> "We actually not only saw people who were directly cutting and grinding the stone, but we saw people who were just sweeping up the work site after the stone had been cut," says Rose. "They were exposed to the silica particles that were suspended in the air just with housekeeping duties."
So, basically everyone needs to wear a P100 all the time when on site until the site has totally been cleaned up. In a manufacturing environment, if you're on the floor you wear a mask and there must be a dust collection system and tools that perform dust collection or mitigation. In this case that'd be water saws.
Read the threads here, a lot people don't like wearing respirators. The outcome isn't surprising.
https://www.npr.org/sections/health-shots/2019/10/02/7660282...