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Some ofthe dust you see coming from the Moab site contains particles from the uraniummill tailings pile. Radioactive particulate material (radioparticulates) andgamma radiation is measured at monitoring stations located around the Moab siteand at various off-site locations. Although the annual readings at severalon-site locations is greater than the U.S. Department of Energy limit of 100 milliremsper year (mrem/yr) above background, no member of the public occupies anyof these locations for a sufficient amount of time that would cause theindividual to receive a dose in excess of the annual limit. In addition, the totaleffective dose to the maximally exposed individual, or the representative personor group from the public likely to receive the most radiation dose based onexposure pathways and parameters, is well below the 100 mrem/yr abovebackground limit. Dust-generating activities at the Moab site are shut down atsustained wind speeds exceeding 20 miles per hour.
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None of the Moab site is currently open for public use.
Windblown tailings could create fugitive dust emissions. An effective dust control system is currently in place and will continue to be implemented during remedial activities. Water for dust control is stored in a tank or in a freshwater storage pond and is applied using water trucks or water wagons. Non-hazardous dust suppressants such as calcium chloride solution, stored in tanks, are also used.
Personnel certified in reading opacity measurements monitor visible emissions to determine when active dust control measures (e.g. application of water) should be initiated and when dust-generating activities (e.g. excavating, hauling, grading) should be discontinued to maintain 20 percent or less opacity.
257 E. Center St.Moab, Utah
Library HoursMonday - Friday9 a.m. - 8 p.m.
Saturday9 a.m. - 5 p.m.
Sunday & Legal HolidaysClosed
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