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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 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/l) (µg/1) (µg11) (µg11) (µg/1) (µg/1) (µg/1) (µg11) MW-8 continued 07/16/97 1038 3247 000 -2209 270 ND<50 - ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 -- 10/15/97 1039 -- -- -- -_ -- -- -- -- -- -- - Inaccessible 12/08/97 1038 -- -- -_ __ -_ _- _ Inaccessible 03/05/98 1038 3007 0 00 -1969 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<2 5 ND<2 0 05/27/98 1038 2661 0 00 -1623 346 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<2 5 ND<2 0 07/21/98 1038 2665 0 00 -1627 -0 04 73 -- 093 4 072 4 3 13 8 9 10/14/98 1039 2757 0 00 -1719 -092 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<2 5 ND<2 0 01/25/99 1038 2683 000 -1645 074 ND<50 -- ND<0 50 ND<0 50 ND<0 50 1 ND<2 5 ND<2 0 04/19/99 1038 2451 000 -14 13 232 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 12 7 8 07115/99 1038 2573 000 -1535 -122 ND<50 ND<0 50 0 6 ND<0 50 ND<0 50 ND<2 5 31 10/25/99 1038 2741 000 -1703 -168 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<0 50 2 5 ND<2 0 01/27/00 1038 2701 0 00 -1663 040 ND<50 -- ND<0 50 0 82 ND<0 50 087 ND<2 5 ND<2 0 06/26/00 1038 24 19 000 -13 81 2 82 ND<50 0 -- ND<O 500 0 819 ND<0 500 0 853 ND<5 0 ND<2 0 09/22/00 1038 2664 000 -1626 -245 ND<50 - ND<0 50 093 ND<0 50 1 1 ND<2 5 ND<2 0 12/26/00 1038 2666 000 -1628 -002 ND<50 0 -- ND<o 500 ND<0 500 ND<0 500 ND<o 500 ND<5 0 ND<2 0 03/07/01 1038 2641 0 00 -1603 025 ND<50 0 -- ND<0 500 ND<o 500 ND<0 500 ND<0 500 ND<5 0 ND<2 0 06/26/01 10 38 2732 000 -1694 -091 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 09/12/01 1038 29 17 000 -1879 -185 ND<50 -- ND<0 50 12 ND<0 50 099 ND<5 0 ND<2 0 12/12/01 1038 2949 000 -1911 -032 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<l 0 03/20/02 1038 2834 0 00 -1796 1 15 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 06/06/02 1038 28 74 000 -1836 -040 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 09/30/02 1038 31 17 000 -2079 -243 -- 120 4 4 65 4 4 16 ND<2 0 12/30/02 1038 3077 000 -2039 040 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 03/29/03 1039 2984 000 -1946 093 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND seal Page 18 of 37