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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS December 1992 Through August 2005 Former HP Oil 11I95 Date TOC Depth to I,Pl1 Ground- Change TPH-G TPPH Benzene "Toluene Ethyl- Total MTBh MTBE Comments Sampled Elevation Water Thickness water in 8260B benzene Xylenes 8021B 8260B Elevation Llevation (feet) (feet) (feet) (feet) (feet) (µg11) (µg/1) (µg/1) (µg/1) (µg11) (µg/1) (4g11) (pg/1) MW-4 continued 05/23/02 9.03 9.67 0.00 -0.64 -0.88 -- 120 ND<0.50 ND<0.50 ND<0.50 ND<1.0 86 08/15/02 14.37 10.12 0.00 4.25 4.89 __ 210 ND<0.50 ND<0,50 ND<0.50 ND<1,0 52 11/18/02 14.37 10.59 0.00 3.78 -0.47 -- 55 ND<0.50 0.66 ND<0.50 ND<1.0 42 02/13/03 14.37 9.83 0.00 4.54 0.76 67 ND<0.50 ND<0.50 ND<0.50 ND<I.0 -- 14 05/12/03 14.37 10.03 0.00 4.34 -0.20 - ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- 27 08/28/03 14.37 10,96 0.00 3.41 -0.93 85 ND<0.50 ND<0.50 ND<0.50 ND<1.0 19 11/24/03 14.37 10.66 0.00 3.71 0.30 -- 120 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- 3.1 02/26/04 14.37 9.87 0.00 4.50 0.79 120 ND<0.50 0.60 ND<0.50 ND<1.0 2.4 05/21/04 14.37 10.49 0.00 3.88 _0.62 __ 130 ND<0.50 ND<0.50 ND<0.50 ND<1.0 0.58 08/26/04 14.37 11.03 0.00 3.34 -0.54 -- 90 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -_ ND<0.50 11/29/04 14.37 11.54 0.00 2.83 -0.51 -- 100 ND<0.50 ND<0.50 ND<0.50 ND<1.0 __ 0.70 02/15/05 14.37 10.32 0.00 4.05 1.22 - ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 - ND<0.50 05/25/05 14.37 9.91 0.00 4.46 0.41 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- 0.57 08/31/05 14.37 10.11 0.00 4.26 -0.20 -- 83 ND<0.50 ND<0.50 ND<0.50 ND<1.0 ND<0.50 MW-5 (Screen Interval in feet:9.5-24.5) 12/21/92 10.70 12.74 0.00 -2.04 -- ND __ ND ND ND ND 05/17/93 10.70 9.94 0.00 0.76 2.80 ND ND ND ND ND 09/15/93 10.70 11.31 0.00 -0.61 -1.37 ND ND ND ND ND 01/12/94 10.70 12.07 0.00 -1.37 -0.76 ND - ND ND ND ND -- _ 05/12/94 10.70 11,36 0.00 -0.66 0.71 ND - ND ND ND ND _- 10/07/94 10.70 12.15 0.00 -1.45 -0.79 ND - ND ND ND ND _ 12/08/94 10.70 12.32 0.00 -1.62 -0.17 ND -- ND ND ND ND 02/21/95 10.70 10.01 0.00 0.69 2.31 ND - ND ND ND ND _ 06/09/95 10.70 9.49 0.00 1.21 0.52 11195 Page 10 of 26