A. 
No person shall discharge any waste, or cause or allow any waste to be discharged, into the city sewer system or any connected system unless it is in accordance with this chapter.
B. 
No person shall discharge, or cause or allow to be discharged into the city sewer system or any connected system, any waste which contains any of the following:
(1) 
Liquids, solids or gases which by reason of their nature or quantity are or, in the opinion of the city, may be sufficient to cause fire or explosion or be injurious in any other way to the city sewer system or to the operation of the system.
(2) 
Any waters or wastes having or exhibiting any corrosive property which, either singly or by interaction with other wastes, are or in the opinion of the city may be capable of causing damage or hazard to structures, equipment and personnel of the city sewer system, but in no case discharge with a pH less than six point zero (6.0).
(3) 
Solid or viscous substances in such quantities or of such size as to be capable of causing obstruction to the flow in a sewer, or other interference with the proper operation of any connected system, such as, but not limited to, grease, uncomminuted food wastes, animal entrails or tissues, paunch manure, bones, hair, hides or fleshings, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, wastepaper, wood, plastics, rubber stoppers, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, gasoline, naphtha and similar substances, either whole or ground.
(4) 
Any waters or wastes containing toxic, noxious or malodorous solids, liquids or gases, which, either singly or by interaction with other wastes, are capable of creating a public nuisance or hazard to human or animal life, are or may be sufficient to prevent entry into a sewer for its maintenance, inspection or repair or interfere with any sewage treatment process or create any hazard in the receiving waters of the sewage treatment plant, including but not limited to, cyanides in excess of eight-tenths (0.8) milligram per liter as CN in the wastes as discharged to the city sewer system.
(5) 
Wastes from septic tanks or other similar facilities or wastes emanating from locations outside the city sewer service area shall not be discharged into the city sewer system or any connected system without previous written approval of the city. Such discharges shall only be made at a site approved by the city.
(6) 
Any unpolluted waters, such as stormwater, surface water, groundwater, roof runoff, subsurface drainage, uncontaminated cooling water or unpolluted industrial process waters, shall not be discharged into the city sewer system unless such discharge has been approved by the city.
C. 
No person shall discharge or cause to be discharged into the city sewer system or any connected system the following described substances, materials or wastes if it appears likely, in the opinion of the city, 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 an opinion as to the acceptability of these wastes, the city 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 transmission facilities, degrees of treatability of wastes in the sewage treatment plant and other pertinent factors. The prohibited substances are:
(1) 
Any liquid or vapor having a temperature higher than one hundred four degrees Fahrenheit (104º F.) [forty degrees Celsius (40º C.)], except where higher temperatures are required by law.
(2) 
Any water or waste containing fats, wax, grease or oils, whether emulsified or not, in excess of fifty (50) milligrams per liter or containing substances which may solidify or become viscous at temperatures between thirty-two and one hundred four degrees Fahrenheit (32º and 104º F.) [zero and forty degrees Celsius (0º and 40º C.)].
(3) 
Food waste that has not been ground or communited to such a degree that all particles will be carried freely in suspension under flow conditions normally prevailing in public sewers with no particle greater than one-half (1/2) inch in any dimension. At no time shall the concentration of properly ground food waste exceed a level that would prevent the treatment plants from maintaining the required efficiency or cause operational difficulties.
(4) 
Any waters or wastes containing strong acids, iron pickling wastes or concentrated plating solutions.
(5) 
Any waters or wastes containing concentrations in excess of or outside the stated range of the following:
Parameter
Concentration
(mg/l)
Arsenic
0.1
Barium
1.0
Boron
1.0
Cadmium
0.2
Chromium (total)
2.0
Chromium (trivalent)
1.0
Chromium (hexavalent)
1.0
Copper
1.0
Cyanide
0.8
Iron
5.0
Lead
0.1
Manganese
1.0
Mercury
0.1
Nickel
1.0
Phenolics
0.1
Selenium
0.05
Silver
0.05
Sulfide
50.0
Zinc
0.08
pH
6.0 to 8.0
(6) 
Any waters or wastes exerting an excessive chlorine requirement to such degree that any such material received in the composite sewage at the sewage treatment plant exceeds the limits established by the city for such material.
(7) 
Any waters or wastes containing toxic, poisonous substances, chemical elements or compounds, phenols or other taste- or odor-producing substances, or any other substances which may interfere with the biological processes or efficiency of the treatment plants, or that will pass through a treatment plant and cause the effluent therefrom or the water or groundwater into which it is discharged to fail to meet applicable state or federal standards.
(8) 
Radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by regulations issued by the appropriate authority having control over their use and which will or may cause damage or hazards to the city sewer system or personnel operating it.
(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 or printing wastes and vegetable tanning solutions).
(c) 
Unusual suspended solids, biochemical oxygen demand, chemical oxygen demand or chlorine requirements in such quantities as to constitute a significant load on, or shock to, the sewage treatment works.
(d) 
Unusual volume of flow or concentration of wastes constituting slugs as defined herein.
(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 city sewer system or any connected system, which waters contain the substances or possess the characteristics enumerated in Subsections B and C of this section and which, in the judgment of the city, 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 may:
(1) 
Reject the wastes; or
(2) 
Require pretreatment, handling facilities or flow equalization to reduce or eliminate the objectionable characteristics or substances so that the discharge will not violate these rules and regulations; and/or
(3) 
Require payment to cover the added cost of handling and treating excess loads imposed on the city sewer system by such discharge. These special surcharges will be approved by the Commission and will be computed as further defined herein. If the city permits pretreatment or equalization of waste flows prior to discharge into any part of the city sewer system or any connected system, the plans, specifications and other pertinent data or information relating to such pretreatment or flow-control facilities shall be subject to the review and approvals of the city. Approval shall in no way exempt the discharge of such facilities from compliance with any applicable code, ordinance or law. Any subsequent alterations or additions to such pretreatment or flow-control facilities shall not be made without due notice to, and approval of, the city.
E. 
Grease, oil and sand interceptors shall be provided when, in the opinion of the city, they are necessary for the proper handling of liquid wastes containing excessive amounts of grease, flammable substances, sand or other harmful ingredients, except that such interceptors shall not be required for private homes or dwelling units. All installations shall be of a type and capacity specified by the city building codes and shall be regularly cleaned and maintained for adequate performance. All food service facilities are required to comply with the provisions of Chapter 112, the grease management program
[Amended 3-10-2009 by Ord. No. 2009-01]
F. 
Where preliminary treatment or flow equalization facilities are required to comply with Subsection D of this section or with federal pretreatment standards and any other requirements promulgated by the United States Environmental Protection Agency in accordance with Section 307 of the Federal Clean Water Act, such facilities shall be effectively operated and maintained continuously by the owner at his expense, subject to the requirements of this chapter and all other applicable rules, regulations, codes, ordinances and laws.
G. 
Where required by the city, any establishment discharging industrial waste or waste, which in the opinion of the city is questionable or objectionable, into the city sewer system or any connected system shall provide and maintain at no expense to the city, a suitable point or points of access, together with such necessary meters and other appurtenances, at an appropriate location to permit observation, measurement and sampling of such waste by the city. Plans for such sampling points and measuring equipment shall be subject to approval by the city prior to construction and installation of the facility. Sampling and measuring facilities shall be located in such a manner as to provide safe access for inspection and verification of their operating condition. When required by the city, the owner of any property served by a building sewer carrying industrial wastes or wastes which in the opinion of the city are undesirable shall install a suitable control manhole 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 city. 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. 
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 by testing suitable samples taken at an appropriate sampling point. In the event that no special facility has been required, the sampling facility 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 acceptable 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 all premise is appropriate or whether a grab sample should be taken. Normally, but not always, biochemical oxygen demand and suspended solids analysis are obtained from twenty-four-hour composites of all outfalls, whereas pH determinations are from periodic grab samples.
I. 
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 rules and regulations of the appropriate regulatory agencies. Industrial users of the city sewer system or any connected system, which are subject to federal pretreatment standards contained in 40 CFR Part 403, shall submit annual reports to the city identifying the constituents and describing the characteristics of the industrial wastewater being discharged into the sanitary sewerage system. In order to ensure the integrity of the industrial waste reports submitted to the city, said industrial users of the city sewer system or any connected system shall:
(1) 
Maintain continuous records concerning volume, constituents and characteristics of the industrial waste discharge.
(2) 
Install, use and maintain monitoring and sampling equipment approved by the city for determining volume, constituents and characteristics of the industrial waste discharge, if required by federal pretreatment standards.
J. 
All such records and equipment used to determine and record volume, constituents and characteristics of industrial waste discharges shall be made available for review and inspections by the city and authorized representatives of the State Department of Environmental Regulations and the United States Environmental Protection Agency.
K. 
Whenever it shall be necessary for the purpose of these rules and regulations, the city or its duly authorized representative may enter upon any property for the purpose of obtaining information or conducting surveys or investigations. Entry shall be made during daylight or operating hours unless abnormal or emergency circumstances require otherwise.
L. 
Accidental discharges of prohibited waste into the city sewer system, directly or through any connected system or place from which such waste may enter the city sewer system, shall be promptly reported to the city by the person responsible for the discharge, or by the owner or occupant of the premises where the discharge occurs, upon obtaining knowledge of the occurrence of such a discharge.
M. 
No statement contained in this section shall be construed as preventing any special agreement or arrangement between the city sewer system and any user whereby a waste of unusual strength or character may be accepted by the city sewer system for treatment, subject to payment therefor, by the user.
N. 
In these cases, the city will develop a system of user classifications and charges for use in preparing billings which will be fair and equitable to all users.