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Technical Revision (TR-28) Climax Molybdenum Company <br /> Environmental Protection Plan Permit No. M-1977-493 <br /> Agency/Organization Applicable Permit or Description <br /> Authorization <br /> US Department of Agriculture Forest Service Special Use Permit Permit for Supply Canal No. 1 <br /> #2720 <br /> T-3 Designated Chemicals <br /> The chemicals listed and discussed herein are those used specifically in: 1) the extractive metallurgical <br /> processing of molybdenite ore to produce MoS2 concentrate; and 2) the wastewater treatment system at <br /> Climax. Climax produces molybdenum concentrates, thus most of the designated chemicals associated <br /> with metallurgical processing are currently present on site. The rates of chemical usage are variable, <br /> depending on properties of the ore and other process considerations. Records of chemical usage are <br /> maintained by Climax. Information relative to water treatment chemicals used at the site is also provided, <br /> however, these are not identified as designated chemicals. <br /> The information provided regarding designated chemicals is presented as the best information available. <br /> These chemicals, quantities, and concentrations may vary based upon production needs and processes. <br /> For example, brand name chemicals may be changed out for different brands of similar chemicals based <br /> on factors such as cost, effectiveness, material handling requirements related to safety, or environmental <br /> reasons. Changes in brand and reagent usage are a part of the production process and are not <br /> considered to be grounds for notification to the DRMS. <br /> Climax also will periodically conduct both bench-scale and pilot-scale reagent testing of new reagents to <br /> improve processing and economic efficiencies, and reducing safety and/or environmental impacts. <br /> Bench-scale testing will adhere to standard industry practices for handling and disposal of reagents. <br /> Climax will provide information electronically or in writing to DRMS for pilot-scale testing, whereby new <br /> chemicals are temporarily introduced into the process. This information will include rationale for testing <br /> the new reagent, MSDS information, expected quantities to be used during the test, and anticipated <br /> duration of the test. <br /> Notification to the DRMS also will be made per the review/reporting discussed in Section T-1.1.2 in the <br /> event that: 1) new types of chemicals, not discussed herein, are added to the process; 2) the storage <br /> location of a designated chemical is changed; or 3) the specific containment facility for a designated <br /> chemical must be modified. <br /> TR-14 described the new mill and ancillary buildings for use during resumed production; however the final <br /> design and layout of the mill and accessory buildings had not been fully developed at that time. TR-14 <br /> designated the mill building as a location for several Environmental Protection Facilities (EPFs) <br /> associated with designated chemicals. Details of the mill facility are provided in general arrangement <br /> drawings (Figures AM-06-T-05 and AM-06-T-06). <br /> T-3.1 List of Chemicals and Specific Locations <br /> Designated chemicals that may be used at Climax during periods of production and for on-going water <br /> treatment are listed in Table T-2. The table includes the list of designated chemicals used in the froth <br /> flotation metallurgical process for concentrating MoS2 and, for informational purposes, also lists water <br /> treatment chemicals. Not all chemicals in Table T-2 may be present on site. For example, Climax has no <br /> immediate plans for using sodium cyanide, and this chemical is not being stored on site. It remains in the <br /> list of designated chemicals in the event it is ever used at Climax. <br /> The individual reagent tank volumes are presented in Table T-2 and their locations are illustrated on <br /> Figure AM-06-T-05. There are two enclosed reagent storage rooms within the mill building. There are <br /> three tanks in one room; the collector, frother and iron depressant tanks. The largest of these tanks is <br /> 13,500 gallons, or approximately 1,800 ft3. The total maximum volume of reagents stored in this room is <br /> 32,800 gallons, or approximately 4,400 ft3. As illustrated on Figure AM-06-T-05, this room has a total spill <br /> containment capacity of approximately 44,000 gallons, or 5,900 ft3. The other room contains one tank, <br /> the liquid Nokes (iron/lead/copper depressant) tank, whose size is 18,000 gallons, or approximately 2,400 <br /> ft3 with a spill containment capacity of approximately 29,000 gallons, or 4,000 ft3. All of the reagent <br /> EPP: Version R4 T-7 August 2018 <br />