15-421.   UNLAWFUL DISCHARGES.
Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
   (a)   Any liquid or vapor having a temperature higher than 150 degrees Fahrenheit;
   (b)   Any water, wastes or waste which may contain more than 100 mg/1 of fats, wax, grease, or oils, whether emulsified or not, or any substances which may solidify or become viscous at temperatures between 32 degrees Fahrenheit and 150 degrees Fahrenheit (0 degrees and 65 degrees Centigrade).
   (c)   Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid or gas.
   (d)   Garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of 3/4 horsepower (0.76 hp metric) or greater shall be subject to the review and approval of the superintendent.
   (e)   Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure, or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewage works.
   (f)   Any waters or wastes having a pH lower than 5.5 or higher than 9.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the sewage works.
   (g)   Any waters or wastes containing a toxic poisonous substance in sufficient quantity to injury or interfere with any sewage treatment process, constitute a hazard to humans or animals, or create any hazard in the receiving waters of the sewage treatment plant.
   (h)   Any water or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials at the sewage treatment plant or that may degrade the quality of the treated sewage.
   (i)   Any noxious or malodorous gas or substance capable of creating a public nuisance.
   (j)   Any waters or wastes containing toxic or poisonous solids, liquids, or gases in sufficient quantity, either singly or by interaction with other wastes, to injure to interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in the receiving waters of the sewage treatment plant, including but not limited to cyanides in excess of two mg/1 as CN in the wastes as discharged to the public sewer.
   (k)   Any waters or wastes having (1) a five-day BOD greater than 300 parts per million by weight, or (2) containing more than 350 parts per million by weight of suspended solids, (3) having an average daily flow greater than two percent of the average sewage flow of the city, shall be subject to the review of the superintendent. Where necessary in the opinion of the superintendent, the owner shall provide, at his or her expense, such preliminary treatment as may be necessary to (1) reduce the biochemical oxygen demand to 300 parts per million by weight, or (2) reduce the suspended solids to 350 parts per million by weight, or (3) control the quantities and rates of discharge of such waters or wastes. Plans, specifications, and any other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the superintendent and the Division of Sanitation, Kansas State Board of Health, and no construction of such facilities shall be commenced until the approvals are obtained in writing.
   (l)   Any water or wastes containing strong acid iron pickling wastes, or concentrated plating solutions whether neutralized or not.
   (m)   Any waters or wastes containing iron, chromium, copper, zinc, and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the superintendent for such materials.
   (n)   Any waters or wastes containing phenols or other taste- or odor-producing substances, in such concentrations exceeding limits which may be established by the superintendent as necessary, after treatment of the composite sewage, to meet the requirements of state, federal, or other public agencies of jurisdiction for such discharge to the receiving waters.
   (o)   Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the superintendent in compliance with applicable state or federal regulations.
   (p)   Materials which exert or cause:
      (1)   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).
      (2)   Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).
      (3)   Unusual BOD, chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the wastewater treatment works.
      (4)   Unusual volume of flow or concentration of wastes constituting "slugs" as defined herein.
(Ord. 255, Sec. 3)