No person shall discharge or cause to be discharged any of the following waters or wastes to any public sewers:
   (A)   Any gasoline, benzene, naphtha, fuel oil or other flammable or explosive liquid, solid or gas;
   (B)   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;
   (C)   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; and
   (D)   Solid or viscous substances in quantities or of such size as are 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, paper dishes, cups, milk containers and the like, whether whole or ground by garbage grinders.
(1989 Code, § 51.61)  (Ord. 6-1974, passed 7-15-1974)  Penalty, see § 51.999