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<br /> <br /> <br />SSR Mining Inc. PAGE 2/5 <br />filtrate tank and returned to Cell 0 or Cell 4, where it will continue through the existing settling <br />ponds. The MMF system will include a 6,000-gallon backwash tank for storing backwash water. <br />Solids containing iron and aluminum, generated during MMF backwash, will be directed to <br />geotubes for dewatering. Once adequately dried, the geotubes will be transported offsite for <br />disposal. <br /> <br />If effective, feasible, and safe operation are demonstrated at the bench scale, ozone treatment <br />may also be incorporated into the system. Ozone will be generated on-site and introduced to the <br />water stream after filtration. All ozone-related components will be housed in a dedicated shed. <br /> <br />The filtration system will be powered by an on-site 15kW propane generator. An additional 60- <br />100kW generator will be added to the system for ozone generation if required. Initial construction <br />plans are subject to change based on system performance. A preliminary flow diagram for the <br />filtration system is provided below; ozone components are not included, as their design remains <br />under feasibility review. <br /> <br /> <br /> <br />3. Please provide details on the size/capacity of geotubes and the anticipated usage rate <br />that the geotubes will need to be replaced. <br /> <br />The size and capacity of the Geotubes will be determined by the volume of solids generated by <br />the filtration system and the hauling truck specifications. Preliminary mass balance calculations <br />estimate that approximately 828 kilograms (1825 lbs) of dewatered solids (equivalent to 497 <br />kilograms/1096 lbs of dry solids) will be produced on-site over a one-month period. <br /> <br />Based on the preliminary mass balance calculations it is anticipated that the geotube will be <br />changed once per month (e.g. a small 3’x4’ geotube is rated to contain 1,440 lbs of sediment). <br />Capacity and sizing of the geotubes are subject to change based on system performance and <br />handling/transport capabilities. Final sizing and capacity will be confirmed once the system is <br />operational. <br /> <br />New geotubes will be utilized for each cycle, as used geotubes will be disposed of along with <br />the accumulated solids. <br /> <br />4. In the event a geotube is ruptured, please discuss what measures will be in place to <br />ensure all materials are contained to the Carlton Tunnel rockfill platform. <br /> <br />Containment berms will be constructed on three sides of the geotubes to ensure that, in the <br />event of a rupture, no material escapes the platform and any drainage flows back into the settling <br />Docusign Envelope ID: 2D18F739-39D8-4955-91B8-CEF73FA3A2BC