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Table 2 HISTORIC FLUID LEVELS AND SELFCTED ANALYTICAL RESULTS May 1990 Through February 2005 Former BP 011 11192 I 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 8260E Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg11) (µg11) (pg/1) (µg11) (µg/1) (µg11) (µg11) (11g/1) MW-4 continued 04/12/01 675 1297 000 -622 1 44 400 -- ND<O 5 ND<O 5 ND<O 5 ND<l 5 544 -- - 07/23/01 6 75 1468 000 -793 -171 440 - ND<O 5 ND<O 5 ND<O 5 ND<l 5 610 -- -- 08/16/01 621 15 07 000 -8 86 -093 -- - -- -- -- -- -- -- 11/09/01 -11/09101 6 21 1604 000 -9 83 -- ND<50 -- ND<O 50 ND<O 50 ND<O 50 ND<O 50 530 470 ND<50 12/14/01 6 21 15 86 000 -965 0 18 650 -- ND<O 5 ND<O 5 ND<O 5 ND<1 0 612 -- 01/10/02 621 1400 000 -779 1 86 470 -- ND<2 5 ND<2 5 ND<2 5 ND<5 0 383 -- 02/18/02 6 21 13 92 000 -771 0 08 ND<50 - ND<O 50 ND<O SO ND<O 50 ND<O 50 44 55 ND<100 05/31/02 6 21 14 12 000 -791 -020 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- 64 ND<100 08/08/02 621 1549 000 -927 -136 220 ND<O 50 ND<O 50 ND<O 50 ND<O 50 - 270 ND<20 11/15/02 6 21 16 85 000 -1064 -1 37 -- 150 ND<O 50 067 ND<O 50 064 - ISO ND<100 01/03/03 621 15 79 000 -958 106 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- 130 ND<100 05/14/03 6 21 1493 000 -872 0 86 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<O 50 - 19 ND<100 08/14/03 621 16 51 000 -1030 -1 58 - ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 - 42 ND<100 11/26/03 621 18 37 000 -12 16 -1 86 -- 130 ND<O 50 070 ND<O 50 ND<1 0 - 71 ND<100 02/23/04 621 15 87 000 -966 250 - ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 20 ND<100 05121104 621 15 50 000 -929 037 -- 51 ND<O 50 ND<O 50 ND<O 50 ND<l 0 - 28 ND<5 0 08/10/04 6 21 16 73 000 -1052 -1 23 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 - 12 ND<5 0 11/24/04 621 1727 000 -11 06 -054 - 54 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- 54 ND<5 0 02/25/05 6 21 15 28 000 -907 1 99 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- 2 7 ND<5 0 MW-5 08/05/91 6 15 3072 000 -24 57 -- ND -- ND ND ND ND - -- 08/15/91 615 -- -- -- - -- -- -- -- - -- -- 12/09/91 6 15 31 10 000 -2495 -- ND - ND ND ND ND -- - -- 03/09/92 6 15 3047 000 -2432 0 63 ND 6 2 ND 0 5 ND - - - 11192 Page 7 of 18