(a) The following apply to location, assembling, painting, and protection of bulk storage plants:

1. (1) No storage container shall exceed thirty thousand (30,000) water-gallon capacity, nor shall any anhydrous ammonia container be buried underground;
2. (2) Before any storage container may be installed, the location must be checked and approved by a representative of the Boiler Inspection Division; and
3. (3) Bulk storage containers should be equipped with approved type manifold safety relief valves.

(b)

1. (1) Containers used for the storage of anhydrous ammonia shall be located not less than fifty feet (50’) from the nearest important building or group of buildings or line of adjoining property which may be built on.
2. (2) They shall be located not less than fifty feet (50’) from the main line or passing track of a railroad or public highway.
3. (3) Waiver of this requirement may be made by the Chief Inspector of the Boiler Inspection Division providing no undue hazards exist, but in no case shall they be located closer than twenty-five feet (25’), and in no case shall they be located closer than four hundred feet (400’) from any school, hospital, church, or other place of public assembly.

(d)

1. (1) Storage containers shall be provided with substantial reinforced concrete footings and foundations, or structural steel supports mounted on reinforced concrete foundations.
2. (2) In either case, the reinforced concrete foundations must be below the established frost line, and in no case less than twenty-four inches (24”) below the ground level, and shall be of sufficient width and thickness to support adequately the total weight of the container and contents.
3. (3) Every container shall be mounted on saddles in such a manner as to permit expansion and contraction, and shall be so supported to prevent the concentration of excessive loads on the supporting portion of the shell.
4. (4) Suitable means of preventing corrosion shall be provided on that portion of the container in contact with the foundation or saddles.
5. (5) There shall be a resilient cushion of road expansion, or other suitable material, with a thickness of not less than one-half inch (1/2”) placed between the saddle and tank to allow for minor imperfections in pier surface to protect the tank from corrosion and to act as a lubricant in tank expansion.
6. (6) That portion of the tank surface that is to be in contact with the pier or saddle shall be painted with at least two (2) coats of approved primer before installing on the supports.
7. (7) Blueprints or approved-type footings and foundations may be obtained from the Division of Labor upon request.

(e)

1. (1)

   1. (A) Containers shall be equipped with the necessary fittings and piping as outlined herein.
   2. (B) Exception. Installation of fifteen percent (15%) outage gauge not required.
2. (2) The safety relief valve shall discharge upward and away from the container.
3. (3) Loose-fitting rain caps shall be used.

4. (4) If riser pipes are used they:

   1. (A) Shall not be attached to the shell by the use of clip angles or brackets; or
   2. (B) May be supported by the use of guy wires.
5. (5) Any method of attaching risers to relief valves that does not induce any undue stress to the relief valve itself will be acceptable to the Division of Labor.
6. (6) Size of discharge lines from safety relief valves shall not be smaller than the normal size of the relief valve outlet connection.
7. (7) Suitable provision shall be made for draining condensate which may accumulate in the discharge pipe.
8. (8) The vapor return valve on all storage containers exceeding one thousand two hundred (1,200) water-gallon capacity shall be not less than one and one-fourth inches (1 1/4") standard pipe size.
9. (9) Each container shall be effectively grounded.
10. (10) Stop valves, where required, shall be installed as near the outlet opening in the container as possible.
11. (11) Piping from the excess flow check valves shall not be reduced in size.
12. (12) Any portion of the piping between the tank and the pump inlet which at any time may be closed at both ends shall be provided with a relief valve to prevent excessive pressure developing in the hose or piping.

(f)

1. (1) Containers shall be painted at the time of installation with a light-colored, heat-reflective paint, equivalent to white or aluminum paint, and shall have the words “DANGER - AMMONIA” or “CAUTION - AMMONIA” painted on both sides and heads in red letters at least six inches (6”) in height.
2. (2) The owner’s name and address and owner’s number shall be painted on at least one (1) side of the container in letters not less than two inches (2”) in height.
3. (3) Containers shall be protected or enclosed by a steel or wire fence, or provisions shall be made for locking the service line valves at the container.
4. (4) Where a steel or wire fence is used, there shall be two (2) means of exit, located preferably at the front and rear of the fence.
5. (5) Such exits shall be of a size that will easily and quickly admit one (1) or more persons.
6. (6) The premises around the container shall be maintained in good order.
7. (7) Combustible material of any type shall not be allowed to accumulate near the container.

(g)

1. (1) Provisions shall be made at bulk storage tanks to have the following articles available for use and protection of employees:

   1. (A) Goggles;
   2. (B) Rubber gloves; and
   3. (C) Rubberized aprons or slickers.
2. (2) There shall also be available an ample supply of clean water located so that in the event leaks should occur in the piping or containers, the water facilities will not be rendered inoperative.

(h)

1. (1) Railway tank cars shall not be considered as bulk storage, and the transferring of anhydrous ammonia from railway tank cars to truck or trailer units is prohibited.
2. (2) Trailer units shall be filled at designated bulk storage plants constructed and equipped as outlined herein.