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N` WM O• • Newmont Mining Corporation <br /> 6363 South Fiddler's Green Circle,Suite 800 <br /> Greenwood Village,CO 80111 <br /> T 303.863.7414 <br /> F 303.837.5837 <br /> www.newmont.com <br /> January 17, 2017 <br /> Tyler O'Donnell <br /> Cripple Creek and Victor Gold Mining Cc <br /> 100 North 3rd Street <br /> Victor, CO 80860 <br /> Dear Mr. O'Donnell, <br /> Newmont Metallurgical Services (NMS) provided analytical results for plant concentrates from the Cripple <br /> Creek and Victor Operation in Cripple Creek Colorado. Analytical results were to evaluate if whether <br /> potential environmental concerns would be observed from disposal of these products under atmospheric <br /> conditions. Two products were obtained; rougher concentrate and cleaner concentrate, both were <br /> analyzed using the standard solids waste disposal characterization (SWDC) method mimicking the <br /> Environmental Protection Agency's (EPA) SW-846 method 1311, toxicity characteristic leaching <br /> procedure (TCLP). Results for both samples, rougher and cleaner concentrates, show compliance <br /> against EPA allowable heavy metal limits as shown below in Table I. Full analytical characterizations, <br /> Newmont's SWDC method, and EPA SW-846 method 1311 are included. <br /> Table I. Solid Waste Disposal Results <br /> Sample <br /> Analysis Rougher Cleaner Heavy US EPA <br /> Units Concentrate Concentrate Metal Allowable Limits <br /> NM-218964-1 NM-218964-2 <br /> Mercury CV ug/L 2.9 4.1 Mercury 200 ug/L <br /> ICP-26-Digest Ag mg/L <0.05 <0.05 Silver 5.0 mg/L <br /> ICP-26-Digest As mg/L 0.09 <0.05 Arsenic 5.0 mg/L <br /> ICP-26-Digest Ba mg/L 0.42 0.35 Barium 100.0 mg/L <br /> ICP-26-Digest Cd mg/L <0.05 0.06 Cadmium 1.0 mg/L <br /> ICP-26-Digest Cr mg/L <0.05 <0.05 chromium 5.0 mg/L <br /> ICP-26-Digest Pb mg/L <0.05 0.53 Lead 5.0 mg/L <br /> ICP-26-Digest Se mg/L <0.05 <0.05 Selenium 1.0 mg/L <br />