(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, waste streams with a closed-cup flashpoint of less than 140 degrees Fahrenheit (60 degrees Centigrade) using the test methods specified in 40 CFR 261.21;
(2) Wastewater having a pH less than 5.0 or more than 10.0 standard units, 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 but in no case solids greater than 3/4-inch in any dimension;
(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 140 degrees Fahrenheit (60 degrees Centigrade), 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 degrees Fahrenheit (40 degrees Centigrade);
(6) Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through; but in no case greater than the discharge limitations for non-polar oil and grease provided in § 55.019(B);
(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 Superintendent in accordance with § 55.138;
(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 causing a violation of the city’s 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, subsurface drainage, swimming pool drainage, condensate, de-ionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the Superintendent;
(13) Sludges, screenings, or other residues from the pretreatment of non-residential wastes;
(14) Medical wastes, except as specifically authorized by the Superintendent in an individual or general 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 in amounts that cause, or have the potential to cause, excessive foaming in the POTW;
(17) Wastewater causing two readings on an explosion hazard meter at the point of discharge into the POTW, or at any point in the POTW, of more than 10% or any single reading over 15% of the lower explosive limit of the meter;
(18) Materials causing, alone or in conjunction with other materials normally in the sewer system, an obstruction to the flow in the sewer line or system; injury or damage to the sewer system; the creation of a nuisance or prevention of effective maintenance or operation of the sewer system;
(19) Fats, oils, or greases of animal or vegetable origin in concentrations greater than the discharge limitations for polar oil and Grease provided in § 55.019(B);
(C) 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. 6619, passed 1-28-13)