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i <br /> CAMBRIA <br /> Table 1 Groundwater Analyl ical Data-Fuel Oxygenates and Lead Scavengers,Shell-branded Service Station,6131 Pacific Avenue,Stockton,California <br /> Sample Date TBA MTBE DIPE ETBE TAME Ethanol Methanol 1,2-DCA EDB <br /> ( ) ( ) (Ae) ( } ( ) (Ug/1) ( ) ( ) -(lug/,) <br /> VEW-2 09-Oct-97 <100 <2 0 <2 0 <2 0 <2 0 <500 <1,000 NA NA <br /> VEW-2 10-Feb-98 <10,000 <200 <200 <200 <200 <50,000 <5,000 NA NA <br /> VEW-2 20-May-98 <20,000 <400 <400 <400 <400 NA NA NA NA <br /> VEW-2 29-Jul-98 <14,300 <286 <286 <286 <286 <71,500 NA NA NA <br /> VEW-2 23-Nov-98 <10,000 <200 <200 <200 <200 NA NA NA NA <br /> VEW-2 24-Feb-99 <10,000 <100 <100 <100 <t00 <150,000 <10,000 NA NA <br /> VEW-2 13-May-99 <12,500 <t25 <125 <125 <t25 <62,500 <1,000 NA NA <br /> VEW-2 20-Aug-99 <4,000 636 <40 0 <40 0 <40 0 <20,000 <1,000 NA NA <br /> VEW-2 16-Aug-00 <400 228 <20 0 120 0 <20 0 NA NA NA NA <br /> VEW-2 30-Aug-01 <250 <25 <25 <25 <25 NA NA NA NA <br /> VEW-2 10-Dec-01 <250 <25 <25 <25 <25 <500 NA NA NA <br /> VEW-2 03-Sep-02 <500 <50 <50 <50 <50 NA NA NA NA <br /> VEW-2 26-Aug-03 <500 <50 <200 1200 <200 NA NA <50 <50 <br /> Abbreviations and Notes <br /> TBA=Tertiary butyl alcohol or tertiary butanol <br /> MTBE=Methyl tertiary butyl ether <br /> D1PE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Tertiary amyl methyl ether <br /> Methanol by EPA 8015(Modified) <br /> 1,2-DCA=1,2-Dichloroethane <br /> EDB=Ethylene dibromide <br /> All other analyses by EPA Method 8260 <br /> µg11=Micrograms per liter(parts per billion) <br /> NA=Not analyzed <br /> <x=Not detected at reporting limit <br /> 0854 Page 5 of 5 <br />