Before entering a manhole or confined space, what must be checked?

Before entering a manhole or confined space, it is crucial to check the air quality. This is essential because confined spaces can have hazardous atmospheres that may not be immediately visible. Factors such as the presence of toxic gases, oxygen deficiency, or flammable conditions can pose serious risks to workers. Proper testing of the air quality allows for the assessment of these dangers and ensures that it is safe to enter. Workers must use appropriate monitoring equipment to confirm the air quality meets safety standards, as inadequate oxygen levels or the presence of harmful substances can lead to severe health hazards or accidents.

While monitoring temperature, noise levels, and lighting conditions is important for overall safety and comfort in certain circumstances, the integrity of the air quality is the primary concern when dealing with confined spaces. Ensuring that air quality is safe is the most critical first step in any confined space entry protocol.