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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through November 2004 76 Station 5886 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water in 8260B benzene Xylenes 802113 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg11) (µg11) (µg11) (µg/l) (µg/1) (µg11) (µg/1) MW-2 continued 11/19/01 -030 6 57 000 -687 0 45 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 3500 4000 12/13/01 -030 6 18 000 -648 039 - -- -- - -- -- 6500 01/18/02 -030 5 69 000 -599 049 -- -- -- -- - -- 7200 -- 02/11/02 -030 622 000 -652 -053 ND<1 000 ND<i0 ND<10 ND<10 ND<10 4800 4600 03/21/02 -030 6 05 0 00 -635 0 17 -- - -- -- -- 150 -- 05/23/02 -030 6 15 000 -6 45 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<0 50 41 28 08/01/02 -030 658 000 -6 88 -043 ND<100 - ND<1 0 ND 11/20/02 -030 643 000 -673 0 15 ND<250 -- ND<2 5 ND<2 5 ND<2 5 ND<5 0 -- 290 02/20/03 -030 623 000 -653 020 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<1 0 28 05/07/03 -030 551 000 -5 81 072 ND<50 - ND<0 50 ND<0 50 0 55 ND<l 0 -- 150 08/04/03 -030 666 000 -6 96 -1 15 -- 68 ND<5 0 ND<5 0 ND<5 0 ND<t 0 - 120 11/20/03 -030 6 11 000 -641 055 -- 97 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 120 02/11/04 -030 5 85 000 -6 15 026 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 - 57 05/27/04 -030 6 05 000 -635 -020 -- 100 ND<0 50 1 2 ND<0 50 1 4 -- 61 08/30/04 -030 6 21 000 -651 -016 97 -- ND<0 5 ND<0 5 ND<0 5 ND<l 67 11/23/04 -030 5 74 000 -6 04 047 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 - 19 MW-3 (Screen Interval in feet 5 0-25 0) 09/06/96 -014 8 16 000 -830 - -- - -- _ -- 09/09196 -014 8 10 000 -8 24 0 06 - -- -- -- -- -- 4100 - 12/06/96 -014 669 000 -6 83 141 -- -- -- -- 660 -- 03/07/97 -014 598 coo -6 12 0 71 -- -- -- -- -- 16000 20000 05/02/97 -065 660 000 -725 -1 13 -- - 3 2 -- -- 7900 8000 09/02/97 -065 8 56 0 00 -9 21 -196 -- -- -- - -- 2100 -- 12/01/97 -0 65 7 05 000 -770 151 -- - -- - -- 1700 - 5886 Page 4 of 28