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TABLE 1 (continued) Casing Depth Groundwater LPH Concentration(pg1L) Well Elevation to Water Elevation Thickness Ethyl- No Date (ft msl) (ft) (ft msl) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE RW2 08/02/94 8 13 28 65 -20 52 000 11/01/94 2899 -2086 000 -- -- -- -- __ 02/17/95 2644 -1831 000 220 680 460 1,400 11,000 -- 05/11/95 2383 -1570 000 350 670 560 1,500 12,000 -- 08/24/95 2519 -1706 000 200 420 430 1,000 12,000 -- 10/19/95 25 66 -1753 000 240 360 430 1,200 9,500 <50 02/13/96 2342 -15 29 000 170 370 400 1,100 11,000 -- 04/18/96 2110 -1297 000 180 280 350 880 9,600 74 08/08/96 2228 -1415 000 160 360 470 1,100 7,800 <50 11/04/96 2268 -1455 000 230 180 460 980 10,000 290 02/03/97 1822 -1009 000 170 120 270 640 6,100 240 05/08/97 676 1775 -1099 000 160 130 330 540 7,400 260 08/26/97 1953 -12.77 0.00 190 170 320 450 7,000 110 RW3 05/22/90 889 3095 -2206 000 16,000 41,000 5,500 31,000 160,000 -- 12/19/90 3302 -23 68 0 61 Not sampled-LPH 01/30/91 3373 -2412 098 Not sampled-LPH 05/02/91 3275 -2347 054 Not sampled-LPH 07116-17191 3372 -2449 047 Not sampled-LPH 10/15/91 35 27 -2558 110 Not sampled-LPH 01/28/92 3269 -2370 014 Not sampled-LPH 04/30/92 3227 -2334 006 Not sampled-LPH 08/13/92 3467 -2550 039 Not sampled-LPH 10/08/92 3536 -2606 056 Not sampled-LPH 02/23/93 3134 -2245 000 4,100 4,300 1,600 8,300 47,000 -- 05/18/93 3002 -2113 000 19,000 22,000 3,100 17,000 90,000 -- 08/22/93 3060 -2171 000 18,000 22,000 2,800 16,000 110,000 -- XIS73942Q&97 Tl ! Page 19