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No reduction in sewage charges will be permitted because of the fact that certain industrial wastes discharged to the POTW may contain less than 300 milligrams per liter of suspended solids or less than 250 milligrams per liter of BOD or less than 20 milligrams per liter of chlorine requirement.
(Ord. 1433, passed 7-1-2002)
(A) Whenever a property upon which a sewer rental or use charge is imposed by the city uses water from the city’s water supply system such that the water so used is not discharged into the POTW, the quantity of water so used and not discharged into the city’s sewers shall be measured by a metering or measuring device approved by the city and installed without cost to the city.
(B) Where in the opinion of the city it is not practical to install a metering or measuring device to continuously determine the quantity of water not discharged into the POTW, the city shall determine periodically, in such manner and by such method as it may prescribe, the percentage of water from the city water supply system discharged into the POTW from such property, and the quantity of water used to determine the sewerage rental or use charge shall be the percentage of city water so used by such property.
(C) When requested in writing, persons complying with the terms of this section will be granted a suitable reduction in their sewage bills. Such reduction shall be calculated on that portion of the sewage consumption diverted and excluded from the POTW.
(D) Persons requesting consideration for a reduction in their sewage bills because of water excluded from the POTW shall make written application to the city for such consideration giving their name, address and supporting data fully describing other sources of incoming water, if any, as well as the specific disposition of all water alleged not to be entering the POTW. The application shall be accompanied by a scale drawing showing the plan of the property, water distribution system, sewer layout, existing meters and proposed meters in the drawing proposed for determining the quantity of water entering, and not entering, the POTW.
(Ord. 1433, passed 7-1-2002)
The city shall promulgate and enforce such rules and regulations deemed necessary for the enforcement of this chapter and for the safe, economical and efficient management, control and protection of the city’s POTW. Such rules and regulations shall be consistent with the intent and objectives of this chapter.
(Ord. 1433, passed 7-1-2002)
GENERAL SEWER USE REQUIREMENTS
(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.
(2) 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 gasoline, benzene, naphtha, fuel oil, used motor oil and any other 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 5.0 or more than 12.5, or as more stringently designated by the coordinator for the purpose of protecting the POTW 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 one-half inch in any dimension;
(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 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 or pass through;
(7) Pollutants which result in the presence of flammable, explosive, 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 coordinator in accordance with § 52.045;
(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 containing any radioactive wastes or isotopes except in compliance with applicable state or federal regulations;
(11) Stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water and unpolluted wastewater, unless specifically authorized by the coordinator;
(12) Sludges, screenings or other residues from the pretreatment of industrial wastes;
(13) Medical wastes, except as specifically authorized by the coordinator in a wastewater discharge permit;
(14) Wastewater causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity test;
(15) Detergents, surface-active agents or other substances which may cause excessive foaming in the POTW;
(16) Fats, waxes, oils or greases of animal or vegetable origin in concentrations greater than 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32°F and 150°F (0°C and 65°C); or
(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 5% or any single reading over 10% of the lower explosive limit of the meter.
(C) Use of prohibited substances. Pollutants, substances or wastewater prohibited by this section shall not be processed, handled, stored or disposed of in such a manner that they could be discharged to the POTW.
(Ord. 1433, passed 7-1-2002) Penalty, see § 52.999
(A) The federal categorical pretreatment standards found at 40 C.F.R. Chapter I, Subchapter N are hereby incorporated by reference. No user shall introduce or cause to be introduced into the POTW any pollutants, substances or wastewater in violation of any federal categorical pretreatment standard applicable to such user.
(B) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the coordinator may impose equivalent concentration or mass limits in accordance with 40 C.F.R. § 403.6(c).
(C) When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the coordinator shall impose an alternate limit using the combined wastestream formula in 40 C.F.R. § 403.6(e).
(D) A user may obtain a variance from a categorical pretreatment standard if the user can prove, pursuant to the procedural and substantive provisions in 40 C.F.R. § 403.13, that factors relating to its discharge are fundamentally different from the factors considered by EPA when developing the categorical pretreatment standard.
(E) A user may obtain a net gross adjustment to a categorical standard in accordance with 40 C.F.R. § 403.15.
(Ord. 1433, passed 7-1-2002)
No user shall introduce or cause to be introduced into the POTW any pollutants, substance or wastewater in violation of applicable state law and/or any state standard applicable to such user.
(Ord. 1433, passed 7-1-2002) Penalty, see § 52.999
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