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TABLE 4 HISTORICAL ANALYTICAL RESULTS OF GROUND WATER SAMPLES ' EPA METHODS 8015M/8020 Former Chase Chevrolet (Madison) Facility 423 North Madison Street, Stockton, California ' (µgd) ' ple Sample Depth TPH-g TPH-d TPH-mo MTBE Benzene "Toluene Ethyl- Location Xylenes (screen ©ate Water benzene ' MW-12 10-05-95 23 12 110 220 <250 ___ <05 1 2 <0 5 <0 5 (17-37) 02-08-96 2293 <50 <50 <250 <05 <05 <0 5 <05 05-07-96 2115 <50 <50 <250 <5 0 <0 5 <05 <0 5 <0 5 08-07 96 2070 <50 <50 <250 <50 <0 5 <05 <0 5 <05 ' 11-05 96 21 30 <50 <50 <250 <50 <0 5 <05 <0 5 <0 5 02-04-97 1626 <50 76 <250 <50 <0 5 <05 <0 5 <0 5 05-06 97 18 57 <50 <50 <250 <50 <0 5 <05 <0 5 <05 08-05 97 1843 <50 <50 <250 <5 0 <0 5 <05 <0 5 <05 ' 11-04 97 1925 <50 <50 <250 <50 <0 5 <05 <0 5 <05 02-04 98 1582 <50 66 <250 <50 <0 5 <05 <0 5 <05 02-02 99 1564 <50 <50 <250 <5 0 <0 5 059 <0 5 <05 02-0800 1599 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 05-0900 1428 --- --- --- --' --- --- — 08-21-00 15 10� <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <0 5 11-28-00 1642 02-28-01 1579 --- --- --- - --- --- 05-21-01 1571 <50 <50 <250 <50 <0 5 <0 5 <0 5 <05 ' • 0 -16-01 1633 -- - 111-14-01 1742 --- --- --- --- --- 02-13-02 1663 --- --- --- -- --- - -- ' MW-13 10-05-95 2341 <50 <50 <250 ___ <0 5 <05 <0 5 <05 (17-37) 02-08-96 23 19 <50 <50 <250 <0 5 <0 5 <0 5 <05 05-07-96 21 48 90 85 <250 <50 <0 5 <0 5 <05 <05 08-07-96 21 00 240 130 <250 65 <0 5 <0 5 <0 5 060 ' 11-05-96 21 63 280 <50 <250 <50 14 <05 <0 5 13 02-04-97 1640 <50 <50 <250 <50 <0 5 <0 5 <0 5 <0 5 05-06-97 1893 <50 55 <250 <50 <0 5 <0 5 <0 5 <05 M5 97 1820 <50 64 <250 <50 <0 5 <0 5 <05 <0 5 11-04-97 1960 <50 130 <250 <5 0 <0 5 <0 5 <0 5 073 ' 02-04-98 15 85 <50 <50 <250 <50 <0 5 <0 5 <05 <05 05-07-98 1449 120 170 <250 <50 056 <0 5 <0 5 <05 08-12-98 1449 <50 69 <250 --- <0 5 <0 5 <05 <05 11-03-98 16 49 53 74 <250 <50 <0 5 <0 5 <0 5 <0 5 ' 02-02-99 1603 <50 57 <250 <50 <0 5 <0 5 <05 <0 5 05-05-99 15 27 <50 <50 <250 <50 058 23 <05 39 08-11-99 1566 110 100 <250 <50 079 095 <0 5 2 2 11-09-99 1692 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <05 ' 02-08-00 1638 <50 <50 <250 <50 <0 5 <05 <0 5 <0 5 05-09-00 1467 <50 <50 <250 <50 <0 5 <0 5 <05 <0 5 08-21-00 15 53 72 <50 <250 <50 <0 5 <0 5 052 22 11-28-00 1685 <50 51 <250 <50 <0 5 <0 5 <0 5 <0 5 02-28-01 1618 <50 <50 <250 <5 0 <0 5 <0 5 <0 5 <05 ' 05-21-01 16 11 <50 <50 <250 <50 <0 5 <0 5 <0 5 <05 08-16-01 1671 130 68 <250 <50 066 <0 5 <0 5 <05 11-14-01 1784 <50 <50 <250 <50 <0 5 <0 5 <0 5 <05 02-13-02 1 17_06 <50 1 <50 1 <250 1 <50 1 <0 S 1 <0 5 1 <0 5 <05 i . ' Advanced GeoEnwronmental,Inc