(a) If any waters or wastes are discharged or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in section 78-96 and which, in the judgment of the city, may have a deleterious effect upon the sewage works, processes, equipment, receiving waters or which otherwise create a hazard to life or constitute a public nuisance, the city may:

(b) If the city permits the pretreatment or equalization of waste flows, the design and installation of the facilities and equipment shall be subject to the review and approval of the city and shall be subject to the requirements of all applicable codes, ordinances and laws. In addition, any contributing industry as defined by 40 CFR 403 shall comply with 40 CFR 403, the Clean Water Act, and any other regulation as shall from time to time be established by the Environmental Protection Agency or other appropriate regulating governmental agency.

(c) Grease, oil and sand interceptors shall be provided on facilities when, in the opinion of the city, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts or containing any flammable wastes, sand or other harmful ingredients, except such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall conform to chapter 8 of the plumbing code adopted in section 82-146 and shall be approved by the city. All interceptors shall be located as to be readily and easily accessible for cleaning and inspection.

(d) Where preliminary treatment, flow-equalizing facilities or grease, oil and sand interceptors are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.

(e) Each user shall provide protection from accidental discharge of prohibited materials or other wastes regulated by this division. Facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the owner's or operator's cost and expense. Detailed plans showing facilities and operating procedures to provide this protection shall be submitted to the city for review and shall be approved by the city before construction of the facility. No user who commences contribution to the POTW after the effective date of the ordinance from which this section is derived shall be permitted to introduce pollutants into the system until accidental discharge procedures have been approved by the city. Review and approval of such plans and operating procedures shall not relieve the industrial user from the responsibility to modify the user's facility as necessary to meet the requirements of this division.

(f) If an accidental discharge occurs, the facility responsible for such discharge shall immediately notify the city so that corrective action may be taken to protect the treatment system. In addition, a written report detailing the date, time and cause of the accidental discharge; the quantity and characteristics of the discharge; and corrective action taken to prevent future discharges shall be filed with the city by the responsible industrial or commercial facility within five days of the occurrence of the noncomplying discharge. Such notification shall not relieve the user of any expense, loss, damage or other liability which may be incurred as a result of damage to the POTW, fish kills or other damage to person or property nor shall such notification relieve the user of any fines, civil penalties or other liability which may be imposed by this division or other applicable law.

(g) Upon the promulgation of the national categorical pretreatment standards for a particular industrial subcategory, the national standard, if more stringent than limitations imposed under this division for sources in that subcategory, shall immediately supersede the limitations imposed under this division. The city shall notify all affected users of the applicable reporting requirements under 40 CFR 403.12.