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TABLE 1 (continued) Casing Depth Groundwater LPH Concentration(pg/L) Well Elevation to Water Elevation Thickness Ethyl- No Date (ft msl) (ft) (ft msl) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE P2 05/20/98 679 1398 -7 19 000 8 2 <2 0 18 2 0 980 <10 05/20/98 <2 0* 08/19/98 1523 -844 000 72 <2 5 8 6 <2 5 850 <12 08/19/98 <2 0* 11/18/98 1575 -896 000 20 <5 0 10 <5 0 1,100 <25 03/30/99 1407 -728 000 <05 <05 581 <05 950 <20 05/05/99 1430 -7 51 000 <0 5 <0 5 836 <0 5 688 2 81 08/20/99 1597 -9 18 000 9 59 197 389 130 489 252 12/06/99 _- __ -- 02/29/00 -- -- _ RW 1 05/22/90 905 3074 -21 69 000 2,000 7,500 2,000 9,800 58,000 -- 09/25/90 3237 -2332 000 7,100 16,000 2,000 9,200 72,000 -- 12/19/90 3229 -2324 000 9,000 20,000 2,300 11,000 73,000 -- 01/30/91 3267 -23 62 000 4,400 13,000 1,700 8,400 57,000 05/02/91 3263 -2358 000 5,700 17,000 2,700 12,000 67,000 -- 07/16-17191 3359 -2454 000 5,100 17,000 1,700 8,100 61,000 -- 10/15/91 3402 -2497 000 7,000 21,000 2,600 12,000 93,000 -- 01/28/92 3236 -23 31 000 5,500 18,000 2,500 10,000 66,000 -- 04/30/92 -- _- -_ 08/13/92 3393 -24 88 000 4,700 19,000 2,500 12,000 92,000 -- 10/08/92 3448 -2543 000 2,200 8,400 1,500 6,600 52,000 -- 02/23/93 3169 -22 64 000 1,800 4,100 1,000 3,900 26,000 -- 05/18/93 2974 -20 69 000 1,900 7,800 1,300 5,000 36,000 -- 08/22/93 3003 -2098 000 1,800 7,600 1,500 5,800 39,000 -- 12/30/93 2938 -2033 000 1,600 2,400 1,300 3,700 20,000 -- 02/17/94 2897 -1992 000 1,000 4,000 1,100 3,600 26,000 -- 05/10/94 2853 -1948 000 1,200 5,300 1,400 5,000 34,000 -- 08/02/94 2995 -2090 000 1,300 4,700 1,400 4,800 28,000 11/01/94 3034 -2129 000 1,100 4,600 1,300 4,600 28,000 -- 02/17/95 2782 -1877 000 820 3,600 1,200 3,900 24,000 -- 05/11/95 25 13 -1608 000 780 4,000 1,300 4,300 32,000 -- 73942 Q200 Tl XLS Page 21