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Table 5 <br /> Historical Soil Analytical Data Compared to San Francisco Bay Regional Water Quality Control Board Environmental Screening Levels <br /> ARCO Service Staton 2130 <br /> 7906 North EI Dorado Street <br /> Stockton, California <br /> Sample TPH as TPH as <br /> Sample Depth Date Gasoline Diesel Benzene Toluene Ethylbenzene Xylenes MtBE Lead <br /> Name (feet) Sampled (mglkg) (mg/kg) (mglkg) (mg/kg) (mg/kg ) (mg/kg) (mg/kg) (mg/kg) <br /> Monitoring Wells <br /> MW-1 (B-2) 41 December-91 <1 .0 NA <0.005 <0.005 <0.005 0.039 NA NA <br /> 46 December-91 <1 .0 NA 0.073 <0.005 <0.005 0.0084 NA NA <br /> 61 December-91 6 NA 0.41 0.41 0.048 0.28 NA <5.0 <br /> MW-2 (B-6) 36 December-91 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> 46 December-91 <1 .0 NA 0.049 <0.005 <0.005 0.03 NA <5.0 - f <br /> 61 December-91 <1 .0 NA 0.039 <0.005 0.0061 0.023 NA NA <br /> MW-3 (13-6) 41 December-91 <1 .0 NA 0.043 0.029 <0.005 0.058 NA NA <br /> 61 December-91 <1 .0 NA <0.005 <0.005 <0.005 0.005 NA NA <br /> MW-4 (B-9) 36.5 August-92 <1 .0 NA 0.0075 <0.005 <0.005 <0.005 NA NA <br /> 51 .5 August-92 <1 .0 NA 0.048 0.036 <0.005 0.019 NA NA <br /> 61 .5 August-92 <1 .0 NA 0.14 0.011 <0.005 0.043 NA NA <br /> MW-5 (B-16) 16.5 August-92 <1 .0 NA 0.0064 0.014 <0.005 0.062 NA NA <br /> 36.5 August-92 0.86 NA 0.17 <0.005 <0.005 0.15 NA NA <br /> 61 .5 August-92 98 NA 3.4 5.9 2.5 11 NA NA <br /> MVV-6 (B-21 ) 40.5 November-92 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> 55 November-92 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> 60 November-92 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> MW-7 (B-22) 35.5 November-92 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> 60.5 November-92 <1 .0 NA <0.005 <0.005 <0.005 x0.005 NA NA <br /> 65.5 November-92 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA 'd <br /> MW-8 (B-23) 56.5 November-93 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> 66.5 November-93 0 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> MW-9 (B-24) 56.5 November-93 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> 66.5 November-93 <1 .0 NA <0.005 <0.005 <0.005 <0.005 NA NA <br /> MW-11 20.0 7/6/06 <0.20 1 .6` <0.010 <0.010 <0.010 <0.010 <0.010 NA <br /> 35.0 7/6/06 <0.20 1 .4' <0.010 <0.010 <0.010 <0.010 <0.010 NA <br /> 50.0 7/6/06 <0.20 2.2' <0.010 <0.010 <0.010 <0.010 <0.010 NA <br /> MW-12 20.0 7/6/06 <0.20 1 .0` <0.010 <0.010 <0.010 <0.010 <0.010 NA <br /> 35.0 7/6/06 <0.20 1 .3* <0.010 <0.010 <0.010 <0.010 <0.010 NA <br /> 50.0 7/6/06 <0.20 1 .5• <0.010 (0.010 <0.010 <0.010 <0.010 NA <br /> 2130 Arco Historical soil-ESL comparison Page 2 of 4 SECOR <br />