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Table 2 GROUND WATER ELEVATIONS AND SAMPLE ANALYTICAL RESULTS Ruiz Grocery Store 4491 West Durham Ferry Road Tracy,California Sample Collection TOC DTW GWE SPH TPHg B T E X MTBE No. Date (feet) (feet) (feet) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) MW-1 9/7/91 98.44 9.46 88.98 0.00 140 2.3 1.3 ND<0.5 3.5 --- 10/13/91 98.44 10.81 87.63 0.00 -- -- --- --- --- --- 10/20/91 98.44 11.15 87.29 0.00 --- --- --- --- --- 4/9/92 98.44 14.93 83.53* 0.03 48,000 430 4,400 1,400 9,200 --- 7/10/92 98.44 12.88 85.56 0.00 45,000 57 1,200 740 7,300 --- 1/7/93 -- 1/7/93 98.44 16.32 82.95* 0.11 --- --- --- --- --- --- 4/7/93 98.44 15.58 82.94* 0.11 -- --- --- --- 12/30/93 --12/30/93 98.44 14.98 83.60* 0.18 -- --- --- --- --- 3/9/94 98.44 15.98 82.59* 0.17 --- -- -- --- --- --- -8/-l-/94 -- -8/1/94 98:44 11.00 --87-44- --- -3/7/95 - 98.44 .16.76 .-.81.81* 0.16 --- --- --- --- --- --- 10/19/95 98.44 14.42 84.07* 0.07 -- -- -- -- --12/19/95 98.44 15.90 82.61* 0.10 --- 1/5/96 98.44 16.13 82.33* 0.03 6,600 ND<6.2 ND<6.2 ND<6.2 920 66 MW-2 9/4/91 99.04 10.12 88.92 0.00 6,400 710 700 130 1,300 -- i 10/13/91 99.04 11.22 87.82 0.00 --- --- --- --- --- --- 10/20/91 99.04 11.65 87.39 0.00 --- -- --- --- --- =-= 4/9/92 99.04 15.29 83.75 0.00 2,400 1,400 720 59 250 7/10/92 99.04 13.33 85.71 0.00 8,800 3,300 1,400 86 980 --- 1/7/93 99.04 -15.99 83:05 0.00 --- - --- --- -- --- 4/7/93 99.04 16.20 82.84 0.20 --- --- --- --- --- --- 12/30/93 99.04 15.31 83.73 sheen 14,000 1,000 730 520 1,400 --- 3/9/94 99.04 16.33 82.71 0.01 --- --- --- --- --- I 8/1/94 99.04 11.75 87.29 0.00 --- --- -- --- --- . 3/7/95 99.04 16.91 82.13 droplets -- --- - -- -- --- 10/19/95 99.04 14.86 84.18 0.00 31,000 3,400 1,800 560 2,300 .1,200 12/19/95 99.04 16.29 82.75 0.00 --- --_ --- -- --- --- 1/5/96 99.04 16.61 82.43 sheen 6,500 88 ND<6.2 ND<6.2 870 1,000 I 1 of 4