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.
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