2018-08-08_PERMIT FILE - C1982056 (14)

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PART 11 Page No. 14 Permit No. COG -850000 2. Description of Potential Pollutant Sources/Material Inventory 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: - haul roads - loading and unloading operations; - maintenance areas - outdoor storage of fuels, chemicals or equipment; - outdoor ore processing activities; - crushing facilities or significant dust and particulate generating activities; - on site waste disposal practices; - stockpiles ofoverburden, 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; amount of material processed; 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: a. Stormwater diversion: Describe how and where stormwater will be diverted away from material handling and storage areas to prevent stormwater contamination. b. Materials handling and spill prevention: For materials that could impact stormwater runoff, all existing and planned BMPs that prevent the contamination of stormwater runoff at the site shall be included and described. c. 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. d. Other pollution prevention measures: The plan shall identify any other structural and non-structural measures for stormwater quality control on-site. In each case where stormwater pollution potential exists, appropriate preventive measures must be identified and implemented. 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 the following minimum components, including a schedule for implementing such controls: a. SWMP Administrator - The SWMP shall identify a specific individual(s), position or title who is responsible for developing the SWMP and assisting the mine operator in its implementation, maintenance, and revision. b. Preventive Maintenance - A preventive maintenance program is required, and shall involve inspection and maintenance of stormwater management controls (maintenance of dikes separating mine drainage from stormwater, cleaning oil/water separators and catch basins, etc.) as well as inspecting and testing of equipment and systems to prevent conditions that could cause breakdowns or failures resulting in discharges of pollutants to surface waters. These periodic inspections are different from the comprehensive site evaluation (see Part I.C.I .b., although the former may be incorporated into the latter. Equipment, area, or other inspections are typically visual and are normally conducted on a regular basis (e.g., daily inspections of loading areas). c. Good Housekeeping - The SWMP shall identify good housekeeping procedures that will be followed by the mining operation. Good housekeeping requires the maintenance of a clean, orderly facility. This part of the SWMP shall address cleaning and maintenance schedules, trash collection and disposal practices, grounds maintenance, etc.