Osha’s Determination of Safe Oxygen Levels. Remember masks cause the levels to drop to less than 19.5%

https://www.osha.gov/SLTC/etools/shipyard/shiprepair/confinedspace/oxygendeficient.html Confined or Enclosed Spaces and Other Dangerous Atmospheres » Oxygen-Deficient or Oxygen-Enriched Atmospheres Oxygen-deficient atmospheres are the leading cause of confined space fatalities in the shipyard. While normal atmosphere contains between 20.8 and 21 percent oxygen, OSHA defines as oxygen deficient any atmosphere that contains less than 19.5 percent oxygen, and as oxygen enriched,Continue reading “Osha’s Determination of Safe Oxygen Levels. Remember masks cause the levels to drop to less than 19.5%”

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