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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through August 2005 Former BP Oil 11192 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE M7 BE TBA Comments Sampled Elevation Water Thickness water to 8260B benzene Xylenes 8021B 8260B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (µg11) (40) (µg/1) (µg/1) (µg/1) (4g/1) (µg/1) MW-1 05/01/90 5 52 2511 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 06/19/92 552 -- -- -- .. .. -. -- -- -- -- -- -- -- Dry 09/18/92 5 52 -- -- _ __ -- -- -- -- -- - Dry 12/09/92 5 52 -- -- -- -- -- -- - -- -- -- -- Dry 02/15/95 552 -- -- -_ 04/21/95 5 52 23 82 000 -1830 -- 820 -- 27 26 3 1 5 6 -- -- __ D 04/21/95 552 23 82 000 -1830 -- 720 31 29 3 5 5 7 07/19/95 552 2292 000 -1740 090 620 -- 40 2 24 23 P 10/20/95 5 52 23 32 000 -1780 -040 440 -- 16 051 073 22 64 -- -- Pre-purge D 10/20/95 5 52 2332 000 -1780 -040 480 17 ND<0 50 ND<0 50 15 ND<5 0 -- - Prc-purge 10/20/95 552 2332 000 -1780 -040 450 -- 30 067 06 1 53 -- -- D 10/20/95 552 2332 000 -1780 -0 40 460 -- 29 091 052 1 5 ND<5 0 -- P 04/23/96 5 52 1997 000 44 35 345 ND<500 11 ND<0 5 ND<0 5 ND<0 5 49 Pre-purge 04/23/96 5 52 1987 000 -1435 345 ND<500 -- 10 ND<0 5 ND<0 5 ND<0 5 42 -- -- i 07/12/96 5 52 2099 000 -1547 -1 12 10/18/96 5 52 2016 000 -1464 083 160 -- ND<0 5 ND<l 0 ND<1 0 ND<1 0 ND<10 -- -- 02/26/98 5 52 1190 000 -638 826 470 -- 16 ND<1 0 ND<1 0 ND<1 0 370 -. 07/07/98 5 52 11 40 000 -588 050 800 .- 'SID<0 5 ND<1 0 ND<1 0 ND<1 0 700 01/19/99 5 52 1347 000 -795 -207 730 ND<1 0 ND<t 0 ND<1 0 ND<1 0 840 -- 07/14/99 5 52 1227 000 -675 120 3000 -- ND<1 0 ND<1 0 ND<1 0 ND<1 0 3300 -- 10/07/99 5 52 13 90 000 -838 -163 4000 - N1D<1 0 ND<1 0 ND<l 0 ND<l 0 2500 - -- 11192 Page 1 of 20