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The admission into the public sewers of any waters or wastes in volumes, or with constituents, such that existing dilution conditions in the sewers or at the treatment facility would be adversely affected, shall be subject to review and approval of the Director of Public Works. Where necessary, in the opinion of the Director, pretreatment or equalizing units may be required to bring constituents or volume of flow within an acceptable level, and to hold or equalize flows so that no peak flow conditions may hamper the operation of any unit of the sewer system. The equalization or holding unit shall have a capacity suitable to serve its intended purpose and be equipped with acceptable outlet control facilities to provide flexibility in operation and accommodate changing conditions in the waste flow.
(Prior Code, § 51.114) Penalty, see § 51.999
(A) If any waters or wastes are discharged, or are proposed to be discharged to the public sewers, which contain substances or possess the characteristics enumerated in the preceding sections of this subchapter, and which in the judgment of the City Engineer, Public Works Director or Chief Building and Code Inspector or the local, state and federal agencies having jurisdiction, may have a deleterious effect upon the wastewater treatment processes, equipment or receiving waters, or which otherwise create a hazard to life or constitute a public nuisance, the Director of Public Works 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
(4) Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer user charges.
(B) In forming an opinion as to the acceptability of wastes, the Director of Public Works 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 wastewater treatment process, capacity of the wastewater treatment facility, degree of treatability of wastes in the wastewater treatment facility and other pertinent factors. Any waters or wastes having a BOD5 concentration greater than 250 mg/l or a suspended solids concentration greater than 250 mg/l or an average daily flow greater than 2% of the average total waste flow of the city shall be subject to the review of the Director of Public Works.
(C) If the Director of Public Works 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 Engineer, Chief Building and Code Inspector or Director of Public Works, and the local, state and federal agencies having jurisdiction and subject to the requirements of all applicable codes, resolutions and laws. See § 51.132 of this code.
(D) In the event of an accidental spill or unavoidable loss to the drains of any deleterious materials, the owner shall promptly notify the Director of Public Works of the nature of the spill, the quantity and time of occurrence.
(Prior Code, § 51.115) (Ord. 03-39, passed 11-17-2003) Penalty, see § 51.999
(A) No person shall install and operate any garbage shredder equipped with a motor of three-fourths horsepower (seventy-six hundredths metric) or greater in size.
(B) No commercial/industrial establishment shall install any garbage shredder or replace an existing garbage shredder.
(C) All garbage shredders shall shred the waste to a degree that all particles will be carried freely under normal flow conditions prevailing in the public sewer system. Garbage shredders shall not be used for grinding plastic, paper products, inert materials or garden refuse.
(Prior Code, § 51.116) Penalty, see § 51.999
Grease, oil and sand interceptors or traps shall be provided by the owner when, in the opinion of the Director of Public Works, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, sand or other harmful ingredients; except that interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the Chief Building and Code Inspector or Director of Public Works and shall be located as to be readily and easily accessible for cleaning and inspection.
(Prior Code, § 51.117) (Ord. 03-39, passed 11-17-2003) Penalty, see § 51.999
(A) Opening or entering manholes or inlets for any purpose whatever is strictly prohibited, except by persons duly authorized to do so.
(B) No person shall discharge any substance directly into a manhole, inlet or other opening in the public sewers other than through an approved building sewer, unless upon written application to the Director of Public Works and payment of the applicable user charges and fees, and the Director of Public Works issues a permit for such direct discharges.
(Prior Code, § 51.118) Penalty, see § 51.999
INDUSTRIAL WASTES AND DISCHARGE PERMITS
All major contributing industries proposing to directly or indirectly connect to or discharge wastes into the sanitary sewers shall obtain a state indirect discharge (SID) permit from the state before connecting to or discharging into these sewers.
(Prior Code, § 51.130) Penalty, see § 51.999
Persons proposing to or who actually discharge industrial wastes which contain none of the prohibited ingredients or characteristics set forth in §§ 51.110 through 51.118 of this code, other than excessive concentrations of BOD5, suspended solids and grease, hydrogen sulfide or ammonia shall be required to pretreat their wastes to meet the requirements of normal strength wastewater with the exception that wastes may be accepted for treatment if all the following requirements are met:
(A) The wastes will not cause damage to the sanitary sewer system;
(B) The wastes will not impair the wastewater treatment process; and
(C) The discharger of the waste agrees to pay a surcharge over and above the published sewer rates when the waste strength exceeds that of normal strength wastewater.
(Prior Code, § 51.131) Penalty, see § 51.999
(A) When the City Engineer or Director of Public Works determines that any industrial waste will be harmful to the structures, treatment processes or operation of the wastewater treatment works, or detrimental to the wastewater treatment facility effluent, the person discharging the waste shall provide, at the person’s own expense, preliminary treatment or processing facilities as may be determined by the Director of Public Works as necessary to make the waste acceptable for admission to the public sanitary sewers.
(B) When the City Engineer or Director of Public Works determines that an industrial waste must be pretreated, the owner shall submit plans and specifications of the proposed pretreatment facilities to the City Engineer or Director of Public Works for review. After the plans and specifications are reviewed as approved, the owner shall proceed to provide pretreatment facilities. If the pretreatment facilities are completed according to the plans and specifications, and the owner provides a proper sewer connection permit from the plant to the sanitary sewers, the Nebraska Department of Environment and Energy will issue the owner an industrial waste discharge permit authorizing such connection and permitting the owner to discharge waste into the sanitary sewers at the rate and in the quantity stated in the permit. The owner, at the owner’s expense, shall maintain these pretreatment facilities continuously in satisfactory and effective operation.
(Prior Code, § 51.132) (Ord. 03-39, passed 11-17-2003) Penalty, see § 51.999
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