On September 5, 2018, the NRC issued a Notice of Violation to Jefferson Asphalt Company. The violation involved the licensee's failure to control and maintain constant surveillance of a licensed portable gauge in an unrestricted area, and failure to use a minimum of two independent physical controls to secure the gauge from unauthorized removal when the gauge was not under the control and constant surveillance of the licensee. Specifically, on April 17, 2018, while the authorized user was troubleshooting the printer associated with an asphalt content gauge in a separate trailer from the one housing the gauge, the authorized user failed to secure the gauge with any physical controls and did not maintain control and constant surveillance of the gauge for a period of greater than five minutes.