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June 1998 6 <br /> Energy Fuels Coal, Inc. 1997 Annual Hydrology Report <br /> Ground Water <br /> Field and laboratory data collected from monitor wells MW-8, MW-10, MW-16, MW-23, <br /> and MW-65 are summarized as described below. All data was collected in compliance with <br /> the approved monitoring program. <br /> Water quality data for wells 10, 16, 23 and 65 are shown on Tables 5, 6, 7 and 8, <br /> respectively. Water quality samples are not obtained at MW-8 as described in the permit <br /> application. As mentioned in the previous AHR, MW-10 was mined-through. Observations <br /> during the period of this report show the well is dry and draining into the mine openings. <br /> A review of monitoring data for each well through the period of this report indicate that <br /> water quality data are consistent with previous reporting periods. Water quality in MW-16 <br /> shows slight improvement. The water quality in MW-23 is consistent with previous reporting <br /> periods. At MW-65, the data shows a moderate increase in the amount of nitrogen ammonia. <br /> Additional monitoring will show if this is a sustained trend. Water quality in all wells remains <br /> within acceptable ranges for material damage criteria. <br /> Well levels for all monitoring wells are summarized on Table 4, and water level data are <br /> presented graphically for the five monitor wells on Figures 3, 4, 5, 6, and 7. <br /> A review of water levels data shows steadily declining water levels at MW-23; seasonally <br /> fluctuating levels at MW-16; and stable levels at MW-65. Well MW-8 was mined-through in <br /> 1993 and immediately went dry. Subsequent monitoring showed that the borehole had <br /> collapsed to a point 336 feet below the surface. The water level recovered and has held at <br /> approximately 280 feet below the surface since early 1996. This sustained recharge of the <br /> well may indicate that sub-surface conditions have stabilized. <br /> The approved ground water monitoring program adequately monitors potential impacts of <br /> mining on the ground water system. The data collected through the period of this report <br /> indicate that no significant ground water impacts have occurred as a result of mining. <br />