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1 TABLE 4 <br /> HISTORICAL ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> ' EPA METHODS 8015M/8021 <br /> Former Chase Chevrolet (Madison)Facility <br /> 423 North Madison Street, Stockton, California <br /> ' (µg/1) <br /> Sample Location Sample Depth <br /> TPH-g TPH-d TPH-mo MTBE Benzene Toluene Ethyl- Xylene <br /> screen Date Water benzene <br /> MW l 01-10-91 2578 1,000 NA NA NA 67 91 23 110 <br /> (19-46) 02-27-92 2732 5,800 NA NA NA 33 220 41 180 <br /> 05-28-92 2823 1,200 NA NA NA 22 48 16 73 <br /> 09-16-92 2825 4,300 NA NA NA 110 330 100 400 <br /> ' 11-05-92 2844 370 NA NA NA 83 29 11 63 <br /> 02-11-93 2890 3,100 NA NA NA 41 110 49 230 <br /> 02-08-94 2838 1,900 NA NA NA 68 120 130 460 <br /> 05-04-94 2764 3,900 NA NA NA 140 230 230 870 <br /> 08-05-94 2728 2,400 NA NA NA 90 240 120 680 <br /> 12-2094 2686 3,000 NA NA NA 63 80 150 660 <br /> 05-11-95 2782 560 NA NA NA 13 37 25 140 <br /> 10-05 95 2416 280 NA NA NA 63 18 13 70 <br /> 01-30-96 2320 490 100 <250 NA 10 30 69 120 <br /> ' 02-08-96 2345 170 <50 <250 NA 21 97 39 46 <br /> 05-07-96 2128 2,000 490 180 97 25 25 <0 5 570 <br /> 08-07-96 2080 330 320 <250 <5 0 23 83 67 84 <br /> 11-05-96 2146 1,300 220 <250 <50 16 60 41 390 <br /> 02-04-97 1633 850 300 <250 <5 0 97 25 71 230 <br /> . 05-06-97 1872 340 200 <250 <5 0 1 5 054 18 18 <br /> 08-05-97 1852 65 <50 <250 <5 0 <0 5 <0 5 66 47 <br /> 11-04-97 1936 <50 90 <250 <5 0 <0 5 <0 5 <0 5 080 <br /> 02-04-9S 1576 450 200 <250 <5 0 40 60 17 120 <br /> ' 05-07-98 1432 <50 66 <250 <5 0 <0 5 <0 5 095 060 <br /> 09-12-98 1474 <50 <50 <250 NA <0 5 <0 5 <0 5 <0 5 <br /> 11-03-98 1852 <50 65 <250 <5 0 <0 5 053 <0 5 <0 5 <br /> 02-02-99 1578 <50 <50 <250 <5 0 <0 5 0 58 13 16 <br /> 05-05-99 1495 350 <50 <250 <5 0 19 54 14 65 <br /> t 08-11-99 15 33 52 <50 <250 <5 0 053 19 1 5 61 <br /> 11-09-99 1662 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 <br /> 02-08-00 1620 <50 <50 <250 <5 0 <0 5 <0 5 089 20 <br /> 05-09-00 1460 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 <br /> 08-21-00 - <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 <br /> 11-28-00 1641 <50 <50 <250 <5 0 <0 5 <0 5 1 2 <0 5 <br /> 02-28-01 1592 <50 <50 <250 <50 <0 5 <0 5 057 054 <br /> 05-21-01 1579 <50 <50 <250 <50 <0 5 <0 5 <0 5 <0 5 <br /> 08-16-01 1636 <50 <50 <250 <50 <0 5 <0 5 <0 5 <0 5 <br /> ' 11-14-01 1754 <50 <50 <250 <50 <0 5 <0 5 <0 5 <0 5 <br /> 02-13-02 1683 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 <br /> 05-16-02 1682 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 <br /> 09-30-02 17 72 1 NS NS NS NS NS NS NS NS <br /> • <br /> ' Advanced GeoEnvironmental,Inc <br />