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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 4315 Waterloo Road <br /> Stockton, CA <br /> MTBE MTBE Depth to Depth to GW SPH DO <br /> LollID Date TPPH TEPH B T E X 8020 8260 TOC Water SPH Elevation Thickness Reading <br /> u /L u !L u 1 u 1L u /I I hu A hinliI /finILI IRASL ft ft MSL ft m <br /> MW-3 07/31/2002 <50 NA <0 50 <0 50 <0 50 <0 50 NA <0 50 2990 6579 NA -3589 NA NA <br /> MW-3 110111/20021 <50 1 NA <0 50 <0 50 <0 50 1 <0 50 NA <5 0 2990 6824 NA -3834 NA E=NA <br /> I <br /> MW-4 11/14/2001 NA NA NA NA NA NA NA NA 3162 6537 NA -3375 NA NA <br /> MW4 11116/2001 89 NA <0 50 <0 50 <0 50 32 NA <0 50 3162 6180 NA -3018 NA NA <br /> MW-4 01/23/2002 <50 NA <0 50 <0 50 <0 50 <0 50 NA 056 3162 6244 NA -3082 NA NA <br /> MW-4 04118/20021. <50 NA <0 50 <0 50 <0 50 1 <0 50 NA 083 3162 6139 NA -2977 NA NA <br /> MW-4 07/31/2002 <50 NA <0 50 <0 50 <0 50 <0 50 NA <0 50 3162 6758 j NA -3596 NA NA <br /> MW-4 10/71/2002 <50 NA <0 50 <0 50 <0 50 I <0 50 NA <5 0 31 62 6997 NA -3835 NA NA <br /> Abbreviations <br /> TPPH =Total petroleum hydrocarbons as gasoline by EPA Method 8260B, prior to July 23,2001, analyzed by EPA Method 8015 <br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX= Benzene,toluene, ethylbenzene, xylenes by EPA Method 8260B,prior to July 23,2001, analyzed by EPA Method 8020 <br /> MTBE=Methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> DO=Dissolved Oxygen <br /> ug/L=Parts per billion <br /> ppm=Parts per million <br /> MSL=Mean sea level <br /> ft=Feet <br /> <n=Below detection limit <br /> NA=Not applicable <br /> 0 P4 2 <br />