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i <br /> TABLE 1 (CONT ) — Summary of Groundwater Analytical Results (mg/L) <br /> Thrifty Oil Co Station #172 <br /> 7647 Pacific Avenue j <br /> Stockton, California <br /> WELL DATE DTW TPH Benzene Toluene E—benzene Xylenes _MTBE _ <br /> MW-3 06/06/91 5663 NA 850 924 165 2570 NA <br /> 06/03/92 5606 1100 34 ND ND ND NA <br /> 08/05/92 5740 700 66 17 ND 47 NA <br /> 11/24/92 5705 1400 720 69 ND 120 NA <br /> 02/24/93 5375 9700 1800 790 210 1000 NA i <br /> 05/20/93 5285 35000 8000 7400 290 6200 NA <br /> 09/09/93 5483 20000 3200 1000 400 2300 NA <br /> 11/30/93 5258 8000 1400 270 150 610 NA <br /> 02/23/94 4833 63000 5600 3600 1400 5900 NA <br /> 05/31/94 4772 100000 9200 11000 3000 13000 NA <br /> 08/15/94 5034 62000 4500 5200 1000 6700 NA <br /> 11/08/94 51 12 570 26 43 94 35 NA <br /> 02/08/95 4829 72000 5400 6400 2700 9900 NA <br /> 05/09/95 4662 FP SHEEN NA <br /> 08/08/95 4768 73000 4600 7100 2400 12000 NA <br /> 02/29/96 5746 26000 1200 3000 1600 6000 ND <br /> 05/29/96 51 30 11000 580 510 570 2200 75 <br /> 08/14/96 4350 _26000 1200 _ 1500 -- -- 830 4700 <1000 j <br /> MW--4 06/06/91 5763 NA 364 ND ND 19 NA� <br /> 06/03/92 5730 ND 1 ND ND ND NA <br /> 08/05/92 5840 ND ND ND ND 06 NA <br /> 11/24/92 5802 ND ND ND ND ND NA <br /> 02/24/93 5468 320 40 91 ND 27 NA <br /> 05/20/93 5380 ND ND ND ND ND NA <br /> i <br /> 09/09/93 5580 ND ND ND ND ND NA <br /> 11/30/93 5355 ND ND ND ND ND NA <br /> 02/23/94 4930 ND ND ND ND ND NA <br /> 05/31/94 4772 ND ND ND ND ND NA <br /> 08/15/94 5137 ND ND ND ND ND NA <br /> 11/08/94 5204 ND ND ND ND ND NA <br /> 02/08/95 4923 ND ND ND ND ND NA <br /> 05/09/95 4758 ND ND ND ND ND NA <br /> 08/08/95 4873 ND ND ND ND ND NA <br /> 02/29/96 6230 ND ND ND ND ND ND <br /> 05/29/96 4280 ND ND ND ND 18 ND <br /> 08/14/96 _44 75 _ N_D ND ND ND ND ND <br /> THPg — Total Petroleum Hydrocarbons by EPA 8015 1 <br /> ug/L --- micrograms per liter on parts per billion <br /> ND — Not Detected, TPHg @ 2 mg/L, BTEX @ 0 5 ug/L <br /> NA — Data Not Available <br /> DTW — Depth to Water below grade <br />