45.1-161.229 - Air quality.
§ 45.1-161.229. Air quality.
A. All active workings shall be ventilated by a current of air containing notless than 19.5 volume percent of oxygen and no harmful quantities of othernoxious or poisonous gases.
B. The volume and velocity of the current of air in all active workings shallbe sufficient to dilute, render harmless and carry away flammable, explosive,noxious and harmful gases and dust, smoke, and explosive fumes.
(Code 1950, § 45-60.3; 1954, c. 191; 1966, c. 594, § 45.1-63; 1968, c. 310;1993, c. 442; 1994, c. 28; 1996, c. 774; 2005, c. 3.)