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Prince Albert Mine 110(d) Permit Application Exhibit C <br />C (b.5) Ventilation Borehole(s) <br />One 48" to 84" diameter ventilation borehole is currently planned for the Prince Albert Mine, if additional <br />underground ventilation capacity is required. This borehole will intersect the underground development <br />headings from the surface to provide the necessary exhaust ventilation, and may be used as an emergency <br />egress point for the safe operation of the mine. The ventilation borehole will be cased for the first 10 feet <br />and sealed at the surface, with additional casing installed and grout sealed during placement if the <br />borehole passes through any aquifers to prevent intermixing of waters between formations. Alternatively, <br />the ventilation borehole may be cased for 4 /5ths, or more, of the total depth if it is used as a secondary <br />escapeway. A work pad area 66 ft x 66 ft will be cleared on the ground surface to accommodate the <br />borehole construction equipment and materials, and a 20 ft. X 20 ft. concrete pad may be constructed. <br />This same area will be used for the installation of the ventilation fan and a portable generator (if an <br />electric fan is used) after the borehole is completed. Each borehole pad area will be accessed by a 10 ft <br />wide roadway. Options for the construction of the borehole include, but are not limited to, the following: <br />Drilling and back - reaming with raise -bore equipment; excavating a conventional raise from the <br />underground workings; or using a surface drill rig and drop -raise excavation technique. <br />C (b.6) Processing Facilities <br />There will be no processing facilities on site. All mine -run ore will be loaded into over - the - highway <br />trucks and transported to a milling facility described under Section U (6.a.2) "Ore Transportation." <br />C (b.7) Water Supply <br />Water for mining operations is trucked in and stored in a 1000 to 3000 gallon tank. As underground <br />development progresses, a water drop will be installed southeast of the decline (see Exhibit E, Figure E.1 <br />"Mine Plan Site Map "). This water drop will consist of a 500 to 3000 gallon tank feeding non - potable <br />water to the underground workings through a piping system installed down an existing surface <br />exploration drill hole. The tank will be located on the surface within a bermed area for spill containment <br />and runoff control. Potable water will be supplied in individual containers for human consumption. <br />C (b.8) Trash / Refuse Handling & Disposal <br />Non - hazardous trash and refuse generated during the surface and underground mining operations will be <br />transported to, and stored in, standard covered trash containers with liners. The trash containers will be <br />stored in the surface storage container / cargo van and will be periodically transported off -site for proper <br />disposal in a sanitary landfill when the containers are full. <br />Any potential hazardous waste material that may be generated will be stored in a proper container until it <br />can be properly evaluated and disposal, if necessary, can be arranged at an appropriate disposal facility. <br />Rimrock Exploration & Development Page 6 of 39 <br />