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ITABLE 2 GROUNDWATER ANALYTICAL DATA Knowles-Roek Stockton, California Page 6 of 15 (in parts per brllran) Well Date TPHg Benzene Toluene Ethylbertzene. Xylenes MTBE ' MW-7 5/16/1995 <50 <0 5 <0 5 <0 5 <0 5 - 11/9/1995 110 40 <0 5 <0 5 <0 5 2/8/1995 120 <0 5 <0 5 <0 5 <0 5 - 4/24/1996 <50 <0 5 <0 5 <0 5 <0 5 -- 8/7/1996 <30 <0 5 <0 5 <0 5 <0 5 11/5/1996 <50 <0 5 <0 5 <0 5 <0 5 2/5/1997 110 <0 5 <0 5 <0 5 <0 5 - ' 5/7/1997 <50 <0 5 <0 5 <0 5 <0 5 - 7/22/1997 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 111 9/1 997 <50 <0 5 <0 5 <0 5 <0 5 <5 0 ' 2/25/1998 <50 <0 5 <0 5 <0 5 -05 <5 0 5/5/1998 <50 <0 5 <0 5 <0 5 <0 5 -- 8/11/1998 <50 <0 5 <0 5 <0 5 <0 5 -- ' 11/10/1998 100 79 81 20 18 -- 2/10/1999 <50 <0 5 <0 5 <0 5 <0 5 5/4/1999 <50 <0 5 20 5 <0 5 <0 5 <5 0 8/4/1999 <50 <0 5 <0 5 <0 5 <0 5 <5 0 ' 11/17/1999 80 11 52 1 1 69 12 2/3/2000 <50 10 12 <0 5 06 20 5/9/2000 <50 1 1 06 <0 5 <0 5 33 ' 8/15/2000 <50 <0 5 <0 5 <0 5 <0 5 <5 0 11/21/2000 85 <0 5 <0 5 <0 5 <0 5 12 3/7/2001 1 <50 06 <0 5 <0 5 <0 5 39 ' 5/23/2001 <50 <0 5 <0 5 <0 5 <0 5 7 0 8/29/2001 <50 <0 5 <0 5 <0 5 <0 5 18 12/6/2001 Not Sampled 2/20/2002 <50 <5 0 <5 0 1 <5 0 <1 0 240 ' 5/22/2002 Not Sampled 8/26/2002 <50 <5 0 <50 <5 0 <1 0 280 11/13/2002 Not Sampled ' 2/20/2003 <50 <0 5 <0 5 1 <0 5 <1 0 110 5/29/2003 Not Sampled 8/27/2003 <50 <0 5 <0 5 <0 5 <1 0 68 11/19/2003 Not Sampled 2/26/2004 <50 <0 5 <0 5 1 <0 5 <1 0 150 5/20/2004 Not Sampled 8/25/2004 <50 <0 5 <0 5 <0 5 <1 0 140 ' 11/17/2004 Not Sampled 2/23/2005 <50 <0 5 <0 5 <0 5 <1 0 32 MW-8 5/16/1995 97,000 3,100 5,200 1,900 9,000 -- ' 11/9/1995 55,000 2,100 2,800 1,400 6,700 -- 2/9/1995 12,000 600 350 310 1,100 4/25/1996 14,000 920 560 370 1,200 - ' 8/8/1996 20,000 700 530 450 1,300 -= 11/6/1996 12,000 460 350 190 630 2/6/1997 9,600 410 370 190 570 -- ' 5/8/1997 9,600 640 690 300 860 7/23/1997 9,100 490 470 170 680 <20 11/20/1997 2,900 98 89 51 140 <5 0 2/27/1998 4 400 220 94 37 150 <5 0 1