25 Pa. Code § 207.302
Current through Register Vol. 54, No.43, October 26, 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