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WELL COATRATIONS • <br /> Former Shell Service Station <br /> 2575 Country Club <br /> Stockton,CA <br /> MTBE MTBE Depth to GW SPH <br /> Well ID Date TPPH B T E X 8020 8260 DIPE ETRE TAME TBA Methanol Ethanol EDB 1,2-DCA TOC Water Elevation Thickness <br /> u (ug/L)-.U/.LLu IL u 1L u 1L u /L u IL u !L u IL u !L u !L u u !L u !L MSL ft MSL tt <br /> Sannella Pier 01/2812000 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA 13 90 11 18 272 NA <br /> TB 07/0612004 NA NA NA NA NA NA <0 50 <20 <20 <20 <50 NA NA NA NA NA NA NA NA <br /> TB 10!0812004 NA NA NA NA NA NA <0 50 <20 <20 <20 <50 NA NA NA NA NA NA NA NA <br /> TB 01/31/2005 NA NA NA NA NA NA <0 50 <20 <20 1 <20 1 <50 1 NA I NA NA NA NA NA NA NA <br /> Abbreviations <br /> TPPH=Total petroleum hydrocarbons as gasoline by EPA Method 82608,prior to July 27,2001,analyzed by EPA Method 8015 <br /> BTEX=Benzene toluene,ethylbenzene,xylenes by EPA Method 82608 prior to July 27,2001,analyzed by EPA Method 8020 <br /> MTBE=Methyl tertiary butyl ether <br /> DIPE=DHsopropyl ether,analyzed by EPA Method 8260B <br /> ETRE=Ethyl tertiary butyl ether,analyzed by EPA Method 8260E <br /> TAME=Tertiary amyl methyl ether,analyzed by EPA Method 8260B <br /> TBA=Tertiary butyi alcohol or tertiary butanol,analyzed by EPA Method 82608 <br /> EDB=1,2-Dibromoethane,analyzed by EPA Method 8260B <br /> 1,2-DCA=1,2-Dichloroethene,analyzed by EPA Method 82608 <br /> TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons <br /> GW=Groundwater <br /> uglL=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 /> Page 23 <br />