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TR-34 to Permit M-1977-342 <br /> Environmental Protection Plan <br /> 5. DESIGNATED CHEMICAL EVALUATION <br /> Designated chemicals are defined in the Rule as toxic or acidic chemicals used within the <br /> Reclamation Permit area in extractive metallurgical processing, the use of which, at certain <br /> concentrations, represents a potential threat to human health, property or the environment.The <br /> designated chemicals discussed in this EPP are inclusive of those used in the extractive <br /> metallurgical processing of molybdenite ore to produce MoS2 and those used at the URAD WTP <br /> and proposed Mill WTP. <br /> The designated chemicals, listed quantities, and use concentrations are presented as the best <br /> information available at the time of the submittal of this EPP. These chemicals, quantities, and <br /> concentrations may vary based upon production needs and processes. For example, brand name <br /> chemicals such as (but not limited to) Syntex, Dowfroth 250-C Frother or Naxolate may be <br /> changed out for different brands of similar chemicals based on factors such as effectiveness, cost <br /> and availability. Changes in brands and reagent usage are a part of the production process and <br /> are not considered to be grounds for notification to the DRMS. However, notification to the <br /> DRMS will be made in the event that: <br /> • New types of designated chemicals, not discussed herein, are added to the process; <br /> • The storage location of a designated chemical is changed; or <br /> • The containment facility for a designated chemical must be modified. <br /> 5.1. List of Chemicals and Specific Locations <br /> Designated Chemicals Used at the Henderson Mine and Mill are included in Tables 5-1 and 5-2, <br /> respectively, and provide a summary of the estimated quantity, locations and fate of the <br /> designated chemicals used in processing at Henderson. <br /> Climax Molybdenum Company August,2021 <br /> Henderson Operations Page 7 of 46 <br />