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r <br /> Metal Mining SWMP Guidance Document <br /> Page 12 <br /> The SWMP shall include the following items, at a minimum: <br /> 1. Description of Mining Activities <br /> The plan shall provide a narrative description of the mining and associated activities that took place <br /> at the site. The narrative description shall report the approximate dates of operation, the total <br /> acreage within the mine site and an estimate of the number of acres of disturbed area. A general <br /> description of the location of the mining site relative to major transportation routes and communities <br /> shall also be provided. <br /> This is a general description of the site: what type of mining was done, how much area does the impacted area <br /> cover, and what other activities related to mining (milling, crushing, cyanide heap leach, etc.) took place. <br /> 2. Site Man <br /> Each plan shall provide a generalized site map or maps which indicate any of the following which <br /> may be applicable: <br /> - mining/milling site boundaries and access and haul roads; <br /> - areas used for storage of overburden, materials, soils, tailings or wastes; <br /> - areas used for outdoor manufacturing, storage or disposal of materials; <br /> - tailings piles and ponds; <br /> - an estimate of the direction(s) of flow; <br /> - existing structural control measures to reduce pollutants in stormwater runoff; and <br /> - springs, streams, wetlands and other surface waters. <br /> See page 2 of this document for an explanation of this item. <br /> 3. Stormwater Management Controls - Identification of Sources and Best Management Practices <br /> The SWMP shall identify potential sources:of pollutants at the site and assess the potential of these <br /> sources to contribute pollutants to stormwater discharges associated with mining activities. The <br /> SWMP must also describe appropriate Best Management practices (BMPs) to reduce the potential of <br /> these sources to contribute pollutants to stormwater discharges. The appropriateness and priorities <br /> of controls in the plan shall reflect identified potential sources of pollutants at the mining site. The <br /> description of the BMPs shall include: <br /> a. Stormwater Diversion: Describe how and where stormwater will be diverted away from potential <br /> pollutant sources to prevent stormwater contamination. <br /> b. Sediment and Erosion Prevention: Describe practices that will be used to reduce erosion and <br /> prevent sediment delivery to State waters. These could include structural (such as silt fences, <br /> sediment ponds, drop structures, check dams) and non-structural (such as mulching and <br /> revegetation) methods. <br /> See page 3 of this document for an explanation of this item. <br />