Cal. Code Regs. tit. 19 § 1584.2
The storage of plosophoric compounds in commercial warehouses shall not exceed 50,000 lbs. of materials classified as an oxidizing agent. The storage of all hazardous substances shall comply with the nationally recognized standards as published by the National Fire Protection Association. Unmixed plosophoric compounds shall be stored so that the individual components are separated by a space of at least 50 feet, or they shall be separated by a wall of not less than one-hour fire-resistive construction, with any opening protected with an approved one-hour fire-resistive door. When the plosophoric compounds are separated by the minimum 50 feet, the intervening space may be utilized for the storage of other materials which under no circumstances are incompatible with any of the plosophoric compounds. Where any material is incompatible with any plosophoric compound such materials shall be separated from the plosophoric compound by a wall of not less than one-hour fire-resistive construction, with any opening protected by an approved one-hour fire-resistive door.
Notwithstanding any provisions contained within the National Fire Protection Association standards referenced herein, the storage of all plosophoric compounds shall be secured against loss or theft.
Cal. Code Regs. Tit. 19, § 1584.2