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TABLE OXYGENATED COMPOUNDS IN GROUNDWATER Knowles-Roek Stockton,California Page 2 of 12 (in parrs per billion) r r.ei a2aie v)eivannt .iutnanoR. I1sA1)t1'l ETBE:; TAME 1;2 DCA EDB: VW3 Nov-02 <20 4.0 <2.0 12.0 <2-or <2.0 <2.0 Cont'd Feb-03 <100 <10 <10 <10 <10 <lo <10 May-03 Not Sampled Aug-03 <200 <20 <20 <20 QO <20 <20 Nov-03 Not Sampled Feb-04 <2Q0 <20 <20 <20 <20 <20 <20 May-04 Not Sampled Aug-04 <40 55 <4.0 <4D <4.0 c4.0 <4.0 Nov-04 Not Sampled Feb-05 <200 S1 <20 <20 <20 <20 <20 May-05- Dec-05 Not Sampled VW4 Nov-97 <250 <50 <50 <50 <50 -- -- Feb-98 <106 1 <5.0 <5.0 <5.0 <5.0 Feb-00 <50 1 <5.0 20 <5.0 <5.0 -- May-00 <500 <250 <50 <5,0 <5.0 <5.0 <5.0 34 <5.0 Aug-00 <500 <250 <50 <5.0 <5.0 <5.0 <5.0 <5.0 -<5.0- Nov-00 <1,000 <500 <100 <10 <10 <10 <10 1 130 <10 Mar-01 <2,500 <t,250 <l00 <10 <10 <10 <10 190 <10 May-01 <40 <4.0 <4,0 <4.0 <CO 270 70 Aug-01 Not Sampled Dec-01 <20 <2.0 1 <2.0 <2.0 <2.0 97 <2.0 Feb-02 Not Sampled May-02 <20 <2.0 1 <2.0 <2.0 <2 0 110 <2.0 Aug-02 Not Sampled Nov-02 <20 <2,0 1 <2.0 <2A Feb 03 Not Samplcd May-03 <20 7F <2.0 1 <2,0 <2.0 <2.0 75 <2.0 Aug-03 Not Sampled Nov-03 <20 1 <2.0 1 <2.0 <2.0 <2.0 30 <2.0 Feb-04 Not Sampled May-04 <20 L<2.0 1 <2.0 <2.0 <2.0 G0 <2.0 Aug-04 Not Sampled Nov-04 -- <20 7270 <2.0 Q.0 <2.0 49 <2.0 Feb-05- Not Sampled Dec-05 VW5 Feb-00 -- -- <50 <5.0 <5.0 <5.0 <5.0 May-00 <500 <250 <50 <5.0 <5.0 e5.0 <5.0 <5.0 <5.0 Aug-00 <500 <250 <50 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 Nov-00 <500 <250 <50 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 Mar-01 <500 <250 <20 <2.0 <2.0 <2.0 <2.0 <2.0 <2.0 ! May-01 -- -- <20 <2,0 <2.0 <2.0 <2.0 <2.0 <2.0 Aug-01 Not Sampled Dec-01 1 <20 1 <10 <2.0 <2.0 4.0 <2.0 <2.0 Feb-02 Not Sampled May-02 <20 1 <2.0 <2.0 <2.0 <2.0 1 <2.0 <2.0 Aug-02- Dec-05 Not Sampled VW6 Nov-97 <670 c]35 <135 g<135 <135 Feb-98 7500 730 730 730 Feb-00 <250 <50 <50 <50 Ma -00 <10000 <500Q <1000 <100 <100 100 7100 7100