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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through November 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 in 8260B benzene Xylenes 80218 82608 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg11) (µg/1) (µg/1) (µgll) (µg/1) (µg11) (µg11) MW-6 continued 12/09/91 5 80 3042 000 -2462 -- ND ND ND ND ND 03/09/92 5 80 2953 000 -23 73 0 89 ND -- ND ND ND ND 06/19/92 5 80 2924 000 -2344 0 29 ND<50 -- ND<0 5 ND<0 5 ND<0 S ND<0 5 09/18/92 5 80 3103 000 -2523 -179 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- -- __ 12/09/92 5 80 31 42 000 -25 62 -039 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- -- -_ 03/11/93 580 2895 000 -23 15 247 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 06/15/93 5 80 2691 000 -21 11 204 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 09/15/93 5 80 2729 000 -2149 -038 12/22/93 5 80 27 17 000 -21 37 0 12 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 04/01/94 5 80 2629 000 -2049 088 07/27/94 5 80 2632 000 -2052 -003 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 11/30/94 5 80 2680 000 -2100 -048 02/15/95 5 80 25 73 000 -1993 107 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 04/21/95 5 80 2374 000 -1794 1 99 07/21/95 5 80 2298 000 -1718 - ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- -- ._ P 10/20/95 5 80 -- - -- ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<] 0 6 7 - -- Pre-purge 10/20/95 5 80 23 39 000 -1759 000 ND<50 -- 15 067 ND<0 50 ND<1 0 ND<5 0 -- D 10/20/95 5 80 23 39 000 -1759 000 P 04/23/96 5 80 -- -- -- -- ND<500 - ND<5 ND<5 ND<5 13 2700 -- . Pre-purgc 04/23/96 5 80 2000 000 -1420 0 00 ND<500 -- ND<12 ND<12 ND<12 ND<12 4100 -- - 07/12/96 5 80 2022 000 -1442 -022 10/18/96 5 80 1942 000 -1362 080 2300 - 10 ND<l 0 ND<l 0 ND<l 0 7900 02/26/98 5 80 1160 000 -5 80 000 490 -- ND<0 5 ND<1 0 ND<l 0 ND<l 0 590 D 02/26/98 580 1160 000 -5 80 7 82 460 ND<0 5 ND<l 0 ND<l 0 ND<1 0 680 -- 11192 Page 10 of 18