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Privileged and Confidential—Attorney Client Communication Geosyntec <br /> consultants <br /> Process Treatment Objective , c o onsiderations and Items <br /> urther Evaluated <br /> cold climates(Reference Guide to <br /> Treatment Technologies for <br /> Mining-Influenced Water,2014) <br /> • Clogging: reduce by adding inert <br /> gravel to reduce compaction;waste <br /> rock may be a viable and cost <br /> effective option if a metal leaching <br /> test indicates suitability; recycling <br /> systems in compost-based and <br /> flushing circuits in rock based can <br /> be used to remove buildup <br /> (Reference Guide to Treatment <br /> Technologies for Mining- <br /> Influenced Water,2014 <br /> Pond#3 • Anaerobic wetland polishing step . Sand, woodchips, corn stover <br /> Anaerobic . Dissolved metal and solid removal <br /> Wetland <br /> • Oxidize water a Last section of Pond#3 wetland <br /> Aerobic • Polishing filtration of metal will be converted to aerobic <br /> Wetland/ precipitates conditions for oxidation of water <br /> Outfall and final precipitation of remaining <br /> 002A metals—assume gravel and larger <br /> rocks <br /> Treatability Study Work Plan 13 February 8,2018 <br />