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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through November 2005 Former BP 01111192 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) (µg11) (µg11) (µg/1) (µg11) (µg11) (µg/1) (4g/1) (4g/1) (µg/1) MW4 continued 12/09/91 675 Dry 03/09/92 6 75 -- -- -- -- -- -- -- -- -- -- -- Dry 06/19/92 6 75 -- -- -- -- -- __ pry 09/18/92 675 - -- -- .- p ry 12/09/92 675 -- -- -- -- -- __ ._ ._ __ ._ Dry 03/11/93 675 -- -- -- -- - -- -- -- -- -- -- DD' 06/15/93 675 2801 000 -2126 09/15/93 6 75 2850 000 -2175 -049 12/22/93 6 75 2833 000 -2158 0 17 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- -- -- 04/01/94 6 75 2745 000 -2070 0 88 07/27/94 675 2746 000 -2071 -001 190 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 -- 11/30/94 675 2797 000 -2122 -051 02/15/95 675 2685 000 -20 10 1 12 ND<50 -- ND<O 50 ND<0 50 ND<0 50 ND<l 0 -- -- -- 04/21/95 675 2477 000 -1802 208 07/19/95 675 2407 000 -1732 070 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- -- -- P 10/20/95 6 75 2450 000 -1775 -043 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<5 0 -- -- Pre-purge D 10/20/95 6 75 2450 000 -1775 -043 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<5 0 -- -- P 04/23/96 6 75 21 13 000 -1438 337 ND<500 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 14 -- -- Pre-purge D 04/23/96 6 75 21 13 000 -1438 337 ND<500 -- ND<0 5 ND<0 5 ND<0 5 N1X0 5 ND<10 -- -- 07/12/96 675 2042 000 -1367 0 71 10/18/96 6 75 1963 000 -1288 0 79 130 -- ND<0 5 ND<1 0 ND<l 0 ND<1 0 ND<10 -- -- 02/26/98 6 75 1301 000 -626 662 ND<50 -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 -- -- 07/07/98 675 1261 000 -586 040 ND<50 -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 -- -- 01/19/99 6 75 1459 000 -784 -198 ND<50 -- ND<1 0 ND<1 0 ND<1 0 ND<1 0 26 -- -- 11192 Page 6 of 20