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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS _ December 1992 Through March 2005 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) (µg11) (µg/1) (µg/l) (µg/1) (µg11) (µg/1) (µg/1) MW-4 continued 9115/98 14.32 8.75 0.00 5.57 5.12 590 -- ND 3.4 ND ND -- 990 12/23/98 . 9.03 9.09 0.00 -0.06 -5.63 34000 - ND ND ND ND 36000 -- 12/31/98 9.03 9.10 0.00 -0.07 -0.01 29000 -- ND ND ND ND 40000 - 3/22/99 9.03 7.85 0.00 1.18 1.25 4600 -- ND ND ND ND 4400 -- 5/20/99 9.03 7.90 0.00 1.13 -0.05 178 -- ND ND ND ND 3120 8230 8/11/99 9.03 9.42 0.00 -0.39 -1.52 297 -- ND ND ND ND 437 580 11/19/99 9.03 -- -- -- -- __ __ __ __ __ __ Inaccessible Paved Over 2/22/00 9.03 7.25 0.00 1.78 -- 120 -- 1.59 ND ND ND 333 382 5/5/00 9.03 7.54 0.00 1.49 -0.29 ND -- ND ND ND ND 151 302 8/28/00 9.03 9.08 0.00 -0.05 -1.54 61.2 -- 1.53 ND ND ND 27.6 29.7 11/13/00 9.03 9.40 0.00 -0.37 -0.32 ND -- ND ND ND ND 13.1 11 2/9/01 9.03 9.24 0.00 -0.21 0.16 66.6 -- ND ND ND ND 14 22.1 5/11/01 9.03 9.21 0.00 -0.18 0.03 313 -- 2.05 0.702 ND 2.1 7.92 12.8 8110/01 9.03 10.23 0.00 -1.20 -1.02 110 1.7 1.9 ND<0.50 1.4 15 16 11/21/01 9.03 10.82 0.00 -1.79 -0.59 ND<50 -- ND<0.50 ND<0.50 ND<0.50 ND<0.50 95 110 217/02 9.03 8.79 0.00 0.24 2.03 130 -- ND<0.50 ND<0.50 ND<0.50 ND<0.50 200 120 5/23102 9.03 9.67 . 0.00 -0.64 -0.88 -- 120 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- 86 8/15/02 14.37 10.12 0.00 4.25 -- -- 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 2/13/03 14.37 9.83 0.00 4.54 0.76 -- 67 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- 14 5/12/03 14.37 10.03 0.00 4.34 -- -- ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 -- 27 8/28/03 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<I.0 -- 3.1 2/26/04 14.37 9.87 0.00 4.50 0.79 -- 120 ND<0.50 0.60 ND<0.50 ND<1.0 -- 2.4 11195 Page 9 of 24 � �.�"u� �v�.'u� �. _._..__t'K:;.rr`- •'-`_C'.5'."LL?�. 21v•:?�ti3�__tiiS4• .t..__...._.._.....,_. m^TtT^ 1��.,-mrr�r,�'_'�c�- -'T.,Z"��«�.'--z"r'r W.�� .�,______�__ T...t t_____. ti_._. _ H_S•_