[Ord. No. 1840, 12-15-2025]
No User shall introduce or cause to be introduced into the POTW any Pollutant or Wastewater which causes Disruption. These general prohibitions apply to all Users of the POTW whether or not they are subject to Categorical Pretreatment Standards or any other Federal, State, and Local Regulations.
[Ord. No. 1840, 12-15-2025]
A. 
No User may discharge or cause to be discharged into the POTW, directly or indirectly, any of the following:
1. 
Any substance in a quantity sufficient to create a potential for fire or explosion, including, but not limited to: discharges with a closed-cup flashpoint of less than one hundred forty degrees Fahrenheit (140° F.) (60° C.), using test methods specified in 40 CFR 261.21.
2. 
Any substance having a pH less than five and five-tenths (5.5) or greater than nine and five-tenths (9.5), or otherwise causing corrosive structural damage to the POTW.
3. 
Any particulates, solids, organic, or inorganic material including but not limited to food waste, disposable wipes, microplastics, resins, or viscous substances in a quantity sufficient to cause, potentially cause, or contribute to Disruption.
4. 
Any substance, including oxygen-demanding Pollutants (BOD, etc.), discharged to the POTW at a flow rate or concentration that will or may cause Disruption, either singly or by interaction with other substances.
5. 
Any Discharge having a temperature greater than one hundred twenty degrees Fahrenheit (120° F.) (49° C.), or which will inhibit biological activity in the treatment plant, but in no case Wastewater which causes the temperature at the introduction into the treatment plant to exceed one hundred four degrees Fahrenheit (104° F.) (40° C.).
6. 
Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that will cause Disruption.
7. 
Any substance that, alone or in combination with other substances in the Wastewater, will or may either singly or by interaction with other wastes create a public nuisance through the creation of toxic, malodorous, or noxious gases, vapors or fumes, poses a hazard to human health or safety, or prevents safe entry into any portion of the POTW for inspection, maintenance, or repair.
8. 
Any trucked or hauled Pollutants, except as authorized at Discharge points designated by the Control Authority.
9. 
Wastewater which imparts color which cannot be removed by the treatment process, such as, but not limited to, inks, dye wastes, paints, and vegetable tanning solutions.
10. 
Wastewater containing any radioactive wastes or isotopes except in compliance with applicable Federal or State Regulations and if authorized by the Control Authority.
11. 
Discharge from stormwater drains, roof runoffs, pond overflows, sumps, or cisterns in a quantity sufficient to cause, potentially cause, or contribute to Disruption.
12. 
Sludges, screenings, or other residues from the Pretreatment of industrial wastes except as specifically authorized by the Control Authority.
13. 
Any substance that would be a hazardous waste prior to mixing with other wastestreams pursuant to 40 CFR 261, if otherwise disposed.
14. 
Medical wastes, in a quantity or quality sufficient to cause, potentially cause, or contribute to Disruption.
15. 
Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail toxicity test.
16. 
Detergents, surface active agents, or other substances in concentrations which might cause excessive foaming in the POTW or receiving stream.
17. 
Total Hexane Extractable Material (HEM), including components of Oil and Grease in concentrations determined to disrupt or interfere with the Control Authority's POTW.
18. 
A Discharge of a pollutant that contribute more than five percent (5%) of the MAIL and the concentration is above the reference concentration for which the Control Authority has developed a MAIL unless specifically authorized.
Pollutants, substances, or Wastewater prohibited by these Regulations shall not be processed or stored in such a manner that they could be discharged to the POTW. No Wastewater or Pollutant shall be directly introduced into a manhole or other opening of the POTW, other than through an approved building sewer, unless authorized by the Control Authority.
[Ord. No. 1840, 12-15-2025]
A. 
Categorical Pretreatment Standards refers to any regulation containing Pollutant Discharge limits promulgated by the EPA in accordance with Sections 307(b) and (c) of the Act (33 U.S.C. Section 1317) that apply to a specific category of Industrial Users and that appear in 40 CFR Chapter I, Subchapter N, Parts 405-471. Any User subject to Categorical Pretreatment Standards is considered a Categorical Industrial User (CIU) and shall comply with the following requirements:
1. 
Where a Categorical Pretreatment Standard is expressed only in terms of either the mass or the concentration of a Pollutant in Wastewater, the Control Authority may impose equivalent concentration or mass limits in accordance with Article II, Section 710.260(A)(5) and (6); reference 40 CFR 403.6(c).
2. 
When the limits in a Categorical Pretreatment Standard are expressed only in terms of mass of Pollutant per unit of production, the Control Authority may convert the limits to equivalent limitations expressed either as mass of Pollutant discharged per day or effluent concentration for purposes of calculating effluent limitations applicable to individual Industrial Users; reference 40 CFR 403.6(c)(2).
3. 
When Wastewater subject to a Categorical Pretreatment Standard is mixed with Wastewater not regulated by the same Standard, the Control Authority shall implement the combined wastestream formula imposed as an alternative Discharge limit in accordance with 40 CFR 403.6(e).
4. 
A Categorical Industrial User may obtain a net/gross adjustment to a Categorical Pretreatment Standard in accordance with parts Article II, Section 710.260(A)(4)(a) and (b); reference 40 CFR 403.15.
a. 
Categorical Pretreatment Standards may be adjusted to reflect the presence of Pollutants in the Industrial User's intake water in accordance with these Regulations. Any Industrial User wishing to obtain credit for intake Pollutants must make application to the Control Authority. Upon request of the Industrial User, the applicable Standard will be calculated on a "net" basis (i.e., adjusted to reflect credit for Pollutants in the intake water) if the requirements of Section 410.260(A)(4)(b) of these Regulations are met.
b. 
Criteria.
(1) 
Either: (A) The applicable Categorical Pretreatment Standards contained in 40 CFR Subchapter N specifically provide that they shall be applied on a net basis; or (B) The Industrial User demonstrates that the control system it proposes or uses to meet applicable Categorical Pretreatment Standards would, if properly installed and operated, meet the Standards in the absence of Pollutants in the intake waters.
(2) 
Credit for generic Pollutants such as BOD, TSS, or Oil and Grease should not be granted unless the Industrial User demonstrates that the constituents of the generic measure in the User's effluent are substantially similar to the constituents of the generic measure in the intake water or unless appropriate additional limits are placed on process water Pollutants either at the outfall or elsewhere.
(3) 
Credit shall be granted only to the extent necessary to meet the applicable Categorical Pretreatment Standard(s), up to a maximum value equal to the influent value. Additional monitoring may be necessary to determine eligibility for credits and compliance with Standard(s) adjusted under these Regulations.
(4) 
Credit shall be granted only if the User demonstrates that the intake water is drawn from the same body of water as that into which the POTW discharges. The Control Authority may waive this requirement if it finds that no environmental degradation will result.
5. 
When a Categorical Pretreatment Standard is expressed only in terms of Pollutant concentrations, an Industrial User may request that the Control Authority convert the limits to equivalent mass limits. The determination to convert concentration limits to mass limits is within the discretion of the Control Authority. The Control Authority may establish equivalent mass limits only if the Industrial User meets all the conditions set forth in the items below.
a. 
To be eligible for equivalent mass limits, the Industrial User must:
(1) 
Employ, or demonstrate that it will employ, water conservation methods and technologies that substantially reduce water use during the term of its Control Mechanism;
(2) 
Currently use control and treatment technologies adequate to achieve compliance with the applicable Categorical Pretreatment Standard, and not have used dilution as a substitute for treatment;
(3) 
Provide sufficient information to establish the facility's actual average daily flow rate for all wastestreams, based on data from a continuous effluent flow monitoring device, as well as the facility's long-term average production rate. Both the actual average daily flow rate and the long-term average production rate must be representative of current operating conditions;
(4) 
Not have daily flow rates, production levels, or Pollutant levels that vary so significantly that equivalent mass limits are not appropriate to control the Discharge; and
(5) 
Have consistently complied with all applicable Categorical Pretreatment Standards during the compliance period prior to the Industrial User's request for equivalent mass limits.
b. 
An Industrial User subject to equivalent mass limits must:
(1) 
Maintain and effectively operate control and treatment technologies adequate to achieve compliance with the equivalent mass limits;
(2) 
Continue to record the facility's flow rates through the use of a continuous effluent flow monitoring device;
(3) 
Continue to record the facility's production rates and notify the Control Authority whenever production rates are expected to vary by more than twenty percent (20%) from its baseline production rates determined in Article II, Section 710.260(A)(5)(a)(3). Upon notification of a revised production rate, the Control Authority will reassess the equivalent mass limit and revise the limit as necessary to reflect changed conditions at the facility; and
(4) 
Continue to employ the same or comparable water conservation methods and technologies as those implemented pursuant to Article II, Section 710.260(A)(5)(a)(1) so long as it discharges under an equivalent mass limit.
c. 
When developing equivalent mass limits, the Control Authority:
(1) 
Will calculate the equivalent mass limit by multiplying the actual average daily flow rate of the regulated process(es) of the Industrial User by the concentration-based Daily Maximum and Monthly Average Standard for the applicable Categorical Pretreatment Standard and the appropriate unit conversion factor;
(2) 
Upon notification of a revised production rate, will reassess the equivalent mass limit and recalculate the limit as necessary to reflect changed conditions at the facility; and
(3) 
May retain the same equivalent mass limit in subsequent Wastewater Discharge Permit terms if the Industrial User's actual average daily flow rate was reduced solely as a result of the implementation of water conservation methods and technologies, and the actual average daily flow rates used in the original calculation of the equivalent mass limit were not based on the use of dilution as a substitute for treatment pursuant to Article II, Section 710.310. The Industrial User must also be in compliance with Article VIII, Section 710.780 regarding the prohibition of bypass.
6. 
The Control Authority may convert the mass limits of the Categorical Pretreatment Standards of 40 CFR Parts 414, 419, and 455 to concentration limits for purposes of calculating limitations applicable to individual Industrial Users. The conversion is at the discretion of the Control Authority. When converting such limits to concentration limits, the Control Authority will use the concentrations listed in the applicable subparts of 40 CFR Parts 414, 419, and 455 and document that dilution is not being substituted for treatment as prohibited by Article II, Section 710.310, [reference 40 CFR 403.6(d)]. In addition, the Control Authority will document how the equivalent limits were derived for any changes from concentration to mass limits, or vice versa, and make this information publicly available, [reference 40 CFR 403.6(c)(7)].
7. 
Once included in its Control Mechanism, the Industrial User must comply with the equivalent limitations developed in Article II, Section 710.260 in lieu of the promulgated Categorical Standards from which the equivalent limitations were derived, [reference 40 CFR 403.6(c)(7)].
8. 
Many Categorical Pretreatment Standards specify one (1) limit for calculating Maximum Daily Discharge limitations and a second limit for calculating maximum Monthly Average, or four (4) day average, limitations. Where such Standards are being applied, the same production or flow figure shall be used in calculating both the average and the maximum equivalent limitation reference 40 CFR 403.6(c)(8).
9. 
Any Industrial User operating under a permit incorporating equivalent mass or concentration limits calculated from a production-based Standard shall notify the Control Authority within two (2) business days after the User has a reasonable basis to know that the production level will significantly change within the next calendar month. Any User not notifying the Control Authority of such anticipated change will be required to meet the mass or concentration limits in its permit that were based on the original estimate of the long-term average production rate; reference 40 CFR 403.6(c)(9).
[Ord. No. 1840, 12-15-2025]
A. 
Where specific prohibitions or limits on Pollutants or Pollutant parameters are developed by the Control Authority in accordance with 40 CFR 403.5(c) such limits shall be deemed Pretreatment Standards for the purposes of Section 307(d) of the Act and shall apply to Significant Industrial Users on an individual Pollutant basis.
1. 
The Control Authority is authorized to establish Local Limits pursuant to 40 CFR 403.5(c) through Regulation or by inclusion in Control Mechanisms as long as the Local Limits are not less stringent than any set forth in the Pretreatment Requirements of 10 CSR 20-6.100 or other requirements or prohibitions established by Federal or State Regulations [see 10 CSR 20-6.100(6)].
2. 
The Control Authority may require implementation of Best Management Practices by Regulation, Rule, or by inclusion in Control Mechanisms to implement Local Limits, control of Pollutants discharged to the POTW, and the requirements of Article II, Section 710.240 and Article II, Section 710.250.
3. 
Local Limits are incorporated as Maximum Allowable Industrial Loads (MAILs).
4. 
MAILs represent the total mass loading allowed from all Significant Industrial Users for a particular POC.
5. 
Loadings of Pollutants will be evaluated at the point representing where Wastewater is discharged to the POTW.
6. 
The Control Authority may issue a Control Mechanism for Industrial Users which contribute POCs higher than reference concentrations or more than five percent (5%) of the MAIL.
7. 
Allocations shall be implemented as a Maximum Daily Limitation (concentration or mass). Alternative effluent limit types may also be specified at the discretion of the Control Authority per Article IV, Section 710.470(A)(1)(c).
8. 
MAILs shall be maintained on file with the Control Authority as Attachment 1[1] to these Regulations;
[1]
Editor's Note: Maximum Allowable Industrial Loads are set out in Attachment 1 to this Chapter.
9. 
The MAILs may be updated based on technical evaluations of Local Limits.
[Ord. No. 1840, 12-15-2025]
A. 
BMPs may be required by the Control Authority to implement the prohibitions listed in Article II, Section 710.240 and Article II, Section 710.250 [See 40 CFR 403.5(a)(1) and (b)].
B. 
BMPs may also be required as an alternative means (i.e., management plans) of complying with, or in place of certain established Categorical Pretreatment Standards, Local Limits, and effluent limits to minimization the introduction of pollutants into the POTW.
C. 
BMPs include treatment requirements, operating procedures, pollution reduction practices, and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw materials storage, or otherwise minimize the introduction of Pollutants to the POTW.
D. 
The Control Authority may implement, where reasonable, special permit conditions requiring Users to identify sources of PECs within their operation, evaluate reduction or elimination strategies, and execute such strategies as necessary to be consistent with the purposes of this Regulation and to comply with Federal, State and Local Regulations.
[Ord. No. 1840, 12-15-2025]
The Control Authority may establish by Regulation, or by inclusion in Control Mechanisms more stringent standards or requirements on discharges of non-domestic waste to the POTW, consistent with the purpose of these Regulations.
[Ord. No. 1840, 12-15-2025]
No User shall ever increase the use of process water, or in any 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 Control Authority may impose mass limitations on Users who are using dilution in an attempt to meet applicable Pretreatment Standards or Requirements, or in other cases when the imposition of mass limitations is appropriate.
[Ord. No. 1840, 12-15-2025]
A. 
The Control Authority shall maintain a list of Pollutants of Concern (POCs) and corresponding reference concentrations representing background concentrations which shall be used as screening criteria to determine if a User may require a Control Mechanism to monitor, limit, or control:
1. 
This list shall be maintained on file with the Control Authority as Attachment 2[1] to these Regulations;
[1]
Editor's Note: Reference Concentrations are set out in Attachment 2 to this Chapter.
2. 
This list may be updated as determined by the Control Authority to include additional POCs or to update the reference concentrations.
B. 
Monitoring data representative of the User's Discharge shall be collected and submitted as required by the Control Authority meeting the requirements of Article VI, Section 710.650 and Article VI, Section 710.660.
C. 
Representative data shall be used to document POCs including if the User meets the requirements of a Significant Industrial User per Article I, Section 710.130, the definition of Significant Industrial User.
D. 
The reference concentrations apply at a point that is representative of the Wastewater that is discharged to the POTW.
[Ord. No. 1840, 12-15-2025]
A. 
The Control Authority has the authority to enter into agreements with a contributing governmental jurisdiction or User outside the POTW's sewer use area.
B. 
Any User desiring the Control Authority to furnish sewer service shall pay for the services provided by the Control Authority based on their use of the treatment works as determined by water meter(s) acceptable to the Control Authority, as determined by Chapter 715, User Charge System with reference to Appendix A[1] of this Chapter, which is on file in the City offices.
1. 
The User shall pay the cost of all lines required to connect with the main belonging to the Control Authority and shall do such connection pursuant to this Article II.
[1]
Editor's Note: The User Fee Schedule is set out in Attachment 3 to this Chapter.
C. 
Agreements between the Control Authority and the contributing jurisdiction or User shall function as a Control Mechanism. In no case will an agreement, contract, or other issued Control Mechanism herein, waive required compliance with Federal, State, or Local Regulations.
D. 
Any violation of the terms and conditions of an agreement shall be deemed a violation of these Regulations and subjects the contributing jurisdiction or User to the enforcement remedies.
E. 
The contributing jurisdiction or User shall be subject to all provisions of these Regulations.
F. 
An agreement with an outside jurisdiction may contain the following provisions:
1. 
A requirement for the contributing jurisdiction to adopt and implement a Sewer Use Ordinance or equivalent regulation which is at least as stringent as these Regulations;
2. 
A requirement that the agreement shall be amended as necessary to reflect changes made to Federal, State, or Local Regulations;
3. 
A requirement that the outside jurisdiction's Sewer Use Ordinance or equivalent regulation be updated in a timely manner to incorporate changes to the Control Authority's Regulations;
4. 
A provision defining roles associated with Pretreatment implementation activities such as identification of Users, Control Mechanism development and issuance, inspection and sampling, and enforcement;
5. 
A requirement for the contributing jurisdiction to submit reports as specified in the agreement which may include the following components:
a. 
User inventory;
b. 
Monitoring results on the Discharge to the Control Authority including flow and pollutant characteristics;
c. 
Treatment upstream of the connection to the POTW if deemed necessary by the Control Authority.
6. 
Limits on the nature, quality, and volume of the contributing jurisdiction's Wastewater at the point where it discharges to the POTW.