25 Pa. Code § 89.64
Air pollution control measures shall be planned and employed as an integral part of the underground mining activities and shall meet the following requirements:
The provisions of this § 89.64 adopted July 30, 1982, 12 Pa.B. 2473, effective July 31, 1982, 12 Pa.B. 2382.
This section cited in 25 Pa. Code § 88.493 (relating to minimum environmental protection performance standards); and 25 Pa. Code § 89.13 (relating to air pollution control plan).