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I0 5 4 Encountered Lithologies Lithologies encountered while drilling remediation wells VEAS-1 through VEAS-3, monitor wells MW - 13 through MW -17, and groundwater extraction well EX -1 predominately consisted of silty sand, silty clay and poorly graded sand Appendix C contains Method of Soil Classification, VEAS-1 through VEAS-3, and EX -1 boring logs, and the Non -Hazardous Waste Manifest for the transportation of the soil generated from the December 2002 drilling event 5 5 Analytical Testing Analyses of soil and groundwater samples was performed by ZymaX Envirotechnology (ZymaX), a State - certified laboratory Quality Assurance and Quality Control (QA/QC) procedures, sample preservation, apparatus required, and analyses performed will be per 1) A A C R9-14-601 through -617, 2) U S EPA Document EPA -600, "Methods for Chemical Analysis for Water and Wastes" dated July 1982, and 3) U S EPA document SW -846, 3rd Edition, "Test Methods for Evaluating Solid Waste Physical Chemical Methods", dated November 1986 Select soil and groundwater samples were analyzed for total petroleum hydrocarbons characterized as gasoLne (rPHg), ben7,me, tcl�lene, ethylberzcrie, tc*al- xylenes (BTFX), mcth; l-te•- r;I c+er (MTBE), tert-amyl methyl ether (TAME), tert-butyl alcohol (TBA), di -isopropyl ether (DIPE), and ethyl- tert-butyl ether (ETBE) in accordance with Environmental Protection Agency (EPA) Test Method 8260B All groundwater samples were additionally analyzed for 1,2-dichlorethane (1,2 -DCA), and ethylene dibromide (EDB) (1,2-Dibromoethane)in accordance with EPA Test Method 8260B 5.6 Soil Sample Analytical Results During the additional site characterization assessment activities, which took place on December 9 through 16, 2002, sixty (60) soil samples were submitted to ZymaX for analytical testing Twenty-five of the soil samples submitted for laboratory analysis were reported to contain one or more petroleum hydrocarbon constituent concentrations above their respective laboratory equipment practical quantitation Iimits (PQLs) A summary of soil sample analytical results from this phase of site assessment is provided in Table 5, Additional Site Assessment, Groundwater Monitor and Remediation Wells, Soil Sample Analytical Results — Petroleum Hydrocarbons and Fuel Oxygenates The distribution of selected constituent concentrations are shown on Figure 8, Geologic Cross -Sections A -A' and B -B' TPHg was detected above the laboratory PQLs which ranged from 0 5 to 10 milligrams per kilogram (mglkg, equivalent to parts per million) in seventeen (17) soil samples at concentrations ranging from 16 mg/kg in soil sample MW -14130' to 2,800 mglkg in soil sample EX -1/40' Benzene was detected above the laboratory PQLs which ranged from 0 005 to 1 0 mg/kg in seventeen (17) soil samples at concentrations ranging from 0 014 mg/kg in soil sample YEAS -3/60' to 3 5 mg/kg in soil sample EX -1/40' Toluene was detected above the laboratory PQLs, which ranged from 0 005 to 0 1 EZ 100966 CAP S IEZ Serve\EZ 1009661Reports1100966CAP 7 ATC Associates Inc ATC Project No 43 25827 0026 4