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WELL CONSTRATIONS <br /> Former Shell Service Station <br /> 1267 Country Club <br /> Stockton, CA <br /> MTBE MTBE f Depth to GW <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TBA , DIPE ETBE TAME EDB 11,2-DCA Ethanol , Methanol TOC I Water i Elevation <br /> u IL u 1L u !L u !L u 1L u !L u 1L u IL u IL l u IL u IL u 1L u IL u !L u 1L u 1L) MSL ft (MSL) <br /> S-6 08!1012004 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 399 1521 1122 <br /> S-6 11/2412004 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 399 1576 -11 77 <br /> S-6 02!2512005 <50 <50 b <0 50 <0 50 <0 50 <i 0 NA NA NA NA NA NA NA <0 50 NA NA 399 1393 -994 <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608 prior to January 29 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 82608 prior to January 29,2001,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 EPA Method 82608 <br /> TAME=Tertiary amyl methyl ether analyzed by EPA Method 82608 <br /> TBA=Tertiary butyl alcohol,analyzed by EPA Method 8260B <br /> EDB=Ethylene dibromide analyzed by EPA Method 8260B <br /> 1,2-DCA=1 2-Dichloroethane,analyzed by EPA Method 82608 <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 /> A =Feet <br /> <n=Below detection limit <br /> (D)=Duplicate sample <br /> NA=Not applicable <br /> ND=Not detected at or above the minimum quantitation limits <br /> Nates <br /> a=This sample was analyzed outside of EPA recommended hold time <br /> b=TEPH with Silica Gel cleanup <br /> c=Hydrocarbon reported does not match the pattern of the laboratory's standard <br /> d=Hydrocarbon reported is in the early Diesel range and does not match the laboratory s Diesel standard <br /> "=MTBE by EPA method 8260 was run out of recommended hold time,value should be considered an estimate <br /> Ethanol analyzed by EPA Method 82608 <br /> Site surveyed January 7 2002 by Virgil Chavez Land Surveying of Vallejo,CA <br /> Page 6 <br />