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2016 Reclamation Cost Estimate Update — Climax Mine <br />The 4 Dam Seep Pump Station, Robinson Seep Pump Station, Storke Wastewater Treatment Plant, 5 <br />Shaft Pumping System, and Warren's Pump Station, amongst others, will remain post closure for either <br />continuation of water management. 3 Dam Pump Station is scheduled for demolition on or before 2026 as <br />Mayflower TSF rises. <br />2.26 Disposal of Reagents <br />TR -24 Section T-3.5 describes that all chemicals not to be used in the long-term water treatment <br />operations "would be used or removed from the site. Mixed chemicals such as Nokes Reagent and NaCN <br />in solution would be used in the milling process until depletion of the supplies. The distributor [will] be <br />contacted to assume possession of unmixed and uncontaminated chemicals, and the material [will] be <br />transported off-site in the same manner that it was received at the site." Further, TR -28 presents a current <br />list of reagents being used at the mine. Table T -A-1 provides chemical types, specific product names, <br />storage container types and volumes. For the purposes of this cost estimate update, we have generally <br />assumed that 75% of the chemical will be used up, resulting in 25% of the volumes in Table T -A-1 <br />requiring disposal. <br />2.27 Maintenance and Environmental Control <br />AM -06 provided for a significant amount of general maintenance and environmental control activity site - <br />wide during the post production 4 -year reclamation process. This cost item remains unchanged even <br />though some activities are included on a facility -specific basis for some of the other site reclamation <br />projects. <br />7 November 2016 (revised August 2018) <br />