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TABLE 2 GROUNDWATER ANALYTICAL DATA Knowles-Roek Stockton, California Page 1 of 11 (in parts per bilhon) Well Date I TPHg Benzene Toluene Ethylbenzene Xylenes MTBE MW-1 05/16/95- 11/09/95 Not Sampled 02/09/95 3,400 57 11 44 48 -- 04/25/96 2,900 94 78 98 10 -- 08/08/96 1,800 49 28 <05 86 -- 11/06/96 970 19 <05 <0 5 54 -- 02/06/97 1,100 33 <05 <0 5 <0 5 -- 05/08/97 850 12 <05 <05 <05 -- 07/23/97 690 <05 <05 <05 <05 <5 0 11/20/97 800 <05 <05 <0 5 <0 5 <50 02/27/98 530 <05 <0 5 <05 <05 <50 05/06/98 440 <05 <05 <05 <05 <5 0 08/12/98 320 <05 <05 <05 <05 <1 0 11/10/98 430 <05 <05 <05 <05 <1 0 02/12/99 260 <05 <05 <05 <05 <1 0 05/04/99 170 <05 <05 <0 5 <05 <5 0 08/03/99 190 <05 <0 5 <05 <05 <50 11/17/99 230 <0 5 <05 <05 <05 <50 02/04/00 400 47 29 10 25 <5 0 05/09/00 440 40 <05 06 <05 <5 0 08/15/00 180 22 <0 5 07 19 <5 0 11/22/00 160 15 <05 <05 07 <5 0 03/07/01 500 39 <05 <05 <05 <2 0 05/24/01 330 38 <05 <05 <05 <2 0 08/30/01 200 <05 <05 <05 <05 <20 12/06/01 Not Sampled 02/21/02 200 <05 <05 1 <05 <05 <2 0 05/22/02 Not Sampled 08/27/02 160 20 <0 5 1 07 15 <2 0 MW-2 05/16/95- 11/09/95 Not Sampled 02/09/95 120,000 12000 2900 3200 17000 -- 04/25/96 110,000 10000 5600 3300 16000 -- 08/08/96 88,000 7300 1000 2300 14000 -- 11/06/96 90,000 8700 2700 1600 15000 -- 02/06/97 91,000 8200 2701) 2300 14001) -- 05/08/97 72,000 8900 3600 2200 15000 -- 07/23/97 76,000 10000 1201) 2800 14001) <100 11/21/97 92,000 7900 4500 2900 15000 <20 02/27/98 2,600 68 18 30 150 <5 0 05/06/98 2,400 97 1 34 1 16 1 140 1 -- 08/12/98 2,000 100 1 87 43 1 210 --