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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 8021B 8260B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (4g/1) (µg11) (41) (11g11) 4L /l) (µg11) 4Lg/1) (µg/1) 5 MW-6 continued 08/14/03 528 15 43 000 -10 15 000 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- ND<2 0 ND<100 D 08/14/03 528 1543 000 -10 15 .149 - 11/26/03 528 16 29 000 -1101 -086 -- 50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- 7 3 ND<100 02/23/04 528 1481 000 -953 148 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- 3 1 ND<100 05/21/04 5 28 1445 000 -917 036 -- ND<50 ND<O 50 ND<0 50 ND<O 50 ND<l 0 -- 079 ND<5 0 08/10/04 528 15 67 000 -1039 -122 -- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- 2 2 ND<5 0 11/24/04 528 1620 000 -1092 -053 - ND<50 ND<O 50 ND<O 50 ND<O 50 ND<l 0 -- ND<O 50 ND<5 0 MW-7 08/05/91 621 3082 000 -2461 -- 70 -- 19 ND ND ND 08/15/91 6 21 -- 12/09/91 6 21 3136 000 -25 15 -- ND -- 19 ND 1 2 ND 03/09/92 6 21 30 15 000 -23 94 121 ND ND ND ND ND 06/19192 6 21 30 19 000 -23 98 -004 ND<50 -- ND<O 5 ND<O 5 ND<O 5 ND<O 5 09/18/92 6 21 3198 000 -2577 -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 6 21 2985 000 -23 64 2 48 110 -- 3 1 08 2 2 14 06/15/93 6 21 2774 000 -21 53 2 11 71 -- 14 0 8 28 2 4 -- -- .. D 06/15/93 6 21 2774 000 -21 53 0 00 120 - 1 9 ND<O 5 5 9 4 6 -- -- __ 09/15/93 6 21 28 16 000 -2195 0 00 170 - 1 2 ND<O 5 5 8 2 5 D 09/15/93 6 21 28 16 000 -2195 -042 160 -- 1 ND<O 5 5 5 2 6 12/22/93 6 21 28 03 000 -2182 0 13 110 -- 19 13 3 8 10 04/01/94 621 2715 000 -2094 0 00 340 -- 2 5 1 30 43 496 -- D 04/01/94 621 2715 000 -2094 088 330 2 6 0 9 28 42 -- 11192 -1 192 Page 12 of 18