What is the safe oxygen level range that must be monitored before entry into trenches or confined spaces?

What is the safe oxygen level range that must be monitored before entry into trenches or confined spaces?

• A. 19.5% - 23.5%
• B. 20% - 25%
• C. 18% - 22%
• D. 21% - 24%

Answer: (A)

The safe oxygen level range that must be monitored before entry into trenches or confined spaces is 19.5% to 23.5%. This range is critical because oxygen concentrations below 19.5% can pose a risk of asphyxiation, while levels above 23.5% can lead to increased fire hazards, as higher concentrations of oxygen support combustion. Ensuring that oxygen levels are maintained within this specific range is an essential safety practice to protect workers from potential hazards associated with confined spaces and trenches. Monitoring this range allows for the assessment of a safe environment for workers, minimizing the risk of health emergencies related to oxygen deficiency or excess.

The safe oxygen level range that must be monitored before entry into trenches or confined spaces is 19.5% to 23.5%. This range is critical because oxygen concentrations below 19.5% can pose a risk of asphyxiation, while levels above 23.5% can lead to increased fire hazards, as higher concentrations of oxygen support combustion. Ensuring that oxygen levels are maintained within this specific range is an essential safety practice to protect workers from potential hazards associated with confined spaces and trenches. Monitoring this range allows for the assessment of a safe environment for workers, minimizing the risk of health emergencies related to oxygen deficiency or excess.