272 Neb. Admin. Code, ch. 9, § 013
Explosive materials in excess of 300,000 pounds or blasting caps in excess of 20 million shall not be stored in one storage facility. Blasting caps shall not be stored with other explosive materials in type 1, 2, 3 or 5 storage facilities. A type 4 storage facility meets the requirements for storage of blasting caps that do not mass detonate. A "cap box", that meets the requirements of Chapter 9, may be attached to the outside of a type 1, 2, or 3 storage magazine by welding, riveting, or bolting. Rivets or bolts must be on the inside of the box, not visible from the outside, and covered with non-sparking material. The total explosive material located within the magazine and cap box shall be used to determine the table of distances.
272 Neb. Admin. Code, ch. 9, § 013