On September 30, 2021, the NRC issued a Notice of Violation and Proposed Imposition of Civil Penalty in the amount of $45,000 to Terracon Consultants, Inc. (Licensee) for five violations. The violations consist of a Severity Level (SL) III problem associated with three (A+B+C) related violations, a SL III violation (D), and a SL IV violation (E). The violations involved the licensee’s failure to: (A) control and maintain constant surveillance of licensed material in a controlled or unrestricted area and that is not in storage as required by Title 10 of the Code of Federal Regulations (10 CFR) 20.1802 and 30.34(i); (B) block and brace licensed material from movement incident to normal transportation in accordance with 10 CFR 71.5(a); (C) follow operating and emergency procedures associated with the license, which included the requirement for the gauge user to use a Department of transportation Type A container; (D) lock the gauge’s handle of the source rod or place the gauge inside of a locked container to prevent unauthorized or accidental removal of the source rod from its shielded position, as required by a License Condition; and (E) immediately report the loss of gauge as required by 10 CFR 20.2201. Specifically, On November 25, 2019, a licensee’s former technician willfully failed to follow licensee procedures and NRC requirements to secure a portable nuclear gauge. As a result, a portable gauge fell off a vehicle during transportation and remained uncontrolled in the public domain for few hours and the licensee did not notify the NRC immediately following discovery of the missing gauge.