10-5-4-2: SPECIFIC DISCHARGE PROHIBITIONS:

   A.   Substances Prohibited: No user shall contribute or cause to be discharged, directly or indirectly, any of the following described substances into the POTW:

      1.   Any wastewater having a pH less than five (5) standard units or having any other corrosive property capable of causing damage or hazard to structures, equipment or personnel of the system.

      2.   Any toxic and nontoxic pollutants, including oxygen demanding pollutants (BOD, etc.) and nutrients in sufficient quantity, either singly or by interaction, to injure or interfere with any wastewater treatment process, to constitute a hazard to life or life processes (growth, development, reproduction, etc.), or to exceed the limitations set forth in categorical pretreatment standards.

      3.   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 another way to the POTW or to the operation of the POTW. At no time shall two (2) successive readings on an explosion hazard 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. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides, sulfides and any other substances which the City deems to be a fire hazard or a hazard to the system.

      4.   Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, wastestreams with a closed cup flashpoint of less than one hundred forty degrees Fahrenheit (140°F) (60°C) using the test methods specified in 40 CFR 261.21.

      5.   Any solid or viscous substances which will or may cause obstruction to the flow in a sewer or other interference with the operation of the wastewater system, such as, but not limited to: grease, garbage with particles greater than one- half inch (1/2") in any dimension, 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, wastepaper, wood, plastics, gas, tar, asphalt residues, and residues from refining, or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes.

      6.   Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through.

      7.   Any noxious or malodorous liquid, gases or solids which either singly or by interaction are capable of creating a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for their maintenance and repair.

      8.   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.   Any substance which may cause the POTW effluent or treatment 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 section 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 standards applicable to the sludge management method being used.

      10.   Any substance which will cause the POTW to violate its discharge and/or other disposal system permits, including NPDES, IPDES, and 40 CFR 503 permits.

      11.   Any substance with objectionable color that is not removed in the treatment process, or that causes or may cause interference with in-line colorimetric analyzers, 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 treatment plant which exceeds one hundred four degrees Fahrenheit (104°F) (40°C). If, in the opinion of the City, lower temperatures of such wastes could harm either the sewers, sewage treatment process or equipment; have an adverse effect on the receiving streams or otherwise endanger life, health or property; or constitute a nuisance, the City may prohibit such discharges.

      13.   Any wastewater at a flow rate and/or pollutant discharge rate which is excessive over a relatively short time period so that there is a treatment process upset and subsequent loss of treatment efficiency.

      14.   Any wastewater containing any radioactive wastes or isotopes of such half-life or concentration as exceed limits established by the City in compliance with applicable State or Federal regulations.

      15.   Any wastewater which causes a hazard to human life or creates a public nuisance.

      16.   Any wastewater containing detergents, surfactants, or similar substances that may cause excessive foam or bubbles that persists through the POTW to the point of discharge.

   B.   Processing Or Storing Prohibited Substances: Pollutants, substances, or wastewater prohibited by this chapter shall not be processed or stored in such a manner that could result in their discharge to the POTW. (Ord. 8-19, 7-9-2019)