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NEWMONT <br /> GOLDCORR <br /> 4 HIGH GRADE MILL FACILITIES <br /> No major changes to the HG Mill are anticipated under this Amendment 13. <br /> 4.1 Mill Reagents <br /> No changes to the reagents used in the HG Mill are anticipated as part of Amendment 13. The <br /> reagents used in the HG Mill facilities are discussed below and further discussed in the <br /> Environmental Protection Plan located in Exhibit U. <br /> Lime—Lime is used as a pH modifier prior to slurry entering the flotation circuit and the cyanidation <br /> leach circuit. Lime is delivered by truck in pellet form and stored as pellets in the lime silo. Lime <br /> is dissolved in lime slakers prior to use in the milling. <br /> Potassium amyl xanthate—Potassium amyl xanthate is used as a flotation collector in the flotation <br /> tanks to collect and float the gold materials.The xanthate is shipped as a solid in 55-gallon barrels. <br /> Approximately four shipments of 20 tons per truck is shipped each year. The barrels are stored in <br /> a building adjacent to the HG Mill. The xanthate is added and dissolved in the flotation conditioning <br /> tank prior to entering the flotation tanks. The reagent breaks down during the process into non- <br /> toxic forms. <br /> Dithiophosphate— Dithiophosphate is a reagent that is added to the flotation conditioning tank as <br /> a flotation modifier and combines with the xanthate to float the gold-bearing minerals. <br /> Dithiophosphate is shipped as a liquid in totes. Approximately four shipments occur per year with <br /> 20 totes per shipment. The totes are stored in a building adjacent to the HG Mill building. <br /> Dithiophosphate is consumed during the process. <br /> Frother — Frother is a long chain alcohol which is used to form stable air bubbles for floating of <br /> the gold-bearing minerals in the flotation circuit. Frother is shipped as a liquid in totes. <br /> Approximately four shipments occur per year with 20 totes per shipment. The totes are stored in <br /> a neighboring building. Frother breaks down during the flotation process into non-toxic forms. <br /> Sodium Cyanide—While not currently utilized in the mill process, a dilute sodium cyanide solution <br /> may be introduced into the mill process at the cyanidation leach tanks. Sodium cyanide is <br /> delivered to the site by truck in U.S. Department of Transportation (USDOT) approved containers <br /> as either liquid sodium cyanide solution or as solid sodium cyanide briquettes. Shipping <br /> containers are unloaded on a concrete apron west of the tanks. The concrete apron is curbed and <br /> graded to drain to a sump, in the event of a spill or leak during unloading. <br /> The cyanidation tanks are located on the west side of the mill building within a concrete foundation <br /> with curbing. Tanks are fitted with bird mitigation measures such as netting. Bird balls have been <br /> Cripple Creek&Victor Gold Mining Company Exhibit D <br /> Cresson Project Amendment 13 <br /> 19 <br />