A confined space under OSHA 29 CFR 1910.146 is a space that: (1) is large enough for an employee to enter and perform work, (2) has limited means of entry or exit, and (3) is not designed for continuous occupancy. A permit-required confined space additionally contains or has the potential to contain a hazardous atmosphere, engulfment hazard, internal configuration that could trap an entrant, or any other recognized serious safety or health hazard. Examples include tanks, vessels, silos, storage bins, pits, and manholes. Entry requires atmospheric testing (O2, LEL, toxics), a written entry permit, an attendant, and rescue provisions. BlueHive partners with employers requiring confined space entry certifications and related physical evaluations.