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TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> Knowles- Roek <br /> Stockton, California <br /> Page 2 of 10 <br /> (in parts per billion) <br /> Well Date Methanol Egan©l TBA X'TBE D1PE ET'DE TAME 112 DCA EDB <br /> VW4 Nov-97 -- -- <250 <50 <56 <50 <50 -- -_ <br /> Feb-98 -- -- <100 <5 0 <5 0 <5 0 <5 0 -- -- <br /> Feb-00 -- -- <50 <5 0 20 <5 0 <5 0 -- -- <br /> May-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 34 <5 0 <br /> Aug-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 <5 0 <5 0 <br /> Nov-00 <1,000 <500 <100 <10 <10 <10 <10 130 <10 <br /> Mar-01 <2,500 <1,250 <100 <10 <10 <10 <10 190 <10 <br /> May-O 1 -- -- <40 <4 0 <4 0 <4 0 <4 0 270 <4 0 <br /> Aug-0l Not Sampled <br /> Dec-0l -- -- <20 <20 <2 0 <2 0 <2 0 97 <2 0 <br /> Feb-02 Not Sampled <br /> May-02 -- <20 <2 0 <20 <2 0 <2 0 110 <2 0 <br /> Aug-02 Not Sampled <br /> Nov-02 -- -- <20 7<2—0--F-<-2 0 <2 0 <2 0 48 T <2 0 <br /> Feb-03 Not Sampled <br /> May-03 -- -- <20 . <20 1 <20 <2 0 <2 0 75 <2 0 <br /> Aug-03 Not Sampled <br /> • VW5 Feb-00 -- -- <50 <5 0 <5 0 <5 0 <5 0 -- -- <br /> May-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 <5 0 <5 0 <br /> Aug-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 <5 0 <5 0 <br /> Nov-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 <5 0 <5 0 <br /> Mar-01 <500 <250 <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> May-01 -- -- <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> Aug-01 Not Sampled <br /> Dec-0I -- -- <20 <2 0 <2 0 <2 0 <2 0 <2 0 <2 0 <br /> Feb-02 Not Sampled <br /> May-02 -- -- <20 <2 0 <2 0 <2 0 <2 0 <20 1 ._<20 <br /> Aug-02- <br /> May-03 Not Sampled <br /> Aug-03 Not Sampled <br /> VW6 Nov-97 -- -- <670 <135 <135 <135 <135 -- -- <br /> Feb-98 -- -- <500 <30 <30 <30 <30 -- -- <br /> Feb-00 -- -- <250 <50 <50 <50 <50 -- -- <br /> May-00 <10,000 <5,000 <1,000 <100 <100 <100 <100 <100 <100 <br /> Aug-00 <10,000 <5,000 <1,000 <100 <100 <100 <100 <100 <100 <br /> Nov-00 <4,000 <2,000 <400 <40 <40 <40 <40 <40 <40 <br /> Mar-01 <25,000 <I2,500 <1,000 <100 <100 <100 <100 <100 <100 <br /> May-OI -- -- <1,000 <100 <100 <100 <100 <100 <100 <br /> . Aug-01 -- -- Not Sampled <br /> Dec-01 <500 <50 <50 <50 <50 <50 <50 <br />