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� t <br /> WELL CONC`tNTRATIONS ' <br /> Shell-branded Service Station <br /> 4445 North-Pershing Avenue <br /> Stockton, CA <br /> Wic #204-7524-2408 <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation Thickness <br /> u IL (ug/L .(u/L u IL u IL u IL u Il MSL ft. MSL ft. <br /> Abbreviations: <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> STEX= benzene,toluene, ethylbenzene,xylenes 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 /> ug/L=parts per billion <br /> msl = Mean sea level <br /> ft= Feet <br /> <n = Below detection limit <br /> D= Duplicate sample <br /> NA= Not applicable <br /> Page 9 <br /> ._ - - - <br />