2009-05-19_REVISION - M1977285 (32)

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COR-030000 Stormwater Management Plan Materials management and spill prevention techniques are essential to prevent pollution of receiving drainages. Once pollution prevention measures are implemented, Denison is responsible to maintain good housekeeping practices on the project site. This section discusses the specific BMPs that are critical to prevent discharge of stormwater pollutants to receiving waters. Emergency contacts for the project will be posted at the project office and are in Appendix D with the spill report form. In the event of a spill, a spill report form should be completed (Appendix D). Non-sediment pollutants that may be present during mining activities include: • Petroleum products including fuel, lubricants, and hydraulic fluids • Concrete • Paints • Magnesium chloride and calcium chloride These materials, and other materials used during project activity with the potential to impact stormwater, will be stored, managed, used, and disposed of in a manner that minimizes the potential for releases to the environment and especially into stormwater. A Spill Prevention, Control and Countermeasure (SPCC) Plan has been prepared for this site (URS 2007). i) Materials Handling The following practices will be used throughout the project to reduce the potential for spills: • Potential pollutants will be stored and used in a manner consistent with the manufacturer's instructions in a secure location. To the extent practicable, material storage areas will not be located near storm drainage areas and may be equipped with covers, roofs, or secondary containment as needed to prevent stormwater from contacting stored materials. Chemicals that are not compatible shall be stored in segregated areas so that spilled materials cannot combine and react. • Materials disposal will be in accordance with the manufacturer's instructions and applicable local, state, and federal regulations. • Materials no longer required will be removed from the sites as soon as practicable. • Adequate garbage, waste, and sanitary waste handling and disposal facilities will be provided to the extent necessary to keep sites clear of obstruction and BMPs clear and functional. • Pollutants, including waste materials and demolition debris, will be handled in a way that does not contaminate stormwater. • Chemicals, including liquid products, petroleum products, water treatment chemicals, and wastes stored on site will be covered, contained and protected r' from vandalism. Denison Mines (USA) Corp. Sunday Mines SWMP 16