(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 national, 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 degrees F (60 degrees C) using the test methods specified in 40 CFR 261.21;
(2) Wastewater having a pH less than 5.0 or more than 12.0, 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 or be detrimental to POTW operation, including, but not limited to, fats, oil, grease, sand, mud, rags, plastic food packaging, paper towels, and disposable wipes;
(4) 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 the POTW;
(5) Wastewater having a temperature 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 degrees F (40 degrees C);
(6) Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through or wastewater containing more than 100 mg/l on non-polar oil and grease;
(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 Board in accordance with § 52.043;
(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, to prevent entry into the sewers for maintenance or repair, or cause air pollution;
(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 Board's NPDES permit;
(11) Wastewater containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
(12) Sludges, screenings, or other residues from the pretreatment of wastes;
(13) Medical wastes, except as specifically authorized by the Board in a wastewater discharge permit;
(14) Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail toxicity test;
(15) Detergents, surface-active agents, or other substances which might cause excessive foaming in the POTW, thereby violating the Board's NPDES permit;
(16) Wastewater causing a reading on an explosion hazard meter at the point of discharge into the POTW, or at any point in the POTW, of more than 10% of the lower explosive limit of the meter.
(17) 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.
(C) Requirements.
(1) No person shall discharge any substance directly into a manhole or other opening in a city sewer other than through an approved building sewer, unless authorized by the Board.
(2) A user proposing to discharge industrial holding tank waste into a sanitary sewer must secure a permit from the Board. This permit shall state the specific location of discharge, the time of day the discharge is to occur, the volume of the discharge and the wastewater constituents and characteristics. If authorization is granted for discharge of that waste into a sanitary sewer, the user shall pay the applicable user charges and fees and shall meet such other conditions as required by the Board.
(3) Inflow and unpolluted water, including but not limited to surface runoff; water from roof downspouts or foundation drains; and cooling water, process water or blow-down from cooling towers or evaporative coolers; shall not be discharged through direct or indirect connection to a sanitary sewer unless authorization is granted by the Board. If the authorization is granted for the discharge of that water into a sanitary sewer, the user shall pay the applicable user charges and fees and shall meet all other conditions required by the Board.
(4) In any new building, inflow/clear water connection to a combined sewer shall be made separate and distinct from sanitary waste connection to facilitate disconnection of the former if a separate storm sewer subsequently becomes available.
(5) The construction of combined sewers in the city sewerage system is prohibited.
(Ord. 9-2016, passed 6-7-2016)