6 Causes of Oxygen Depletion in a Confined Space

Are you familiar with the MADCOW acronym?  Here's a helpful review of the dangers of low oxygen levels as well as flammable and toxic gases present in Confined Spaces.  ow.ly/LvSiM

Microbiological Action (bacteria) 
Absorbtion (chemical processes)
Displacement by other gases (eg, Nitrogen, CO2)
Combustion (fires, generators, etc)
Oxidation (rusting)
Work (respiration: people and animals)

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