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WELL CO CENTRATIONS <br /> Shell-branded Service Station <br /> 6131 Pacific Avenue - <br /> Stockton, CA <br /> IVITBE MTBE Depth to Dept to W S H O <br /> Well ID Date TPPH B T E X 8020 8260 TOC Water SPH Elevation Thickness Reading <br /> (ug/L (u/L (u/L (u/L (u/L u L u IL MSL ft ft MSL ft I Innn-il <br /> VEW-2 11/07/2002 68,000 1,200 660 2,200 14,000 NA <250 1314 3613 NA -2299 NA NA <br /> VEW-2 02/21/2003 82,000 1,900 1,500 2,600 16,000 NA 5250 1314 3505 NA -2191 NA NA <br /> VEW-2 03/14/2003 NA NA NA NA NA NA NA 1314 3470 NA -2156 NA NA <br /> VEW-2 1 05/07/2003 1 82,000 1 1,600 1 1,100 1 3,000 16,000 1 NA 5250 1314 3424 NA -21 10 NA NA <br /> VEW-2 1 08/26/2003 1 110,OOOT 2,400 3,600 1 3,000 19,000 NA <50 1314 37 25 NA -2411 1 NA NA <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608,prior to May 11, 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 82608, prior to May 11,2001, 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 /> DO=Dissolved Oxygen <br /> ug/L= Parts per billion <br /> ppm = Parts per million <br /> MSL= Mean Sea Level <br /> ft=Feet <br /> <n=Below detection limit <br /> NA= Not Applicable <br /> Page 13 <br /> I <br />