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Ir <br /> 1 <br /> I <br /> 1 <br /> TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> Knowles Property <br /> Stockton, Callfornla <br /> Page 4 of 4 <br /> (in parts per billion) <br /> Nell Date DIPE ETBE MTBE T.MW 1,2 DCA EDS Methanol Ethanol TBA <br /> MW12 Nov-97 7.0 <10 <5 0 <10 -- -- -- 42 <br /> Feb-98 <5 0 <5 0 <5 0 <5 0 -- -- -- -- 110 <br /> Ma -98 1.9 <10 <5 0 <1 0 -- -- -- -- 49 <br /> Aug-98 3.4 <10 <10 <10 -- -- -- -- S8 <br /> Nov-98 3.3 <10 <10 <10 -- -- -- -- 45 <br /> Feb-99 27 <10 1.2 <1 0 -- -- -- -- 18 <br /> May-99 <5 0 <5 0 <5 0 <5 0 -- -- -- -- <50 <br /> Aug-99 <5 0 <5 0 <5 0 <5 0 -- -- -- -- <50 <br /> Nov-99 <5 0 <5 0 <5 0 <5 0 -- -- -- -- <50 <br /> Feb-00 -- -- -- -- -- -- -- -- -- <br /> May-00 -- -- -- -- -- -- -- -- -- <br /> Aug-00 <5 0 <5 0 <5 0 <50 35 <5 0 <500 <250 <50 <br /> MW 13 Nov-97 <5 0 <5 0 <5 0 <5 0 -- -- -- -- <50 <br /> Feb-98 <30 <30 <30 <30 -- -- -- -- <500 <br /> May-98 <60 <60 <60 <60 -- -_ __ <600 <br /> Aug-98 <50 <50 <50 <50 -- -- -- -- <250 <br /> Nov-98 <100 <100 <100 <100 -- -- -- -- <500 <br /> Feb-99 <100 <100 I <100 <100 -- -- =_ -- <5,000 <br /> Mg-99 <50 <50 <500 <50 -- -- <50 <br /> Aug-99 <50 <50 <50 <50 -- -- -- -- <500 <br /> Au -00 <100 <100 <100 <100 <100 <100 <10,000 <5,000 <1,000 <br /> NOTES <br /> Analyzed using modified EPA method 8260 <br /> Bold values indicate value at or above method detection lmut <br /> WE = Di-isopropyl ether <br /> ETBE = Ethyl tent-butyl ether <br /> MTBE = Methyl tert-butyl ether <br /> TAME = tert-amyl methyl ether <br /> TBA = tert-butanol(tertiary butyl alcohol) <br /> 1,2 DCA — 1,2 Dichloroethane <br /> EDB = Ethylenedibronude <br /> < = Less than the indicated detection lurut <br /> * = Resampled 12/16/97 <br /> I <br />