2001-12-11_PERMIT FILE - C1981014A (3)

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PART 1 Page 9 of 20 Permi[ No. COR-040000 C. STORMWATER MANAGEMENT PLAN -INACTIVE MINES (cont.) i • 3. Stormwater Manaeement Controls -Identification of Sources and Best Manaeement Practices The SWMP shall identify potential sources of pollutants a[ the site and assess the potential of these sources to contribute pollutants to stormwater discharges associa[ed with [Wining activities. The SWMP must also describe appropriate Best Management practices (BMPs) to reduce [he potential of these sources to contribute pollutants to stormwater discharges. The appropriateness and priorities of controls in the plan shall reflect identified potential sources of pollutants at the mining site. The description of the BMPs shall include: a. Stormwater Diversion: Describe how and where stormwa[er will be diverted away from potential pollutant sources [o prevent s[ormwa[er contamination. b. Sediment and Erosion Prevention: Describe practices tha[ will be used to reduce erosion and prevent sedimen[ delivery to State waters. These could include structural (such as silt fences, sedimen[ ponds, drop structures, check dams) and non-s[ructural (such as mulching and revegetation) methods. 4. Comprehensive Insoedion The SWMP shall identify qualified personnel that shall inspec[ designated areas. InspectioWS required by this part shall be conducted annually. Where amual inspec[ions are impracticable, certification is required once every three years by a Registered Professional Engineer [hat the site is in compliance with the SWMP. 5. Additional SWMP Items for Sites Seekine Permit Termination Additional requirements apply in the event that the permittee wishes [o remediate the inactive mine site and • [erminate permit coverage. If the site is already covered by this permit, the permittce shall notify the Division as to f the change in status. Notification shall be prior to the implementation of the remediation work, if possible. The SWMP must be amended to include the following items, prior to implementation of the remediation work, if possible: a. Documentation of Permission: The plan shall include documentation of permission from the land owner, if the remediation work is undertaken by someone other than the land owner. b. Photographs: The plan shall include photographs documenting the condition of the inactive mine site before any remedial action has occurred. For recently active mines, photographs of the active mining phase tray be substituted. c. Description of Remedial Action: The plan shall describe the remedial action that will take place to minimise or elimina[e the water quality impacts from the mine waste. The description shall include: - Remediation Goal Sta[ement; - the charaaeristics of the mineralogic content of the mine-waste, and estimated volume of the waste; - description of any materials tha[ will be mixed into the mine waste on site; and - estimated surface azea of the fmal site, and estimated angle of side slopes. Description of BMPs during Remediation AMivities: The plan shall describe BMPs that will be implemented [o reduce the potential of remediation activities to contribute pollutants to stormwater discharges. Activities that shall be addressed include vehicle maintenance, earth moving, material storage and spill prevention. e. Procedures for Disposal of Water Stored Within Mine Waste: The permi[tce must describe how any water scored within the mine waste will be collected and/or routed [o any storage or treatmen[ facilities. No discharge of Otis water shall be made to waters of the state, unless separate permit coverage is obtained. • f. Description of Permanent BMPs, Final Site Stabilvation, and Ukimate Land Use: The plan shall include a description of the specific permanent measures that will be installed or used a[ the mine-waste site. The description shall include any of the following if appropriate: specifications for capping or isolazion of the