What is an essential action before entering a confined space?

Performing atmospheric testing is a critical action before entering any confined space. This testing is essential because confined spaces can present severe hazards related to air quality, such as toxic gases, low oxygen levels, or flammable atmospheres. By conducting atmospheric testing, you ensure that the environment is safe for personnel to enter. This action allows workers to identify any potential risks and implement necessary controls or precautions before proceeding with the entry.

While providing a briefing, checking for tools, and wearing protective gear are also important safety measures, they come after ensuring that the atmosphere is safe for entry. If the atmosphere is hazardous, no amount of briefing, equipment checks, or protective gear would be sufficient to guarantee safety within that space. Therefore, atmospheric testing stands out as the primary and most urgent action to ensure the health and safety of workers entering confined spaces.