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M M mm IM M Mir IM TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3942,4444 NORTH PERSHING AVENUE,STOCKTON,CALIFORNIA Casing Depth Groundwater LPH Concentration ( L) Well Elevation to Water Elevation Thickness Ethyl- Number Date (feet) (feet) (feet) _ (feet) Benzene Toluene benzene Xylenes TPH-g MTBE M W l 11/04/96 776 21 77 -1401 0 00 <0 5 <0 5 <0 5 <0 5 120b <2 5 M W 1 02/03/97 776 1700 -924 000 <0 5 <0 5 <0 5 <0 5 826 <2 5 MWI 05/08/97 643 1690 -1037 000 <0 5 <0 5 <0 5 <0 5 <50 <2 5 MWI 08/26/97 643 1858 -12 15 000 -- -- -- -- __ -- MWI 11/11/97 643 19 15 -1272 000 -- -- -- -- _ MW1 03/03/98 643 1330 -687 000 MWI 05/20/98 643 1348 -705 000 MWI 08/19/98 643 1492 -849 000 -- -- -- -- -- -- MWI 11/18/98 643 1534 -891 000 <05 <05 <05 <05 <50 <25 M W 1 03/30/99 643 -- -- -- -- __ __ __ __ MW 1 05/05/99 643 13 88 -745 000 <0 5 <0 5 <0 5 <0 5 <50 <2 0 MWI 08/20/99 643 1526 -8 83 000 -- -- -- -_ __ -- MWI _MW1 12/06/99 643 1542 -899 000 MWI 02/29/00 643 -- -- __ MW1 05/16/00 643 13 19 -676 000 -- -- -- -- __ __ MW 1 09/11/00 643 1544 -9 01 000 <0 5 <0 5 <0 5 0 71 <50 <0 5 MWI 12/13/00 643 1538 -895 000 <0 5 <0 5 <0 5 071 <50 <0 5 MWl 03/08/01 643 -- -- -_ __ __ __ __ MW 1 06/21/01 643 1586 -943 000 <0 5 <0 5 <0 5 <0 5 <50 <0 5 MW 1 09/20/01 6 43 1693 -1050 000 -- -- -- -- __ __ MW l 12/04/01 638 1671 -1033 000 -- -- -- -- __ -- MWI 03/05/02 638 1600 -962 000 <0 5 <0 5 <0 5 <0 5 <50 h <0 5 MW1 06/11/02 638 1649 -10 11 000 -- -- -- __ __ -- MWI _MW1 09/10/02 638 1750 -11 12 000 -- -- -- _- __ MWI 12/18/02 638 1726 -1088 000 -- -- -- -- __ -- MWI _MW1 03/24/03 638 1695 -1057 000 <0 5 <0 5 <0 5 <0 5 <50 h <50 M W 1 06/11/03 638 1691 -10 53 000 -- -- -- -- -_ -- MW2 01/87 877 -- -- -- 26 190 -- 1,100 11,000 -- MW2 07/16/87 877 1880 -1003 000 68 26 630 1,320 4,800 - MW2 04/11/88 877 2189 -13 12 000 94 <20 240 880 11,000 -- MW2 09/13/88 877 2432 -1555 000 600 62 520 1,900 7,400 -- g1projects1739421masterlwp1g0603%3942g^v As Page 4 of 48