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T&E 1 <br /> WELL CONCENTRATIONS <br /> Shell Oil Products Company <br /> 141 N. El Dorado Street <br /> Stockton, California <br /> WIC#204-7524-1509 <br /> Sample Measured Corrected SP TPPH B T E X I MTBE dO j dO ! Comments <br /> Date GW Depth (ft) GW Elev (ft) (ft) (uglL) (uglL) (ug/Q (ug/L) (uglL) I (uglL) (mg/L) i Method I <br /> VEW-2 ! Top casing elevation (ft) I I i I + <br /> 05-Sep-96 NA NA I NA i NA NA NA NA i NA i NA NA NA Well dry <br /> 25-Oct-96 I NA i NA I NA NA NA NA NA NA NA E NA NA Well dry <br /> VEW-3 ! Top casing elevation (ft) <br /> 05-Sep-96 2391 NA 000 <50 <0 50 <0 50 <0 50 i <0 50 j NA* NA NA MTBE by 6260 4 0 ppb <br /> 25-Oct-96 I 2438 NA I 000 I <50 I <0 50 <0 50 I <0 50 <0 50 i NA* i 42 YSI Meter MTBE by 8260 2 5 ppb <br /> VEW-4 I Top casing elevation (ft) I I <br /> 05-Sep-96 ! 2327 NA 000 <50 <0 50 <0 50 <0 50 <0 50 <2 5 NA NA <br /> 25-Qct-96 2378 NA 000 <50 <0 50 <0 50 <0 50 I <0 50 <2 5 47 j YSI Meterj <br /> Abbreviations <br /> NA=Not analyzed or not available <br /> <x= Not detected at detection limit of x <br /> (DUP)= Duplicate sample <br /> i <br /> TPPH =Total Purgeable Petroleum Hydrocarbons carbon range C6 to C12 by EPA Method 8015 (Modified) <br /> (previously reported as Total Petroleum Hydrocarbons as Gasoline) <br /> BTEX=benzene,toluene, ethylbenzene, and xylenes by EPA Method 8020 <br /> MTBE= methyl-tertiary-butyl ether by EPA Method 8020 <br /> SP= Separate Phase hydrocarbon <br /> d0=dissolved Oxygen <br /> Notes <br /> * = MTBE could not be determined due to coelution with t-1,2-DCE <br /> 96369 7 <br />