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TR -18 to Permit M- 1977 -342 <br />Environmental Protection Plan <br />Monitoring: Chemical storage containers are routinely inspected in accordance with the <br />SPCC /MCP (Appendix A) by Mill personnel to assess effectiveness and integrity of each EPF <br />system. Maintenance and /or updates to facilities, systems, equipment, or procedures are <br />performed as needed to be protective of the environment and to prevent releases. <br />7.3. Storm Water Diversion System <br />Mill EPF 3.1 — Storm Water Diversion System: Storm water diversion systems have been <br />constructed on the: <br />• West and north ends of the tailings storage facility to divert un- impacted storm water <br />around the north end of the property to the Williams Fork River; and <br />• Southwest portion of the Mill property to divert drainages through an underground <br />diversion pipe to the Williams Fork River. <br />See section 10.2 and the Henderson Storm Water Management Plan for additional information <br />on storm water diversion systems. <br />Effectiveness: The storm water diversion canals have been effective in preventing the amount <br />of storm water that can come into contact with disturbed land, designated chemicals and toxic <br />or acid forming materials. As a result, the potential pollution of storm water is greatly reduced. <br />Monitoring: The storm water diversion system is inspected twice per year in accordance with <br />Henderson's Storm Water Management Plan (see Section 10.2 for additional information). <br />Climax Molybdenum Company <br />Henderson Operations <br />October, 2012 <br />Page 24 of 40 <br />