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TABLE3 <br /> OXYGENATED COMPOUNDS IN GROUNDWA'T'ER <br /> Knowles-Rock <br /> Stockton,California <br /> Page 4of12 <br /> (in park per billion) <br /> Well Date Methanol Ethanol TSA MTBIE DIPS ETRE TAME 1,2 DCA EDB <br /> MW2 Nov-97 160 <20 QO 40 <20 - <br /> Feb-98 <100 <5 0 <5 0 <5 0 <50 <br /> Nov-99 <50 <5 0 <5 0 <5 0 <5 0 - <br /> Feb-00 <50 <5 0 <5 0 <5 0 <5 0 <br /> May-00 4 500 <1 250 <250 <25 45 X25 <25 260 <25 <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 <50 <5 0 <5 0 15 <5 0 <br /> Mar-01 <1 000 <500 <40 <4 0 �<4 0 <4 0 <4 0 56 14 <br /> May-01 -- - <20 <2 0 c2 0 4 0 <2 0 41 12 <br /> Aug-01 <20 <2 0 4 0 1 <2 0 <2.0 65 4 0 <br /> Dec-01 Not Sampled <br /> Feb-02 X20 <20 <0 <20 <2 6 35 <2 0 <br /> May 02 Not Sampled <br /> Aug-02 <20 4 0 <2 0 4 0 4 0 29 <2 0 <br /> Nov-02 Not Sampled <br /> Feb-03 66 <20 <2 0 <2 D <2 0 18 <2 0 <br /> Ma -03 Not Sampled <br /> Aug-03 QD <2 0 <2 0 <2 0 <2 0 26 <20 <br /> Nov-03 Not Sampled <br /> Feb-04 <20 <2 0 <2 0 <2 0 4 0 17 <2 0 <br /> May 04 Not Sampled <br /> Aug-04 400 QO <20 <20 <20 38 <20 <br /> Nov-04 Not Sampled <br /> Feb-05 — <200 26 <20 <20 <20 -:10 <20 <br /> May-05 Not Sampled <br /> Jun-06 <br /> MW3 Nov 97 - <35 <50 <1 0 <1 0 <10 - - <br /> Feb-98 = <100 <5 0 <5 0 <5 0 <5 0 -- <br /> May-98 21 19 11 X10 <10 <br /> Aug-98 26 27 <10 <10 <10 <br /> Nov-98 <50 220 <10 <10 <10 - <br /> Feb-99 -- <330 1,600 <65 <65 <65 <br /> May 99 <250 1,400 <25 0 <25 0 <25 0 — <br /> Au 99 <200 1,400 <20 <20 <20 - <br /> Nov-99 <250 1,500 <25 <25 45 - <br /> Feb-00 <2$0 4,000 <25 <25 <25 - <br /> May 00 <5,000 <2 500 <500 3,800 <50 <50 <50 <50 <50 <br /> Aug-00 <5 000 <2 500 <500 1,200 <50 <50 <50 <50 <50 <br /> Nov 00 4 500 <1 250 X250 2,600 <25 <25 <25 <25 45 <br /> Mar-01 <25 000 <12 500 <1 000 1,200 <100 <100 <100 <100 <100 <br /> May-01 - -- <200 3,800 <20 <20 <20 <20 <20 <br /> Aug-01 <250 2,000 <25 <25 <25 <25 <25 <br /> Dec-01 — X500 17,000 <50 <50 <50 <50 <50 <br /> Feb-02 <1 000 15,000 <100 <100 <100 <100 <100 <br /> May-02 <2 000 34,000 400 <200 <200 <200 400 <br /> Aug-02 <1000 24,000 400 <too <100 <100 <100 <br /> Nov-02 <4 000 5,300 <400 <400 <400 <400 <400 <br /> Feb-03 <2,000 41,000 <200 <200 <200 <200 <200 <br /> May-03 <10 000 28,000 4,000 <1 000 <1 000 <1 000 <1 000 <br /> Aug 03 <2 000 34,000 <200 <200 <200 Q00 <200 <br /> Nov-03 <2 000 46,000 <200 <200 <200 400 400 <br /> Feb-04 <2 000 52,000 400 400 <200 <200 <200 <br /> May 04 <2 000 35,000 400 <200 <200 400 400 <br /> Aug 04 <4 000 25,000 <400 <400 <400 <400 <400 <br /> Nov 04 <1 000 42,000 <100 400 <100 <100 <100 <br /> Feb-05 <2 000 1 24,000 <200 <200 <200 1 400 L <200 <br /> May-05 Not Sampled <br /> Jun 06 <br />