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1 <br />' Summar Hydrological Summary of Quarterly e y yd ological Monitoring <br />' Monitoring Activities <br />This report summarizes the quarterly monitoring activities at Energy Fuels Resources (USA) <br />' Inc.'s ("EFRI's") Whirlwind Mine (the "Mine"), as required by the approved Environmental <br />Protection Plan and Attachment B of the Bureau of Land Management's (the `BLM's") Decision <br />Record, Finding of No Significant Impact, and Final Environmental Assessment for the <br />Whirlwind Mine Uranium Mining Project (the "EA"). The following field monitoring activities <br />were performed during the third quarter of 2015 (July through September 2015) at the Mine: <br />' • Quarterly water level/flow measurements and field parameters were taken at MW -1, DP <br />Spring and PR Spring on August 5, 2015. <br />' • Annual water samples were collected at PR Spring, MW -1, and the Rajah 49 Thornton <br />Portal (also referred to as the Rajah Spring) during the above sampling event. <br />• Annual Seeps and Springs Survey <br />' Whirlwind Mine Treatment Plant <br />' During periods when the treatment plant is in operation, mine water from the Mine is pumped to <br />the surface, stored in a water tank, treated and discharged to the middle tributary of Lumsden <br />Creek. Discharge of treated water from the Mine is allowed in accordance with the Colorado <br />Wastewater Discharge Permit System, Permit No. CO -0047562. <br />EFRI has suspended use of the Mine water treatment plant until such time that mining operations <br />resume. No water has been pumped from the Mine since December 2009, and Mine water has <br />been allowed to accumulate in the Mine workings. Refer to Appendix 1, Attachment 1 of this <br />report for a summary of mine water treatment. <br />' Whirlwind Mine and Packrat Mine <br />' The inflow within the Mine decline cannot be measured directly, because it occurs over <br />approximately 100 feet from the entrance of the decline and within the drifts. The water collects <br />in the mine sump, and is subsequently pumped into the untreated water tank on the surface when <br />' the Mine is operating. During periods of non -operation, the groundwater inflow can be <br />calculated based on the approximate elevation level of accumulated mine water, and the void <br />volume of the workings. <br />Access to the Mine decline was restricted during the third quarter of 2012. As a result flow rate <br />and field parameter measurements were also put on hold until such time that the Mine is <br />' reopened. Historical flow rates and field parameters from the Mine decline water are included in <br />Appendix 1, Attachment 2. Analytical data from the previous samples collected from the Mine <br />' are summarized in Appendix 2, Table 1. <br />1 <br />