A. Oil, grease, and any similar flammable or combustible material shall be kept in a closed container, separate from other materials, so as to prevent any fire hazard to nearby buildings or mines. If oil, grease, or any similar flammable material is stored in a building, the building or room in which it is stored shall be of fireproof construction and well-ventilated.
B. Any oily rag, oily waste, or wastepaper shall be kept in a closed metal container until removed for disposal.
C. The area within 100 feet of each mine opening shall be kept free of flammable or combustible material; however, this provision shall not apply to the temporary storage of not more than a one-day’s supply of such material.
D. Every oxygen or acetylene bottle shall be (i) secured when not in use and (ii) stored with its cap in place in a rack constructed and designated for the storage of such bottles. Smoking shall be prohibited in any place where such materials are stored. Signs indicating that smoking is prohibited in the area shall be posted.