(A) No person shall discharge or cause to be discharged the following described substances, materials, waters or wastes (hereinafter prohibited substances), or additional waste, if it appears likely, in the opinion of the city, that such 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.
(B) In forming its opinion as to the acceptability of these wastes, the city will 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 maximum limits established by regulatory agencies.
(C) The substances prohibited are:
(1) Any liquid or vapor having a temperature higher than 150°F (65°C);
(2) Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas;
(3) 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;
(4) 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 and personnel of the sewage works;
(5) Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow of 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, underground garbage, paunch manure, entrails and paper dishes, cups, milk containers and the like, either whole or ground by garbage grinders;
(6) Any waters or wastes containing oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures 32 and 150°F (0 and 65°C);
(7) Any garbage that has not been properly shredded; the installation and operation of any garbage grinder equipped with a motor of greater than three-fourths horsepower (0.76 hp metric) shall be subject to the review and approval of the Superintendent;
(8) Any wastes or waters having a pH in excess of 9.5;
(9) Any mercury or any of its compounds in excess of 0.0005mg/l as Hg at any time except as permitted by the city in compliance with applicable state and federal regulations;
(10) Any waters or wastes containing strong acid, iron pickling wastes or concentration plating solution whether neutralized or not;
(11) Any waters or wastes containing iron, chromium, copper, zinc or similar objectionable or toxic substance; 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 city, EPA or other regulatory agency for such materials;
(12) Any waters or wastes containing phenols or other taste or odor-producing substances, in such concentrations exceeding limits which may be established by the city, EPA or other regulatory agency as necessary after treatment, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the city, EPA or other regulatory agency for such materials;
(13) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the city in compliance with applicable state or federal regulations;
(14) Any cyanide in excess of 0.05 mg/l at any time, except as permitted by the city in compliance with applicable state and federal regulations;
(15) Material that 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 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 concentrations of wastes constituting “slugs” as defined herein.
(16) 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 cannot meet the requirements of agencies having jurisdiction over discharge to the receiving waters.
(Prior Code, § 18-9-1) Penalty, see § 52.999