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WELL CONCITRATIONS <br /> Shell-branded Service Station <br /> 2494 Fremont Street <br /> Stockton, CA <br /> Wic #204-7524-1806 <br /> MTBE MTBE Depth to GWLs <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water Elevatson <br /> u /L u /L u /L u /L u /L u /L u /L MSL t`t MSL <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> BTEX= benzene,toluene, ethylbenzene,xylenes by EPA Method 8020 <br /> MTBE= methyl-ternary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SPH = Separate-Phase Hydrocarbons <br /> GW= Groundwater <br /> ug/L= parts per billion <br /> mst= 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 /> Page 3 <br />