According to part 4731.4170, a licensee must maintain records of:
direct reading dosimeter readings and yearly operability checks according to part 4731.4170, subparts 2 and 3, for three years after the record is made;
estimates of exposures as a result of off-scale personal direct reading dosimeters or lost or damaged personnel dosimeters until the commissioner terminates the license.
29 SR 755; 46 SR 791
May 26, 2022
Official Publication of the State of Minnesota
Revisor of Statutes