25 Pa. Code § 207.302
Current through Register Vol. 54, No. 41, October 12, 2024
The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:
Outside air-Air moving through the mined-out passageways after entering them through the main or accessory portals by mechanical or natural forces.
Pure air-Air containing not less than 19.5% oxygen, not more than 0.5% carbon dioxide and no harmful quantities of other noxious or poisonous gases, dust, soot or particulates.
Safety container-A container not over 5 gallons capacity, having a spring closing lid and spout cover.
25 Pa. Code § 207.302