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ti .. <br /> Summary of Quarterly Hydrological Monitoring <br /> Monitoring Activities <br /> This report summarizes the quarterly monitoring activities at Energy Fuels Resources(USA)Inc.'s <br /> ("EFRI's") Whirlwind Mine (the "Mine"), as required by the approved Environmental Protection <br /> Plan and Attachment B of the Bureau of Land Management's (the `BLM's") Decision Record, <br /> Finding of No Significant Impact, and Final Environmental Assessment for the Whirlwind Mine <br /> Uranium Mining Project (the "EA"). The following field monitoring activities were performed <br /> during the first quarter of 2022 (January through March 2022) at the Mine: <br /> Quarterly water level/flow measurements and field parameters at the monitoring well, DP <br /> Spring and PR Spring. <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 been <br /> allowed to accumulate in the Mine workings. Refer to Appendix 1, Attachment 1 of this report <br /> 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 calculated <br /> based on the approximate elevation level of accumulated mine water, and the void volume of the <br /> 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 reopened. <br /> Historical flow rates and field parameters from the Mine decline water are included in Appendix <br /> 1, Attachment 2. Analytical data from the previous samples collected from the Mine are <br /> summarized in Appendix 2, Table 1. <br /> Characterization of mine water in the Packrat Mine could not be conducted, because the mine is <br /> not yet accessible. Appendix 1, Attachment 3 of this report is reserved for field data collected from <br /> the Packrat Mine at such time that it becomes accessible and is monitored. <br /> 1 <br />