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TAR 2 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> FOR OXYGENATES <br /> FORMER APACHE PLASTICS FACILITY <br /> 2050 EAST FREMONT STREET <br /> STOCKTON,CALIFORNIA <br /> Date TBA MTBE DIPE ETBE TAME 1,2-DCA EDB <br /> WELL# Sampled (µi;/L) Gµg/L) (lrg[L) OWL) Gµg/L) (11g2) (µg2) <br /> MW-11 L 05/18/01 <10 <0 5 <1 0 <1 0 <1 0 <1 0 NA <br /> 11/05/01 <5 0 <0 5 <1 0 <10 <1 0 <1 0 NA <br /> 02/14/02 <5 0 <0 50 <10 <1 0 <1 0 10 NA <br /> 05/20/02 <5 0 <0 50 <10 <10 <1 0 <1 0 NA <br /> 08/27/02 <5 0 <0 50 <1 0 <1 0 <1 0 32 NA <br /> 12/05/02 <5 0 <0 50 <1 0 <1 0 <1 0 27 <2 0 <br /> MW-12 L 05/18/01 <10 <0 5 <1 0 <1 0 <10 <1 0 NA <br /> 11/05/01 NA NA NA NA NA NA NA <br /> 02/14/02 <5 0 <0 50 <1 0 <1 0 <1 0 10 NA <br /> 05/20/02 <5 0 <0 50 <1 0 <1 0 <1 0 <1 0 NA <br /> 08/27/02 <5 0 <0 50 <1 0 <1 0 <1 0 1 7 NA <br /> 12/05/02 <5 0 076 <10 <10 <1 0 20 <2 0 <br /> NOTES <br /> * =Reporting limits were increased due to high concentrations of target analytes <br /> ** <br /> —Well was previously identified as MW-I All groundwater samples have been <br /> collected from well VEW-2 <br /> *** =Reporting limits increased due to sample foaming <br /> j TBA=Tertiary butyl alcohol <br /> MTBE=Methyl tertiary butyl ether <br /> DIPE=Di-isopropyl ether U=Screened in upper water bearing zone <br /> ETBE=Ethyl tertiary butyl ether L=Screened in lower water bearing zone <br /> TAME—Tertiary amyl methyl ether NA=Not Analyzed <br /> 1,2-DCA-1,2-Dichloroethane µg/L= rmcrograms per liter <br /> Apache_Quarterly_Data Page 4 of 4 5T1:aTU5 <br /> I <br />