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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 2575 Country Club <br /> Stockton, CA <br /> Wic #204-7524-3505 <br /> Depth to GW SPH <br /> Well ID Date TPPH B TE X MTBE 8020 MTBE 8260 TOC Water Elevation Thickness <br /> u /L u /L u /L u /L u /L u /L u /L) (MSL) ft MSL ft <br /> 1[ II <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> BTEX=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 /> ug1L=parts per billion <br /> msl=Mean sea level <br /> ft W Feet <br /> <n=Below detection limit <br /> D=Duplicate sample <br /> Notes i <br /> a=Depth to ground water measurement and reference elevation datum is top of boot(adapted for vapor ext(action)at well head <br /> Warman Pier well elevation referenced from Survey Marker <br /> Port=Indicates ground water sample collected at the well head sampling port <br /> Down=Indicates ground water sample collected inside the well with a bailer�� <br /> b=Not sampled due to insufficient water capacity on the truck <br /> Page 11 <br />