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EPA Region 9 Issued Construction Approvals: Radionuclides

The Clean Air Act requires the EPA to regulate airborne emissions of hazardous air pollutants (HAPs) from a specific list of industrial sources called "source categories." Standards known as the "National Emission Standards for Hazardous Air Pollutants" (NESHAPs) dictate specific regulatory limits for source categories that emit radionuclides. Pursuant to the Clean Air Act (40 CFR §61.08), EPA has authority to grant construction approvals for sources that are subject to these requirements. For more information on these regulatory requirements and how EPA regulates radiation, please see EPA’s website on Radiation Regulations and Laws.

The approvals listed below are for actions starting in 2015. For information related to approvals to construct sources of radionuclides pursuant to 40 C.F.R. §61.08 issued or modified before 2015, please contact Ryder Freed (

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Approval Activity
Facility Name State Type of Project NESHAP Subpart Status Related Documents
Canyon Mine AZ Construction Subpart B – Radon Emissions from Underground Uranium Mines Approved Approval to Construct/Modify the Canyon Underground Uranium Mine