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Subchapter 7. General Industry Safety Orders
Group 18. Explosives and Pyrotechnics
Article 122. Ammonium Nitrate Storage

§5360. Storage.

(a) Ammonium nitrate shall be in a separate building or shall be separated by fire walls constructed to be of not less than one hour fire-resistance rating from storage of organic chemicals, acids or other corrosive materials, materials that may require blasting during processing or handling, compressed flammable gases, flammable and combustible materials or other contaminating substances. Walls referred to in this Section need extend only to the underside of the roof. In lieu of separation walls, ammonium nitrate may be separated from these materials by a space of at least 30 feet and if necessary, sills or curbs shall be provided to prevent mixing.

(b) Flammable and combustible liquids such as gasoline, kerosene, solvents and light fuel oils shall not be stored on the premises except when such storage conforms to Articles 135 and 141 of these orders and when walls and sills or curbs are provided in accordance with subsection (a) of this Section.

(c) Sulfur and finely divided metals shall not be stored in the same building with ammonium nitrate except when such storage conforms to the requirements of subsection (a) of this Section.

(d) Explosive materials shall not be stored in the same building with ammonium nitrate except on the premises of makers, distributors and user-compounders of explosive materials.

(e) Quantities of 2,500 tons or more of bagged ammonium nitrate shall not be stored in buildings or structures unless equipped with automatic sprinkler systems. Sprinkler protection shall be required for the storage of less than 2,500 tons of ammonium nitrate where location of the building or the presence of other stored materials presents a fire or detonation hazard. Sprinkler systems shall be of approved type and installed in accordance with Article 159.

(f) Suitable fire control devices complying with Articles 157 and/or 158 shall be provided throughout the warehouse and in the loading dock areas.

(g) Where required by local fire authorities or the State Fire Marshal, lightning strike protection shall be provided.

NOTE

Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.

HISTORY

1. Amendment filed 7-16-76; effective thirtieth day thereafter (Register 76, No. 29).

2. Amendment of subsection (b) filed 11-18-76; effective thirtieth day thereafter (Register 76, No. 47).

3. New subsection (f)(1) filed 9-8-81; effective thirtieth day thereafter (Register 81, No. 37).

4. Editorial correction of subsections (f)(1) and (g) filed 11-9-81; effective thirtieth day thereafter (Register 81, No. 45).

5. Amendment of section and Note filed 7-11-2003; operative 8-10-2003 (Register 2003, No. 28).

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