(A) No person(s) shall discharge or cause to be discharged to any sewer unpolluted waters such as stormwater, surface water, groundwater, roof runoff, subsurface drainage, or cooling water, except stormwater runoff from limited areas which may be polluted at times, to be discharged to the sanitary sewer without prior permission of the city.
(B) Stormwater other than that exempted under division (A) above, and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm sewers, or to natural outlet approved by the city. Unpolluted industrial cooling water or process waters may be discharged, on approval of the city, to a storm sewer, combined sewer, or natural outlet.
(C) No person(s) shall discharge or cause to be discharged any of the following described water or wastes to any public sewers:
(1) Any gasoline, benzene, naphtha fuel oil, or other flammable or explosive liquid, solid, or gas;
(2) Any waters containing toxic or poisonous solids, liquids, or gases in sufficient quantity, either singly or by interaction with other wastes, to contaminate the sludge of any municipal system, 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 or have an adverse effect on the waters receiving any discharge from the treatment works. Each user which discharges any toxic pollutants which cause an increase in the cost of managing the effluent or the sludge of the city’s treatment works shall pay for such increased costs; and
(3) 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 wastewater facilities 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 and paper dishes, cups, milk containers, and the like, either whole or ground by garbage grinders.
(D) The following described substances, materials, waters, or wastes shall be limited in discharges to municipal systems to concentrations or quantities which will not harm either the sewers, the sludge of any municipal system, the wastewater treatment process or equipment, will not have an adverse effect on the receiving stream, or will not otherwise endanger lives, limb, public property, or constitute a nuisance. The city may set limitations lower than the limitations established in the regulations below if, in his or her opinion, such more severe limitations are necessary to meet the above objectives. In forming his or her opinion as to the acceptability, the city will give consideration to such factors as the quantity of subject waste in relation to flows and velocities in the sewers, materials of construction of the sewers, the wastewater treatment process employed, capacity of the wastewater treatment plant, and other pertinent factors. The limitations or restrictions on materials or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the city are as follows:
(1) Wastewater having a temperature higher than 150ºF;
(2) Wastewater containing more than 25 milligrams per liter of petroleum oil, nonbiodegradable cutting oils, or product of mineral oil origin;
(3) Wastewater from industrial plants containing floatable oils, fat, or grease;
(4) Any garbage that has not been properly shredded (see § 52.01). Garbage grinders may be connected to sanitary sewers from homes, hotels, institutions, restaurants, hospitals, catering establishments, or similar places where garbage originates from the preparation of food in kitchens for the purpose of consumption on the premises or when served by caterers;
(5) Any waters or wastes containing iron, chromium, copper, zinc, and similar objectionable or toxic substances to such degree that any such material received in the composite wastewater at the wastewater treatment works exceeds the limits established by the city for such materials;
(6) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the city;
(7) 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;
(8) Quantities of flow, concentrations, or both which constitute a “slug” as defined herein;
(9) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amenable to treatment only to such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters; and/or
(10) Any water or wastes which, by interaction with other water or wastes in the public sewer system, release obnoxious gases, form suspended solids which interfere with the collection system, or create a condition deleterious to structures and treatment processes.
(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) above, and which in the judgment of the city, may have a deleterious effect upon the wastewater facilities, processes, equipment, or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the city 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 charges under the provisions of division (K) below.
(2) If the city 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 city and State Department of Environment and Energy.
(F) Grease, oil and sand interceptors shall be provided when, in the opinion of the city, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts as specified in division (D)(3) above, 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 city and the American National Standards Institute Uniform Plumbing Code, ASME A112.14.3 and ASME A112.14.4 and shall be located as to be readily and easily accessible for cleaning and inspection. In the maintaining of these interceptors, the owner(s) shall be responsible for the proper removal and disposal by appropriate means of the captivated material and shall maintain records of the dates and means of disposal which are subject to review by the city.
(G) Where pretreatment or flow-equalization facilities are provided or required for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner(s) at his or her expense.
(H) When required by the city, the owner(s) of any property serviced by a sewer service line carrying industrial wastes shall install a suitable structure together with such necessary meters and other appurtenances in the sewer service line to facilitate observation, sampling, and measurement of wastes. Such structures, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the city. The structure shall be installed by the owner at his or her expense, and shall be maintained by him or her so as to be safe and accessible at all times to the city.
(I) The city may require a user of sewer services to provide information needed to determine compliance with this chapter. These requirements may include:
(1) Wastewater’s discharge peak rate and volume over a specified time period;
(2) Chemical analyses of wastewaters;
(3) Information on raw materials, processes, and products affecting wastewater volume and quality;
(4) Quantity and disposition of specific liquid, sludge, oil, solvent, or other materials important to sewer use control;
(5) A plot plan of sewers of the user’s property showing sewer and pretreatment facility location;
(6) Details of wastewater pretreatment facilities; and/or
(7) Details of systems to prevent and control the losses of materials through spills to the municipal sewer.
(J) 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 paid for by the owner. Sampling methods, location, times, durations, and frequencies are to be determined on an individual basis subject to approval by the city.
(K) 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.
(Prior Code, § 52.05) Penalty, see § 52.99