On April 2, 2002, a Notice of Violation was issued for a Severity Level III violation involving the failure to secure from unauthorized removal or limit the access to licensed material (13 Troxler Series 3400 moisture density gauges each containing a nominal 10 millicuries of cesium-137 and a nominal 50 millicuries of americium-241) in an unrestricted area, and failure to control or maintain constant surveillance of this licensed material.