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TABLE 2 GROUNDWATER ANALYTICAL DATA Knowles-Rock Stockton,California Page 8 of 15 (en parts per brll ron) Well Date TPHg Benzene Toluene Ethylhenzene Xylenes MTBE MW-9 5/912000 <50 ^v 4 <0 5 <0 5 <D 5 27 Cont'd 8/15/2000 <50 <0 5 <0 5 <0 5 <0 5 15 11/21/2000 89 06 06 <0 5 <0 5 13 3/7/2001 <50 <0 5 <0 5 <0 5 <0 5 98 5/23/2001 <50 <0 5 <0 5 <0 5 <0 5 85 8/29/2001 <50 <05 <0 5 <0 5 <0 5 60_ 12/6/2001 Not Sampled 2/20/2002 <50 <0 5 <0 5 <0 5 <1 0 87 5/22/2002 Not Sampled 8/26/2002 <50 <0 5 <0 5 1 <0 5 <1 0 82 11/13/2002 Not Sampled 2/20/2003 <50 <0 5 <0 5 1 <05 <1 0 1 51 5/28/2003 Not Sampled 8/27/2003 <50 <0 5 <0 5 <0 5 <1 0 21 11/19/2003 Not Sampled 2/25/2004 <50 <0 5 <0 5 1 <0 5 <1 0 4 9 5/20/2004 Not Sampled 8/25/2004 <50 <0 5 <0 5 <05 <1 0 33 11/17/2004 Not Sampled 2/23/2005 <50 <0 5 <0 5 1 <0 5 <1 0 1 5 5/25/05- Not Sampled 6/8/2006 MW-10 5/16/1995 260 19 41 39 11 -- 11/9/1995 1,700 320 34 31 250 -- 2/8/1995 5,200 760 68 82 440 4/24/1996 13,000 1,50o 51 570 1,400 -- 8/7/1996 2,400 130 <0 5 88 80 -- 11/5/1996 1,000 29 1 <05 14 87 -- 2/5/1997 480 14 <0 5 <0 5 <0 5 -- 5/7/1997 530 11 <0 5 <0 5 <0 5 -- 7/23/1997 260 49 <0 5 <0 5 <0 5 <5 0 11/20/1997 190 <0 5 <0 5 <0 5 <0 5 <5 0 2/26/1998 220 <0 5 <0 5 <0 5 <0 5 <5 0 5/6/1998 83 <0 5 <0 5 <0 5 <0 5 -- 8/11/1998 <50 <0 5 <0 5 <0 5 <0 5 11/1111998 <50 <0 5 <0 5 <0 5 <0 5 -- 2/11/1999 <50 <0 5 <0 5 <0 5 <0 5 -- 5/4/1999 <50 <0 5 <0 5 <0 5 <0 5 -- 8/4/1999 110 <0 5 <0 5 <0 5 <0 5 - I t/17/1999 120 <0 5 <0 5 <0 5 <0 5 <5 0 2/3/2000 <50 <0 5 <0 5 <0 5 <0 5 <5 0 5/9/2000 130 28 <0 5 1 1 17 <5 0 8/15/2000 <50 <0 5 <0 5 1 <05 <0 5 <5 0 11/21/2000 180 15 <0 5 <0 5 <0 5 <5 0 3/7/2001 99 10 <0 5 <0 5 <0 5 42 5/23/2001 <50 <0 5 <0 5 <0 5 <0 5 2 0 8/30/2001 Not Sampled 12/6/2001 <50 <0 5 <0 5 1 <0 5 <1 0 10 2/20/2002 Not Sampled