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' TABLE 2 GROUNDWATER ANALYTICAL DATA Knowles-Rock ' Stockton, California . Page 8of15 (in parts per billion) ate PHg Benzene Toleiene Ethylbenze e r MW-9 5/9/2000 <50 0.5 <0.5 <0.5 <0.5 27 Cont'd 8/15/2000 <50 <0.5 <0.5 <0.5 <0.5 15 11/21/2000 89 0.6 0.6 <0.5 <0.5 13 3/7/2001 <50 <0.5 <0.5 <0.5 <0.5 9.8 5/23/2001 <50 <0.5 <0.5 <0.5 <0.5 8.5 8/29/2001 <50 <0.5 <0.5 <0.5 <0.5 6.0 12/6/2001 Not Sampled 2/20/2002 <50 <0.5 <0.5 <0.5 <1.0 8.7 5/22/2002 Not Sampled - ' 8/26/2002 <50 <0.5 <0.5 <0.5 <1.0 8.2 11/13/20021 Not Sampled 2/20/2003 <50 <0.5 <0.5 <0.5 <1.0 5.1 5/28/2003 Not Sampled 8/27/2003 <50 <0.5 <0.5 1 <0.5 <1.0 21 11/19/2003 Not Sampled ' 2/25/2004 <50 <0.5 -0.5 <0.5 <1.0 4.9 5/20/20041 Not Sampled MW-10 5/16/1995 260 19 4.1 3.9 Illie 11/9/1995 1,700 320 34 31 250 2/8/1995 5,200 760 68 82 440 4/24/1996 13,000 1,500 51 570 1,400 -- ' 8/7/1996 2,400 130 - 0.5 88 80 -_ 11/5/1996 1,000 29 - 0.5 14 8.7 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 4.9 < 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 -- ' 11/11/1998 <50 <0.5 -0.5 <0.5 <0.5 '- 2/11/1999 <50 <0.5 . 0.5 <0.5 <0.5 5/4/1999 X50 <0.5 0.5 <0.5 <0.5 -- ' 8/4/1999 11() <0.5 0.5 -0.5 <0.5 -- 11/17/1999 120 <0.5 -0.5 <0.5 <0.5 <5.0 2/3/2000 <50 <0.5 . 11.5 <0.5 <0.5 <5.0 ' 5/9/2000 130 2.8 _- 0.5 1.1 1.7 <5.0 8/15/2000 v0 <0.5 < 0.5 <0.5 <0.5 <5.0 11/21/2000 180 1.5 40.5 <0.5 <0.5 <5.0 3/7/2001 99 1.0 <0.5 <0.5 <0.5 4.2 5/23/2001 <50 <OS r(LS <0.5 <0.5 2.0 8/30/2001 Not Sampled � 12/6/2001 50 <0.5 -0.5 <0.5 <I.0 10 2/20/20021Not Sampled 1