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i <br /> TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> Knowles-Roek <br /> ' Stockton, Callfomla <br /> Page 11 of 11 <br /> (in parts per billion) <br /> I <br /> ---Now <br /> as <br /> m <br /> ' MW 15C Jan-03 == <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> Feb-03 <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> May-03 -- -- <20 <2-0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> ' Aug-03 `= <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> Nov-03 <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> MW16A Jan-03 -- -- <1000 2,500 <100 <100 <100 <100 <100 <br /> � Feb-D3 -- -- <400 2,900 <br /> <40 <40 <40 <40 <40 <br /> May-03 -- -- <br /> <400 1,300 <40 <40 <40 <40 <40 <br /> Aug-03 -- <400 1,400 <40 <40 <40 <40 <40 <br /> ' Nov-03 <400 3,300 <40 <40 <40 <40 <40 <br /> MW16B Jan-03 -- -- <200 170 <20 <20 <20 <20 <20 <br /> Feb-03 -- -- <400 260 <40 <40 <40 <40 <40 <br /> ' M __ __ <400 87 <40 <40 <40 <40 <40 <br /> ay-03 <br /> Aug-03 -- -- <br /> <400 120 <40 <40 <40 <40 <40 <br /> Nov-03 -- -- <400 140 <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 /> D1PE = Di-isopropyl ether <br /> ' ETBE = Ethyl ter(-butyl ether <br /> MTBE = Methyl tert-butyl ether <br /> TAME = tert-amyl methyl ether <br /> ' TBA = tert-butanol(tertiary butyl alcohol) <br /> t,2 DCA — 1,2 Dichloroethane <br /> EDB Ethylenedibromide <br /> < Less than the indicated detection limit <br /> * = Resampled 12/16/97 <br /> ** = Amended result (Argon Laboratory corresp,1217100) <br /> i <br />