What should you do if a LEL reading is greater than 10% in a confined space?

When a Lower Explosive Limit (LEL) reading exceeds 10% in a confined space, it indicates an explosive atmosphere that poses a significant risk for combustion or explosion. The primary concern is safety; hence, the most appropriate response is to leave the area immediately. This action is critical to ensuring the safety of all personnel present, as the risk of ignition could lead to catastrophic outcomes.

In confined spaces, any source of ignition, such as electrical equipment, open flames, or heat sources, could trigger an explosion, making quick evacuation essential. While monitoring levels, evacuating non-essential personnel, and starting ventilation procedures might seem prudent under certain circumstances, they do not adequately address the immediate danger posed by an LEL reading above 10%. Therefore, the prompt and decisive action of vacating the space is imperative in protecting life and health in hazardous environments.