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4. tS1: Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS December 1992 Through March 2405 Former BP Oil 11195 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments- Sampled Elevation Water Thickness water in 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (µg/1) (µg11) (11g11) (µg11) (µg11) (µg11) MW-10 continued 11/19/99 8.12 8-72 0.00 -0.60 -0.31 ND -- 17 ND ND ND 9400 14000 2/22100 8.12 6.39 0-00 1.73 2.33 ND -- ND ND ND ND 11-7 13.6 515/00 8-12 6.83 0.00 1-29 -0.44 ND -- ND ND ND ND ND ND 8/28/00 8-12 8.23 0.00 -0.11 -1.40 ND -- ND ND ND ND 1760 2120 11/13100 8-12 8.59 0-00 -0.47 -0.36 ND -- ND ND ND ND 44400 37000 2/9101 8.12 8.37 0.00 -0.25 0.22 ND -- ND ND ND ND 43400 37100 5/11/01 8.12 7.78 0.00 0.34 0.59 ND -- ND ND ND ND 7100 6530 8110101 8.12 8.75 0.00 -0.63 -0.97 ND<1200 -- ND<12 ND<12 ND<12 ND<12 21000 21000 11/21/01 8.12 9.28 0.00 -1.16 -0.53 ND<1200 -- ND<12 ND<l2 ND<12 ND<12 22000 22000 2/7102 8.12 7.26 0.00 0.86 2.02 ND<50 -- ND<0.50 ND<0.50 ND<0.50 ND<0.50 4000 4900 5123/02 8.12 8.25 0.00 -0.13 -0-99 - ND<2500 ND<25 ND<25 ND<25 ND<50 -- 4000 8115/02 12.01 8.70 0.00 3.31 -- -- 520 ND<5.0 ND<5.0 ND<5.0 ND<10 -- 2000 11/18/02 12.01 9.10 0.00 2.91 -0.40 -- ND<500 ND<5.0 ND-<5.0 ND<5.0 ND<10 -- 860 2/13/03 12.01 8.29 0.00 3.72 0.81 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 - 53 5/12103 12.01 8-53 0.00 3.48 -- -- ND<50 ND<0.50 ND<0-50 ND<0.50 ND<1.0 -- ND<2.0 8128103 12.01 9-43 0-00 2.58 -0.90 -- 58 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- ND<2.0 11/24/03 12-01 9-18 0-00 2.83 0.25 - ND<50 ND<0.50 0.64 ND<0.50 ND<1.0 -- 3.1 2126/04 12-01 8.13 0-00 3-88 1.05 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1-0 -- 13 5121/04 12.01 9.82 0-00 2.19 -1.69 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- 0.96 8/26104 12.01 10.40 0.00 1.61 -0.58 -- 430 ND<1.0 ND<1.0 ND<1.0 ND<2.0 -- 260 11/29/04 12-01 10.82 0.00 1.19 -0.42 -- 990 ND<1.0 ND<1.0 ND<1-0 ND<2.0 -- 1200 2/15105 12.01 9.64 0-00 2.37 1.19 -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- 250 MW-11 (Screen Interval in feet:4.0-14.0) 913/98 7-38 6.98 0.00 0-40 -- ND -- ND ND ND ND ND -- 11195 Page 17 of 24 �_..._- «•.,� -•� -- _r_ _-----