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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS February 1990 Through September 2004 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 826013 benzene Xylenes 80218 8260B Elevation Elevation (feet) (fed) (fes) (fed) (fes) (11811) (4 94) (ILYA) (FtBn) (41911) 010) (98/i) (Agn) MW-6 continued 09124/03 1143 3282 000 -2139 -134 — ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<2 0 17.!30/03 11 43 3326 000 -2183 -044 -- ND<50 ND<O 50 l 1 ND<O 50 18 -- ND<2 0 03/09/04 1143 3241 000 -2098 085 -- ND<50 ND<O 50 ND<O 50 ND<O 50 15 -- ND<2 0 06/16104 1143 3306 000 -2163 -065 55 ND<O 50 085 ND<O 50 12 -- ND<O 50 09/20!04 1143 3593 000 -2450 -287 ND<50 — ND<O 50 ND<O 50 ND<O 50 ND<10 - ND<O 50 MW-7 (Screen Interval In feet-49 0-69.0) 04/16/92 — -- -- — — -- _ _ — — — _ 07/30/92 -- -- -- — -- 950 — 320 19 57 25 — — 10/21/92 -- -- -- -- — 240 — 35 26 19 32 -- — 01/13/93 -- -- -- -- — 2400 -- 1000 95 35 120 — — 04/26/93 1182 5108 000 -3926 — 500 -- 170 ND<2 5 ND<2 5 10 - - 07/26/93 1182 5111 000 -4029 -103 3800 — 1200 59 92 140 — -- 10/20/93 11 82 5263 000 -4081 -052 3500 -- 690 34 44 53 -- -- 01/17/94 1182 5010 000 -3828 2.53 150W — 4800 460 290 620 — -- 04/25/94 1182 4798 000 -3616 — 8300 — 3700 ND<25 400 130 — -- 07/25/94 1182 5046 000 -3864 -248 9300 — 3300 54 420 120 -- -- 10/26/94 1182 5163 000 -3981 -1 17 3700 — 1900 11 240 ND<10 — -- 01/25/95 1182 48 85 000 -3703 178 250 — 29 1 18 21 — -- 04/26/95 1182 4433 000 -3251 452 97 -- 24 074 ND<O 5 067 — -- 07/26/95 1182 4538 000 -3356 -105 330 17 61 23 62 — -- 10/25/95 1182 4624 000 -3442 -086 — — — — — — — — OU24196 1182 4329 000 3147 295 76 -- 18 ND<O 5 ND<O 5 055 -- -- 04/25/96 1182 3864 000 -2682 -- _ — — _ .. _ — _ 07/24/96 1182 3904 000 -2722 -040 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 86 — egs� Page 14 of 35