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Permit Amendment (AM-06) - Climax Mine <br />CM0000483 <br />Table T-3: Potential Contaminant Sources and Environmental Protection Facilities at the Climax <br />Mine <br />• <br />Potential Area of Potential Contaminant Direct (Governing) Internal Controls <br />Impacts Sources EPF/Control (Non-EPFs) <br /> Impacted water from the flooded 5-Shaft Pump Station <br /> underground workings <br />Upper Arkansas Run-off and seepage from the Storke Wastewater Pump <br /> Storke Yard Station <br />River Watershed Run-off from road cuts and Storke Wastewater Pump <br /> overburden on Ceresco Ridge Station, Ceresco Seepage <br /> above the Storke Yard Collection System <br /> 4 Dam Seepage 4 Dam Pump Station <br /> Robinson Lake and Dam - Robinson Lake Seepwater <br /> process water, seepage, Pump System, <br />Upper Eagle River sediments Robinson Dam <br />Watershed Robinson TSF and 1 Dam- Robinson Lake Pump <br /> tailing, seepwater, toe drain Station, Robinson Lake <br /> discharge, Tenmile Tunnel Warren's Pump Station, Barge <br /> drainage 1 Dam Robinson TSF <br /> Designated chemicals for EPFs for designated <br /> concentrate production and chemicals and water <br /> water treatment chemicals treatment chemicals, <br /> Process Water <br /> Tank, Tenmile <br />Upper Tenmile Impacted water including: 5 Dam Seepwater Pump Tunnel, 2 Dam <br />Creek Watershed process water <br />run-off <br />seepage System, spillway, Tenmile <br /> , <br />, <br />, <br />underground mine water <br />and ETDL, Decant, Sludge <br /> , <br />water from TSFs Tenmile TSF, Densification <br /> Mayflower TSF Plant (SDP), 3 <br /> Dam Pump <br /> Station <br /> TDL, <br /> Tailing stored in TSFs 2 Dam, <br /> 3 Dam, <br /> 5 Dam <br />T-5.1 Arkansas River Watershed <br />T-5.1.1 Potential Sources of Contamination <br />The upper Arkansas River watershed contains those portions of the Climax site that supported the <br />historic underground mining operations. Prior to closure of the underground mine, the entrance to the <br />underground operation at Climax was through 5-Shaft and the Storke Portal at the Storke Yard just east <br />of the hairpin turn on Highway 91, in the upper Arkansas River watershed. <br />When the underground operation was terminated in December 1994, equipment was salvaged and the <br />workings were allowed to flood naturally. Water in contact with sulfide mineralization underground meets <br />the definition of "Acid Mine Drainage" in Rule 1.1 (2), and thus, is a potential source of contamination to <br />the upper Arkansas River watershed should water levels rise uncontrolled. <br />Exhibit T T-11 May 2010