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I <br /> 1 WELL CONCENTRATIONS � <br /> Shell-branded Service Station <br /> J �r 6131 Pacific Avenue <br /> I Stockton, CA <br /> MTBE MTB Depth to GW SP <br /> Well ID Date TPPH B T E X 8020 8260` DIPE ETBE TAME TBA Ethanol Methanol 1,21DCA EDB <br /> l TOC Water Elevation Thickness <br /> u /L u IL u IL u /L u !L u !L u /L u lL u 1L u IL L L MSL ft <br /> MSL ft <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608,pnor to May 11 20�i,analyzed by EPA Method 8015 <br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015 E <br /> BTEX=Benzene,toluene ethylbenzens,xylenes by EPA Method 8260B,prior to May i11,2001 analyzed by EPA Method 8020 <br /> MTBE=Methyl tertiary butyl ether <br /> DIPE=Di-isopropyl ether analyzed by EPA Method 82608 <br /> ETBE=Ethyl tertiary butyl ether,analyzed by EP? Method 82608 <br /> TAME=Tertiary amyl methyl`ether,analyzed by EPA Method 62608 <br /> TBA=Tertiary butyl alcohol,analyzed by EPA Method 82608 {, <br /> 1 2-DCA=1,2-Dichloroethane analyzed by EPA Method 62608 <br /> EDB=Ethylene dibromide,analyzed by EPA Method 8260B f - <br /> TOC=Top of Casing Elevation 1 li j <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater � <br /> ug1L=Parts per billion <br /> MSL=Mean Sea Level �� t <br /> R =Feet <br /> <n=Below detection limit i <br /> NA=Not Applicable <br /> 1I <br /> 1� k <br /> , <br /> a <br /> II <br /> f <br /> 1�; I <br /> I , <br /> I <br /> , <br /> Page 13 <br />