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I Table 1 Groundwater Monitoring Data and Analytical Results Tosco (Former Unocal) Bulk Plant#0788 8203 East 11th Street f Tracy, California ?I'e11IDl Date DTW GWE TP M):::] TPH(G) B T:' E X'' MTBE . . . (lb)T #U .. . .. b } 1 U-5 05/23/91 -- -- 180' 3,200 42 240 68 440 -= 08130/91 - -- 380 2,200 100 13 71 170 I1/06191 -- -- ND 1,400 66 6.1 54 38 -' I 05/08/92 -- - 380 430 49 16 22 37 08/06/92 -- -- 1202 510 33 3.7 13 4.0 11!1$192 -- -- 56' ND ND ND ND ND -� 01/21193 -- -- 2,600' 3,500 190 350 47 500 -- 44.93 05/261935 8.25 36.68 340 180 13 2.0 17 17 08/24/93 8.28 36.65 250 360 24 6.2 27 22 44.32 11/30193 8.18 36.14 65 ND ND ND ND ND -- h 02/18/94 7.94 36.38 59 91 3.3 0.57 0.63 2.0 -- 05/12/94 7.57 36.75 54 ND 1.4 0.63 ND 0.60 y 08/08/94 7.30 37.02 608 ND ND 1.1 0.56 1.7 =r 11/08/94 8.60 35.72 ND ND ND ND ND ND -'- 02/13/95 8.08 36.24 ND 579 0.90 ND ND ND 10/10/95 8.47 35.85 ND ND ND ND ND ND t 1 02/13/96 7.81 36.51 2,8008 5,100 240 270 250 2,300 11/06/96 7.31 37.01 ND ND ND ND ND ND 05/06/97 6.63 37.69 4908 ND 0.65 ND ND ND -{ 04/29/98 8.03 36.29 1,20010 ND ND ND ND ND ND 12/01/98 8.19 36.13 12010 ND ND ND ND ND ND 05/24/99 7.52 36.80 ND ND ND ND ND ND ND ! 11/08/99 8.49 35.83 10013 ND ND ND ND ND ND U-6 05/23/91 -- -- 280' 240 17 6.0 3.0 22 08/30/91 -- ND ND 0.5 0.5 0.87 1.9 f 11/06/91 -- -- ND 280 8.2 4.8 18 26 05/08/92 -- -- 3W ND ND ND ND ND ,- 08/06/92 -- -- ND 190 2.2 0.78.7 26 I 11/18/92 -- 230 230 6.5 ND 11 16 -- 01/21/93 -- -- 2,300" 6,100 400 99 460 590 - 44.22 05/26/935 7.95 36.27 380 600 15 6.5 34 115 f 08/24/93 7.79 36.43 946 170 0.5 ND 3.5 5.7 43.86 11/30/93 8.21 35.65 ND 120 4.1 1.6 3.1 1.9 -- 02/18/94 8.02 35.84 767 120 t.3 ND 1.8 3.6 'f l 0788 80144 11/08/99