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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS May 1990 Through August 2005 Former BP Oil 11192 I Date TQC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE ITBA Comments Sampled Elevation Water Thickness water In 8260'1' benzene Xylenes 8021B 8260B 8260B Elevation Elevation 11 (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) (µg11) (µg/1) (µg/1) (µg11) (µg/1) (µg/1) (µg11) MW4 continued 08/19/92 6 75 -- -- _. __ Dry 0p/18/92 675 -- -- -- -- - -- - -- -- -- -- Dry 17/09/92 675 -- -- -- -- _- _ -- __ -- Dry 0ti/11193 6 75 -- -- __ __ -_ -- D ry 06/15/93 675 2801 000 -2126 09/15/93 6 75 28 50 000 -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 -- -- _ 04/01/94 675 2745 000 -2070 088 -- 07/27/94 6 75 2746 000 -2071 -001 190 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 11/30/94 6 75 2797 000 -2122 -051 02/15/95 675 2685 000 -20 10 1 12 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<l 0 04/21/95 675 2477 000 -1802 2 08 07/19/95 675 24 07 000 -1732 070 ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<1 0 P 10/20/95 675 2450 000 -1775 -043 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 ND<5 0 -- Pre-purge D 10/20/95 675 2450 000 -1775 -043 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<l 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 04/23/96 675 21 13 000 -14 38 337 ND<500 -. ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<10 -- -- 07/12/96 6 75 2042 000 -1367 071 10/18/96 675 1963 000 -1288 079 130 ND<0 5 ND<l 0 ND<1 0 ND<l 0 ND<I0 02/26/98 6 75 13 01 000 -626 662 ND<50 -- ND<0 5 ND<l 0 ND<l 0 ND 07/07/98 6 75 1261 000 -586 040 ND<50 -- ND<0 5 ND<l 0 ND<l 0 ND<l 0 ND<10 -- 01/19/99 6 75 1459 000 -784 -198 ND<50 -- ND 07/14/99 6 75 13 55 000 -680 104 ND<50 -- ND<1 0 ND<l 0 ND<l 0 ND<1 0 83 -- 10,107/99 6 75 1508 000 -833 -153 220 -- ND<1 0 ND<l 0 ND<l 0 ND<1 0 170 11192 • Pag20 . s