(a) Discharge of Storm Water, Surface Water, Unpolluted Industrial Process Waters, Prohibited.
(1) No person shall make connection of roof down spouts, foundation drains, area-way drains or other sources of surface runoff or ground water to a building sewer or building drain which is connected directly or indirectly to a public sanitary sewer, and no person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, cooling water or unpolluted industrial process waters to any sanitary sewer, unless such connection or discharge is first approved by the Board for purposes of disposal of polluted surface drainage.
(2) Storm water 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 Superintendent. Unpolluted industrial cooling water or process waters may be discharged, upon approval of the Superintendent, to a storm sewer, combined sewer or natural outlet.
(b) Discharge of Certain Waters or Wastes Restricted. Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewer:
(1) Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas.
(2) Without a permit to do so, any waters or wastes having a pH lower than 5.5 or higher than 9.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment, operation and personnel of the wastewater works.
(3) Any waters or wastes containing toxic or poisonous solids, liquids or gases in sufficient quantity 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.
(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, inground garbage, whole blood, paunch, manure, hair and fleshings, entrails and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
(c) Toxic Substances. The following-described substances, materials, waters or wastes shall be limited in discharges to public sewer 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, and, will not otherwise endanger life, limb, public property or constitute a nuisance. The Board may set limitations lower than the limitations established in the standards below if, in its opinion, such reduced limitations are necessary to meet the above objectives. In forming its opinion as to acceptability, the Board 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 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 Board, are as follows:
(1) Wastewater having a temperature higher than one hundred fifty degrees Fahrenheit (sixty-five degrees Celsius).
(2) Wastewater containing more than twenty-five milligrams per liter of petroleum oil, nonbiodegradable cutting oils or a product of mineral oil origin.
(3) Wastewater from industrial plants containing floatable oils, fats, or grease.
(4) Any garbage that has not been properly shredded.
(5) Any waters or wastes containing odor-producing substances exceeding limits which may be established by the Superintendent.
(6) Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Board in compliance with applicable state and federal regulations.
(7) Quantities of flow, concentrations, or both, which constitute a "slug" as herein defined.
(8) Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment process employed, or are amenable to treatment only to such degree that the wastewater treatment plant effiuent 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 sewer system, release noxious gases, form suspended solids which interfere with the collection system or create a condition deleterious to structures and treatment processes.
(10) Any waters or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials at the sewage treatment plant.
(11) Any noxious or malodorous gas or substance capable of creating a public nuisance.
(d) Conditional Service. 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 subsection (c) hereof, and which, in the judgment of the Board, 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 Board may:
(1) Reject the wastes;
(2) Require pretreatment to an acceptable condition for discharge to public sewers;
(3) Require control over the quantities and rates of discharge; and/or
(4) Require payment to cover added cost of handling and treating the wastes not covered by existing sewer charges. The added cost for said handling and treatment shall be determined by the Superintendent.
When considering the above alternatives, the Board may give consideration to file economic impact of each alternative on the discharger. If the Board permits pretreatment or equalization of waste flows, the design and installation of the pretreatment plants and equipment shall be subject to the review and approval of the Board.
(e) Grease, Oil and Sand Interceptors.
(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, or any flammable wastes, sand and 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 Superintendent and shall be located as to be readily and easily accessible for cleaning and inspection.
(2) Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, watertight and equipped with easily removable covers which, when bolted in place, shall be gastight and watertight.
(3) In the maintaining of such 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 records shall be subject to review by the Superintendent. Any removal and hauling of the collected materials, not performed by owner(s) or their personnel, must be performed by a currently-licensed waste hauling firm.
(4) Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his expense, in continuous, satisfactory and efficient operation.
(f) Admission of Certain Wastes Subject to Approval. The admission into the public sewers of any waters or wastes having (1) a five day biochemical oxygen demand greater than three hundred parts per million by weight, or (2) containing more than three hundred fifty parts per million by weight of suspended solids, or (3) containing any quantity of substances having the characteristics described in subsections (b) or (c) hereof, or (4) having an average daily flow greater than two percent of the average daily sewage flow of the City shall be subject to the review and approval of the Board. Where necessary, in the opinion of the Board, the owner shall provide, at his expense, such preliminary treatment as may be necessary to (1) reduce the biochemical oxygen demand to three hundred parts per million and the suspended solids to three hundred fifty parts per million by weight, or (2) reduce objectionable characteristics or constituents to within the maximum limits provided for in subsections (b) or (c) hereof, or (3) control the quantities and rates of discharge of such waters or wastes. Plans, specifications and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the Board and of the State Water Pollution Control Commission, and no construction of such facilities shall be commenced until such approvals are obtained in writing.
(g) Maintenance of Preliminary Treatment Facilities. Where preliminary treatment, pretreatment or flow-equalizing facilities are provided for any waters or wastes, they shall be maintained by the owner, at his expense, in continuous, satisfactory and efficient operation.
(h) Control Manhole. When required by the Board, the owner of any property served by a building sewer carrying industrial wastes shall install a control manhole or other suitable structure in the building sewer, together with such necessary meters and other appurtenances, so as to facilitate observation, sampling and measurement of the wastes. Such manhole or structure, when required, shall be accessibly and safely located and shall be constructed in accordance with plans approved by the Superintendent. The manhole or 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) Measurement, Tests and Analyses.
(1) All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made in this article shall be determined in accordance with the latest edition of "Standard Methods for the Examination of Water and Sewage," published by the American Public Health Association, and shall be determined at the control manhole provided for in subsection (h) hereof, or upon suitable samples taken at such control manhole. In the event that no special manhole is required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected.
(2) Sampling methods, location, time durations and frequencies are to be determined on an individual basis, subject to approval by the Superintendent.
(j) Design Data on Connection. The Board may require a user of sewer service to provide information needed to determine compliance with this article, to include:
(1) Wastewater discharge peak rate and volume over a specified time period.
(2) Chemical analyses of wastewaters.
(3) Information on raw materials, processes and products affecting wastewater volume and pollutant loadings.
(4) Quantity and disposition of specific liquid, sludge, oil, solvent or other materials important to sewer use control.
(5) A plot plan of sewers on 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.
(k) Special Agreements. No statement contained in this article shall be construed as preventing any special agreement or arrangement between the board and any industrial concern, whereby an industrial waste of unusual strength or character may be accepted by the board for treatment, subject to payment therefor by the industrial
concern.
(3-3-97)