Even though there are whistle-blower protection laws, they aren't good enough. No-one should fear risking their job when they stand up for their own health.
Management on the other hand should enforce masks as a means to avoid liability.
What should happen is if someone sees it they call 911 and the cops show up. Followed by the county permit inspector. And then the owner gets arrested and the job site shut down for 6-12 months. Seriously that's what happened at friends workplace when an electrician got fried working on a live 440 volt panel. Don't see why a counter top shop should be treated any different.
Management on the other hand should enforce masks as a means to avoid liability.