On November 9, 2011, the NRC issued a Notice of Violation to Cardinal Health PET Manufacturing Services, Inc., for a Severity Level III violation involving the failure to monitor the occupational exposure to an adult who was likely to receive, in one year from sources external to the body, an extremity dose in excess of 5 rem as required by 10 CFR 20.1502(a)(1). Specifically, on June 16, 2010, a Cardinal Health PET Manufacturing Services employee removed his extremity (ring) dosimetry on two separate occasions prior to handling a chemical cartridge containing approximately 4 curies of fluorine-18.