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A. General Prohibitions. No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other national, state, or local pretreatment standards or requirements (40 CFR 403.5(a) and WAC 173-216-060(2)(b)(i)).

B. Specific Prohibitions. No user shall introduce or cause to be introduced into the POTW the following pollutants in any form (solid, liquid, or gaseous):

1. Any pollutant which either alone or by interaction may create a fire or explosive hazard in the POTW, including, but not limited to, waste streams with a closed-cup flashpoint of less than one hundred forty degrees Fahrenheit (sixty degrees centigrade) using the test methods specified in 40 CFR 261.21 and 403.5(b)(1), or are capable of creating a public nuisance (WAC 173-216-060(2)(b)(ii)).

2. Any pollutant which will cause corrosive structural damage to the POTW, but in no case discharges with a pH less than 5.5 or more than 9.5, or having any other corrosive property capable of causing damage or hazard to structures, equipment, or personnel of the POTW, unless the system is specifically designed to accommodate such discharge and the discharge is authorized by an applicable wastewater discharge permit (40 CFR 403.5(b)(2) and WAC 173-216-060(2)(b)(iv)).

3. Any solid or viscous substances including fats, oils, and greases in amounts which may cause obstruction to the flow to or in a POTW or other interference with the operation of the POTW (40 CFR 403.5(b)(3) and WAC 173-216-060(2)(b)(iii)). Any fat, oil or grease substance in excess of one hundred ppm shall be presumed to cause obstruction.

4. Any discharge of pollutants, including oxygen-demanding pollutants (BOD, etc.), released at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, is sufficient to cause interference with the POTW (40 CFR 403.5(b)(4) and WAC 173-216-060(2)(b)(vi)).

5. Any waste stream having a temperature which will inhibit biological activity in the treatment plant resulting in interference or cause worker health or safety problems in the collection system. In no case shall wastewater be discharged at a temperature which causes the temperature of the influent to the treatment plant to exceed one hundred four degrees Fahrenheit (forty degrees centigrade) unless the system is specifically designed to accommodate such a discharge, and the discharge is authorized by an applicable wastewater discharge permit (40 CFR 403.5(b)(5) and WAC 173-216-060(2)(b)(v)).

6. Any petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through (40 CFR 403.5(b)(6) and WAC 173-216-060(2)(b)(i)).

7. Any pollutants which result in the presence of toxic gases, vapors, or fumes within any portion of the POTW in a quantity that may cause acute worker health and safety problems (40 CFR 403.5(b)(7)) and WAC 173-216-060(b)(ii)).

8. Any trucked or hauled wastes unless authorized by the director and at discharge points designated by the city of Monroe and in compliance with all applicable city of Monroe requirements and during specified hours (40 CFR 403.5(b)(8)).

9. Any noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair (WAC 173-216-060(2)(b)(ii)).

10. Any of the following discharges unless approved by the Department under extraordinary circumstances such as the lack of direct discharge alternatives due to combined sewer service or need to augment sewage flows due to septic conditions (WAC 173-216-060(2)(b)(vii)).

a. Noncontact cooling water in significant volumes;

b. Stormwater and other direct inflow sources; or

c. Wastewaters significantly affecting system hydraulic loading which do not require treatment or would not be afforded a significant degree of treatment by the POTW.

11. Any dangerous or hazardous wastes as defined in Chapter 173-303 WAC, as amended, except as allowed in compliance with that regulation (WAC 173-216-060(1) and 40 CFR Part 261).

12. Any substance which will cause the POTW to violate its NPDES, state waste discharge or other disposal system permits or causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity test.

13. Any substance which may cause the POTW’s effluent or treatment residues, sludges, or scums to be unsuitable for reclamation and reuse or would interfere with the reclamation process or cause the POTW to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed pursuant to the federal, state, or local statutes or regulations applicable to the sludge management method being used.

14. Any discharge which imparts color which cannot be removed by the POTW’s treatment process such as dye wastes and vegetable tanning solutions, which consequently impart color to the treatment plant’s effluent, thereby violating the city of Monroe NPDES permit. Color (in combination with turbidity) shall not cause the treatment plant effluent to reduce the depth of the compensation point for photosynthetic activity in the receiving waters by more than ten percent from the seasonably established norm for aquatic life.

15. Any discharge which causes the transmittance of the POTW final effluent to fall below sixty percent at two hundred fifty-four nanometers.

16. Any discharge containing radioactive wastes or isotopes except as specifically approved by the director in compliance with applicable state or federal regulations including WAC 246-221-190, Disposal by release into sanitary sewage systems, and meeting the concentration limits of WAC 246-221-290 Appendix A, Table I, Column 2 and WAC 246-221-300 Appendix B.

17. Any sludges, screenings, or other residues from the pretreatment of industrial wastes or from industrial processes.

18. Any medical wastes, except as specifically authorized by the director.

19. Any detergents, surface-active agents, or other substances in amounts which may cause excessive foaming or other interference in the POTW.

20. Any incompatible substance including, but not limited to, grease, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, whole milk, feathers, ashes, cinders, sand, spent lime, stone or marble dusts, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper, wood, plastics, gas, tar asphalt residues, residues from refining or processing of fuel or lubricating oil, mud, or glass grinding or polishing wastes.

21. Persistent pesticides and/or pesticides prohibited above the level set by the Federal Insecticide Fungicide Rodenticide Act (FIFRA).

22. Any wastewater which can cause harm either to the sewers, sewage treatment process, or equipment; have an adverse effect on the receiving stream; or can otherwise endanger life, limb, public property, or constitute a nuisance, unless allowed under a legal and binding agreement by the director (except that no waiver may be given to any categorical pretreatment standard).

C. Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW. (Ord. 016/2021 § 2; Ord. 011/2004)