An exposed waste impoundment cell at the Energy Fuels’ White Mesa Mill in southeast Utah is out of compliance with federal Clean Air Act standards, according to the Environmental Protection Agency and Utah Department of Environmental Quality.
The 40-acre Cell 4B permanently stores hazardous wastes from the mill’s uranium milling process and from off-site deliveries. It is supposed to have a water cover over waste solids to reduce radon emissions and prevent hazardous material from blowing away in the wind...