(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 and all other unpolluted drainage shall be discharged to the sewers as are specifically designated as combined sewers or storm sewers or to a natural outlet approved by the city administration. Industrial cooling water or unpolluted process waters may be discharged, on approval of the city and applicable regulatory agencies to a storm sewer, combined sewer or natural outlet.
(Ord. 1737, passed 6-24-91) Penalty, see § 51.999
No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
(A) Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas;
(B) 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 but not limited to cyanide in excess of two mg/l or CN in the wastes as discharged to the public sewer;
(C) Any waters or wastes having a pH lower than 5.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage works; or
(D) Solid or viscous substances in quantities or of the size capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewage works, such as but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastic, wood, unground garbage, whole blood, paunch manure, hair and fleshing, entrails, and paper dishes, cups, milk containers, etc.; either whole or ground by garbage grinders.
(Ord. 1737, passed 6-24-91) Penalty, see § 51.999
No person shall discharge or cause to be discharged the following described substances, materials, waters or wastes if it appears likely in the opinion of the city administration that the wastes can harm either the sewers, sewage treatment process or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property or constitute a nuisance. In forming opinion as to the acceptability of these wastes, the city administration will give consideration to the factors as to quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors. The substances prohibited are:
(A) Any liquid or vapor having a temperature higher than 150°F (65°C).
(B) Any water or waste containing fats, gas, grease or oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32 and 150°F (0 and 65°C)
(C) 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 city administration.
(D) Any waters or wastes containing strong acid, iron pickling wastes, or concentrated plating solutions, whether neutralized or not.
(E) Any waters or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement to the degree that any material received in the composite sewage at the sewage treatment works exceed the limits established by the city administration for the materials.
(F) Any waters or wastes containing phenols or other taste or odor-producing substances in concentrations exceeding limits which may be established by the city administration as necessary, after treatment of the composite sewage, to meet the requirements of the state, federal or other public agencies of jurisdiction of the discharge to the receiving waters.
(G) Any radioactive wastes or isotopes of the half?life or concentration as may exceed limits established by the city administration compliance with applicable state or federal regulations.
(H) Any waters or wastes having a pH in excess of 9.5.
(I) Materials which exert or cause:
(1) 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).
(2) Excessive discoloration (such as but not limited to dye wastes and vegetable tanning solutions).
(3) Unusual BOD, chemical oxygen demand or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works.
(4) Unusual volume of flow or concentration of wastes constituting “slugs” as defined herein.
(J) 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 the degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(Ord. 1737, passed 6-24-91) Penalty, see § 51.999
(A) 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 §51.022 of this chapter, and which in the judgment of the city administration 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 city administration 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 the added cost of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions of §51.076 of this chapter.
(B) If the city administration 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 city administration and subject to the requirements of all applicable codes, ordinances and laws.
(Ord. 1737, passed 6-24-91)
(A) A grease interceptor shall be installed on all building sewers for all commercial and multiple dwelling unit users. Any conversion to commercial or multiple dwelling use shall be required to install a grease interceptor. The requirement for a grease interceptor may be waived by the city administration when a written request is filed indicating all of the following:
(1) The waste stream from the commercial establishment meets the terms of domestic waste defined in this chapter; and
(2) No kitchen facilities for public service, or service to more than ten residents or dwelling units as defined herein.
(B) Oil and sand interceptors shall be required when 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 the interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the city administration and shall be located as to be readily and easily accessible for cleaning and inspection. The city administration shall make the final determination of the requirements.
(Ord. 1737, passed 6-24-91)
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.
(Ord. 1737, passed 6-24-91) Penalty, see § 51.999
When required by the city administration, the user of the sewage system from any property serviced by a building sewer carrying industrial wastes shall install a suitable control manhole, together with necessary meters and other appurtenances in the building sewer to facilitate observation, sampling and measurement of the wastes. The manhole, when required, shall be accessibly and safely located and shall be constructed in accordance with plans approved by the administration. The manhole shall be installed by the user at the user's expense and shall be maintained by the user so as to be safe and accessible at all times.
(Ord. 1737, passed 6-24-91) Penalty, see § 51.999
(A) 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 the 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 or unacceptable constituents.
(B) The particular analysis involved will determine whether a 24-hour composite of all outfalls of a premises is appropriate or whether a grab sample or samples should be taken. Normally, but not always, BOD and suspended solids analyses are obtained from 24-hour composites of all outfalls, whereas pHs are determined from periodic grab samples.
(Ord. 1737, passed 6-24-91)
No statement contained in this sub-chapter 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 therefore, by the industrial concern.
(Ord. 1737, passed 6-24-91)