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' TABLE 3 <br /> OXYGENATED COMPOUNDS IN GROUNDWATER <br /> Knowles-Roek <br /> ' Stockton,California <br /> Page 5 of 6 <br /> (m parts per billion) <br /> ' Well I Date Met11anofEthanit;I TBA MTBE DIPE ETBE TAME 1,2 RIGA EDB <br /> MW10 Nov-97 -- - 15 <5 0 76 <10 <10 -- <br /> Feb-98 -- - <100 <5 0 <5 0 <5 0 <5 0 - -- <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 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 19 <5 0 <br /> ' Aug-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 23 <5 0 <br /> Nov-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 29 <5 0 <br /> Mar-01 <500 <250 <20 42 <2 0 <2 0 <2 0 17 <2 0 <br /> May-0 I -- -- <20 20 <2 0 <2 0 <2 0 78 <2 0 <br /> Aug-01 _ Not Sampled <br /> Dec-01 Q0 10 1 <24 1 QO <20 16 <20 <br /> Feb-02 Not Sampled <br /> May-02 -- - <20 39 1 <2 0 1 <2 0 <2 0 16 Q 0 <br /> ' MW 11 Nov-9712 <br /> 12 <5 0 94 <1 0 <1 0 = ^_ <br /> Feb-98 <100 <5 0 16 <5 0 <5 0 <br /> May-98 - - 38 <5 0 11 <1 0 <1 0 -- -- <br /> Aug-98 -- 44 <10 28 <10 <10 -- — <br /> t Nov-98 -- — 35 <10 26 <10 <10 - - <br /> Feb-99 — — 18 <10 22 <10 <10 - -- <br /> May-99 - - <50 1 <5 0 16 <5 0 <5 0 -- — <br /> ' <br /> Aug-99 <50<50 <5 0 <5 0 <5 0 <5 0 = _ <br /> Nov-99 <50 <5 0 <5 0 <5 0 <5 0 <br /> Feb-00 -- -- — -- -- -- -- -- <br /> May-00 <500 <250 <50 <5 0 95 <5 0 <5 0 27 <5 0 <br /> Aug-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 37 <5 0 <br /> Nov-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 10 <5 0 <br /> Mat-O 1 <500 <250 <20 <2 0 Q 0 4 0 <2 0 42 <2 0 <br /> ' May-01 -- — QO <20 Q0 <20 <20 86 <20 <br /> Aug-01 Not Sampled <br /> Dec-01 - -- <20 31 <2 0 1 <2 0 <2 0 4 1 <2 0 <br /> Feb-02 Not Sampled <br /> ' <br /> May-02 <20 71 1 <2 0 Q 0 <2 0 26 <2 0 <br /> MW12 Nov-97 42 <5 0 70 <1 0 <1 0 <br /> Feb-98 - 110 <5 0 <5 0 <5 0 <5 0 -- -- <br /> ' May-98 -- -- 49 <5 0 19 <1 0 <1 0 -- <br /> Aug-98 58 <1 0 34 <10 <1 0 <br /> Nov-98 -- -- 45 <1 0 33 <1 0 <1 0 -- -- <br /> Feb-99 — -- 18 12 27 <10 <1 0 - -- <br /> May-99 — _ <50 <5 0 <5 0 <5 0 <5 0 -- -_ <br /> Aug-99 <50 <5 0 <5 0 <5 0 <5 0 <br /> Nov-99 - -- <50 <5 0 <5 0 <5 0 <5 0 -- -- <br /> Feb-00 <br /> Fcb-00 - -- — -- -- -- -- -- — <br /> May-00 <br /> Aug-00 <500 <250 <50 1 <5 0 <5 0 <5 0 <5 0 35 <5 0 <br /> Nov-00 <500 <250 <50 <5 0 <5 0 1 <5 0 <5 0 21 <5 0 <br /> ' Mar-01 <500 <250 <20 13 <2 0 <2 0 <2 0 R1 <2 0 <br /> j May-O I -- -- <20 34 <2 0 <2 0 <2 0 98 <2 0 <br /> Aug-01 -- - <20 48 Q 0 Q 0 <2 0 13 <2 0 <br /> Dec-01 Not Sampled <br /> ' Feb-02 - - <20 200 1 Q O <2 0 <2 0 19 <2 0 <br /> ME-02 Not Sampled <br /> 1 <br /> 1 <br />