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` I <br /> TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> Knowles- Roek <br /> Stockton, California <br /> Page 6 of 6 <br /> (in parts per billion) <br /> Well Date Methanol Ethanol TBA MTBE RIPE ETBE TAME 1,2 DCA EDB <br /> MW13 Nov-97 -- -- <50 <5 0 <5 0 <5 0 <5 0 <br /> Feb-98 -- -- <500 <30 <30 <30 <30 <br /> Ma -98 -- -- <600 <60 <60 <60 <60 _ <br /> Au -98 -- -- <250 <50 <50 <50 <50 <br /> Nov-98 -- -- <500 <100 <100 <100 <100 <br /> Feb-99 -- -- <5,000 <100 <100 <100 <100 -- <br /> May-99 -- -- <50 <500 <50 <50 <50 -- <br /> Au -99 -- <500 <50 <50 <50 <50 -- <br /> Au -00 <10,000 <5,00U <1,000 <100 <100 <100 <100 <100 <]UO <br /> Nov-00 <20,000 <10,000 <2,000 <200 <200 <200 <20U <2U0 <2UU <br /> Mar-01 <50,000 <25,000 <2,000 <2pq j <2U0 <200 <200 <2UU <200 <br /> Ma -01 -- -- <2,000 <200 <200 <20U <2UU <200 <2UU <br /> Au -01 <br /> DeLA1 Not Sdmpled <br /> MW14 Mar-01 <50,000 <25,000 <2,000 24,000 <200 <200 <200 <200 <200 <br /> ay 01 -- -- <5,000 15,000 <500 <500 <500 <500 <500 <br /> Au -0I -- -- <400 3, 00 <40 <40 <40 <40 <40 <br /> Dec-0l -- <500 34 000 <50 <50 <SU 370 <Sq <br /> NOTES <br /> Analyzed using modified EPA method 9260 <br /> Bold values indicate value at or above method detection limit <br /> D1PE = Di-isopropyl ether <br /> ETBE = Ethyl tert-butyl ether <br /> MTBE — Methyl tert-butyl ether <br /> TAME = tert-amyl methyl ether <br /> TBA = tert-butanol(tertiary butyl alwhol) <br /> 1,2 DCA = 1,2 DiLhloroethane <br /> EDB = Ethylenedibromtde <br /> < = Less than the indicated detection limit <br /> ` = Resampled 12/16/97 <br /> ** = Amended result (Argon Laboratory cotresp, 12/7100) <br /> I <br />