Any leak from, spill from, or damage to a storage tank shall be reported to the local fire department and, if required by law, to the department of natural resources. If a tank is leaking or has been damaged, it shall be placed out of service until the leak has been repaired. A sign shall be placed prominently on the tank stating that the tank is out of service and that no flammable or combustible liquid shall be placed into the tank until required repairs have been completed.
Iowa Admin. Code r. 661-224.7