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   SECTION 2
Safe Dispensing of Propane
POTENTIAL EFFECTS OF OXYGEN-DEFICIENT ATMOSPHERES
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  White triangle inside a red trianle with exlamation point- standard Web alert icon The Effects of Oxygen Deficiency are Life Threatening White triangle inside a red trianle with exlamation point- standard Web alert icon  
(% bv volume)
 (At Atmospheric pressure)
19.05% 
 Minimum permissible oxygen level.
15-19%
Decreased ability to work strenuously. May impair coordination and may induce early symptoms in persons with coronary, pulmonary, or circulatory problems.
12-14%
Respiration increases in exertion, pulse up, impaired coordination, perception, judgment.
10-12%
Respiration further increases in rate and depth, poor judgment, lips blue.
08-10%
 Mental failure, fainting, unconsciousness, ashen face, blueness of lips, nausea, and vomiting.
06-08%
 8 minutes, 100% fatal; 6 minutes, 50% fatal; 4-5 minutes, recovery with treatment.
04-06%
Coma in 40 seconds, convulsions, respiration ceases, death.
 

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These values are approximate and vary as to the individual's state of health and his physical activities.

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Exposure to atmospheres containing 12% or less oxygen can bring about unconsciousness without warning, and so quickly that the individual cannot help or protect himself.
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