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TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> Knowles- Roek <br /> Stockton, California <br /> Page 11 of 11 <br /> (in parts per billion) <br /> MW 15B Jan-03 -- -- <20 76 <2.0 <2.0 <2.0 5.5 <2.0 <br /> Feb-03 -- -- <20 86 <2.0 <2.0 <2.0 8.4 <2.0 <br /> May-03 -- -- <br /> <20 190 <2.0 <2.0 <2,0 9.0 <2.0 <br /> Aug-03 -- -- <20 320 <2.0 <2.0 <2.0 6.$ <2.0 <br /> Nov-03 -- -- <br /> <20 440 <2.0 <2.0 <2.0 6.4 <2.0 <br /> Feb-04 -- <20 400 <2.0 <2.0 <2.0 4.$ <2.0 <br /> MW15C Jan-03 -- -- <20 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 <br /> Feb-03 -- -- <br /> <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 /> Feb-04 -- <20 1 <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-03 -- -- <400 2,900 <40 <40 <40 <40 <40 <br /> May-03 -- -- <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 /> Feb-04 =_ <400 1,500 <40 740 <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 /> May-03 -- -- <400 87 <40 <40 <40 <40 <40 <br /> Aug-03 -- -- <400 120 <40 <40 <40 <40 <40 <br /> Nov-03 -- -- <400 140 <40 <40 <40 <40 <40 <br /> Feb-04 <40 <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 /> DIPE = Di-isopropyl ether <br /> ETRE = Ethyl tert-butyl ether <br /> MTBE = Methyl tert-butyl ether <br /> TAME - rerl-amyl methyl ether <br /> TBA = lert-butanol(tertiary butyl alcohol) <br /> 1,2 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,1217/00) <br /> i <br />