Re: No Surprise
I think you may have fudged some numbers...
6,000ppm is no where near as lethal as you have suggested.
You need to get to 20,000ppm before the effects are apparent.
80,000 to 150,000ppm before there is a danger of death.
(1% is 10,000ppm)
(% in air)
2-3 Unnoticed at rest, but on exertion there may be marked shortness of breath
3 Breathing becomes noticeably deeper and more frequent at rest
3-5 Breathing rhythm accelerates. Repeated exposure provokes headaches
5 Breathing becomes extremely laboured, headaches, sweating and bounding pulse
7.5 Rapid breathing, increased heart rate, headaches, sweating, dizziness, shortness of breath, muscular weakness, loss of mental abilities, drowsiness, and ringing in the ears
8-15 Headache, vertigo, vomiting, loss of consciousness and possibly death if the patient is not immediately given oxygen
10 Respiratory distress develops rapidly with loss of consciousness in 10-15 minutes
15 Lethal concentration, exposure to levels above this are intolerable
25+ Convulsions occur and rapid loss of consciousness ensues after a few breaths. Death will occur if level is maintained.