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4.4 Soil Excavation and Stockpile Areas <br /> A majority of the Revenue Mine surface facility is located on existing disturbance from historical <br /> mining activities. Historically, topsoil was not salvaged. For current excavation and earth <br /> moving activities,topsoil will be stripped from areas where it is identified prior to disturbance. <br /> Details of the existing site soils are presented in Exhibit I. <br /> Soil will be stripped as required for mine activities and will be directly placed on final waste pile <br /> surfaces as they are constructed. Topsoil stockpiled on site will be placed in one of two <br /> designated areas. The first area is immediately uphill of the Mine Water Pond(Pond 91). This <br /> topsoil stockpile area will be used while the Revenue TSF is being built. Once the Revenue TSF <br /> at capacity, an area on the top of the Revenue TSF will be used to store topsoil, if needed. <br /> Topsoil that must be imported to complete reclamation will be brought to site at the time it is <br /> needed to satisfy the reclamation requirement of a minimum of 6 inches over the reclaimed areas <br /> that are to receive topsoil and vegetation. These calculations are described in detail in Exhibit E. <br /> Topsoil will be tested prior to being accepted for use on the site to ensure it is suitable for <br /> reclamation purposes and to confirm it is free of contamination that could impact the <br /> environment. <br /> 4.5 Fuel and Oil Storage Areas and Reagent Storage <br /> Diesel fuel is stored on site in two, 10,000 gallon steel tanks located near the Mill Portal as <br /> shown on Map C-la. Unleaded gasoline will also be stored on site in one, 1,000 gallon tank next <br /> to the diesel fuel storage. The diesel tanks will be used to supply fuel to the on-site mobile <br /> equipment and backup generators for the power outages, if needed. Secondary containment is <br /> provided for all petroleum products. A Spill Control, Containment, and Contingency (SPCC) <br /> Plan for storing and using petroleum products is in place and has been included in Appendix 1. <br /> Mill chemicals and reagents will be in the Reagent Room of the mill for use in the processing of <br /> ore. The handling, storage and disposal of these chemicals is addressed in Exhibit U and the <br /> Material Containment Plan included in Appendix 1. <br /> 4.6 Mine Equipment Storage and Shop Building <br /> Two equipment storage warehouses are planned for the surface and will be 50'x60'. One <br /> warehouse was constructed on the east end of the property in 2021 and another is planned to the <br /> north of the admin building. Equipment will be serviced in the underground facilities <br /> immediately west of the mill. Additional underground equipment may be stored in the railyard <br /> located to the east of the admin building. The location of surface facilities is shown on Map C- <br /> 1 a. <br /> 4.7 Personnel Facilities and Compressor Building <br /> There are two personnel facilities as part of the Revenue Mine. The first is the mine office/dry <br /> room located just outside the portal. It is a steel structure on a 6-inch concrete foundation. The <br /> second facility is the set of portable lineout trailers. These trailers are temporary structures and <br /> are each 40' x 40'. They do not have a foundation. Immediately south of the dry-room is a 50' x <br /> 20' building that houses the air compressors for the mine; it sits on a 6-inch concrete foundation. <br /> Revenue Mine <br /> Amendment 02 D-21 <br /> Updated August 2022 <br />