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i <br /> WELL CONATRATIONS • <br /> Shell-branded Service Station <br /> 3725 South Tracy Boulevard <br /> Tracy, CA <br /> Wic #204-7884-0901 <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 /> _122/L <br /> u IL (ug/L u IL (ug/L u 1L u IL u IL MSL ft MSL ft m <br /> BF-1 05/01/2000 1850 1 NA 240 <2 50 1 340 150 1 158000 1 106000 NA 870 NA NA NA <br /> BF-1 08/03/2000 <5000j NA 1 160 1 136 1 521 1 259 1 81100 1 118000 1 NA 904 1 NA I NA NA <br /> BF-1 10/30/2000 18300 NA 260 1 1700 1 305_1 3690 1 30300 64700 1 NA 886 1 NA NA I NA <br /> SUMP 11!15/2000 <50 0 NA <0 500 1 <0 500 1 <0 500 <0 500 <2 50 NA NA 1025 NA NA NA <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified EPA Method 8015 <br /> TEPH=Total petroleum hydrocarbons as diesel by modified EPA Method 8015 <br /> BTEX= benzene,toluene,ethylbenzene, xylenes 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 /> ug/L= parts per billion <br /> ppm=parts per million <br /> msl= Mean sea level <br /> ft=Feet <br /> <n= Below detection limit <br /> i <br /> D= Duplicate sample <br /> NA=Not applicable <br /> Notes <br /> The original wells, MW-1 through MW-3,were decommissioned in July 1990 during station reconstruction <br /> They were replaced by MWAA through MW-3A in August 1990 <br /> Page 5 <br />