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PAATI Page 7 Permit Na COG-500000 C. EFFLUENT LIMITATIONS AND CONDITIONS - STORMWATER DISCHARGE (continued) 2. Stortnwater Management Plan fSWMPI 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 identi fy 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 plan shall describe and ensure the implementation ofbest management pmctices (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 ofthe permit need not be amended to conform to the SWMP format in this permit. The permittee must implement the provisions of SW MP required under this part as a condition of this permit. The SWMP shall include the following items, at a minimum: Site Map The plan shall provide a site map or maps, which indicate at a minimum: - Mining site boundaries - Access and haul roads - Stortnwater outfalls and an outline of the drainage area of each stormwater outfall - An estimate of the direction of Flow - Materials handling areas - Each existing struttural control measure to reduce pollutants in stormwater 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 the map was prepared b. Description of Potential Pollutant SoureesiMaterial Inventory The plan shall provide a description of all potential sources (activities and materials) which may reasonably be expected to add pollutants to stormwater 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 taken and documented. stormwater Quality Controls Each mining site covered by this permit shall develop a description of stormwater quality controls appropriate far 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 the following minimum components, including a schedule for implementing such controls: I) SWMP Administrator-TheSWMPshallidentifyaspeciflcindividualor individuals within the mining organization who is responsible for developing the SWMP and assisting the mine operator in its implementation, maintenance, and revision. 2) Materials Handling and Soil! Prevention -Where materials can impact s[ortnwater runoff, 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 berths or secondary containment devices to prevent leaks and spills from entering stormwater runoff. 3j Erosion and Sediment Controls - Describe BMPs that will be used to reduce erosion and prevent sedimem deliveryto State waters. These should include structural (such as silt fences, sediment ponds, drop structures, check dams) and non-stmcmral (such as mulching and revegetation) methods.