The National Emission Standards for Hazardous Air Pollutants (NESHAPS) are air quality standards issued under the Clean Air Act. The Idaho Department of Environmental Quality website provides a good description of NESHAPS.
Boeing prepares and submits an annual NESHAPS report for radionuclides to the U.S. Department of Energy (DOE), who in turn, submits the report to the U.S. Environmental Protection Agency (EPA). This report contains results of the radiological monitoring from various sources. Annual exposure estimates at the Energy Technology Engineering Center (ETEC) fall below the limits allowed under NESHAPS. Results of the NESHAPS monitoring are contained in the Boeing Annual Site Environmental Reports.