15-28-300 Storage requirements.

   Quantities of ammonium nitrate or ammonium nitrate fertilizer, having no organic coating, in the form of crystals, flakes, grains or pills including fertilizer grade, dynamite grade, nitrous oxide grade and technical grade ammonium and ammonium nitrate phosphate (containing 60 percent or more ammonium nitrate by weight) or more than 50 tons total weight shall be stored only in Type IA, IB, IC buildings.

   Type IIIA, IIIB and IIIC may be used if such building is equipped with a complete system of automatic sprinklers as directed in Chapter 15-16 this Code.

   The maximum height and areas of such buildings shall be in accordance with Chapter 13-48 for moderate hazard storage buildings. Quantities in excess of 2,500 tons shall be stored only in buildings of Type IA, IB, IC or II construction and such buildings shall also have a complete installation of automatic sprinklers. All such buildings shall have ventilation in accordance with the requirements of Section 15-28-260. The floor of such buildings shall be constructed of noncombustible materials having fire-resistive rating required for that type building.

   There shall be no connections to the city sewer system nor shall there be allowed any drain, trap, basement pit into which any molten ammonium nitrate could flow and be confined in the event of a fire. The storage of ammonium nitrate, coated or mixed with organic anticaking materials except blasting agents permitted in Chapter 15-20, shall not be permitted.

(Prior code §  92-25)

15-28-310 Arrangement of storage.

   The storage and handling of ammonium nitrate shall comply with the following requirements:

   (1)   Each storage pile of bags or other authorized packages and containers of such materials shall not exceed 15 feet in height, 20 feet in width and 50 feet in length. Such pile units shall be separated by a clear space of not less than 36 inches in width from the base to the top of the piles, serving as cross aisles. At least one service or main aisle in the storage area shall be not less than four feet in width. A clearance of not less than 30 inches shall be maintained from building walls and partitions and of not less than 36 inches from ceilings or roof structural members with a minimum of 18 inches from sprinkler deflectors.

   (2)   Ammonium nitrate storage areas shall be separated by a space of 30 feet or by a tight noncombustible partition having a fire-resistive rating of not less than one hour, from the storage of organic chemicals, corrosive liquids, compressed gases, flammable liquids and combustible materials or other contaminating substances such as sulphur, coal, flour and metallic power such as zinc, copper and magnesium where storage of such materials is permitted with ammonium nitrate.

   (3)   The storage of ammonium nitrate, coated or mixed with organic anticaking materials except blasting agents permitted in Chapter 15-20 shall not be permitted in the city.

(Prior code §  92-26)

15-28-320 Fire prevention requirements.

   No vehicles shall be used or stored inside a building used for ammonium nitrate storage. Regular removal of all trash and debris shall be followed. Electric light bulbs shall have guards to protect against mechanical injury.

(Prior code §  92-27)

15-28-330 Open flames prohibited.

   No open flames, no open flame lights or smoking shall be permitted inside a building used to store ammonium nitrate.

(Prior code §  92-28)