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COLORADO <br />Division of Reclamation, <br />Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />January 14, 2016 <br />Al Weaver <br />Energy Fuels Coal, Inc. <br />P.O. Box 459 <br />Florence, CO 81226 <br />Re: Southfield Mine (Permit No. C-1981-014), water quality results for spring in Magpie Diversion <br />Dear Mr. Weaver: <br />On December 4, 2015, DBMS staff obtained the following field measurements (using an Extech EC500 <br />meter) of the developed spring within the Magpie Creek Diversion: temperature 15.5 deg C, pH 6.3, <br />conductivity 5,600 ps/cm, TDS 4,000 mg/L. Sample bottles were filled, and after the inspection these <br />were taken to the Colorado Department of Public Health and Environment (CDPHE) water quality <br />laboratory in Denver, Colorado. The enclosure to this letter presents the lab results. <br />Of considerable note are the concentrations of Total Dissolved Solids (TDS) and sulfate, although high <br />values of these constituents are expected from spoil springs. A TDS value of 4,700 mg/l was detected, <br />which nearly puts the water in the classification of saline. The sulfate concentration of 2,900 mg/1 is an <br />order of magnitude higher than the CDPHE domestic water standard of 250 mg/l for surface water <br />(CDPHE Regulation 31, "The Basic Standards and Methodologies for Surface Water"). The Division did <br />not identify any exceedances of the agricultural standards in Regulation 31. <br />As discussed previously, the Division would like to receive Dr. Corley's opinion of these water quality <br />results, and if he thinks that the spring is an asset or detriment in its current condition. After we receive <br />his opinion, we will discuss the matter with EFCI as part of the SL -03 adequacy process. <br />If you have questions or need additional information, please contact me. <br />Sincerely, <br />Robert D. Zuber, P.E. <br />Environmental Protection Specialist II <br />Enclosure <br />Cc: Dr. W.D. Corley, 2605 Constellation Drive, Colorado Springs, CO 80906 <br />1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us <br />John W. Hickenlooper, Governor I Mike King, Executive Director I Virginia Brannon, Director <br />