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i <br /> WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 620 West Charter Way <br /> Stockton, CA <br /> MTBE MTBE Depth to GW SPH DO <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Thickness Reading <br /> u /L (ug/L (u/L (u/L u IL (u/L (u/L MSL ft MSL ft m <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608, prior to November 21,2000,analyzed by EPA Method 8015,except where noted <br /> BTEX=Benzene,toluene, ethyibenzene,xylenes by EPA Method 82608,prior to November 21,2000, analyzed by EPA Method 8020,except where noted <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 /> D=Duplicate sample <br /> NA=Not applicable <br /> nln=Pre-purge/Post-purge <br /> I <br /> I <br /> I <br /> I <br /> P22 <br /> I <br />