The city is hereby authorized, by and through its Board of Public Works and Safety, to prohibit dumping of wastes into the city sewage system which, in its discretion, are deemed harmful to the operation of the sewage works of the city, or to require methods effecting pretreatment of wastes to reduce the characteristics of the wastes satisfactory to the city, or to pay the appropriate surcharge, under other provisions of this chapter, if such waste is accepted by the utility. Except as hereinafter provided, no persons shall discharge or cause to be discharged any of the following described waters or wastes to any public sewer:
(A) Any liquid or vapor having a temperature higher than 150° F. (65° C.).
(B) Any water or waste containing fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/l or containing any substance which may solidify or become viscous at temperatures between 32° and 150° F. (0 and 65° C.).
(C) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor greater than 1/4 horsepower (0.75 hp metric) shall be subject to the review and approval of the Superintendent.
(D) Any waters or wastes containing iron, chromium, copper, zinc, and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the Superintendent for such materials.
(E) Any waters or wastes containing phenols or other taste or odor-producing substances, in such concentrations exceeding limits which may be established by the Superintendent as necessary, after treatment of the composite sewage, to meet the requirements of the state, federal or other public agencies of jurisdiction for such discharge to the receiving waters.
(F) Any radioactive wastes or isotopes of such halflife or concentration as may exceed limits established by the Superintendent in compliance with applicable state or federal regulations.
(G) Any waters or wastes having a pH in excess of 9.0 or lower than 6.0.
(H) Materials which exert or cause:
(1) Unusual concentrations of inert, suspended solids (such as but not limited to Fullers earth, lime slurries, and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride and sodium sulfate).
(2) Excessive discoloration (such as, but not limited to dye wastes and vegetable tanning solutions).
(3) Unusual BOD, chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works.
(4) Unusual volume of flow or concentration of wastes constituting “slugs” as defined herein.
(5) Any liquids, solids or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction to cause fire or explosion or be injurious in any other way to public safety or to the operation of the POTW.
(6) Any wastewater containing toxic pollutants in sufficient quantity, either alone or by interaction to injure or interfere with any wastewater treatment process, or constitute a hazard to humans or animals.
(7) Any noxious or malodorous liquids, gases, or solids which either alone or by interaction are capable of creating a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for their maintenance and repair.
(I) Waters or wastes containing substances which are not amendable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent can not meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(J) Any wastes, which cause, threaten to cause, or are capable of causing either alone or by interaction with other substances, the wastewater treatment plant’s effluent or any other product of the treatment process, residues, sludges, or scum, to be unsuitable for reclamation, disposal, or reuse or to interfere with the reclamation process, or to fail to meet any of the limitations set by any federal or state agency or the terms of the city’s NPDES permit.
(‘85 Code, § 9.05(c)) Penalty, see § 52.999