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_ WELL COWNTRATIONS <br /> - - Shell-branded Service Station <br /> - - 7700 Moreland Street r <br /> Stockton, CA <br /> MTBE Depth to GW <br /> - Well ID Date _TPPH B T E X 8260 DIPS ETBE TAME TBA Ethanol TOC Water Elevation <br /> u IL (ug/L (ug/L) (ug/L) (u /L) IL (ug/L (uglL (u IL) (ug/L) (u /L) MSL ft MSL) <br /> - -- Abbreviations <br /> -— TPPH =Total petroleum hydrocarbons as gasoline by EPA Method 8260B <br /> BTEX=Benzene,toluene, ethylbenzene, xylenes by EPA Method 82608 <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 8260B <br /> TAME=Tertiary amyl methyl ether,analyzed by EPA Method 8260E <br /> TBA=_Tertiary butanol or tertiary butyl alcohol,analyzed by EPA Method 8260B <br /> _ - TOC=Top of Casing Elevation <br /> GW=Groundwater <br /> ug/L= Parts per billion <br /> -- - _ MSL= Mean sea level <br /> ft = Feet <br /> <n= Below detection lima <br /> NA= Not applicable <br /> Notes <br /> Ethanol analyzed by EPA Method 8260B <br /> Site surveyed October 25, 2002 by Virgil Chavez Land Surveying of Vallejo, CA <br /> Wells MW-7, MW-8,and MW-9 surveyed on May 21, 2004 by Virgil Chavez Land Surveying of Vallejo, CA <br /> - Page 4 <br />