Workers need to enter a storage tank to perform maintenance. The tank has been emptied and ventilated. What is the minimum oxygen level required before entry without supplied air respiratory protection?
Correct Answer
A) 19.5%
OSHA requires a minimum oxygen concentration of 19.5% for safe entry into confined spaces without supplied air respiratory protection. Normal atmospheric oxygen is approximately 20.9%.
Why This Is the Correct Answer
OSHA requires a minimum oxygen concentration of 19.5% for safe entry into confined spaces without supplied air respiratory protection. Normal atmospheric oxygen is approximately 20.9%.
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