§ 25-71. General discharge prohibitions.

No user shall contribute or cause to be contributed, directly or indirectly, any pollutant or wastewater that will pass through, or interfere with the operation or performance of the POTW. These general prohibitions apply to all such users of a POTW whether or not the user is subject to national categorical pretreatment standards or any other national, state, or local pretreatment standards or requirements. A user shall not contribute the following substances to any POTW:

(a)

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 (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 (5) percent nor any single reading over ten (10) percent of the LEL of the meter, nor shall the closed cup flashpoint be less than 140 degrees Fahrenheit or 60 degrees Celsius using the test methods specified in 40 CFR 261.21. 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, POTW, the state or EPA has notified the user is a fire hazard or a hazard to the system.

(b)

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: sludge screenings, or other residues from the pretreatment of industrial wastes, grease, garbage with particles greater than one-half (½) 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, 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.

(c)

Any wastewater having a pH less than 5.0 or greater than 10.0, unless the POTW is specifically designed to accommodate such wastewater, or wastewater having any other corrosive property capable of causing damage or hazard to structures, equipment, and/or personnel of the POTW.

(d)

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, cause, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test, 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 section 307(a) of the Act.

(e)

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.

(f)

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 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 criteria applicable to the sludge management method being used.

(g)

Any substance which will cause the POTW to violate its VPDES and/or state disposal system permit or the receiving water quality standards.

(h)

Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions.

(i)

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 forty degrees (40°) Centigrade (one hundred four degrees (104°) Fahrenheit) unless the POTW treatment plant is designed to accommodate such temperature.

(j)

Any pollutants, including oxygen demanding pollutants (BOD, etc.), released at a flow rate and/or pollutant concentration which will cause interference to the POTW. In no case shall a slug load have a flow rate or contain concentration or qualities of pollutants that exceed for any time period longer than fifteen (15) minutes more than five (5) times the average twenty-four-hour concentration, quantities, or flow during normal operation.

(k)

Any wastewater containing any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the superintendent in compliance with applicable state or federal regulations.

(l)

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

(m)

Any fats or grease, including but not limited to petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass-through.

(n)

Any trucked or hauled pollutants, except at discharge points designated by the control authority.

(o)

Any wastewater containing pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW (or at any point in the system) in a quantity that may cause worker health and safety problems.

(p)

Any material identified as hazardous waste according to 40 CFR 261 except as may be specifically authorized by the superintendent.

(q)

Stormwater, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, cooling water, and unpolluted wastewater, unless specifically authorized by the superintendent.

(r)

Medical wastes, except as specifically authorized by the superintendent in an individual wastewater discharge permit [or a general permit].

(s)

Detergents, surface-active agents, or other substances that might cause excessive foaming in the POTW.

Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW.

When the superintendent determines that a user(s) is contributing to the POTW any of the above enumerated substances in such amounts as to pass through or interfere with the operation of the POTW, the superintendent shall: (1) advise the user(s) of the impact of the contribution on the POTW; and (2) develop effluent limitation(s) for such user(s); and/or initiate enforcement action in accordance with sections 25-99 through 25-100.3.

(Ord. No. 12-1700-936, § 1, 10-2-12)

(Ord. No. 12-1700-936, § 1, 10-2-12)