On February 19, 2016, the NRC issued a Notice of Violation to Materials Testing Consultants, 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, on August 5, 2015, the licensee stored portable gauges with only a single physical barrier during business hours, and the gauges were not under the control and constant surveillance of the licensee.