Photochemical smog
Photochemical smog
Photochemical smog
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Standards or Guidelines<br />
The OSHA standard for workers is no more than 50 ppm for 1 hour of<br />
exposure. NIOSH recommends no more than 35 ppm for 1 hour. The U.S.<br />
National Ambient Air Quality Standards for CO (established in 1985) are 9 ppm<br />
for 8 hours and 35 ppm for 1 hour. The Consumer Product Safety<br />
Commission recommends levels not to exceed 15 ppm for 1 hour or 25 ppm<br />
for 8 hours.
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