[Code 1975, § 19-4(a), (b)]
(a)
No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers or drains:
(1)
Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.
(2)
Any pollutants, including, without limitation, oxygen demanding pollutants, either singly or by interaction with other wastes, in sufficient quantity to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a public nuisance, or are not susceptible to treatment or which may interfere with the biological processes or efficiency of the treatment system, or that will pass through the system or create any hazard in the receiving waters of the wastewater treatment plant or causing any other interference.
(3)
Any acidic waters or wastes having a pH lower than 5.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the wastewater works. Prohibited materials include, but are not limited to, acids, sulfides, concentrated chloride and fluoride compounds and substances which will react with water to form acidic products.
(4)
Solid or vicious substances in quantities or of such size as would be capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the wastewater 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, and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders, unless approved in writing by the Director.
(5)
Any liquid or vapor having a temperature higher than 140° F. (60° C.); provided, that such discharges do not result in a temperature at the plant influent greater than 104° F. (40° C.). In such cases where the 104° F. (40° C.) influent criterion is violated, the temperature of the wastewater from the industrial user shall be lowered to a point that will be determined by the Director.
[Amended 10-5-2010 by Ord. No. 2010.100]
(6)
National categorical pretreatment standards as promulgated by the U.S. Environmental Protection Agency (EPA) pursuant to the act shall be met by all dischargers. An application for modification of the national categorical pretreatment standards may be considered for submittal to the regional administrator by the City when the City's wastewater treatment system achieves consistent removal of the pollutants as defined by 40 CFR 403.7.
(b)
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 Director that such wastes can harm either the sewers, wastewater treatment process or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, or public property, or constitute a nuisance. In forming his opinion as to the acceptability of these wastes, the Director 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 plant, degree of treatability of wastes in the wastewater treatment plant, and other pertinent factors. The substances prohibited are:
(1)
Any water or waste containing fats, wax, grease or oils, whether emulsified or not, in excess of 200 milligrams per liter (mg/1) or containing substances which may solidify or become viscous at temperatures between 32° and 140° F. (0° and 60° C.).
[Amended 10-5-2010 by Ord. No. 2010.100
(2)
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 horsepower metric) or greater shall be subject to the review and approval of the Director.
(3)
Any waters or wastes containing strong acid, iron pickling wastes or concentrated plating solutions, whether neutralized or not.
(4)
Any waters or wastes containing phenols or other taste- or odor-producing substances, in such concentrations exceeding local limits as published by the Director and as may be amended, or as established to meet the requirements of the state, federal or other public agencies or jurisdictions for such discharge to the receiving waters.
[Amended 10-5-2010 by Ord. No. 2010.100]
(5)
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Director in compliance with applicable state or federal regulations.
(6)
Any alkaline waters or wastes having a pH in excess of 9.0.
(7)
Materials which exert or cause:
a.
Unusual concentrations of inert suspended solids, such as, but not limited to, fuller's earth, lime slurries and lime residues, or of dissolved solids (such as, but not limited to, sodium chloride and sodium sulfate).
[Amended 10-5-2010 by Ord. No. 2010.100]
b.
Color or turbidity in such an amount that it will prevent the City from discharging a treated effluent in compliance with the water quality standards.
c.
Unusual BOD, chemical oxygen demand or chlorine requirements in such quantities as to constitute a significant load on the wastewater treatment plant.
d.
Unusual volume of flow or concentration of wastes constituting slugs.
(8)
Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment plant 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.
(9)
Septic tank solids that are not diluted sufficiently to assure that all particles will be carried freely under all flow conditions in the wastewater facilities.
(10)
Any waters containing metals such as, but not limited to, iron, chromium, copper and zinc, and similar hazardous or toxic substances to such degree that any such material received in the composite wastewater at the wastewater treatment plant exceeds the local limits established by the Director for such material.
[Amended 10-5-2010 by Ord. No. 2010.100]
(11)
Any waters containing organic compounds such as volatile organics, semivolatile organics, pesticides and similar hazardous or toxic substances to such a degree that any such material received in the composite wastewater at the wastewater treatment plant exceeds the limits established by the Director for such materials.
(12)
Any noxious or malodorous liquids, gases or solids which, either singly or by interaction, are capable of creating a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for their maintenance and repair.
(13)
Any substance which may cause the City's wastewater facilities effluent or residues, sludges or scums to be unsuitable for reclamation and reuse or to interfere with the reclamation process.
(14)
Any substance which will cause the City wastewater facility to violate its NPDES permit and/or state waste discharge license certificate.
(15)
Any substance with objectionable color not removed in the wastewater treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions.
(16)
Any wastewater which causes a hazard to human life or creates a public nuisance.