(A) No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, uncontaminated cooling water, or unpolluted industrial process waters to any sanitary sewer.
(B) Stormwater and all other unpolluted drainage shall be discharged to sewers specifically designated as storm sewers, or to a natural outlet approved by the Approving Authority. Industrial cooling water or unpolluted process waters may be discharged, on approval of the Approving Authority, to a storm sewer or natural outlet.
(C) No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
(1) 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, including, but not limited to, cyanides in excess of 2 mg/l as CN in the wastes as discharged to the public sewer.
(2) Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.
(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, and personnel of the sewage works.
(4) Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the sewage words such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, underground garbage, whole blood, paunch manure, hair and fleshing, entrails, and paper dishes, cups, milk containers, and the like, either whole or ground by garbage grinders.
(D) 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 Approving Authority, that they 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 its opinion as to the acceptability of those waters, the Approving Authority 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 other pertinent factors. The substances prohibited are:
(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° and 150°F (0° 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 ¾ horsepower (0.76) hp metric or greater shall be subject to the review and approval of the Approving Authority.
(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 acid 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 Approving Authority for such materials.
(6) Any waters or wastes containing phenols or other taste- or odor-producing substances, in such concentrations exceeding limits that may be established by the Approving Authority 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.
(7) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Approving Authority 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 B.O.D., chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works.
(d) Unusual volume of flow or concentration of wastes constituting “slugs” as defined herein.
(10) Waters or wastes containing substances that are not amendable to treatment or reduction by the sewage treatment processes employed, or are amendable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(11) Any water or wastes that, by interaction with other water or wastes in the sanitary sewer system, release obnoxious gases, form suspended solids that interfere with the collection system, or create a condition deleterious to structures and treatment processes.
(12) Incompatible pollutants in excess of the allowed limits as determined by local, state, and federal laws and regulations in reference to pretreatment standards developed by the Environmental Protection Agency, 40 CFR 403, as amended from time to time.
(13) Any waters or wastes discharged to the sewer containing over 0.1 mg/l hexqualent chromium per 24 hours composite.
(E) (1) If any waters or wastes are discharged, or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in division (D) of this section, and which, in the judgement of the Approving Authority, may have a deleterious effect upon the sewage works, process, equipment, or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the Approving Authority may:
(a) Reject the wastes.
(b) Require pretreatment to an acceptable condition for discharge to the public sewers.
(c) Require control over the quantities and rates of discharge; and/or
(d) Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer discharges under the provisions of division (J) of this section.
(2) If the Approving Authority permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the Approving Authority, and subject to the requirements of all applicable codes, ordinances and laws.
(F) Grease, oil, and sand interceptors shall be provided when, in the opinion of the Approving Authority, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand, or other harmful ingredients; except that such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the Approving Authority, and shall be so located as to be readily and easily accessible for cleaning and inspection.
(G) Where preliminary treatment or flow-equalizing facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at their expense.
(H) When required by the Approving Authority, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable control manhole, together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, and measurement of the wastes. When required, the manhole shall be accessible and safely located, and shall be constructed in accordance with plans approved by the Approving Authority. The manhole shall be installed by the owner at their expense, and shall be maintained by them so as to be safe and accessible at all times.
(I) All measurements, tests, and analyses of the characteristics of waters and wastes to which reference is made in this chapter shall be determined in accordance with the latest edition of “Standard Methods for the Examination of Water and Wastewater”, published by the American Public Health Association, and shall be determined at the control manhole provided, or upon suitable samples taken at the control manhole. In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected. Sampling shall be carried out by customarily accepted methods to reflect the effect of constituents upon the sewage works and to determine the existence of hazards to life, limb, and property. The particular analyses involved will determine whether a 24-hour composite of all outfalls of premise is appropriate or whether a grab sample or samples should be taken. Normally, but not always, B.O.D. and suspended solids analyses are obtained from 24-hour composites of all outfalls, whereas pHs are determined from periodic grab samples.
(J) No statement contained in this section shall be construed as preventing any special agreement or arrangement between the City and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the City for treatment, subject to payment therefor, by the industrial concern.
(K) WPDES permit. No person shall cause or permit a discharge into the sanitary sewers that would cause a violation of the municipality’s WPDES permit and any modification thereof.
(L) New connections. New connections to the municipality’s sanitary sewer system will be allowed only if there is available capacity.
(M) Pretreatment. Persons discharging industrial wastes into any public sewer may be required to pretreat such wastes, if the Approving Authority determines pretreatment is necessary to protect the wastewater treatment facilities or to prevent the discharge of incompatible pollutants. In that event, such person shall provide at their expense such pretreatment or processing facilities as may be determined necessary to render wastes acceptable for admission to the sanitary sewers.
(Ord. 1077, passed 10-18-22) Penalties, see § 5.3.09