Walk-Behind Grinding

		Required Respiratory Protection and Minimum Assigned Protection Factor (AFP)
Equipment/Task	Engineering and Work Practice Control Methods	≤ 4 hours/shift	> 4 hours/shift
Walk-behind Milling Machines and Floor Grinders	Use tool equipped with integrated water delivery system that supplies water to cutting surface. Operate and maintain tool in accordance with manufacturer’s instructions to minimize dust emissions.	None	None
Walk-behind Milling Machines and Floor Grinders	Use machine equipped with dust collection system recommended by the manufacturer. Operate and maintain tool in accordance with manufacturer’s instructions to minimize dust emissions. Dust collector must provide the air flow recommended by the manufacturer, or greater, and have a filter with 99% or greater efficiency and a filter-cleaning mechanism. Dust collector must provide the air flow recommended by the manufacturer, or greater, and have a filter with 99% or greater efficiency and a filter-cleaning mechanism. When used indoors or in an enclosed area use a HEPA-filtered vacuum to remove loose dust in between passes.	None	None

Walk-Behind Grinding Products