Which of the following methods offers a firefighter the safest way to reduce the possibility of inhalation exposures during overhaul?

The safest way for a firefighter to reduce the risk of inhalation exposure during overhaul is to not remove the self-contained breathing apparatus (SCBA) at all. This practice ensures continual protection from harmful gases, smoke, and particulate matter that could still be present even after the fire appears to be extinguished.

During the overhaul phase, conditions can change rapidly, and residual toxic substances may still be in the environment. Keeping the SCBA on provides a direct line of defense, allowing firefighters to operate safely without risking exposure to potentially harmful inhalants.

While testing the atmosphere and using a multi-gas meter can provide valuable information about air quality, these methods may not account for all possible hazards present, especially when they are operating in confined spaces or areas where air circulation is poor. The option of waiting for an 'all clear' signal before removing SCBA offers some level of assurance but can still be risky if environmental conditions shift unexpectedly before that signal is given. Therefore, keeping the SCBA on at all times during this critical phase is the most prudent approach to ensure safety from inhalation hazards.