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WELL CONONTRATIONS • <br /> Shell-branded Service Station <br /> 4315 Waterloo Road <br /> Stockton, CA <br /> MTBE MTBE Depth to Depth to GW SPH [7Reading <br /> Wel) ID Date TPPH TEPH B T E X 8020 8260 TOC Water SPH Elevation Thickness u IL u IL u /L u u IL u IL u IL u IL MSL ft ft MSL ft <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 8260B, prior to July 23, 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 8260B, prior to July 23, 2001, analyzed 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 /> 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 /> NA= Not applicable <br /> Notes <br /> a=TOC elevation altered during wellhead maintenance <br /> Site surveyed December 20,2001, by Virgil Chavez Land Surveying of Vallejo,Calrfomfa <br /> Page 3 <br />