What is required if there are atmospheric hazards present in a confined space?

When atmospheric hazards are present in a confined space, testing for safe oxygen levels and toxic gases is essential to ensure the safety of those entering the area. This process typically involves using calibrated gas detection equipment to measure the concentrations of various gases, including oxygen, carbon monoxide, hydrogen sulfide, and other hazardous substances. By conducting this testing prior to entry and continuously monitoring the atmosphere, workers can identify dangerous conditions and take appropriate action to mitigate risks, such as ensuring adequate ventilation or wearing appropriate personal protective equipment. Establishing safe levels helps prevent accidents, injuries, or fatalities caused by insufficient oxygen or exposure to toxic substances.

While other options may seem relevant, such as immediate evacuation or notifying a supervisor, these are typically actions that should be taken after confirming hazardous conditions rather than proactive measures required beforehand. Using flashlights for visibility is also important but does not address the immediate risk associated with atmospheric hazards that threaten health and safety.