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1 <br /> II <br /> WELL CONCENTRATIONS <br /> Shell branded Service Station <br /> 14315 Waterloo Road + <br /> Stockton, California <br /> 1� MTBE MTBE Depth toI Depth to GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water SPH Elevation Thickness Reading <br /> (ug/L (ug/L u IL (ug/L u [IL (ug/L uIL u IL MSL ft ft MSL ft m <br /> II � <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Methodi8260B, pnor to July 23,2001, analyzed by EPA Method 8015 <br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Metho6 8015 'I <br /> BTEX= Benzene,toluene,ethylbenzene,xylenes by EPA Method 82606, pnolr to July 23, 2001,analyzed by EPA Method 8020 <br /> MTBE= Methyl-tertiary-butyl ether k <br /> TOC=Tap of Casing Elevation f <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater �l <br /> DO=Dissolved Oxygen h <br /> ug/L=Parts per billion ' <br /> ppm= Parts per million I <br /> msl=Mean sea level ; <br /> ft=Feet - <br /> <n=Below detection limit it <br /> NA= Not applicable <br /> Notes <br /> Site surveyed December 20,2001, by Virgil Chavez Land Surveying of Vallelol, California <br /> 1 � - <br /> r <br /> If <br /> jl <br /> ' � I P 2 � • � I <br /> If <br />