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CARBON dioxide is the fourth most common gas present in the earth's atmosphere, with an average ambient concentration (in fresh air) of about 350 ppm. Carbon dioxide is one of the most common ...
When I first read the preamble to the then new OSHA confined space standard, I was struck by an interesting paradox that appeared on page 4,487 of the Jan. 14, 1993, Federal Register. In one breath, ...
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