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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 8260E benzene Xylenes 8021E 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (pg/1) (µg/l) (µg/1) (µg/1) (µg/l) (Pg/1) (µg/1) (ug/1) MW-7 continued 03/24/05 11 82 3469 000 -22 87 136 ND<50 ND<O 50 067 ND<O 50 ND<1 0 - ND<O 50 06/28/05 11 82 3324 000 -2142 145 ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<1 0 - ND<O 50 MWA (Screen Interval in 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 08 ND<O 5 ND<O 5 -- - 01113/93 -- -- -- -- -- ND<50 -- ND<O 5 ND<0 5 ND<O 5 ND<O 5 -- -- 04/26/93 1038 48 80 000 -3842 -- 120 -- 1 1 ND<O 5 ND<O 5 ND<O 5 -- - 07/26/93 1038 4979 000 -3941 -099 90 -- 0 6 ND<O 5 ND<O 5 ND<O 5 -- -- 10/20/93 1038 5028 000 -3990 -049 92 -- 4 072 076 l 8 -- -- 01/17/94 1038 47 85 0 00 -3747 243 620 -- 3 9 2 7 11 48 -- -- 02/28/94 1038 4677 000 -3639 1 08 88 -- ND<O 5 ND<O 5 ND<O 5 0 9 -- -- 04/25l94 1038 4581 000 -35 43 096 94 - 067 12 052 2 4 - -- 07/25/94 1038 4820 000 -3782 -239 170 -- ND<O 5 0 82 ND<O 5 1 7 - 10/26/94 1038 4933 000 -38 95 -1 13 ND<50 -- ND<O 5 ND<O 5 ND<O 5 1 3 -- - 01/25/95 1038 4663 000 -3625 2 70 ND<50 -- ND<O 5 0 72 ND<O 5 14 -- 04/26/95 1038 42 13 000 -31 75 450 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- 07/26/95 1038 43 10 000 -3272 -097 ND<50 - 079 2 2 ND<O 5 2 7 - -- 10/25/95 1038 4394 000 -3356 -084 01/25/96 1038 41 14 000 -3076 280 ND<50 -- ND<O 5 ND<O 5 ND<O 5 0 65 - 04/25/96 1038 3659 000 -2621 4 55 -- 07/24/96 1038 3688 000 -2650 -029 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 -- 10/23/96 1038 38 64 000 -2826 -176 __ -- __ -- __ Sampled Semi-annually 01/20/97 1038 35 17 0 00 -2479 347 290 -- 4 3 0 82 ND<O 5 4 5 9 3 -- 6981 Page 17 of 37