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Liberty Mining, LLC <br />DRMS 110 -d Permit Application <br />October 2013 <br />The most effective methods for decreasing radiation exposure are time, distance and shielding. <br />Minimizing the amount of time miners are exposed to radiation, maximizing the distance from <br />the radioactive source and shielding the gamma radiation from contacting workers are methods <br />that will be utilized during the operation at the Liberty Mine to minimize radiation exposure and <br />protect mine workers: <br />1. Time — The amount of time that workers are exposed to areas with higher levels of <br />radiation will be limited. At the Liberty Mine specifically, the underground mine <br />ventilation exhaust points and the surface ore stockpile pad are the areas of highest <br />concern. These areas will have the highest levels of radioactivity and will therefore be <br />restricted from any unnecessary or continuous occupancy. Before daily work begins, the <br />underground mine workings atmosphere will be purged using the mine ventilation <br />system for a period of time adequate to flush the underground workings of accumulated <br />radon gas. This practice will be implemented any time the mine has been dormant or <br />when the ventilation system has not operated for any period of time. Underground <br />mining operations will cease at any time that the ventilation system is not in operation. <br />Underground operations are prohibited when proper ventilation is not provided. When <br />uranium is exposed at the working face of the mine, workers will be limited in the amount <br />of time they spend in the underground operations. <br />2. Distance — Generally, each increase in distance from radioactive sources reduces <br />exposure levels by two times. Areas of the Liberty Mine operations with exposed <br />radioactive sources will have limited access by mine workers, and access by <br />unnecessary visitors and the general public will be prohibited. Signs warning all <br />personnel and visitors of potential radiation exposure will be posted at the mine <br />operations site entrance and around the mine operations limits, as necessary. The mine <br />access road is over one half mile in length. A locking gate is installed at the furthest <br />possible point from the mining activities and will be secured during periods of inactivity of <br />mining operations. The mine portals and any boreholes will also be fenced to restrict <br />access by unnecessary workers, visitors or unauthorized persons. The closest potential <br />residence to the mine site is approximately 1.9 miles away. <br />3. Shielding — Forced air ventilation is the best shielding technique for underground mine <br />operations. The use of respiratory protection (respirators, particulate masks) is an <br />additional step implemented when mine workers are in areas of elevated particulate <br />matter. To reduce the amount of dust and airborne radioactive particles, continuous <br />dust suppression will be implemented during mining operations. Water or non -toxic dust <br />control agents will be applied to roadways and stockpiles to mitigate fugitive particle <br />emissions. <br />During periods of planned inactivity, the mine site will be secured to prevent unauthorized entry. <br />Continuous maintenance of security features (fencing, gates, signs, etc.) will be conducted to <br />ensure site restriction. Routine inspections for dust and stormwater control features will prevent <br />off site migration of radiation. <br />For periods of planned prolonged inactivity (i.e. greater than 180 days) at the mine site, <br />additional steps will be taken to prevent off site migration of radiation. If possible, the ore <br />Liberty Mining, LLC Moab, Utah SMA Ref. 5821897 Page 55 <br />