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May Day Idaho Mine Complex 112 (d) Permit Application <br /> Office/Wildcat Corporate HQ <br />USCOE Nationwide 14 Permit CDPHE/Wildcat Co orate HQ <br />(c) Wildcat Mining Corporation will provide the Division with information pertaining to <br />any additional permits and licenses within 30 days of receipt. <br />(d) The mine will be operated in compliance with all State and Federal Regulations. <br />6.4.20(5) Designated Chemicals Evaluation <br />(a) Potential to Affect Human Health, Property or Environment <br />Several chemicals have been identified for use during the milling process (section <br />6.4.4.a). None of these substances contain chemicals subject to 40 CFR § 302 reporting. <br />A summary of their potential to affect human health, property or the environment is <br />presented below: <br />Chemical Handling Issues Potential Human Effects Potential Environmental <br /> Effects <br />Sodium Carbonate, Store in cool dry area. No acute toxicological No significant toxicity to <br />Anhydrous Avoid acids. effects expected. aquatic organisms. <br /> Skin irritant. <br /> Severe eye irritant. <br />Sodium Silicate Store in closed containers. No acute toxicological data. High pH of material harmful <br />Solution Avoid acids, reactive metals, Moderate skin irritant. to aquatic life. <br /> ammonium salts. (to be Severe eye irritant. Diluted material rapidly <br /> stored in Zircon Containers) depolymerizes to yield <br /> dissolved silica. <br />Surfactant Product may become solid Significant skin irritant. Material inherently <br /> <0°C. Severe eye irritant. biodegradable. <br /> Avoid strong acids. (to be Moderately toxic to aquatic <br /> stored in Zircon Containers) organisms. <br />Potassium amyl Spontaneously combustible. Acute oral and dermal Potential toxic to aquatic <br />xanthate Store in closed containers. effects. life. <br /> Avoid high temperatures, No acute inhalation effects <br /> strong acids, oxidizing expected. <br /> agents. (to be stored in a Mild to severe skin and eye <br /> Zircon Containers that will irritant. <br /> be separated from other <br /> chemical storage areas) <br />Sodium alkyl Store in closed containers. Acute oral and dermal No aquatic toxicity data. <br />dithiophosphate Avoid strong acids, effects. Not readily biodegradable. <br /> oxidizing agents. (to be No acute inhalation effects <br /> stored in Zircon Containers) expected. <br /> Mild to severe skin and eye <br /> irritant. <br />Copper sulfate Store in closed containers. Acute oral, dermal and Potential toxic to aquatic <br /> Avoid excessive heat and inhalation effects. life. <br /> moisture. (to be stored in No acute inhalation effects Will not biodegrade. <br /> Zircon Containers) expected. <br /> Mild skin irritant. <br /> Moderate to severe eye <br />REVISED June 5, 2011 <br />May Day Idaho Mine Complex 112(d) Permit Application <br />September 21, 2010 <br />3 <br />i