309 posted 3 years ago by JediMasterPepe 3 years ago by JediMasterPepe +309 / -0 54 comments share 54 comments share save hide report block hide replies
In the preamble to the final Respiratory Protection Standard, OSHA discussed extensively its rationale for requiring that employees breathe air consisting of at least 19.5 percent oxygen. https://www.osha.gov/laws-regs/standardinterpretations/2007-04-02-0