(A) Prohibited discharges. No person shall discharge or cause to be discharged any of the following described waters or wastes into any public sewers:
(1) Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas;
(2) Any waters or wastes containing toxic or poisonous solids, liquids, or gases in sufficient quantity, either singly or by interaction with other wastes, to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of the sewage treatment plant;
(3) Any waters or wastes having a pH lower than 5.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment, or personnel of the sewage works; or
(4) Solid or viscous substances in quantities or of a size capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewage works, such as but not limited to ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, paper dishes, cups, and milk containers, either whole or ground by garbage grinders.
(B) Restricted discharges. No person shall discharge or cause to be discharged the following described substances, materials, waters, or wastes if it appears likely in the opinion of the superintendent that those wastes can harm either the sewers, sewage treatment process, or sewage treatment equipment, have any adverse effect on the receiving stream, or can otherwise endanger life, limb, or public property or constitute a nuisance. In forming his or her opinion as to the acceptability of these wastes, the superintendent shall give consideration to such factors as the quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors. The following substances are prohibited:
(1) Any liquid or vapor having a temperature higher than 150°F or 65°C;
(2) Any water or waste containing fats, wax, grease, or oils, whether emulsified or not, in excess of 100 mg/l or containing substances that may solidify or become viscous at temperatures between 32°F and 150°F or between 0°C and 65°C;
(3) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of three-fourths horsepower (0.76 hp metric) or greater shall be subject to review and approval of the superintendent;
(4) Any waters or wastes containing strong acid iron pickling wastes or concentrated plating solutions, whether neutralized or not;
(5) Any waters or wastes containing iron, chromium, copper, zinc, or similar objectionable or toxic substances or wastes exerting an excessive chlorine requirement to such a degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the superintendent for these materials;
(6) Any waters or wastes containing phenols or other taste- or odor-producing substances in concentrations exceeding limits that 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 having jurisdiction over the discharge into the receiving waters;
(7) Any radioactive wastes or isotopes of a half-life or concentration as may exceed limits established by the superintendent in compliance with applicable state or federal regulations;
(8) Any waters or wastes having a pH in excess of 9.5;
(9) Materials that exert or cause:
(a) 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);
(b) Excessive discoloration (such as but not limited to dye wastes and vegetable tanning solutions);
(c) Unusual BOD, chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works; or
(d) Unusual volume of flow or concentration of wastes constituting slugs.
(10) Waters or wastes containing substances that are not amenable to treatment or reduction by the sewage treatment processes employed or are amenable to treatment only to such a degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharges into the receiving waters.
(1985 Code, § 350-30) (Ord. 81-1, passed 5-18-1981) Penalty, see § 10.99