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i 0 • 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 8260E benzene Xylenes 8021B 8260B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg11) (µg/1) (Pg/1) (µg/1) (µg11) (µg11) (µg11) (µg/1) MW-6 08/05/91 5 80 29 82 000 -2402 -- ND ND ND ND ND -- - - 08/15/91 5 80 - -- 12/09/91 5 80 3042 000 -2462 -- ND - ND ND ND ND -- -- __ 03/09/92 5 80 29 53 000 -23 73 0 89 ND -- ND ND ND ND -- -_ 06/19/92 5 80 2924 000 -2344 029 ND<50 -- ND<O 5 ND<0 5 ND<O 5 ND<O 5 -- -- - 09/18/92 5 80 3103 000 -25 23 -179 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 - - 12/09/92 5 80 31 42 000 -2562 -039 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 03/11/93 5 80 2895 000 -23 15 247 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- - - 06/15/93 5 80 2691 000 -21 11 2 04 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<0 5 - 09/15/93 5 80 2729 000 -21 49 -038 12/22/93 5 80 27 17 0 00 -21 37 0 12 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 - -- 04/01/94 5 80 2629 000 -2049 0 88 07/27/94 5 80 2632 000 -2052 -0 03 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 -- 11/30194 5 80 2680 000 -21 00 -048 02/15/95 5 80 25 73 000 -1993 l 07 ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<l 0 - -- 04/21/95 5 80 23 74 000 -1794 1 99 07/21/95 5 80 2298 000 -17 18 - ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- -- -- P 10/20/95 5 80 -- -- -- ND<50 - ND<O 50 ND<O 50 ND<O 50 ND<1 0 6 7 - -- Pre-purge 10/20/95 5 80 23 39 000 -1759 -041 ND<50 - 1 5 067 ND<O 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-purge 04/23/96 5 80 2000 000 -14 20 000 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 -13 62 0 80 2300 - 10 ND<l 0 ND<l 0 ND 11192 Page 10 of 18