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April 11,2025 Mr.Lucas West <br /> Page 2 of 3 <br /> • Interflow between the alluvial aquifer and the Rito Seco will be restored to <br /> conditions similar to pre-mining conditions, allowing more water to remain in the <br /> Rito Seco for beneficial use downstream. <br /> • The volume of groundwater requiring treatment will be substantially reduced(to a <br /> predicted 10 percent of current rates), <br /> • A reduction in the production of the brine/treatment solids generated from the <br /> treatment may allow for different disposal options, if the brine/treatment solids no <br /> longer have to be discharged to the tailings impoundment, that would allow for <br /> eventual closure of tailing facility, and <br /> • Interflow between the alluvial aquifer and the Rito Seco will be restored to <br /> conditions similar to pre-mining conditions. <br /> Primary Topics Addressed in Permit Amendment <br /> 1. Provide permit amendment application and Exhibits as required for the permit <br /> amendment. <br /> 2. Minor updates to the following Exhibits: Exhibit A, Exhibit C, Figure C-1 Mining Site <br /> Map, Exhibit E, and Exhibit M. <br /> 3. Amend Exhibit G — Water Information to incorporate changes resulting from the slurry <br /> wall installation. <br /> 4. Amend Exhibit L — Updated Reclamation Costs to reflect current site conditions and <br /> remaining reclamation efforts required for closure. <br /> 5. Amend Exhibit U — Designed Mining Operation Environmental Protection Plan to <br /> contain information on the groundwater modeling, slurry wall construction, and ongoing <br /> site monitoring. <br />