[Code of Federal Regulations] [Title 30, Volume 1] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 30CFR57.4130] [Page 334] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 57_SAFETY AND HEALTH STANDARDS_UNDERGROUND METAL AND NONMETAL MINES --Table of Contents Subpart C_Fire Prevention and Control Sec. 57.4130 Surface electric substations and liquid storage facilities. The requirements of this standard apply to surface areas only. (a) If a hazard to persons could be created, no combustible materials shall be stored or allowed to accumulate within 25 feet of the following: (1) Electric substations. (2) Unburied, flammable or combustible liquid storage tanks. (3) Any group of containers used for storage of more than 60 gallons of flammable or combustible liquids. (b) The area within the 25-foot perimeter shall be kept free of dry vegetation.