On November 15, 2017, the NRC issued a Notice of Violation to Terracon Consultants, Inc., for a Severity Level III violation of 10 CFR 20.1802. Specifically, on December 21, 2016, the licensee failed to maintain constant surveillance of a portable gauge when the technician walked away from the gauge to inspect another part of the jobsite. The violation resulted in a steel drum roller damaging the gauge.