§ 15-5. Requirements for sewage disposal into sewage system; prohibited materials and substances.

No person shall discharge or cause to be discharged into the sanitary sewer system of the city any of the following materials, wastes or waters:

(a)

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

(b)

Any waters or waste which contain grease, oil, or other hydrocarbon substances which will become discernibly viscous or objectionable at temperatures between thirty-two degrees and one hundred fifty degrees Fahrenheit.

(c)

Any gasoline, benzene, naphtha, fuel oil, mineral oil or other flammable or explosive liquid, solid or gas.

(d)

Any household garbage that has not been properly comminuted or triturated. All ground garbage shall be capable of passing through a one-half inch mesh screen before being introduced in the sewer system.

(e)

All ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tars, plastics, wood, paunch manure, hair and fleshings, entrails, lime slurry, lime residues, chemical residues, paint residues, unscreened cannery waste, bulk solids, or any other solid or viscous substance capable of causing an obstruction to flow in sewers, or other interference with the proper operation of the sewer system.

(f)

Any waters or waste, acid or alkaline in reaction, having corrosive properties capable of causing damage or hazard to structures, equipment, or personnel. Free acids and alkalies shall be neutralized at all times to within a permissible pH range of 5.5 to 9.0.

(g)

Any waters of nonsewage or nonindustrial waste origin, such as waters from water well developments and storm water, except by special permit issued by the city sewer superintendent.

(h)

Chemicals or enzymes of any kind designed to break down greases and scums in grease traps.

(i)

Any other substances deemed harmful to the collection system or sewage treatment system.

(Ord. No. 251, § 1; Ord. No. 354, §§ 1, 2.)