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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through May 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 82608 Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg11) (µg/1) (µg11) (µg/1) (µg11) (µg11) (µg/1) MW-1 5/1/1990 552 2511 0 00 -1959 -- 140 -- 1 ND ND ND -- -- 8/5/1991 552 -- -- __ __ __ __ D ry 12/9/1991 5 52 -- -- _ __ __ __ _ _ Dry 3/9/1992 552 -- -- -- Dry 6/19/1992 5 52 -- -- __ __ __ _ Dry 9/18/1992 552 -- -- -- - _- - -- -- -- -- -- - Dry 12/9/1992 552 -- _ _- __ __ Dry 2/15/1995 5 52 4/21/1995 5 52 23 82 000 -1830 820 -- 27 2 6 3 1 5 6 -- -- -- D 4/21/199S 552 23 82 000 -1830 -- 720 31 2 9 35 5 7 -- -- -- 7/19/1995 5 52 2292 000 -1740 090 620 -- 40 2 2 4 2 3 -- -- P 10/20/1995 5 52 2332 000 -1780 -040 440 -- 16 051 073 2 2 6 4 -- -- Pre-purge B 10/20/1995 552 23 32 000 -1780 -040 480 - 17 ND<0 50 ND<0 50 1 5 ND<5 0 -- -- Pre-purge 10/20/1995 552 23 32 000 -1780 -040 450 - 30 067 0 6 1 5 3 - D 10/20/1995 552 2332 000 -1780 -040 460 -- 29 091 052 15 ND<5 0 - -- P 4/23/1996 552 1987 000 -1435 345 ND<500 -- 11 ND<0 5 ND<0 5 ND<0 5 49 - Pre-purge 4/23/1996 552 1987 000 -1435 345 ND<500 -- 10 ND<0 5 ND<0 5 ND<0 5 42 - -- 7/12/1996 552 2099 000 -1547 -1 12 10/18/1996 552 2016 0 00 -1464 0 83 160 -- ND<0 5 ND<1 0 ND<l 0 ND<1 0 ND<10 -- -- 2/26/1998 5 52 11 90 0 00 -638 826 470 -- 1 6 ND<1 0 ND<1 0 ND<l 0 370 -- -- 7/7/1998 552 1140 000 -5 88 050 800 -- ND<0 5 ND<l 0 ND<l 0 ND<1 0 700 -- - 1/19/1999 5 52 1347 000 -795 -207 730 -- ND<l 0 ND<l 0 ND<l 0 ND<1 0 840 - -- 7114(1999 5 52 1227 000 -675 120 3000 -- ND<1 0 ND<l 0 ND<1 0 ND<l 0 3300 -- 10/7/1999 552 1390 000 -838 -163 4000 -- ND<1 0 ND<l 0 ND<l 0 ND<1 0 2500 - 11192 Page 1 of 19