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TABLE 2 GROUNDWATER ANALYTICAL DATA Knowles-Roek Stockton, California Page 7 of 15 (in pa;is per billion) Well EDate TP1Ig Benzene Toluene-. Ethylbenzene Xylenes MTBE ' MW-8 5/6/1998 12,000 520 530 180 800 -- Cont'd 8/12/1998 9,500 960 880 220 980 11/11/1998 7,400 422 380 130 530 - ' 2/11/1999 6,800 440 400 140 590 -= 5/4/1999 5,800 460 370 180 490 8/4/1999 4,200 120 140 46 210 -- ' 11/18/1999 850 28 27 82 34 <5 0 2/3/2000 5,500 260 280 82 390 <5 0 5/9/2000 4,400 270 150 120 470 <5 0 8/16/2000 1 5,700 240 300 84 390 <25 ' 11/21/2000 2,800 100 100 37 150 <10 3/7/2001 2,800 140 88 61 240 <4 0 5/24/2001 2,300 130 93 53 220 <2 0 5/30/2001 1,100 40 37 20 93 <2 0 12/7/2001 1,200 47 58 19 75 <2 0 2/21/2002 890 47 39 16 56 <20 ' 5/22/2002 2,200 80 86 39 140 <2 0 8/27/2002 920 33 46 16 60 <2 0 11/13/2002 1,300 33 37 10 43 <2 0 2/20/2003 880 19 29 98 i9-1 <2 0 5/29/2003 2,100 72 55 36 110 <2 0 8/27/2003 240 32 43 14 60 <2 0 11/20/2003 170 <0 5 19 08 31 <2 0 ' 2/26/2004 290 81 42 25 79 <2 0 5/20/2004 130 74 4 7 1 23 83 <2 0 8/25/2004 630 33 1 29 16 57 5 5 ' 11/17/20041 210 <0 5 1 7 1 1 33 <2-0 MW-9 5/16/1995 <50 26 <0 5 <0 5 6 3 11/9/1995 420 48 20 22 58 2/8/1995 56 50 <0 5 19 39 - 4/24/1996 240 27 12 10 17 ^- 8/7/1996 1,200 46 23 21 60 11/511996 360 21 —08 F 45 10 -- 2/5/1997 170 12 <0 5 so 12 -- 5/7/1997 150 25 <0 5 12 22 7/23/1997 210 23 <0 5 98 21 1 <5 0 11/19/1997 18014 38 64 22 93 2/26/1998 360 23 15 15 21 22 5/6/1998 360 18 <0 5 12 19 -- 8/12/1998 110 11 <0 5 4 5 4 9 -- ' 11/11/1998 89 76 <0 5 2 6 1 5 2/11/1999 <50 06 <0 5 <05 <0 5 5/4/1999 <50 <0 5 <0 5 <0 5 <0 5 - 8/4/1999 <50 <0 5 <0 5 <0 5 <0 5 -- 11/17/1999 120 <0 5 <0 5 <0 5 <0 5 18 2/3/2000 78 08 0 7 <0 5 <0 5 22 1