On June 21, 2017, the NRC issued a Notice of Violation to ERP Federal Mining Complex, LLC, for a Severity Level III problem for two related violations. The first violation involved a failure to assign a specific individual to fulfill the duties and responsibilities of Radiation Safety Officer (RSO) as required by the NRC License Condition No. 12. Specifically, on January 25, 2017, the individual named as the RSO in Condition 12 of the NRC license, resigned from employment and the licensee did not submit an amendment request for the new RSO until April 26, 2017. The second violation involved a failure to control and maintain constant surveillance of the licensed material as required by 10 CFR 20.1802. Specifically, on February 5, 2017, a fixed gauge was left without any monitoring until it was transferred to a secured storage location on February 9, 2017.