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TR-34 to Permit M-1977-342 <br /> Environmental Protection Plan <br /> 6. DESIGNATED CHEMICALS AND MATERIALS HANDLING <br /> 6.1. Disposal, Decommissioning, Detoxification or Stabilization <br /> 6.1.1. Designated Chemicals Handling <br /> Mine: Designated chemicals used at the Mine are limited to the URAD WTP and are handled in <br /> accordance with procedures that have been developed and implemented as a part of <br /> Henderson's over-arching environmental and health and safety management systems. In the <br /> unlikely event of a release of a designated chemical from its storage area or area of use, it would <br /> be contained by the URAD treatment building and/or ponds. <br /> Mill: Designated chemicals used during active mining operations are handled in accordance <br /> with procedures that have been developed and implemented as a part of Henderson's over- <br /> arching environmental and health and safety management systems. In the unlikely event of a <br /> release of a designated chemical from its storage area or area of use, it would be contained by <br /> the TSF. <br /> 6.1.1.1. Temporary Cessation <br /> Mine: Under the scenario of temporary cessation,the URAD WTP would continue to operate and <br /> the chemicals would, therefore, not need to be disposed of or otherwise decommissioned, <br /> detoxified or stabilized. <br /> Mill: Under the scenario of temporary cessation, those designated chemicals at the Mill site <br /> would be used, removed from, or stored at the site. Mixed chemicals such as Syntex (sodium <br /> lauryl sulfate and water) would be used in the milling process until depletion of the supplies.The <br /> manufacturer would be contacted to assume possession of any unmixed and uncontaminated <br /> chemicals, and the material would be transported off-site in the same manner that it was <br /> received at the site. As an alternative, the materials, such as (but not limited to) pine oil would <br /> be stored on site until operations resumed. <br /> If any unmixed chemicals were contaminated or the manufacturers were to decline possession, <br /> then detoxification, stabilization or shipment offsite would be performed in compliance with <br /> federal, state, and local regulations using a licensed and experienced professional contractor and <br /> transporter to remove the chemicals from the site. <br /> With regard to water treatment chemicals, the Mill WTP would continue to operate under the <br /> scenario of temporary cessation and the chemicals would, therefore, not need to be disposed of <br /> or otherwise decommissioned, detoxified or stabilized. <br /> 6.1.1.2. Final Closure <br /> Mine: Upon final closure, the URAD WTP would continue to operate and the chemicals would, <br /> therefore, not need to be disposed of or otherwise decommissioned, detoxified or stabilized. <br /> Mill: Upon final closure at the conclusion of Mill operations, removal and disposal would be <br /> performed in the same manner as for temporary cessation with the exception that no designated <br /> chemicals would be stored for future use. <br /> Climax Molybdenum Company August,2021 <br /> Henderson Operations Page 14 of 45 <br />