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Technical Revision (TR-28) Climax Molybdenum Company <br /> Environmental Protection Plan Permit No. M-1977-493 <br /> storage system. The other is in the liquid Nokes storage tank area. Both monitors are located at low <br /> points to quickly detect any HzS that might be generated. <br /> Nokes is stored in one tank with a capacity of 18,000 gallons. The Nokes is stored in the reagent storage <br /> area of the mill building (see Mill Building Detail -Area 450 on the south side of the mill building on Figure <br /> AM-06-T-05). <br /> Secondary containment with a volume greater than that of the tank is provided in the reagent storage <br /> area (see Reagent Storage Area Detail Figure AM-06-T-06). Tank level indication is available locally as <br /> well as through the control system. The control system will alarm for a given tank low and high level. <br /> Both a horn and beacon are provided at the unloading point to indicate a tank high level. <br /> In the event of a storage tank failure, Nokes will be contained in the reagent storage area via secondary <br /> containment. The secondary containment area is equipped with a sump but no sump pump. In the event <br /> of a release in this area, a pump will be placed in the secondary containment sump and the Nokes will be <br /> routed back into the process circuit or pumped into a suitable container for proper disposal through <br /> direction from the environmental department. A spill that occurs during offloading into the storage tank <br /> will be handled similarly using a sump located in the offloading area. <br /> When needed, Nokes may be stored as totes in Area 430 (floatation). Area 430 has a concrete floor that <br /> is sloped to a sump so that material can be placed back in the mill circuit or sent to tailing. In the event of <br /> a Nokes distribution system failure, the Nokes will be contained within the mill building. <br /> T-3.2.7 Surfactant <br /> Climax may use FloatSilTM Sodium Silicate as clay mineral dispersant. This is to depress insoluble <br /> contaminants in Feed. It is an alkaline substance which GHS 2 classified skin and eye irritant. This <br /> material will be stored in Area 430 in approximate 300-gallon totes with the same containment as the <br /> other reagents in this area <br /> T-3.2.8 Froth Modifier <br /> Hydrocal 60 (or similar) is used in the flotation circuit as a froth modifier. Like the collector, Hydrocal 60 is <br /> a petroleum distillate and is combustible. It is a skin and eye irritant. <br /> Hydrocal 60 is stored in totes in the rougher flotation area of the mill (Area 430). In the event of a release <br /> in this area, the froth modifier will be routed back into the process circuit or pumped into a suitable <br /> container for proper disposal through direction from the Environmental Department. In the event of a froth <br /> modifier distribution system failure, the froth modifier will be contained within the mill building. <br /> PPG 4000 is added to the cleaner circuit as an anti-foam reagent. This reagent has the capability of froth <br /> modification by enhancing froth drainage and, as such is used an alternate to Hydrocal 60. The product is <br /> mostly (90-100%) comprised of Poly-Propylene Glycol (PPG). The base structure is similar to the cleaner <br /> frother which is comprised of Poly-Propylene Glycol as well. The only structural difference is the higher <br /> molecular weight (Mn - 4000 compared to Mn - 100-500 in the case of the frother). As per the MSDS, <br /> this is not a hazardous substance or mixture. This product is water insoluble. <br /> This product is being added to the circuit either by using 5 gallons buckets and pumping to the launder or <br /> pumping directly from the tote to the launder at a specified dosage. PPG 4000 may be stored as totes <br /> within Area 430. Containment during spill or system failure will be same as mentioned previously for the <br /> cleaner frother. <br /> Like PPG 4000, Polyglycol P 2000 is a polypropylene glycol. The only difference between the two is that <br /> P 2000 has a lighter molecular weight. Both are water insoluble and have similar hazard characteristics. <br /> P 2000 may be used in place of the other froth modifiers. <br /> Nalco 7561 is a similar product to the others described above, and may be used as a replacement of PPG <br /> 4000. The MSDS mentions that the VOC content is 0%, contains no hazardous air pollutant (HAP), and <br /> no toxic release inventory (TRI) chemical. Prolonged contact on eye and skin may cause irritation. Fire <br /> EPP: Version R4 T-12 August 2018 <br />