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. Explosives: Any liquids, 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 explosive hazard 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 any explosion hazard meter, at the point of discharge to the POTW (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;
2. Fire Or Explosion: Pollutants which create a fire or explosion hazard in the POTW including, but not limited to, waste streams with a closed cup flashpoint of less than one hundred forty degrees Fahrenheit (140°F) (60°C) using test methods specified in 40 CFR 261.21 or its successor;
3. Solids:
a. Solid or viscous substances in amounts which will cause obstruction to the flow in the POTW resulting in interference.
b. Solid or viscous pollutants in amounts which will interfere with the operation of the wastewater treatment facilities such as, but not limited to, fats, oils and grease, garbage with particles greater than one-fourth inch (1/4") in any dimension, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinder, sand, spent lime, stone or marble dust, metal, glass, plastics, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes;
4. Low pH Limit: Any wastewater which will cause corrosive structural damage to the POTW, but in no case discharges with pH of less than 5.0, unless the POTW is specifically designed to accommodate such discharges;
5. High pH Limit: Any wastewater with a pH greater than 11.0 or otherwise causing corrosive structural damage to the POTW or equipment;
6. Toxic Pollutants:
a. POTW Interference: Any pollutants including oxygen demanding pollutants (BOD, etc.), 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.
b. Toxic Pollutants: Any 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 wastewater treatment or sludge handling process, constitute a hazard to humans or animals, create an acute toxic effect in the receiving waters of the POTW, contaminate the sludge of the POTW systems, or exceed the limitations set forth in a categorical or local pretreatment standard or requirement;
7. Noxious Substances: Any waste containing noxious or malodorous liquids, in such quantities that, alone or in combination with other waste substances are sufficient to create a hazard for humans, animals or the environment, interfere detrimentally with sewage treatment processes, pass-through treatment facilities in concentrations exceeding discharge limitations, prevent entry into the sewers for their maintenance and repair, cause a public nuisance, or cause any hazardous condition to occur in the POTW;
8. Gaseous Substances: Any pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health and safety problems;
9. Untreatable Substances: Any substance which may cause the POTW's effluent or any other product of the POTW, such as residues, sludges or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process where the POTW is pursuing a reuse and reclamation program. In no case shall a substance discharged to the POTW cause the POTW to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed under section 405 of the act, or its successor; any criteria, guidelines or regulations affecting sludge use or disposal developed pursuant to the solid waste disposal act, the clean air act, the toxic substances control act, or state criteria applicable to the sludge management method being used;
10. UPDES Permit Violation: Any substances which will cause the POTW to violate its UPDES and/or state disposal system permit or the receiving water quality standards;
11. Objectionable Color: Any wastewater with objectionable color not removed in the POTW 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 POTW's UPDES permit;
12. Heat: Any wastewater with heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW treatment plant exceeds forty degrees Celsius (40°C) (104°F);
13. Radioactive Wastes: Any wastewater containing any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the director in compliance with applicable state or federal regulations;
14. Oil And Grease: Any wastewater containing petroleum oil, nonbiodegradable cutting oil, products of mineral oil origin or petroleum based grease, in amounts that will cause interference or pass-through;
15. Trucked Wastes: Trucked or hauled pollutants, except at discharge points designated by the POTW;
16. Waters: Stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the director in a wastewater discharge permit;
17. Pretreatment Residue: Sludges, screenings, or other residues from the pretreatment of industrial wastes;
18. Medical Waste: Medical wastes in amounts or concentrations that would cause a violation of any one of the objectives included in subsection 17.32.020B of this title;
19. Wastewater: Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail any toxicity test;
20. Detergents: Detergents, surface active agents, or other substances that might cause excessive foaming in the POTW;
21. Saltwater: Saltwater or brine from commercial or industrial establishments in concentrations that will interfere with wastewater collection, treatment or treated wastewater reuse including, but not limited to, commercial or industrial backwashes or similar waste streams resulting from the direct addition of salt;
22. Compounds For Pest Control: Any discharges containing compounds that are labeled for the control of pest species of any type, such as, but not limited to, acaricides, bactericides, fungicides, herbicides, insecticides, molluscicides, nematicides and rodenticides in concentrations that would cause interference or pass-through at the POTW or otherwise cause the POTW to violate its UPDES permit.
Pollutants, substances, or wastewater prohibited by this division shall not be processed or stored in such a manner that they could be discharged to the POTW. (Ord. 68-11, 2011)