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HYDROGEOLOCIC 1NVFIMGA'17ON <br /> Evwn Company,U.S.A. <br /> Retail Store 7-3708 <br /> 2705 Country Club Boulevard <br /> Stockton,California <br /> Delta Project No.40-91-838 <br /> Page 5 <br /> TABLE 2 <br /> w <br /> Ground Water Level Measurements <br /> Monitoring Depth to Grour d. Reference Ground Water <br /> t t Well Date Water ft Elevationf(tla Elevation ft <br /> �. MW-1 0823191 1639 1.95 -14.44 <br /> i <br /> 0829/91 16.49 -14.54 <br /> MW-2 08f'3191 16.59 2.09 -14.49 <br /> 08/29191 16.69 -14.60 <br /> ,.y MW-3 0823191 15.15 0.52 -14.63 <br /> 0829191 15.25 -14.74 <br /> " 'Reference points at the top of the well risers were surveyed relative co California Department of Transportation Benchmark <br /> t. #16181.,elevation =O.T2.8 feet above mean sea level. <br /> r^ <br /> 3.3 Soil Sample Analytical Results <br /> " Soil samples collected from each baring at a depth of 10 Feet below grade were selected for chemical analysis <br /> based on PID readings and the depth to ground water. The samples were analyzed for concentrations of <br /> a.: <br /> BTEX and TPH as gasoline by EPA Methods 8015 and 8020. Ground water analytical results are <br /> summarized on Table 3 and copies of the certified laboratory reports ate included in Appendix E. <br /> TABLE 3 <br /> Soil Sample Analytical Results <br /> August 23, 1991 <br /> Concentrations lit Parts per Million (ppb) <br /> Sample TPHa <br /> Location De tit ft Benzene Toluene Ethvlhenzene Xvlenes asSasp soline <br /> MW-1 !0 <h0 <1.0 <I.0 <1.0 <200 <br /> MW-2 10 <1.0 <1.0 <1.0 <1.0 <200 <br /> r• MW-3 10 <1.0 <1.0 <1.0 <1.0 <200 <br /> 'Total petroleum hydrocarbons. <br /> RPT003.BP <br />