CustomsMobile Pro beta now open!
Apply for a FREE beta account. Spaces are limited so apply today.
Air that has passed by or through unsealed abandoned or unsealed inactive areas and contains 0.25 percent or more methane shall—
(a) Be coursed directly to a return airway;
(b) Be tested daily for methane by a competent person; and
(c) Not be used to ventilate work places.