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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through February 2005 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 in 8260B benzene Xylenes 8021B 8260B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (µg/l) (1g11) (µg/1) (µg11) (µg11) (µg/1) (lig/1) MW-1 05/01/90 552 25 11 000 -1959 -- 140 -- 1 ND ND -- ND - -_ 08/05/91 5 52 - - -- - - - -- - -- - -- Dry 12/09/91 5 52 -- - - -- - - -- - - - Dry 03/09/92 5 52 - - - - - - - -- - -- - -- - Dry 06/19/92 5 52 -- - _ pry 09/18/92 552 - -- - - -- - -- -- - - - -- Dry 12/09/92 552 - - - -- - - - -- - -- - - Dry 02/15/95 5 52 -- - 04/21/95 552 23 82 000 -18 30 000 820 -- 27 2 6 3 1 5 6 -- -- -- D 04/21/95 552 23 82 000 -1830 -- 720 -- 31 29 3 5 5 7 -- -- 07/19/95 5 52 22 92 000 -1740 090 620 -- 40 2 2 4 2 3 - - P 10/20/95 5 52 - - -- 440 -- 16 051 073 2 2 6 4 -- - Pre-purge D 10/20/95 552 - - -- 480 -- 17 ND<0 50 ND<0 50 15 ND<5 0 __ __ Pre-purge 10/20/95 552 2332 000 -1780 000 450 -- 30 067 0 6 1 5 3 -- D 10/20/95 552 23 32 000 -1780 000 460 -- 29 091 0 52 15 ND<5 0 -- -- P 04/23/96 5 52 -- - - -- ND<500 -- 11 ND<0 5 ND<0 5 ND<0 5 49 -- -- Pre-purge 04/23/96 5 52 1987 000 -1435 000 ND<500 - 10 ND<0 5 ND<0 5 ND<0 5 42 -- -- 07/12/96 5 52 2099 000 -1547 -1 12 10/18/96 552 20 16 000 -1464 0 83 160 -- ND<0 5 ND 02/26/98 5 52 11 90 000 -6 38 8 26 470 1 6 ND<1 0 ND<1 0 ND<1 0 370 -- -- 07/07/98 5 52 11 40 000 -5 88 050 800 - ND<0 5 ND<1 0 ND<1 0 ND<l 0 700 - -- 01/19/99 5 52 1347 000 -7 95 -207 730 - ND<l 0 ND<1 0 ND<1 0 ND<l 0 840 - -- 07/14/99 552 1227 000 -6 75 1 20 3000 -- ND<1 0 ND<1 0 ND<l 0 ND<1 0 3300 -- - 10/07/99 552 1390 000 -8 38 -- 4000 ND<1 0 ND<1 0 ND<1 0 ND<1 0 2500 -- 11192 Page I of 18