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Cross Gold Mine <br />December 2024 U-3 <br /> <br /> <br /> <br /> <br />Prior to use, each pending EPF will be certified via a technical revision with the minimum requirements <br />outlined below. The EPF certification process will entail approval of a design and construction plan by <br />CDRMS followed by an as-built of the EPF. On a case-by-case basis, construction reporting of <br />pertinent QA/QC data will be provided. CDRMS will be informed of all EPF construction schedules and <br />is welcome to inspect any EPF construction. <br />Non-fuel Chemical Storage Area: This EPF certification shall include all designs and specifications of <br />the storage area. Details of floor and wall specifications, lining and/or sealing against chemical spills, <br />and storage volume demonstrations will be provided. <br />Surface Water Controls: This EPF certification shall include all designs and specifications of the <br />surface water controls. Details of berm specifications, ditch dimensions, material details, and hydrologic <br />calculations will be provided. <br />Water Lines: This EPF certification shall include all designs and specifications of the water lines for <br />mine water. Details of pipe specifications, routing, sub-grade preparation, maintenance requirements, <br />and flow capacity will be provided. <br />Water Ponds and Tanks: This EPF certification shall include all designs and specifications of the <br />water ponds and tanks onsite. Details of tank specifications, maintenance requirements, and storage <br />capacity will be provided. <br />Water Treatment Facility: This EPF certification shall include all designs and specifications of the <br />water treatment facility. Details of tank specifications, maintenance requirements, reagent or <br />component usage, backup systems, and throughput capacity will be provided. <br />Ore Storage Building: This EPF certification shall include all maps and drawings of the facility, <br />detailed information regarding floor and wall specifications, lining specifications and installation as well <br />as all leak testing. <br /> <br />For all EPFs that have not been built at the time of this application, it is anticipated that they will be built <br />in the summers of 2025, 2026, and 2027, when weather facilitates construction. As-builts for new <br />facilities certified by a professional engineer will be provided to CDRMS following construction. <br />Minimum standard construction steps for liners and pipes installed at Cross Gold Mine are outlined <br />below. These are applicable to any new liner or pipe installation at Cross Gold Mine. <br /> Liner Construction – Minimum Standards <br />Prepare subgrade by excavating to the depth required for base material as required on design details. <br />Place base material as required by designs. Install liner over the designated area, according to liner <br />manufacturer specifications. Anchor liners as required by the manufacturer.