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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) (ug/1) (Ng/1) (µg/1) W/1) (µg11) (µg/,) (µg/1) (µg/1) PTW-1 (Screen Interval in feet 52 5-72 5) 01/25/99 -- 2891 -- -- ND<50 -- ND<O 50 ND<O 50 ND<O 50 1 5 9 4 8 4 04/19/99 -- 2642 -- -- -- ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 4 2 3 4 07/15/99 -- 2792 -- -- -- ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 10/25/99 - 2949 - -- -- ND<50 - ND<O 50 085 ND<O 50 1 1 ND<2 5 ND<2 0 01/27/00 -- 2897 - -- -- ND<50 - ND<O 50 0 6 ND<O 50 I 1 ND<2 5 ND<2 0 06/26/00 -- 2623 - -- ND<50 0 -- ND<O 500 0 904 ND<O 500 0 955 ND<5 0 4 75 09/22/00 1188 28 76 000 -1688 - ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<2 5 ND<2 0 12/26/00 1188 28 65 000 -1677 O l l ND<50 0 -- ND<O 500 ND<O 500 ND<O 500 ND<O 500 ND<5 0 ND<2 0 03/07/01 11 88 2837 000 -1649 028 ND<50 0 __ ND<O 500 ND<0 500 ND<O 500 ND<O 500 ND<5 0 ND<2 0 06/26/01 1188 2936 000 -1748 -099 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 12 18 09/12/01 11 88 3132 0 00 -1944 -196 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 15 20 12/12/01 11 88 3155 000 -1967 -023 ND<50 - ND<O 50 ND<0 50 ND<O 50 ND<O 50 ND<5 0 7 5 03/20/02 11 88 3034 000 -1846 121 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 06/06/02 11 88 3082 0 00 -1894 -048 -- ND<50 ND<O 50 1 4 ND<O 50 14 -- ND<2 0 09/30/02 11 88 3335 000 -21 47 -253 - ND<50 079 14 ND<O 50 2 -- 3 6 12/30/02 11 88 3292 000 -21 04 043 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<2 0 03/29/03 11 88 3197 000 -2009 0 95 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 06/25/03 11 88 3226 000 -2038 -029 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 - ND<2 0 09/24/03 11 88 3456 000 -2268 -230 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<2 0 12/30/03 11 88 34 15 000 -2227 041 -- 54 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 03/09/04 11 88 33 12 000 -2124 103 -- ND<50 ND<O 50 093 ND<O 50 14 -- ND<2 0 06/16/04 11 88 3380 000 -21 92 -068 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND 09/20/04 11 88 3673 000 -24 85 -2 93 ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<O 50 12/30/04 11 88 3609 000 -2420 065 ND<50 -- ND<O 50 ND<O 50 ND<O 50 19 ND<O 50 6981 Page 29 of 37