§ 12.12.060. Pretreatment standards and requirements.

A.

No person shall discharge or cause to be discharged to the POTW, directly or indirectly, any unpolluted waters such as stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, or noncontact cooling water, and unpolluted industrial wastewater to any sewer or natural outlet, unless approved by the Public Works Director and other regulatory agencies whose approval is required by law.

B.

No person shall discharge or cause to be discharged to the POTW, directly or indirectly, any pollutant or wastewater which will cause interference or pass through. Furthermore, no discharger shall discharge or cause to be discharged to the POTW, directly or indirectly, any of the following described substances unless prior written approval has been obtained from the public works director:

1.

Any liquids, solids, or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction to cause fire or explosion or to be injurious in any other way to the operation of the POTW, including, but not limited to, wastestreams with a closed cup flashpoint of less than one hundred forty (140) degrees Fahrenheit or sixty (60) degrees Centigrade using the test methods specified in 40 CFR 261.21. At no time shall two successive readings on a combustible gas meter, at the point of discharge into the system (or at any point in the system), be over five percent, nor any single reading over ten (10) percent of the lower explosive limit (LEL) of the meter. Prohibited materials include, but are not limited to, gasoline, fuel oil, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and any other substances which are a fire hazard or hazard to the POTW.

2.

Solid or viscous substances in quantities or of such size that they will or may cause reduction of the effective cross-sectional area of a sewer, obstruction to the flow in a sewer, or other interference with the operation of the POTW. In no case may solids greater than one-fourth (¼) inch in any dimension be discharged to the POTW.

3.

Any wastewater having a pH less than 5.5 or higher than 10.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment, or personnel of the system.

4.

Any wastewater having a BOD of more than three hundred (300) mg/L.

5.

Any wastewater having a suspended solids content of more than three hundred (300) mg/L.

6.

Any wastewater having a chlorine demand of more than twenty (20) mg/L.

7.

Any wastewater having an animal/vegetable (polar) based floatable oil, fat waste, oil, or grease (whether or not emulsified), hexane or ether-soluble matter content in excess of one hundred (100) mg/L; or a mineral/petroleum (non-polar) based oil or grease (whether or not emulsified), hexane or ether-soluble matter content in excess of one hundred (100) mg/L; or any petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through; or any substance which may solidify or become discernibly viscous at temperatures above zero degrees Centigrade (0 degree C)(32 degrees F).

8.

Any wastewater containing pollutants in sufficient quantity or concentration, either singly or by interaction, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, or to exceed the limitation set forth in categorical pretreatment standards, or state or local standards.

9.

Any pollutants which result in the presence of toxic, noxious or malodorous liquids, gases, vapors, fumes, or solids within the POTW in a quantity that which either singly or by interaction are capable of creating a public nuisance or hazard to life or causing acute worker health and safety problems, or are sufficient to prevent entry into the sewers for their maintenance and repair.

10.

Any substance which may cause the POTW's effluent or treatment residues, biosolids, or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case shall a substance be discharged to the POTW that, either alone or in combination with other discharges, will cause the POTW to be in noncompliance with biosolids use or disposal criteria, guidelines or regulations developed under section 405 of the Act; or with any criteria, guidelines, or regulations affecting biosolids use or disposal developed pursuant to the Solid Waste Disposal Act, 42 U.S.C. 6901 et seq., as now or as it may be amended, the Clean Air Act, 42 U.S.C. 7401 et seq., as now or as it may be amended, the Toxic Substances Control Act (TSCA), 15 U.S.C. 2601 et seq., as now or as it may be amended, or similar state statutes or regulations applicable to the biosolids management method being used.

11.

Any substance which will cause the POTW to violate the Regional WWTP NPDES and/or other disposal system permits.

12.

Any wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts color to the treatment plant's effluent thereby violating the regional WWTP NPDES permit. Color, alone or in combination with turbidity, shall not cause the treatment plant effluent to reduce the depth of the compensation point for photosynthetic activity by more than ten (10) percent from the seasonably established norm for aquatic life.

13.

Any slugload.

14.

Any sludges, screenings, or other residues from the pretreatment of industrial wastewater discharges.

15.

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

16.

Any wastewater which causes a hazard to human life or creates a public nuisance.

17.

Any medical wastes.

18.

Any wastewater causing the treatment plant's effluent to fail a toxicity test.

19.

Any wastes containing detergents, surface active agents, or other substances in such concentrations that they may cause excessive foaming in the POTW.

20.

Persistent pesticides and/or pesticides regulated by the Federal Insecticide Fungicide Rodenticide Act (FIFRA), 7 U.S.C. 136 et seq., as now or as it may be amended.

C.

No discharger shall discharge or cause to be discharged to the POTW, directly or indirectly, any of the following described substances unless discharged pursuant to a valid wastewater discharge permit:

1.

Any wastewater with a temperature which will inhibit biological activity in the POTW treatment plant resulting in interference; but in no case, wastewater with a temperature at the introduction into the POTW which exceeds forty degrees Centigrade (40 degrees C) (104 degrees F).

2.

Any trucked or hauled pollutants, except pursuant to section 12.12.420.

3.

Any dangerous wastes as defined in chapter 173-303 of the Washington Administrative Code (WAC), as now or as it may be amended.

4.

Flows which have the potential to adversely affect the hydraulic loading of the POTW, including the following categories:

a.

Noncontact cooling water;

b.

Stormwater and other direct inflow sources; and

c.

Nonpolluted water or water which does not require significant treatment.

D.

Wastes prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW. All floor drains located in process or materials storage areas must discharge to the industrial discharger's pretreatment facility prior to discharging to the POTW.

E.

The general and specific prohibitions provided by this section apply to all dischargers to the POTW whether or not the discharger is subject to categorical pretreatment standards or requirements.

(Ord. 2565 § 1 (part), 2008; Ord. No. 2717, § 1, 4-11-11)