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APPENDIX C (cont.) <br />- stormwater outfalls and an outline of the drainage area of each stomtwater outfall; <br />- each existing structural control measure to reduce pollutants in stormwater runoff; and <br />- the location of impervious structures (e.g. parking lots, roofs, etc.) <br />4. Stormwater Management Controls <br />Each mining operation certified under by this permit shall develop a description of Stormwater <br />quality controls appropriate for that site, and implement such controls. The appropriateness and <br />priorities of controls in the plan shall reflect identified potential sources of pollutants at the mining <br />site. The description of Stormwater quality controls shall address the following minimum <br />components, including a schedule for implementing such controls: <br />a. SWMP Administrator -The SWMP shall identify a specific individual or individuals within the <br />mining organization who is responsible for developing the SWMP and assisting the mine operator <br />in its implementation, maintenance, and revision. The activities and responsibilities of the <br />administrator should address all aspects of the facility's SWMP. <br />b. Identification of Potential Pollutant Sources and Best Management Practices -The SWMP <br />shall identify potential sources of pollutants at the site and assess the potential of these sources to <br />contribute pollutants to Stormwater dischazges associated with mining activities. The SWMP must <br />also describe appropriate Best Management practices (BMPs) to reduce the potential of these <br />sources to contribute pollutants to Stormwater discharges. At a minimum, each of the following <br />shall be evaluated for the reasonable potential for contributing pollutants to runoff: <br />- loading and unloading operations; <br />- outdoor storage of chemicals or equipment; <br />- outdoor milling or processing activities; <br />- historic mine drainage; <br />- tailings ponds; <br />- crushing facilities or significant dust and particulate generating activities; <br />- on-site waste disposal practices; and <br />- stockpiles of overburden, raw material, intermediate products, byproducts, finished <br />products or waste products; <br />Factors to consider include the toxicity of the material; quantity of chemicals used; amount of <br />material processed; the likelihood of contact with Stormwater; and history of significant drainage, <br />leaks or spills of toxic or hazazdous pollutants. <br />The description of the BMPs shall include: <br />1) Stormwater diversion: Describe how and where Stormwater will be diverted away from <br />material handling and storage azeas to prevent Stormwater contamination. <br />2) Materials handling and spill prevention: Where materials can impact Stormwater runoff, <br />practices that reduce the potential for contamination shall be described and implemented. For <br />example, materials should be stored and handled in covered areas to prevent contact with <br />Stormwater; chemicals should be stored within berms or secondary containment devices to <br />prevent leaks and spills from entering Stormwater runoff. <br />3) Sediment and erosion prevention: Describe practices that will be used to reduce erosion and <br />prevent sediment delivery to State waters. These should include structural (such as silt fences, <br />sediment ponds, drop structures, check dams) and non-structural (such as mulching and <br />revegetation) methods. <br />7/96/Ilvn C-2 <br />