On June 30, 2011, the NRC issued a Notice of Violation to Charleston Radiation Therapy Consultants, PLLC (CRTC) for a Severity Level III violation involving the failure to meet the physical presence requirements of 10 CFR 35.615(f)(2) during high dose radiation (HDR) treatments. Specifically, on an indeterminate number of occasions on and prior to April 28, 2011, neither a CRTC authorized user (AU), nor a physician under the supervision of an AU, was physically present during continuation of patient treatments involving the HDR unit.