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TABLE 2 GROi_1NDWATER ANALYTICAL DATA I Knowles-Rock Stockton, California • Page 1 of 15 (:n parts per billion) s F Well Date TPHg Benzene Toluene Ethylbenzene Xylene �` ST MTBE MW-1 05/16/95- -- 11/9/1995 Not Sampled 2/9/1995 3,400 57 11 44 48 4/25/1996 2,900 94 78 98 10 -- 8/8/1996 1,800 49 2 8 <0 5 86 == 11/6/1996 970 19 <05 <0 5 54 2/6/1997 1,100 33 <0 5 <0 5 <0 5 -- 5/8/1997 850 12 <0 5 <0 5 <0 5 -- 7/23/1997 690 <0 5 <0 5 <0 5 <0 5 <50 11/20/1997 S00 <0 5 <0 5 <0 5 <05 <5 0 2/27/1998 530 <0 5 <0 5 <0 5 <0 5 <50 5/6/1998 440 <0 5 <0 5 <0 5 <0 5 <5 0 8/12/1998 1 320 <05 <0 5 <0 5 <0 5 <10 11/10/1998 430 <0 5 <05 <0 5 <0 5 2/12/1999 260 <0 5 <0 5 <0 5 <0 5 <10 5/4/1999 170 <0 5 <0 5 <0 5 <0 5 <5 0 8/3/1999 190 <0 5 <0 5 <0 5 <0 5 <5 0 11/17/1999 230 <0 5 <05 <0 5 <0 5 <50 2/4/2000 400 47 29 10 25 <50 5/9/2000 440 40 <0 5 06 <0 5 <5 0 . 8/15/2000 180 22 <0 5 07 19 <5 0 11/22/2000 160 I 5 <0 5 <0 5 07 <5 0 3/7/2001 500 39 <0 5 <0 5 <0 5 <2 0 5/24/2001 330 38 <0 5 <0 5 <0 5 <2 0 8/30/2001 200 <05 <0 5 <0 5 <05 <2 0 12/6/2001 Not Sampled 2/21/2002 200 <0 5 <0 5 1 <0 5 <0 5 <2 0 5/22/2002 Not Sampled 8/27/2002 160 20 <Q 5 07 1 5 <2 0 11/13/2002 Not Sampled 2/20/2003 150 <05 <0 5 1 <05 <l 0 <2 0 5/29/2003 Not Sampled 8/28/2003 140 1 7 L <05 1 <0 5 <10 <2 0 11/19/20031 Not Sampled ' 2/26/2004 220 26 <0 5 <0 5 <10 <2 0 5/20/2004 Not Sampled 8/25/2004 86 <05 <05 1 <0 5 <10 <2 0 ' 11/17/2004 Not Sampled 2/23/2005 130 <0 5 <0 5 1 <10 6 4 MW-2 5/16/95- Not Sampled 11/9/1995 ' 2/9/1995 120,000 12,000 2,900 3,200 17,000 -- 4/25/1996 110,000 10,000 5,600 3,300 16,000 -- ' 8/8/1996 88,000 7,300 1,000 2,300 14000 =y 11/6/1996 90,000 8,700 2,700 1,600 15,000 • 2/6/1997 91,000 8,200 2,700 2,300 I4,000 5/8/1997 72,000 8,900 3,600 2,200 15,000 1