(A) 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 Director of Public Works, that the wastes can harm either the sewers, sewage treatment process, or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property, or constitute a nuisance. In forming his or her opinion as to the acceptability of these wastes, the Director of Public Works will give consideration to the 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, and other pertinent factors.
(B) The substances prohibited are:
(1) Any liquid or vapor having a temperature higher than 150°F (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 which may solidify or become viscous at temperatures between 32°F and 150°F (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 three-fourths horsepower (seventy-six hundredths horsepower metric) or greater shall be subject to the review and approval of the Director of Public Works;
(4) Any waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions, whether neutralized or not;
(5) Any water or wastes containing iron, chromium, copper, zinc, and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to the degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the Director of Public Works for the materials;
(6) Any waters or wastes containing phenols or other taste- or odor-producing substances, in the concentrations exceeding limits which may be established by the Director of Public Works as necessary, after treatment of the composite sewage, to meet the requirements of state, federal, or other public agencies of jurisdiction for the discharge to the receiving waters;
(7) Any radioactive wastes or isotopes of the half-life or concentration as may exceed limits established by the Director of Public Works in compliance with applicable state or federal regulations;
(8) Any waters or wastes having a pH in excess of nine and one-half;
(9) Materials which exert or cause:
(a) Unusual concentrations of inert suspended solids (such as, but not limited to, Fuller’s earth, lime slurries, and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride or 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 the quantities as to constitute a significant load on the sewage treatment works; and/or
(d) Unusual volume of flow or concentration of wastes constituting “slugs,” as defined herein.
(10) Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to the degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(1973 Code, § 3-241) (Ord. 544, passed 11-10-1983) Penalty, see § 52.999