Where must all critical barriers be installed according to regulation 8?

The installation of critical barriers is specifically required at all penetrations into the work area to effectively contain asbestos fibers and prevent them from escaping into areas where they could pose a health risk. This regulation is crucial for maintaining safety standards during asbestos abatement projects.

By placing barriers at penetrations, which includes areas such as doors, windows, duct openings, and any other points of entry or exit where asbestos could potentially migrate, it ensures that the containment measures are robust. This is essential because penetrations are common points at which airborne contaminants might leak out of the designated work area, thus increasing the risk to workers and the public.

While critical barriers may also be relevant at various other locations like entrances or building perimeters, their primary focus and effectiveness are most vital at the specific penetrations that directly connect the work area to other spaces. Therefore, ensuring that barriers are correctly positioned at these critical points aligns with best practices in asbestos safety management.