What is the safe level of flammable gas in a confined space?

The correct answer indicates that a safe level of flammable gas in a confined space is considered to be less than 10% of the Lower Explosive Limit (LEL). This is a key safety principle in managing the risks associated with flammable gases in confined environments. The LEL represents the minimum concentration of a gas that is needed to ignite and sustain combustion. Therefore, maintaining levels below 10% of the LEL significantly reduces the risk of fire or explosion.

By keeping flammable gas concentrations well below the LEL, workers are afforded a safety buffer that helps to prevent potentially hazardous situations. Monitoring gas levels ensures that the environment remains safe for work, as higher concentrations could quickly reach dangerous levels, leading to explosive hazards if an ignition source is present.

In summary, maintaining gas levels below 10% of the LEL is a widely accepted safety measure in confined space operations, helping to protect workers from the risks associated with flammable gases.