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PART I <br />Page 19 <br />Permit No. CO-0000221 <br />• D. SPECIAL REQUIItEMENTS <br />2. Stormwater Reauiremenu (continued) <br />4) Stormwater Manareemeot Controls <br />Seneca Coal Company shall develop a description of stormwater quality controls appropriate for the Seneca <br />Mine Complex, and implement such convols. The appropriateness and priorities of convols in the plan shall <br />reflect identified potential sources of pollutanu at the mining site. The description of stormwater quality <br />convols shall address the following minimum components, including a schedule for implementing such wntrols: <br />i) SWMP Administrator -The SWMP shall identify a specific individual or individuals within the mining <br />organisation who is responsible for developing the SWMP and assisting the mine operator in iu <br />implementation, maintenance, and revision. <br />ii) Identification of Potential Pollutant Sources and Best Management Practices -The SWMP shall identify <br />potential sources of pollutants at the site, and assess the potential of these sources to contribute pollutanu to <br />stormwater dischazges associated with mining activities. The SWMP must also describe appropriate Best <br />Management Practices (BMPs) to reduce the potential of these sources to contribute pollutants to <br />stormwater discharges. At a minimum, each of the following shall be evaluated for the reasonable potential <br />for contributing pollutanu 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, byproducu, finished products or <br />waste products. <br />Factors to consider include the [oxiciq• of the material; quantity of chemicals used; amount of material <br />processed; the likelihood of contact with stotmwater; and history of significant drainage, leaks or spills of <br />toxic or hazardous pollutants. <br />The description of the BMPs shall include: <br />(a) Stormwater diversion: Describe how and where stormwater will be diverted away from material <br />handling and storaee areas to prevent stotmwater contamination. <br />(b) A9aterials handling and spill prevention: Where materials can impact stormwater runoff, practices <br />that reduce the potential for contamination shall be described and implemented. For example, materials <br />should be stored and handled in covered azeas to prevent contact with stotmwater; chemicals should be <br />stored within berths or secondary containment devices to prevent leaks and spirts from entering <br />stormwater runoff. <br />(c) Sediment and erosion prevention: Describe practices that will be used to reduce erosion and prevent <br />sediment delivery to Slate waters. These could include strucmral (such as silt fences, sediment ponds, <br />drop stmcmres, check dams) and non-structural (such as mulching and revegetation) methods. <br />In each rase where stormwater pollution potential exists, appropriate preventive measures must be <br />identified and implemented. <br />INDBP 4/9/93 <br />