On February 2, 2016, the NRC issued a Notice of Violation to Whitworth-Muench, Inc., for a Severity Level III violation. The violation involved the failure to use a minimum of two independent physical controls that form tangible barriers to secure portable gauges from unauthorized removal when the portable gauges were not under the control and constant surveillance of the licensee as required by 10 CFR 30.34(i). Specifically, from approximately July 18 and August 18, 2015, a locked pantry door provided the single physical barrier against unauthorized removal of the licensee's portable gauges.