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Customizing Confined Space Containers Constrained spaces are the utility tunnel, a sewer tank, or an underground excavated area. Often times they are closed off, have limited access and could be hazardous to get into. Confined space equipment is designed to minimize, mitigate and prevent these types of risks. It includes monitoring of the atmosphere and personal protective equipment, emergency response procedures, and training. Safety Closed space equipment is designed to protect workers from a r