What is a common hazard associated with confined spaces?

Low oxygen levels are a significant hazard associated with confined spaces because these areas often do not have proper ventilation. This lack of air circulation can lead to dangerously low levels of oxygen, which can pose serious health risks to workers. Oxygen levels below the minimum safe threshold can lead to dizziness, loss of consciousness, and even death if persons are not equipped with proper respiratory protection or an adequate supply of air.

In confined spaces, other hazards like excessive noise levels, slippery surfaces, and visibility obstructions can certainly exist, but low oxygen levels are particularly critical and one of the primary reasons why confined space entry requires stringent safety protocols and monitoring. The potential for rapid onset of incapacitating conditions due to low oxygen makes it vital for those entering such spaces to be trained on monitoring and ensuring atmospheric safety.