CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER K—METAL AND NONMETAL MINE SAFETY AND HEALTH (parts 56 to 58) > PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES > SUBPART C—Fire Prevention and Control (§56.4000 to §56.4604) > 56.4531—Flammable or combustible liquid storage buildings or rooms.

56.4531—Flammable or combustible liquid storage buildings or rooms.

(a) Storage buildings or storage rooms in which flammable or combustible liquids, including grease, are stored and that are within 100 feet of any person's work station shall be ventilated with a sufficient volume of air to prevent the accumulation of flammable vapors.
(b) In addition, the buildings or rooms shall be—
(1) Constructed to meet a fire resistance rating of at least one hour; or
(2) Equipped with an automatic fire suppression system; or
(3) Equipped with an early warning fire detection device that will alert any person who could be endangered by a fire, provided that no person's work station is in the building.
(c) Flammable or combustible liquids in use for day-to-day maintenance and operational activities are not considered in storage under this standard.