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I TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> Knowles-Roek <br /> Stockton, California <br /> Page 11 of l 1 <br /> din parts per billion) <br /> �WelLry-Iu pate,r Methanol ,Ekhanol TBA . MS F D1P ETBE<eTAME f 2 <br /> .-..a�aT�d E,-a s„e ,•�';�a �a 3u <br /> I MW 1SB Jan-03 Y- -- <20 76 <2 0 <2 0 <2 0 53 <2 0 <br /> Feb-03 <20 S6 <2 0 <2 0 <2 0 84 <2 0 <br /> May-03 -- <20 190 <2 0 <2 0 <2 0 90 <2 0 <br /> Aug-03 y -- <20 320 <2 0 <20 <2 0 68 <2 0 <br /> Nov-03 <20 440 <2 0 <2 0 <2 0 64 <2 0 <br /> Feb-04 -- -- <20 400 <2 0 <2 0 <2 0 48 <2 0 <br /> I <br /> May-04 <20<20 300 <2 0 <2 0 <2 0 60 <2 0 <br /> Aug-04 <40 450 <4 0 <4 0 <4 0 88 <4 0 <br /> Nov-04 -- -- <50 940 <5 0 <5 0 <5 0 1 68 <5 0 <br /> MW 15C Jan-03 -- -- <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> I <br /> Feb-03 <20<20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> May-03 <20 <l 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> Aug-03 -- -- <20 <10 <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 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> May-04 -- <20 <2 0 <2 0 <2 0 <2 0 24 <2 0 <br /> Aug-04 == <220 <0 <2 0 <2 0 <2 0 29 <2 0 <br /> Nov-04 <20 <2 0 <2 0 <2 0 <2 t1 23 <2 p <br /> MW15A Jan-03 — <1000 2500 <100 <100 <100 <]Ud <100 <br /> • Feb-03 <400 2,900 <40 <40 <40 <40 <40 <br /> I <br /> May-03 <400<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 /> I Feb-04 =` <400 1,500 <40 <40 <40 <40 <40 <br /> Mav-04 <400 760 <40 <40 <40 <40 <40 <br /> Aug-04 <1,000 580 <100 <100 <100 <100 <100 <br /> I Nov-04 == <100 960 <10 <10 <10 <10 <10 <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 -- -- <400 <40 <40 <40 <40 <40 <40 <br /> I May-04 = - <200 <20 <20 <20 <20 <20 <20 <br /> Aug-04 <1,000 <100 <100 <100 <I00 <100 <100 <br /> Nov-04 — -- <100 14 <10 <10 <10 <10 <10 <br /> DOTES <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 tert-butyl ether <br /> MTBE = Methyl Cert butvl ether <br /> TAME — tert-amyl methyl ether <br /> TBA = rert-butanol(tertiary butyl alcohol) <br /> 12 DCA 1,2 Dichloroethane <br /> I EDB ti Ethylenedtbromide <br /> < Less than the indicated detection Imnit <br /> ` = Resampled 12/16/97 <br /> I "' — Amended result (Argon Laboratory corresp 1217/00) <br />