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' TABLC 2 GROUNDWATER ANALYTICAL DATA Knowles-Rock Stockton, California Page 10 of 15 (in parts per billion) Vi TPHg Benzene Toluene thyllpelnze e� e e MW-11 5/20/2004 <50 <0.5 <0.5 <0.5 <1.0 120 ' MW-12 5/16/1995 <50 <0.5 <0.5 <0.5 <0.5 -- 11/9/5995 220 4.4 <0.5 <0.5 <0.5 -- ' 2/8/1995 <50 <0.5 <0.5 <0.5 <0.5 �= 4/24/1996 190 <0.5 <0.5 <0.5 <0.5 8/7/1996 95 <0.5 <0.5 <0.5 <0.5 -- 11/5/1996 88 <0.5 <0.5 <0.5 <0.5 -- 2/5/1997 100 <0.5 <0.5 <0.5 <0.5 5/7/1997 74 <0.5 <0.5 <0.5 <0.5 -- I ' 11/19/19971 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 2/26/1998 <50 <0.5 <0.5 <0.5 <0.5 <5.0 ' 5/5/1998 <50 <0.5 <0.5 <0.5 <0.5 <5.0 8/11/1998 <50 <0.5 <0.5 <0.5 <0.5 <1.0 11/10/1998 <50 <0.5 <0.5 <0.5 <0.5 <1.0 2/10/t999 <50 <0.5 <0.5 <0.5 <0.5 1.2 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 11/18/1999 <50 <0.5 <0.5 <0.5 <0.5 <5.0 2/3/00- 5/9/2000 Not Sampled ' 8/14/2000 <50 <0.5 <0.5 <0.5 <0.5 <5.0 11/20/2000 <50 <0.5 <0.5 <0.5 <0.5 <5.0 3/7/2001 62 0.7 <0.5 <0.5 <0.5 13 ' 5/23/2001 <50 <0.5 0.9 <0.5 1.4 34 8/29/2001 <50 <0.5 <0.5 <0.5 <0.5 48 12/6/2001 Not Sampled ' 2/20/2002 68 1.6 1.8 1.0 7.0 200 5/22/2002 Not Sampled 8/26/2002 <50 <0.5 <0.5 <0.5 <0.5 110 ' 1 t/13/2002 Not Sampled 2/20/2003 <50 <0.5 <0.5 1 <0.5 <1.0 78 5/28/2003 Not Sampled ' 8/27/2003 <50 <0.5 <0.5 T <0.5 <1.0 60 11/19/2003 Not Sampled 2/26/2004 <50 <0.5 <0.5 1 <0.5 <1.0 51 1 5/20/20041 Not Sampled -- MW-13 11/9/1995 65,000 11,000 5,200 2,100 8,200 2/9/1995 170,000 12,000 32,000 3,700 18,000 -- 4/25/1996 140,000 5,300 28,000 2,800 14,000 <1600 8/8/1996 160,000 6,000 30,000 3,800 20,000 -- 11 /1996 130,000 4,800 32,000 2,000 22,000 2/6/1997 94,000 3,200 19,000 1,700 12,000 := 51811997 90,000 4,200 18,1.100 3 400 20,000