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TABLE 4 HISTORICAL ANALYTICAL RESULTS OF GROUND WATER SAMPLES ' EPA METHODS 801 5M/8020 Former Chase Chevrolet (Madison)Facility 423 North Madison Street, Stockton, California Ethyl- Location ple Sample Depth tobenzene TPH-g TPH-d TPH-mo MTBE Benzene Toluene Ethyl Xylenes Date (screen) Water M W 5 01-10-91 2725 <50 --- --- --- <0 5 <0 5 <0 5 06 ' (20?-45) 02-27-92 2832 <50 --- --- --- <0 5 <0 5 <05 <05 ; 05-28-92 2830 <50 --- --- --- <0 5 <0 5 <05 <05 09-16-92 2954 <50 --- <05 <0 5 <0 5 <05 ' 11-05-92 2889 <50 --- -- <05 <0 5 <05 <05 02-11-93 2848 <50 <05 <0 5 <05 <05 02-08-94 2774 <50 <05 <0 5 <05 <05 05-04-94 2769 <50 --- --- --- <05 <0 5 <0 5 <05 0805-94 2701 120, --- --- --- <05 060 <05 <05 ' 12-20-94 2794 <50 --- --- --- <05 <0 5 <0 5 <05 05-11-95 2437 <50 <05 <0 5 073 48 10-05-95 2339 <50 --- --- --- <05 <0 5 <0 5 1 8 01-30-96 2362 110 <50 <250 --- <05 <0 5 21 40 ' 02-08-96 23 19 <50 <50 <250 --- <05 <0 5 <0 5 <05 V 05-07-96 2145 63 52 <250 <50 <05 <0 5 <0 5 10 08-07-96 2098 140 100 <250 54 <05 <0 5 090 19 11 05-96 21 62 190 130 <250 <5 0 <05 <0 5 1 0 20 02-04-97 1653 170 210 <250 <50 <05 <0 5 <0 5 22 ' 05-06-97 1886 55 89 <250 <5 0 <05 <0 5 <05 54 08-05-97 1971 <50 71 <250 <5 0 <05 <0 5 <05 <0 5 11-04-97 1953 <50 79 <250 <5 0 <05 <0 5 <05 <0 5 02-04-98 1600 <50 <50 <250 <5 0 <05 <0 5 <05 <05 ' 02-02-99 1593 <50 <50 <250 <5 0 <05 <0 5 <05 <05 02-08-00 1626 <50 <50 <250 <50 <05 <0 5 <05 <05 05-09-00 1460 --- --- --- --- --- --- --- --- 08-21-00 1538 --- --- --- - --- --- --- --- 11-28-00 1072 --- --- --- --- ' 02-28-01 1606 --- --- --- --- --- --- --- 05-2I-01 155 96 <50 <55 0 <250 <5 0 <05 <0 5 <05 <05 08-16-01 1656 11-14-01 1770 -- --- --- --- --- 02-13-02 16 94 --- --- -- 1 i ' Advanced GeoEnviron mental,Inc