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i Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS February 1990 Through June 2005 Former 76 Station 6981 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water 3n 8260B benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg/1) (µg/1) 4Lg/1) (pg/1) (µg/1) (pg/l) (ug/1) (Ng/1) VW-2 continued 03/09/04 1166 -- -- __ __ _ Dry well 06/16/04 1166 -- 000 __ __ __ _ _ -_ Dry well 09/20/04 1166 -- -- -- __ _ __ _ Dry well 12/30/04 1166 -- - -- -- -- - - - -- -- Dry well 03/24/05 1166 -- -- __ __ -- -- -- -- -- -- -- -- Dry well 06/28/05 1166 -- -- -- -- Dry well VW-3 (Screen Interval in feet 25 5-50 5) 07/24/96 -- 3934 000 -- __ ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 -- 10/23/96 - -- Sampled Semi-annually 01/21/97 -- 3651 000 __ __ ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 58 -- 07/16/97 3398 000 -- - ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 14 -- 10/15/97 -- 35 84 000 - ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 ND<2 0 12/08/97 -- 35 75 000 03/05/98 -- 3120 000 -_ __ ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 340 300 05/27/98 -- 2796 000 -- -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<2 5 ND<2 0 07/21/98 - 2807 000 -- -- ND<50 -- ND<0 50 1 7 ND<0 50 1 6 ND<5 0 ND<2 0 10/14/98 -- 29 10 000 -- __ ND<50 __ ND<0 50 ND<0 50 ND<0 50 ND<0 50 ND<2 5 ND<2 0 01/25/99 28 28 000 -- -- ND<1000 -- ND<10 ND<10 ND<10 ND<10 1300 1300 04/19/99 -- 2575 000 -- -- ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<0 50 780 890 07/15/99 - 27 18 000 -- -- ND<500 ND<5 0 ND<5 0 ND<5 0 ND<5 0 2900 4900 10/25/99 -- 2885 000 -- -- ND<250 -- 23 ND<2 5 ND<2 5 ND<2 5 1100 850 01/27/00 -- 2839 000 __ __ ND<50 - 0 6 ND<0 50 ND<0 50 ND<0 50 2400 2500 06/26/00 -- 25 58 000 -- _ ND<50 0 -- ND<O 500 0 561 ND<0 500 ND<o 500 279 384 09/22/00 1132 2800 000 -1668 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<0 50 3200 2400 6981 Page 33 of 37