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Table 2 HISTORIC FLUID LEVELS AND SELECTED ANALYTICAL RESULTS September 1996 Through February 2005 76 Station 5886 Date TOC Depth to LPH Ground- Change TPH-G TPPH Benzene Toluene Ethyl- Total MTBE MTBE Comments Sampled Elevation Water Thickness water to 8260E benzene Xylenes 8021B 8260B Elevation Elevation (feet) (feet) (feet) (feet) (feet) (µg11) Gig/1) (µg11) (µg/1) (µg11) (41) (µg11) (41) MW-8S continued 02/11/02 -100 639 000 -739 -- ND<50 -- ND<0 50 1 3 ND<0 50 1 1 ND<2 5 ND<2 0 05/02/02 -100 635 000 -735 -- ND<50 -- ND<0 50 ND<0 50 ND<0 S0 ND<0 50 ND<5 0 ND<2 0 08/01/02 -100 6 68 000 -768 -033 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND 11/20/02 -100 6 41 000 -741 027 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 02/20/03 -100 631 000 -731 0 10 -- ND<54 ND<0 50 ND<0 50 ND<0 50 ND 05/07/03 -100 - - -- -_ __ __ _ Monitored/Sampled Semt- Annually 08/04/03 -100 6 78 000 -7 78 - -- ND<50 ND<5 0 ND<5 0 ND<5 0 ND 02/11/04 -1 00 575 000 -6 75 -- ND<50 ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<2 0 05/27/04 -1 00 - __ __ __ __ Sampled Semi-Annually 08/30/04 -100 620 000 -720 -- ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND 11/23/44 -100 -- -- _ _ __ __ _ Monitored and Sampled Serru Annually 02/23/05 -100 554 000 -654 -- ND<50 -- ND<0 50 ND<0 50 ND<0 50 ND<l 0 -- ND<0 50 MW-91) (Screen Interval in feet 30 0-35 0) 04/14/99 -094 624 000 -7 18 ND - ND 1 14 ND ND -- ND 06/01/99 -094 665 000 -759 __ ND _ ND ND ND ND ND ND 08/16/99 -094 700 000 -794 -035 ND -- ND ND ND ND ND ND D 08/16/99 -094 7 00 000 -794 000 11/29/99 -094 695 000 -789 0 05 ND -- ND ND ND ND ND ND 02/28/00 -094 5 38 000 -632 0 00 ND - ND ND ND ND ND ND D 02/28/00 -094 5 38 000 -632 1 57 05/10/00 -094 626 000 -720 -088 ND ND ND ND ND ND ND 08/03/00 -094 6 88 000 -7 82 -062 ND -- ND ND ND ND ND ND 11/16/00 -094 643 000 -737 045 ND -- ND ND ND ND ND ND 5886 Page 23 of 30