What is the process called that identifies and quantifies hazardous contaminants before entering a confined space?

The process that identifies and quantifies hazardous contaminants before entering a confined space is known as atmospheric assessment. This involves measuring and analyzing specific atmospheric conditions such as the presence of toxic gases, oxygen levels, and flammable substances, ensuring that the environment is safe for entry. Proper atmospheric assessment is crucial for ensuring the safety of rescuers and workers, as it allows for the identification of any potential dangers that may exist within the confined space.

Atmospheric assessment employs various instruments and tools to detect hazardous materials, contributing to informed decision-making regarding necessary precautions or the use of personal protective equipment. It is a foundational step in any confined space operation, as it allows teams to assess risks accurately and take appropriate actions to mitigate them.