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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 1267 Country Club <br /> Stockton, CA <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH TEPH B T E X 8020 8264 TOC Water Elevation Thickness <br /> (ug/L (ug/L u L (ug/L (ug/L u IL (ug/L u IL MSL ft. MSL ft. <br /> li II <br /> S-6 01/29/2001 <50 <50 <0.50 <0.50II <0.50 <0.50 NA <5.0 4.00 12.55 -8.55 NA <br /> S-6 06/05/2001 NA NA NA NA II NA NA NA NA 4.00 11.78 -7.78 NA <br /> S-6 08/30/2001 NA NA NA NA II NA NA NA NA 4.00 13.52 f f •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 <0.50 <0.50 NA <5.0 3.99 12.35 -8.36 NA <br /> S-6 06/03/2002 NA NA NA NA II NA NA NA NA 3.99 12.50 -8.51 NA <br /> S-6 08/08/2002 NA NA NA NA II NA NA NA NA 3.99 13.73 II -9.74 NA <br /> S-6 11115/2002 NA NA NA NA NA NA NA NA 3.99 14.76 -10.77 NA <br /> S-6 01/03/2003 <50 <50 <0.50 <0.50 <0.50 <0.50 NA 840 3.99 14.04 -10.05 NA <br /> S-6 05114/2003 NA NA NA NA II NA NA NA NA 3.99 13.48 II -9.49 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 /> ug1L= Parts per billion <br /> MSL=Mean sea level <br /> ft= Peet <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 />