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3.0 Water Treatment Process <br />The flow sheet presented on LYntek drawing 07004A-F-0 1 Rev Iprovides an overview of <br />the treatment process (See Appendix A for all drawings). <br />Lyntek constructed a mobile, trailer-mounted treatment system for treating the mine <br />discharge water. The layout of the various treatment components within the trailer is <br />shown on drawing 07004A-G-0 1 Rev 1. The treated water will be released to the existing <br />natural drainage. The resulting sludge will be collected in a lined tank for future disposal <br />of the formed solids. <br />3.1 Untreated Water Storage Tank <br />Water from the mine will be pumped at a sufficient flow rate to keep the underground <br />workings dry for day to-day work. The water will be pumped to the Untreated Water <br />Tank where suspended solids will settle out prior to pumping the water to the treatment <br />plant. The Untreated Water Tank has dimensions of 68 feet by 68 feet by 4.75 feet high. <br />The tank is lined with two 30 mil, reinforced synthetic liners. Leak detection is provided <br />by an 8-oz. geotextile fabric that is located between the two liners and equipped with a <br />dip tube leak detector. Additional information regarding the liner system for the storage <br />tanks may be found in Energy Fuel's as-built report for the facility. <br />The Untreated Water Tank has approximately 22,000 cubic feet of storage (equivalent to <br />164,000 gallons of untreated water). Allowing for a minimum of 3 inches of freeboard <br />(equivalent to the 100-year storm event), the tank has a maximum storage capacity during <br />normal exploration operations of 155,000 gallons. When the new ore pad is constructed <br />as part of proposed mining operations, the overflow from the catch basin for the ore pad <br />will be directed to the Untreated Water Tank. At that time, 40,000 gallons of additional <br />capacity will be maintained at all times in the untreated water tank. This is equivalent to a <br />minimum freeboard of about 1.5 feet. <br />The tank can hold 11 days of projected ground water inflow into the mine (i.e., <br />conservative estimate of 7 GPM or 10,000 gallons a day) plus 49,000 gallons of direct <br />precipitation and projected surface water runoff from a future ore pad in the event of a <br />100-year storm event. Under normal circumstances, an operating volume of 50,000 <br />gallons (equivalent to 1.5 feet of water) would be stored in the tank. This would allow for <br />six days of continued pumping at 7 GPM in the event that the treatment system needed to <br />be repaired. <br />To prevent overflow of the Untreated Water Tank, a level sensor will be installed in the <br />tank and will be interconnected to the mine water pump. If the tank should ever reach the <br />preset maximum level, the level sensor would automatically shut off the mine pump until <br />the water level in the tank is lowered. Installation and operation of the level sensor is <br />discussed in more detail in Section 6.0, Monitoring Systems. <br />• <br />8