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WELL COIJL_,44RATIONS <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon,CA <br /> MTBE MTBE 1,2- Depth to Depth GW SPH DO <br /> Well ID Date TPPH TEPH B T E X 8020 8260 TBA DIPS ETBE TAME DCA EDB Ethanol Methanol TOC Water to SPH Elevation Thickness Reading <br /> u 1L u (UQ/L u u /L u u jug/L)( u 1L u /L u /L u u /L -Lu1L u /L u MSL ft. ft MSL ft. m <br /> EW-2 1/27/2005 1 50 NA <0.50 <0.50 <0.50 <1.0 NA <0,50 NA NA NA NA NA NA NA NA 1 67.80 1 30.48 NA 37.32 NA 3.41 <br /> EW-2 4!8!2005 <50 f NA <0.50 <0.50 <0,50 <1,0 NA <0.50 <5.0 <2.0 <2.0 <2,0 <0.50 <0.50 <50 <0.50 87.80 30.30 NA 37.50 NA 1.8 <br /> Abbreviations: <br /> TPPH-Total petroleum hydrocarbons as gasoline by EPA Method 8260B;prior to July 10,2001,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 July 10,2001,analyzed by EPA Method 8020 _ <br /> MTBE=Methyl tertiary butyl ether <br /> DIPE=Di-isopropyl ether,analyzed-by.EPA Method 82608. . <br /> ETBE=Ethyl tertiary butyl ether,analyzed by EPA Method 8260B,.. , <br /> TAME=Tertiary butyl methyl ether,analyzed by EPA Method 8260B <br /> TBA=Tertiary butyl alcohol,analyzed by EPA Method 8260B <br /> 1,2-DCA=1,2-Dichlomethane,analyzed by EPA Method 8260B <br /> EDB=Ethylene dibromide,analyzed by EPA Method 8260E <br /> .TOC=Top of Casing Elevation <br /> SPH=Separate-Phase Hydrocarbons - <br /> GW=Groundwater a <br /> DO=Dissolved Oxygen _ a <br /> uglL=Parts per billion <br /> ppm=Parts per million w <br /> MSL=Mean sea level <br /> ft.=Feet <br /> <n=Below detection limit <br /> NA=Not applicable <br /> 4 <br /> l <br /> Page 11 <br />