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CAMBRIA <br /> Table 4 Additional Groundwater Chemical Analytical Data-Monitoring Wells,Shell-branded Service Station,6131 Pacific Avenue,Stockton,California <br /> Sample Date Ethanol Methanol TBA MTBE DTPE ETBE TAME <br /> (µg1l) .., (µgrl) (µgh) O g/1) _. (µ$1l) (Ag1l) <br /> VEW-2 30-Aug-01 NA NA <250 <25 <25 <25 <25 <br /> VEW-2 10-Dec-01 <500 NA <250 <25 <25 <25 <25 <br /> MW-10 10-Dec-01 NA NA 120 <50 <50 <5 0 <50 <br /> MW-11 10 Dec-01 NA NA <50 <5 0 <2 0 <2 0 <2 0 <br /> Abbreviations and Notes <br /> TBA=Tertiary butyl alcohol or tertiary butanol <br /> MTBE=Methyl tertiary butyl ether <br /> DIPE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Teruary'atnyl methyl ether <br /> Methanol by EPA 8015(Modifie(l) <br /> All other analyses by EPA Method 8260 <br /> µg/1=Micrograms per liter(parts per billion) <br /> NA=Not analyzed <br /> <x=Not detected at detection limit x <br /> i <br /> 0854 Page 4 of 4 <br />