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WELL <br /> CONCRTRATIONS • <br /> Shell-branded Service Station <br /> 2494 Fremont Street <br /> Stockton, CA <br /> WIG #204-7524-1806 <br /> MTBE MTBE Depth to GW Thicknes <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevation s <br /> u IL (ug/L (ug/L u IL u IL u IL u IL MSL ft (MSL) <br /> ft <br /> Abbreviations <br /> TPPH =Total petroleum hydrocarbons as gasoline by modified 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 /> I I <br /> I <br /> I <br /> Page 3 <br />