What is the recommended action if the LEL reading exceeds 25% in a confined space?

The recommended action when the Lower Explosive Limit (LEL) reading exceeds 25% in a confined space is to evacuate and ventilate the area. At this level, there is a significant risk of an explosion if an ignition source is present. The presence of flammable gases at this concentration means that the atmosphere is hazardous, and personnel should prioritize their safety.

Evacuating the area ensures that everyone moves to a safe distance where they are no longer at risk of potential ignition or explosion. Following evacuation, ventilating the area is crucial to dilute the flammable gas concentration, allowing the environment to return to safe levels before any further work or re-entry occurs. This action aligns with safety protocols that focus on mitigating risk in hazardous environments.

While calling for assistance or conducting further testing for oxygen deficiency are important steps in managing confined space hazards, they should occur after ensuring that individuals are evacuated from immediate danger and the atmosphere is made safe for potential re-entry once the flammable conditions have been addressed. Continuing with the task at hand is contrary to safety practices in situations where high LEL readings indicate imminent risk.