(a) No person shall discharge or cause to be discharged any unpolluted waters such as stormwater, groundwater, roof runoff, subsurface drainage, or cooling water to any sanitary sewer.
(b) Stormwater, groundwater, roof runoff, subsurface drainage, cooling water, and other unpolluted drainage shall be discharged to such sewers as are specifically designated as storm sewers or combined sewers, or to a natural outlet approved by the Approving Authority and other regulatory agencies. Unpolluted industrial cooling water or process water may be discharged to a storm sewer, combined sewer, or natural outlet upon the approval of the Approving Authority.
(c) The following described substances, materials, waters or wastes shall be limited in discharges to the City wastewater systems to concentrations or quantities which will not harm either the sewers, 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 Approving Authority of the City may set limitations lower than the limitations established herein, if, in his opinion, such more severe limitations are necessary to meet the stated objectives. In forming his opinion as to the acceptability, the Approving Authority 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 treatment plant, degree of treatability of the waste, 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 the approval of the Approving Authority are as follows:
(1) Wastewater having a temperature higher than 180 degrees Fahrenheit (65 degrees Centigrade).
(2) Wastewater containing petroleum oil, nonbiodegradable cutting oils, or products of mineral oil origin in excess of the limitations contained in the NPDES Permit.
(3) Any garbage that has not been properly ground or 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 iron, chromium, copper, zinc, and similar objectionable or toxic substances to such degree that any such material received in the composite wastewater at the treatment facility exceeds the limits established by the Approving Authority for such materials.
(5) Any waters or wastes containing odor producing substances exceeding limits which may be established by the Approving Authority.
(6) Any radioactive wastes or isotopes of such half life or concentration as may exceed limits established by the Approving Authority in compliance with applicable State or Federal regulations.
(7) Quantities of flow, concentations, or both which constitute a slug.
(8) 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 can not meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(9) Any water or wastes which, by interaction with other waters 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.
(d) 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 this section, and which in the opinion of the Approving Authority 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 Approving Authority may:
(1) Reject the wastes; or
(2) Require pretreatment to an acceptable condition for discharge to the public sewers; or
(3) Require control over the quantities and rates of discharge; and/or
(4) Require payment to cover added costs of handling and treating the wastes not covered by existing taxes or sewer charges.
When considering the above alternatives, the Approving Authority shall give consideration to the economic impact of each alternative on the dis-
charger. If the Approving Authority permits the pretreatment or equalization of waste flows, the design and installation of the plant and equipment shall be subject to the review and approval of the Approving Authority.
(e) Grease, oil, and sand traps shall be provided when, in the opinion of the Approving Authority, they are necessary for the proper handling of liquid wastes containing floatable grease in excessive amounts, or any flammable wastes, sand or other harmful ingredients; except that such traps shall not be required for private living quarters or dwelling units. All traps shall be of a type and capacity approved by the Approving Authority and shall be located as to be readily and easily accessible for cleaning and inspection. In the maintaining of these traps 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 Approving Authority. Any removal and hauling of the collected materials not performed by owner personnel, must be performed by currently licensed waste disposal firms.
(f) Where pretreatment or flow equalizing facilities are provided or required for any water or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner, at his expense.
(g) When required by the Approving Authority, 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 structures, when required, shall be accessible and safely located and shall be constructed in accordance with plans approved by the Approving Authority. The structure shall be installed by the owner at his expense and shall be maintained by him so as to be safe and accessible at all times.
(h) The Approving Authority may require a user of sewer service to provide information needed to determine compliance with this chapter, which may include, but not be limited to:
(1) Wastewater discharge peak rate and volume over a specified period of time.
(2) Chemical analysis of the 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.
(7) Details of systems to prevent and control the losses of materials through spills to the public sewers.
(i) All measurements, tests, and analysis of the characteristics of waters and wastes to which reference is made in this chapter shall be determined in accordance with "Standard Methods" Section 144. Sampling methods, locations, times, durations, and frequencies are to be determined on an individual basis subject to the approval of the Approving Authority.
(j) Except as hereinafter provided, no person shall discharge into the City sewers:
(1) Any solids, liquids or gases which by themselves or by interaction with other substances may cause fire or explosion, or in any other way be injurious to persons, property or the operation of the wastewater treatment facilities.
(2) Any noxious or malodorous solids, liquids or gases, which either singly or by interaction with other substances, is capable of creating a public nuisance or hazard to life, or preventing entry into sewers for their maintenance and repair.
(3) Any solids, greases, slurries, or viscous material of such character or in such quantity that, in the opinion of the Approving Authority may cause an obstruction to the flow in the sewer or otherwise interfere with the proper functioning of the sewage system.
(4) Any toxic substances, chemical elements or compounds in quantities sufficient to impair the operation or efficiency of the wastewater treatment facilities, or that will pass through the facilities and cause the effluent thereof to exceed State or interstate-water quality requirements for the receiving waters.
(5) Any liquids having a pH lower than six or higher than nine, or having any corrosive property capable of causing damage or hazards to structures, equipment, or personnel of the sewage disposal facilities.
(6) Any radioactive isotopes without obtaining a special permit from the Approving Authority.
(7) Any liquid or vapor having a temperature greater than 180 degrees Fahrenheit.
(8) Any garbage that has not been ground or shredded.
(k) No statement contained in this section shall be construed as prohibiting any special agreement or arrangement between the City and any person whereby an industrial waste of unusual strength or character may be admitted to the wastewater treatment facilities, either before or after pretreatment, provided that there is no impairment of the functioning of the wastewater treatment facilities by reason of the admission of such wastes, and no extra costs are incurred by the City without recompense by the person. (Ord. 1350. Passed 11-16-78.)