(1) Telephone notice. Any industrial user or employee thereof becoming aware of a discharge which:
(a) Could cause interference or pass through, including any slug load; or
(b) Violates sections 6.501 to 6.596 of this code, shall report such discharge immediately by telephone to the city manager. Prompt notification of such discharges will allow the city to take necessary precautions to minimize hazards and to prevent damage to the receiving waters, thereby avoiding or minimizing discharge violations and fines from state and federal regulatory agencies and the city. The notification shall include the location of the discharge, type, concentration and volume of pollutant discharged and corrective actions proposed and/or taken.
(2) Written notice. Within five days following such a discharge, the industrial user shall submit to the city manager a detailed written report describing the cause and location of the discharge, the type, concentration and volume of pollutant discharged, and any hazards which may be posed to life or property and the measures taken or to be taken to prevent similar future occurrences.
(3) Advance notice. An industrial user shall promptly notify the city manager in advance of any substantial change in the volume or character of pollutants in its discharge, including hazardous wastes for which the industrial user has provided initial notification under section 6.536 of this code.
(4) Notice to employees. Each industrial user subject to section 6.551 of this code shall permanently post a notice on its bulletin board or other prominent place advising employees whom to call in the event of a discharge covered by subsection (1) of this section. Employers shall ensure that all employees who may cause or suffer such a discharge to occur or who are likely to detect such discharge are advised of the emergency notification procedure.