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' TABLE 2 GROUNDWATER ANALYTICAL DATA Knowles-Rock ' Stockton,California Page 6 of 16 (in parts per billion) Well Dale TPHg Benzene Toluene Ethylbenzene Xylenes MTBE MW-7 5/16/1995 <50 <0.5 <0.5 <0.5 <0.5 11/9/1995 II0 4.0 <0.5 <0.5 <0.5 2/8/1995 120 <0.5 <0.5 <0.5 <0.5 4/24/1996 <50 <0.5 1 <0.5 <0.5 <0.5 8/7/1996 <50 <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 ' 11/19/1997 <50 <0.5 <0.5 <0.5 <0.5 <5.0 2/25/1998 <50 <0.5 <0.5 <0.5 <0.5 <5.0 5/5/1998 <50 I <0.5 <0.5 <0.5 <0.5 -- ' 8111/1998 <50 <0.5 1 <0.5 <0.5 <0.5 -- 11/10/1998 100 7.9 8.1 2.0 18 2/10/1999 <50 <0.5 <0.5 <0.5 <0.5 5/4/1999 <50 <0.5 <0.5 <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 5.2 1.1 6.9 12 2/3/2000 <50 1.0 1.2 <0.5 0.6 20 5/9/2000 <50 1.1 0.6 <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 <50 0.6 <0.5 <0.5 <0.5 3.9 5/23/2001 1 <50 <0.5 <0.5 <0.5 <0.5 7.0 ' 8/29/2001 <50 <0.5 <0.5 <0.5 <0: 18 12/6/2001 Not Sampled 2/20/2002 <50 75.0 <5.0 1 <5.0 <1.0 240 5/22/2002 Not Sampled 8/26/2002 <50 <5.0 <5.0 <5.0 <1.0280 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 1 <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 1 <0.5 <1.0 140 11/17/2004 Not Sampled ' 2/23/2005 <50 <0.5 <0.5 1 <0.5 <1.0 32 5/25/2005 8/17/2005 Not Sampled MW-8 5/16/1995 97,000 3,100 5,200 1,900 9,000 -- ' 11/9/1995 $5,000 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 1 220 1 94 1 37 1 150 1 <5.0 1 1