What is the maximum allowable lower explosion level for a confined space?

The maximum allowable lower explosion level (LEL) for a confined space is typically set at 10% of the LEL of the specific flammable gas or vapor present. This threshold ensures that the atmosphere is adequately safe for entry and work, minimizing the risk of an explosive environment. It's crucial for safety protocols to continuously monitor these levels to prevent any potential hazards. Always refer to relevant safety standards and regulations for specific guidance.