(A) No user shall contribute or cause to be contributed any pollutant or wastewater which will interfere with the operation or performance of the POTW or cause pass through. These general prohibitions apply to all such users of the POTW whether or not the user is subject to other national pretreatment standards or any national, state, or local pretreatment requirements. A user may not contribute the following substances to the POTW:
(1) 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 explosion or be injurious in any other way to the POTW or to the operation of the POTW, including but not limited to wastestreams with a closed cup flashpoint of less than 140° F or 60° C using test methods specified in 40 C.F.R. § 261.21. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the system (or any point in the system), be more than 5% nor any single reading over 10% of the lower explosive limit (LEL) of the meter. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides and any other substances which the city, the state or EPA has notified the user is a fire hazard or a hazard to the system.
(2) Solid or viscous substances which may cause obstruction to the flow in a sewer or other interference with the operation of the wastewater treatment facilities such as, but not limited to, grease, garbage with particles greater than one-half inch in any dimensions, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, 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.
(3) Any wastewater having a pH less than 6.0 or greater than 9.5, or wastewater having any other corrosive property capable of causing damage or hazard to structures, equipment, and/or personnel of the POTW.
(4) Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW, or to exceed the limitation set forth in a categorical pretreatment standard. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to § 307(a) of the Act.
(5) Any noxious or malodorous liquids, gases, or solids 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.
(6) 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. 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 § 405 of the Act, 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.
(7) Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through.
(8) Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in quantity that may cause acute worker health and safety problems.
(9) Trucked or hauled pollutants, except at discharge points designated by the Supervisor.
(10) Any substance which will cause the POTW to violate its NPDES and/or state permit or the receiving water quality standards.
(11) Any wastewater with objectionable color not removed in the treatment process, such as but not limited to dye wastes and vegetable tanning solutions.
(12) Any wastewater having a temperature which will inhibit biological activity in the POTW treatment plant resulting in interference, but in no case wastewater with a temperature at the introduction into the POTW which exceeds 40°C (104°F).
(13) Any pollutants, including oxygen demanding pollutants (BOD and the like), released at a flow rate and/or pollutant concentration which a user knows or has reason to know will cause interference to the POTW. In no case shall a slug load have a flow rate or contain a concentration of quantities of pollutants that exceed for any time period longer than 15 minutes more than five times the average 24-hour concentration, quantities, or flow during normal operation. In no case shall a flow be released which restricts the hydraulic capacity of sewer structures.
(14) Any wastewater containing any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Supervisor in compliance with applicable state or federal regulations.
(15) Any wastewater which causes a hazard to human life or creates a public nuisance.
(B) When the Supervisor determines that a user is contributing to the POTW any of the above enumerated substances in such amounts as to interfere with the operation of the POTW or cause pass through, the Supervisor shall:
(1) Advise the user of the impact of the contribution on the POTW; and
(2) Develop effluent limitations for such user to correct the interference with the POTW and/or pass through.
(Ord. 677, passed 8-28-2023) Penalty, see § 54.99