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TABLE 5 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS November 1990 Through January 2007 Former Bulk Plant 0788 Date TOC Depth to LPH Ground- Change TPH-D TPH-G TPH-G Benzene Toluene Ethyl- Total MTBE Comments Sampled Elevation Water Thickness water in (8015M) (GC/MS) benzene Xylenes (826013) Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg/1) (µg/1) (41) (µg/1) (119/1) (µg/l) U-3 continued 02/14/91 45.28 9.02 0.00 36.26 0.62 ND -- ND ND ND ND ND -- 05/23/91 45.28 8.28 0.00 37.00 0.74 ND -- ND ND ND ND ND -- 08/30/91 4528 8.46 0.00 36.82 -0.18 ND - ND ND ND ND ND - 11/06/91 45.28 9.40 0.00 35.88 -0.94 ND - ND ND ND ND ND -- 02/19/92 4528 8.65 0.00 36.63 0.75 3700 - ND ND ND ND ND - 03/31/92 45.28 9.37 0.00 35.91 -0.72 ND - ND ND ND ND ND - Samples collected on 4/1192 05/08/92 45.28 -- 0.00 -- - ND - ND ND ND ND ND - 08/06/92 45.28 - 0.00 -- - ND - ND ND ND ND ND - - 11/18/92 45.28 -- 0.00 -- -- 60 -- ND ND ND ND ND - 01/21/93 45.28 -- 0.00 ND -- ND ND ND ND ND -- 0526/93 45.28 8.42 0.00 36.86 -- ND -- ND ND ND ND ND -- 0824/93 45.28 850 0.00 36.78 -0.08 ND -- ND ND ND ND ND -- 11/30/93 45.15 8.90 0.00 36.25 -0.53 ND -- ND ND ND ND ND -- 02/18/94 45.15 8.61 0.00 36.54 0.29 ND - ND ND ND ND ND -- 05/12/94 45.15 8.23 0.00 36.92 0.38 ND - ND ND ND ND ND - 08/08/94 45.15 8.02 0.00 37.13 0.21 58 - ND ND ND ND ND - 11/08/94 45.15 9.34 0.00 35.81 -1.32 ND - ND ND ND ND ND - 02/13/95 45.15 9.02 0.00 36.13 0.32 ND - ND ND ND ND ND -- 10/10/95 45.15 - 9.21 0.00 35.94 -0.19 ND - ND ND ND ND ND - 02/13/96 45.15 8.52 0.00 36.63 0.69 ND - ND ND ND ND ND -- 11/06/96 45.15 7.83 0.00 37.32 0.69 ND - ND ND ND ND ND - 05/06/97 45.15 7.07 0.00 38.08 0.76 60 - ND ND ND ND ND - 04/29/98 45.15 8.60 0.00 36.55 -1.53 81 - ND ND ND ND ND ND 12/01/98 45.15 8.90 0.00 36.25 -0.30 130 - ND ND ND ND ND ND 0788 Page 4 of 14