Which activity is indicative of class III works?

The activity that is indicative of class III works involves repair activities that specifically involve surfacing asbestos-containing materials (ACM). Class III asbestos work, as defined by regulatory standards, encompasses repair and maintenance operations where the disturbance of ACM is likely to occur. This category often includes actions that may involve minimal exposure but require precautions due to the potential release of asbestos fibers during the repair process.

Repair activities might include putting in patches or other types of containment on structurally damaged surfacing materials containing asbestos. Since these activities could lead to the release of asbestos fibers into the air, they require adherence to specific safety protocols to protect the workers and the surrounding environment.

In contrast, activities such as custodial cleaning that ensures there is no contact with ACM do not disturb asbestos materials and, therefore, do not fall under class III work. Complete removal of ACM represents class I work, which involves significant disturbance and is highly regulated due to the risk of widespread contamination. Risk assessment activities, on the other hand, focus on evaluating the presence of ACM and do not involve physical alteration or repair, placing them outside the scope of class III.