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TABLE 2 GROUNDWATER ANALYTICAL DATA I Knowles-Rock Stockton,California Page 5 of 15 I (in parts per billion) Well Date` ,,TPHg Benzene Toluene Ethylhenzene Xylenes MTBE MW-5 5/29/2003 24,000 2,200 140 1,200 1,300 <20 Cont'd 8/27/2003 13,000 1,000 70 300 400 <20 11/20/2003 25,000 4,300 330 1,500 2,300 <20 2/26/2004 27,000 3,000 200 1,500 1,800 <20 5/20/2004 13,000 1,400 100 25 120 <20 8/25/2004 5,800 1,500 45 360 340 <20 111/17/20041 16,000 3,300 190 1,000 1,500 <I0 MW-6 5/16/1995 440 47 18 18 10 11/9/1995 540 66 83 12 21 2/8/1995 520 <05 <0 5 <05 30 -- 4/24/1996 950 43 43 38 29 =_ 8/7/1996 250 <05 <0 5 <0 5 <05 11/5/1996 270 78 <05 <05 <0 5 -- 2/5/1997 310 45 <05 <05 <0 5 =_ 5/7/1997 240 6 8 <05 <05 <0 5 7/23/1997 140 1 2 <05 <0 5 <0 5 <5 0 11/19/1997 120 <0 5 <0 5 <0 5 <05 <50 2/26/1998 110 <0 5 <05 <05 <05 <5 0 5/6/1998 170 <05 <05 <05 I8 -- 8/11/1998 120 <05 <05 <05 <05 - I . 11/11/1998 <50 <05 <0 5 <05 <05 y= 2/11/1999 <50 <0 5 <0 5 <0 5 <05 5/4/1999 <50 <05 <05 <0 5 <0 5 -- 8/4/1999 <50 <0 5 <05 <0 5 <05 11/17/1999 <50 <05 <0 5 <05 <0 5 <50 2/3/2000 130 22 <0 5 <0 5 <05 <5 0 5/9/2000 71 1 5 <05 <05 <0 5 <50 8/15/2000 88 16 <0 5 <05 <05 <5 0 11/21/2000 120 1 4 <05 <05 <0 5 <5 0 3/7/2001 <50 09 <0 5 <0 5 <05 <2 0 I 5/23/2001 <50 1 5 <05 <05 <0 5 <2 0 9/30/2001 Not Sampled 12/6/2001 <50 to <0 5 <0 5 <1 4 <2 0 2/20/2002 Not Sampled 5/22/2002 <50 07 <05 <05 <l 0 <2 0 8/26/2002 Not Sampled 11/13/2002 <50 <0 5 <0 5 <0 5 <10 <2 0 2/19/2003 Not Sampled 5/29/2003 <50 <05 <05 <0 5 <l 0 <20 8/27/2003 Not Sampled 11/20/2003 <50 <0 5 <0 5 1 <05 <1 0 <20 2/25/2004 Not Sampled 5/20/2004 <50 <0 5 <05 <0 5 <10 <2 0 8/25/2004 Not Sampled 11/17/2004 <50 <05 <0 5 <05 <10 <2 0 I