On June 27, 2005, a Notice of Violation was issued for a Severity Level III violation involving the failure to control and maintain constant surveillance of licensed material in a portable gauge containing approximately 10 millicuries of cesium-137 and 50 millicuries of americium-241, that was damaged when it was run over by a bulldozer after an authorized gauge operator left it unattended for approximately 10 minutes at a job site.