Employee exposure monitoring has been performed by the state workers' compensation program. While they are near the PEL, achieving compliance with a reduced PEL would be more difficult. There is no reason to use a more rigorous respirator. Silica exposures have been reduced substantially over the last 10 to 15 years. The association also provides training and education to employees on the hazards of exposure to silica.
Wet methods are the best control method for demolition operations.
Half-mask respirators equipped with HEPA filters are also used for demolition work on concrete. This stakeholder stated that exposure monitoring conducted over the last two years showed only two cases in excess of the current PEL and that therefore a reduction in the PEL by half would be acceptable. A stakeholder from the construction industry noted that bystander exposure is a significant concern. He described a case in which a tuckpointer was working in an occupied building where the building owner was reluctant to shut down the HVAC system, thus potentially exposing the building occupants. Employees use safety equipment and respirators and stay upwind of the dust.