 | United States - 1983 - 1156 pages
...a record shall be kept of such examination. (b) Standards for air in work areas All active workings shall be ventilated by a current of air containing not less than 19.5 volume per centum of oxygen, not more than 0.5 volume per centum of carbon dioxide, and no harmful... | |
 | 1978 - 996 pages
...District Manager. §75.301 Air quality, quantity, and velocity. [STATUTORY PROVISIONS] All active workings shall be ventilated by a current of air containing not less than 19.5 volume per centum of oxygen, not more than 0.5 volume per centum of carbon dioxide, and no harmful... | |
 | 1987 - 758 pages
...6. 1982] § 75.301 Air quality, quantity, and velocity. [STATUTORY PROVISIONS] All active workings shall be ventilated by a current of air containing not less than 19.5 volume per centum of oxygen, not more than 0.5 volume per centum of carbon dioxide, and no harmful... | |
 | 1992 - 808 pages
...6, 1982] § 75.301 Air quality, quantity, and velocity. [STATUTORY PROVISIONS] All active workings shall be ventilated by a current of air containing not less than 19.5 volume per centum of oxygen, not more than 0.5 volume per centum of carbon dioxide, and no harmful... | |
 | 1995 - 758 pages
....40 percent (6) MAPP (methyl-acetylene-propylene-propodiene) — .30 percent (c) All active workings shall be ventilated by a current of air containing not less than 19,5 volume per centum of oxygen, not more than 0.5 volume per centum of carbon dioxide, and no harmful... | |
 | 1950 - 820 pages
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 | Victoria M. Trasko - 1954 - 344 pages
...and drilling and timbering. Provisions concerning ventilation require that "all active underground places in a mine shall be ventilated by a current of air containing not less than 19.5 percent of oxygen, not more than 0.5 percent of carbon dioxide, and no harmful quantities of other... | |
 | Indiana - 1955 - 1320 pages
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... the volume and velocity of the current of air shall be sufficient to dilute, render harmless, and to carry away, flammable... 
