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WELL CONCENTRATIONS <br /> Shell'-branded Service Station <br /> 1267 Country Club <br /> Stockton, CA <br /> Pic #204-7524-0204 <br /> BE MTBE Depth to Elevatlo SPH <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water n Thickness <br /> uIL u 1 (ug/L (u IL) (u IL (ug/L (ug/L (ug/L MSL (ft. �I (MSL) (ft. <br /> ]f 11 <br /> S-6 11/10/1998 <50 <50 <0.50 <0.50 ]1 <0.50 <0.50 <2.5 NA 4.00 13.0011 1 -9.00 NA <br /> S-6 02/11/1999 <50.0 <60.0 <0.500 <0.50011 <0.500 <0.500 <2.00 <0.500" 4.00 12.0111 11 -8.01 NA <br /> S-6 05/06/1999 <50.0 <50.0 <0.500 <0.50011 <0.500 <0.500 <5.00 <2.00 4.00 10.6211 -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 10.6111 -6.61 1 NA <br /> S-6 11/22/1999 <50 <50.0 <0.50 <0.50 <0.50 <0.50 <2.5 <2.00 4.00 13.3211 -9.32 NA <br /> S-6 02/01/2000 <50.0 <50.0 <0.500 <0.50011 <0.500 <0.500 <2.50 NA 4.00 13.2211 -9.22 NA <br /> S-6 05/03/2000 NA NA NA NA ]1 NA NA NA NA 4.00 9.7111 -5.71 NA <br /> S-6 08/16/2000 NA NA NA NA 11 NA NA NA NA 4.00 11.5111 -7.51 NA <br /> S-6 11/27/2000 NA NA NA NA 11 NA NA NA NA 4.00 12.7311 -8.73 NA <br /> S-6 01/29/2001 <50 <50 <0.50 <0.50 ]1 <0.50 <0.50 NA <5.0 4.00 1 12.5511 -8.55 NA <br /> S-6 06105/2001 NA NA NA NA ]f NA NA NA NA 4.00 11.7811 1 -7.78 NA <br /> Abbreviations: <br /> TPPH=Total petroleum hydrocarbons as gasoline by modified 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 /> • P* <br />