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WELL CONONTRATIONS <br /> Shell-branded Service Station <br /> 126'r Country Club <br /> Stockton, CA <br /> Wic #204-7524-0204 <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH TEPH B Y E X 8020 8260 TOC Water Elevation Thickness <br /> u IL u & u IL u IL u IL u IL u IL u IL MSL ft. MSL ft. <br /> S-6 11/27/2000 NA NA NA NA NA NA NA NA 4.00 12.73 -8.73 NA <br /> S-6 01129/2001 <50 <50 <0.50 <0.50 <0.50 <0.50 NA <5.0 4.00 12.55 -8.55 NA <br /> S-6 06/05/2001 NA NA NA NA NA NA NA NA 4.00 11.78 -7.78 NA <br /> S-6 08/30/2001 NA NA NA NA NA NA NA NA 4.00 13.52 -9.52 NA <br /> S-6 11/28/2001 NA NA NA NA NA NA NA NA 4.00 14.12 -10.12 NA <br /> S-6 02/18/2002 <50 <50 <0.50 <0.50 40.50 <0.50 t NA 1 <5.0 3.99 12.35 -8.36 NA <br /> Abbreviations: <br /> TPPH =Total petroleum hydrocarbons as gasoline by EPA Method 8260B; prior to January 29, 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 8260B; prior to January 29, 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 /> ug/L= Parts per billion <br /> msl= Mean sea level <br /> ft=Feet <br /> <n= Below detection limit <br /> (D)= Duplicate sample <br /> NA= Not applicable <br /> ND= Not detected at or above the minimum quantitation limits. <br /> i <br /> Page 5 <br />