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I <br /> 1 TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> ' Knowles-Rock <br /> Stockton,California <br /> Page I of 6 <br /> ' (in parts per billion) <br /> Well Date Methanol Ethanol TBA, XTBE DEPE ETRE TAME LZ DCA Elly <br /> ' VW1 Feb-98 -- - <100 <5 0 <5 0 <5 0 <5 0 <br /> Feb-00 -- - 670 <50 <50 <50 <50 <br /> May-00 <50,000 Q5,000 <5,000 <500 <500 <500 <500 <500 <500 <br /> ' Aug-00 <25,000 <12,500 <2,500 <250 Q50 QSO <250 <250 490"" <br /> Nov-00 <40 000 <20,000 <4,000 <400 <400 <400 <400 <400 1,200 <br /> Mar-01 I <100,000 <50,000 <4,000 <400 <400 <400 <400 <400 590 <br /> ' May-01 - <2000 <200Q00 <200 QOO 390 1,200 <br /> Aug-01 <2000 <200 <200 <200 <200 630 800 <br /> i <br /> Dec-01 Not Sampled <br /> Feb-02 <br /> ' VW2e <10,000 <5,000 <1,000 <100 <100 <100 <100 <100 <100 <br /> <4,000 Q 000 <400 <40 <40 <40 <40 <40 <40 <br /> <10,000 <5,000 <400 <40 <40 <40 <40 <40 <40 <br /> — -- <200 <20 <20 QO Q0 Q0 <20 <br /> -- Not Sampled <br /> Dec-01 <400 490 <40 <40 <40 <40 <40 <br /> Feb-02 - <400 1 <40 <40 <40 <40 <40 1 <40 <br /> VW3 Nov-97 - - <100 QO <20 QO QO -- - <br /> � ' Feb-98 - - <100 <5 0 <5 0 <5 0 <5 0 — <br /> 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 Q50 <50 <5 0 <5 0 <5 0 <5 0 <5 0 <5 0 <br /> Nov-00 <500 Q50 <50 <5 0 <5 0 <5 0 <5 0 <5 0 <5 0 <br /> Mar-01 <2,500 <1,250 <100 <10 <10 <10 <10 <10 <10 <br /> ' May-01 — Q0 Q0 QO Q0 QO <20 Q0 <br /> Aug-01d: 4=0 <4 0 <4 0 <4 0 <4 0 <4 0 <4 0 <br /> Dec-01 Not Sampled <br /> Feb-02 - -- <20 <2 0 <2 0= <2 0 <2 0 <2 0 Q 0 <br /> ' VW4 Nov-97 jY _ <250 <50 <50 <50V<55 <br /> =_ <br /> Feb-98 <100 <5 0 <5 0 <5 0Feb-00 -- — <50 <5 0 20 <5 0 -- -- <br /> May-00 <500 <250 <50 <5 0 <S 0 <5 0 34 <5 0 <br /> Aug-00 <500 <250 <50 <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 1 <4 0 <4 0 <4 0 270 <4 0 <br /> Aug-OI Not Sampled <br /> Dec-01 - - <20 <20 <20 1 <20 <20 97 <20 <br /> Feb-02 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 Q50 <50 <5 0 <5 0 <5 0 <5 0 <5 0 <5 0 <br /> Mar-01 <500 Q50 QO Q 0 Q 0 <2 0 Q 0 <2 0 Q 0 <br /> May-01 -- -- <20 <20 <20 <20 1 <20 <20 Q0 <br /> Aug-01 Not Sampled <br /> ' Dec-0I - — <20 —<2 0 1 <20 1 <20 QO QO <20 <br /> Feb-02 Not Sampled <br /> 1 <br /> 1 <br />