(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 Superintendent 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 an opinion as to the acceptability of these wastes, the Superintendent will give consideration to factors such 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.
(B) The substances restricted are:
(1) High temperature. Any liquid or vapor having a temperature higher than 65°C (150°F);
(2) Fat, oil, grease. Any water or waste containing fats, wax, grease or oils, whether emulsified or not, in excess of 150 mg/l;
(3) Viscous substances. Water or wastes containing substances which may solidify or become viscous at temperatures between 32°F and 150°F (0° to 65°C);
(4) Acids. Any waters or wastes containing strong acid iron pickling wastes, or concentrated plating solution whether neutralized or not;
(5) Toxic or objectionable wastes. Any waters or wastes containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to deteriorate any public sewer, 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, including, but not limited to, the following list in average or maximum concentrations established by categorical pretreatment standards, or an industrial waste discharge permit: arsenic, cadmium, chromium, copper, cyanide, lead, mercury, molybdenum, nickel, selenium, silver, zinc.
(6) Odor or taste. Any waters or wastes containing phenols or other taste-producing or odor-producing substances which constitute a nuisance or hazard to the structures, equipment or personnel of the sewage works, or which prevent sewage treatment which meets the requirements of the state and federal government and any other public agency with proper authority to regulate the discharge from the sewage treatment plant;
(7) Unusual wastes. Materials which 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 B.O.D., chemical oxygen demand or chlorine requirements in quantities as to constitute a significant load on the sewage treatment works; and
(d) Unusual volume of flow or concentration of wastes constituting “slugs” as defined herein.
(8) Damaging substances. Any waters, wastes, materials or substances which react with water or wastes in the sewer system to release noxious gases, develop color of undesirable intensity, form suspended solids in objectionable concentration or create any other condition deleterious to structures and treatment processes.
(9) Maximum allowable industrial loading (MAIL) limits. The maximum allowable industrial loading (MAIL) limits for the following discharges shall be:
(10) pH of discharge. Any water or wastes having a pH lower than 5.0 or greater than 10 having any other corrosive property capable of causing damage or hazard to the public sewer or structures, equipment, and personnel of the water pollution control facilities, or operation thereof.
(C) All discharges shall be in compliance with prohibited discharge and waste limitation requirements of the NPDES permit and any other prohibitions or limitations mandated by state or federal regulations.
(1999 Code, § 97.04) (Ord. 2396, passed 12-18-2008; Ord. 2443, passed 4-26-2011; Ord. 2542, passed 9-27-2016) Penalty, see §
52.999