Except as provided elsewhere in this article, prohibited wastes shall include:
A. Industrial wastewater that may be adverse or harmful to the POTW, the sewerage conveyance system, POTW personnel, POTW equipment, or POTW effluent quality, including, but not limited to:
1. Any gasoline, benzene, naphtha, solvent, fuel oil or any other liquids, solids, or gases which may create or tend to create a fire or explosion hazard in the POTW, or may be injurious in any other way to the POTW, including, but not limited to, wastestreams with a closed cup flash point of less than one hundred forty degrees Fahrenheit using the test method specified in 40 CFR § 261.21;
2. Any solids or viscous substances of such size or in such quantities that they may cause obstruction to flow in the sewer or be detrimental to POTW operations. These objectionable substances include, but are not limited to, asphalt, dead animals, ashes, sand, mud, straw, industrial process shavings, metal, glass, rags, feathers, grass clippings, tar, plastic resins, wood, blood, manure, grease, bones, hair, fleshings, entrails, paper cups, paper dishes, milk cartons or other similar paper products, either whole or ground;
3. Any amounts of petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that would cause or tend to cause interference or pass through;
4. Any biodegradable fats, oils, or greases, such as lard, tallow or vegetable oil, in concentrations that may cause adverse effects on the POTW;
5. Any wastes containing a concentration in excess of the discharge limitations specified in Section 13.36.070 or in any permit;
6. Any waste in such concentration or volume that is toxic to humans, animals, and the local environment or to biological wastewater treatment processes or which causes interference, upset, or pass-through at the POTW;
7. Any waste having a pH lower than 5.0 or greater than eleven standard units; or which causes incrustations, scale, or precipitates on sewer walls; or having any corrosive or detrimental characteristics that may cause injury to the POTW or service and maintenance personnel;
8. Any waste having a temperature of one hundred forty degrees Fahrenheit or higher at the discharge point, or which causes the POTW influent to exceed one hundred four degrees Fahrenheit;
9. Any waste containing substances that may precipitate, solidify, gel, polymerize, or become viscous under conditions normally found in the sewerage system, causing reduced capacity;
10. Any waste producing discoloration of treatment plant effluent, which may violate water quality standards;
11. Any solid waste, other than that normally found in domestic wastewater, that is not ground sufficiently to pass through a three-eighths-inch mesh screen;
12. Any waste containing detergents, surface active agents, or other substances, which may cause excessive foaming in the sewerage system;
13. Any sludge from a water or wastewater treatment plant not owned or operated by Pima County regional wastewater reclamation department. The director may issue an industrial wastewater discharge permit for a user to discharge this substance upon a finding that the discharge will not adversely affect the operation of the POTW and that the pollutant concentrations do not exceed those in the sludge produced by the POTW. No such permit shall be issued that would violate any other federal, state or local rule, regulation or standards;
14. Any hazardous wastes discharged to any portion of the POTW by truck, rail or dedicated pipeline;
15. Any trucked or hauled pollutants except at discharge points designated within the POTW by the director, or septage receiving facility;
16. Any slug load; or
17. Pollutants, including oxygen-demanding pollutants (BOD, etc.) released in a discharge at a flow rate and/or pollutant concentration which, either alone or in combination with other pollutants, may cause interference with the POTW.
B. Industrial wastewater which may be dangerous to the public, the environment, or which creates a public nuisance, including, but not limited to:
1. Any excessive quantities of radioactive materials;
2. Any waste containing toxic or poisonous solids, liquids or gases in such quantities that, alone or in combination with other waste substances, may create a hazard for humans, animals, or the local environment; interfere detrimentally with wastewater treatment processes; cause a public nuisance; or cause any condition requiring emergency response in the POTW;
3. Any pollutants which can result in the formation or presence of toxic gases, vapors, or fumes within the POTW that may cause or tend to cause worker health and safety problems;
4. Any strongly odorous waste or waste tending to create odors;
5. Any industrial wastewater in such concentration or volume that may cause failure in effluent toxicity testing;
6. Any recognizable portions of the human anatomy; or
7. Any aqueous film forming foam (AFFF), such as from firefighting activities, that contains any intentionally added per- and poly fluoroalkyl substances (PFAS) including but not limited to PFOA, PFOS, and GenX-like chemicals.
C. Industrial wastewater that may cause dilution or POTW hydraulic loading problems, including, but not limited to:
1. Any water added for the purpose of diluting wastes which would otherwise exceed maximum concentration limits;
2. Any rainwater, stormwater runoff, groundwater, street drainage, roof drainage, yard drainage, water from yard fountains, ponds, lawn sprays or uncontaminated water;
3. Any deionized water, steam condensate or distilled water in amounts which could cause problems with hydraulic loading;
4. Any blowdown or bleed water from heating, ventilating, air conditioning or other evaporative systems exceeding one-third of the makeup water in a twenty-four-hour period; or
5. Any single pass cooling or heating water.
(Ord. 2020-10 § 1, 2020; Ord. 2013-32 (part), 2013)