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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through August 2004 Former BP Oil 11192 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE TBA Comments Sampled Elevation Water Thickness water to 8260B benzene Xylenes 8021B 8260B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µ8l1) (µg/1) 410) (µg/l) (µg11) (1811) (µg11) (µg/1) MW-3 05/01/90 552 25 23 000 -1971 -- 200 -- 33 ND 2 1 5 08/05/91 5 52 -- - -- -- -- -- - - -- -- Dry 12/09/91 5 52 - -- __ _ __ __ _ _ -- -- -- Dry 03/09/92 5 52 - - - - - - - - -- - -- Dry 06/19/92 5 52 - - - - - - - - -- Dry 09/18/92 5 52 -- - - - - - - -- -- Dry 12/09/92 552 -- - -- - -- -- - -- - Dry 03/11/93 5 52 -- - - - - - - - - - Dry 06/15/93 5 52 2702 000 -21 50 09/15/93 552 2743 000 -21 91 -041 12/22/93 5 52 2730 000 -21 78 000 2300 -- 31 65 120 220 - - -- D 12/22/93 5 52 2730 000 -21 78 0 13 2300 -- 31 6 6 120 220 - -- 04/01/94 5 52 2642 000 -2090 088 07/27/94 5 52 2650 000 -2098 000 920 82 2 41 64 251 -- - D 07/27/94 5 52 26 50 0 00 -2098 -008 1100 -- 8 6 2 4 60 90 --11/30/94 552 2686 000 -2134 -036 02/15/95 552 2655 000 -21 03 0 31 1200 -- 10 l 2 85 110 -- D 02/15/95 5 52 2655 000 -21 03 000 950 -- 9 1 099 59 79 -- - -- 04/21/95 5 52 2458 000 -1906 197 07/19/95 5 52 23 69 000 -18 17 0 89 10/20/95 5 52 24 11 000 -1859 000 520 5 6 ND<0 50 2 2 1 4 410 - -- D 10/20/95 5 52 24 11 000 -18 59 520 4 7 ND<0 50 14 12 240 - -- P 04/23/96 5 52 - - -- - ND<500 -- 5 7 2 2 1 300 -- Pre-purge 04/23/96 5 52 20 80 000 -15 28 3 31 ND<500 -- 5 1 ND<0 5 10 5 280 - 11192 Page 3 of 18