§ 9.12.030. Regulated discharge

Substances: No person shall discharge or cause to be discharged to a public sewer any of the following described substances, materials, waters, or wastes without first obtaining a written permit issued by superintendent pursuant to this chapter. The substances prohibited are:

A.

Any water or waste which contains more than 200 milligrams 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:

1.

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

2.

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

3.

The waste waters are transportable in the sewers without causing obstructions to flow.

B.

Any waters or wastes containing strong acid iron pickling wastes, or concentrate plating solutions whether neutralized or not.

C.

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 requirement of the state, federal, or other public agencies having jurisdiction over such discharge.

D.

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, to meet the requirements of the state, federal, or other public agencies having jurisdiction.

E.

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

F.

Any waters or wastes having a pH in excess of 9.5.

G.

Materials which exert or cause in sewers or sewage treatment plants:

1.

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.

2.

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

3.

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

H.

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.

I.

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.

J.

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 only to such degree that the sewage treatment plan effluent cannot meet the discharge requirements of other governmental agencies having jurisdiction.

The 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.