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jWW 1998 3 <br /> Energy Fuels Coal, Inc. 1997 Annual Hl&t46gy Rq"rt <br /> Primary uses of water at the mine are coal preparation and underground dust suppression. <br /> Historically, of the total water pumped for use at the mine, approximately 38 percent is <br /> consumed in the coal preparation plant, and 27 percent is used for underground dust <br /> suppression. The remainder of water use is attributed to pond evaporation and outside dust <br /> suppression and equipment washing. <br /> Water balance within the mine is a comparison of the consumptive use of the mine and the <br /> estimated input and output water in the water handling system., Water pumped into the system <br /> from the Corley Mine Well, shown on Table 2, totalled 40.2 ac-ft during the reporting <br /> period. The estimated consumptive use during the corresponding period was 50.3 ac-ft. Water <br /> discharged to the stream system was approximately 8.0 ac-ft. This comparison of input, <br /> consumptive use, and discharged water quantities illustrates the water balance within the <br /> mine. <br /> NPDES Discharges to Streams <br /> Water discharged to the stream system during the period of this report totalled approximately <br /> 8.0 ac-ft, as shown on to Table 3. Water discharges were treated and managed through <br /> Southfield's surface water handling system depicted on Figure 2. Discharges through NPDES <br /> outfalls were sampled and reported in accordance with the approved Colorado Wastewater <br /> Discharge permit. <br /> Water quality data for discharges to streams are summarized on Table 3. A review of these <br /> data indicate that all discharges were within NPDES permit limitation. In addition, all <br /> samples submitted for Acute WET testing from Outfall 004 were in compliance. Due to the <br /> positive WET test results from previous reporting periods, the Department of Health approved <br /> an extended WET test schedule to a semi-annual basis. These data indicate that Southfield's <br /> water treatment system effectively reduces the potential of significant impacts to State waters. <br />