(A) Discharge of drainage. No person shall discharge or cause to be discharged any unpolluted waters such as storm water, surface water, ground water, roof runoff, subsurface drainage or cooling water to any sewer, except storm water runoff from limited areas, which storm water may be polluted at times, and which may be discharged to the sanitary sewer by permission of the city.
(B) Storm water. Storm water, other than that exempted under division (A) above, and all other unpolluted drainage, shall be discharged to such sewers as are specifically designated as storm sewers, or to a natural outlet approved by the utilities maintenance person and other regulatory agencies. Unpolluted industrial cooling water or process waters may be discharged, on approval of the utilities maintenance person, to a storm sewer or natural outlet.
(C) Regulation of sewer waste waters. No person 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 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 wastewater treatment plant;
(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 wastewater works; and
(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 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) Wastewater limitations. The following described substances, materials, waters or waste shall be limited in discharges to municipal systems to concentrations or quantities which will not harm either the sewers, 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 utilities maintenance person 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 utilities maintenance person will give his or her 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, degree of treatability of the waste in 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 utilities maintenance person are as follows:
(1) Wastewater having a temperature higher than 150°F (65°C);
(2) Wastewater containing more than 25 milligrams per liter (25 mg/l) 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 is not “properly shredded garbage”, as defined in § 54.01. 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 utilities maintenance person for such materials;
(6) Any waters or wastes containing odor producing substances exceeding limits which may be established by the utilities maintenance person;
(7) Any radioactive wastes or isotopes of such half life or concentration as may exceed limits established by the utilities maintenance person in compliance with applicable state or federal regulations;
(9) Waters or wastes containing substances which are not amendable to treatment or reduction by the wastewater treatment processes employed, or are amendable 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
(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) Discharge having deleterious effect; authority.
(1) If any waters or wastes, whether residential, commercial or of whatsoever origin, are discharged, or are proposed to be discharged to the public sewers, which water contains the substances or possess the characteristics enumerated in division (C) above, or which, in the judgment of the utilities maintenance person, may have a deleterious effect upon the wastewater facilities, process equipment or receiving waters, or which otherwise creates a hazard to life or constitute a public nuisance, the utilities maintenance person 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 (J) below, regardless of source or origin.
(2) When considering the above alternatives, the utilities maintenance person shall give consideration to the economic impact of each alternative on the discharger. If the utilities maintenance person 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 utilities maintenance person or authorized designee.
(F) Interceptors. Grease, oil and sand interceptors shall be provided when, in the opinion of the utilities maintenance person, they are necessary for the proper handling of liquid wastes containing floatable grease as specified in division (D)(3) above, or any flammable wastes, sand or other harmful ingredients in amounts deemed by the utilities maintenance person to be excessive; except, interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the utilities maintenance person, and shall be located as to be readily and easily accessible for cleaning and inspection. In maintaining these interceptors, the owner shall be responsible for the proper removal and disposal by appropriate means of the captured material and shall maintain records of the dates, and means of disposal, which records are subject to review by the utilities maintenance person at any reasonable time. Any removal and hauling of the collected materials not performed by an owner personally must be performed by currently licensed waste disposal firms.
(G) Facilities maintained at owner’s expense. Where pretreatment or flow equalizing facilities are provided or required for any waters or wastes, they shall be maintained continuously in satisfactorily and effective operation by the owner at his or her expense.
(H) Information required for wastewater sewer services. The utilities maintenance person may require a user of sewer services to provide information needed to determine compliance with this chapter. These requirements may include, but are not limited to:
(1) Wastewaters discharge peak rate and volume over a specified time period;
(2) Chemical analysis 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
(7) Details of systems to prevent and control the losses of materials through spills to the city sewer.
(I) Wastewater testing. All measurements, tests and analyses of the characteristics of water and wastes to which reference is made in this title 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. Sampling methods, location, times, durations and frequencies are to be determined on an individual basis, subject to approval by the utilities maintenance person.
(J) Special agreements or arrangements. No statement contained in this section shall be construed as preventing any special agreement or arrangement between the city and any industrial or other concern whereby any waste of unusual strength or character may be accepted by the city for treatment.
(Prior Code, § 8-3-3) Penalty, see § 10.99