(A) No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof run off, subsurface drainage, cooling water or unpolluted industrial wastewaters into any sanitary sewer.
(B) Storm water and all other unpolluted drainage shall be discharged into storm sewers or into a natural outlet approved by the district. Industrial cooling water or unpolluted process waters may be discharged into a storm sewer or natural outlet; such discharges must have a discharge permit issued by the state.
(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 waters or wastes containing toxic or poisonous solids, liquids or gases in sufficient quantity to either singly or, by interaction with other wastes, injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance or create a hazard in the receiving waters of the sewage treatment plant, including, but not limited to, cyanides in excess of two mg/l as CN in the wastes as discharged into the public sewer;
(3) Any discharge prohibited by 40 C.F.R. § 403.5;
(4) Any discharge prohibited by 40 C.F.R. § 403.6; or
(5) Any combination of discharges that causes a treatment plant to exceed its influent capacity as listed in § 8 of the City of Sioux City’s Pretreatment Program.
(D) No person shall make connection of roof downspouts, interior and exterior foundation drains, areaway drains or other sources of surface runoff or groundwater to a building sewer or building drain which, in turn, is connected directly or indirectly to a public sanitary sewer.
(E) All buildings shall be constructed with a building drain high enough to permit gravity flow to the public sewer. Use of pumps is discouraged and shall not be permitted without the express written permission from the district. The district may give its permission if it finds that said pump is necessary to prevent an adverse effect upon the owner of the property.
(F) No person shall discharge or cause to be discharged to any public sewer the following described substances, materials, waters or wastes without the express written permission from the district. The district may give its permission if it finds such wastes will not harm the public sewers, sewage treatment process or equipment, have an adverse effect on the receiving stream, or will not otherwise endanger life, limb, public property or constitute a nuisance. In forming its opinion as to the acceptability of these wastes, the district will give consideration to such factors 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 other pertinent factors. The substances prohibited are:
(1) Any liquid or vapor having a temperature higher than 150ºF or 65ºC;
(2) Any water or waste containing fats, wax, 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 32ºF and 150ºF or 0ºC and 65ºC;
(3) Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor greater than one horsepower shall be subject to the review and approval of the district;
(4) Any waters or wastes containing strong acid iron pickling wastes or concentrated plating solutions;
(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 limit established by the director of 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 district as necessary, after treatment of the composite sewage to meet the requirements of the state, federal or other public agencies of jurisdiction for such discharge to the receiving waters;
(7) Any radioactive wastes or isotopes of such half life or concentration as may exceed limits established by the Director in compliance with the applicable state or federal regulations;
(8) Any waters or wastes having a pH in excess of 9.5;
(9) Materials which exert or cause:
(a) Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions);
(b) Unusual chemical oxygen demand or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works; or
(c) Unusual concentration of wastes constituting slugs.
(10) Any waters or wastes having:
(a) A five-day biochemical oxygen demand greater than 250 parts per million by weight;
(b) Containing more than 300 parts per million by weight of suspended solids; or
(c) Having an average daily flow greater than 2% of the average sewage flow of the district.
(11) 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; and
(12) Any waters or wastes containing dissolved sulfides in excess of one-half mg/l.
(G) If any waters or wastes are discharged, or are proposed to be discharged into the public sewers, which waters contain the substances or possess the characteristics enumerated herein and which, in the judgment of the district, 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 district may:
(1) Reject the wastes;
(2) Require treatment to an acceptable condition for discharge into the public sewers. To this end, the district may require pretreatment to:
(a) Reduce the biochemical oxygen demand to 300 parts per million by weight; or
(b) Reduce the suspended solids to 350 parts per million by weight.
(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 this chapter.
(H) If the district permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and written approval of the district and subject to the requirements of all applicable codes, ordinances and laws. The district may require a compliance schedule for the design, construction and installation of equipment for such pretreatment works. No construction shall commence on such pretreatment facilities until the written approval of the district is obtained. The costs of all pretreatment facilities shall be paid by the person contributing the wastes.
(I) The owner of any property serviced by a building sewer carrying industrial wastes shall, at the request of the district, install a suitable sampling station or stations upon each and every building sewer or combine the building sewers into a common building sewer upon which one sampling station shall be placed. The sampling station or stations shall be furnished with such necessary meters and other appurtenances in the building sewer or sewers to facilitate observation, sampling and measurement of the wastes. Such sampling station or stations shall be accessible and safely located, and shall be constructed in accordance with plans approved by the district. The sampling station or stations shall be installed by the owner at his or her expense and shall be maintained by him or her so as to be safe, accessible and in good working order at all times.
(J) All measurements, tests and analysis 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 sampling station provided, or upon suitable samples taken at the sampling station. In the event that no special sampling station has been required, the sampling station shall be considered to be the nearest downstream manhole in the sewer from 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 the 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.)
(K) No industrial user shall discharge or cause to be discharged to any public sewer any industrial wastes without a valid permit from the district. When the district has reason to believe that a contributor has been discharging, is discharging or is about to discharge any industrial wastes into a public sewer and that a permit should be required of the contributor to effectuate the requirements of this chapter, he or she shall request such contributor to file an application for such a permit, which application shall be completed and returned to the district within 30 days after the receipt thereof. All applications for a permit under this section shall require the application to provide:
(1) The name, address and telephone number of the applicant;
(2) The location and legal description of the property to be covered by the permit;
(3) A general statement of the type of operations conducted and to be conducted on the property;
(4) A plat of the property showing accurately all sewers and drains; and
(5) A complete schedule of all process waters and industrial wastes produced or expected to be produced for discharge from the property, including a description of the character of each waste, the daily volume and maximum rates of discharge and representative analysis.
(L) All applications shall also require the applicant to agree to:
(1) Furnish at the request of the district any additional information relating to the installation or use of the industrial sewer for which the permit is sought;
(2) Accept and abide by all provisions of this chapter and all other pertinent ordinances and regulations which may be adopted in the future;
(3) Operate and maintain any waste pretreatment facilities, as may be required as a condition of acceptance into the public sewers of the industrial wastes involved, in an efficient manner at all times, and at no expense to the district;
(4) Cooperate at all times with the district in the inspecting, sampling and study of the industrial wastes and in the inspecting of any facilities provided for pretreatment;
(5) Notify the district immediately in the event of any accident, negligence or other occurrence with occasions discharged into the public sewers of any wastes or process waters not covered by the permit; and
(6) Provide and submit notices and reports as required by 40 C.F.R. § 403.12.
(M) If, after examination by the district of the information contained in an application for a permit hereunder, it is determined by the district that the characteristics of the proposed discharge do not conflict with the provisions of this chapter, a permit shall forthwith be issued allowing the discharge of such wastes to the public sewers; but, if it is determined by the district that the characteristics of the wastes are not in compliance with the provisions of this chapter, the application shall be denied by the district and the applicant forthwith advised in writing by the district of steps which must be taken to ensure compliance with the provisions of this chapter.
(N) Grease, oil and sand interceptors shall be provided when, in the opinion of the district, 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 district, and shall be located as to be readily and easily accessible for cleaning and inspection. In the maintaining of these interceptors, the owner(s) shall be responsible for the proper removal and disposal by appropriate means of the captivated material and shall maintain records of the dates, and means of disposal which are subject to review by the district. Any removal and hauling of the collected materials not performed by owner(s) personnel must be performed by currently licensed waste disposal firms.
(O) Where pretreatment or flow equalizing facilities are provided or required for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner(s) at his or her expense.
(P) The district may require a user of sewer services to provide information needed to determine compliance with this chapter. These requirements may include:
(1) Wastewater discharge peak rate and volume over a specified time period;
(2) Chemical analyses of wastewater;
(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; and
(7) Details of systems to prevent and control the losses of materials through spills to the municipal sewer.
(Q) Each industrial user shall, upon request of the district, furnish the district with information regarding the number of units processed in a stated period and the number of units of finished product produced in the same period.
(R) No statement contained in this chapter shall be construed as preventing any special agreement or arrangement between the district and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the district for treatment.
(Prior Code, § 7-194)