Which method involves applying water to asbestos-containing materials before disturbance?

The method that involves applying water to asbestos-containing materials before disturbance is known as wetting methods. This technique is essential because it minimizes the release of airborne asbestos fibers during the handling or removal of materials that contain asbestos. By saturating the material with water, the fibers are kept in place and are less likely to become airborne, which is a critical safety measure when working with such hazardous substances.

Wetting methods are a common best practice in asbestos abatement because they help to protect workers and the environment from the dangers associated with airborne asbestos fibers. The use of water should be conducted carefully to ensure effective saturation without causing any additional issues, like creating a slip hazard or damaging the materials.

The other methods listed, such as encapsulation and enclosure, are distinct processes. Encapsulation involves applying a sealant that binds the asbestos fibers in place to prevent their release, while enclosure refers to the use of airtight barriers to completely isolate asbestos-containing materials. Negative air machines are used as part of the containment process to filter and clean the air in work areas but do not specifically involve wetting the material. Thus, wetting methods are unique in their direct application of water to the materials prior to any disturbance.