2011-03-14_REVISION - M1977493 (57)

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Permit Amendment (AM-06) - Climax Mine CM0000481 maintained by the site. These data sheets list permissible exposure limits, monitoring and measurement procedures, health hazard information and exposure effects, recommended medical procedures for human exposure, emergency first aid procedures, personal protection, leak and spill procedures, and waste disposal methods. More detailed information and site specific handling procedures are discussed in Section T-4 and in the SPCC/MCP. T-4 Designated Chemicals and Materials Handling The Climax SPCC/MCP provides a consolidated plan for the handling of designated chemicals and process water at the Climax Mine. As stated previously, the SPCC/MCP is kept in the environmental offices at Climax. The SPCC/MCP does not address acid-forming materials at Climax. The SPCC/MCP has been certified and meets the requirements of the CDPHE, Water Quality Control Division and the EPA under the Water Pollution Control Act (1972). This plan closely parallels the EPP. Procedures for the disposal, decommissioning, detoxification or stabilization for designated chemicals and toxic or acid forming materials and measures taken to prevent unauthorized release of pollutants and acid mine drainage to the environment, and reclamation and closure practices for designated chemicals, and toxic or acid-forming materials are discussed in the following sections. T-4.1 Disposal, Decommissioning, Detoxification or Stabilization T-4.1.1 Designated Chemicals Handling, use, storage, and containment of each designated chemical is discussed in detail in the SPCC/MCP. This plan references materials handling and containment practices. This plan is reviewed periodically and updated as necessary. T-4.1.1.1 Temporary Cessation/Prolonged Lack of Mineral Production Under the scenario of formal temporary cessation or periods of prolonged lack of mineral extraction and production, designated chemicals at Climax would be used or removed from the site. Mixed chemicals such as Nokes Reagent and NaCN in solution would be used in the milling process until depletion of the supplies. The distributor would be contacted to assume possession of unmixed and uncontaminated chemicals, and the material would be transported off-site in the same manner that it was received at the site. Those designated chemicals used in the water treatment system at Climax would remain at the site and would continue to be used. Water treatment and discharge would not cease under these scenarios. If unmixed chemicals were contaminated or the distributors were to decline possession, then detoxification or stabilization and disposal would be managed pursuant to solid and hazardous waste regulations. T-4.1.1.2 Final Closure Upon final closure at the conclusion of operations at Climax, designated chemicals will be handled in similar fashion as under the scenario described above. The exception is that lime, sulfuric acid, and flocculant used in the water treatment process will remain at the site until no longer required in the water treatment process. Removal and disposal of water treatment chemicals will occur as discussed for mill process chemicals during periods of temporary cessation or prolonged lack of mineral production. T-4.1.2 Acid-Forming Materials and Acid Mine Drainage The Climax ore body beneath Bartlett Mountain contains unoxidized sulfides that, in the presence of oxygen, water, and bacteria, have the potential to become an acid-forming material as defined in Rule 1, Section 1.1 (1). Likewise, waste rock materials deposited in McNulty OSF, North 40 OSF, and tailing material deposited into the TSFs also contain material with acid-forming potential. Climax concurred with this fact in its response to the DRMS (August 31, 1994) when it accepted the DRMS determination that Climax was a DMO under the amended rules. In addition, water that percolates through the open pit area Exhibit T T-9 May 2010