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nature of the watet• encountered such as mine pools, draining drill holes or <br />airshafls, or inflows from natural locations. Quantity outputs should be noted as <br />1ve11 as any remedial actions taken such as sealing, etc. <br />Energy Fuels agrees to this commitment {see Attachment A for details). <br />2) Energy Fuels will place tracer or dye packs in mine pools that collect perennial <br />flotivs to monitor for impacts to surface tivaters. Visual inspections of the DP and <br />PR springs shall be done quarterly for the fast 5 quarters. Once that bench mark <br />is achieved, DRMS and Energy Fuels shall review the data to determine if sampling <br />intervals can be altered. <br />Energy Fuels agrees to conduct monitoring of the mine water, DP and PR Spring, <br />and Monitoring Well W-l as described in Attachment A, which is a revision to the <br />Ground Water Control and Monitoring Plan in Exhibit T. <br />Energy Fuels proposes to have an experienced hydrogeology team review the <br />existing and newly collected monitoring data and develop a preliminary <br />characterization of the ground water regime and hydrogeologic conceptual model <br />for the mine site. This preliminary model would then be used to define da#a gaps <br />and to determine what field work and laboratory analyses are needed to complete <br />the study. The preliminary model and recommendations for additional studies <br />would be presented in a report to DRMS foz• review and comment. Tracer studies <br />would be one of the options evaluated for inclusion in these additional studies. <br />Please refer to the Ground Water Characterization section of Attachment A for <br />additional details. <br />If tracer studies are selected by DRMS, it will require careful planning to make sure <br />that the study provides meaningful data. in a realistic time frame. For example, <br />many dyes are absorbed by organic material and may not be suitable for this <br />application where the water could potentially seep into a vegetated area. It would <br />also be good to utilize a tracer that would provide quantifiable data and not just <br />qualitative results. <br />3) Energy Fuels must mnintnin the monitot• well for the life of the permit. Initial <br />reports shall be submitted representing eight (8), relatively equally spaced intervals <br />ovet• 1.25 years (S quarters). Once that bench tnaf•k is achieved, DRMS and Energy <br />Fitels shall t•evietiv the data to determine if sampling intervals can be altered. <br />Energy Fuels agrees to this commitment {see Attachment A for details). <br />4) Post mine monitoring shall include the monitor well and bulk head mine pool <br />oversight. The exact plun cannot be formulated until laler• dtte to changing <br />conditions within the mine's hydrology due to planned mediation of sign cant <br />sources of water inflow tht•ottgh various outlets. The plan shall be in place until the <br />projected mine pool has reached its equilibrium phis S quarters. <br />6 <br />