A. 
If any waters or wastes are discharged or are proposed to be discharged to the sewerage system or sewers tributary thereto, which waters or wastes in the judgment of the Department of Public Works or its duly authorized agent, may have a deleterious effect upon said system or sewers, processes, equipment or receiving waters, or may otherwise create a hazard to life or constitute a public nuisance, or may exceed the concentration limits prescribed for normal sewage, the Department of Public Works or its duly authorized agent may:
(1) 
Reject the waters or wastes;
(2) 
Require pretreatment to an acceptable condition for discharge to the 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 waters or wastes not covered by existing charges or sewer rents;
(5) 
Certified tests of industrial wastewater may be required periodically by the Department of Public Works or its duly authorized agent.
B. 
The discharge of waters or wastes requiring pretreatment, flow control or additional treatment will not be permitted into the sewerage system or sewers tributary thereto without previous approval by permit as prescribed under Article IB.
The following activities and/or industries shall require approval by permit before discharging wastewater into public sewers: tanning, metal pickling, metal plating, galvanizing, pulp and paper making, brewing, distilling, public laundering, laundromats, soap making, glue manufacturing, meat and poultry packing, food processing, wool scouring, bleaching and dyeing, munitions manufacturing, oil refining, wool washing, rubber production, salt works, chemical manufacturing, pharmaceutical manufacturing, slaughtering, dairies, dairy products, sugar refining, fat rendering, manufacture of syrups, jam or jelly, cotton textile manufacture or processing, or any activity or industry producing wastes which may have or may create deleterious effects, hazards, nuisances, or added costs. The process or processes employed in the pretreatment and control, if required, of such wastewater shall in each case be satisfactory to and shall have the approval by permit of the Department of Public Works or its duly authorized agent as set forth under Article IB. No permit required pursuant to this section shall be arbitrarily denied.
No person shall discharge or cause to be discharged into the sewerage system or sewers tributary thereto, any of the following materials, substances or wastes:
A. 
Any liquids, solids or gases which by reason of their nature or quantity are or may be sufficient, either alone or by interaction with other substances, to cause fire or explosion or be injurious in any other way to the POTW or to the operation of the POTW. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the system (or at any point in the system), be more than 5% nor any single reading over 10% of the lower explosive limit (LEL) of the meter. Prohibited material include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides and any other substances which are a fire hazard or a hazard to the system.
B. 
Any wastewater having a pH less than 5.0 or greater than 12.0, unless the POTW is specifically designed to accommodate such wastewater, or wastewater having any other corrosive property capable of causing damage or hazard to sewers, structures, equipment or personnel.
C. 
Solid or viscous substances, in quantities or of such size or state, which may impair the hydraulic capacity, may cause maintenance difficulties, or may interfere with the proper operation of the sewerage system and sewers tributary hereto, such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, tar, plastics, wood, whole blood, paunch manure, feathers, hair and fleshings, entrails, paper dishes, cups, milk containers, etc., either whole or macerated.
D. 
Any liquid or vapor having a temperature higher than 150° F. (65° C.) or in such quantities that the temperature at the treatment works influent exceed 104° F. (40° C.). If, in the opinion of the Department of Public Works or its duly authorized agent, lower temperatures of such wastes could harm either the sewers, sewage treatment process, or equipment, have an adverse effect on the receiving stream, or could otherwise endanger life, health or property, or constitute or contribute to a nuisance, the Department of Public Works or its duly authorized agent may prohibit such discharges.
E. 
Waters or wastes containing substances which are not amenable to treatment or reduction by the POTW processes employed, or are amenable to treatment only to such a degree that the POTW effluent cannot meet the requirements of regulatory agencies having jurisdiction over discharge to the receiving waters.
F. 
Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, to constitute a hazard to humans or animals, to create a toxic effect on the receiving waters of the POTW, or to exceed the limitation set forth in a categorical pretreatment standard.
G. 
Any substance which may cause the POTW's effluent or any other product of the POTW, such as residues, sludges, or sums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case, shall a substance discharged to the POTW cause the POTW to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed under Section 405 of the Federal Water Pollution Control Act; any criteria, guidelines, or regulations affecting sludge use or disposal developed pursuant to the Solid Waste Disposal Act, or state criteria applicable to the sludge management method being used.
A. 
No person shall discharge or cause to be discharged in to the sewerage system or sewers tributary thereto, the following described materials, substances, waters, or wastes if it appears likely in the judgment of the Department of Public Works or its duly authorized agent that such wastes may have a deleterious effect upon the sewer system or sewers tributary thereto, sewage treatment or other processes, equipment, or receiving waters, or may otherwise endanger life, limb, property, or constitute a public nuisance.
B. 
In forming this opinion as to the acceptability of these quantities of subject wastes in relation to flows and velocities in the sewers, materials of construction, POTW processes and capacity, degree of treatability, and other pertinent factors shall be considered.
C. 
The materials, substances, waters and wastes prohibited or restricted are:
(1) 
Any waters or wastes 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 32° F. and 150° F. (0° C. and 65° C.).
(2) 
Any garbage that has not been properly shredded. The installation and operation of garbage grinders equipped with a motor greater than 3/4 horsepower shall be subject to the review and approval of the Department of Public Works or its duly authorized agent. (Not more than 30% of ground garbage, on the dry basis, shall pass a No. 40 U.S. Standard sieve.).
(3) 
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Department of Public Works or its duly authorized agent in compliance with applicable City, county, state or federal regulations.
(4) 
Materials which exert or cause unusual concentration 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.
(5) 
Waters or wastes which exert or cause unusual volume of flow or concentration constituting slugs, as defined herein.
(6) 
Any waters or wastes containing excessive discoloration, concentrations exceeding limits which may be established by the Department of Public Works or its duly authorized agent to meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
(7) 
Any noxious malodorous liquids, gases, or solids which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for maintenance and repair.
(8) 
Any substance which will cause the POTW to violate its SPDES permit or the receiving water quality standards.
(9) 
Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions.
(10) 
Any waters or waste from a motor vehicle, tank truck or any other mobile conveyance without prior written authorization by the Department of Public Works or its duly authorized agent, specifying the nature, volume, manner, time and place of discharge.
D. 
When the Department of Public Works or its duly authorized agent determines that a user(s) is contributing to the POTW any of the above-enumerated substances in such amounts as to interfere with the operation of the POTW, the Department of Public Works or its duly authorized agent shall: advise the user(s) of the impact of the contribution on the POTW; and develop effluent limitation(s) for such user to correct the interference with the POTW.
A. 
No person shall discharge or cause to be discharged into the sewerage system or sewers tributary thereto, any water or wastes containing toxic, poisonous, or other solids, liquids, or gases in sufficient quantity in the judgment of the Department of Public Works or its duly authorized agent, either singly or by interaction with other processes, equipment, or receiving waters, to endanger life, limb, property, or to constitute a public nuisance.
B. 
The following is a partial list of such prohibited or restricted substances:
(1) 
Alcohols.
(2) 
Antibiotics.
(3) 
Arsenic and arsenicals.
(4) 
Bromine, iodine, chlorine.
(5) 
Copper and copper salts.
(6) 
Cresols and creosotes.
(7) 
Flourides.
(8) 
Formaldehyde.
(9) 
Mercury and mercurials.
(10) 
Phenolic compounds.
(11) 
Silver and silver compounds.
(12) 
Sulfonamides, toxic dyes (organic or mineral).
(13) 
Zinc compounds.
(14) 
All strong oxidizing agents, such as chromates, dichromates, permargamates, peroxides, etc.
(15) 
Chemical compounds producing toxic, flammable or explosive gases, either upon acidification, alkalization, oxidation or reduction.
(16) 
Strong reducing agents, such as nitrates, sulphides, sulphites, thiosulphates, etc.
(17) 
Wastes from industrial processes or hospital procedures containing viable pathogenic organisms.
C. 
Until operating experience and knowledge indicate otherwise in the judgment of the Department of Public Works or its duly authorized agent, the tabulated maximum concentrations are established for the following substances at discharge to public sewers and at the influent to the POTW.
Maximum Concentration
(milligrams per liter)
Substance
At Distance to Public Sewers
Bromine, iodine, chlorine
100.0
Cadmium
5.0
Chromium hexavalent
5.0
Copper
3.0
Cyanate
10.0
Cyanide
1.0
Flouride
10.0
Lead as Pb
5.0
Mercuric chloride
1.0
Nickel
5.0
Silver
0.05
Zinc
5.0
Zirconium
10.0
D. 
Discharge concentrations shall be determined from a twenty-four-hour composite sample collected from the building service sewer at a point prior to connection to the City's collector sewers. Users with multiple discharge outfalls shall not combine wastewater streams unless approved by the Department of Public Works or its duly authorized agent.
E. 
The Department of Public Works or its duly authorized agent may impose lower concentrations at the point of discharge to the public sewers where maximum concentrations at the plant influent are exceeded.
Upon the promulgation of the federal categorical pretreatment standards for a particular industrial subcategory, the federal standard, if more stringent than the limitation imposed under this Part 1 for sources in that subcategory, shall immediately supersede the limitations imposed under this Part 1. The Department of Public Works or its duly authorized agent shall notify all affected users of the applicable reporting requirements under 40 CFR 403.12.
No user shall increase the use of process water or in any way attempt to dilute a discharge as a partial or complete substitute for adequate pretreatment to achieve compliance with the standards, or any pollutant specific limitation by the county sewer district or state.