[Code 1985 § 27-211; Code 2005 § 110-226]
A. 
No person shall discharge or cause to be discharged any of the following described waters or wastes to any sanitary sewer:
(1) 
Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas.
(2) 
Any waters or wastes containing noxious 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 facility, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of sewage treatment plant effluent.
(3) 
Any waters or wastes having a pH lower than 6.0, or causing the pH of the sewage plant influent to rise above 9.0, or having any other corrosive property capable of causing damage or hazard to processes, structures, equipment and/or personnel of the sewage works.
(4) 
Solid, viscous or liquid substances in quantities or of such size as to cause or be 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 fleshings; entrails; paper products such as dishes, cups, milk containers, etc., either whole or ground by garbage grinders; slops; chemical residues; or bulk solids.
(5) 
Any strong acid, iron pickling wastes or concentrated plating solutions, whether neutralized or not.
(6) 
Any unusual volume of flow or concentration of wastes constituting slugs.
(7) 
Any substance that may pass through the treatment plant without being effectively treated or otherwise reduced to acceptable concentrations by normal treatment methods such that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over the discharge to the receiving waters.
(8) 
Any waste containing, Rheium, Strontium or Tellurium.
(9) 
Any waters or wastes containing substances in excess of the limits established in § 20-72 or that have been diluted solely for the purpose of meeting any concentration limits listed or implied in this section or § 20-72.
(10) 
Any stormwater, surface water, groundwater, roof runoff, subsurface drainage, uncontaminated cooling water or unpolluted industrial process waters.
[Code 1985 § 27-212; Code 2005 § 110-227]
A. 
No person shall discharge or cause to be discharged any of the following described substances, materials, waters or wastes in concentrations, quantities or rates in excess of those listed, except as otherwise provided:
(1) 
Any liquid or vapor having a temperature higher than 150º F. (65º C.), or any substance which causes the temperature of the total sewage plant influent to increase at a rate of 10º or more per hour or a combined total increase of plant influent temperature to 110º F.
(2) 
Any water or waste containing fats, wax, grease or oil, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32º F. and 150º F. (0º C. and 65º C.).
(3) 
Any garbage that has not been properly shredded. The installation and operation of any garbage shredder equipped with a motor of three-fourths horsepower (0.76 hp metric) or greater shall be subject to review and approval of the city manager.
(4) 
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits to be established by the city manager on a case-by-case basis in compliance with and after consultation with the appropriate regulatory agencies.
(5) 
Any substance with a BOD or SS concentration in excess of 300 mg/l, except that, upon receipt of a written application and establishment of appropriate charges, the city manager may, if the sewage works has sufficient unused or uncommitted capacity, authorize the discharge of wastes containing BOD and/or SS concentrations in excess of 300 mg/l each.
(6) 
Any waters or wastes with total dissolved solids concentrations greater than 300 mg/l plus the dissolved solids in the city water supply.
(7) 
Any waters or wastes containing excessive discoloration or causing excess discoloration of the effluent, including but not limited to dye wastes and vegetable tanning solutions.
(8) 
Any toxic materials that have been diluted in lieu of treatment and removal of intoxicants.
(9) 
Any waters, wastes or other substances containing one or more of the following constituents in excess of the concentrations listed:
 
Average for 30 Connective Days
(mg/l)
Maximum For Any One Day
(mg/l)
Antimony
0.01
 
Boron
1.0
 
Cadmium
0.5
1.0
Chromium-Hexavalent
1.0
 
Chromium-Total
5.0
 
Copper
1.0
 
Cyanide
1.0
 
Lead
0.4
0.8
Mercury
0.002
 
Silver
0.3
1.0
Vanadium
10.0
 
Zinc
5.0
 
Phenols
0.1
 
Fluoride
1.5
 
Nickel
1.8
3.6
Arsenic
0.1
 
(10) 
Limitation on elements or compounds not listed will be established and/or limitations for elements or compounds listed will be lowered if necessary to ensure that the effluent of the wastewater treatment plant is in full compliance with legal requirements of county, state or federal agencies.
[Code 1985 § 27-213; Code 2005 § 110-228]
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 §§ 20-71 and 20-72, and which, in the judgment of the city manager, 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 manager 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 this article.
B. 
If the city manger 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 manager and subject to the requirements of all applicable codes, ordinances and laws.
[Code 1985 § 27-214; Code 2005 § 110-229]
A. 
Grease, oil and sand interceptors shall be provided when, in the opinion of the city manager, they are necessary for the proper handling of liquid wastes containing grease in excessive amount, 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 city manager and shall be located as to be readily and easily accessible for cleaning and inspection.
B. 
Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. Grease and oil interceptors shall be of substantial construction, watertight and equipped with easily removable covers which, when bolted in place, shall be gastight and watertight.
C. 
Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his expense, in continuously efficient operation at all times.
[Code 1985 § 27-215; Code 2005 § 110-230]
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.
[Code 1985 § 27-216; Code 2005 § 110-231]
When required by the city manager, the owner of any property serviced by a building sewer carrying industrial waste shall install a suitable control manhole, together with such necessary meters and other appurtenances, 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 manager. 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.
[Code 1985 § 27-217; Code 2005 § 110-232]
No statement contained in this article shall be construed as preventing any special agreement or arrangement between the city and any industrial concern whereby industrial wastes, except those that would be hazardous or would cause an upset of the treatment process or that would interfere with the operation and maintenance of the collection and/or treatment facilities, of unusual strength or character may be accepted by the city for treatment, subject to payment therefor by the industrial concern in accordance with this article.