What does "confined space" mean in HAZMAT terminology?

In HAZMAT terminology, a "confined space" refers to an area with limited entry and exit points. This definition highlights the unique hazards associated with such spaces, where confined access can pose significant risks to personnel. These areas may also have poor ventilation, which can lead to the accumulation of hazardous atmospheres, potentially causing health risks during work operations.

Confined spaces are typically not designed for continuous human occupancy, and understanding the characteristics of these areas is crucial for ensuring proper safety measures and rescue procedures are in place. Workers in confined spaces may be exposed to toxic fumes, low oxygen levels, or other dangerous conditions, which underscores the importance of specialized training and equipment when working in these environments.