What does a safe oxygen level indicate?

A safe oxygen level indicates that the atmosphere is safe for work. In any scenario involving confined spaces, such as when dealing with heating oil tanks, monitoring oxygen levels is crucial for ensuring the safety of personnel. Normal atmospheric oxygen levels typically range from 19.5% to 23.5%. If oxygen levels are within this safe range, it means that there is enough breathable air for workers to perform their duties without risking asphyxiation or other hazards associated with low oxygen environments.

In the context of safety protocols, if a site's oxygen level is too low or too high, it could lead to dangerous situations that necessitate evacuation or the use of personal protective equipment (PPE). Therefore, the measurement of oxygen levels is essential for establishing a safe working environment, specifically confirming that it is safe for workers to proceed with tasks associated with the heating oil tank.