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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS February 1990 Through September 2004 Former 76 Statton 6981 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Cotnanents Sampled Elevation Water Thickness water to 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (jig/1) (99I1) (µ9I1) (µg/1) (µ911) (µg/1) (90) {µg11) MW-4 continued 09/12/01 1163 3078 000 -1915 -190 ND<50 — NDN 50 ND<0 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 12/12/01 1163 3105 000 -1942 -027 ND<50 — ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<0 03120/02 1163 2986 000 -1823 119 ND<50 -- NDN 50 ND<O 50 ND<0.50 NDN 50 ND<5 0 ND<2 0 06/06/02 1163 30 27 000 -1864 -041 -- ND<50 ND<O 50 22 ND<O 50 22 -- ND<2 0 09/30/02 1163 3278 000 -2115 -251 -- ND<50 079 17 0 88 43 -- ND<2 0 12/30/02 1163 3237 000 -2074 041 -- NDC50 NIKO 50 NDN 50 ND<0 50 ND<1 0 -- ND<2 0 03/29/03 1163 3132 000 -1969 1 05 -- NDX50 N1<0 50 NIK0 50 ND<0 50 13 — ND<0 06/25/03 1163 3167 000 -2004 -035 -- ND-,50 ND<O 50 ND<0 50 ND<O 50 ND<1 0 — ND-,2 0 09/24/03 1163 3401 000 -2238 -234 -- ND<50 NDN 50 ND<O 50 ND<O 50 NIM 0 -- ND<2 0 12/30/03 1163 3351 000 -2198 050 -- ND<O ND<O 50 076 ND<O 50 25 — 21 03/09/04 1163 3260 000 -2097 091 -- ND<50 ND<0 50 ND<O 50 ND<O 50 ND<l 0 — NDQ 0 06/16/04 1163 3326 000 -2163 -066 -- NDC50 NDN 50 ND<O 50 ND<0 50 ND 09/20/04 1163 3612 000 -2449 -286 ND<50 -- ND<O 50 ND<0 50 ND<O 50 ND<1 0 -- ND<50 MW-5 (Screen Interval In feet 50 0-55 0) 02/21/90 — -- -- — -- 3600 — 77 16 05 17 — — 10/18/90 -- -- — _ — — __ — — — -- _ _ Dry 11/19/90 -- — _ .- — -- _ — _ -- _ — Dry 12/27/94 -- — -- — — _ _ — _ _ __ — — Dry 01/28/91 -- -- — — _ -- _ _ _ — -- _ Dry 04/02/91 — -- — — _ _ _ _ _ __ _ _ Dry 07/18/91 -- -- — — _ — _ _ _ _ _ — Dry 09/30/91 -- — — — — — — — — — — — Dry 11/14/91 -- — -- — — — — _ _ _ — Dry 04/16/92 -- — — -- _ _ — — — _ Dry seat Page 9 of 35