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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS February 1990 Through December 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 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg11) (µg11) (µg11) (µg11) (µg11) (µg/1) (µg/l) MW-15 continued 09/20/04 1137 — -- -- — -- — -- — -- -- - — Ary well 12/30/04 1137 36 15 000 -2478 -- ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- 30 MW-16 (Screen Interval In feet 18 0,38 0) 08/2I/99 1179 2845 000 -1666 -- 1900 -- 27 ND<10 26 150 120 69 F 10125/99 1179 2939 000 -1760 -094 3100 -- 55 ND<10 77 360 170 100 01/27/00 1179 2895 000 -1716 044 4600 -- 78 57 170 390 130 130 06/26/00 1179 26 13 000 -1434 2 82 1650 -- 189 257 43 6 105 667 73 7 09/22/00 1220 2904 0 00 -1684 -250 1800 -- 16 ND<10 31 72 85 68 12/26/00 1220 2898 000 -1678 006 3720 -- 275 ND<10 0 627 178 176 111 03/07/01 12.20 2868 000 -1648 030 3690 -- 311 ND<10 0 547 200 ND<100 133 06/26/01 1220 2969 000 -1749 -101 4300 -- 38 NI3<5 0 61 170 100 ISO 09/12/01 1220 3155 000 -1935 -196 1400 -- 47 ND<5 0 22 85 110 190 I2/12101 1220 3182 000 -1962 -027 5600 -- 160 ND<5 0 72 270 210 250 03/20102 1220 3178 000 -1958 0 04 1800 -- 230 ND<5 0 45 67 210 230 06/06/02 1220 3103 000 -1883 0 75 -- 2000 290 ND<5 0 69 88 — 120 09/30/02 1220 3360 000 -2140 -257 -- 55 56 ND<O 50 12 16 — 3 12/30102 ,12 20 33 15 000 -2095 045 -- ND<50 0 53 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 03/29/03 1220 3212 000 -1992 103 -- 200 38 0 61 2 2 3 4 — 89 06/25/03 1220 32.42 000 -2022 -030 -- 220 24 057 32 5 6 -- 43 09/24/03 1220 3481 000 -2261 -239 -- 140 25 068 33 5 3 — 28 12/30/03 1220 3431 000 -2211 050 -- 200 32 ND<2 0 5 6 96 — 22 03/09/04 1220 33 43 000 -2123 088 — 150 29 0 71 59 10 — 16 06/16/04 1220 3403 000 -2183 -060 -- 280 35 ND<2 5 7 8 14 -- 16 09/20/04 1220 — — -.- _ _ _ _ — — _ _ — Dry well ssa� Page 27 of 35