1. (a) Storage containers and appurtenances may not be constructed of copper, brass, zinc, or copper base alloys.
2. (b) A storage container and appurtenances used for the storage of fluid fertilizers containing phosphates or chlorides may not be constructed of aluminum or aluminum alloys.
3. (c) A storage container and appurtenances used for the storage of low (less than five (5)) pH fluid fertilizers may not be constructed of ferrous materials other than "316" or "317" stainless steel unless the materials are coated or treated with a protective substance that is adequate to inhibit corrosion.
4. (d) A storage container and appurtenances used for the storage of low pressure nitrogen solutions may not be constructed of mild steel, fiberglass, polyolefins, or plastic. However, this prohibition does not extend to nonpressure nitrogen solutions, commonly referred to as twenty-eight percent (28%), thirty percent (30%), or thirty-two percent (32%) nitrogen solutions. The prohibition against the use of mild steel does not extend to aqua ammonia.
5. (e) A storage container and appurtenances used for the storage of phosphoric acid may not be constructed of ferrous materials other than "316" or "317" stainless steel unless the container is lined with a suitable substance to prevent corrosion.

6. (f) A storage container and appurtenances used for the storage of fluid fertilizers containing potassium chloride (muriate of potash) may not be constructed of ferrous materials other than stainless steel unless the container and appurtenances are:

   1. (1) coated or treated with a protective substance that is adequate to inhibit corrosion; or
   2. (2) used for storage periods of not more than six (6) months each and are completely emptied between storage periods, cleaned, and inspected for leaks before being refilled for any subsequent period.

As added by P.L.98-2026, SEC.50.