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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 1267 Country Club <br /> Stockton,CA <br /> MTBE j MTBE Depth td GW <br /> Well toI Data TPPH I TEPH B T E X $020 $no TSA OIPE ETRE TAME EDB 7,z-0cA Ethanol Methanol TOC Myfater Elevation <br /> u L u u I <br /> u u u u u >! u u MSL fl SL <br /> Abbre"ons <br /> TPPH=TaW petrdeum hydrocarbons es gasdine by EPA Method 8280B prtorto January29 2001 analyzed by EPA Method 8015 <br /> TEPH-Total pdrdeum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX=Benzene,toluene WrAbarzene,xylenes by EPA Method 82608 prior to January 29,2001 ani*wd by EPA Mdhod 8020 <br /> MTBE=Methyl-terilery-butyl ether <br /> TBA a Tertiary butyl altrottcl or tertiary butanol <br /> DIPS=Di-isopropyl eOw <br /> ETBE=Etl yt to chary butyl ether <br /> TAME=Tertiary emyl me"ether <br /> EDB=Ethylene olbromide <br /> 1,2 DCA=12 Dichloroethane <br /> TOC=Tap of Casing Elovahon <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwatw <br /> uglL a Parts per billion <br /> MSL=Mean sealerel <br /> ft=Feet <br /> yr=Below detedion imh <br /> (D)a Duplrrate sample <br /> NA a Not applicable <br /> ND a Not detected at or abovethe minimum quantitation loft <br /> Notes. <br /> MTBE by EPA mdhod 8260 was run cut of rwmnmended hold time,value should be considered an estimate, <br /> am <br /> TMs sample was wWyzW outside of EPA reoornmended hold time. <br /> b-TEPH with SHICa Gel cleanup <br /> c=Hydrocarbon reported does not match the pattern of the laboratory*standard <br /> Site surveyed January 7,2D02,by Virgil Chaves Land Surveying of Vallejo,Coldomra <br /> i <br /> I <br /> Page 6 <br /> 1 <br />