- -- 7.44 -- 06/03/04 -- -- -- -- -- -- -- 8.67 -- 09/22/04 -- -- -- -- -- -- -- 9.13 -- 01/04/05 -- -- -- -- -- -- -- 7.80 -- 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.36 290.00 06/24/05 -- -- -- -- -- -- -- 7.10 290.26 09/12/05 -- -- -- -- -- -- -- 6.98 290.38 12/06/05 -- -- -- -- -- -- -- 6.31 291.05 03/14/06 1,200 77 3.5 42 480 -- -- 6.39 290.97 06/15/06 -- -- -- -- -- -- -- 7.41 289.95 09/13/06 -- -- -- -- -- -- -- 6.94 290.42 12/13/06 -- -- -- -- -- -- -- 5.87 291.49 03/30/07 -- -- -- -- -- -- -- 5.36 292.00 06/04/07 -- -- -- -- -- -- -- 7.50 289.86 09/13/07 -- -- -- -- -- -- -- 9.65 287.71 12/26/07 -- -- -- -- -- -- -- 6.72 290.64 06/24/09 200 12 <4.0 4.4 <400 -- -- 7.56 289.80 07/08/10 960 24 20 20.7 410 -- -- 6.75 290.61 DPE-2 NS 297.79 03/15/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 6.05 -- 08/22/02 -- -- -- -- -- -- -- 9.40 -- 03/13/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 5.92 -- 06/05/03 -- -- -- -- -- -- -- 1.69 -- 09/16/03 -- -- -- -- -- -- -- 2.71 -- 12/05/03 -- -- -- -- -- -- -- 7.41 -- 03/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.88 -- 06/03/04 -- -- -- -- -- -- -- 9.05 -- 09/22/04 -- -- -- -- -- -- -- 9.66 -- 01/04/05 -- -- -- -- -- -- -- 8.45 -- 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.64 290.15 06/24/05 -- -- -- -- -- -- -- 7.23 290.56 09/12/05 -- -- -- -- -- -- -- 4.21 293.58 12/06/05 -- -- -- -- -- -- -- 7.33 290.46 03/14/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.70 291.09 06/15/06 -- -- -- -- -- -- -- 9.61 288.18 09/13/06 -- -- -- -- -- -- -- 5.21 292.58 12/13/06 -- -- -- -- -- -- -- 6.03 291.76 03/30/07 -- -- -- -- -- -- -- 5.82 291.97 06/04/07 -- -- _ -- -- -- -- 7.90 289.89 09/13/07 -- -- -- -- -- -- -- 10.20 287.59 12/26/07 -- -- -- -- -- -- -- 6.76 291.03 07/08/10 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.25 290.54 MTCA Method A Cleanup Level 5 1,000 700 1,000 800/1,000° 15 22866 Soil -GW Table.xlsx Page 12 of 16 Stantec Consulting Corporation TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) DPE-3 NS 298.26 03/15/02 3.15 <1.0 3.89 <1.0 60.1 -- -- 6.34 -- 08/23/02 2.6 <1.0 0.614 2.27 <100 -- -- 9.81 -- 12/23/02 -- -- -- -- -- -- -- 9.23 -- 03/13/03 2.7 <1.0 2.5 <2.0 130 -- -- 6.63 -- 06/05/03 -- -- -- -- -- -- -- 8.45 -- 09/16/03 -- -- -- -- -- -- -- 12.15 -- 12/05/03 -- -- -- -- -- -- -- 8.42 -- 03/22/04 3.5 <1.0 6.6 19.5 210 -- -- 8.23 -- 06/03/04 -- -- -- -- -- -- -- 9.60 -- 09/22/04 -- -- -- -- -- -- -- 10.40 -- 01/04/05 -- -- -- -- -- -- -- 8.92 -- 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.57 289.69 06/24/05 -- -- -- -- -- -- -- 8.10 290.16 09/12/05 -- -- -- -- -- -- -- 9.26 289.00 12/06/05 -- -- -- -- -- -- -- 7.98 290.28 03/14/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.10 291.16 06/15/06 -- -- -- -- -- -- -- 8.00 290.26 09/13/06 -- -- -- -- -- -- -- 7.10 291.16 12/13/06 -- -- -- -- -- -- -- 7.13 291.13 03/30/07 -- -- -- -- -- -- -- 6.09 292.17 06/04/07 -- -- -- -- -- -- -- 7.90 290.36 09/13/07 -- -- -- -- -- -- -- 10.60 287.66 12/26/07 -- -- -- -- -- -- -- 7.08 291.18 07/08/10 <1.0 1.1 <1.0 <2.0 <100 -- -- 7.66 290.60 10/29/10 <1 <1 <1 <3 <100 -- -- 7.89 290.37 DPE-4 NS 298.52 03/15/02 468 718 183 1,914 9,600 -- -- 7.10 -- 08/23/02 411 131 202 901 4,910 -- -- 10.20 -- 12/26/02 1,470 1,550 545 2,220 12,400 -- -- 9.47 -- 03/14/03 1,300 130 570 850 9,100 -- -- 6.99 -- 06/05/03 2,800 450 1,200 3,040 21,000 -- -- 8.87 -- 09/16/03 3,500 240 1,600 3,730 23,000 -- -- 12.48 -- 12/05/03 1,200 140 720 2,210 14,000 -- -- 8.82 -- 03/22/04 1,700 37 670 1,065 9,100 -- -- 8.70 -- 06/03/04 3,100 69 1,500 2,760 21,000 -- -- 10.00 -- 09/22/04 2,700 72 1,300 2,100 21,000 -- -- 10.59 -- 01/04/05 570 11 600 580 6,500 -- -- 9.27 -- 03/31/05 720 150 450 570 6,400 -- -- 8.87 289.65 06/24/05 110 <1.0 220 100 7,700 -- -- 8.23 290.29 09/12/05 170 49 730 2,584 13,000 -- -- 7.68 290.84 12/06/05 230 <1.0 64 28 1,700 -- -- 8.70 289.82 03/14/06 420 7.9 120 15.0 1,700 -- -- 7.52 291.00 06/15/06 2,300 230 230 680 6,500 -- -- 6.94 291.58 09/13/06 2,600 83 360 973 8,500 -- -- 6.11 292.41 12/13/06 2.6 <1.0 <1.0 8.0 170 -- -- 6.98 291.54 03/30/07 380 7.4 64 81 2,400 -- -- 6.57 291.95 06/04/07 870 8.4 30 58.1 1,900 -- -- 8.40 290.12 09/13/07 1,700 12 53 45 2,300 -- -- 10.90 287.62 12/26/07 2,000 18 23 44 1,600 -- -- 7.71 290.81 03/28/08 640 <10 16 19 1,400 -- -- 6.38 292.14 06/25/08 980 5.0 9.3 11 1,200 -- -- 8.53 289.99 09/25/08 1,300 720 260 1,030 7,700 -- -- 10.48 288.04 01/02/09 520 13 34 116 1,400 -- -- 7.58 290.94 03/25/09 46 <1.0 1.2 9.2 250 -- -- 7.18 291.34 06/24/09 810 <4.0 <4.0 6.9 630 -- -- 8.94 289.58 09/30/09 240 18 21 108 1,100 -- -- 10.88 287.64 12/28/09 85 <4.0 9.6 14.8 500 -- -- 7.32 291.20 07/09/10 1,100 9.0 5.1 48.5 710 -- -- 8.07 290.45 MTCA Method A Cleanup Level 5 1,000 700 1,000 800/1,000 j 15 22866 Soil -GW Table.xlsx Page 13 of 16 Stantec Consulting Corporation r r lJ n •-J r" r r \_J L1 r TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (Ng L) Well ID (TOC) Sample Date Benzene Toluene Ethyl- benzene Total Xylenes TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) DPE-5 NS 298.29 03/15/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 6.72 -- 08/23/02 856 469 225 1,216 7,170 -- -- 9.83 -- 12/23/02 -- -- -- -- -- -- -- 9.17 -- 03/14/03 1,100 3,400 1,500 11,400 76,000 -- -- 6.78 -- 06/05/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.89 -- 09/16/03 2,700 7,000 1,800 10,800 77,000 -- -- 12.19 -- 12/05/03 41 39 100 4,300 25,000 -- -- 8.34 -- 03/22/04 330 73 75 1,900 19,000 -- -- 8.50 -- 06/03/04 1900 1,600 650 7,100 54,000 -- -- 9.75 -- 09/22/04 1,700 2,200 280 1,290 14,000 -- -- 10.53 -- 01/04/05 -- -- -- -- -- -- -- 9.08 -- 03/31/05 3000 2,300 1,400 8,600 63,000 -- -- 8.62 289.67 06/24/05 3000 110 1,200 470 12,000 -- -- 7.96 290.33 09/12/05 4,200 3,300 1,800 12,000 82,000 -- -- 6.20 292.09 12/06/05 2,500 1,800 1,400 8,400 57,000 -- -- 9.20 289.09 03/14/06 1,100 450 910 6,800 45,000 7.37 290.92 06/15/06 1,800 120 130 420 3,900 -- -- 5.23 293.06 09/13/06 3,300 2,400 1,500 7,200 43,000 -- -- 4.98 293.31 12/13/06 37 2.8 23 90.1 1,200 -- -- 6.43 291.86 03/30/07 1,200 820 2,300 14,600 87,000 -- -- 6.41 291.88 06/04/07 1,700 1,400 1,700 10,800 40,000 -- -- 8.70 289.59 09/13/07 2,200 2,000 1,700 9,900 62,000 -- -- 10.71 287.58 12/26/07 930 1,600 1,600 9,700 55,000 -- -- 7.37 290.92 03/28/08 790 610 1,900 11,200 51,000 -- -- 6.47 291.82 06/25/08 860 450 1,300 7,700 47,000 -- -- 8.85 289.44 09/25/08 2,200 1,300 1,600 8,800 59,000 -- -- 10.03 288.26 01/02/09 380 170 1,100 5,500 39,000 -- -- 7.22 291.07 03/25/09 44 14 190 1,820 14,000 -- -- 7.03 291.26 06/24/09 440 <100 200 1,460 20,000 -- -- 8.79 289.50 09/30/09 2,100 3,100 1,300 12,400 65,000 -- -- 10.71 287.58 12/28/09 11 <10 16 330 6,000 -- -- 7.25 291.04 07/09/10 150 36 43 340 3,400 -- -- 7.96 290.33 DPE-6 NS 298.81 03/15/02 <0.5 <1.0 <1.0 <1.0 <100 -- -- 6.85 -- 08/23/02 <0.5 <1.0 <1.0 <2.0 <100 -- -- 10.24 -- 12/23/02 -- -- -- -- -- -- -- 9.53 -- 03/13/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 6.85 -- 06/05/03 -- -- -- -- -- -- -- 8.94 -- 09/16/03 -- -- -- -- -- -- -- 12.55 -- 12/05/03 -- -- -- -- -- -- -- 8.71 -- 03/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.80 -- 06/03/04 -- -- -- -- -- -- -- 10.05 -- 09/22/04 -- -- -- -- -- -- -- 10.95 -- 01/04/05 -- -- -- -- -- -- -- 9.38 -- 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.91 289.90 06/24/05 -- -- -- -- -- -- -- 7.43 291.38 09/12/05 -- -- -- -- -- -- -- 6.81 292.00 12/06/05 -- -- -- -- -- -- -- 9.52 289.29 03/14/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.55 291.26 06/15/06 -- -- -- -- -- -- -- 6.27 292.54 09/13/06 -- -- -- -- -- -- -- 6.19 292.62 12/13/06 -- -- -- -- -- -- -- 6.97 291.84 03/30/07 -- -- -- -- -- -- -- 6.53 292.28 06/04/07 -- -- -- -- -- -- -- 8.90 289.91 09/13/07 -- -- -- -- -- -- -- 11.15 287.66 12/26/07 -- -- -- -- -- -- -- 7.03 291.78 06/24/09 <1.0 <1.0 <1.0 <2.0 <100 -- -- 9.04 289.77 09/30/09 <1.0 <1.0 <1.0 <2.0 <100 -- -- 11.05 287.76 07/09/10 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.17 290.64 MTCA Method A Cleanup Level j 5 1,000 700 1,000 800/1,000° 15 1 22866 Soil -GW Table.xlsx Page 14 of 16 Stantec Consulting Corporation J u u r n u u n iJ L J TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID (TOC) TOC Sample Date Benzene Toluene Ethyl- benzene Total Xylenes y TPH-G Total Lead Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) DPE-7 NS NS 298.97 03/15/02 8.33 <2 68.6 215.5 1,120 -- -- 7.19 -- 08/23/02 5.4 0.83 100 57.27 1,330 -- -- 9.62 -- 12/26/02 0.41 <1.0 <1.0 <3.0 68.1 -- -- 9.87 -- 03/14/03 1.8 <1.0 14 5.3 310 -- -- 7.30 -- 06/05/03 8.1 1.2 100 26.1 1,400 -- -- 9.28 -- 09/16/03 11 <1.0 32 3.8 530 -- -- 12.76 -- 12/05/03 5.0 <1.0 45 10.3 840 -- -- 9.23 -- 03/22/04 13 <5.0 140 30 1,400 -- -- 9.08 -- 06/03/04 10 2.4 180 92 3,000 -- -- 10.40 -- 09/22/04 7.0 2.0 84 11.7 1,700 -- -- 11.24 -- 01/04/05 71 21 900 2,880 15,000 -- -- 9.70 -- 03/31/05 47 8.9 750 1,520 14,000 -- -- 9.21 289.76 06/24/05 330 6.7 140 15 1,700 -- -- 8.48 290.49 09/12/05 19 7.6 150 91 4,200 -- -- 7.64 291.33 12/06/05 6.2 <1.0 29 <1.0 1,200 -- -- 9.88 289.09 03/14/06 8.0 <4.0 110 20 1,900 7.85 291.12 06/15/06 790 46 350 191 5,000 -- -- 10.11 288.86 12/13/06 2.6 <1.0 <1.0 8.0 160 -- -- 7.11 291.86 03/30/07 3.3 <1.0 4.6 2.3 720 -- -- 6.90 292.07 06/04/07 2.5 <1.0 2.6 1.3 560 -- -- 9.20 289.77 09/13/07 <4.0 <4.0 <4.0 <8.0 450 -- -- 11.35 287.62 12/26/07 2.8 <1.0 1.4 1.7 460 -- -- 7.35 291.62 03/28/08 2.1 <1.0 <1.0 <2.0 440 -- -- 6.98 291.99 06/25/08 <4.0 <4.0 <4.0 <8.0 <400 -- -- 9.33 289.64 09/25/08 20 3.9 280 978 5,400 -- -- 10.90 288.07 01/02/09 8.3 <1.0 68 192 2,600 -- -- 7.18 291.79 03/24/09 3.5 <1.0 5.6 2.7 870 -- -- 8.02 290.95 06/24/09 <4.0 <4.0 <4.0 <8.0 790 -- -- 9.36 289.61 12/28/09 <4.0 <4.0 10 7.1 1,100 -- -- 7.76 291.21 07/09/10 1.5 <1.0 1.1 <2 560 -- -- 8.52 290.45 MTCA Method A Cleanup Level 5 1,000 700 1,000 800/1,000° 15 22866 Soil -GW Table.xlsx Page 15 of 16 Stantec Consulting Corporation TABLE 2 GROUNDWATER MONITORING AND ANALYTICAL RESULTS 7 -Eleven Store #22866 14207 Pacific Highway South,Tukwila, Washington Results in micrograms per liter (pg L) Well ID TOC (TOC) Sample Date .. _ Benzene Toluene Ethyl- benzene Total Xylenes y y TPH-G Total Lead ..- Dissolved Lead Depth To Groundwater (feet from TOC) Groundwater Elevation (feet) DPE-8 NS 300.25 03/15/02 <0.5 <1.0 <1.0 <1.0 71.5 -- -- 7.25 -- 08/23/02 0.926 <1.0 1.69 <2.0 273 -- -- 11.27 -- 12/26/02 <0.5 <1.0 <1.0 <3.0 122 -- -- 10.98 -- 03/13/03 <1.0 <1.0 <1.0 <2.0 260 -- -- 7.92 -- 06/05/03 <1.0 <1.0 <1.0 <2.0 180 -- -- 9.68 -- 09/16/03 <1.0 <1.0 <1.0 <2.0 110 -- -- 13.86 -- 12/05/03 <1.0 <1.0 <1.0 <2.0 <100 -- -- 10.02 -- 03/22/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 9.12 -- 06/03/04 <1.0 <1.0 <1.0 <2.0 <100 -- -- 11.20 -- 09/22/04 <1.0 <1.0 <1.0 <2.0 170 -- -- 12.36 -- 01/04/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 10.59 -- 03/31/05 <1.0 <1.0 <1.0 <2.0 <100 -- -- 10.14 290.11 06/24/05 -- -- -- -- -- -- -- 9.10 291.15 09/12/05 -- -- -- -- -- -- -- 8.10 292.15 12/06/05 -- -- -- -- -- -- -- 11.00 289.25 03/14/06 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.83 292.42 06/15/06 -- -- -- -- -- -- -- 8.14 292.11 09/13/06 -- -- -- -- -- -- -- 8.16 292.09 12/13/06 -- -- -- -- -- -- -- 8.68 291.57 03/30/07 -- -- -- -- -- -- -- 6.51 293.74 06/04/07 -- -- -- -- -- -- -- 9.60 290.65 09/13/07 -- -- -- -- -- -- -- 12.15 288.10 12/26/07 -- -- -- -- -- -- -- 6.97 293.28 03/24/09 <1.0 <1.0 <1.0 <2.0 <100 -- -- 7.70 292.55 07/09/10 <1.0 <1.0 <1.0 <2.0 <100 -- -- 8.78 291.47 MTCA Method A Cleanup Level 5 1,000 700 1,000 800/1,000° 15 Explanation of Abbreviations: TOC = Top of casing; elevations are based on an arbitrary benchmark. TPH-G = total petroleum hydrocarbons as gasoline MTCA = Model Toxics Control Act = less than the laboratory practical quantitation limit = not sampled, not measured or not analyzed NS = not surveyed Notes: Bold values exceed the MTCA Method A Cleanup Level a dissolved lead b The TPH-G cleanup level is reduced from 1,000 pg/L to 800 pg/L if benzene is present in the sample Method blank contamination (1-17-01) d Light -end hydrocarbons outside the defined gasoline range are present in sample (MW -1B on 9-16-03) " Estimated concentration calculated for an analyte response above the valid instrument calibration range. A diluation is required to obtain an accurate quantification of the analyte. Combined DPE/SVE remediation system operations commenced on February 25, 1998. 22866 Soil -GW Table.xlsx Page 16 of 16 Stantec Consulting Corporation FIGURES L , L L J L 1 n LJ I- 1 L_1 r� \iRL`jt�'c�st�o►ea7 oft. F irifffinat fiwg TAW 71 ‘" Itr tr tta��,,_ 711 �r Sa,Aa„ti _ � � . 1 ,MSU `, ll(P, WASHINGTON 1/2 I-1 I-1 I--1 0 F—I F—I I y q.t• •eE0116,am- Co. ht 02001 MI ••- la OWN , Ihe. SCALE (MILES) 1000 0 1000 2000 3000 4000 5000 6000 7000 H H H REFERENCE: USGS 7.5 MINUTE QUADRANGLE; DES MOINES, WASHINGTON; 1995 Stantec 12034 134th COURT NORTHEAST, SUITE 102 REDMOND, WASHINGTON 98052 PHONE: (425) 298-1000 FAX: (425) 298-1020 FOR: ELEV FACILITY NO. 22866 14207 PACIFIC HIGHWAY SOUTH TUKWILA, WASHINGTON JOB NUMBER: 212302520 DRAWN BY: SCALE (FEET) No warranty is made by Stantec as 10 the accuracy, reliability, or completeness of these data. Original data were compiled from various sources. This Information may nol meet National Map Accuracy Standards. Thls product was developed electronically, and may be updated without notification. Any reproduction may result M a loss of scale and or Information. jr SITE LOCATION MAP CHECKED BY: PICADDIPROJECTS12010t7-11122866\DWGt7- 11 22866_2010.dwg modified by Ire^endi- on Dec 07 2010 - 20-04 APPROVED BY: FIGURE: 1 DATE: 8/13/09 0 • OSP-5 FORMER TANKS MW-1BZ OMW-1A SP -4® SS -4@12' 7 -ELEVEN FACILITY NO. 22866 S. 142ND STREET ----7 MW4Bq5 ZMW-2A PL -2@2 . SS -1@1 TO — \1 TP1A SS -2@12'0 IPE -3 I' 20 40 APPROXIMATE SCALE (FEET) • BH -1 A FORMER DISPENSERS l 1 ' DP -2@2' SP -2 D1 ialkjMW-4A ��MW-4B SP -3 PL -1@2' D2 BH -8 DPE-20 • MW-3BZ zMW-3A B3 Mb B -1A •BH -5 DPE-4O BH -4• BH -2 -2 • MW-5AZOMW-5B BH -3• DPE-7O • B5 DPE-8O B611 • BH -7 DPE-5 B411 •BH -6 6 DPE-6 r r r No warranty is made by Stantec as to the accuracy, curacy, reliability, or completeness of these data. Original data were compied from various sources. This Information may not meet National Map Accuracy Standards. This product was developed electronically, and may be updated without notification. Any reproduction may result Ina loss of scale and o hlormatlon. DP -1@2' LEGEND SUBJECT PROPERTY LINE BOUNDARY EXTENT OF 2010 EXCAVATION MW -4B GROUNDWATER MONITORING WELL LOCATION DPE-8 ® DUAL PHASE EXTRACTION WELL D1 A SOIL BORING LOCATION (FLUOR DANIEL GTI, OCTOBER 1995) B1 • SOIL BORING LOCATION (ITC, NOVEMBER 1999) B -1A 0 SOIL BORING LOCATION (ITC, AUGUST 2000) BH -1 • SOIL BORING LOCATION (SECOR, DECEMBER 2004) 0 SOIL SAMPLE LOCATION (STANTEC OCTOBER / NOVEMBER 2010) StanteC 12034 134th COURT NORTHEAST, SUITE 102 REDMOND, WASHINGTON 98052 PHONE: (425) 298-1000 FAX: (425) 298-1020 FOR: ELe FACILITY NO. 22866 14207 PACIFIC HIGHWAY SOUTH TUKWILA, WASHINGTON SITE PLAN WITH HISTORIC SOIL SAMPLE LOCATIONS FIGURE: 2 JOB NUMBER: 212302520 DRAWN BY: jr CHECKED BY: APPROVED BY: DATE: 1/6/11 P-ICADDIPROJECTSt2010i7-111228661DWG17-11 _22866. 2010.dwg modifiad by Ireacndir on Jan 06, 2011 - 10:45 STOCKPILE 7 -ELEVEN FACILITY BAKER FORMER TANKS APPROXIMATF TOCKPILE #22 FORMER ! DISPENSERS Stantec 12034 134th COURT NORTHEAST, SUITE 102 REDMOND, WASHINGTON 98052 PHONE: (425) 298-1000 FAX: (425) 298-1020 FACILITY NO. 22866 14207 PACIFIC HIGHWAY SOUTH TUKWILA, WASHINGTON LEGEND SUBJECT PROPERTY LINE BOUNDARY EXTENT OF EXCAVATION STOCKPILE BOUNDARY BAKER TANK GROUNDWATER MONITORING WELL LOCATION DPE-8 ® DUAL PHASE EXTRACTION WELL 0 SOIL SAMPLE LOCATION SS SIDE WALL SAMPLE SP STOCKPILE SAMPLE DP DISPENSER ISLAND SAMPLE PL PRODUCT LINE SAMPLE SAMPLE ID SAMPLE DATE / DEPTH BENZENE TOLUENE ETHYLBENZENE TOTAL XYLENES TOTAL PETROLEUM HYDROCARBONS AS GASOLINE ALL CONCENTRATIONS IN mg/kg BOLD INDICATES CONCENTRATION ABOVE ACTION LEVEL No warranty Is made by Stentec as to the accuracy. reliability, or completeness of these data. Original data were compNed from various sources. This information may not meet National Map Accuracy Standards. This product was eveioped electronicaly, and may be updated without notification. Any reproduction may result in a loss of scale and or information. SOIL SAMPLING ANALYTICAL RESULTS OCTOBER 27 - NOVEMBER 3, 2010 FIGURE: JOB NUMBER: 212302520 DRAWN BY: CHECKED BY: APPROVED BY: S. 942ND STREET I FOR'FR (291.24) I IDISPENSERS 7 -ELEVEN FACILITY NO. 22866 30 60 APPROXIMATE SCALE (FEET) 12034 134th COURT NORTHEAST, SUITE 102 REDMOND, WASHINGTON 98052 PHONE: (425) 298-1000 FAX: (425) 298-1020 FACILITY NO. 22866 14207 PACIFIC HIGHWAY SOUTH TUKWILA, WASHINGTON LEGEND SUBJECT PROPERTY LINE BOUNDARY GROUNDWATER MONITORING WELL LOCATION DUAL PHASE EXTRACTION WELL RELATIVE GROUNDWATER ELEVATION (FEET) No warranty is made by Stantec as to the accuracy, reliability, or completeness of these data. Origina data were complied from venous sources. This Information may not meet National Map Accuracy Standards. This product was developed electronically, and may be updated without notification. Any reproduction may result In a loss of scale and o information. GROUNDWATER ELEVATION MAP OCTOBER 29, 2010 FIGURE: JOB NUMBER: 212302439 DRAWN BY: CHECKED BY: P:\CAODVPROJECTSt201017-11\228661DWG\7-11 22866. 2010.dwg mod) ied by jrescndi7 on Jan 06 2011 - 11:'8 APPROVED BY: I FORMER I TANKS FACILITY NO. 22866 30 60 APPROXIMATE SCALE (FEET) S. 742ND STREET FORMER DISPENSERS LEGEND ANALYTE SUBJECT PROPERTY LINE BOUNDARY MW -4B GROUNDWATER MONITORING WELL LOCATION DPE-8 O DUAL PHASE EXTRACTION WELL (NS) NOT SAMPLED MW -1B DATE BENZENE TOLUENE ETHYLBENZENE XYLENES TPH-G GASOLINE ALL RERUSLTS IN MICROGRAMS PER LITER (pg/L) BOLD VALUES EXCEED THE MTCA METHOD A CLEANUP LEVEL No warranty is made by Stantec as to the accuracy, reliability, or completeness of these data. Original data were compiled from various sources. This information may not meet National Map Accuracy Standards. This product was developed electronically, and may be updated without notification. Any reproduction may result In a loss of scale and o infcenatlon. Stantec 12034 134th COURT NORTHEAST, SUITE 102 REDMOND, WASHINGTON 98052 PHONE: (425) 298-1000 FAX: (425) 298-1020 FOR: FACILITY NO. 22866 14207 PACIFIC HIGHWAY SOUTH TUKWILA, WASHINGTON GROUNDWATER ANALYTICAL RESULTS OCTOBER 29, 2010 FIGURE: JOB NUMBER: 212302439 DRAWN BY: JR CHECKED BY: AM APPROVED BY: AM DATE: 1/6/11 P:\CADDIPROJECTS12010tI-111228661DWG: -11 22866 2010.dwg modi led by jresendi2 on Jan 07, 2011 - 11:01 APPENDIX A DEPARTMENT OF ECOLOGY UST NOTICES AND CHECKLISTS � J La r. LJ l r-' VAS111iT01 STATE EECAOTLEOTG UNDERGROUND STORAGE TANK 30 DAY NOTICE See back of form for instructions Please ✓ the appropriate box: ❑ Intent ® Intent ❑ Both to Install to Close UBI Number FOR OFFICE USE ONLY Site ID #: FS ID #: Site Information Owner Information (This form will be retumed to this address) UST Owner/Operator 7 -Eleven, Inc. Mailing Address 578-070-490 001 0058 Site/Business Name 7 -Eleven Store #22866 Street Site Address 14207 Pacific Highway South City/State Tukwila/WA Zip Code 98168 Telephone ( 206) 241-1519 Street P.O. Box 711 City/State Dallas/TX P.O. Box Zip Code 75221-0711 Telephone I SJ 255-0711 Tank Installation Company (if known). Fill out this section ONLY if tanks are being installed. Service Company Contact Name r • Address r' L J r• L L. J LJ J Street P.O. Box City Slate Zip Code Telephone ( ) Tank Permanent Service Company Address Closure Company (if known). Fill out this section ONLY if tanks are being closed. To Be Determined Contact Name Street P.O. Box Telephone (J City State Zip Code Tank ID REG Projected Closure Date 9-30-2010 Tank Closure Information Fill out this section ONLY if tanks are being closed. Tank Substance Date Tank Capacity Stored Last Used 12,000 Unleaded Gas Unknown Is There Product In the Tank (Yes/No) Yes If No, Date Tank Was Pumped Tank Installation Information Fill out this section ONLY if tanks are being installed. Approx. Tank ID Install Date NOL 9-30-2010 12,000 Unleaded Gas Unknown Yes SNL 9-30-2010 12,000 Unleaded Gas Unknown Yes r ECY 020-95 (Rev. 01-06) AFTER COMPLETING THIS FORM. RETURN TO: Instructions Please Read Carefully Check the appropriate box for tank closure, tank installation, or both. Site and Owner Information TOXICS CLEANUP PROGRAM DEPARTMENT OF ECOLOGY P.O. BOX 47655 OLYMPIA, WA 98504-7655 Fill in the site and owner information. Please include the Ecology site number for tank closures; also, be sure to provide telephone numbers so that any problems can be resolved quickly. Confirmation of receipt of this form will be returned to the owner. Tank Installation Company List the installation company, if known. Upon receipt of the completed form, Ecology will validate it and return it to the owner. This validated form allows you to receive a one time drop of product, for UST system testing purposes only. To dispense product and receive additional deliveries, you must complete the Master Business License registration and obtain your Tank Tag from Ecology. The registration information must be submitted to the Department of Licensing within 30 days of installation to receive a Master Business License with the appropriate tank endorsement(s). Tank Permanent Closure Company List the closure company, if known. Upon receiving a completed 30 day closure form, Ecology will stamp the date received on the form and return a copy to the owner. Contact your local fire marshal and planning department prior to tank closure to find out if any additional permits are required by county or other local jurisdictions. Compliance with the State Environmental Policy Act (SEPA) Rules, Chapter 197-11 WAC, may be necessary. Closure may proceed 30 days after the date stamped on the form. A site assessment is required at the time of closure. Contamination found or suspected at the site must be reported to the appropriate Ecology regional office within 24 hours. If the contamination is confirmed, a site characterization report must be submitted to the regional office within 90 days; if contamination is not confirmed, a site assessment report must be submitted to the above address within 30 days. Please note: Individuals performing UST services MUST be certified by the International Code Council (ICC), or have passed another qualifying exam approved by the Department. Tank Information List tanks to be installed or closed. Please report tank ID number(s) for tanks to be closed and assign new tank ID number(s) to tanks being installed. Do not use existing numbers from closed tanks. The following tanks are exempt from notification requirements: • Farm or residential tanks, 1,100 gallons or less, used to store motor fuel for personal or farm use only. The fuel must not be for resale or used for business purposes. ❖ Tanks used for storing heating oil that is used on the premises where the tank is located. ❖ Tanks with a capacity of 110 gallons or less. ❖ Equipment or machinery tanks such as hydraulic lifts or electrical equipment tanks. 4. Emergency overflow tanks, catch basins, or sumps. ri I r L_J L L , L_J • LJ ..J tttr.111311 WASHINGTON STATE DEP ATErG ECOLOGY UNDERGROUND STORAGE TANK Closure and Site Assessment Notice See back of form for instructions Please ✓ the appropriate box(es) ❑ Temporary Tank Closure ❑ Change -In -Service Site ID Number Site Information 8603 (Available from Ecology if the tanks are registered) Site/Business Name 7 -Eleven Store #22866 Street Site Address 14207 Pacific Highway South City/State Tukwila/WA Zip Code 98168 Owners Signature Telephone 20 241-1519 FOR OFFICE USE ONLY Site ID*: Facility Site ID #: Permanent Tank Closure ® Site Check/Site Assessment Owner Information UST Owner/Operator 7 -Eleven, Inc. Mailing Address Street P.O. Box 711 City/State Dallas/TX P.O. Box Zip Code 75221-0711 Telephone , 702 270-7123 Tank Closure/Change-In-Service Company Service Company Saybr Contractors, Inc. Certified Supervisor Adam Inman Supervisor's Signature Address 3852 South 66th Stre' Decommissioning Certification No. 5044195-U2 Date 11/12/2010 Street Tacoma City WA. State P.O. Box 98409 Zip Code Telephone ( 253) 531-2144 Site Check/Site Assessor Certified Site Assessor Deitrie M. Hanson WA. State Site Assessor # 8012337-U7 Address 12034 134th Court NE Suite 102 Street Redmond City Tank ID Closure Date REG 9167 11/2/2010 NOL 17267 11/2/2010 SNL 8565 11/2/2010 WA. State P.O. Box 98052 Tank Information Closure Method Removal Removal Removal Zip Code Tank Capacity 12,000 12,000 12,000 Telephone (425) 298-1073 Substance Stored Unleaded Gas Unleaded Gas Unleaded Gas Contamination Present at the Time of Closure ® 0 ❑ Yes No Unknown Check unknown if no obvious contamination was observed and sample results have not yet been received from analytical lab. ® 0 Yes No If contamination is present, has the release been reported to the appropriate regional office? To receive this document in an alternative format, contact the Toxics Cleanup Program at 360-407-7170 (voice) or 1-800-833-6388 OR 711 (TTY) ECY 020-94 (Rev. 2-06) • f r1 r- Instructions Please Read Carefully This form is to be completed by the tank owner and submitted to Ecology within 30 days of tank closure. Mark the appropriate box(es) for temporary tank closure, permanent tank closure, change -in-service, or site assessment. AFTER COMPLETING THIS FORM. RETURN TO: TOXICS CLEANUP PROGRAM DEPARTMENT OF ECOLOGY P.O. BOX 47655 OLYMPIA, WA 98504-7655 Permanent Closure and Change -In -Service require a site assessment be performed. Site and Owner Information Fill in the site and owner information. Include the Ecology site number, if known; also, be sure to provide telephone numbers so that any problems can be resolved quickly. The tank owner MUST sign this form. Tank Closure/Change-In-Service Company and Site Check/Site Assessor List the closure company and fill in the site assessor information for permanent closure or change -in-service. Ask to see the closure company supervisor's ICC Certification and make sure that the certified supervisor signs this form. Please note: Individuals performing services MUST be certified by the International Code Council (ICC), or other nationally recognized association by which they demonstrate appropriate knowledge pertaining to USTs or have passed another qualifying exam approved by the Department. LJ Tank Information and Contamination Present at Time of Closure f -I LJ Please fill in the tank information requested using tank ID numbers previously reported to Ecology. In the column entitled "Closure Method," indicate what manner of closure was used, such as closure in place or removal. Check the appropriate box(es) indicating if contamination is present and has been reported. Contamination found or suspected at the site must be reported to the appropriate Ecology regional office within 24 hours [see below for telephone numbers]. If contamination is confirmed, a site characterization report must be submitted to the regional office within 90 days; if contamination is not confirmed, then this form, a site assessment checklist, and a site assessment report must be submitted to the above address within 30 days. r-. Central Eastern Southwest Northwest L J LJ r (509) 575-2490 (509) 329-3400 (360) 407-6300 (425) 649-7000 The following tanks are exempt from notification requirements: d• Farm or residential tanks, 1,100 gallons or less, used to store motor fuel for personal or farm use only. The fuel must not be for resale or used for business purposes. ❖ Tanks used for storing heating oil that is used on the premises where the tank is located. ❖ Tanks with a capacity of 110 gallons or less. ❖ Equipment or machinery tanks such as hydraulic lifts or electrical equipment tanks. ❖ Emergency overflow tanks, catch basins, or sumps. For more information, call toll free in the state of Washington 1-800-826-7716 (Message). • 0 UNDERGROUND STORAGE TANK Site Check/Site Assessment Checklist :ASYITOY STAT[ ECOLOGY OTLEOTG 6Y FOR OFFICE USE ONLY Site #: Facility Site ID #: INSTRUCTIONS When a release has not been confirmed and reported, this Site Check/Site Assessment Checklist must be completed and signed by a person certified by ICC or a Washington registered professional engineer who is competent, by means of examination, experience, or education, to perform site assessments. The results of the site check or site assessment must be included with this checklist. This form must be submitted to Ecology at the address shown below within 30 days after completion of the site check/site assessment. SITE INFORMATION: Include the Ecology site ID number if the tanks are registered with Ecology. This number may be found on the tank owner's invoice or tank permit. TANK INFORMATION: Please list all tanks for which the site check or site assessment is being conducted. Use the owner's tank ID numbers if available, and indicate tank capacity and substance stored. REASON FOR CONDUCTING SITE CHECK/SITE ASSESSMENT: Please check the appropriate item. CHECKLIST: Please initial each item in the appropriate box. SITE ASSESSOR INFORMATION: This information must be signed by the registered site assessor who is responsible for conducting the site check/site assessment. Underground Storage Tank Section Department of Ecology PO Box 47655 Olympia WA 98504-7655 SITE INFORMATION Site ID Number (Available from Ecology if the tanks are registered): 8603 Site/Business Name: 7 -Eleven Store #22866 Site Address: 14207 Pacific Highway South Street Tukwila City WA. State Telephone: (206) 241-1519 98168-4124 Zip Code TANK INFORMATION Tank ID No. REG (9167) NOL (17267) SNL (8565) Tank Capacity 12,000 12,000 12,000 Substance Stored Unleaded Gas Unleaded Gas Unleaded Gas REASON FOR CONDUCTING SITE CHECK/SITE ASSESSMENT Check one: Investigate suspected release due to on-site environmental contamination. Investigate suspected release due to off-site environmental contamination. Extend temporary closure of UST system for more than 12 months. UST system undergoing change -in-service. X UST system permanently closed with tank removed. Abandoned tank containing product. Required by Ecology or delegated agency for UST system closed before 12/22/88. Other (describe): ECY 010-158 (Rev. 2-06) • f1 LJ Li `I ri • 1`7 r1 w LJ 1 LJ l.J • 1 EZIailli Each item of the following checklist shall be initialed by the person registered with the Department of Ecology whose signature appears below. YES NO 1. The location of the UST site is shown on a vicinity map. X 2. A brief summary of information obtained during the site inspection is provided. (see Section 3.2 in site assessment guidance) X 3. A summary of UST system data is provided. (see Section 3.1.) X 4. The soils characteristics at the UST site are described. (see Section 5.2) X 5. Is there any apparent groundwater in the tank excavation? X 6. A brief description of the surrounding land use is provided. (see Section 3.1) X 7. Information has been provided indicating the number and types of samples collected, methods used to collect and analyze the samples, and the name and address of the laboratory used to perform the analyses. X 8. A sketch or sketches showing the following items is provided: - location and ID number for all field samples collected X - groundwater samples distinguished from soil samples (if applicable) X - samples collected from stockpiled excavated soil X - tank and piping locations and limits of excavation pit l X - adjacent structures and streets X - approximate locations of any on-site and nearby utilities X 9. If sampling procedures different from those specified in the guidance were used, has justification for using these alternative sampling procedures been provided? (see Section 3.4) X 10. A table is provided showing laboratory results for each sample collected including; sample ID number, constituents analyzed for and corresponding concentration, analytical method and detection limit for that method. X 11. Any factors that may have compromised the quality of the data or validity of the results are described. X 12. The results of this site check/site assessment indicate that a confirmed release of a regulated substance has occurred, X SITE ASSESSOR INFORMATION Deitrie M. Hanson WA. State Site Assessor # 8012337-U7 Person registered with Ecology Stantec Consulting Corporation Firm Affiliated with Business Address: 12034 134th Court NE Suite 102 Telephone: (425) 298-1073 Redmond Street Washington 98052 City State Zip Code I hereby certify that I have been in responsible charge of performing the site check/site assessment described above. Persons submitting false information are subject to penalties under Chapter 173.360 WAC. / -/Oruro Date Signa ure of Person Registered with Ecology If you need this publication in an alternate format, please contact Toxics Cleanup Program at (360) 407-7170. For persons with a speech or hearing impairment call 711 for relay service or 800-833-6388 for TTY. APPENDIX B WASTE MANIFEST, UST DISPOSAL DOCUMENTATION, AND SOIL DISPOSAL RECEIPTS Total Tonnage 329.35 7-11 Stantec Contaminated Soil Haul -Off Tally Load # I Truck Date!Dump Receipt) Time of Load Tonnage 1 LH #259 11/4/2010 203637 11:58 A.M. 37.69 1 2 CTI #259 11/4/2010 203640 1:22 P.M. 32.41 V 3 CTI #259 11/4/2010 203639 2:39 P.M. 32.51 ,/ 4 CTI #373 11/5/2010 203638 7:10 A.M. 35.37 / 5 CTI #374 11/5/2010 203646 7:40 A.M. 37.66 7 6 CTI #373 11/5/2010 203657 8:44 A.M. 30.18 / 7 CTI #374 11/5/2010 203653 9:05 A.M. 33.03 8 CTI #373 11/5/2010 203656 10:13 A.M. 27.19 9 CTI #374 11/5/2010 203654 10:35 A.M. 30.22 / 10 Cl'! #373 11/5/2010 203658 11:40 A.M. 33.09 ,/ Total Tonnage 329.35 VIE ' IMO (1E. rg KIR Erif ITCKL-T GRID VATIONUASTER DATE a+ litAf: tri DATE GUT TIME DLIT VEHICLE ROLL GEE REVERE:ACE man SAFETY MEMOS: 'lard hats MUST be worn. High Visibility vests MUST be worn, Passengers MUST remain in vehicle at all times S *WU URE PAT u 1P% IAN ToTAL 111=212111111 TENDERED CHECK HCE. OTV. tritt S;IL TICKET GIMO WEARMASTE11 OASE TIME tm DA' 'f 041 VEHICLE REFERENCE DESCOIPPOH SAFETY MEMOS: Hard hats MUST be worn. High Visibility vests MUST be worn. • Passengers MUST remain in vehicle at all times. 11M out ROLL OFF rAMt FrTENSIOtt TAX tOIAL SitINATLIRE mxnEO CHAPSOt CHECK HO SIF TICKET GAIv 'NEWHAM TER DATE* Ma /fit II CATEOLII i 11 C OUT s-- MEY61[LE NULL OFF NEFERQiCE Torttaati OESC3OPTIOi NATE SAFETY MEMOS: Hard hats MUST be worn High Visibility vests MUST be worn. • Passengers MUST remain in vehicle at all tames. ;il6NATE.FiE EXtENSiON 'MX TOTAL MANGE CHECK NO. A FETY MEMOS: Hard hats MUST be worn. High Visibility vests MUST be worn. [Passengers MUST remain in vehicle at all limes. VEICCLE nevEnecE ORIGIN RATE TOLE OUT f, ROLA. OFF -EXTERSION tAX VIAL CHA NUE CHECK NO 1-3ITE TICKET DATE IN DATE DUI ORM WEIGNAKASTER TIME. III i YENICTX REFERENCE DESCRIPTION 1 omali 1 TIM OUT IROLL OFF PAT E EXISITSION TA% I TOTAL - SAFETY MEMOS: Hard hats MUST be worn. High Visibility vests MUST be worn. • Passengers MUST remain in vehicle at all times, siGNATorIF TENUEFIEU ClIAND'E cmrcic NO UNIT VIE 711004 GRID 1 DATE IM DESERIPTIOM DATE Dirt VEHICLE WEIGIMEASTER MEIN TIME OirT REFEMEME noti OFF MATE _ EXTENSION TAX TOTAL SAFETY MEMOS: Hard hats MUST be worn, High Visibility vests MUST be worn. Passengers MUST remain in vehicle al all times. TEEIDEIMEi3 CHANGE CHECK hlt) rX. 'sru j WDOHMILSTES CATE Re I TIME IN RATE OUT HAN: OLIT VEHICLE REFLRENCE ROLL Of UESCRIPTION RATE EXIT/45104i TAX 0AFETY MEMOS: • Hard hats MUST be worn. High Visibility vests MUST be worn. • Passengers MUST remain in vehicle at all times. SIGNATURE . TOTAL !Il1110=211111 TENDERER CKAIIGE CHECK NO ic-Fr ! Gnus WEIGNilASTER OKI! rn TORE IN DATE OLIT TIDE aur VT Klett. ROU. OFF REFERENCE ORIGIN Carr UNIT OESOUPTI011 RAW Ex -11,4510N TOTAL SAFETY MEMOS: Hard hats MUST be worn, High Visibility vests MUST be worn. Passengers MUST remain in vehicle at all times. sq3t12./ljgr 04Ff AMOUNT TENDERED CHARGE CHECK NO. SITE TICKET DATE i14 OIND INE11 ISAASTER DATE OUT VEHICLE REFERENCE OTY UNIT DESCMPTION TN& RI TIME OUT ROLL OFF ORIGIN RATE SAFETY MEMOS: • Hard hats MUST be worn High Visibility vests MUST be worn. Passengers MUST remain in vehicle at all times. 5TGNATT10RE EITEHSION TAX TOTAL NET AMOUNT TENDERED CHAHOE CHECK NO. art I uNIT DESCRIPTION 'S11E J TIM T GRID VEiCa7fl ASTER DATE.1N tFlff RI • OAT Qif� 110.1E OUT • vEsicClE ROC:. OK - REFERENCE uKtG;to NATE EXTENSIOR SAFETY MEMOS: 'lard hats MUST be worn. High Visibility vests MUST be worn. Passengers MUST remain in vehicle at all limes. ,i,;,NATUTtE TOTAL Immo CHANGE Cs,ECIS NO. . J CONTRACTORS, INC. 3852 South 6611i St., Tacoma, WA 98409 Phone (253) 531-2144 • Fax (253) 536-2068 r ; Certificate of Underground Storage Tank Disposal r) J n r; J r1 UST Owner/Operator: 7 -Eleven Store 22866 Washington State Department of Licensing UBI Number: 578-070-490 Business ID Number: 001 Location ID: 0058 Washington State Department of Ecology Facility Site ID Number: 23544274 Washington State Department of Ecology UST Site Number: 8603 Site/Business Name: 7 -ELEVEN 2307-22866B (as listed with WADOE) Site Address: 14207 Pacific Hwy S Seattle, WA 98168 UST INFORMATION Tank Name Tank ID Closure Date Closure Method Tank Capacity Substance Stored Disposal Method NOL 17267 11/2/10 Removal 12,000 gallons Unleaded Gasoline Destruction SNL 8565 11/2/10 Removal 12,000 gallons Unleaded Gasoline Destruction REG 9167 11/2/10 Removal 12,000 gallons Unleaded Gasoline Destruction Certified UST Service Provider: Adam Inman Decommissioning Certificate No.: 5044195-U2 Signature: Date: 11/12/2010 r' This form certifies that Saybr Contractors, Inc. properly disposed of the above listed tank(s). L_! i_ J SAYBR CONTR{I;CTORS, INC. ,y Eric G. Martin Project Manager APPENDIX C MONITORING WELL PURGING AND SAMPLING PROCEDURES STANTEC MONITORING WELL PURGING AND SAMPLING PROCEDURES Monitoring well purging and sampling was conducted using U.S. Environmental Protection Agency (EPA) approved low -flow sampling techniques. Purging Procedures r A. Using a decontaminated instrument (i.e., tape measure, continuity meter, or interface probe) measure the depth to groundwater in reference to the measuring point at the top of the casing. Measure the total depth of the well to calculate the height and volume of water in the borehole. B. Based on previously obtained data, if a monitoring well is suspected of containing LPH concentrations, lower a transparent bailer into the well to evaluate the presence of a hydrocarbon sheen on the water `—' table. r C. Decontaminate the purge pump and/or PVC bailers by scrubbing in Alconox detergent solution, L, followed by a tap water rinse and then a deionized water rinse. r D. Purge, by low -flow pumping (less than 0.5 liters per minute) for approximately five minutes. If low -flow purging is not possible and bailing is used to purge the well, then a minimum of three well volumes will be removed. If the well goes dry, the procedure listed in step E2 (below) should be followed. Parameters should be measured after each 'A -casing volume is removed. E. Conduct field measurements (i.e., pH, specific conductivity, temperature, and oxidation-reduction potential) note clarity, color, turbidity, and odor of purge water, and measure depth to groundwater. 1 1. If the well has not been purged dry, continue to pump and conduct field measurements (including depth to water) again every five minutes during purging. r , a) If the first through third series of measurements vary by less than 10 percent, the well has been adequately purged. Allow the well to recover to 80 percent of its static condition and begin the sampling procedure. b) If the measurements vary by 10 percent or greater, repeat Step El above. c) If a minimum of three parameters cannot be measured during purging, remove three well volumes prior to sampling. 2. If the wells has been purged dry, measure the water level and allow the well to recharge to 80 percent, or for two hours, whichever occurs first. Calculate the percent recovery, and begin the sampling procedure. Sampling Procedures • Use the pump to collect the groundwater sample. n • Transfer the groundwater sample into the appropriate container(s). Where applicable, some containers are completely filled to achieve zero headspace. Label the samples according to location and date of collection. • Enter the samples into Chain -of -Custody and preserve on ice until delivery to the analytical laboratory. Complete the Well Development or Purging/Sampling Log to be stored in the project file. r- When requested by the client, collect a bailer rinse blank of deionized water to check decontamination procedure. In addition, trip blanks prepared by the laboratory and kept with the samples may be included to check for cross contamination of samples within the cooler. Additional and/or alternate QA/QC samples can be collected and analyzed upon client request. cJ APPENDIX D MONITORING AND SAMPLING FIELD DATA SHEETS Name(s) 0-1 Arrival Time: i 16V Departure Time: /cs 07) SITE VISITATIC :PORT 4Q10 - 7 -Eleven Service Stativ.. ,.o. 22866- Tukwila, WA Date: 10/29/10 Time of Arrival Call -In: Time of Departure Call -In Who did you call? Nib Paul Fairbairn WATER SOIL DRUM INVENTORY CARBON EMPTY TOTAL OPEN TOP TOTAL BUNG TOP HEALTH AND SAFETY ASSESSMENT P, p.. E DES 1PTION OF ACTIVITIES ONSITE AND NOTES ▪ 1 r -1 A._ r ' 1 LJ ▪ A ' r -0 - Stantec HYD LOGIC DATA SHEET star Gauge Date: Field TeChnician: 10/29/10 - ProjectName: ,,, Project Number: 7 -Eleven #22866 , r .2: 212302520 DTP ..• Depth to DTW A. Depth to DTB A. Depth to Flow through . Wells checked Free Product (FP or MPH) Billow TOC Groundwater Below TOC Bottom of Well Casing Below TOC cell calibrated YL N of bailing or purging the wells Y 1r N_ for product,ald gauged prior to commencement WELL OR LOCATION WELL SCREEN DEPTH PROPOSED INTAKE RANGE (feet below TOC) MEASUREMENTS PURGE? (Y!N) SHEEN? (Y/N) SAMPLE? (YIN) COMMENTS! PROBE CALIBRATION TIME DTP (feet) DTW (feet) DTB (feet) MW -1B i25 MW -1A 12 /7/5— — 9Z( 32fl, k , MW2A -.0 125 .0A) r MW -2B . /24/0 — 6 , fa 12,0 '' Al MW -4A *:-; , ( 2.:c.. MW -4B , : i 2.36 — 7 , 1 r Rks---4 ' /12/5 — . -Pii z/..,A1 Y 1-1 MW -3B '42,,i 6 - -2 5'.4_ i ,.7 6 y Y 1_MW-3A DPE-3 izzc - 71 I S , V 6 ' l'4 \11,,,/ , MW -5A 1 - Al -C- 1 \ , 4 MW -5B (45— — g.c6 ,4, I ,41 0 ik, .,t i • r. 1 -J r J t.J r! LJ r; I' L J f1 Li u u l J : Stantec WATER SAMPLE FIELD DATA SHEET awn Stantec PROJECT #: 2J Z. 02- 20 PURGED BY: 0 G % Z V CLIENT NAME: 7 -Eleven SAMPLED BY: ,.. C Z SAMPLEID::- ill Ldl - i LOCATION: 14207 Tukwila International BLVD/ HWY 99; Tukwila, WA b ` s_. DATE PURGED � START (2400hr) /Z.,5"C ' r DATE SAMPLED ?129/ ZV/e) SAMPLE TIME (2400hr) % 0 LOW -FLOW USED SAMPLE TYPE: Groundwater x Surface Water Treatment Effluent Other CASING DIAMETER: 2" X 4" 6" Casing Volume: (liters per foot) (0.16)) (0.6) (1.46) DEPTH TO BOTTOM (feet) = / V 5 D ' ACTUAL PURGE 4L)= 2., a- DEPTH TO WATER (feet) = WATER COLUMN HEIGHT (feet) = Z 2 ?5-'''' 1 FIELD MEASUREMENTS DATE TIME VOLUME TEMP. CONDUCTIVITY pH COLOR O.R.P. 19/400 (2400hr) 4L) (degrees C) (um/hos/cm) (units) (visual)/ ` t G 'i 1. 'l .�7� �rp jK3 Cier- /36 Sri %, C �r�.Z Calculated Variance of Final Three Samples: 4 D7 ,a• 0, ( V, J Acceptable Variance Limits: 5 10% <_ 3% 5 0.1 510% DEPTH TO PURGE INTAKE DURING PURGE: 13} 0) SAMPLE DTW: i(,.) QTY OF SAMPLE VESSELS & PRESERVATIVE: ANALYSES: 3 -HCL VOA'S PER WELL NWTPH-g BTEX-g PURGING EQUIPMENT: SAMPLING EQUIPMENT: Cole Parmer Environmental Sampler Model# 7175-00 YSI MPS 556 Flow Through Cell Disconnected Prior to Sample Collection?: YES j( NO WELL PAD CONDITION: --7,-;;;;-",-, WELL CASING CONDITION: rit, i WELL VAULT CONDITION:t�dlJ - SEAL PRESENT?: yeg BOLTS PRESENT?: ti __ WELL INTEGRITY: Y�c'aV.' WELL TAG: LOCK#: s/i'S r REMARKS: j SIGNATURE.�� Page f of r -• i; u t_.2 L r L. 1 r L LJ LJ Stantec WATER SAMPLE FIELD DATA SHEET M utvEn Stantec PROJECT CLIENT LOCATION: #: Z lZ, 36252 1) PURGED BY: Lid - NAME: 7 -Eleven SAMPLED BY: L'5 , SAMPLE I.D.: !I L ` 26 14207 Tukwila International BLVD! HWY 99; Tukwila, WA DATE DATE SAMPLE PURGED 1O/2 I230 START (2400hr) 1 62C - )C. SAMPLED 1O129/201)0 SAMPLE TIME (2400hr) (5tf t) LOW -FLOW USED TYPE: Groundwater x Surface Water Treatment Effluent Other CASING Casing DIAMETER: 2" X 4" 6" Volume: (liters per foot) (0.16) (0.6) (1.46) DEPTH DEPTH WATER TO BOTTOM (feet) = 1 % , ACTUAL PURGE 4L)= 2 = S TO WATER (feet) = (r, , COLUMN HEIGHT (feet) = t.5 , FIELD MEASUREMENTS DATE TIME VOLUME TEMP. CONDUCTIVITY pH COLOR O.R.P. *MO (2400hr) (AL) (degrees C) (umhos/cm) (units) (visual) l 3 3o Boo i b 6cc, i' 0,r—C°A r 3'1 j i L. S, S C — `7S / 3 36 S'v-D 67 2- .5-: s- e ..- 7./ i?Tq set) -7, 2 rj6 .s -:s- c4- .- f651 Calculated Variance of Final Three Samples: �i , /,Z 2 .10 -- -- Acceptable Variance Limits: <_ 10% 5 3% 5 0.1 510% DEPTH TO PURGE INTAKE DURING PURGE: / Q ,, ) SAMPLE DTW: 7 74/ QTY OF SAMPLE VESSELS & PRESERVATIVE: ANALYSES: 3 -HCL VOA'S PER WELL NWTPH-g BTEX-g PURGING EQUIPMENT: SAMPLING EQUIPMENT: Cole Parmer Environmental Sampler Model# 7175-00 YSI MPS 556 Flow Through Cell Disconnected Prior to Sample Collection?: YES X NO WELL WELL REMARKS: PAD CONDITION: J "q ;.sr- WELL CASING CONDITION: f,/ y VAULT CONDITION: Fii kit" SEAL PRESENT?: 6`S BOLTS PRESENT?: - 7 7j WELL INTEGRITY: Fitir WELL TAG: Loco: y�C - J f SIGNATURK.3,1"-5 Page iI of r 1 r f: L , 1 r1 u Stantecrwri WATER SAMPLE FIELD DATA SHEET awn PROJECT #�: Z IL5a25 2C) PURGED BY: it) ; 2 CLIENT NAME: 7 -Eleven SAMPLED BY: 9'„ P' SAMPLE I.D.: AC '— 415 LOCATION: 14207 Tukwila International BLVD/ HWY 99; Tukwila, WA DATE PURGED 1Q/1/200 START (2400hr) I' S 0 X DATE SAMPLED 10//200 SAMPLE TIME (2400hr) J L/ 0 LOW -FLOW USED SAMPLE TYPE: Groundwater x Surface Water Treatment Effluent Other CASING DIAMETER: 2" 4" x., 6" Casing Volume: (liters per foot) (0.16) (0.6) (1.46) DEPTH TO BOTTOM (feet) = / t ,t.c. 6 ACTUAL PURGE (4 = 2 , DEPTH TO WATER (feet) _ 7 1 I s ---- WATER COLUMN HEIGHT (feet) = WATER FIELD MEASUREMENTS DATE TIME VOLUME TEMP. CONDUCTIVITY pH COLOR O.R.P. 10/2/1/o (2400hr) L) (degrees C) (umhos/cm) (units) (visual)} /%�`� (i1l,9.`' —6 { �^ !��� lli ) ~L} ce�' J ��VY' (t' it ---'-'Mr-v --��� ~ ILjr,j saD i ci S_ r 4, / y5 /^''7_J t io2f '-i=i) �6 , -/ / t7 / :s, 5 r 4I id // e Calculated Variance of Final Three Samples: ©, 02____ !r 6 __ `� Acceptable Variance Limits: 5 10% /a 0.1 3` 5 10% DEPTH TO PURGE INTAKE DURING PURGE: I 2.4 era SAMPLE DTW: 7, L/ QTY OF SAMPLE VESSELS & PRESERVATIVE: ANALYSES: 3 -HCL VOA'S PER WELL NWTPH-g BTEX-g PURGING EQUIPMENT: SAMPLING EQUIPMENT: Cole Parmer Environmental Sampler Model# 7175-00 YSI MPS 556 Flow Through Cell Disconnected Prior to Sample Collection?: YES ,. NO WELL PAD CONDITION: piit WELL CASING CONDITION: / a WELL VAULT CONDITION: Ft d - SEAL PRESENT?: 7 Q5' BOLTS PRESENT?:/ WELL INTEGRITY: ;Jr WELL TAG: 1 e.- LOCK#: /OS - REMARKS: / SIGNATURE:4 � ,_,,,-e,-,-, 7 Page r of I J LJ . fl L 1 LJ �J r_t r-� LJ L J L .J 71 L� Stantec WATER SAMPLE FIELD DATA SHEET? Stantec PROJECT CLIENT LOCATION: _ „ .. #: 2-� 3052) PURGED BY: ... 3A NAME: 7 -Eleven SAMPLED BY: I , SAMPLE I,D.: } . 14207 Tukwila International BLVD/ HWY 99; Tukwila, WA DATE DATE SAMPLE PURGED 1Q14/20I a START (2400hr) 11/2O �/ /� SAMPLED V/29/2062 SAMPLE TIME (2400hr) 1 I_/5t LOW -FLOW USED TYPE: Groundwater x Surface Water Treatment Effluent Other CASING Casing DIAMETER: 2" )C 4" 6" Volume: (liters per foot) (0.16) (0.6) (1.46) DEPTH DEPTH WATER TO BOTTOM (feet) _ 3 L.1 ,. i 0 ACTUAL PURGE (CI:) = 2, • c TO WATER (feet) _ A , 44L/ COLUMN HEIGHT (feet) = 26 , d6 FIELD MEASUREMENTS DATE TIME VOLUME TEMP. CONDUCTIVITY pH COLOR O.R.P. 162 10 (2400hr) AL) (degrees C) (umhoslcm) (units) (visual) 4( 2--S`00 /6, 6q get 5': A 00.1k�; �,; f7� s i n ,e1 _;, '` t 01 iq t 4-13 y C' -b -z) r 7. T t, 5` , q - r I Z __ 2'/" /6 y _..,____-- •''°__-_ __--' ---L—„ Calculated Variance of Final Three Samples: 0.S 1,6 t✓'•, a Acceptable Variance Limits: <_ 10% -.,. <_ 3% _ 0.1 <_ 10% DEPTH TO PURGE INTAKE DURING PURGE: f , [D SAMPLE DTW: 8t z . QTY OF SAMPLE VESSELS & PRESERVATIVE: ANALYSES: 3 -HCL VOA'S PER WELL NWTPH-g BTEX-g PURGING EQUIPMENT: SAMPLING EQUIPMENT: Cole Parmer Environmental Sampler Model# 7175-00 YSI MPS 556 Flow Through Cell Disconnected Prior to Sample Collection?: YES . X NO WELL WELL REMARKS: PAD CONDITION: WELL CASING CONDITION: Fv-- ��•-a'' VAULT CONDITION: 1,-t,r-I-iiSEAL PRESENT?: 3'S BOLTS PRESENT?: WELL INTEGRITY: IF; WELL TAG: LOCK#:ye.-1 � G7i t k� 3"� � SIGNATURE'...„---,-..----���__ Page of r• [ -1 Li ri LJ u LJ n LJ LJ LJ 1 - Stantec ..., WATER SAMPLE FIELD DATA SHEET war Stantec PROJECT #: 2.12_367,5-24 PURGED BY: -, f ..4j _ Li) ` ->- CLIENT NAME: 7 -Eleven SAMPLED BY: f ! °' SAMPLE I.D.: t",nV` LOCATION: 14207 Tukwila International BLVD/ HWY 99; Tukwila, WA DATE PURGED 11/21/20 START (2400hr) / c/ ! 6 USED DATE SAMPLED 11/21200 SAMPLE TIME (2400hr) J L/ STS.-- LOW -FLOW SAMPLE TYPE: Groundwater xSurface Water Treatment Effluent Other CASING DIAMETER: 2" x 4" 6" Casing Volume: (liters per foot) (0.16) (0.6) (1,46) DEPTH TO BOTTOM (feet) = pi( 70 ACTUAL PURGE (V= 2•5- DEPTH TO WATER (feet) _ 7 , �� WATER COLUMN HEIGHT (feet) = 7 / FIELD MEASUREMENTS DATE TIME VOLUME TEMP. CONDUCTIVITY pH COLOR O.R.P. 110440 (2400hr) AL) (degrees C) (umhos/cm) (units) (visual) f4 1 c--rb, �9 $ 5-• LA.(' - 91 I co D 7 , 9S 3( -Lc -qz , .d.c- glii_zeL _Lc/A ____,.._____________________________ Calculated Variance of Final Three Samples: V r I ' 3,6 Acceptable Variance Limits: <_ 10% 5 3% 5 0.1 <_ 10% DEPTH TO PURGE INTAKE DURING PURGE: 1 I , dt) SAMPLE DTW: 7 r + q QTY OF SAMPLE VESSELS & PRESERVATIVE: ANALYSES: 3 -HCL VOA'S PER WELL NWTPH-g BTEX-g PURGING EQUIPMENT: SAMPLING EQUIPMENT: Cole Parmer Environmental Sampler Model# 7175-00 YSI MPS 556 Flow Through Cell Disconnected Prior to Sample Collection?: YES )(4., NO WELL PAD CONDITION: frd J'lf".' WELL CASING CONDITION: .ey ,r' WELL VAULT CONDITION: req, - SEAL PRESENT?: BOLTS PRESENT?: WELL INTEGRITY: ll , WELL TAG:e - LOCK#: 1r1 REMARKS: I Jj SIGNATURE: Page { of „,../7._,,,....____42,�" 1 ▪ J r' L 1 LJ r-, Fl f-1 LJ • J u 7-1 LJ • J L _J J c >;✓ StanteIV WATER SAMPLE FIELD DATA SHEET a Stantec PROJECT CLIENT LOCATION: _ #: 2 J Z 5- 62 c-2..-0 PURGED BY: b - , Z. " 3 NAME: 7 -Eleven SAMPLED BY: { , y I SAMPLE I.D.: DV 14207 Tukwila International BLVD/ HWY 99; Tukwila, WA DATE DATE SAMPLE PURGED 10!2j/200 START (2400hr) /5-612) USED X SAMPLED 10/24/200 SAMPLE TIME (2400hr) TIC LOW -FLOW TYPE: Groundwater x Surface Water Treatment Effluent Other CASING Casing DIAMETER: 2" 4" 6" Volume: (liters per foot) (0.16) (0.6) (1.46) DEPTH DEPTH WATER TO BOTTOM (feet) = / f) „ '-1 j} ACTUAL PURGE IL) = 2... , 5'-- TO WATER (feet) = 7. % 9 COLUMN HEIGHT (feet) = /D i 5-! FIELD MEASUREMENTS DATE TIME VOLUME TEMP. CONDUCTIVITY pH COLOR 10/24/10 (2400hr) (Op (degrees C) (umhos/cm) (units) (visual O.R.P. isrc- aD /6 , I5 /6, t0 t ( - q 3 i c. --o 9, cri, /6, . i Co /0 �s " " $ (I 1 S— 4-0 � �� (3 5.9 6., 14c IL/ s --$i) /6 . 7/ f2 C., -9 t\!c . 2.. �c=� . Calculated Variance of Final Three Samples: n /6 Z D. 2 � Acceptable Variance Limits: 5 10% 5 3% <_ 0.1 x°10% DEPTH TO PURGE INTAKE DURING PURGE: /5`. al) SAMPLE DTW: g I.S - i QTY OF SAMPLE VESSELS & PRESERVATIVE: ANALYSES: 3 -HCL VOA'S PER WELL NWTPH-g BTEX-g PURGING EQUIPMENT: SAMPLING EQUIPMENT: Cole Parmer Environmental Sampler Model# 7175-00 YSI MPS 556 Flow Through Cell Disconnected Prior to Sample Collection?: YES q<, NO WELL WELL REMARKS: PAD CONDITION: p,4 x, -..t-- WELL CASING CONDITION: .04 VAULT CONDITION: 6 SEAL PRESENT?: BOLTS PRESENT?: t/,3 " / WELL INTEGRITY: 1j -r-- WELL TAG: y - LOCK#: j SIGNATURE( /"] _� ,,.,r.-�:-rt Page ( of SAMPLE CH OF CUSTODY Send Report Address, SAMPLERS (signature PROJECT NAME/NO. REMARKS Page # of TURNAROUND TIME XStandard (2 Weeks) Rush charges authorized by SAMPLE DISPOSAL ispose after 30 days 0 Return samples 0 Will call with. instructions Friedman & Bruya, Inc. 3012.%16th Avenue West Seattle, WA 98119-2029 Ph. (206) 285-8282 Fax (206) 283-5044 FoRMs\coc\coc_Doc SIGNATURE ,., ANALYSES REQUESTED ; COMPANY Sample ID --• . ,^n^': Lab IDSampled Date Time Sampled Sample Type # of containers TPH-Diesel TPH-Gasoline BTEX by 80218 VOCs by8260 SVOCS by 8270 Notes Relinyius ed by: Received by: Friedman & Bruya, Inc. 3012.%16th Avenue West Seattle, WA 98119-2029 Ph. (206) 285-8282 Fax (206) 283-5044 FoRMs\coc\coc_Doc SIGNATURE ,., PRINT NAME ; COMPANY DATE TIME Relinquishe by Relinyius ed by: Received by: APPENDIX E LABORATORY REPORT AND CHAIN -OF - CUSTODY DOCUMENTATION r r: FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS James E. Bruya, Ph.D. Charlene Morrow, M.S. Yelena Aravkina, M.S. Bradley T. Benson, B.S. Kurt Johnson, B.S. November 3, 2010 Paul Fairbairn, Project Manager Stantec 12034 134th Ct NE Suite 102 Redmond, WA 98052 Dear Mr. Fairbairn: 3012 16th Avenue West Seattle, WA 98119-2029 TEL: (206) 285-8282 FAX: (206) 283-5044 e-mail: fbi@isomedia.com Included are the results from the testing of material submitted on October 28, 2010 from the 22866 Tukwila UST Removal 212302520 Task 210.0403, F&BI 010322 project. There are 7 pages included in this report. Any samples that may remain are currently scheduled for disposal in 30 days. If you would like us to return your samples or arrange for long term storage at our offices, please contact us as soon as possible. We appreciate this opportunity to be of service to you and hope you will call if you should have any questions. Sincerely, FRIEDMAN & BRUYA, INC. Michael Erdahl Project Manager Enclosures ST1v 1.143R.DOC FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS CASE NARRATIVE This case narrative encompasses samples received on October 28, 2010 by Friedman & Bruya, Inc. from the Stantec 22866 Tukwila UST Removal 212302520 Task 210.0403, F&BI 010322 project. Samples were logged in under the laboratory ID's listed below. Laboratory ID Stantec 010322-01 SP -1 All quality control requirements were acceptable. 1 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/03/10 Date Received: 10/28/10 Project: 22866 Tukwila UST Removal 212302520 Task 210.0403, F&BI 010322 Date Extracted: 10/28/10 Date Analyzed: 10/28/10 RESULTS FROM THE ANALYSIS OF SOIL SAMPLES FOR TOTAL PETROLEUM HYDROCARBONS AS GASOLINE USING METHOD NWTPH-Gx Results Reported on a Dry Weight Basis Results Reported as mg/kg (ppm) Sample ID Laboratory ID SP -1 010322-01 Method Blank 00-1747 MB F) Gasoline Range 3.3 <2 Surrogate (% Recovery) (Limit 50-150) 95 112 r r r-, r� n n FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SP -1 10/28/10 10/28/10 10/28/10 Soil mg/kg (ppm) Surrogates: 1,2-Dichloroethane-d4 Toluene -d8 4-B romoflu.orob enz ene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 103 97 95 Concentration mg/kg (ppm) 0.19 <0.05 <0.05 <0.1 <0.05 Client: Stantec Project: 22866 Tukwila UST Removal 212302520 Lab ID: 010322-01 Data File: 102753.D Instrument: GCMS5 Operator: VM Lower Upper Limit: Limit: 42 152 36 149 50 150 3 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Method Blank Not Applicable 10/27/10 10/28/10 Soil mg/kg (ppm) Surrogates: 1, 2-Dichloroethane-d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 106 101 100 Concentration mg/kg (ppm) <0.03 <0.05 <0.05 <0.1 <0.05 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 4 Stantec 22866 Tukwila UST Removal 212302520 001705 mb2 102748.D GCMS5 YM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/03/10 Date Received: 10/28/10 Project: 22866 Tukwila UST Removal 212302520 Task 210.0403, F&BI 010322 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES FOR TPH AS GASOLINE USING METHOD NWTPH-Gx Laboratory Code: 010314-04 (Duplicate) (Wet Wt) (Wet Wt) Relative Percent Reporting Sample Duplicate Difference Anal to Units Result Result (Limit 20) Gasoline mg/kg (ppm) <2 Laboratory Code: Laboratory Control Sample <2 Percent Reporting Spike Recovery Acceptance Analyte Units Level LCS Criteria Gasoline mg/kg (ppm) 20 90 71-131 5 nm FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/03/10 Date Received: 10/28/10 Project: 22866 Tukwila UST Removal 212302520 Task 210.0403, F&BI 010322 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES FOR VOLATILES BY EPA METHOD 8260C Laboratory Code: Laboratory Control Sample Percent Percent Reporting Spike Recovery Recovery Acceptance RPD Analyte Units Level LCS LCSD Criteria (Limit 20 Benzene mg/kg (ppm) 2.5 86 87 69-122 1 Toluene mg/kg (ppm) 2.5 90 93 72.122 3 Ethylbenzene mg/kg (ppm) 2.5 93 94 72.130 1 m,p-Xylene mg/kg (ppm) 5 92 94 72.131 2 o -Xylene mg/kg (ppm) 2.5 95 98 71-129 3 6 ru lord FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Data Qualifiers & Definitions a - The analyte was detected at a level less than five times the reporting limit. The RPD results may not provide reliable information on the variability of the analysis. Al — More than one compound of similar molecule structure was identified with equal probability. b • The analyte was spiked at a level that was less than five times that present in the sample. Matrix spike recoveries may not be meaningful. ca - The calibration results for this range fell outside of acceptance criteria, The value reported is an estimate. c - The presence of the analyte indicated may be due to carryover from previous sample injections. pa, d - The sample was diluted. Detection limits may be raised due to dilution. Lr' ds - The sample was diluted. Detection limits are raised due to dilution and surrogate recoveries may not be meaningful. dv - Insufficient sample was available to achieve normal reporting limits and limits are raised accordingly. fb - Analyte present in the blank and the sample. fc — The compound is a common laboratory and field contaminant. wirg hr - The sample and duplicate were reextracted and reanalyzed. RPD results were still outside of control limits. The variability is attributed to sample inhomogeneity. ht - Analysis performed outside the method or client -specified holding time requirement. ip - Recovery fell outside of normal control limits. Compounds in the sample matrix interfered with the quantitation of the analyte. j — The result is below normal reporting limits. The value reported is an estimate. J - The internal standard associated with the analyte is out of control limits. The reported concentration is an estimate. i..+ jl - The analyte result in the laboratory control sample is out of control limits. The reported concentration should be considered an estimate. jr - The rpd result in laboratory control sample associated with the analyte is out of control limits. The reported concentration should be consideredanestimate. r.l bs - The surrogate associated with the analyte is out of control limits. The reported concentration should e considered an estimate. lc - The presence of the compound indicated is likely due to laboratory contamination. L - The reported concentration was generated from a library search. nm - The analyte was not detected in one or more of the duplicate analyses. Therefore, calculation of the RPD is not applicable. pc — The sample was received in a container not approved by the method. The value reported should be considered an estimate. pr - The sample was received with incorrect preservation. The value reported should be considered an estimate. ve - Estimated concentration calculated for an analyte response above the valid instrument calibration range. A dilution is required to obtain an accurate quantification of the analyte. vo - The value reported fell outside the control limits established for this analyte. x - The sample chromatographic pattern does not resemble the fuel standard used for quantitation. 7 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS 900"Doa\DO3\SIATHO4 eggg-g8? (900 'Yd. • z z TPH,Diesel BTEX by -8621B V06, by 8260 FcrOes, by 8276 FOES z. +.4 ..Or• V?, Q 0 w ! tc, • 7, '• • , . rJ • 1:"E° ;7:7; t•-• tc• >. tri t eF1 6'251 .6.; 9 • _„.. ".51 t2J 1.4 James E. Bruya, Ph.D. LrCharlene Morrow, M.S. Yelena Aravkina, M.S. Bradley T. Benson, B.S. Kurt Johnson, B.S. November 19, 2010 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS IMO Paul Fairbairn, Project Manager 6'' Stantec 12034 134th Ct NE, Suite 102 Redmond, WA 98052 Dear Mr. Fairbairn: 3012 16th Avenue West Seattle, WA 98119-2029 TEL: (206) 285-8282 FAX: (206) 283-5044 e-mail: fbi@isomedia.com Included are the results from the testing of material submitted on November 3, 2010 from the 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 project. There are 25 pages included in this report. Any samples that may remain are currently scheduled for disposal in 30 days. If you would like us to return your samples or arrange for long term storage at our offices, please contact us as soon as possible. We appreciate this opportunity to be of service to you and hope you will call if you should have any questions. Sincerely, FRIEDMAN & BRUYA, INC. Michael Erdahl Project Manager Enclosures STN111.9R.DOC load lumal II YEN pra V FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS CASE NARRATIVE This case narrative encompasses samples received on November 3, 2010 by Friedman & Bruya, Inc. from the Stantec 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 project. Samples were logged in under the laboratory ID's listed below. Laboratory ID Stantec 011040-01 SP -2 011040-02 SP -3 011040-03 SP -4 011040-04 SP -5 011040-05 SS -1@12' 011040-06 BT -1 011040-07 SS -2@.12' 011040-08 DP -1@2' 011040-09 PL -1@2' 011040-10 DP -2@2' 011040-11 SS -3@12' 011040-12 SS -4@12' 011040-13 PL -2@2' All quality control requirements were acceptable. I Mug FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/19/10 Date Received: 11/03/10 Project: 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 Date Extracted: 11/03/10 Date Analyzed: 11/03/10 and 11/04/10 RESULTS FROM THE ANALYSIS OF SOIL SAMPLES FOR TOTAL PETROLEUM HYDROCARBONS AS GASOLINE USING METHOD NWTPH-Gx Results Reported on a Dry Weight Basis Results Reported as mg/kg (ppm) Sample ID Gasoline Range Laboratory ID SP -2 16 011040-01 SP -3 5,000 011040-02 1/50 Surrogate (% Recovery) (Limit 58-139) 116 SP -4 12 89 011040-03 SP -5 17 103 011040-04 SS -1@12' 4.1 95 011040-05 SS -2@12' 4,400 ip 011040-07 1/50 DP -1@2' 8.3 109 011040-08 PL -1@2' 66 110 011040-09 DP -2@2' 9.4 105 011040-10 SS -3@12' 6.2 94 011040-11 SS -4@12' 260 ip 01.1040-1.2 1/10 ri r r FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/19/10 Date Received: 11/03/10 Project: 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 Date Extracted: 11/03/10 Date Analyzed: 11/03/10 and 11/04/10 RESULTS FROM THE ANALYSIS OF SOIL SAMPLES FOR TOTAL PETROLEUM HYDROCARBONS AS GASOLINE USING METHOD NWTPH-Gx Results Reported on a Dry Weight Basis Results Reported as mg/kg (ppm) Sample ID Laboratory ID PL -2@2' 011040-13 Gasoline Range 17 Surrogate (% Recovery) (Limit 58-139) 118 Method Blank <2 91 00-1755 MB FRIEDMAN & BRUYA, INC. PIR ENVIRONMENTAL CHEMISTS 1114 Date of Report: 11/19/10 '-r Date Received: 11/03/10 Project: 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 Date Extracted: 11/04/10 Date Analyzed: 11/04/10 RESULTS FROM THE ANALYSIS OF WATER SAMPLES FOR TOTAL PETROLEUM HYDROCARBONS AS GASOLINE USING METHOD NWTPH-Gx Results Reported as ug/L (ppb) Sample ID Laboratory ID BT -1 011040-06 Gasoline Range 1,100 Surrogate (% Recovery) (Limit 51-134) 84 Method Blank <100 71 00-1815 MB 4 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SP -2 11/03/10 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1, 2-Dichloroethane -d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 102 105 100 Concentration mg/kg (ppm) 1.2 0.94 0.81 4.7 1.6 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-01 110408.D GCMS5 VM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SP -3 11/03/10 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1, 2-Dichloroethane - d 4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 93 100 105 Concentration mg/kg (ppm) 1.9 1.9 19 ve 62 ve 36 ve Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-02 110411.D GCMS5 \TM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SP -3 11/03/10 11/03/10 11/05/10 Soil mg/kg (ppm) Surrogates: 1,2-Dichloroethane-d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 114 122 118 Concentration mg/kg (ppm) <3 <5 40 170 52 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-02 1/100 110447.D GCMS5 \TM Upper Limit: 152 149 150 Pri hod keg PR FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SP -4 11/03/10 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1, 2- Dichloroethane - d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 98 105 98 Concentration mg/kg (ppm) 0.86 0.16 0.083 0.23 <0.05 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-03 110409.D GCMS5 VM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SP -5 11/03/10 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1, 2-Dichloroethane -d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 104 107 99 Concentration mg/kg (ppm) 2.7 0.29 0.23 0.48 0.060 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-04 110410.D GCMS5 VM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SS -1@12' 11/03/10 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1, 2- Dichloroe thane - d 4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 107 107 102 Concentration mg/kg (ppm) 0.095 <0.05 0.15 0.36 0.062 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-05 110420.D GCMS5 VM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SS -2@12' 11/03/10 11/03/10 11/05/10 Soil mg/kg (ppm) Surrogates: 1, 2- Dichloroethan e - d 4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 113 118 118 Concentration mg/kg (ppm) <0,3 <0.5 32 86 1.8 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-07 1/10 110449.D GCMS5 \TM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: DP -1@2' 11/03/10 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1,2-Dichloroethane-d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m.,p-Xylene o -Xylene % Recovery: 107 108 101 Concentration mg/kg (ppm) <0.03 <0.05 <0.05 0.10 0.057 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-08 110421.D GCMS5 ITM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: PL -1@2' 11/03/10 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1, 2- Dichloroethane - d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 105 109 101 Concentration mg/kg (ppm) 0.37 2.5 0.98 4.0 1.6 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-09 110422.D GCMS5 ' M Upper Limit: 152 149 150 FWAI Wag a rig ,.r rig FIR tow FR PR woo 1114 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: DP -2@2' 11/03/10 11/03/10 11/05/10 Soil mg'/kg (ppm) Surrogates: 1, 2-Dichloroethane -d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 107 108 99 Concentration mg/kg (ppm) <0.03 <0.05 <0.05 <0.1 <0.05 Client: Project: Lab ID: Data File: Instrument: Operator: 14 Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-10 110432.D GCMS5 VM Upper Limit: 152 149 150 I rr FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SS -3@12' 11/03/10 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1, 2-Dichloroethane -d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 107 109 102 Concentration mg/kg (ppm) 0.25 0.078 <0.05 <0.1 <0.05 Client: Project: Lab ID: Data File: Instrument: Operator: 15 Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-11 110430.D. GCMS5 VM Upper Limit: 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: SS -4@12' 11/03/10 11/03/10 11/05/10 Soi.1 mg/kg (ppm) Surrogates: 1,2-Dichloroethane -d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 102 107 108 Concentration mg/kg (ppm) 0.23 <0.05 0.84 1.8 0.19 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-12 110431.D GCMS5 VM Upper Limit. 152 149 150 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: PL -2@2' 11/03/10 11/03/10 11/05/10 Soil mg/kg (ppm) Surrogates: 1, 2-Dichloroethane -d4 Toluene -d8 4- Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene V % Recovery: 109 109 101 Concentration mg/kg (ppm) 0.41 <0.05 0.11 0.17 <0.05 Client: Project: Lab ID: Data File: Instrument: Operator: 17 Lower Limit: 42 36 50 Stantec 22866 Tukwila 011040-13 110431A.D GCMS5 VM Upper Limit: 152 149 150 lame PIAbri FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Method Blank Not Applicable 11/03/10 11/04/10 Soil mg/kg (ppm) Surrogates: 1, 2-Dichloroethane - d4 Toluene -d8 4- Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 103 104 98 Concentration mg/kg (ppm) <0.03 <0.05 <0.05 <0.1 <0.05 18 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 42 36 50 Stantec 22866 Tukwila 001767 mb 110407.D GCMS5 VM Upper Limit: 152 149 150 frq Immo FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: BT -1 Date Received: 11/03/10 Date Extracted: 11/03/10 Date Analyzed: 11/03/10 Matrix: Water Units: ug/L (ppb) Surrogates: 1, 2-Dichloroethane -d4 Toluene -d8 4- Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 102 102 97 Concentration ug/L (ppb) 74 160 ve 25 97 49 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 63 65 69 19 Stantec 22866 Tukwila 011040-06 110316.D GCMS5 VM Upper Limit: 127 127 127 rig Y�1 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Volatile Compounds By EPA Method 8260C Client Sample ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Method Blank Not Applicable 11/10/10 11/10/10 Water ug/L (ppb) Surrogates: 1, 2-Dichloroethane -d4 Toluene -d8 4-Bromofluorobenzene Compounds: Benzene Toluene Ethylbenzene m,p-Xylene o -Xylene % Recovery: 104 99 98 Concentration ug/L (ppb) <0.35 <1 <1 <2 <1 20 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 63 65 69 Stantec 22866 Tukwila 001780 mb 111011.D GCMS5 \TM Upper Limit: 127 127 127 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/19/10 Date Received: 11/03/10 Project: 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES FOR TPH AS GASOLINE USING METHOD NWTPH-Gx Laboratory Code: 011025-08 (Duplicate) (Wet Wt) (Wet Wt) Relative Percent Reporting Sample Duplicate Difference Analyte Units Result Result (Limit 20) Gasoline mg/kg (ppm) <2 <2 nm Laboratory Code: Laboratory Control Sample Percent Reporting Spike Recovery Acceptance Analyte Units Level LCS Criteria Gasoline mg/kg (ppm) 20 85 61-153 21 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/19/10 Date Received: 11/03/10 Project: 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF WATER SAMPLES TPH AS GASOLINE USING METHOD NWTPH-Gx Laboratory Code: 009202-05 (Duplicate) Relative Percent Reporting Sample Duplicate Difference Analyte Units Result Result (Limit 20) Gasoline ug/L (ppb) 210 210 0 Laboratory Code: Laboratory Control Sample Percent Reporting Spike Recovery Acceptance Analyte Units Level LCS Criteria Gasoline ug/L (ppb) 1,000 98 69-134 22 1 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS FP Date of Report: 11/19/10 6.1 Date Received: 11/03/10 Project: 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF SOIL SAMPLES FOR VOLATILES BY EPA METHOD 8260C Laboratory Code: 011040-10 (Matrix Spike) Percent FP Reporting Spike Sample Recovery Acceptance " Analyte Units Level Result MS Criteria Benzene mg/kg (ppm) 2.5 <0.03 50 39-136 Toluene mg/kg (ppm) 2.5 <0.05 58 38-139 Ethylbenzene mg/kg (ppm) 2.5 <0.05 65 46-135 m,p-Xylene mg/kg (ppm) 5 <0.1 65 45-135 o -Xylene mg/kg (ppm) 2.5 <0.05 66 44-137 71 Laboratory Code: Laboratory Control Sample 7 Percent Percent i..r Reporting Spike Recovery Recovery Acceptance RPD Analyte Units Level LCS LCSD Criteria (Limit 20) Benzene mg/kg (ppm) 2.5 81 85 69-122 5 Toluene mg/kg (ppm) 2.5 87 89 72-122 2 `r Ethylbenzene mg/kg (ppm) 2.5 91 93 72-130 2 m,p-Xylene mg/kg (ppm) 5 92 93 72-131 1 L o -Xylene mg/kg (ppm) 2.5 94 95 71-129 1 r.r v Fil 23 i.r FRIEDMAN & BRUYA, INC. fiP ENVIRONMENTAL CHEMISTS Date of Report: 11/19/10 Date Received: 11/03/10 Project: 22866 Tukwila UST Removal 212302520.210.0403, F&BI 011040 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF WATER SAMPLES FOR VOLATILES BY EPA METHOD 8260C tin - Laboratory Code: Laboratory Control Sample Percent Percent 1 Reporting Spike Recovery Recovery Acceptance RPD L Analyte Units Level LCS LCSD Criteria (Limit 20) Benzene ug/L (ppb) 50 101 100 77-121 1 7 Toluene ug/I (ppb) 50 101 99 81-113 2 Ethylbenzene ug/L (ppb) 50 100 97 83-116 3 1.1 m,p-Xylene ug/L (ppb) 100 104 101 84-120 3 o -Xylene ug/L (ppb) 50 112 111 83-120 1 L. FRIEDMAN & BRUYA, INC. Lis ENVIRONMENTAL CHEMISTS Data Qualifiers & Definitions a - The analyte was detected at a level less than five times the reporting limit. The RPD results may not provide reliable information on the variability of the analysis. Al — More than one compound of similar molecule structure was identified with equal probability. bThe analyte was spiked at a level that was less than five times that present in the sample. Matrix spike recoveries may not be meaningful. ca - The calibration results for this range fell outside of acceptance criteria. The value reported is an ? estimate. c - The presence of the analyte indicated may be due to carryover from previous sample injections. d - The sample was diluted. Detection limits may be raised due to dilution. ds - The sample was diluted. Detection limits are raised due to dilution and surrogate recoveries may not be meaningful. dv - Insufficient sample was available to achieve normal reporting limits and limits are raised `'r accordingly. fb - Analyte present in the blank and the sample. fc — The compound is a common laboratory and field contaminant. hr - The sample and duplicate were reextracted and reanalyzed. RPD results were still outside of control limits. The variability is attributed to sample inhomogeneity. ht - Analysis performed outside the method or client -specified holding time requirement. ip - Recovery fell outside of normal control limits. Compounds in the sample matrix interfered with the quantitation of the analyte. j — The result is below normal reporting limits. The value reported is an estimate. J - The internal standard associated with the analyte is out of control limits. The reported concentration is an estimate. Poi jl - The analyte result in the laboratory control sample is out of control limits. The reported concentration should be considered an estimate. T- The rpd result in laboratory control sample associated with the analyte is out of control limits. he reported concentration should be considered an estimate. js - The surrogate associated with the analyte is out of control limits. The reported concentration should be considered an estimate. lc - The presence of the compound indicated is likely due to laboratory contamination. L - The reported concentration was generated from a library search. nm - The analyte was not detected in one or more of the duplicate analyses. Therefore, calculation of the RPD is not applicable. pc — The sample was received in a container not approved by the method. The value reported should be considered an estimate. pr — The sample was received with incorrect preservation. The value reported should be considered an estimate. ve - Estimated concentration calculated for an analyte response above the valid instrument calibration range. A dilution is required to obtain an accurate quantification of the analyte. vo - The value reported fell outside the control limits established for this analyte. x - The sample chromatographic pattern does not resemble the fuel standard used for quantitation. 25 SAMPLE CHAIN OF CUSTODY _ /'i 6 « (73 Send Report To 'PAUL FUJR5,9JRW Company S1WJ1 EC enizU 7?N6 comp:11 J Address 12034 -134Th COURT NE STE 10Z City, State, ZIP I?EDMOND/ WA 178052. Phone # 025) 208 IDI6Fax # 0125) 298-1019 SAMPLERS (signature) PROJECT NAME/NO. 4-22%6TcckuMC(AUSTeen701 iQ ai a34:Yao, a-10,0403 PO # REMARKS tSP-2,5P-3 5P-4,SP-S, on 2* hrRu,4tttiouvloundfime.,Stun TTftn,55- Aura 1 Page # TURNAROUND TIME tandard 2 Weeks ZUSH a ttfiaur RiahhulCtrwZrized by: SAMPLE DISPOSAL Dispose after 30 days 0 Return samples 0 Will call with instructions Friedman & Bruya, Inc. 3012 16th Avenue West Seattle, WA 98119-2029 Ph. (206) 285-8282 Fax (206) 283-5044 FORMS\COC\COC.DOC SIGNATURE ANALYSES REQUESTED Sample ID Lab ID Date Sampled Time Sampled Sample Type # of containers 1 A x ° x H BTEX by 8021B l VOCs by 8260 1 SVOCs by 8270 1 m w x a g I s. Relinquished .y: ei/----- N 1 t ' Notes GP -2- W.F. "12/10 4000 Son, .- 5 / ?I1>=8pev% SP -3• 'E gi H j2. 0 1 O' 5 SOIL- 5 P100- • GP -1+ 41-6-2 101310 soil- 5 ► 111)0. SP-5 _ . A`` ' 2/10 1320 sort- 5 ► PI D=2 56--1 l2' a az a 2 l0 1030 Sot- m 1 I T-1 'I/2Jlo 1Co25 WRIER 5 I ► aftit4,44 5's-2@ i2_ .11 3110 0825 Son- 5 P solo M DP -1@Z' °. II 3110 i10 0 2S0 SOLL PICa.apPm PL -1@2` to!► ,. 11/3/10 NIS SOIL 5 1 Vil)=-61-0fpoi_ DP 2@2j r --11 . 131Io 0 a3o so= L 5 . ► pi p-_qOh, i Friedman & Bruya, Inc. 3012 16th Avenue West Seattle, WA 98119-2029 Ph. (206) 285-8282 Fax (206) 283-5044 FORMS\COC\COC.DOC SIGNATURE DATE Relinquished by, /,; ; , n - y QPRIN TyN AMEU DCII 11 1e Hanso lel c . CyO jM /P+ANY c [ ct tt c. "Wit) TIFME 1 i -✓- Received by: i I ;,44.,,,4_,,cka, / s. Relinquished .y: ei/----- N 1 t ' if/_ Samples rat— .—AC Received/b/7 i_) [.1 IL] a.I 1 1 t 1 [ 1 L- l 1] 1 1 11_1 %1 1_1 1.. 1 L 1 1_1 IL 1 [_ ; OM Via SAMPLE CHAIN OF CUSTODY Send Report To PAUL, ffl1KMRN Company S17!NTEC CONSUJ.T]NGCORPOP4TTk I' Address /2034131ith eOURT NL SUIT foZ ME 1/- PROJECT NAME/NO. #22866 TWavikLeaream4 M.0250 2620 2/O.040.3 PO # City, State, ZIP REDMOND W/1 Q805 ' ,Sp 2, SP -3, sf-�f sr- , $T-1 on Phone # 025)298-1016 Fax # (W021840/5' itut 1 ! Bn� titi771t7 i s5 1k/Z' SS 2@12iSS_2€12,sa- fZ, 1?P'PL 03 - 10542/ Page Page #of V, TURNAROUND TIME MUSH Ruha�t ger a authorized by: LWAJ SAMPLE DISPOSAL Dispose after 30 days ❑ Return samples 0 Will call with instructions Friedman & Bruya, Inc. 3012 16th Avenue West Seattle, WA 98119-2029 Ph. (206) 285-8282 Fax (206) 283-5044 FORMS\COC\COC.DOC SIGNATURE PRINT NAME COMPANY DATE ANALYSES REQUESTED TttilefiQXtsan sample ID Lte IDab SDaampled Time Sampled sampleType Pe contai# of nera x i E BTEX by 8021B 1 VOCs by 8260 1 SVOCs by 8270 1 x ;34( AI n at.td F -C et._._ " F 113lip ! cf 0 d Notes SS -3@12' 14,5 liblio [-.0i . 'LL 5 PIPz83.2pri SS -1-1-@121 -�i3Iio 1015 .SOIL .5PID-4V Rt., PL -12@ 2`,e 11/3/10 1145 SOILSa4e PcM °C. i a& Friedman & Bruya, Inc. 3012 16th Avenue West Seattle, WA 98119-2029 Ph. (206) 285-8282 Fax (206) 283-5044 FORMS\COC\COC.DOC SIGNATURE PRINT NAME COMPANY DATE TIME Relinquished by:14; 000074....., TttilefiQXtsan !Oho 1255 Received by: po iL.4___L u1,. 1-6-4 "z_Ll.r , "l A.1~-s,0C a 1 1 t Relinquish ' . y: Receiv by AI n at.td F -C et._._ " F 113lip ! cf 0 d i__1 _, a _ 1 i_ I ._ I ILA ILA L_ ] 1_1 ILA ILA [_A 1_1 I_l I_ 1 Yowl FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS James E. Bruya, Ph.D. Charlene Morrow, M.S. Yelena Aravkina, M.S. Bradley T. Benson, B.S. Kurt Johnson, B.S. November 12, 2010 Paul Fairbairn, Project Manager Stantec 12034 134th Ct NE, Suite 102 Redmond, WA 98052 Dear Mr. Fairbairn: 3012 16th Avenue West Seattle, WA 98119-2029 TEL: (206) 285-8282 FAX: (206) 283-5044 e-mail: fbi@isomedia.com Included are the results from the testing of material submitted on October 29, 2010 from the 22866 4th Qtr GWM/212302520.210.0410, F&BI 010368 project. There are 14 pages included in this report. Any samples that may remain are currently scheduled for disposal in 30 days. If you would like us to return your samples or arrange for long term storage at our offices, please contact us as soon as possible. We appreciate this opportunity to be of service to you and hope you will call if you should have any questions. Sincerely, FRIEDMAN & BRUYA, INC. Michael Erdahl Project Manager Enclosures STN1112R.DOC FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS CASE NARRATIVE This case narrative encompasses samples received on October 29, 2010 by Friedman & Bruya, Inc. from the Stantec 22866 4th Qtr GWM/212302520.210.0410, F&BI 010368 project. Samples were logged in under the laboratory ID's listed below. Laboratory ID Stantec 010356-01 MW -1B 010356-02 MW -2B 010356-03 MW -4B 010356-04 MW -3A 010356-05 MW -3B 010356-06 DPE-3 All quality control requirements were acceptable. 1 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/12/10 Date Received: 10/29/10 Project: 22866 4th Qtr GWM/212302520.210.0410, F&BI 010368 Date Extracted: 11/01/10, 11/04/10, and 11/05/10 Date Analyzed: 11/02/10, 11/04/10, and 11/05/10 RESULTS FROM THE ANALYSIS OF WATER SAMPLES FOR BENZENE, TOLUENE, ETHYLBENZENE, XYLENES AND TPH AS GASOLINE USING EPA METHOD 8021B AND NWTPH-Gx Results Reported as ug/L (ppb) Ethyl Total Gasoline Surrogate Sample ID Benzene Toluene Benzene Xylenes Range (% Recovery) Laboratory ID(L'i mit 52-124) MW -1B 15 2.6 <1 <3 190 86 010368-01 MW -2B 720 29 17 43 2,500 82 010368-02 1/10 MW -4B 1.9 13 <1 20 120 82 010368-03 MW -3A <1 <1 <1 <3 <100 80 010368-04 MW -3B 1.3 1.7 1.0 <3 260 90 010368-05 DPE-3 <1 <1 <1 <3 <100 82 010368-06 Method Blank 00-1753 MB <1 <1 <1 <3 <100 88 2 FREEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Dissolved Metals By EPA Method 200.8 Client ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Internal Standard: Holmium Analyte: Lead MW -1B 10/29/10 11/04/10 11/04/10 Water ug/L (ppb) % Recovery: 95 Concentration ug/L (ppb) <1 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 60 Stantec 22866 4th Qtr GVW 010368-01 010368-01.013 ICPMS1 AP Upper Limit: 125 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Dissolved Metals By EPA Method 200.8 Client ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Internal Standard: Holmium Analyte: Lead MW -2B 10/29/10 11/04/10 11/04/10 Water ug/L (ppb) % Recovery: 95 Concentration ug/L (ppb) <1 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 60 Stantec 22866 4th Qtr GWM 010368-02 010368-02.014 ICPMS1 AP Upper Limit: 125 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Dissolved Metals By EPA Method 200.8 Client ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Internal Standard: Holmium Analyte: Lead MW -4B 10/29/10 11/04/10 11/04/10 Water ug/L (ppb) % Recovery: 92 Concentration ug/L (ppb) <1 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 60 Stantec 22866 4th Qtr GWM 010368-03 010368-03.015 ICPMS1 AP Upper Limit: 125 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Dissolved Metals By EPA Method 200.8 Client ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Internal Standard: Holmium Analyte: Lead Method Blank NA 11/04/10 11/04/10 Water ug/L (ppb) % Recovery: 103 Concentration ug/L (ppb) <1 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 60 Stantec 22866 4th Qtr GWM I0-630. mb I0-630 mb.008 ICPMS1 AP Upper Limit: 125 C FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Total Metals By EPA Method 200.8 Client ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Internal Standard: Holmium Analyte: MW -1B 10/29/10 11/02/10 11/03/10 Water ug/L (ppb) % Recovery: 90 Concentration ug/L (ppb) Lead <1 6.17C 7 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 60 Stantec 22866 4th Qtr GWM 010368-01 010368-01.044 ICPMS1 AP Upper Limit: 125 L n 61 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Total Metals By EPA Method 200.8 Client ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Internal Standard: Holmium Analyte: Lead MW -2B 10/29/10 11/02/10 11/03/10 Water ug/L (ppb) % Recovery: 93 Concentration ug/L (ppb) <1 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit: 60 Stantec 22866 4th Qtr GWM 010368-02 010368-02.048 ICPMS1 AP Upper Limit: 125 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Total Metals By EPA Method 200.8 Client ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Internal Standard: Holmium Analyte: Lead MW -4B 10/29/10 11/02/10 11/03/10 Water ug/L (ppb) % Recovery: 90 Concentration ug/L (ppb) <1 Client: Project: Lab ID: Data File: Instrument: Operator: Lower Limit. 60 Stantec 22866 4th Qtr GWM 010368-03 010368-03.049 ICPMS1 AP Upper Limit: 125 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Analysis For Total Metals By EPA Method 200.8 Client ID: Date Received: Date Extracted: Date Analyzed: Matrix: Units: Internal Standard: Holmium Analyte: Lead PA Method Blank NA 11/02/10 11/03/10 Water ug/L (ppb) % Recovery: 93 Concentration ug/L (ppb) <1 Client: Project: Lab ID: Data File: Instrument: Operator: 10 Lower Limit: 60 Stantec 22866 4th Qtr GWM I0-626 mb I0-626 mb.042 ICPMS1 AP Upper Limit: 125 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/12/10 Date Received: 10/29/10 Project: 22866 4th Qtr GWM/212302520.210.0410, F&BI 010368 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF WATER SAMPLES FOR BENZENE, TOLUENE, ETHYLBENZENE, XYLENES, AND TPH AS GASOLINE USING EPA METHOD 8021B AND NWTPH-Gx Laboratory Code: 010368-02 (Duplicate) Analyte Benzene Toluene Ethylbenzene Xylenes Gasoline Laboratory Code: Analyte Reporting Sample Duplicate Units Result Result ug/L (ppb) 260 270 ug/L (ppb) 32 33 ug/L (ppb) 15 15 ug/L (ppb) 43 43 ug/L (ppb) 1,300 1,300 Laboratory Control Sample Percent Reporting Spike Recovery Units Level LCS Benzene Toluene Ethylbenzene Xylenes Gasoline ug/L (ppb) 50 94 ug/L (ppb) 50 91 ug/L (ppb) 50 94 ug/L (ppb) 150 96 ug/L (ppb) 1,000 97 11 Relative Percent Difference (Limit 20) Acceptance Criteria 65-118 72-122 73-126 74-118 69-134 1 4 0 0 1 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: :11/12/10 Date Received: 10/29/10 Project: 22866 4th Qtr GWM/212302520.210.0410, F&BI 010368 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF WATER SAMPLES FOR DISSOLVED METALS USING EPA METHOD 200.8 Laboratory Code: 011042-01 Reporting Analyte Units Lead ug/L (ppb) (Matrix Spike) Spike Sample Level Result 10 <1 Percent Percent Recovery Recovery MS MSD 104 105 Laboratory Code: Laboratory Control Sample Percent Reporting Spike Recovery Analyte Units Level LCS Lead ug/L (ppb) 10 101 12 Acceptance Criteria 67-135 Acceptance RPD Criteria (Limit 20) 76-125 1 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Date of Report: 11/12/10 Date Received: 10/29/10 Project: 22866 4th Qtr GWM/212302520.210.0410, F&BI 010368 QUALITY ASSURANCE RESULTS FOR THE ANALYSIS OF WATER SAMPLES FOR TOTAL METALS USING EPA METHOD 200.8 Laboratory Code: 010368-01 (Matrix Spike) Analyte Lead Reporting Units ug/L (ppb) Laboratory Code: Laboratory Analyte Lead Reporting Units ug/L (ppb) Percent Percent Spike Sample Recovery Recovery Level Result MS MSD 10 <1 109 107 Control Sample Percent Spike Recovery Level LCS 10 106 13 Acceptance Criteria 67-135 Acceptance Criteria 76-125 RPD (Limit 20) 2 FRIEDMAN & BRUYA, INC. ENVIRONMENTAL CHEMISTS Data Qualifiers & Definitions a - The analyte was detected at a level less than five times the reporting limit. The RPD results may not provide reliable information on the variability of the analysis. Al — More than one compound of similar molecule structure was identified with equal probability. bThe analyte was spiked at a level that was less than five times that present in the sample. Matrix spike recoveries may not be meaningful. ca - The calibration results for this range fell outside of acceptance criteria. The value reported is an estimate. c - The presence of the analyte indicated may be due to carryover from previous sample injections. d - The sample was diluted. Detection limits may be raised due to dilution. ds - The sample was diluted. Detection limits are raised due to dilution and surrogate recoveries may not be meaningful. dv - Insufficient sample was available to achieve normal reporting limits and limits are raised accordingly. fb - Analyte present in the blank and the sample. fc — The compound is a common laboratory and field contaminant. hr - The sample and duplicate were reextracted and reanalyzed. RPD results were still outside of control limits. The variability is attributed to sample inhomogeneity. ht - Analysis performed outside the method or client -specified holding time requirement. ip - Recovery fell outside of normal control limits. Compounds in the sample matrix interfered with the quantitation of the analyte. j — The result is below normal reporting limits. The value reported is an estimate. J - The internal standard associated with the analyte is out of control limits. The reported concentration is an estimate. jl - The analyte result in the laboratory control sample is out of control limits. The reported concentration should be considered an estimate. Tr - The rpd result in laboratory control sample associated with the analyte is out of control limits. he reported concentration should be considered an estimate. js - The surrogate associated with the analyte is out of control limits. The reported concentration should be considered an estimate. lc - The presence of the compound indicated is likely due to laboratory contamination. L - The reported concentration was generated from a library search. nm - The analyte was not detected in one or more of the duplicate analyses. Therefore, calculation of the RPD is not applicable. pc — The sample was received in a container not approved by the method. The value reported should be considered an estimate. pr — The sample was received with incorrect preservation. The value reported should be considered an estimate. ve - Estimated concentration calculated for an analyte response above the valid instrument calibration range. A dilution is required to obtain an accurate quantification of the analyte. vo - The value reported fell outside the control limits established for this analyte. x - The sample chromatographic pattern does not resemble the fuel standard used for quantitation. 14