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m 9 m ! m = m TABLE 1 (continued) Casing Depth Groundwater LPH Concentration( /L) Well Elevation to Water Elevation Thickness Ethyl- No Date (ft ms]) (ft) (ft ms l) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE MW8 08/17/89 778 2549 -1771 000 620 10,000 5,500 25,000 72,000 -- 12/19/89 2660 -18 82 000 190 2,800 1,100 5,300 21,000 -- 03/21/90 27 11 -19 33 000 880 11,000 4,400 22,000 63,000 - 05/17/90 27 87 -2009 000 520 5,500 3,900 20,000 67,000 - 09/25/90 29 17 -2139 000 -- -- -- -- -- -- 12/19/90 29 13 -2135 000 -- -- -- - -- - 01/30/91 Dry -- -- -- -- -- 05/02/91 2939 -2161 000 830 5,900 4,900 23,000 57,000 - 07116-17/91 29 90 -22 12 a 000 -- -- -- -- -- -- 10/15/91 Dry -- -- -- -- -- 01/28/92 2931 -2153 000 -- -- -- -- - -- 04/30/92 2884 -21 06a 000 -- -- -- 08/13/92 2991 -22 13 a 000 -- -- -- -- -- -- 10/08/92 Dry -- -- -- -- -- 02/23/93 28 13 -2035 000 1,100 5,400 3,300 11,000 49,000 -- 05/18/93 2671 -1893 000 850 5,800 3,400 13,000 53,000 -- 08/22/93 26 95 -19 17 000 650 4,400 3,500 13,000 52,000 -- 12/30/93 2639 -1861 000 820 6,200 4,200 14,000 50,000 -- 02/17/94 26 10 -1832 000 510 3,800 3,400 13,000 44,000 -- 05/10/94 25 83 -1805 000 520 4,200 3,800 13,000 49,000 - 08/02/94 27 29 -1951 000 290 1,900 1,900 7,500 28,000 -- 11/01/94 2764 -19 86 000 460 1,700 3,700 14,000 56,000 -- 02/17/95 2500 -1722 000 500 3,900 4,000 15,000 72,000 -- 05/11/95 2242 -1464 000 680 5,900 4,700 19,000 80,000 - 08/24/95 2377 -15 99 000 520 4,700 4,800 17,000 65,000 -- 10/19/95 2437 -1659 000 150 1,400 2,400 8,600 52,000 <250 02/13/96 22 15 -1437 000 190 2,100 2,600 10,000 57,000 -- 04/18/96 1980 -1202 000 130 1,700 2,400 9,400 43,000 <125 08/08/96 21 11 -1333 000 200 2,700 3,300 13,000 46,000 <250 11/04/96 2155 -1377 000 160 1,700 2,700 9,600 48,000 <250 ri 573742 Q398 i i 1 E ter 9