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i TABLE 3 HISTORICAL ANALYTICAL RESULTS OF GROUND WATER SAMPLES ' EPA METHODS 8015M, 8020, 80213 Former Chase Chevrolet (Van Buren) Facility 424 North Van Buren Street, Stockton, California ' (µg/1) ' Sample Sample Depth to TP14 as Ethyl Location Date Water Gasoline MTBE Benzene Toluene benzene Xylene (Screen) ' MW-17 11-20-95 2472 <50 NA <0 5 <0 5 <0 5 <0 5 (16-36) 02-09-96 24 13 <50 NA <0 5 <0 5 <0 5 <0 5 05-08-96 21 98 <50 <5 0 <0 5 <0 5 <0 5 <0 5 ' 08-08-96 2170 <50 70 <0 5 <0 5 <0 5 <0 5 11-06-96 22 12 <50 <5 0 <0 5 <0 5 <0 5 <0 5 02-05-97 1787 <50 <5 0 <0 5 <0 5 <0 5 <0 5 05-07-97 19 10 <50 <5 0 <0 5 <0 5 <0 5 <0 5 ' 08-06-97 1924 <50 <5 0 <0 5 <0 5 <0 5 <0 5 11-05-97 1992 <50 <5 0 <0 5 <0 5 <0 5 <0 5 02-05-98 1755 <50 <5 0 <0 5 <0 5 <0 5 <0 5 ' 05-08-98 1476 <50 <5 0 <0 5 <0 5 <0 5 <0 5 09-13-98 15 10 <50 <5 0 <0 5 <0 5 <0 5 <0 5 11-04-98 1662 <50 <5 0 <0 5 <0 5 <0 5 <0 5 02-03-99 16 14 <50 <5 0 <0 5 076 <0 5 14 • 05-05-99 1521 330 <5 0 11 47 15 67 08-10-99 1576 <50 <5 0 <0 5 059 <0 5 099 11-10-99 1675 <50 <5 0 <0 5 <0 5 <0 5 <0 5 02-09-00 15 39 200 <5 0 061 26 13 43 05-11-00 1460 <50 <1 0 <0 5 <0 5 <0 5 <0 5 08-22-00 1549 <50 <5 0 <0 5 <0 5 <0 5 11 11-28-00 1658 <50 <5 0 <0 5 <0 5 <0 5 <0 5 02-28-01 1622 <50 <5 0 <0 5 067 <0 5 1 1 05-21-01 1606 <50 <5 0 <0 5 <0 5 <0 5 <0 5 08-16-01 16 85 <50 <5 0 <0 5 <0 5 <0 5 <0 5 11-14-01 1773 <50 <50 <05 <05 <05 <05 02-13-02 1679 <50 <5 0 <0 5 058 <0 5 <0 5 05-16-02 1693 <50 <5 0 <0 5 <0 5 <0 5 N S 09-30-02 1812 NS NS NS NS NS NS 12-02-02 1862 NS NS NS NS NS NS ' MW-22 05-21-01 1508 470 <5 0 64 74 98 86 (10-30) 08-16-01 1572 <50 <5 0 <0 5 <0 5 <0 5 <0 5 11-14-01 1671 1 <50 <5 0 <0 5 <0 5 <0 5 <0 5 02-13-02 1571 <50 <5 0 <0 5 <0 5 <0 5 <0 5 05-16-02 1590 210 <5 0 057 <0 5 1 1 48 09-30-02 1695 <50 <5 0 <0 5 <0 5 <0 5 <0 5 12-02-02 1 1744 <50 1 <5 0 1 <0 5 1 <0 5 <0 5 <0 5 ' Advanced GeoEnvtronmental,7ne