§ 13-358. Prohibited discharge standards.  


Latest version.
  • (a)

    General prohibitions. No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other federal, state, or local pretreatment standards or requirements.

    (b)

    Specific prohibitions. No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or wastewater:

    (1)

    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 140°F (60°C) using the test methods specified in 40 CFR 261.21. At no time, shall two (2) successive readings on any explosion hazard meter, at the point of discharge into the system (or at any point in the system) be more than five (5) per cent nor any single reading over ten (10) per cent of the lower explosive limit (LEL) of the meter.

    (2)

    Wastewater having corrosive properties capable of causing damage or injury to structures, equipment and/or personnel of the POTW, as per the specific prohibition in the applicable local limits in section 13-361 discharged unless the POTW is specifically designed to accommodate such discharges.

    (3)

    Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference, blockage, or damage to the POTW.

    (4)

    Pollutants, including oxygen-demanding pollutants (BOD, etc.), 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 the POTW.

    (5)

    Wastewater having a temperature greater than 150°F (65°C) or which will inhibit biological activity in the treatment plant resulting in interference, and in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104°F (40°C).

    (6)

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

    (7)

    Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause worker health and safety problems.

    (8)

    Trucked or hauled pollutants, except at discharge points designated by regulatory authority and the control authority in accordance with section 13-368 of this article.

    (9)

    Noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair.

    (10)

    Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts color to the treatment plant's effluent, thereby violating the applicable NPDES permit.

    (11)

    Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations.

    (12)

    Stormwater, surface water, ground water, artesian well water, roof runoff, and subsurface drainage, unless specifically authorized by the regulatory authority.

    (13)

    Sludges, screenings, or other residues from the pretreatment of industrial wastes.

    (14)

    Medical wastes, except as specifically authorized by the regulatory authority and/or the control authority in a wastewater discharge permit.

    (15)

    Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test.

    (16)

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

    (17)

    Fats, oils, or greases of animal or vegetable origin and/or the constituents of total oil and grease in concentrations greater than that specified in the applicable local limits in section 13-361.

    (18)

    A discharge of water, normal domestic wastewater, or industrial waste that which in quantity of flow exceeds, for a duration of longer than fifteen (15) minutes, more than four (4) times the average twenty-four-hour flow during normal operations of the industry.

    (19)

    Insecticides, fungicides, and herbicides in concentrations that are not amenable to treatment.

    (20)

    Polychlorinated biphenyls.

    (21)

    Garbage that is not properly shredded to such an extent that all particles will be carried freely under the flow conditions normally prevailing in wastewater mains, with no particle having greater than one-half-inch cross-sectional dimension.

    (22)

    Wastewater or industrial waste generated or produced outside the city, unless approval in writing from the regulatory authority has been given to the person discharging the waste.

    (23)

    Without the approval of the regulatory authority, a substance or pollutant other than industrial waste, normal domestic wastewater, septic tank waste or chemical toilet waste that is of a toxic or hazardous nature, regardless of whether or not it is amenable to treatment, including, but not limited to bulk or packaged chemical products.

    (24)

    Enzymes, biological agents, emulsifiers, and any other additives or products which are designed to aid in the break down of organic material, oils, greases, waxes, triglycerides, fatty acids, and other like material.

    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.

(Ord. No. 6807, § 1, 3-11-03)