2009-06-08_REVISION - M1997032 (19)

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Part I Page 9 of 22 Permit No. COR-040000 l• C. STORMWATER MANAGEMENT PLAN - INACTIVE MINES (cont.) 2. Site Map Each plan shall provide a generalized site map or maps which indicate any of the following which may be applicable: - mining/milling site boundaries and access and haul roads; - equipment storage, fueling and maintenance areas; - materials handling areas; - areas used for storage of overburden, materials, soils, tailings or wastes; - areas used for outdoor manufacturing, heap leach pads, storage or disposal of materials; - location of mine drainage or any other process water; - tailings piles and ponds; - an estimate of the direction(s) of surface flow; - stormwater outfalls and an approximate outline of the areas draining to each outfall; - existing structural control measures to reduce pollutants in stormwater runoff; - springs, streams, wetlands and other surface waters; and - all areas of soil disturbance. Stormwater Management Controls - Identification of Sources and Best Management Practices Each mining site certified under 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 mining site. The description of stormwater quality controls shall address the following minimum components, including a schedule for implementing such controls. For newly-certified facilities, if existing controls are inadequate to achieve the general objective of controlling pollutants in stormwater discharges associated with industrial activity, any schedule to implement additional controls to meet this objective shall not exceed 60 days from when the facility begins operations, or from when the general permit certification is issued, whichever is later, unless permission for a later deadline is obtained from the Division. New controls that will replace or modify existing controls that are already adequately addressing a pollutant source are not required to meet this schedule (e.g., replacing a control with a less resource- intensive practice). a. 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. The activities and responsibilities of the administrator shall address all aspects of the facility's SWMP. b. Identification of Potential Pollutant Sources and Best Management Practices - The SWMP shall identify potential sources of pollutants at the site, and assess the potential of these sources to contribute pollutants to stormwater discharges associated with mining activities. The SWMP must also describe appropriate Best Management Practices (BMPs) to reduce the potential of these sources to contribute pollutants to stormwater discharges. At a minimum, each of the following shall be evaluated for the reasonable potential for contributing pollutants to runoff: - outdoor storage of chemicals or equipment; - on-site waste disposal practices; - overburden, raw material, intermediate products, byproducts, finished products or waste products; and - disturbed areas Factors to consider include the toxicity of the material; quantity of chemicals used; the likelihood of contact with stormwater; and history of significant drainage, leaks or spills of toxic or hazardous pollutants. The description of the BMPs shall include: 1) Stormwater Diversion: Describe how and where stormwater will be diverted away from potential pollutant sources to prevent stormwater contamination. 2) Sediment and Erosion Prevention: Describe practices that will be used to reduce erosion and prevent sediment ?. delivery to State waters. These could include structural (such as silt fences, sediment ponds, drop structures, check dams) and non-structural (such as mulching and revegetation) methods.