A. Any liquid or vapor having temperature higher than one hundred fifty degrees Fahrenheit;

B. Any water or waste which contains more than one hundred parts per million by weight of fat, oil or grease;

C. Any gasoline, benzene, naphtha, oil, or other flammable or explosive liquid, solid or gas;

D. Any garbage that has not been properly shredded;

E. Any ashes, cinders, sand, mud, straw, hair, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure, or any other solid or viscous substances capable of causing an obstruction to the flow of sewers or other interference with the proper operation of the sewage works;

F. Any waters or wastes having a pH lower than five and five-tenths, or higher than eight and five-tenths, or having any other corrosive property capable of causing damage or hazard to structures, equipment or personnel of the sewage works;

G. Any waters or wastes containing a toxic or poisonous substance in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans, animals, fish or fowl, or create any hazard in the receiving waters of the sewage treatment plant;

H. Any waters or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials at the sewage treatment plant;

I. Any obnoxious or malodorous gas or substance capable of creating a public nuisance;

J. Any hazardous material, unless prior approval is obtained from the City Engineer. (Ord. 1374 § 3, 1987: Ord. 208 § 31, 1957).