On March 31, 2003, a Notice of Violation was issued for a Severity Level III problem involving (1) the failure to control and maintain constant surveillance of licensed byproduct material (three portable moisture density gauges, each containing approximately 10 millicuries of cesium-137 and 50 millicuries of americium-241, and three portable density gauges each containing approximately 8 millicuries of cesium-137 and 40 millicuries of americium-241) in use at a temporary job site; and (2) the failure to lock the operating handle or the storage container of a portable gauge in storage so as to prevent unauthorized or accidental removal of the sealed source from its shielded position.