QEHSOperations
Confined Space Entry
Entry into a space not designed for continuous occupancy with limited egress.
OSHA 29 CFR 1910.146 defines permit-required confined spaces as those with a serious hazard (atmospheric, engulfment, entrapment, or other). Entry requires: atmospheric testing (O2, LEL, toxic gases), isolation and lockout of energy and fluids, a written entry permit, an attendant outside, and a rescue plan. NFPA 350 provides additional guidance.