What must be done to vents and air ducts inside the work area?

The requirement to cover vents and air ducts inside the work area with two layers of 6 mil polyethylene plastic serves several important purposes in asbestos abatement procedures. Firstly, this layering provides an effective barrier that helps to prevent the spread of asbestos fibers into other areas of the building during the abatement process. As asbestos is a hazardous material, containing any potential release is crucial to ensure the safety of workers and occupants in surrounding areas.

Using two layers of 6 mil poly adds additional strength and durability compared to a single layer, minimizing the risk of tearing or puncturing during installation or throughout the abatement work. This protective measure aligns with the best practices outlined in regulations and safety guidelines for asbestos handling, ensuring that air quality is not compromised and that the area remains sealed off.

The other options do not meet these safety standards, as they either suggest insufficient protection or imply that no action is necessary, which is inadequate for managing the risks associated with asbestos exposure.