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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through February 2005 76 Station 5886 i Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water in 8260E benzene Xylenes 8021E 8260E Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg/1) (µg11) (µg11) (pg/1) (µg11) (µg/1) MW-5D continued 03/25/98 0 18 596 000 -578 2 01 ND - ND ND ND ND ND ND 06/17/98 0 18 699 000 -681 -103 ND -- ND 061 ND 055 ND ND 09/01/98 0 11 7 89 000 -771 -090 ND -- ND ND ND ND ND ND 12/03/98 018 7 13 000 -695 076 ND -- ND ND ND ND 32 2 7 03/01/99 018 5 97 000 -5 79 1 16 ND -- ND ND ND ND ND ND 04/19/99 065 6 81 000 -6 16 06/01/99 0 65 7 63 000 -698 -082 ND -- 52 ND ND ND ND ND 08/16/99 065 796 000 -731 -033 ND -- ND ND ND ND ND ND 11/29/99 065 778 000 -7 13 0 18 ND - ND ND ND ND ND 4 7 D 11/29/99 065 778 000 -7 13 000 02/28/00 065 4 64 000 -399 3 14 ND -- ND ND ND ND ND ND 05/10/00 065 681 000 -6 16 -217 ND ND .ND ND ND ND ND 08/03/00 065 773 000 -708 -092 ND - ND ND ND ND ND ND 11/16/00 065 7 11 000 -646 062 ND -- ND ND ND ND ND ND 02/05/01 065 6 80 000 -6 15 031 ND -- ND ND ND ND ND ND 05/07/01 065 6 80 000 -6 15 -- ND -- ND ND ND ND ND ND 08/20/01 065 797 000 -732 - ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 11/19/01 065 747 000 -682 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<l 0 02/11/02 065 7 08 000 -643 - ND<50 -- ND<0 50 064 ND<0 50 ND<0 50 -- ND<2 0 05/02/02 065 709 000 -644 - ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 08/01/02 065 748 000 -683 -039 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 11/20/02 065 732 000 -667 0 16 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 02/20/03 0 65 7 10 000 -645 022 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 05/07/03 065 6 27 -- -562 0 83 -- -- -- .- -- -- -- -. Sampled Semi-Annually 5886 Page I 1 of 30