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2.4.3 Surface Facilities <br /> 2.4.3.1 Ancillary Buildings <br /> An office-mine services complex will be constructed on a 130-foot x 70-foot x 6-inch concrete <br /> slab foundation and contain two connected 60-foot x 60-foot sections.The east section will be <br /> created from an assembly of prefabricated components and will contain administration and <br /> technical staff offices, a mine dry (changing rooms), washroom facilities, lunchroom/meeting <br /> room and an emergency response/first aid room.The west section will contain a maintenance <br /> shop to provide mechanical, electrical and instrumentation facilities as well as warehouse and <br /> parts storage facility.The west section will be constructed with a roof structure supported on <br /> sea can walls to provide service bays for mobile equipment as well as storage space. <br /> Assay and metallurgical laboratories will be housed in a portable trailer assembled off-site with <br /> all necessary test and safety equipment. The trailer will be hauled to site and placed and <br /> secured on blocking near the process plant building to provide daily and shift quality monitoring <br /> information on solids and water samples for the safe and efficient operation of the mill and <br /> mine. <br /> 2.4.3.2 Mine Dewatering <br /> Water that accumulates at the active face will be pumped away using a small pneumatic <br /> diaphragm pump (Wilden type pump) or a small electric pump, using 2-inch steel or PVC pipe <br /> from the face to the sump. <br /> Underground dewatering water will be collected in sumps underground where the water will be <br /> allowed to settle. These initial underground sumps will allow settling of suspended solids.The <br /> sump system will be designed so that the slimes can be cleaned out periodically. After initial <br /> settling,the "clean" water will be pumped in stages,to the surface for clarification and use in <br /> the mill. <br /> A permanent pumping station will be constructed at the bottom of the mine that will pump the <br /> "clean"water to two storage tanks, approximately 5000 gallons each, on the surface near the <br /> portal. At the beginning of each shift,the tank will be opened and checked for a petroleum <br /> sheen. In the event a petroleum product sheen is observed in the tank, it will be skimmed off <br /> the water surface. This water will be used in the mill, in the mine and for fire mitigation if <br /> necessary.The pumping arrangement will be set up as a redundant parallel system, with either <br /> side capable of providing mine dewatering without the other. <br /> 2.4.3.3 Fuel and Oil Storage <br /> Diesel fuel will be stored on site in two 4200-gallon steel tanks located on the north end of the <br /> mill pad. This provides easy access to the portal to supply the mobile equipment that will only <br /> be used on site. Engine oil and hydraulic oil will be stored in 55 gallon drums stored at the <br /> maintenance facility. Secondary containment will be provided for all petroleum products. A Spill <br /> Control, Containment, and Contingency (SPCC) Plan will be prepared and implemented for the <br /> site in accordance with federal and state regulations, as the total aboveground storage of fuel <br /> and oil in containers of 55 gallons or more will exceed 1,320 gallons. <br /> 15 <br />