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What is the minimum oxygen level for a confined space?
minimum oxygen level 19.5% 23.5%
Questioner：Ryan Gonzalez 2018-04-06 10:05:01
The most authoritative answer in 2024
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Zoe Brown——Studied at the University of British Columbia, Lives in Vancouver, Canada.
As a subject matter expert in occupational safety and health, I can provide you with information on the minimum oxygen levels for a confined space.
In the United States, the Occupational Safety and Health Administration (OSHA) sets the standard for confined spaces. According to OSHA, the minimum oxygen level in a confined space must be 19.5%. However, it's important to note that a level of 23.5% is considered optimal for most workers. Levels below 19.5% can be dangerous and require the use of a respirator. Additionally, the atmosphere in a confined space should be tested for other contaminants that could be harmful.
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Amelia Hernandez——Studied at the University of Vienna, Lives in Vienna, Austria.
Confined Space Entry PolicyParameter Permit Required Confined Space Oxygen<19.5% or >23.5%Flammability>10% lower flammable limit (LFL)Toxicity>50% permissible exposure limit (PEL) or threshold limit value (TLV)ExamplesManhole entry points; WWTP digester tanksread more >>
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