C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER O—COAL MINE SAFETY AND HEALTH › PART 72—HEALTH STANDARDS FOR COAL MINES › Subpart D—Diesel Particulate Matter—Underground Areas of Underground Coal Mines

30 C.F.R. § 72.500

Emission limits for permissible diesel-powered equipment

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(a) [Reserved]

(b) Each piece of permissible diesel-powered equipment operated in an underground area of an underground coal mine must emit no more than 2.5 grams per hour of diesel particulate matter.

[91 FR 38283, June 25, 2026]