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'WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 2575 Country Club <br /> Stockton, CA <br /> 1Wic #204-7524-3505 <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 (U9/Q (ug/1 u /L)( (u/L (u/L (u/L MSL ft MSL ft <br /> I II II <br /> Warman Pier 01/28/2000 NA I NA NA NA NA NA NA 1390 11 181 1 272 NA <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified FPA 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 /> 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 /> Notes <br /> a = Depth to ground water measurement and reference elevation datum is top of boot(adapted for vapor extraction)at well head <br /> Warman Pier well elevation referenced from iSurvey Marker <br /> Port= Indicates ground water sample collected at the well head sampling port <br /> Down= Indicates ground water sample colleicted inside the well with a bailer <br /> b=Not sampled due to insufficient water capacity on the truck <br /> c= Result reported was generated out of hold time <br /> Page 16 <br />