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PART I Page 7 Permit No. COG-500000 C. EFFLUENT LIMITATIONS AND CONDITIONS - STORMW ATER DISCHARGE (continued) 2. Stormwater Management Plan (SWMP) A Stormwater Management Plan (SWMP) shall be developed for each facility covered by this section (Part I.C). The SWMP shall be prepared 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 activity. In addition, the pian shall descn"be and ensure the implementation of best management practices (BMPs), which will be used to reduce the pollutants in stormwater discharges, associated with mining activity. SWMPs that were prepared in accordance with requirements in the previous version of the pennit need not be amended to conform to the SWMP fomUlt in this pennit. The permittee must implement the provisions ofSWMP required under this part as a condition of this permit. The SWMP shall include the following items, at a minimum: a. Site Map The plan shall provide .a site map or maps, which indicate at a minimum: Mining site boundaries Access and haul roads Stormwater outfalls and an outline of the drainage area of each stormwater outfall An estimate of the direction of flow Materials handling areas Each existing structural control measure to reduce pollutants in stonnwater runoff Areas used for storage or disposal of overburden, materials, soils or wastes Areas used for mineral milling and processing Springs, streams, wetlands and other surface waters Location of mine drainage or any other process water Boundary of tributary area that is subject to effluent limitations Date lhe map was prepared b. Description of Potential Pollutant SourceslMaterial Inventory The plan shall provide a description of all potential sources (activities and materials) which may reasonably be expected to add pollutants to stonnwater discharges. Such sources may include haul roads, equipment storage and maintenance areas, fuel storage areas, etc. In each case where stormwater pollution potential exists, appropriate preventive measures must be taIcen and documented. c. Stonnwater Quality Controls Each mining site covered by this permit shall develop a description of stonnwater 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 stonnwater quality controls shall address the following minimwn components, including a schedule for implementing such controls: 1) SWMP Administrator - The SWMP shall identify a specific individual or individuals within the mining organization who is responsible for developing the SWMP and assisting the mine operator in its implementation, maintenance, and revision. 2) Materiacls Handling and Spill Prevention - Where materials can impact stormwater runoff, BMPs that reduce the potentilll 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 seconcblry contaimnent devices to prevent leaks and spills from entering stonnwater runoff. 3) Erosion and Sediment Controls - Describe BMPs that will be used to reduce erosion and prevent sediment delivery to State waters. These should include structural (such as silt fences, sediment ponds, drop structures, check darns) and non-stru.ctural (such as mulching and revegetation) methods.