(A) General prohibitions.
(1) 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 national, state, or local pretreatment standards or requirements.
(2) Storm water and all other unpolluted drainage shall be discharged to sewers that are specifically designated as storm sewers, or to a natural outlet approved by the Director. No liquid, semi-liquid, ready mixed concrete, mortar, asphalt material, or chemical waste shall be deposited in any area that will drain to the storm sewer or natural outlet.
(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 C.F.R. 261.21;
(2) Wastewater having a pH less than 5.5 or more than 11.0, or otherwise causing corrosive structural damage to the POTW or equipment;
(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 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, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104°F (40°C);
(6) Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference and/or pass through, and in amounts specified in § 51.017;
(7) 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;
(8) Trucked or hauled pollutants, except at discharge points designated by the Director and in accordance with § 51.026;
(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 or TPDES permit;
(11) Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
(12) Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, and unpolluted wastewater, unless specifically authorized by the Director;
(13) Sludges, screenings, or other residues from the pretreatment of industrial wastes;
(14) Medical wastes, except as specifically authorized by the Director, that do not cause or contribute to pass through and/or interference;
(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 in concentrations greater than that specified in the applicable local limits in § 51.017;
(18) A discharge of water, normal domestic wastewater, or industrial waste which in quantity of flow exceeds, for a duration of longer than fifteen minutes, more than four times the average twenty-four hour flow during normal operations of the industry;
(19) Insecticides and herbicides in concentrations that are not amenable to treatment;
(20) 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;
(21) Wastewater or industrial waste generated or produced outside the city, unless approval in writing from the Director has been given to the person discharging the waste; or
(22) Without the approval of the Director, 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.
(C) Processing and storage. 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. 317, passed 10-16-1995; Am. Ord. O-21-932, passed 3-1-2021) Penalty, see § 51.999