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TABLE 2 GROUNDWATER ANALYTICAL DATA Knowles-Rock Stockton,California Page 2 of 15 (3n parts per bilhon) Well Date TPHg Benzene Toluene Ethylbenzene Xylenes MTBE MW-2 7!23/1997 76,000 10,000 1,200 21&00 14,000 <100 Cont'd 1Il21/1997 92,000 7,900 4,500 2,900 15,000 <20 2/27/1998 2,600 68 18 30 150 <5 0 5/6!1998 2,400 97 34 16 140 8/12/1998 2,000 100 87 43 210 1171011998 4,400 280 210 130 530 2/12/19991 790 110 14 16 74 5/4/1999 850 54 46 46 100 8/3/1999 710 59 40 38 93 11/17/1999 110 69 <0 5 <0 5 38 <5 0 2/4/2000 210 38 13 51 5 4 <5 0 5!9/2000 6,600 760 170 510 700 <25 8/1512000 <50 <0 5 <0 5 <0 5 <0 5 <0 5 11122/2000 290 32 <0 5 98 7 ; <5 0 3/7!2001 5,200 440 140 180 600 <4 0 5/24/2001 3,100 510 170 120 320 <2 0 8130/2001 81 62 1 1 13 5 6 <2 0 12/6/2001 Not Sampled 2/2112002 540 89 54 27 49 <2 0 5/22/2002 Not Sampled 8/27/2002 290 20 11 1 12 41 <2 0 1113/2002 Not Sampled 2120/2003 4,200 230 35 150 330 66 5/29/2003 Not Sampled 8/28/2003 2,000 75 49 46 180 <2 0 1101912003 Not Sampled 2/26/2004 4,600 660 64 160 310 <2 0 5/20/20041 Not Sampled 8/25!2004 15,000 1,700 750 1,100 3,700 <20 11/17/2004 Not Sampled 2123/2005 17,000 3,200 20 1 11300 1,400 26 5125/05- Not Sampled 3/7/2006 MW-3 5/16/95- Not Sampled l l/9!(995 2/8/1995 350 <0 5 <0 5 <0 5 <0 5 4124/1996 110 <0 5 <0 5 <0 5 <0 5 817/1996 140 <0 5 <0 5 <0 5 <0 5 11/5/t996 190 1 7 <0 5 <05 <0 5 - 2/5/1997 180 30 <0 5 <0 5 <0 5 5/7/1997 270 loo <0 5 <0 5 <0 5 7/23/1997 620 120 <0 5 <0 5 <0 5 <5 0 11/20/1997 550 59 <0 5 <05 <0 5 <5 0 2/2711996 770 86 <0 5 63 20 <5 0 5/6/1998 640 50 <0 5 to 52 19 8/12/1998 690 220 <0 5 44 49 27 11/1011998 1,600 360 <10 11 47 220 2/1211999 6,000 4,600 54 160 740 1,600 5!4/1999 4 600 3 700 10 68 96 1 400