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Ir ENV TABLE 1 (continued) Casing Depth Groundwater LPH Concentration(pg/L) j Well Elevation to Water Elevation Thickness Ethyl- No Date (ft msl) (ft) (ft ms]) (ft) Benzene Toluene benzene Xylenes TPH-g MTBE RWl 05/I 1/95 905 25 13 -1608 000 780 4,000 1,300 4,300 32,000 -- 08/24/95 2641 -1736 000 820 4,000 1,500 4,600 24,000 -- 10/19/95 2685 -1780 000 680 3,100 1,200 3,600 25,000 <250 02/13/96 2270 -1365 000 590 2,900 920 2,700 21,000 -- 04/18/96 2229 -1324 000 510 2,500 980 2,700 23,000 <100 08/08/96 2344 -1439 000 600 3,200 1,200 3,500 20,000 <250 11/04/96 23 81 -1476 000 710 2,600 1,200 3,200 23,000 900 02/03/97 19 63 -1058 000 390 1,900 680 2,000 16,000 440 05/08/97 770 1976 -1206 000 430 2,000 860 2,300 18,000 620 08/26/97 2051 -1281 000 600 2,600 1,200 3,400 21,000 380 11/11/97 21 11 -1341 000 410 1,500 750 1,800 13,000 520 11/11/97 X25* 03/03/98 1551 -7 81 000 320 1,300 660 1,700 11,000 420 03/03/98 <33* 05/20/98 1530 -760 000 310 1,500 670 1,800 13,000 760 05/20/98 <33* 08/19/98 1675 -9 05 000 340 1,200 630 1,700 18,000 1,100 08/19/98 <40* 11/18/98 1721 -9 51 000 250 840 520 1,100 8,200 90 03/30/99 1531 -7.61 000 197 678 432 967 8,150 <20 RW2 05/22/90 8 13 2940 -2127 000 2,000 6,100 1,800 10,000 51,000 -- 09/25/90 3079 -2266 000 1,000 5,200 1,600 8,600 33,000 -- 12/19/90 3062 -2249 000 940 3,500 860 5,200 16,000 -- 01/30/91 3108 -2295 000 580 2,300 580 3,600 13,000 -- 05/02/91 3097 -2284 000 1,600 3,400 1,600 7,900 32,000 -- 07/16-17191 3195 -23 82 000 600 1,900 730 3,900 21,000 -- 10/15/91 3253 -2440 000 510 2,700 720 3,300 22,000 -- 01/28/92 3076 -22 63 000 260 1,200 590 2,500 17,000 -- 04/30/92 Not accessible -- -- -- -- -- -- 08/13/92 3247 -2434 000 130 630 280 1,100 8,500 -- 10/08/92 3303 -2490 000 130 630 250 1,400 11,000 -- 73942 Q399 T7 XLS Page 20