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COLORADO <br /> Division of Reclamation, <br /> AV Mining and Safety <br /> Department of Natural Resources <br /> 1313 Sherman Street,Room 215 <br /> Denver,Colorado 80203 <br /> November 4, 20164 <br /> Climax Mine <br /> Attn: Mr. Ray Lazuk <br /> Highway 91 <br /> Climax, CO 80429 <br /> RE: File M1977-493; Climax Mine; Request for Demonstration of Compliance with WQCC <br /> Rule 41 —Basic Standards for Groundwater <br /> Mr. Lazuk: <br /> The Division of Reclamation, Mining and Safety(DRMS or Division) has recently reviewed the <br /> Groundwater Monitoring Plans and data associated with mining sites, such as the Climax site, that are <br /> subject to SB-181 reporting to Colorado Department of Health and Environment (CDPHE) Water <br /> Quality Control Division. All operators must comply with the requirements of Colorado Department of <br /> Public Health and Environment (CDPHE) Water Quality Control Commission (WQCC) Rule 41 —Basic <br /> Standards for Groundwater. <br /> Rule 41 states that WQCC has the exclusive jurisdiction to set groundwater standards and <br /> classifications. DRMS is named as an implementing agency, responsible for implementing WQCC's <br /> standards and classifications for discharges (other than point source discharges to surface water) through <br /> its own regulatory programs after consultation with the WQCC and the WQCD. In areas where <br /> groundwater has not yet been classified and no site specific standards have been adopted by WQCC, the <br /> Interim Narrative Standard, as summarized from Rule 41 below, applies. <br /> WQCC's Interim Narrative Standard <br /> a. The"Interim Narrative Standard" in 41.5(C)(6)(b)(i) below is applicable to all <br /> groundwater, to which standards have not already been assigned in the state, with the <br /> exception of those areas where the total dissolved solids (TDS) are equal to or exceed <br /> 10,000 mg/l. This standard is applicable independent of and in addition to the <br /> statewide standards for radioactive materials and organic pollutants established in this <br /> section 41.5.C. <br /> b. i. Until such time as use classifications and numerical standards are adopted for the <br /> groundwater on a site-specific basis throughout the state, and subject to the <br /> OF COO <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. Hickentooper, Governor I Mike King, Executive Director I Virginia Brannon, Director I <br /> \1876� <br />