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. meets the requirements of the EPA under the Water Pollution Control Act (1972). This plan <br /> closely parallels the EPP. <br /> 4.1 Disposal, Decommissioning, Detoxification or Stabilization <br /> 4.1.1 Designated Chemicals <br /> Handling, use, storage, and containment of each designated chemical is discussed is detail in the <br /> SPCC/MCP. This plan references materials handling and containment practices. This plan is <br /> reviewed annually as per Section 1.1.2 and updated as necessary. <br /> 4.1.1.1 Temporary Cessation <br /> Under the scenario of formal Temporary Cessation, designated chemicals at Climax would be <br /> used or removed from the site. Mixed chemicals such as Nokes Reagent and NaCN in solution <br /> would be used in the milling process until depletion of the supplies. The distributor would be <br /> contacted to assume possession of any unmixed and uncontaminated chemicals, and the material <br /> would be transported off-site in the same manner that it was received at the site. Those <br /> designated chemicals used in the water treatment system at Climax would remain at the site and <br /> • would continue to be used. Water treatment and discharge would not cease under the scenario of <br /> Temporary Cessation. If any unmixed chemicals were contaminated or the distributors were to <br /> decline possession, then detoxification or stabilization and disposal would occur. Detoxification <br /> or stabilization and disposal would employ a licensed and experienced professional contractor <br /> and transporter to remove the chemicals from the site. <br /> 4.1.1.2 Final Closure <br /> Upon final closure at the conclusion of operations at Climax, designated chemicals will be handled <br /> in similar fashion as under the Temporary Cessation scenario. The exception is that lime and <br /> sulfuric acid used in the water treatment process also would be removed from the site as soon as <br /> they were no longer required in the treatment process. Removal and disposal would occur as <br /> discussed above for mill process chemicals during periods of Temporary Cessation. <br /> 4.1.2 Acid-Forming Materials and Acid Mine Drainage <br /> The Climax ore body beneath Bartlett Mountain contains unoxidized sulfides which, in the <br /> presence of oxygen, water, and bacteria, have the potential to become an acid-forming material as <br /> defined in Rule 1, Section 1.1 (1). Likewise, waste rock materials deposited in McNulty dump, <br /> E-Dump, and the OP dumps and tailing material deposited into the tailing impoundments also <br /> 12 <br />