2008-02-27_REVISION - M2005050 (3)

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b. Identification of Potential Pollutant Sources and Best Management Practices The Mine Site will be prepared for future mining activity with the clearing of surface area for work surfaces, stockpiling of topsoil, excavation of Stormwater containment basins and placement of storage/equipment facilities. The most likely pollutant source is sediment given the site setting and types of activities to be conducted. The site preparation activities can create sediment as a pollutant source. In order to control this pollution, the site will be prepped with the features shown within the attached Figure 1 and summarized above in subsections 2 and 3. The overland flow dynamics are well understood and were used as the basis for the placement of the Stormwater containment basins, berms etc. With this combination of proposed best management practices it is unlikely that any overland flow of sediment will release from the site. Regardless, the site management features will be continually monitored and maintained in order to control any releases. All other potential pollutant sources (hydraulic fluids, small amounts of fuel) will be stored within the site facilities. All fuel tanks present will have secondary containment structures sized as per EPA spill prevention, control, and countermeasures (SPCC) regulations. Any spills created as a result of these fluids will be immediately managed, contained and cleaned up. The ore pad will be constructed in accordance with Colorado Division of Reclamation, Mining, and Safety General Ore Pad Construction Criteria. i. Stormwater Diversions The following subsection describes the various Stormwater diversions to be constructed as part of the site preparation activities. Stormwater Containment Basin: A Stormwater containment basin will be constructed in the northwest corner of the mine permit boundary (Figure 1). The Stormwater containment basin will allow for significant water retention time and sediment settling. The Stormwater containment basin will be lined with compacted clay in order to prevent infiltration. The stormwater containment basin's capacity was engineered based on a 102,OOsq.ft. drainage area, a 25year/6hour/1.6" event (which equals 13,600cu.ft. of water volume, assuming no evaporation or infiltration). Water within the Stormwater containment basin would be retained and evaporated over time. Water Bars, Berms and Bar Ditches: Bar ditches will be placed to divert water away from ore storage and on-site facilities as well as to route water away from exposed surfaces (which can then create overland flow of sediment). Water bars and berms will be placed to control water energy and route the water to the Stormwater containment basins. Bluerock Energy Corp. J Birds Mine: Stormwater Management Permit Application 12/l3/07 ~5-