Which of the following describes the focus of class III works?

Class III work primarily involves repair operations where asbestos-containing materials (ACM) might be disturbed. This is crucial because, during repair activities in buildings or structures that contain ACM, there is a heightened risk that the materials could be disturbed, potentially releasing harmful fibers into the air. Therefore, personnel engaged in class III work must be trained to handle the materials safely and to implement proper safety measures to minimize exposure both to themselves and to others in the vicinity.

The focus on this class of work underscores the need for awareness regarding the handling of ACM during maintenance and renovations, where the risk of disturbance is significant. Understanding the nature of class III work is part of a broader framework of regulations and safety practices designed to protect workers and the public from the dangers of asbestos exposure.

Other choices do not accurately reflect the specific nature of class III activities. For instance, activities that do not involve contact with ACM would fall under a different category, as would removal operations and waste disposal, which are classified differently based on the level of risk and type of work involved.