On December 21, 2017, the NRC issued a Notice of Violation to K & S Engineers, Inc. for a Severity Level III violation. The violation involved a failure to control and maintain constant surveillance and failure to use two independent physical controls that form tangible barriers to secure a portable gauge from unauthorized removal as required by 10 CFR 20.1801 and 30.34(i). Specifically, on several occasions, including July 25, 2017, the licensee stored a portable gauge in an unlocked storage room with one lock securing the gauge case lid and a single chain with one lock securing one handle on the gauge case to a workbench. The keys to the padlock on the gauge case and the padlock on the single chain were located on the workbench approximately one foot away from the gauge and there were no individuals continuously present to maintain control or constant surveillance.