No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
   1.   Flammable or Explosive Material. Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas.
   2.   Toxic or Poisonous Materials. 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 or 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 (2) milligrams per liter as CN in the wastes as discharged to the public sewer.
   3.   Corrosive Wastes. Any waters or wastes having a pH lower than 5.5 or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the sewage works.
   4.   Solid or Viscous Substances. Solid or viscous substances in quantities or of such size 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 and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
   5.   Excessive B.O.D., Solids or Flow. Any waters or wastes having (a) a five-day biochemical oxygen demand greater than 213 parts per million by weight, or (b) containing more than 235 parts per million by weight of suspended solids, or (c) having an ammonia nitrogen level greater than 30 mg/l, or (d) having a chemical oxygen demand (COD) level greater than 300 mg/l, or (e) total organic carbon (TOC) level greater than 140 mg/l or (f) total kjeldahl nitrogen (TKN) level greater than 30 mg/l, or (g) total fats, /oil and grease (FOG) level greater than 100 mg/l, or (h) 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 the owner's expense, such preliminary treatment as may be necessary to (a) reduce the biochemical oxygen demand to 213 parts per million by weight, or (b) reduce the suspended solids to 235 parts per million by weight, or (c) reduce the ammonia nitrogen level to 30 mg/l, (d) reduce the COD level to 300 mg/l, (e) or reduce the TOC level to 140 mg/l, or (f) reduce the TKN level to 30 mg/l, or (g) reduce total FOG to 100 mg/l, or (h) 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 Building Official, and no construction of such facilities shall be commenced until said approvals are obtained in writing.
(Ord. 2023-28 – Jan. 24 Supp.)