Prior to removing a manhole cover, what is the first thing you should do?

Before removing a manhole cover, testing the atmosphere through an opening in the cover is the essential first step to ensure safety. Manholes can often contain hazardous gases or low oxygen levels that pose risks to workers. This initial atmosphere test is crucial in identifying any potential risks, such as the presence of toxic or explosive gases, which could lead to serious health hazards if not addressed.

By checking the atmosphere first, a worker can determine if it is safe to proceed with the removal of the cover or if additional safety measures are required, such as ventilation or the use of protective equipment. This approach prioritizes safety and risk management, which is vital in maintenance and operations within confined spaces like manholes.