The interior of warehouses used for storage of blasting agents shall be kept clean and free from debris and empty containers. Spilled materials shall be cleaned up promptly and safely removed. Combustible materials, flammable liquids, corrosive acids, chlorates or nitrites shall not be stored in any warehouse used for blasting agents unless separated therefrom by a fire resistive separation of not less than one hour resistance. The provisions of this Section shall not prohibit the storage of blasting agents together with non-explosive blasting supplies.
Cal. Code Regs. Tit. 19, § 1572.40