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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS February 1990 Through June 2005 Former 76 Station 6981 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 8021B 82608 Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg11) (Ng/1) (ugll) (µg/1) (µg/1) (µg/1) W11) MW-4 continued 01/27/00 1163 2851 000 -1688 049 ND<50 -- ND<0 50 066 ND<0 50 ND<0 50 ND<2 5 ND<2 0 06/26/00 11 63 25 74 000 -1411 277 ND<50 0 -- ND<O 500 1 g ND<0 500 154 ND<5 0 ND<2 0 09/22/00 1163 28 14 000 -16 S1 -240 ND<50 -- ND<0 50 1 ND<0 50 099 ND<2 5 ND<2 0 12/26/00 11 63 28 19 000 -1656 -005 ND<S0 0 -- ND<O 500 ND<0 500 ND<O 500 ND<0 509 ND<5 0 ND<2 0 03/07/01 11 63 2793 000 -1630 026 ND<50 0 -- ND<O 500 ND<O 500 ND<O 500 ND<O 590 ND<5 0 ND<2 0 06/26/01 11 63 2888 000 -1725 -095 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 09/12/01 1163 3078 000 -19 15 -1 90 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 12/12/01 1163 3105 000 -1942 -027 ND<50 -- ND<0 50 ND<0 S0 ND<0 50 ND<0 50 ND<5 0 ND<1 0 03/20/02 1163 2986 000 -1823 1 19 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<5 0 ND<2 0 06/06/02 11 63 3027 000 -1864 -041 - ND<50 ND<0 50 2 2 ND<0 50 2 2 -- ND<2 0 09/30/02 11 63 3278 000 -21 15 -251 ND<50 079 1 7 0 88 4 3 -- ND<2 0 12/30/02 11 63 3237 0 00 -2074 041 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 03/29/03 1163 31 32 000 -1969 1 05 -- ND<50 ND<0 50 ND<0 50 ND<0 50 13 -- ND<2 0 06/25/03 1163 3167 000 -2004 -035 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 09/24/03 11 63 34 01 000 -22 38 -234 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<2 0 12/30/03 11 63 3351 000 -21 88 050 -- ND<50 ND<0 50 076 ND<0 50 2 5 - 21 03/09/04 11 63 3260 000 -2097 0 91 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<2 0 06/16/04 11 63 3326 000 -21 63 -0 66 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<0 50 09/20/04 1163 36 12 000 -2449 -286 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 - ND<0 50 12/30/04 1163 3560 000 -2397 052 ND<50 - ND<0 50 ND<O 50 ND<0 50 2 1 ND<0 50 I -- 03/24/05 11 63 34 11 000 -2248 149 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 06/28/05 11 63 3280 000 -21 17 131 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 - ND<0 50 MVV-5 (Screen Interval in feet 50 0-55 0) 02/21/90 -- -- -- -- 3600 -- 77 16 05 17 -- -- 6981 Page 9 of 37