(a) No person shall discharge or cause to be discharged any unpolluted stormwater, surface water, groundwater, roof runoff, subsurface drainage, uncontaminated cooling water or unpolluted industrial process waters to any sanitary sewer. The owner of a building served by a public sanitary sewer shall be responsible for the maintenance, repair, replacement, and cleaning of the private sanitary lateral located on the building owner's property. The building owner shall not be responsible for any portion of the private sanitary lateral located in the public right-of-way. If a private sanitary lateral becomes damaged, separates from the sanitary sewers, or discharges into the storm water system, the building owner, at the building owner's expense, shall repair or replace that portion of the private sanitary lateral that is located on the building owner's property and outside the public right-of-way. The repair or replacement of a private sanitary lateral under this Section shall be completed within ninety (90) days of the building owner receiving notice from the City that the private sanitary lateral must be repaired or replaced. Any repairs to or replacement of a private sanitary lateral shall be subject to inspection and approval by the City to ensure compliance with federal and state law and the City's Codified Ordinances. All owners of newly constructed buildings that discharge into the public sanitary sewers shall, at the owner's expense, install a clean-out in their sanitary lateral within or near the public right-of-way. If an existing private sanitary lateral is replaced or repaired, the building owner shall install a clean-out in the building's sanitary lateral within or near the public right-of-way at the building owner's expense. The installation of the clean-out shall be inspected and approved by the City to ensure compliance with federal and state law and the City's Codified Ordinances. Any existing roof drain connections to sanitary sewers shall be connected into an available storm sewer or shall be disconnected above ground in the manner approved by the City. The owners of all buildings situated within the City are required at their expense to disconnect all existing roof drains from sanitary sewers in accordance with the provisions of this chapter within ninety days after the date of official notice to do so.
(Ord. 2018-40. Passed 7-23-18.)
(b) Stormwater and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm drain or to a natural outlet approved by the City and other regulatory agencies. Unpolluted industrial cooling water or process waters may be discharged on approval by the City 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 sewer or treatment works:
(1) Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.
(2) Any waters or wastes having a pH lower than 6.0 or greater than 9.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the wastewater works.
(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, bones, 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, etc., either whole or ground by garbage grinders.
(d) The following described substances, materials, waters or waste shall be limited in discharges to Municipal systems to concentrations ar 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 Director may set limitations lower than the limitations established in the regulations herein if in his opinion such more severe limitations are necessary to meet the above objectives. Deliberate dilution with unpolluted water to meet the concentrations established in the regulations herein shall not be acceptable. In forming his opinion as to the acceptability, the Director will give consideration to such facts 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 wastewater discharged to the sanitary sewer which shall not be violated without approval of the Director are as follows:
(1) Wastewater having a temperature higher than 150° (65°C).
(2) Wastewater containing more than fifty milligrams per liter of petroleum oil, nonbiodegradable cutting oils, products of mineral oil origin, or floatable oils, fat, wax or grease.
(3) Any garbage that has not been properly shredded. 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.
(4) Any waters or wastes containing solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes to injure or interfere with any wastewater 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, including, but not limited to cyanides, hexavalent chromium, copper, zinc, cadmium, nickel and phenols in the wastes as discharged to the public sewer. The following concentrations shall not be exceeded in industrial wastes discharged to the public sewers:
total cyanide (CN), 0.5 milligrams per liter (mg/l)
hexavalent chromium, 1.0 mg/l
copper, 1.0 mg/l
zinc, 1.0 mg/1
cadmium, 0.2 mg/l
nickel, 2.0 mg/l
phenols, 0. 2 mg/l
lead, 0.5 mg/l
mercury, 0.01 mg/l
silver, 0.2 mg/l
These maximum concentrations may be changed as necessary by the Director or State regulatory agencies based on new information concerning inhibitory substances or to protect treatment plant processes. Industrial dischargers covered by Federal pretreatment requirements shall meet those limitations specified under the effluent guidelines published under Sections 304 b) and 307 b) of the Federal Act or the above concentrations, whichever is more stringent. Major contributing industries discharging incompatible pollutants into the public sewers shall be regulated as provided in subsection (e) hereof.
(5) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the Director or any local or State regulatory agencies.
(6) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits in compliance with applicable State or Federal regulations.
(7) Quantities of flow, concentrations or both which constitute a slug as defined in this chapter.
(8) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed, or are amenable 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.
(9) Any water or wastes which by interaction with other water or wastes in the public sewerage system, release obnoxious gases, form suspended solids which interfere with the collection system, or create a condition deleterious to structures and treatment processes.
(e) If any waters or wastes are discharged or are proposed to be discharged to the public sewers, which contain the substances or possess the characteristics enumerated in subsections (c) and (d) hereof, and which in the judgment of the Engineer, may have a deleterious effect upon the wastewater facilities, processes, equipment or receiving waters, including violation of applicable water quality standards, or which otherwise create a hazard to life or constitute a public nuisance, the Engineer shall:
(1) Reject the wastes;
(2) Require pretreatment to an acceptable condition for discharge to the public sewers;
(3) Require control over the quantities and rates of discharge; and/or
(4) Require payment to cover the added cost of handling and treating the wastes under the provisions of the appropriate ordinances.
All industrial wastes discharged to the public sewers by major contributing industries shall as a minimum meet the national pretreatment standards or best practical control technology currently available for incompatible pollutants as published in Title 40 Code of Federal Regulations Part 128 unless the City is committed, in its NPDES permit, to remove a specified percentage of the incompatible pollutant. In those instances the applicable pretreatment standards may be correspondingly reduced to levels determined by the Engineer, or his duly authorized representative, or State regulatory agencies.
If the Engineer requires 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 Engineer and State regulatory agencies and subject to the requirements of all applicable codes, ordinances and laws.
(f) For grease, oil and inorganic materials such as sand, grit, etc., interceptors shall be provided when, in the opinion of the Engineer, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts, as specified in subparagraph (d)(2) hereof, 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 Engineer, and shall be located as to be readily and easily accessible for cleaning and inspection. In the maintaining of 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 are subject to review by the Director. Any removal and hauling of the collected materials not performed by the owners' personnel must be performed by currently licensed waste disposal firms.
(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 at his expense.
(h) 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. Sampling methods, location, times, durations and frequencies are to be determined on an individual basis subject to approval by the Director.
(i) 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 possible payment therefor by the industrial concern for subsequent treatment. Any industrial concern may appeal to the City any determination made by the Engineer in the enforcement of this chapter.
(Ord. 75-50. Passed 6-16-75.)