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TABLE 2 GROUNDWATER ANALYTICAL DATA Knowles-Roek Stockton, California Page 7 of 15 (:n parts per billion) Wdl Date .4 TPHg Benzene Toluene Ethylbenzene Xylenes MTBE I 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 -- I 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 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 ' 8/30/2001 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 39 <2 0 ' 5/29/2003 2,100 72 55 36 i 110 <2 0 8/27/2003 240 32 43 14 60 <2 0 11/20/2003 170 <0 5 19 us 31 <2 0 ' 2/26/2004 290 8 1 42 25 79 <2 0 5/20/2004 130 74 47 23 83 <2 0 8/25/2004 630 33 29 16 57 55 11/17/2004 210 <0 5 17 1 1 33 <2 0 ' 2/23/2005 420 19 11 10 34 <0 5 MW-9 5/16/1995 <50 2 6 <0 5 <0 5 63 11/9/1995 420 48 20 22 58 - 2/8/1995 56 5 0 <0 5 19 39 -- 4/24/1996 240 27 12 10 17 8/7/1996 1,200 46 23 21 60 - ' 11/5/1996 360 21 08 45 10 -+ 2/5/1997 170 12 <0 5 5 0 12 5/7/1997 150 25 <0 5 12 22 -- 7/23/1997 210 23 <0 5 98 21 <5 0 ' 11/19/1997 180 14 38 64 22 93 2/26/1998 360 23 15 15 21 22 5/6/1998 1 360 18 <0 5 12 19 -- 8/12/1998 110 11 <0 5 45 49 11/11/1998 89 76 <0 5 26 1 5 2/11/1999 <50 06 <0 5 <0 5 <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 <05 <05 <05 <05 18 ' 2/3/2000 78 0 8 Q 7 <0 5 <0 5 22