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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS February 1990 Through June 2005 Former 76 Station 6981 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 8021 B 8260E Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (pg/1) (µg/1) (µg/1) (µg/1) (µg/1) (µg11) (µg/1) I MW-9 contmued 01/24/96 1176 42 74 -- -3098 2 80 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- -- 04/25/96 1176 37 78 -- -2602 496 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<40 -- 07/24/96 1176 3829 -- -2653 -051 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 -- 10/23/96 1176 40 18 -- -2842 -189 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 -- 01/20/97 1176 36 17 -- -2441 4 01 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 -- 07/16/97 1176 33 84 -- -2208 233 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 -- 10/15/97 1176 3575 -- -2399 -191 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 ND<2 0 12/08/97 1 1 76 35 78 -- -2402 -003 03/05/98 1176 3080 -- -1904 498 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 05/27/98 11 76 27 67 -- -1591 3 13 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 07/21/98 11 76 2791 -16 15 -024 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 10/14/98 11 76 2899 -1723 -108 ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 01/25/99 11 76 2822 -1646 077 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 04/19/99 11 76 25 73 -1397 249 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 07/15/99 1176 2713 -- -1537 -140 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 10/25/99 1176 2882 -- -1706 -169 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 01/27/00 11 76 2846 - -1670 036 ND<50 -- ND<O 50 1 6 ND<O 50 2 2 ND<2 5 ND<2 0 06/26/00 11 76 2560 -- -13 84 2 86 ND<50 0 -- ND<O 500 ND<O 500 ND<O 500 ND<O 500 ND<5 0 2 04 09/22/00 1176 28 17 -- -1641 -257 ND<50 - 1 9 2 3 ND<O 50 2 3 3 5 3 4 12/26/00 11 76 2819 -- -1643 -002 ND<50 0 ND<O 500 ND<O 500 ND<O 500 ND<O 500 ND<5 0 2 35 03/07/01 11 76 2791 -- -16 15 028 ND<50 0 -- ND<O 500 ND<O 500 ND<O 500 ND<O 500 ND<5 0 3 2 06/26/01 11 76 28 82 -- -1706 -091 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 09/12/01 1176 3072 - -1896 -190 ND<50 -- 094 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 12/12/01 1176 3108 -- -1932 -036 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND fi9e� Page 20 of 37