(A)   In addition to the general discharge prohibitions in § 52.067 of this chapter, the following pollutants shall not be introduced into 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. At no time shall two successive readings on an explosion hazard meter, at the point of discharge into the system or at any portion in the system, be more than 5% or 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, sulfides and in no case pollutants with a flashpoint of less than 140°F (60°C);
      (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 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, diapers, rags, spent grains, spent hops, wastepaper, wood, plastics, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes. Discharge of petroleum oil, non- biodegradable cutting oil or products of mineral oil origin in amounts that will cause interference or pass through is prohibited;
      (3)   Any wastewater having a pH less than 5.5 or greater than 11.0, 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 or create 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 that 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 non- compliance 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 Wastes Disposal Act, the Clean Air Act, the Toxic Substances Control Act or state criteria applicable to the sludge management method being used;
      (7)   Any substance that will cause the POTW to violate its NPDES and/or state disposal system permit or the receiving water quality standards;
      (8)   Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions;
      (9)   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 which will cause the treatment plant headworks wastewater temperature to exceed 40°C (104°F);
      (10)   Any wastewater containing pollutants, including oxygen demanding pollutants (BOD and the like), 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 either the POTW or any wastewater treatment or sludge process or which will constitute a hazard to humans or animals;
      (11)   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;
      (12)   Any wastewater that causes a hazard to human life or creates a public nuisance;
      (13)   Any wastewater containing any medical or infectious wastes;
      (14)   Any trucked or handled pollutants, except at discharge points designated by the POTW Director in accordance with the city’s Trucked Waste Ordinance; or
      (15)   Any wastewater causing the treatment plant’s effluent to fail a toxicity test.
   (B)   When the Director determines that a user is contributing to the POTW any of the substances enumerated in division (A) above in such amounts as to interfere with the operation of the POTW, the Director 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.
(2013 Code, § 28-79)  (Ord. 14438, passed 8-23-1993; Ord. 14446, passed 11-8-1993)