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i Table 2 - HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through June 2005 76 Station 5886 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Sampled Elevation Water Thickness water M 82608 Comments Elevation Elevation benzene Xylenes 802113 82608 (feet) (feet) (feet) (feet) (feet) (µgll) (µg11) (µg11) (µg/1) /1 (µg ) (µS11) (N$11) (µg/1) MW-7D continued 02/23/05 2 76 797 000 -521 060 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 46/06/05 276 838 000 -562 -041 __ __ -- ND<0 50 -- -- Sampled semi-annually MW-7S (Screen Interval to feet 7 0-17 0) 05/02/97 2 36 937 0 00 -701 __ ND ND ND ND ND ND 09/02/97 236 1143 000 -907 -2 06 ND ND ND ND ND ND 12/01/97 2 36 987 000 -7 51 1 56 ND - ND ND ND ND ND 03/25/98 236 790 0 00 -554 1 97 ND -- 06/17/98 236 891 000 -655 -101 ND -- ND ND ND ND ND 4 1 ND ND ND ND ND ND 09/41/98 236 976 000 -740 -085 ND -- ND ND ND ND ND ND 12/03/98 236 905 000 -669 0 71 ND -- ND ND ND ND ND ND 03/01/99 236 8 02 000 -5 66 1 03 ND 04/15/99 2 89 8 75 000 -586 -020 ND ND ND ND ND ND 06/01/99 2 89 956 000 -667 -081 ND 08/16/99 2 89 980 0 00 -- ND ND ND ND ND ND -6 91 -0 24 ND ND ND ND ND ND ND 11/29/99 289 966 0 00 -677 0 14 ND 02/2$/00 2 89 6 91 000 -4 02 2 75 ND -- ND ND ND ND ND ND -- ND ND ND ND ND ND 05/10/00 2 89 885 000 -5 96 -194 ND -- ND ND ND ND ND ND 08/03/00 2 89 9 52 0 00 -6 63 -067 ND 11/16/00 2 89 906 000 -617 046 ND ND ND ND ND ND ND 42/05/01 2 $9 896 000 -6 07 010 ND -- ND ND ND ND ND ND -- ND ND ND ND ND ND 05/07/01 2 89 8 75 000 -586 021 ND -- ND ND ND ND ND ND 08/20/01 2 89 998 000 -709 -123 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 11/19/01 2 89 947 000 -658 051 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<l 0 02/11/02 2 89 9 06 000 -6 17 041 ND<50 ND<0 50 0 6 ND<0 50 ND<0 50 ND<2 5 ND<2 0 5886 Page 19 of 31