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I <br /> WELL CONCENTRATIONS <br /> Former Texaco Service Station <br /> 1440 W. Charter Way <br /> Stockton, CA <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water Elevation Thickness <br /> u IL u IL u IL I' (ug/L (ug/L uIL (ug/L u IL MSL ft MSL ft <br /> II If <br /> VEW-41) 02/20/2002 NA NA NA II NA [[ NA NANA NA 9 42 NA NA NA <br /> II [[ <br /> VEW-4S 02/20/2002 NA NA NA II NA [[ NA NA NA NA 9 41 NA NA NA <br /> I <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA'Method 8260B, pnor to May 17, 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 826�0B,prior to May 17,2001, analyzed by EPA Method 8020 <br /> i <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 /> NA=Not applicable <br />` ND=Not detected at or above the minimum quantitation limit <br /> Notes <br /> a= Result reported was generated out of hold time <br /> s <br /> b=Well not sampled due to lack of access agreement <br /> Site surveyed(except MW-8)on February 20,2002, by Virgil Chavez Land Surveying of Vallejo,California <br /> i <br /> I <br /> I _ � <br /> I � P28 <br />