2012-10-05_REVISION - M1977342 (12)

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TR -1a to Permit M- 1977 -342 Environmental Protection Plan Table 1. - Designated Chemicals'Used at the Henderson Mill NAME q APPROX. USE PATE Phosphorous Pentasulfide (P2S5) Lead, Copper Depression 48,000 lbs. Mill 0.024 lb./Ton Complexed in tailings Sodium Hydroxide Hydrochloric Acid Cytec OrePrep F -579 Orform D8 Depressant Pine Oil Collector 0i1 #2 Diesel Fuel Syntex Sodium Lauryl Sulfate Tergitol NP -9 Surfactant Coherex Nokes and Water Treat. Lead Leach Circuit Frother Depressant Frother Collector Collector and Heating Fuel Frother, Soap Frother, Soap Surfactant in Lead Leach Tailings dust control 24,600 gal. 50,000 gal. 2,600 gal. 2,600 gal. 14,400 gal. 32,000 gal. 32,000 gal. 18,900 gal. 8,000 lbs. 9,400 gal. 20,000 gal. Mill Mill Mill Mill Mill Mill Mill Mill Mill Mill Tailings impound. 0.191 lb/Ton (Mill) 0.47 lb /Ton 0.0091b /Ton 0.038 lb/Ton 0.032 lb /Ton 0.619 lb./Ton 0.619 lb./Ton 0.015 lb /Ton 0.004 lb/Ton 0.022 lb/Ton 1500 gal/day when used Neutralized Neutralized Prod. & tail Prod. & tail Prod. & tail Prod. & tail Prod. & tail Prod. & tail Prod. & tail Prod. & tail Tailings ' The designated chemicals, listed quantities, and use concentrations are presented as the best information available at the time of the submittal of this EPP. These chemicals, quantities, and concentrations may vary based upon production needs and processes. For example, brand name chemicals such as (but not limited to) Syntex, Cytec OrePrep F -579 or Orform D8 Depressant may be changed out for different brands of similar chemicals based on factors such as cost and availability. Changes in brands and reagent usage are a part of the production process and are not considered to be grounds for notification to the DRMS. 2 Mainly use Vapor Oil, but Diesel #2 may be used as a backup. Climax Molybdenum Company Henderson Operations