2011-10-24_PERMIT FILE - C1983059

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PART 1 Page No. b Permil No. COG-650000 B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 2. Stotmwater Management Plan f SWMP) A Stormwater Management Plan (SWMP) shall be developed for the portion of each facility covered by this section of the permit. The SWMP shall be prepazed in accordance with good engineering practices. (A registered engineer need not complete the plan.) The plan shall identify potential sources of pollution (including sediment), which may reasonably be expected to affect the quality of stormwater discharges associated with the mining operation. In addition, the plan shall describe and ensure the implementation of best management practices (BMPs), which will be used to reduce the pollutants in stormwater discharges, associated with mining activity. Mining operations must implement the provisions of the SWMP required under this part as a condition of this permit. The Division reserves the right to request and review the plans, and to require additional measures to prevent and control pollution, as needed. The SWMP shall describe all areas that have not been previously permitted, and which meet the de£mition of a stormwater discharge in 40 CFR 122.26. Examples of such azeas aze roads and railroad lines used for transportation to and from the site, outslopes of ponds, inactive loadouts, sites used for storage and maintenance of material handling equipment, and areas granted small azea exemptions. a) SWMP Contents The SWMP shall include the following items, at a minimum: 1) Site Map The plan shall provide a site map or maps, which indicate, at a minimum: - Mining site boundaries - Access and haul roads - Stormwater ouffalls and an outline of the drainage azea of each stormwater ouffall - An estimate of [he direction of flow - Materials handling azeas - Each existing stmctural control measure to reduce pollutants in stormwater runoff - Areas used for storage or disposal of overburden, materials, soils or wastes, including tailings piles or ponds - Areas used for mineral milling and processing - Springs, streams, wetlands and other surface waters - Location of mine drainage or any other process water discharge points - boundary of azea that contributes runoff to ouffalls that aze subject to effluent limitations guidelines. - Date the map was prepazed 2) Description of Potential Pollutant Sources/Material Inventory The plan shall provide a description of all potential sources (activities and materials), which may reasonably be expecud to add pollutants to stormwater discharges. Such sources may include haul roads, equipment storage and maintenance azeas, fuel storage azeas, etc. In each case where stotmwater pollution potential exists, appropriate preventive measures must be taken and documented. 3) Stormwater Quality Controls Each mining site covered by this permit shall develop a description of stormwater quality controls appropriate for that site, and implement such controls. The appropriateness and priorities of controls in the plan shall reflect identified potential sources of pollutants at the site. The description of stormwater quality controls shall address [he following minimum components, including a schedule for implementing such controls: a. SWMP Administrator - The S WMP shall identify a specific individual or individuals within the Honing organization who is responsible for developing the SWMP and assisting the mine operator in its implementation, maintenance, and revision. b. Materials Handline and Snill Prevention -Where materials can impact stormwater runotl; BMPs that reduce the potential for contamination shall be described. For example, materials should be stored and handled in covered areas whenever possible to prevent contact with stormwater; fuels and other chemicals should be stored within berms or secondary containment devices to prevent leaks and spills from entering stormwater runoff.