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WELL CONCENTRATIONS <br /> Former Shell Service Station <br /> 1267 Country Club <br /> Stockton,CA <br /> MTBE MTBE �I Depth to GW <br /> Well 10 Date TPPH TEPH B T E X 8026 8260 TBA DWE ETRE TAME EDB 1,2-DCA Ethanol Methanol TOC Water Elevation <br /> u L u L (u /L) u u L u L u t< u L u L u /L u L u L u /L u /L u LII (u /L (MSL) ft MSL <br /> Abbreviations II <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82808,pnor 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 82808,prior to January 29,2001,analyzed by EPA Method 8020 <br /> MTBE=Methyl-lerhary-butyl ether <br /> TBA=Tertiary butyl alcohol or tertiary butanol <br /> D1PE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Tertiary amyl methyi ether <br /> EDS=Ethylene dibromide <br /> 1,2-DCA=1 2-Dichloroethane <br /> TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> uglL=Parts per billion <br /> MSL=Mean sea level <br /> ft=Feet <br /> <n=Below detection limit <br /> (D)=Duplicate sample <br /> NA=Not applicable <br /> ND=Not detected at or above the minimum quantitation tints <br /> I <br /> Notes <br /> MTBE by EPA method 8280 was run out of recommended hold time value should be considered an estimate <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 /> Site surveyed January 7 2002,by Virgil Chavez Land Surveying of Vallejo California <br /> I <br /> i <br /> • 06 s . <br />