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Homestake Mining Company May 10,2019 <br /> Regular(112d)Operation Reclamation Permit Application Package <br /> reduction BMPs will continue to be developed and refined, but are anticipated to include <br /> the following: <br /> o Continued operation of reagent injection systems to achieve insitu source load <br /> reduction, including extraction/injection well operation and use of existing <br /> phosphate dosing system. <br /> o Ongoing maintenance and potential expansion of reagent injection piping and well <br /> network. <br /> o Potential installation of additional passive treatment technologies, such as <br /> engineered treatment cells, or similar. <br /> o Potential installation of water segregation systems, such as French drains at the <br /> toes of the IRD and TCRD for water capture and passive treatment. <br /> Existing roads and drainage features within this operable unit are located on private property and <br /> will remain open to accommodate general site access and erosion necessities. <br /> The reclamation areas will be regraded to the final topography shown on Exhibit F Map F-0513. <br /> 5.6. Operable Unit 6: Sandstone Quarry <br /> The current topography for the Sandstone Quarry is shown on Exhibit F Map F- 06A. <br /> 5.6.1. Previous Reclamation <br /> As the Minerals Program Inspection Report performed on July 25, 2018 (CDRMS, 2018b) <br /> acknowledged, the sandstone quarry area is in final reclamation. The area has been regraded <br /> and reseeded, as shown on Exhibit F Map 06A. Vegetation is well established over most of the <br /> area. <br /> 5.6.2. Proposed Reclamation <br /> The following reclamation activities are proposed within the Sandstone Quarry: <br /> • The upper northeast slope will be logged and clear-cut to allow for grading and <br /> revegetation. <br /> • There is a small portion of the slope at the northeast end of the quarry will be regraded. <br /> The final slope will be created by pushing down the rocky outcrop material. <br /> Existing roads and drainage features within this operable unit are located on private property and <br /> will remain open to accommodate general site access and surface water management. <br /> The reclamation areas will be regraded to the final topography shown on Exhibit F Map 06B. <br /> 5.7. Operable Unit 7: Limestone Quarry <br /> The current topography for the Limestone Quarry is shown on Exhibit F Map F-07A. <br /> EXHIBIT E-RULE 6.4.5(AMENDED RECLAMATION PLAN) Page 72 <br /> HOMESTAKE MINING COMPANY <br />