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TABLE 2 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> FOR OXYGENATES AND ADDITIONAL COMPOUNDS <br /> ARCO Service Station No. 548 <br /> 1612 Hatntner Lane, Stockton,California <br /> Well TBA MTBE DIPE ETBE TAME 1,2-DCA <br /> Number Date µg/L µg/L lsg/L µg/L lig/L µ <br /> MW-1 6/26/00 <100 <2 <2 <2 <2 NA <br /> 9128/00 <200 <2 <2 <2 <2 18.9 <br /> 12/18/00' <200 11.6 <2 <2 <2 NA <br /> 3/14/01 <20 19 <1.0 <1.0 <1.0 8.05 <br /> MW-2 6/26/00 <100 <2 <2 <2 <2 NA <br /> 9/28/00 <200 <2 <2 <2 <2 5.28 <br /> 12/18/00' <200 <2 <2 <2 <2 NA <br /> 3/14/01 <100 <5.0 <5.0 <5.0 <5.0 7.45 <br /> MW-3 6126/00 <100 6.3 <2 <2 <2 NA <br /> 9/28/00 <200 161 <2 <2 <2 <2 <br /> 12118/00' <200 <2 <2 <2 <2 NA <br /> 3/14/01 23.2 <1.0 <1.0 <1.0 <1.0 <1.0 <br /> . MW-4 6/26/00 <100 <2 <2 <2 <2 NA <br /> 9/28/00 <200 <2 <2 <2 <2 <2 <br /> 12/18/001 <200 <2 <2 <2 <2 NA <br /> 3/14/01 <20 <1.0 <1.0 <1.0 <1.0 <1.0 <br /> MW-5 6/26/00 <100 42 <2 <2 <2 NA <br /> 9128/00 <200 61 <2 <2 <2 38.4 <br /> 12/18/00' <200 <2 <2 <2 <2 NA <br /> 3/14/01 <20 <1.0 <1.0 <1.0 <1.0 <1.0 <br /> MW-6 6/26/00 <100 14 <2 <2 <2 NA <br /> 9/28/00 <200 3.98 <2 <2 <2 29.2 <br /> 12/18/00' <200 <2 <2 <2 <2 NA <br /> 3/14/01 <20 2.12 <1.0 <1.0 <1.0 28.8 <br /> µg/L=micrograms per liter. TBA=Tertiary butyl alcohol. <br /> Oxygenates analyzed by USEPA Method 8260. MTBE=Methyl tertiary butyl ether. <br /> <=Below detection limit for analytical methods used. DIPE=Di-isopropyl ether. <br /> NA=not analyzed. ETBE Ethyl tertiary butyl ether. <br /> This sample was analyzed outside EPA recommended holding time. TAME=Tertiary array]methyl ether. <br /> 1,2-DCA= 1,2-Dichloroethane <br /> C:lARC0105481QTRLY1200010548 Quarterly Data.XLS Delta <br /> 1 of 1 4/20101 <br />