§ 33.31. Test space.
84 words·~1 min read·
/us/cfr/t30/s§ 33.31·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)Drilling tests shall be conducted in a test space formed by two curtains suspended across a mine opening in such a manner that the volume of the test space shall be approximately 2,000 cubic feet.
(b)No mechanical ventilation shall be provided in the test space during a drilling test, except such air movement as may be induced by operation of drilling- or dust-collecting equipment.
(c)All parts of a unit or system shall be within the test space during a drilling test.