§ 9.04.200. Prohibited discharges

A.

No person shall discharge or cause to be discharged to any public or private sewer which directly or indirectly connects to the city sewer system any waste or other substance or material into the sewage system which, either alone or by interaction with other substances or material, causes, threatens to cause, or is capable of causing:

1.

Danger to life or safety of any person or to the facilities of the sewage system.

2.

Nuisances such as odors.

3.

Unreasonable collection, treatment or disposal costs.

4.

Interference with the wastewater treatment process.

B.

No person shall discharge or cause to be discharged to any public or private sewer that directly or indirectly connects to the city sewer system any of the following wastes or substances:

1.

Discharge from any plumbing fixture that continuously uses water, such as a urinal.

2.

Rain water, storm runoff, ground water, subsurface runoff, street drainage, surface runoff, yard drainage, or roof run off.

3.

Discharge from evaporative type air coolers, cooling towers, air conditioners or refrigeration units.

4.

Waters or wastes containing toxic or poisonous solids, liquids, or gasses in sufficient quantity, singly or by interaction with other wastes, injure or interfere with any sewage treatment process, constitutes a hazard to humans or animals or creates a public nuisance.

5.

Solids or viscous substances in quantities 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, paper products (dishes and cups, milk containers, etc.) either whole or ground by garbage grinders.

6.

Any household food wastes that are not properly ground or shredded.

7.

Gasoline, benzene, naphtha, fuel oil, motor oil, or other flammable or explosive liquid, solid, or gas.

8.

Any liquid having a temperature higher than 60 degrees Celsius.

9.

Waters or wastes having pH lower than 5.5 or higher than 9.5, or having any other corrosive property capable of causing danger or hazard to structures and personnel of the sewage works.

C.

No person shall discharge or cause to be discharged to any public or private sewer which directly or indirectly connects to the city sewer system any of the following described wastes without first obtaining a discharge permit issued by the city pursuant to this chapter. The substances prohibited are:

1.

Any water or waste, which contains more than 200 milligram per liter of fat, oil, or grease. The limitation of hexane soluble materials shall not apply to those waste waters from industries processing fats and oils of vegetable or animal origin for which the industry involved supplies at its own expense, satisfactory evidence that (a) the hexane soluble materials are degraded and removed by treatment processes paralleling those used by the city to the same extent that the other organic matter present in normal sanitary sewage is degraded and removed and (b) the hexane soluble materials do not persist through the treatment process in such concentrations that their contribution will be significant in the final effluent, and (c) the waste waters are transportable in the sewers without causing obstructions to flow.

2.

Any toxic or other waste which, in the opinion of the city engineer, may have an adverse or harmful effect on the sewers, maintenance personnel, wastewater treatment plant and equipment, treatment plan effluent quality, public or private property, or may otherwise endanger the public, the local environment, or create a public nuisance.

3.

Waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions whether neutralized or not.

4.

Any waters or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works that will collectively result in a violation of the requirements of the state, federal, or other public agencies having jurisdiction over such discharge.

5.

Any waters or wastes containing phenols or other taste or odor producing substances, in such concentrations exceeding limits which may be established by the superintendent as necessary, after treatment of the composite sewage meet the requirements of the state, federal, or other public agencies having jurisdiction.

6.

Any radioactive wastes or isotopes of such half-life concentration as may exceed limits established by the superintendent in compliance with applicable state or federal regulations.

7.

Unusual concentrations of inert suspended solids (such as, but not limited to Fuller's earth, lime slurries and lime residues) or of dissolved solids (such as, but not limited to, sodium chloride and sodium sulfate) in excess of 1,000 milligrams per liter.

8.

Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).

9.

Unusual volume of flow or concentration of wastes constituting "slugs" as defined herein.

10.

Any continuous discharge of waste into sewers during an eight-hour period when said waste has an average of BOD in excess of 300 milligrams per liter or average COD in excess of 450 milligrams per liter.

11.

Any discharge of waste from a single customer during a 24-hour period, measured from 12:00 a.m., which produces BOD, expressed in terms of pounds, in excess of 58 pounds.

12.

Waters or wastes of such quantities or such qualities that they are not amenable to treatment or reduction by sewage treatment processes employed, or are amenable to treatment or reduction by sewage treatment processes employed, or are amenable to treatment only to such degree that the sewage treatment plan effluent cannot meet the discharge requirements of other governmental agencies having jurisdiction.

The public works superintendent shall reject for treatment all the above enumerated substances, materials, water or wastes unless a permit authorizing said discharge has first been obtained as provided in this chapter and forthwith cause the disconnection from the system of any connection from which said discharge originates until a permit is issued as provided hereunder or the discharger satisfactorily assures the superintendent that said discharge will not be resumed following the reconnection of sewer service. Notice of the proposed disconnection of service shall be given to the customer at least 72 hours prior to the physical cessation of service.