No user shall introduce into a POTW any pollutant(s) or wastewater which causes pass through or interference. These general provisions and the specific prohibitions in section 13.07.352 below apply to each user introducing pollutants into a POTW whether or not the user is subject to other national pretreatment standards or any national, state, or local pretreatment requirements
(Ordinance 6444 adopted 1/3/22)
(a) 
No user may contribute the following pollutants, substances, or wastewater to the POTW:
(1) 
Pollutants which create a fire or explosive hazard in the municipal wastewater collection and POTW, including, but not limited to, wastestreams with a closed cup flashpoint of less than one hundred forty (140) degrees Fahrenheit or sixty (60) degrees centigrade using the test methods specified in 40 CFR 261.21.
(2) 
Pollutants which will cause corrosive structural damage to the POTW or equipment, or endangering city personnel, but in no case discharges having a pH less than 5.0 or greater than 10.0, unless the works is specifically designed to accommodate such discharges.
(3) 
Any solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW resulting in interference.
(4) 
Any wastewater containing 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 either the POTW, or any wastewater treatment or sludge process, or which will constitute a hazard to humans or animals.
(5) 
Any 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 one hundred four (104) degrees Fahrenheit or forty (40) degrees centigrade. The approval authority, upon request of the POTW, may approve alternate temperature limits.
(6) 
Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through.
(7) 
Any 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) 
Any trucked or hauled pollutants, except at discharge points designated by the city manager in accordance with section 13.07.361 of this division.
(9) 
Any 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, a hazard to life, or to prevent entry into the sewers for maintenance and repair.
(10) 
Any wastewater containing any radioactive isotopes except as specifically approved by the city manager, in compliance with applicable state or federal regulations.
(11) 
Any sludges or screenings from the pretreatment of hazardous waste.
(12) 
Any medical wastes, except as specifically authorized by the city manager in a wastewater discharge permit.
(13) 
Any wastewater causing, alone or in conjunction with other sources, the treatment plant’s effluent to fail a toxicity.
(14) 
Any wastes containing detergents, surface-active agents, or other substances in concentrations which cause excessive foaming in the POTW.
(15) 
Any water contaminated as a result of releases from aboveground and/or underground gasoline, diesel fuels, fuel oil, kerosene, and jet fuel tanks, tank accessories, and/or pipelines without expressed written permission from the city manager is obtained, prior to discharge.
(16) 
Any pollutant or wastewater containing pollutants with UV (254 nm) absorbing substances which causes interference with UV disinfection at the treatment plant.
(17) 
Any stormwater, surface water, groundwater, artesian well water, roof runoff, subsurface drainage, or any other unpolluted waters, unless authorized in writing by the city manager.
(b) 
Wastes prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW. If the industrial user has a pretreatment facility, all floor drains located in process or materials storage areas must discharge to the industrial user’s pretreatment facility before connecting with the POTW.
(Ordinance 6444 adopted 1/3/22)
The city shall reserve the right to regulate discharge of water which is contaminated as a result of a release associated with aboveground and/or underground petroleum fuel tank systems or pipelines. Any discharge which occurs during groundwater pump tests, groundwater remediation, tank tests, and/or other activities including the removal of petroleum fuel contaminated water from groundwater wells, excavations, and utility vaults, must have the expressed written approval of the city manager prior to discharge.
(Ordinance 6444 adopted 1/3/22)
(a) 
The national categorical pretreatment standards found in 40 CFR chapter I, subchapter N, parts 405–471 are hereby incorporated. Henceforth, any new national categorical pretreatment standard shall also become a requirement of this section.
(b) 
When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same Standard, the city manager shall impose an alternate limit in accordance with 40 CFR 403.6(e).
(Ordinance 6444 adopted 1/3/22)
(a) 
The city manager is authorized to establish local limits pursuant to 40 CFR section 403.5(c).
(b) 
It shall be unlawful for any significant industrial user to discharge, deposit, cause, or allow to be discharged any waste or wastewater which fails to comply with the limitations imposed by this section.
(c) 
Uniform concentration-based limits.
No significant industrial user shall discharge wastewater to the POTW that exceeds the following limits:
Monthly Average Contribution*
Pollutant
Symbol
Monthly Average
Arsenic
As
0.04
Cadmium
Cd
0.007
Chromium
Cr
0.94
Copper
Cu
1.3
Cyanide
CN
0.05
Lead
Pb
0.61
Mercury
Hg
0.001
Nickel
Ni
0.48
Selenium
Se
0.01
Silver
Ag
0.05
Zinc
Zn
2.05
* All pollutants shown in the table are total and in mg/L.
(d) 
Reserved.
(e) 
The city may establish more stringent pollutant limits, additional site-specific pollutant limits, best management practices, or additional pretreatment requirements when, in the judgment of the city, such limitations are necessary to implement the provisions of this article.
(f) 
Where an industrial user exceeds these specific pollutant limitations, the city may require the industrial user to:
(1) 
Reduce pollutant concentrations in the suspect wastestreams by implementing pollution prevention measures;
(2) 
Terminate discharge from a specific wastestream(s);
(3) 
Implement best management practices (BMPs) where available to reduce the pollutant concentrations;
(4) 
Install new treatment systems and/or upgrade existing treatment equipment where technology is available to remove such pollutants; and/or
(5) 
Comply with additional monitoring and reporting requirements.
(g) 
The city may take an enforcement action for any violation of a limitation or requirement established in this section.
(h) 
The city may modify an existing wastewater discharge permit or require an industrial user to apply for a wastewater discharge permit or take such other permitting actions as necessary for violations of a specific local discharge limit specified in subsections (b) and (c) of this section.
(i) 
The city may modify these specific pollutant limits as described in the standard operating procedure for the assessment and revision of local limits using the contributory flow method.
(Ordinance 6444 adopted 1/3/22; Ordinance 6716 adopted 5/6/2024)
The city reserves the right to establish, by article or in wastewater discharge permits, more stringent standards or requirements on discharges to the POTW if deemed necessary to comply with the objectives presented in section 13.07.321 of this division or the general and specific prohibitions in sections 13.07.351 and 13.07.352 of this division.
(Ordinance 6444 adopted 1/3/22)
(a) 
The city reserves the right to enter into special agreement with an industrial user, setting out special terms under which they shall discharge to the POTW. In no case will a special agreement waive compliance with a pretreatment standard or requirement.
(b) 
The industrial user may request a net gross adjustment to a categorical standard in accordance with 40 CFR 403.15, which states that categorical pretreatment standards may be adjusted to reflect the presence of pollutants in the industrial user’s intake water. The industrial user must file an application as requested in 40 CFR 403.15(a) and must meet all the criteria established in 403.15(b)(1)–(4), (c).
(c) 
The industrial user may also petition EPA for a variance from the categorical pretreatment standards from EPA. In establishing categorical pretreatment standards for existing sources, the EPA may find it necessary to evaluate industrial users on a case-by-case basis to adjust the limits in categorical pretreatment standards, making them either more or less stringent, as they apply to certain industrial users within an industrial category or subcategory. This will only be done if data specific to that industrial user indicates it presents factors fundamentally different from those considered by EPA in developing the limit at issue. An industrial user requesting a fundamentally different factor variance must comply with the procedural and substantive provisions in 40 CFR 403.13.
(Ordinance 6444 adopted 1/3/22)
No industrial user shall ever increase the use of process water, or in any other way attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with a discharge limitation unless expressly authorized by an applicable pretreatment standard or requirement. The city manager may impose mass limitations on industrial users which are using dilution to meet applicable pretreatment standards or requirements, or in other cases where the imposition of mass limitations is appropriate.
(Ordinance 6444 adopted 1/3/22)
The city shall have the authority to deny/condition new or increased contributions of pollutants, or changes in the nature of pollutants, to the POTW by industrial users where such contributions do not meet applicable pretreatment standards and requirements or where such contributions would cause the POTW to violate its TPDES permit.
(Ordinance 6444 adopted 1/3/22)
Where the city elects to accept hauled waste, the following conditions will apply:
(1) 
Hauled wastes may be introduced into the POTW only at locations designated by the city manager, and at such times as are established by the city manager;
(2) 
The city shall have the right to refuse any hauled waste load;
(3) 
Waste haulers are prohibited from discharging wastes that would violate any prohibited discharge standards in accordance with 40 CFR 403.5(b) or any prohibitions identified in sections 13.07.351 and 13.07.352 of this division;
(4) 
Waste haulers are prohibited from discharging hazardous wastes to the POTW;
(5) 
The waste hauler shall comply with specific pollutant limitations established by the city in section 13.07.356 of this division;
(6) 
The city shall require waste haulers to obtain wastewater discharge permits. The city manager may require generators of hauled wastes to obtain wastewater discharge permits;
(7) 
The city may sample and analyze the hauled wastes or require the hauler to perform such sampling and analysis to verify that each hauled load complies with applicable standards;
(8) 
The city may sample and analyze the hauled wastes or require the hauler to perform such sampling and analysis at the location where the waste is generated;
(9) 
The city may require the industrial waste hauler to receive prior approval or consent before discharging;
(10) 
The waste hauler must notify the city of any new customers or changes in the nature of hauled waste originating from existing customers;
(11) 
The city may restrict the maximum number of loads that a waste hauler may discharge during a specific period of time, and the discharge rate of each load;
(12) 
Industrial waste haulers must provide a manifest form for every load. The form shall include, at a minimum:
(A) 
The name and address of each customer or source of waste;
(B) 
Permit number;
(C) 
Truck identification;
(D) 
Approximate volume(s) received;
(E) 
Known or suspected pollutants present in load(s); and
(F) 
Certification that the hauled waste is not hazardous;
(13) 
Prior to each discharge, the hauler shall provide a completed manifest form. Each manifest form shall be completed in triplicate at a minimum;
(14) 
The city may supply blank manifest forms to each waste hauler; and
(15) 
The city may impose fees or charges for hauled wastes as specified in sections 13.07.751 and 13.07.752 of this division.
(Ordinance 6444 adopted 1/3/22)