What is the lowest safe permissible concentration of oxygen according to OSHA regulations?

What is the lowest safe permissible concentration of oxygen according to OSHA regulations?

• A. 21%
• B. 20%
• C. 19.5%
• D. 18%

Answer: (C)

The lowest safe permissible concentration of oxygen according to OSHA regulations is 19.5%. This threshold is determined to ensure that work environments are safe for individuals, as oxygen levels below this percentage indicate a potential oxygen-deficient atmosphere which can pose serious health risks, including unconsciousness or even death due to asphyxiation. OSHA has established that normal atmospheric oxygen concentration is approximately 20.9%. When oxygen levels drop to 19.5%, it becomes critical to provide suitable safety measures, such as ventilation or personal protective equipment, to maintain a safe working environment. Levels below this threshold can impair physical and mental performance, making it essential for employers to monitor oxygen concentrations in the workplace to prevent hazardous conditions.

The lowest safe permissible concentration of oxygen according to OSHA regulations is 19.5%. This threshold is determined to ensure that work environments are safe for individuals, as oxygen levels below this percentage indicate a potential oxygen-deficient atmosphere which can pose serious health risks, including unconsciousness or even death due to asphyxiation.

OSHA has established that normal atmospheric oxygen concentration is approximately 20.9%. When oxygen levels drop to 19.5%, it becomes critical to provide suitable safety measures, such as ventilation or personal protective equipment, to maintain a safe working environment. Levels below this threshold can impair physical and mental performance, making it essential for employers to monitor oxygen concentrations in the workplace to prevent hazardous conditions.