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TABLE I <br /> HISTORICAL GROUNDWATER DATA <br /> Former Discovery Chevrolet <br /> 161511th Street <br /> Tracy, California <br /> Well. No./ Date Total Depth to Groundwater Floating Chlorinated <br /> Elev.' Sampled Depths Waterl Elevation Product TPHg Benzene Toluene Ethylbenzene Xylenes METBE TPHd O&G Halocarbons <br /> (ft.) (ft.) (ft.) (ft.) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> MW-11 09/16/94 20.0 9.97 35.03 ---- 640 35 40 6.8 72 na na na na <br /> 45.00 03/08/95 20.0 10.05 34.95 ---- 3,900 730 510 140 430 na na na na <br /> 05/17/95 20.0 10.02 34.98 ---- 400 120 36 12 43 na na na na <br /> 08/07/95 20.0 10.98 34.02 ---- 1,400 250 170 64 170 na na na na <br /> 12/20/95 20.0 9.86 35.14 ---- 17,000 3,100 2,000 670 2,400 na na na na <br /> 02/20/96 20.0 9.25 35.75 ---- 3,300 880 310 230 390 na na na na <br /> 05/13/96 20.0 9.94 35.06 ---- 5,800 980 510 320 730 na na na na <br /> 08/13/96 20.0 10.83 34.17 ---- 100 20 17 7.9 18 <5 na na na <br /> 11/21/96 20.0 9.87 35.13 ---- 510 190 31 22 89 13 na na na <br /> 03/18/97 20.0 9.73 35.27 ---- <50 4.0 1.1 0.5 1.8 <5 na na na <br /> 06/12/97 20.0 9.97 35.03 ---- 1,500 310 120 110 380 12 na na na <br /> 09/17/97 20.0 10.12 34.88 ---- 80 8.5 1.8 5.4 14 <5 2 na na na <br /> 12/18/97 20.0 9.81 35.19 ---- 230 83 5.1 9.6 30 <52,4 na na na <br /> 03/06/98 20.0 9.15 35.85 ---- 270 47 7.4 26 53 5 na na na <br /> 06/05/98 20.0 9.73 35.27 ---- 80 10 1.9 4.9 12 <5 na na na <br /> MW-2/ 09/16/94 19.5 10.07 34.91 ---- 7,600 370 180 260 680 na na na na <br /> 44.98 03/08/95 19.5 10.12 34.86 ---- 1,000 180 47 57 180 na na na na <br /> 05/17/95 19.5 10.08 34.90 ---- 100 37 11 5.5 21 na na na na <br /> 08/07/95 19.5 10.89 34.09 ---- 60 10 3 2 9 na na na na <br /> 12/20/95 19.0 9.98 35.00 ---- 9,700 1,000 150 480 1,100 na na na na <br /> 02/20/96 19.5 9.62 35.36 ---- 8,600 800 150 430 1,000 na na na na <br /> 05/13/96 19.5 10.04 34.94 ---- 8,200 740 160 390 1,200 na na na na <br /> 08/13/96 19.5 10.95 34.03 ---- <50 1.1 0.8 0.7 2.8 <5 na na na <br /> 11/21/96 19.5 9.97 35.01 ---- <50 4.7 1.6 1.5 7 <5 na na na <br /> 03/18/97 19.5 9.87 35.11 ---- 90 8.7 1.2 3.4 10 <5 na na na <br /> 06/12/97 19.5 10.08 34.90 ---- 2,400 240 39 150 450 15 na na na <br /> 09/17/97 19.5 10.23 34.75 ---- 250 4,1 <0.5 1.3 5 63 na na na <br /> Refer to page 3 for Explanation. <br /> 8146.04-5 Page 1 of 3 <br />