(A) No person(s) shall discharge or cause to be discharged any unpolluted waters such as stormwater, groundwater, roof runoff, subsurface drainage, or cooling water to any sewer, except stormwater runoff from limited areas, which stormwater may be polluted at times, may be discharged to the sanitary sewer by permission or be discharged to the sanitary by permission of the Superintendent.
(B) Stormwater other than the exempted under division (A) above, and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers to storm sewers to a natural outlet approved by the Superintendent and other regulatory agencies. Unpolluted industrial cooling water or process waters may be discharged on approval of the Superintendent to a storm sewer, combined sewer, or natural outlet.
(C) No person(s) shall discharge or cause to be discharged any of the following waters or wastes into 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 waste 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 or the wastewater works; or
(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, bones, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, underground 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) (1) 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 lies, limb, public property; or will not constitute a nuisance.
(2) The Superintendent may set limitations lower than the limitations established in the regulation below if in his or her opinion such more severe limitations are necessary to met the above objectives. In forming his or her opinion as to the acceptability, the Superintendent will give consideration to such factors as the quantity of subject waste in relation to flows and velocities in the sewers, material 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.
(3) The limitations of restricting on. materials or characteristics of waste or wastewater discharged to the sanitary sewer which shall not be violated without approval of the Superintendent are as follows:
(a) Wastewater having a temperature higher than 150°F (65°C);
(b) Wastewater containing more than 25 milligrams per liter of petroleum oil, non-biodegradable cutting oils, or product of mineral oil origin;
(c) Industrial wastewater containing floatable oils, fat, or grease;
(d) Any garbage that has not been properly shredded (see definition in § 13.12.010). 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 of the premises or when served by caterers;
(e) 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 Superintendent for such materials;
(f) Any waters or wastes containing odor producing substances exceeding the limits which may be established by the Superintendent;
(g) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Superintendent in compliance with applicable state or federal regulations;
(h) Quantities of flow, concentrations, or both which constitute a “slug” as defined herein;
(i) 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 requirement of other agencies having jurisdiction over discharge to the receiving waters; or
(j) 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 structure 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 Superintendent, 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 Superintendent 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 added cost of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions of division (J) below.
(2) When considering the above alternatives, the Superintendent shall give consideration to the economic impact of each alternative on the discharger. If the Superintendent 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 Superintendent.
(F) (1) Grease, oil, and sand interceptors shall be provided, when, in the opinion of the Superintendent, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts, as specified in division (D)(3)(c) above or any flammable wastes, sand, or other harmful ingredients; except that such interceptors shall not be required for private living quarters or swelling units.
(2) All interceptors shall be of a type and capacity approved by the Superintendent 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 captured material and shall maintain records of the dates and means of disposal which are subject to review by the Superintendent.
(3) Any removal and hauling of the collected material not performed by the owner(s)’ personnel must be performed by currently licensed waste disposal firms. The Superintendent shall, on finding that any required grease, oil, and sand interceptor is not being property maintained, provide the owner(s) with written notice of the lack of maintenance and allowing a maximum of five calendar days in which to provide proper maintenance. If the owner(s) fail to provide the required proper maintenance within the stated time period, the Superintendent shall direct that the maintenance of the grease, oil, and sand interceptor to be performed by the city forces that for that service, the owner(s) shall be charged a fee equal to the actual cost of such service, plus a penalty of $100; said penalty to be added to the owner(s) following month’s water and sewer bill, to be payable in the same manner as said bill, with the same penalties for nonpayment as would be incurred for nonpayment of the balance of the bill.
(G) Where pretreatment or flow-equalizing 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) (1) When required by the Superintendent, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable structure together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, and measurement of the wastes. Such structure, when required, shall be accessibly and safely located and shall be constructed in accordance with plans approved by the Superintendent.
(2) 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.
(I) (1) The Superintendent may require a user of sewer services to provide information needed to determine compliance with this subchapter.
(2) These requirements may include:
(a) Wastewater discharge peak rate and volume over a specified time period;
(b) Chemical analyses of wastewater;
(c) Information oh raw materials, processes, and products affecting wastewater volume and quality;
(d) Quantity and disposition of specific liquid, sludge, oil, solvent, or other materials important to sewer use control;
(e) A plot plan of sewers of the user’s property showing sewer and pretreatment facility location;
(f) Details of wastewater pretreatment facilities; or
(g) 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 subchapter shall be determined in accordance with the latest edition of Standard Methods for Examination of Water and Wastewater, published by the America Public Health Association. Sampling methods, location, times, duration, and frequencies are to be determined on an individual basis subject to approval by the Superintendent.
(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.
(Ord. 96-2, passed 5-6-1996)