On October 11, 2007, a Notice of Violation was issued for a Severity Level III violation of 10 CFR 30.34(i). The violation involved the failure to maintain a minimum of two independent physical controls that formed a tangible barrier to secure a portable gauge from unauthorized removal during a period when the gauge was not under direct control or surveillance. Specifically, two portable gauges were stored in an unlocked storage room located in an unlocked building at one of the licensee's job sites.