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Asphyxiation is an extreme hazard when working in enclosed spaces. Be sure you are trained in confined space entry before working in sewers, storage tanks etc. where gases such as methane may displace oxygen from the atmosphere.
The normal composition of air is:
|Name||Formula||% by volume|
According to the Canadian Centre for Occupational Health and Safety (CCOHS) the health effects of asphyxiation are:
|Symptoms or effects|
|16 to 12||Breathing and pulse rate increased, muscular coordination slightly disturbed|
|14 to 10||Emotional upset, abnormal fatigue, disturbed respiration|
|10 to 6||Nausea and vomiting, collapse or loss of consciousness|
|Below 6||Convulsive movements, possible respiratory collapse and death|
Examples of asphyxiating gases are nitrogen (N2), helium (He), neon (Ne), argon (Ar), methane (CH4), propane (CH3CH2CH3), and carbon dioxide (CO2).
Remember also that simple air-purifying respirators or dust masks do not protect you from asphyxiation in an oxygen-deficient atmosphere. See the first link below for accidents involving supplied air respirators!
This confined space poster is just one of dozens of Simpsons-themed safety wall posters available at Safety Emporium.
Disclaimer: The information contained herein is believed to be true and accurate, however ILPI makes no guarantees concerning the veracity of any statement. Use of any information on this page is at the reader's own risk. ILPI strongly encourages the reader to consult the appropriate local, state and federal agencies concerning the matters discussed herein.