(a) The sanitary sewers shall be used for all waterborne wastes from water closets, urinals, lavatories, bathtubs, showers, laundry tubs, refrigerator drips, soda fountains, drinking fountains, sinks, cellar floor drains, stable floor drains, and garage floor drains (when kept free from excess oil or gasoline), whether from residences, factories or business buildings, schools, or public buildings, wherever or however located, and for no other purpose. No waste from such fixtures shall be permitted to enter the storm sewers. No wastes which are likely to cause damage or stoppage of sewers or which may interfere with purification of sewage shall be permitted to enter the sanitary sewers, and if any such are discovered the sewer discharging such waste shall be disconnected and the offending wastes shall be treated or otherwise disposed of by the owner. Connection with a cesspool or a privy vault shall not be made into a sanitary, combined or storm water sewer. A trap for the interception of grease and oil shall be provided on a connection from a hotel, restaurant, club, or institutional kitchen, and from a public garage or automobile washing station. Such trap shall be satisfactory to the Municipal Manager.
(b) No person shall discharge or cause to be discharged any of the following described waters and wastes to any public sewer that, in amounts or concentrations, would cause damage to the sanitary sewage collection/conveyance or wastewater treatment system, all of which might endanger public safety and the physical integrity of the wastewater treatment facility or cause it to violate its NPDES permit.
(1) Any gasoline, benzine, 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 pH lower or higher than that encountered in the system or having any other corrosive property capable of causing damage or hazard to structures, equipment/operation and personnel of the wastewater treatment works without a permit to do so;
(4) Solid or viscous substances in quantities or of a size as may be capable of causing obstruction to the flow in sewers, or other interference with the operation of the wastewater facilities such as (but not limited to) ashes, bone, cinders, sand, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and flashings, entrails, and paper dishes, cups, milk containers, and the like, either whole or ground by garbage grinders.
(c) The following described substances, materials, waters, or waste shall be limited in discharges to concentrations which will not harm either the sewers; wastewater treatment processes or equipment; will not have an adverse impact on the receiving stream; or will not otherwise endanger lives, limb, public property, or constitute a nuisance. Council may set limitations lower than those established below if, in their opinion, the more severe limitations are necessary to meet the above noted objectives. In forming this opinion as to acceptability, Council will consider such factors as the quantity of waste in relation to flows and velocities in the sewers, materials used in the construction of the sewers, 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 of wastewater discharge to the sanitary sewer which shall not be violated without approval of Council are as follows:
(1) Wastewater having a temperature higher than 150 degrees F (65 degrees C).
(2) Wastewater containing more than twenty-five milligrams per liter of petroleum oil, nonbiodegradable 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. Garbage grinders may be connected to sanitary sewers from homes, motels, institutions, restaurants or similar places where garbage originates from the preparation of food in kitchens for consumption on the premises or when served by caterers.
(5) Any waters or wastes containing iron, chromium, copper, zinc and similar toxic substances to such a degree that any material received in the composite wastewater at the wastewater treatment plant exceeds the limits established by the Municipality's NPDES permit.
(6) Any waters or wastes containing odor-producing substances exceeding limits established by Council.
(7) Any radioactive wastes or isotopes of a half-life or concentration as may exceed limits established by Council in compliance with applicable state or federal regulation.
(8) Quantities of flow, concentrations, or both which constitute a "slug." A "slug" shall mean any discharge of water or wastewater which in concentration of any given constituent or in quantity of flow exceeds for any period of duration longer than fifteen minutes more than five times the average twenty-four hour concentration of flows during normal operation and adversely affects the collection system and performance of the wastewater treatment works.
(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 the degree that the wastewater treatment plant effluent cannot meet the requirements of its NPDES permit to discharge to the receiving waters of Wolf Creek.
(10) Any waters or wastes which, by interaction with other water or wastes in the public sewer system, release noxious gases from suspended solids which interfere with the collection system, or create a condition deleterious to structures or treatment processes.
(11) Toxic substances (a list of which is published from time to time by the Administrator of the U.S. EPA), consistent with Section 307(a) of the Clean Water Act, which may not be discharged to a public sewer system. The toxic substances include, but are not limited to, arsenic, cadmium, chromium, copper, cyanide, lead, mercury, nickel, phenols, phthalate esters, silver, and zinc.
(d) If any waters or wastes are discharged or are proposed to be discharged to the public sewers, which waters contain the substances or processes enumerated in subsection (b) and (d) hereof and which in the judgment of Council may cause the Municipality to violate its NPDES permit and may have a deleterious effect upon the wastewater facilities, processes, equipment, or receiving waters, or cause the water quality standards of the stream to be violated, or which otherwise create a hazard to life or constitute a public nuisance, Council may:
(1) Reject the wastes.
(2) Surcharge for extra strength waste.
(3) Require pretreatment in accordance with Section 40 CFR 403 (Pretreatment Standards) pursuant to Section 307(b) of the Clean Water Act (CWA). Such compliance as to be in accordance with federal, state, or other pretreatment ordinances.
(4) Require control over the quantities and rates of discharge.
(5) Require payment to cover added cost of handling and treating the wastes not covered by existing taxes or sewer charges.
(In all such cases, special agreements or arrangements are authorized for the treatment and disposal of the wastes to the extent that other environmental laws and regulations are complied with.)
(e) When required by Council, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable structure together with the necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, and measurement of wastes. The structures, when required, shall be accessible and safely located and shall be constructed in accordance with plans approved by the Municipal Manager. 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 accessible at all times.
(f) When discharge permits are issued to industries discharging to the public sewer system, the dischargers shall report quarterly as to compliance with the discharge permits.
(Ord. 1990-08. Passed 8-21-90.)