272 Neb. Admin. Code, ch. 9, § 015
Storage facilities shall be kept clean, dry, and free of grit, paper, empty packages and containers, and rubbish. Floors shall be regularly swept. Brooms and other utensils used in the cleaning and maintenance of storage facilities shall have no spark-producing metal parts. Floors stained by leakage from explosive materials shall be cleaned according to instructions of the manufacturer. When any explosive material has deteriorated to the extent that it is in a dangerous condition, or if a liquid leaks therefrom, it shall be destroyed in accordance with the instructions of its manufacturer. The area surrounding storage facilities shall be kept clear of rubbish, brush, dry grass, or trees for not less than 25 feet in all directions. Any other combustible materials shall be kept a distance of not less than 50 feet from outdoor storage facilities. The Nebraska State Patrol shall permit trees to grow within 25 feet of a magazine for barricade protection purposes provided that such trees are living and at least 10-feet high.
272 Neb. Admin. Code, ch. 9, § 015