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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through August 2005 76 Station 5886 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Continents Sampled Elevation Water Thickness water in 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg11) (µg11) (µg/1) (µg11) (µg11) (µfill) MW-1 (Screen Interval in feet.5.0-25.0) 09/06/96 -084 745 000 -829 -- -- -- -- -- -- -- -- 09/09/96 -084 758 000 -842 -0 13 ND -- ND ND ND ND 230 -- 12/06/96 -084 645 000 -729 1 13 ND -- ND ND ND ND 90 -- 03/07/97 -084 5 83 000 -667 062 ND -- ND ND ND ND 110 -- 05/02/97 -135 624 000 -759 -092 ND -- ND ND ND ND 140 -- 09/02/97 -135 828 000 -963 -204 ND -- ND ND ND ND 530 -- 12/01/97 -135 6 73 000 -808 155 ND -- ND ND ND ND 40 -- 03/25/98 -135 5 13 000 -648 160 ND -- ND ND ND ND 66 69 06/17/98 -135 594 000 -729 -081 ND -- ND ND ND ND ND ND 09/01/98 -135 658 000 -793 -064 ND -- ND ND ND ND ND ND 12/03/98 -135 6 13 000 -748 045 ND ND ND ND ND 130 110 03/01/99 -135 534 000 -669 079 ND -- ND ND ND ND 520 530 04/15/99 -084 5 89 000 -6 73 -004 -- -- -- -- -- -- -- — 06/01/99 -084 634 0 00 -718 -0 45 ND -- ND ND ND ND 230 290 08/16/99 -084 668 000 -752 -034 ND -- ND ND ND ND 64 80 11/29/99 -084 658 000 -742 010 ND -- ND ND ND ND 33 45 D 11/29/99 -084 658 000 -742 010 -- -- -- -- -- 02/28/00 -084 450 000 -534 2 08 ND -- ND ND ND ND 690 760 05/10/00 -084 583 000 -667 -133 ND -- ND ND ND ND 138 171 08/03/00 -084 656 000 -740 -073 ND -- ND ND ND ND 1280 1910 11/16/00 -084 6 12 000 -696 044 ND -- ND ND ND ND 1500 1700 02/05/01 -084 597 000 -681 015 ND -- ND ND ND ND 2930 3700 04/30/01 -084 583 000 -667 014 -- -- -- -- -- -- -- 2730 j 05/07/01 -084 587 000 -671 -004 ND -- ND ND ND ND 3200 3310 5886 Page I of 32