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.
B. Specific Prohibitions: No user shall introduce or cause to be introduced into the POTW the following pollutants, substances or wastewater:
1. Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, waste streams with a closed-cup flashpoint of less than 140°F (60°C) using the test methods specified in 40 CFR 261.21;
2. Wastewater having a pH less than 6.5 or more than 9.0, or otherwise causing corrosive structural damage to the POTW;
3. Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference, but in no case solids greater than one-half inch (1/2") in any dimension;
4. Pollutants, including oxygen-demanding pollutants released in a discharge at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the POTW;
5. Wastewater having a temperature which will inhibit biological activity in the POTW resulting in interference, but in no case wastewater which causes the temperature at the introduction into the POTW plant to exceed 104°F (40°C) unless the City approves alternate temperature limits;
6. Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
7. Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quality that may cause acute worker health and safety problems;
8. Trucked or hauled pollutants, except at discharge points designated by the Pretreatment Coordinator in accordance with subsection 8-4-3D of the Pretreatment Ordinance;
9. 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;
10. 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 City's IPDES permit;
11. Wastewater containing any radioactive wastes or isotopes except as specifically approved in writing by the Supervisor in compliance with applicable state or federal regulations;
12. Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the Pretreatment Coordinator;
13. Sludges, screenings, or other residues from the pretreatment of industrial wastes or from industrial processes;
14. Medical wastes, except as specifically authorized by the Pretreatment Coordinator in an Industrial Wastewater Discharge Permit;
15. Wastewater causing, along or in conjunction with other sources, the WWTP's effluent to fail a toxicity test;
16. Detergents, surface-active agents, or other substances which may cause excessive foaming in the POTW;
17. Any liquid, solids, or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction with other substances to cause fire or explosion or be injurious in any other way to the POTW or to the operation of the POTW. At no time, shall two (2) successive readings on an explosion meter, at the point of discharge into the system (or at any point in the system), be more than five percent (5%) nor any single reading over ten percent (10%) of the lower explosive limit (LEL) of the meter;
18. Grease, garbage other than ground garbage, animal guts or tissues, paunch manure, bones, hair, hides or fleshing's, entrails, whole blood, 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;
19. Any substance which will cause the POTW to violate its IPDES and/or other disposal system permits;
20. Any wastewater, which in the opinion of the WWTP Superintendent or Pretreatment Coordinator can cause harm either to the POTW, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property or constitute a nuisance, unless allowed under special agreement by the Pretreatment Coordinator, except that no special waiver shall be given from categorical pretreatment standards;
21. The contents of any settling tank or other vessel owned or used by any person in the business of collecting or pumping sewage, effluent or septage;
22. Any hazardous waste as prohibited or regulated by the State of Idaho or in EPA Rules 40 CFR Part 261;
23. Persistent pesticides and/or pesticides regulated by the Federal Insecticide Fungicide Rodenticide Act (FIFRA). 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. 2021-621, 9-2-2021)