Specific Prohibitions

No business shall contribute or cause to be contributed into the wastewater treatment system the following pollutants, substances, or wastewater:

  1. Pollutants which create a fire or explosive hazard in the wastewater treatment system, including, but not limited to, waste streams with a closed cup flash point of less than 1400 F (600 C) using the test methods specified in 40 CFR 261.21.
    Materials specifically prohibited from discharge into the wastewater system include gasoline, kerosene, naphtha, fuel oil, used antifreeze, solvents, benzene, toluene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfates, and any others as may be prescribed by the Director.
  2. Solid or viscous substances in amounts which may cause obstruction to the flow in a sewer or other interference with the operation of the wastewater system.
  3. Petroleum oil, non-biodegradable cutting oil or products of mineral oil origin, in amounts that will cause interference or pass through.
  4. Any wastewater or waste having a pH lower than 5.0 or higher than 10.5 at any time, or having any corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the wastewater system.
  5. Any wastewater containing pollutants, including oxygen-demanding pollutants, (Biochemical Oxygen Demand (BOD), etc.) in sufficient quantity, (flow or concentration) either singly or by interaction with other pollutants, to cause interference with the wastewater system.
  6. Any wastewater having a temperature which will inhibit biological activity in the wastewater treatment plant resulting in interference, but in no case wastewater which causes the temperature at the influent to the treatment plant to exceed 1040 F (400 C).
  7. Any pollutants which result in the presence of toxic gases, vapors or fumes within the wastewater system in a quantity that may cause acute worker health and safety problems.
  8. Any trucked or hauled pollutants, except at discharge points designated by the Director.
  9. Any noxious or malodorous liquids, gases, or solids or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for maintenance and repair.
  10. Any substance which may cause the wastewater treatment plant’s effluent or any other product of the system such as residues, sludges, or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case, shall a substance discharged to the wastewater system cause the wastewater plant to be in noncompliance with sludge use or disposal regulations or permits.
  11. Any wastewater or waste which imparts color which cannot be removed by the treatment process, including, but not limited to, dye wastes, paint waste, and tanning solutions, which consequently imparts sufficient color to the treatment plant's effluent to render the waters injurious to public health or secondary recreation or to aquatic life and wildlife or to adversely affect the palatability of fish or aesthetic quality or impair the receiving waters for any designated uses.
  12. Any wastewater containing any radioactive wastes or isotopes except as specifically approved by the Director in compliance with applicable State or Federal regulations.
  13. Storm water, rainwater, groundwater, street drainage, roof top drainage, basement drainage, subsurface drainage or yard drainage, unless specifically authorized by the Director.
  14. Any sludges, screenings or other residues from the pretreatment of waters or wastewaters or industrial wastes except as specifically authorized by the Director.
  15. Any waste, wastewater, or any other substance discharged directly into a manhole, clean-out pipe, or other opening in a sanitary sewer other than through an approved building sewer without prior designation by the Director as an approved point of discharge.
  16. Any material containing ammonia, ammonium salts, or chelating agents that will produce metallic complexes that interfere with the municipal wastewater system.
  17. Any hazardous waste except as specifically authorized by the Director.
  18. Any wastewater causing the treatment plant effluent to violate State Water Quality Standards for toxic substances as described in 15A NCAC 2B .0200.
  19. Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test.
  20. Wastes containing any toxic or poisonous substances in sufficient quantity:
    a. To interfere with the biological processes used in a wastewater treatment system, singularly or in combination.
    b. Which, singularly or in combination with other liquid wastes, upon passing through a wastewater treatment plant, will be harmful to persons, livestock or aquatic life utilizing the receiving streams into which water from a wastewater treatment plant is discharged.
  21. Water or wastes which require excessive quantities of chemicals for stabilization in addition to biological treatment.
  22. Any wastes containing detergents, surface active agents, or other substances which may cause excessive foaming in the municipal wastewater system.
  23. Waste which causes two successive readings on an explosion hazard meter at the point of discharge into the system (or at any point in the system) to be more than five percent (5%), or which causes any single reading to be over ten percent (10%) of the lower explosive limit (LEL) of the meter.
  24. Any medical wastes, except as specifically authorized by the Director.
  25. Any silver-rich solution from a photographic processing facility without treatment.

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