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WELL CONCENTRATIONS <br /> Shell-branded Service Station <br /> 2320 North Eldorado <br /> Stockton, CA <br /> MTBE Depth to GW <br /> Well ID Date TPPH B T E X 8260 DIPE ETBE TAME TBA Ethanol TOC Water Elevation <br /> u IL u /L u IL u IL u IL u IL u IL u IL u fl u IL u !L MSL ft MSL <br /> Abbreviations !' <br /> TPPH =Total petroleum hydrocarbons as gasoline by EPA Method 82608 <br /> BTEX= Benzene,toluene, ethylbenzene,xylenes by EPA Method 82606 . <br /> MTBE =Methyl tertiary butyl ether <br /> DIPE=Di-isopropyl ether, analyzed by EPA Method 8260B <br /> ETBE=Ethyl tertiary butyl ether, analyzed by EPA Method 82606 <br /> TAME=Tertiary amyl methyl ether, analyzed by EPA Method 82608 <br /> TBA W Tertiary butyl alcohol, analyzed by EPA Method 8260B h <br /> TQC=Top of Casing Elevation ; <br /> GW= Groundwater <br /> ug/1-= Parts per billion - <br /> MSL=Mean sea level <br /> ft =Feet � <br /> <n=Below detection limit - <br /> NA=Not applicable J< <br /> Notes <br /> a= Hydrocarbons reported as TPH as gasoline do not exhibit a typical gasoline chromatographic pattern/Hydrocarbon does not match pattern of laboratory's standard <br /> b=Hydrocarbons reported as TPPH do not exhibit a typical Gasoline chromatographic pattern for sample MW-2 Two compounds not normally associated with gasoline, <br /> Tetrachloroethene and Trichloroethene,are present in the TPPH spectrum for sample MW-2 " <br /> Ethanol analyzed by EPA Method 82606 - - <br /> Site surveyed March 7, 2003 by Mid Coast Engineers y; _ <br /> y <br /> t <br /> l l <br /> Page 3 <br /> ! ,, i <br /> i • <br />