(a) No person shall discharge or cause to be discharged any storm water, surface water, groundwater, roof runoff, subsurface drainage or foundation drainage into any sanitary sewer in areas of the City where there is constructed both a sanitary sewer and a storm sewer.
(b) In all new construction, in areas where there are at present constructed both sanitary sewers and storm sewers, where foundation drains are installed, the foundation drains must discharge into the surface water drainage system or storm sewer directly or through a sump pump installation.
(c) Storm water other than that exempted, above, and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm sewers or to a natural outlet approved by the approving authority and other regulatory agencies. Unpolluted industrial cooling water or process waters may be discharged, on approval of the approving authority, to a storm sewer, combined sewer or natural outlet.
(d) The following described substances, materials, waters or wastes shall be limited in discharges to municipal systems to concentrations or quantities which will not harm either the sewers or 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 approving authority may set limitations lower than the limitations established herein if in his opinion such more severe limitations are necessary to meet the above 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 wastewater treatment plant, degree of treatability of the waste in the treatment plant, and other pertinent factors. The limitations on materials or characteristics of waste or wastewaters discharged to the sanitary sewer which shall not be violated without approval of the approving authority are:
(1) Wastewater having a temperature higher than 180 degrees Fahrenheit (65 degrees centigrade).
(2) Wastewater containing petroleum oil, nonbiodegradable cutting oils or product of mineral oil origin in excess of the limitations of the NPDES permit.
(3) Wastewater from industrial plants containing floatable oils, fats or grease.
(4) 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.
(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 treatment facilities exceeds the limits established by the approving authority for such materials.
(6) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the approving authority.
(7) 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.
(8) Quantities of flow, concentrations or both, which constitute a slug.
(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 such degree that the wastewater treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(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) 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 above, and which in the judgment 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;
(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 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 discharger. 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.
(f) Grease, oil and sand interceptors 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 interceptors shall not be required for private living quarters or dwelling units. All interceptors 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 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 approving authority. Any removal and hauling of the collected materials not performed by the owner must be performed by currently licensed waste disposal firms.
(g) Where pretreatment or flow equalizing facilities are provided or required for waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
(h) 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 structure, when required, shall be accessibly 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.
(i) The approving authority may require a user of sewer services to provide information needed to determine compliance with this ordinance. These requirements may include:
(1) Wastewaters discharge peak rate and volume over a specified period of time;
(2) Chemical analyses 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;
(7) Details of systems to prevent and control the losses of materials through spills to the public sewer.
(j) All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made in this ordinance shall be determined in accordance with "Standard Methods". Sampling methods, locations, times, durations and frequencies are to be determined on an individual basis subject to approval by the approving authority.
(k) No person shall discharge nonacceptable industrial wastes into the sewerage system whether directly or indirectly. Where investigations reveal the presence in the sewerage system of nonacceptable industrial wastes emanating from any lot, land, building or premises, located within or without the corporate limits, the owner, lessor, tenant or occupant of such lot, land, building or premises shall be required to treat, neutralize or in other ways prepare the noxious substances therein to the satisfaction of the City Manager, in order to convert the same into acceptable industrial wastes.
(l) 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 sewage disposal works, either before or after pretreatment, provided that there is no impairment of the functioning of the sewage disposal works by reason of the admission of such wastes, and no extra costs are incurred by the City without recompense by the person. (Ord. 1979-11. Passed 1-30-79.)