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Eagle Park Reservoir Chemical Loading and Mixing Analysis <br />Conclusions <br />This mixing evaluation is intended to represent a reasonable yet conservative analysis of the <br />hypothetical impact to water quality in Eagle Park Reservoir associated with groundwater inflow. <br />It is also important to note that no observable increasing water quality trends have been <br />observed in actual monitoring data from the reservoir over the last several years. These modeled <br />data indicate that the proposed NPL values are protective of water quality within the reservoir. <br />References <br />ARCADIS U.S., Inc., 2012. Hydrogeologic Conceptual Model and Proposed Groundwater <br />Monitoring and Compliance Locations at Climax Mine. Letter report to R. Lazuk. April 27. <br />Climax Molybdenum Company, 1984. Groundwater Study Design Report, Climax, Colorado. <br />Geology Department, Climax Mine. June 20. <br />Climax Molybdenum Company, 1985. Reply to Comments on Tenmile Groundwater Study. <br />Climax Molybdenum Company, Amax Molybdenum Division, AMAX Inc. December 3. <br />Helton and Williamson, 1997. Eagle Park Reservoir Project Feasibility Study. Prepared for Eagle <br />River Water & Sanitation District, Upper Eagle Regional Water Authority, and Vail <br />Associates, Inc. <br />Kumar & Associates, 1994. Project #94-350.1, Robinson Lake Cutoff. Logs of Borings K-1, K-2, K- <br />3, K-4. <br />LRE, 2014. 2013 Evaluation of Eagle Park Reservoir Water Quality & Point of Compliance Well <br />Sampling. Prepared by Leonard Rice Engineers, Inc., May 2014. <br />LRE, 2015. 2014 Evaluation of Eagle Park Reservoir Water Quality Report. Prepared by Leonard <br />Rice Engineers, Inc., February 2015. <br />Parkhurst, D.L., and Appelo, C.A.J., 1999. User's Guide to PHREEQC (Version 2) —A Computer <br />Program for Speciation, Batch -Reaction, One -Dimensional Transport, and Inverse <br />Geochemical Calculations, USGS WRIR 99-4259. <br />Tetra Tech, 2014. 2014 Robinson Seep Investigation; Status Report. Prepared by Tetra Tech for <br />Climax Molybdenum. November 2014. <br />Titan Environmental Corporation, 1995. Evaluation Lime Station Slaking Well. Letter to B. <br />Romig. February 15. <br />Wells, Wm. Curtis, 1996. Continued Ground Water Consultation, Climax Mine Office <br />Exploratory Well, Lake County, Colorado, Job No. 3795. Letter to R. Ganster. January 26. <br />Climax Molybdenum Company Page - 7 - <br />