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TABLE 3 OXYGENATED COMPOUNDS IN GROUNDWA FER Knowles -Roek Stockton, California 0 Page 4 of 11 (in pat is per billion) � t�� IS a iari+4� I tb iold° B IMT13E, - t`� MW2 Nov-97 160 <20 <20 <20 <20 Feb-98 -- <100 <5 0 <5 0 <5 0 <5 0 -- -- ' Nov-99 =Y <50 <5 0 <5 0 <5 0 <5 0 ++ Feb-00 <50 <5 0 <5 0 <5 0 <5 0 May-00 <2,500 <1,250 <250 <25 <25 <25 <25 260 <25 I Aug-00 <500 <250 <50 <5 0 <5 0 <5 0 <5 0 <5 0 <5 0 Nov-00 <500 <250 <50 <5 Q <5 0 <5 0 <5 0 15 <5 0 Mar-OI <1,000 1 <500 <40 <4 0 <4 0 <4 0 <4 0 56 14 I May-01 -- -- E-<:2 2Q <2 0 <2 0 <2 0 <2 0 41 12 Aug-01 0 <2 0 <2 0 <2 0 <2 0 65 <2 0 Dec-01 Not Sampled ' Feb-02 - -- <20 <2 0 1 <2 0 <2 0 <2 0 35 <2 0 May-02 Not Sampled Aug-02 -- -- <20 <2 0 1 <2 0 <2 0 <2 0 29 <2 0 ' Nov-02 -- -- Not Sampled Feb-03 66 <20 1 <20 <2 0 <2 0 13 1 <2 0 May-03 Not Sampled Aug-03 -- -- <20 <2 0 1 <2 0 <2_0 1 <2 0 L___2-6 T- 00 lie Nov-03 Not Sampled Feb-04 -- -- <20 <2 0 <2 0 <2 0 <2 0 17 <2 0 ' May-04 -- - Not Sampled M -- - W3 Nov-97 <35 <5 0 <1 Q <1 0 <1 0 Feb-98 -- -- <100 <5 0 <5 0 <5 0 <5 0 -- -- ' May-98 -- -- 21 19 11 <10 <10 -- Aug-98 26 27 <10 <10 <10 Nov-98 -- -- <50 220 <10 <10 <10 -- -- ' Feb-99 =_ - <330 1,600 <65 <65 <65 -- May-99 <250 1,400 <25 0 <25 0 <25 0 Aug-99 -- -- <200 1,400 <20 <20 <20 -- -- Nov-99 <250 1,500 X25 <25 <25 -- -- -- -� Feb-00 <250 4,000 X25 <25 <25 -- May-00 <5,000 <2,500 <500 3,800 <50 <50 <50 <50 <50 ' Aug-00 <5,000 <2,500 <500 1,200 <50 <50 <50 <50 <50 Nov-00 <2,500 <1,250 <250 2,600 <25 <25 <25 <25 45 Mair-01 <25,000 <12,500 <1,000 1,200 <100 <100 <100 <100 <100 ' May-01 -- -- <200 3,800 <20 <20 <20 <20 <20 Aug-01 -- -- <250 2,000 <25 <25 X25 <25 <25 I Dec-01 <500 17,000 <50 <50 <50 <50 <50 Feb-02 <1,000 15,000 <100 <100 <100 <100 <100 • May-02 ^' <2,000 34,000 <200 <200 <200 <200 <200 ' Aug-02 <1,000<1,000 24,000 <100 <100 <100 <100 <100 Nov-02 <4,000 3,300 t <400 <400 <400 <400 <400 I