Originally Posted by
TransWorld
No facial hair is a standard requirement for anyone working in a chemical plant, oil refinery, etc. An O2 mask fit test and training for a SCOTT air pack (like Fire Fighters wear) is mandatory once a year. Even a contract construction or maintenance worker entering an operating plant is required to shave or is forbidden from entering.
Yeah it seems pretty obvious that if there is hair, regardless of how fine it may be, would allow a gap.