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.
Courtesy of OSHA
The OSHA findings on brake washers and asbestos exposure