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WELL CONATRATIONS <br /> Shell-branded Service Station <br /> 3725 South Tracy Boulevard <br /> Tracy, CA <br /> MTBE MTBE Depth to GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water Elevation Thickness Reading <br /> ug/LL u IL u IL (ug/L (ug/L (ug/L u 1L u /L)( MSL ft MSL ft m <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82606, prior to January 23,2001,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 23,2001,analyzed by EPA Method 8020 <br /> MTBE=Methyl-tertiary-butyl ether <br /> TOC=Top of Casing Elevation <br /> SPH =Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> DO=Dissolved Oxygen <br /> RW =Rediscovered well <br /> ug/L=Parts per billion <br /> ppm=Parts per million <br /> MSL=Mean sea level <br /> ft=Feet <br /> <n= Below detection limit <br /> D=Duplicate sample <br /> NA=Not applicable <br /> Notes <br /> Wells MW-1 through MW-3,were decommissioned in July 1990 during station reconstruction and replaced by MW-1A through MW-3A in August 1990 <br /> Site surveyed February 24,2002, by Virgil Chavez Land Surveying of Vallejo, California <br /> I <br /> I <br /> Page 7 <br />