Except as hereinafter provided, no person shall discharge into the public sewers:
   (A)   Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas which may, by themselves or by interaction with other substances, cause injury to persons, property, or the operation of the city sewerage system;
   (B)   Any water or wastes containing toxic or poisonous solids, liquids, or gasses 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 (CN) in excess of two milligrams per liter as CN in the wastes as discharged to the public sewer;
   (C)   Any waters or wastes having a pH of lower than 5.5 or having any other corrosive properties capable of causing damage or hazard to structures, equipment, and personnel of the sewage works;
   (D)   Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewer 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, or other materials; and
   (E)   Materials from cesspools and septic tanks, other than effluent, except that materials from cesspools and septic tanks pumped within the boundaries of the sanitary city may be dumped into the sewage system if prior application and approval is obtained from the secretary.
(Ord. 46, passed 4-8-1975) Penalty, see § 52.999