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• i i Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through August 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 8021B 8260B 8260B Elevation Elevation (feet) {feet} (feet) (feet) (feet) (µg/1) (µgll) (µg11} (µgll) (µg/1) (µg11) (µg/1) (µg11) (µg11) MW-6 continued 08/10/04 528 15 67 000 -1039 -122 -- ND<SO ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- 22 ND<5 0 MW-7 08/05/91 621 30 82 000 -2461 -- 70 - 19 ND ND ND - -- 08/15/91 621 -- -- -- - -- - -- - -- - -- - - 12/09/91 621 31 36 000 -25 15 -- ND -- 19 ND 1 2 ND -- -- -- 03/09/92 621 30 15 000 -23 94 1 21 ND - ND ND ND ND -- -- -- 06/19/92 621 30 19 000 -23 98 -004 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- -- -- 09/18/92 621 31 98 000 -25 77 -179 90 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- - 12/09/92 621 3233 000 -26 12 -035 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 - -- D 12/09/92 621 3233 000 -26 12 000 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- 03/11/93 621 2985 000 -23 64 2 48 110 -- 3 1 08 22 14 -- -- 06/15/93 621 2774 000 -21 53 2 11 71 14 08 28 24 - D 06/15/93 621 2774 000 -21 53 000 120 - 1 9 ND<O 5 59 46 -- -- 09/15/93 621 28 16 000 -21 95 000 170 1 2 ND<O 5 5 8 2 5 -- -- - D 09/15/93 621 28 16 000 -21 95 -042 160 -- 1 ND<O 5 55 26 -- -- -- 12/22/93 621 2803 000 -21 82 0 13 110 19 1 3 3 8 10 - -- 04/01/94 621 27 15 000 -2094 000 340 2 5 1 30 43 496 -- D 04/01/94 621 27 15 000 -2094 088 330 26 09 28 42 -- 07/27/94 621 2721 000 -21 00 -006 72 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 2855 11/30/94 621 2758 000 -21 37 000 140 - ND<O 5 0 8 44 8 3 64 - - D 11/30/94 621 2758 000 -21 37 -037 140 06 1 5 93 69 - 02/15/95 621 2658 000 -2037 1 00 90 - ND<O 50 ND<O 50 2 1 1 7 -- 04/21/95 -04121/95 621 2461 000 -1840 1 97 53 065 ND<O 50 14 1 4 -- 07/19/95 621 23 74 000 -1753 087 81 059 ND<O 50 055 ND<1 0 -- -- 11192 Page 12 of 18