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WELL CONCENTRATIONS <br /> Shell branded Service Station <br /> �112fiT Country Club <br /> Stockton, CA <br /> Wic #204-7524-0204 <br /> �r <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water Elevation Thickness <br /> (ug/L u IL (U/L u IL u IL) (u IL) ((u/L (u /L) (MSL ft. MSL ft. <br /> �i 11 <br /> S-6 05/06/1999 <50.0 <50.0 <0.500 <0.500 <0.500 <0.500 <5.00 <2.00 4.00 10.62 -6.62 NA <br /> S-6 08/31/1999 <50.0 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 <2.00 4.00 10.61 -6.61 NA <br /> S-6 11/22/1999 <50 <50.0 <0.50 <0.50 <0.50 <0.50 <2.5 <2.00 4.00 13.32 -9.32 NA <br /> S-6 02/01/2000 <50.0 <50.0 <0.500 <0.500 <0.500 <0.500 <2.50 NA 4.00 13.22 -9.22 NA <br /> S-6 05/03/2000 NA NA NA NA NA NA NA NA 4.00 9j71 -5.71 NA <br /> S-6 08/16/2000 NA NA NA NA Q NA NA NA NA 4.00 11.51 -7.51 NA <br /> S-6 11/27/2000 NA NA NA NA NA NA NA NA 4.00 12.73 -8.73 NA <br /> 2-6b 0112912001 <50 <50 <0.50 <0.50 <0.50 <0.50 NA <5.0 4.00 12.55 4.55 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 801}5 <br /> BTEX= benzene,toluene,ethylbenzene,xylenes by EPA Method 8020 <br /> MTBE= methyl-tertiary-butyl ether <br /> TOG=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 4 <br />