On April 27, 2020, the NRC issued a Notice of Violation and Proposed Imposition of a civil penalty in the amount of $7,500 to Thrasher Engineering Inc. (licensee), for a Severity Level III violation. The violation involved the licensee’s repeat failure to use two independent physical controls that form tangible barriers to secure a portable gauge from unauthorized removal as required by 10 CFR 30.34(i). Specifically, on October 29, 2019, the licensee’s gauge user left a portable gauge in the bed of a pickup truck, with only a single locked case to secure the portable gauge from unauthorized removal, when he was inside the construction site trailer and did not have control and constant surveillance of the portable gauge.