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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS February 1990 Through March 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 to 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (µg/1) (µg11) (µgll) (µg/1) W/1) (µg/1) MW-1 continued 06/06/02 1107 29 59 000 -1852 -041 -- ND<50 ND<0 50 0 79 ND<0 50 ND<1 0 -- ND<2 0 09/30/02 11 07 3207 000 -21 00 -248 -- ND<50 11 1 8 1 2 42 -- ND<2 0 12/30/02 11 07 3165 000 -2058 042 -- ND<50 ND<0 50 056 ND<0 50 1 3 -- ND<2 0 03/29/03 1107 3072 000 -1965 093 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 06/25/03 1107 3098 000 -1991 -026 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 09/24/03 1107 3322 000 -22 15 -224 - ND<50 ND<0 50 088 ND<0 50 ND<l 0 -- ND<50 12/30/03 1107 32 85 000 -21 78 037 -- ND<50 ND<0 50 064 052 1 5 ND<2 0 03/09/04 1107 3191 000 -2084 094 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<2 0 06/16/04 1107 3257 000 -2150 -066 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 09/20/04 1107 3537 000 -2430 -280 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<0 50 12/30/04 1107 34 84 000 -23 77 053 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- ND<0 50 03/24/05 1107 3343 000 -2236 141 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 18 MW-2 (Screen Interval in feet 510-55 0) 02/21/90 -- -- - -- -- 12000 - 1900 75 21 140 -- -- 10/18/90 -- -- -- __ Dry 11/19/90 -- -- -- -- -- -- -- -- -- - -- -- -- Dry 12/27/90 -- -- -- _- Dry 0I/28/91 -- -- - -- -- - -- - - -- - Dry 04/02/91 -- - - -- -- - - - -- - -- -- Dry 07/18/91 -- -- Dry 09/30/91 -- -- -- Dry 11/14/91 -- -- -- __ -- -- -- -- Dry 04/16/92 -- -- -- __ 07/30/92 -- -- -- -- -- -- -- -- -- -- -- -- Dry -- -- -- -- Dry i ssa� Page 3 of 36