Because confined spaces offer limited means of entry or exit and may contain hazards, employees must comply with 29 CFR 1910.146 and the UTSA Confined Space Entry Program when working in these areas.
Most confined spaces are actually or potentially hazardous.
Such as signal manholes, electrical manholes, vaults, sewers, tunnels or other structures similarly surrounded by confining surfaces so as to permit the accumulation of dangerous gases, vapors or the exclusion of oxygen. Confined space that contains actually or potentially hazardous atmosphere, or the potential for engulfment by particulate matter or liquid. Physical act of entering a confined space. An entry occurs when a worker's face breaks the plane of the confined space opening. This person monitors the entrants within a confined space and the external surroundings.