When working with asbestos, how must all tools that increase asbestos fiber concentration be controlled?

The choice of using a controlled exhaust ventilation system is essential when dealing with asbestos because it effectively reduces airborne concentrations of asbestos fibers in the work environment. This system actively filters the air and removes harmful contaminants, helping to protect workers from inhaling dangerous asbestos fibers that can lead to serious health issues, such as asbestosis or mesothelioma.

A controlled exhaust ventilation system works by drawing contaminated air through filters that capture asbestos fibers before the air is recirculated back into the workspace or released outside. This not only helps maintain safe air quality but also complies with occupational safety and health standards designed to protect workers from exposure.

In contrast, while manual operation and handheld vacuums can mitigate fiber release or capture some dust, they are not as effective or comprehensive as a properly designed and maintained ventilation system. Standard filters might capture large particles, but they may not be sufficient to filter out the smaller asbestos fibers that pose significant health risks. Therefore, the use of a controlled exhaust ventilation system is the most effective and reliable method for managing asbestos fiber concentration during work processes.