Class II works typically exclude which of the following?

Class II asbestos work primarily involves the handling of non-friable asbestos-containing material, specifically those materials that are not easily crumbled or reduced to powder. This classification typically encompasses tasks like the removal of non-friable materials, which can include certain types of insulation or other materials where the asbestos is firmly bound.

The correct choice pertains to the repair and maintenance of thermal system insulation (TSI), which is categorized as Class I work. TSI generally refers to insulation materials that may be friable, and handling or maintenance of these materials requires adherence to stricter safety protocols due to the higher risks associated with airborne asbestos fibers during such activities.

Other tasks mentioned, such as the removal of surfacing materials, activities involving wallboard removal, and working on non-friable materials, do not fall outside the scope of Class II work. They can be part of various asbestos management strategies, as they do not inherently involve the same level of risk and the more stringent procedures outlined for Class I. Thus, repair and maintenance of TSI is correctly identified as excluded from Class II work classifications.