No person shall discharge or cause to be discharged any storm water, surface water, ground water, roof runoff, subsurface drainage, uncontaminated cooling water or unpolluted industrial process waters to the city sanitary sewer.
No person shall discharge or cause to be discharged any of the following described 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 in 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 sewers, structures, equipment and personnel or the sewage works.
(D) 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.
(E) Grease, oil, sand interceptors and other treatment devices shall be provided when, in the opinion of the city council, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, organic materials in excessive amounts, or any flammable wastes, sand or other harmful ingredients; except that such interceptors or treatment devices shall not be required for private living quarters or dwelling units. All interceptors or treatment devices shall be of a type and capacity approved by the city council and shall be located as to be readily and easily accessible for cleaning and inspection.
Where preliminary treatment or flow equalizing facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense. (Ord. 697, 10-19-1981)