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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 in 8260E benzene Xylenes 8021E 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µgll) (µg/l) (µg11) (pg/1) (µg11) (µg/1) (µg/1) (10) MW-7 continued 06/26/00 11 82 2623 000 -1441 270 ND<50 0 -- 2 15 1 12 ND<O 500 152 131 109 09/22/00 11 82 28 77 000 -16 95 -254 ND<50 -- 45 ND<O 50 ND<O 50 1 2 130 110 12/26/00 11 82 28 64 000 -1682 0 13 ND<50 0 -- 2 24 ND<O 500 ND<O 500 ND<O 500 95 2 73 3 03/07/01 11 82 28 35 000 -1653 029 ND<50 0 -- 0 659 ND<O 500 ND<O 500 ND<O 500 549 585 06/26/01 11 82 2936 000 -1754 -101 ND<50 -- 35 ND<O 50 ND<O 50 ND<O 50 130 140 09/12/01 11 82 3131 000 -1949 -195 70 -- ND<O 50 ND<0 50 ND<O 50 ND<O 50 200 200 12/12/01 11 82 31 54 000 -1972 -023 ND<50 -- ND<O SO ND<O 50 ND<O 50 ND<O 50 150 190 03/20/02 11 82 3036 000 -1854 1 18 ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<O 50 ND<5 0 ND<2 0 06/06/02 11 82 3087 000 -1905 -051 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 09/30/02 11 82 3340 000 -2158 -253 -- 360 49 32 10 40 -- 17 12/30/02 11 82 3290 000 -2108 050 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 03/29/03 11 82 31 87 000 -2005 103 -- ND<50 ND<O 50 1 3 ND<O 50 1 3 -- ND<2 0 06/25/03 11 82 3032 0 00 -18 50 1 55 -- ND<50 ND<0 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 09/24/03 11 82 34 58 000 -2276 -4 26 -- ND<50 ND<O 50 062 ND<O 50 ND<l 0 -- ND<2 0 12/30/03 11 82 3406 000 -2224 052 - ND<50 056 2 9 070 3 3 -- ND<2 0 03/09/04 11 82 33 11 000 -21 29 0 95 - ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<2 0 06/16/04 11 82 3377 0 00 -21 95 -066 -- 57 ND<O 50 ND<O 50 ND<O 50 1 5 -- ND<O 50 09/20/04 11 82 3672 0 00 -2490 -295 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<O 50 12/30/04 11 82 3605 0 00 -24 23 067 ND<50 - 052 ND<O 50 080 3 7 - ND<O 50 03/24/05 11 82 3469 000 -22 87 l 36 ND<50 -- ND<O 50 067 ND<O 50 ND<1 0 - ND<0 50 MW-8 (Screen Interval to feet 49 0-69 0) 04/16/92 -- -- -- -- 07/30/92 -- -- -- -- -- ND<50 -- 17 ND<O 5 ND<O 5 ND<O 5 -- 10/21/92 -- -- -- -- ND<50 -- ND<O 5 0 8 ND<0 5 ND<O 5 -- -- Wall Page 16 of 36 !