The Study Recommendations

Direct reading monitors used to measure dust levels, although not necessarily specific for asbestos fibers, can indicate activities where there is a potential asbestos exposure.

Analysis of the video and real-time data indicates that some dust emissions may be reduced by altering work practices, such as:

Allowing the cleansing fluid to flow between the brake drum and brake support plate before the drum is removed, and

After removing the brake drum, thoroughly wetting contaminated surfaces before the operator starts to manually remove the old shoes. To determine actual asbestos exposures, air samples collected on the appropriate filters are still needed.

see also:

Asbestos Dust Levels Measuring Dust Levels for Asbestos Brake Maintenance Workers
Are asbestos dust levels safe for brake maintenance workers?

Brake Servicing Case Study Brake Servicing Case Study on Asbestos
OHSA case study on asbestos exposure after brake servicing

Brake Servicing Mechanics Read a Case Study on Brake Servicing Mechanics and the Asbestos Danger
OSHA provides info on asbestos exposure for brake servicing mechanics