No person(s) shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
(A) Any liquids, solids and gases which, by reason of their nature or quantity, are, or may be, sufficient either alone or by interaction with other substances to cause fire or explosion or be injurious in any other way to the waste water disposal system or to the operation of the system. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchiorates, bromates, carbides, hydrides and sulfides;
(B) Any waters 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 waste treatment process, constitute a hazard to humans or animals, create a public nuisance, result in a violation of state or federal water quality standards, or create any hazard in the waste water treatment plant or the receiving waters. A toxic pollutant shall include, but not be limited to, any pollutant identified pursuant to § 307(a) of the Clean Water Act;
(C) Any waters or wastes having a pH lower than five, or higher than nine and one-half, or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the waste water facilities. Exceptions may be granted (by the approving authority) for short duration flows where it has been, or can be shown that high or low pH would not cause any significant waste water facilities problems;
(D) Solid or viscous substances in quantities or of the size capable of causing obstruction to the flow in sewers, or other interference with the proper operation of the waste water facilities such as, but not limited to, ashes, bones, cinders, sand, dirt, straw, shavings, metal, glass, rags, feathers, egg shells, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, paper dishes, cups, milk containers and the like, either whole or after passage through garbage grinders; and
(E) Any waste waters or matter that would directly or indirectly result in a violation of the city’s NPDES permit.
(Ord. 201, passed 12-7-1988)