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TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> Knowles Property <br /> Stockton, Callfomia <br /> Page 6 of 6 <br /> (in parts per bflhon) <br /> Well Date Methanol Ethanol TBA BE DIPE ETBE TAME 1,2 DCA EDB <br /> MW 13 Nov-97 -- <50 <5 0 <5 0 <5 0 <5 0 -- -- <br /> Feb-98 -- -- <500 <30 <30 <30 <'10 -- -- <br /> May-98 -- -- <600 <60 <60 <60 <60 -- -- <br /> Aug-98 -- -- <250 <50 <50 <50 <50 -- <br /> Nov-98 -- -- -500 <100 -100 -100 -100 -- -- <br /> Feb-99 -- <5,000 1<100 <100 <100 <100 -- -- <br /> May-99 -- -- <50 -500 <50 <50 <50 -- -- <br /> Aug-99 -- <500 <50 <50 <50 <50 -- -- <br /> Aug-00 -10,000 <5,000 <11000 <100 <100 <100 -100 <100 <100 <br /> Nov-00 <20,000 -10,000 4,000 <200 <200 <200 400 1 <200 <200 <br /> Mar-01 <50,000 <25,000 <21000 1 <200 <200 <200 <200 <200 <200 <br /> May-OI -- <2,000 <200 <200 <200 <200 <200 400 <br /> Au -01 Not Sampled <br /> MW 14 Mar-01 <50,000 <25,000 -2,000 24,000 -200 <200 <200 -200 -200 <br /> May-01 -- -- -5,000 15,000 -500 -500 -500 -500 -500 <br /> Au -01 -- -- <400 3,100 <40 <40 <40 <40 <40 <br /> NOTES <br /> Analyzed using modified EPA method 8260 <br /> Bold values indicate value at or above method detection limit <br /> RIPE — Di-isopropyl ether <br /> ETBE — Ethyl tert-butyl ether <br /> MTBE _ Methyl tert-butyl ether <br /> FAME = tort-amyl methyl ether <br /> 1 TBA = ter(-butanol(tertiary butyl alcohol) <br /> I <br /> 1,2 DCA — 12 Dichloroethane <br /> EDB = Ethylenedibromide <br /> < = Less than the indicated detection limit <br /> * = Resampled 12/16/97 <br /> ** = Amended result (Argon Laboratory corresp 12/7/00) <br /> i <br /> i <br /> I <br /> i <br /> zfx <br />