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Star Mine Operations, LLC Revenue Mine MCP Plan 2012 <br />Aerofloat -242 is considered to be stable. It liberates hydrogen sulfide on contact with acids or acidic <br />material. Contact with oxidizing agents, free radical initiators, bases, amines, and chlorosulfonic acid <br />should also be avoided. Strong mineral acids and/or strong oxidizers may cause exothermic reaction. If <br />the Aerofloat -242 decomposes, it can produce ammonia, carbon monoxide, carbon dioxide, oxides of <br />sulfur, hydrogen sulfide, phosphoric acid, oxides of phosphorus, and oxides of nitrogen. <br />3.2.8 Corn Starch — Powder <br />Corn Starch should be stored in a cool, dry place. <br />Corn Starch is considered to be stable under normal temperature and pressures. It is incompatible with <br />strong oxidizing agents and may produce carbon monoxide and carbon dioxide on contact. <br />3.2.9 Sodium Hydroxide — 50% solution with water <br />Sodium Hydroxide should be stored in a cool, dry place. <br />Sodium Hydroxide is considered to be stable. It should not be allowed to contact aluminum, tin, lead, <br />zinc or any alloys. Acids should also be avoided. When mixed with water, it produced heat. The <br />solution with water will react with the above metals and may generate hydrogen gas. <br />3.2.10 Sodium Hydrogen Sulfide — Granular <br />Sodium Hydrogen Sulfide should be stored in a cool, dry place. It should be kept away from sources of <br />ignition, acids and moisture. The containers should be rightly closed and should not be constructed of <br />metal. <br />Sodium Hydrogen Sulfide is hygroscopic: it absorbs moisture or water from the air. It should not be <br />allowed to contact incompatible materials (such as metals, strong oxidizing agents or acids) or ignition <br />sources. Dust generation, temperatures above 122 °F, and exposure to moist air or water should also be <br />avoided. When it decomposes, it may produce oxides of sulfur or hydrogen sulfide. <br />3.2.11 Anionic Emulsion Flocculent AE 852 - Fine powder <br />AE 852 should be stored a cool, dry place. The working solution should be stored in a heated area <br />between 40 degrees and 95 degrees F though freezing requires agitation before use and may damage or <br />change the physical condition of the material. The containers should be constructed of stainless steel, <br />plastic or epoxy lined steel. <br />AE 852 is considered to be stable. Oxidizing agents may cause exothermic reactions and should be <br />avoided. Thermal decomposition may produce carbon and/or nitrogen oxides. <br />11 <br />