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TABLE 2 GROUNDWATER ANALYTICAL DATA ' Knowles-Roek • Stockton, California Page 10 of 15 ' (in parts per billion) Well Date TPHg Benzene Toluene Ethylbenzene Xylenes I MTBE MW-12 5/16/1995 <50 <0 5 <0 5 <0 5 <0 5 -- ' 11/9/1995 220 44 <0 5 <0 5 <0 5 -- 2/8/1995 <50 <0 5 0<-05 5 <0 5 -- ' 4/24/1996 190 <0 5 5 <0 5 =_ 8/7/1996 95 <0 5 511/5/1996 88 <0 5 5 <0 5 2/5/1997 100 <0 5 5 <0 55/7/1997 74 <0 5 5 <0 57/22/1997 <50 <0 5 5 <0 5 <5 0 <50 <0 5 5 <0 5 <5 0 11/19/1997' 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 2/10/1999 <50 <0 5 <0 5 <0 5 <0 5 12 5/4/1999 <50 <0 5 <0 5 <0 5 <0 5 <5 0 8/4/1999 <50 <0 5 <0 5 <0 5 1 <0 5 <5 0 ' 11/18/1999 <50 j <0 5 <0 5 <0 5 <0 5 <5 0 2/3/00- Not Sampled 5/9/2000' . <0 5 <S 0 8/14/2000 <50 <0 5 <0 5 <0 5 11/20/2000 <50 <0 5 <Q 5 <0 5 <0 5 <5 0 3/7/2001 62 07 <0 5 <0 5 <0 5 13 ' 5/23/20 0 1 <50 <0 5 09 <0 5 14 34 8/29/2001 <50 <0 5 <0 5 <0 5 <0 5 48 12/6/2001 Not Sampled ' 2/20/2002 j 68 1 1 6 1 8 1 10 7 0 100 5/22/2002 Not Sampled 8/26/2002 <50 <0 5 <0 5 <0 5 <0 5 110 11/13/2002 Not Sampled ' 2/20/2003 <50 <0 5 <0 5 1 78 5/28/2003 Not Sampled 8/27/2003 <5Q <0 5 <0 5 <0 5 <l 0 60 ' 11/19/2003 Not Sampled 2/26/2004 <50 <0 5 <0 5 <0 5 <1 0 51 5/20/2004 Not Sampled ' 8/25/2004 <50 <0 5 <0 5 <0 5 <1 0 110 11/17/2004 Not Sampled 2/23/2005 <50 <0 5 <0 5 <0 5 <1 0 71 MW-13 11/9/1M94,000 11,000 5,200 2,100 8,200 ' 2/9/1 12,000 32,000 3,700 18,000 - 4/25/ 5,300 28,000 2,800 14,001 <1600 8/8/10 6,000 30,000 3,800 20,000 -- ' 11/6/ 0 4,800 32,000 2,000 22,000 == 2/6/1 3,200 19,000 11700 12,000 • 5/8/1997 90,000 4,200 15,000 3 400 20 000 -- 1