(A) No person shall discharge or cause to be discharged to any sanitary sewer, either directly or indirectly, storm water, surface water, ground water, roof runoff, subsurface drainage, uncontaminated cooling water, unpolluted water or unpolluted industrial process water. The authority shall require the removal of unpolluted waters from any wastewater collection or treatment facility if the removal is economical and in the best interests of all users of those facilities, as determined by the authority.
(B) Storm water and all other unpolluted drainage shall be discharged to the sewers which are specifically designated as combined sewers or storm sewers or to a natural outlet approved by the approving authority. Industrial cooling water or unpolluted process waters may be discharged on approval of the approving authority, to a storm sewer, combined sewer or natural outlet.
(C) 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) Any water 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, or which constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of the sewage treatment plant;
(3) Any water 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;
(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 sewage works, such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch, manure, hair and fleshing, entrails and paper dishes, cups, milk containers and the like, either whole or ground by garbage grinders; and
(5) Wastes at a flow rate and/or pollutant discharge rate (slugs) which are excessive over relatively short time periods so that there is a treatment process upset and subsequent loss of treatment efficiency.
(D) Users of the treatment works shall immediately notify the authority of any unusual flows or wastes that are discharged accidentally or otherwise into the sewer system.
(E) 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 approving authority, that such 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 his or her opinion as to the acceptability of these waters, the approving authority will consider factors such as the 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 maximum limits established by regulatory agencies. The following substances are prohibited:
(1) Any liquid or vapor having a temperature higher than 150°F (65°C);
(2) Any water or wastes containing toxic or poisonous materials 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);
(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 approving authority;
(4) Any water or wastes containing strong acid, iron pickling wastes or concentrated plating solutions whether neutralized or not;
(5) Any water or wastes containing iron, chromium, copper, zinc or similar objectionable or toxic substances, or wastes exerting an excessive chlorine requirement, to such degree that any material received in the composite sewage at the sewage treatment works exceeds the limits established by the approving authority for these materials;
(6) Any water or wastes containing phenols or other taste- or odor-producing substances, in concentrations exceeding limits which may be established by the approving authority as necessary after treatment of the composite sewage, to meet the requirements of the state, federal or other public agencies of jurisdiction for discharge to the receiving waters;
(7) Any radioactive wastes or isotopes of a half life or concentration which may exceed limits established by the approving authority in compliance with applicable state or federal regulations;
(8) Any water or wastes having a pH in excess of 9.5;
(9) Any mercury or any of its compounds in excess of 0.0005 mg/l at any time except as permitted by the approving authority in compliance with applicable state and federal regulations;
(10) Any cyanide in excess of 0.025 mg/l at any time except as permitted by the approving authority in compliance with applicable state and federal regulations; and
(11) Materials which exert or cause any of the following:
(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 BOD, chemical oxygen demand or chlorine requirements in quantities which would constitute a significant load on the sewage treatment works;
(d) Unusual volume of flow or concentrations of wastes constituting “slugs”, as defined in this chapter; and
(e) Water or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed or which are amenable to treatment only to a degree that the sewage treatment plant effluent cannot meet the requirements of agencies having jurisdiction over discharge to the receiving waters.
(F) (1) If any water or wastes are discharged or are proposed to be discharged to the public sewers, which contain the substances or possess the characteristics enumerated above, and/ or which are in violation of the standards for pre-treatment provided in Ch. I, EPA Rules and Regulations, Subch. D, Water Programs, part 128 - Pre-Treatment, Thursday, 11-8-1973, and any amendments to this subchapter, and which in the judgment of the approving authority 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 approving authority may do any of the following:
(a) Reject the wastes;
(b) Require pre-treatment to an acceptable condition for discharge to the public sewers;
(c) Require control over the quantities and rates of discharge; and/or
(d) Require payment to cover the added costs of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions hereof.
(2) If the approving authority permits the pre-treatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the approving authority, and subject to the requirements of all applicable codes, ordinances and laws.
(G) Grease, oil and sand interceptors or traps shall be provided when, in the opinion of the authority, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand and other harmful ingredients; except that, these interceptors or traps will not be required for private living quarters or dwelling units. All interceptors or traps shall be of a type and capacity approved by the authority and shall be located so as to be readily and easily accessible for cleaning and inspection. They will be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature and shall be of substantial construction, to be gas-tight, water-tight and equipped with easily removable covers. Where installed, all grease, oil and sand interceptors or traps shall be maintained by the owner at his or her expense in continuously efficient operation at all times.
(H) Where preliminary treatment or flow- equalizing facilities are provided, they shall be maintained continuously in satisfactory and effective operation by the owner at the owner’s expense.
(I) The owner of any property serviced by a building sewer carrying industrial waste or other non- residential wastewater may be required by the authority to install a control manhole or other suitable structure together with any necessary meters and other appurtenances in the building to facilitate observation, sampling and measurement of the wastes. These structures, when required, shall be accessible and safely located and shall be constructed in accordance with plans approved by the authority. The structures shall be installed by the owner at his or her expense and shall be maintained by him or her so as to be safe and accessible at all times.
(J) The authority may require users of the treatment works, other than residential users, to supply pertinent information on wastewater flow characteristics. Measurements, tests and analyses shall be made at the user’s expense.
(K) The owner of any property serviced by a building sewer carrying industrial wastes shall provide laboratory measurements, tests and analyses of water and wastes to illustrate compliance with this chapter and any special conditions for discharge established by the authority or regulatory agencies having jurisdiction over the discharge. The number, type and frequency of laboratory analyses to be performed by the owner shall be as stipulated by the authority, but no less than once per year the industry must supply a complete analysis of the constituents of the wastewater discharge to assure compliance with the federal, state and local standards. The owner shall report the results of measurements and laboratory analyses to the authority. The owner shall bear the expense of all measurements, analyses and reporting required by the authority. At any time deemed necessary, the authority reserves the right to take measurements and samples for analysis by an outside laboratory service. Appropriate charges for sampling and analysis may be assessed to the user at the option of the authority. The results of routine sampling and analysis by the user may also be used for determination of charges, after verification by the authority.
(L) All measurements, tests and analyses of the characteristics of water and wastes to which reference is made in this section 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 or other suitable structure 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 to life, limb and property. (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.)
(M) No statement contained in this section shall be construed as preventing any special agreement or arrangements between the authority and any industrial concern where an industrial waste of unusual strength or character may be accepted by the authority for treatment. In all such cases, the provisions set forth in the sewage rate ordinance will be governing factors in any contracts.
(N) The admission into the public sewers of any water or wastes having harmful or objectionable characteristics shall be subject to the review and approval of the authority, who may prescribe limits on the strength and character of those waters and wastes. Where necessary, in the opinion of the authority, the owner shall provide at his or her expense whatever preliminary treatment may be necessary to treat those wastes prior to discharge to the public sewer. Plans, specifications and other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the authority and the state’s Environmental Protection Agency or the state’s Department of Public Health, and no construction of any facilities shall be commenced until approval is obtained in writing. Where preliminary treatment facilities are provided for any water or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his or her expense, and shall be subject to periodic inspection by the authority to determine that the facilities are being operated in conformance with applicable federal, state and local laws and permits. The owner shall maintain operating records and submit to the authority a monthly summary report of the character of the influent and effluent to verify performance facilities against authority monitoring records.
(O) Pre-treatment of industrial wastes from major contributing industries prior to discharge to the treatment works is required and is subject to the rules and regulations adopted by the U.S. Environmental Protection Agency and published in the Federal Register on 11-8-1973 (40 C.F.R. part 403), Federal Guidelines, dated October, 1973, any more stringent requirements established by the authority, and any subsequent federal guidelines and rules and regulations.
(P) Industrial cooling water, which may be polluted with insoluble oils or grease or suspended solids, shall be pre-treated for removal of pollutants and the resultant clear water shall be discharged in accordance with division (E) above.
(Q) Agents of the authority shall be permitted to enter all properties for the purposes of inspection, observation, measurement, sampling and testing of wastewater discharges and discharge facilities.
(2010 Code, § 171.02) Penalty, see § 52.99