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WELL CONC�TRATIONS <br /> Former Texaco Service Station <br /> 440 W. Charter Way <br /> Stockton, CA <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TOC Water Elevation Thickness <br /> u !L ug/L) (u IL) (u IL) (u IL {u IL (u IL) ((ug/L (MSL) ft MSL ft <br /> VEW-2 05/16/2000 1 7192 NA 183 0 922 1 <0 500 1 0 723 794 1,360 NA 1 1902 NA NA <br /> VEW-2 08/30/2000 1 <50 0 467 0 644 1 <0 500 1 <0 500 1 <0 500 1 301 500 1 NA 1 2034 NA NA <br /> VEW-3 05/16/2000 <50 0 NA 489 119 0 606 233 632 986 NA 1913 NA NA <br /> VEW-3 08/30/2000 <50 0 162 <0 500 <0 500 <0 500 <0 500 8 55 961 NA 2027 NA NA <br /> VEW4 05/16/2000 347 NA 866 290 <0 500 184 206 608 NA 1927 NA NA <br /> VEW-4 08/30/2000 291 1,720 4 43a 1 3 21a j <0 500a 0 910a <2 50a 142 NA 2048 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 /> ug/L= parts per billion <br /> msl = Mean sea level <br /> ft= Feet <br /> <n= Below detection limit <br /> NA= Not applicable <br /> ND= Not detected at or above the minimum quantitation limit <br /> Notes <br /> a= Result reported was generated out of hold time <br /> Page 23 <br />