917.09 USE OF THE PUBLIC SEWERS.
(a) No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, uncontaminated cooling water or unpolluted industrial process waters to any sanitary sewer.
(b) Storm water, surface drainage, subsurface drainage, ground water, roof runoff, cooling water and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as storm sewers or to a natural outlet approved by the Director. Industrial cooling water or unpolluted processed waters may be discharged, on approval of the Director, to a storm sewer or natural outlet. No person shall use any such sewers without first having obtained the consent of the Director.
(c) No person shall discharge or cause to be discharged any of the following described waters or wastes into any public sewers:
(1) Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas.
(2) Any waters or wastes 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 sewage treatment process, constitute a hazard to humans or animals, create a public nuisance or create any hazard in the receiving waters of the sewage treatment plant, including cyanides.
(3) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of three-fourths horsepower (0.76 HP metric) or greater shall be subject to the review and approval of the Director.
(4) Any waters or wastes containing strong acid iron pickling wastes or concentrated plating solutions, whether neutralized or not.
(5) Any waters or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the Director for such materials.
(6) Any waters or wastes containing phenols or other taste or odor- producing substances, in such concentrations exceeding limits which may be established by the Director as necessary, after treatment of the composite sewage, to meet the requirements of State, Federal or other public agencies of jurisdiction for such discharge to the receiving waters.
(Ord. 2004-84. Passed 12-7-04.)
(7) Any radioactive wastes.
(8) Any waters or wastes having a pH of less than 5.0 or in excess of 11.0.
(9) Materials which exert or cause:
A. Unusual concentrations of inert suspended solids such as, but not limited to, Fullers earth, lime slurries and lime residues, or of dissolved solids such as, but not limited to, sodium chloride and sodium sulfate.
B. Excessive discoloration such as, but not limited to, dye wastes and vegetable tanning solutions.
C. Unusual biochemical oxygen demand, suspended solids or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works.
D. Unusual volume of flow or concentration of wastes constituting "slugs" as defined in Section 917.03(a)(89).
(Ord. 2015-096. Passed 9-15-15.)
(10) Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed or are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(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 subsection (c) hereof, and which, in the judgment of the Director may have a deleterious effect upon the sewage works, processes, equipment or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the Director may:
(1) Reject the wastes;
(2) Require pretreatment to an acceptable condition in accordance with guidelines adopted in the ordinances of this City for discharge into public sewers;
(3) Require control over quantities and rates of discharge; and/or
(4) Require payment to cover the added cost of handling and treatment of the wastes not covered by existing taxes or sewer charges under the provisions of subsection (i) hereof.
If the Director permits the 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 Director and subject to the requirements of all applicable codes, ordinances and laws.
(e) Grease, oil and sand interceptors shall be provided when, in the opinion of the Director, they are necessary for the proper handling of liquid wastes containing 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 Director and shall be located as to be readily and easily accessible for cleaning and inspection.
(f) Where preliminary treatment or flow-equalizing facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
(g) When required by the Director, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable control manhole together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling and measurement of the wastes. Such manhole, when required, shall be accessibly and safely located and shall be constructed in accordance with plans approved by the Director. The manhole 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) 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, and shall be determined at the control manhole provided or upon suitable samples taken at such control manhole. In the event that no special manhole has been 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. Sampling shall be carried out by customarily accepted methods to reflect the effect of constituents upon the sewage works and to determine the existence of hazards to life, limb and property. The particular analysis involved will determine whether a twenty-four hour composite of all outfalls of a premise is appropriate or whether a grab sample or samples should be taken. Normally, but not always, BOD and suspended solids analyses are obtained from twenty-four hour composites of all outfalls, whereas pH's are determined from periodic grab samples.
(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 payment therefor by the industrial concern.
(Ord. 2004-184. Passed 12-7-04.)