lower-explosive-limit

Is Exactly 10% LEL Safe? OSHA Defines It Two Ways — and Enforces the Stricter One

OSHA's definition says a hazardous atmosphere is flammable gas 'in excess of 10 percent' of the LEL — so 10.0% reads as acceptable. Every other OSHA document says the opposite. This article shows what the enforcement directive actually settles, with verbatim citations.