In this new Fact Sheet OSHA reminds us combustible dusts shall be collected by using a “properly designed, installed, approved and maintained dust collection system.” Portable vacuum cleaners shall be NRTL certified and classified for the type of dust it…

In this case an electric shop vacuum that is not approved for hazardous locations was used to clean up Class II Combustible Dust. https://www.osha.gov/ooc/citations/UngererCompany_1116984.pdf

Here is an example reported by OSHA where combustible particulate solids were not collected into an adequately designed dust collection system. OSHA reminds us that “An effective dust collection system, proper industrial hygiene and frequent cleaning are critical to preventing…

OSHA Dust Control Recommendations: • Implement a hazardous dust inspection, testing, housekeeping, and control program; • Use proper dust collection systems and filters; • Minimize the escape of dust from process equipment or ventilation systems; • Use surfaces that minimize…

“Is it acceptable to use portable wet/dry vacuum cleaners for cleaning up wood and aluminum dust and shavings?” Answer from OSHA to a Safety and Environmental Coordinator https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=INTERPRETATIONS&p_id=24638