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Permit Amendment (AM-06) - Climax Mine <br />CM0000494 <br />containment. In actuality, with the exception of the sulfuric acid tank at the Mayflower Pump Station, <br />designated chemicals also have tertiary containment in that an accidental release which escapes <br />secondary containment ultimately will report to and be contained by the TSFs. <br />The ETDL generally has a good record for effectiveness. However, leaks have occurred in the past. <br />When these leaks have occurred, repairs to the line have been made promptly and as stated above, other <br />EPFs downgradient of the ETDL serve to contain water that may escape containment. <br />The effectiveness of the Robinson, Tenmile, and Mayflower TSFs is self-evident. The Robinson TSF has <br />been used since the mid-1930s, the Tenmile TSF since the mid-1950s, and the Mayflower TSF since the <br />mid-1970s without failure. Each TSF contains major point and non-point source releases of potential <br />contaminants from upstream areas including impacted seepages from the McNulty and North 40 OSFs, <br />and potentially contaminated surficial run-off from haul roads, the pit area, and the yard areas around the <br />mill facilities. The effectiveness of the Mayflower TSF (including the 5 Dam Seepwater Collection and <br />Return System) in the Climax water treatment and discharge system has been discussed at length. <br />EPF effectiveness for storage of designated chemicals within the mill will be established based upon final <br />design. <br />T-5.5 Specific Environmental Protection Facility Monitoring/Alarms <br />The critical EPFs at Climax are regularly checked, inspected, or monitored either visually, analytically, or <br />both by security and water treatment personnel that are on-site at all times. Occasional inclement <br />weather can restrict access to some facilities for short periods of time. Checks and inspections are <br />defined and discussed in the SPCC/MCP. In the case of pump stations, mechanical and telemetric <br />alarms also are operational should failures occur. These monitoring systems are discussed herein by <br />EPF and watershed. System alarms for the critical EPFs are discussed in subsequent sections. Facility <br />monitoring/alarms details are not included for potential future EPFs that have not been designed. <br />T-5.5.1 Arkansas River Watershed <br />5-Shaft Pump Station: The 5-Shaft Pump Station is equipped with monitoring and alarm systems. In <br />addition to these systems, the station is visually checked regularly. A groundwater piezometer (5-Shaft <br />Monitoring Well) has been installed adjacent to the pump station to monitor groundwater levels <br />downgradient of 5-Shaft. <br />Storke Wastewater Pump Station: The Storke Wastewater Pump Station is equipped with monitoring and <br />alarm systems. As with the 5-Shaft Pump Station, the Storke Wastewater Pump Station is checked <br />visually by designated employees. <br />T-5.5.2 Eagle River Watershed <br />Robinson TSF and 1 Dam: As discussed previously, 1 Dam has been reconfigured, stabilized, and <br />reseeded. Monitoring of this EPF is conducted visually by various mine personnel. Piezometers <br />equipped with data loggers are utilized to monitor water levels in the dam. <br />Robinson Lake Robinson Dam Warren's Pump Station and Robinson Lake Pump Station: Visual <br />monitoring of Robinson Lake and Dam occurs routinely. Currently, Warren's Pump Station operates as <br />level control for Robinson Lake. Warren's Pump Station is checked regularly by mine personnel and <br />contains appropriate alarms to provide immediate notification should pump failure occur. When the <br />Robinson Lake Pump Station is constructed and brought online, it will operate as the main level control <br />for Robinson Lake. The final design details for the Robinson Lake Pump Station are not yet finalized. As <br />details of the facility monitoring and alarm systems are developed, they will be incorporated into the EPP. <br />As with the other pump stations at Climax, it is anticipated that a system alarm would be connected <br />telemetrically to the mill control room to provide immediate notification should pump failure occur. A <br />stand-by generator is planned for this EPF in case of a total power failure. The Robinson Lake Seepage <br />Pump System below Robinson Dam is monitored on a regular basis. <br />4 Dam Seepage Collection and Pump Station: This seepage return station is checked regularly by mine • <br />Exhibit T T-22 May 2010