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® WELL C OANTRATIORIS <br /> Shell-branded Service Station <br /> 2494 Fremont Street <br /> Stockton, CA <br /> MTBE MTB@ Depth to G!N SPH <br /> Well ID Date TPPH B T E X 8020 8260 TOC !Nater Elevation Thickness <br /> u IL u ILu IL u /L J291L (ug/L u /L MSL ftMSL ft <br /> Abbreviations <br /> TPPH =Total petroleum hydrocarbons as gasoline by EPA Method 8260B, prior to May 14, 2001, analyzed by EPA Method 8015, except where noted <br /> BTEX=Benzene,toluene, ethylbenzene,xylenes by EPA Method 8260B, prior to May 14, 2001,analyzed by EPA Method 8020, except where noted <br /> MTBE=Methyl-tertiary-butyl ether <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 /> ft=Feet <br /> <n=Below detection limit <br /> NA=Not applicable <br /> Notes <br /> a=Pre-Development water level <br /> b= Post-Development water level <br /> c=This sample analyzed outside of EPA recommended holding time <br /> d=TPPH and BTEX analyzed by EPA Method 8260B <br /> Site surveyed January 8,2000, by Virgil Chavez Land Surveying of Vallejo, California <br /> Site surveyed January 14,2002, by Virgil Chavez Land Surveying of Vallejo,California <br /> Wells S-1-85, S-3-84,and S-4-83 surveyed December 23,2002 <br /> Page 5 <br />