Tertiary Radon Chamber Accreditation
NRSB Accredited Radon Chamber Application (PDF) »
NRSB Chamber Accreditation Policies (PDF) »
A Tertiary Chamber is a facility that meets the requirements of the NRSB “Radon Chamber Accreditation Policy” and successfully performs annual inter-comparisons with the primary reference facility or an accredited secondary chamber. A tertiary chamber may perform exposures for quality assurance, blind spiking tests and authorized calibration for radon devices and instruments within the scope of its accreditation. Tertiary radon chambers shall not be used for proficiency testing or initial acceptance device evaluations.