[Ord. No. 3393 §1, 4-20-2010]
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 one hundred forty degrees Fahrenheit (140°F) (sixty degrees Celsius (60°C)) using the test methods specified in 40 CFR 261.21;
2. 
Wastewater having a pH less than six (6.0) or more than ten (10.0) 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 resulting in interference but in no case solids greater than three (3) inches or seven (7) centimeters 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 one hundred forty degrees Fahrenheit (140°F) (sixty degrees Celsius (60°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 one hundred four degrees Fahrenheit (104°F) (forty degrees Celsius (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 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;
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 violating the City's NPDES permit;
11. 
Wastewater containing any radioactive wastes or isotopes except in compliance with applicable State or Federal regulations;
12. 
Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, non-contact cooling water and unpolluted wastewater, unless specifically authorized by the Superintendent;
13. 
Sludges, screenings or other residues from the pretreatment of industrial wastes;
14. 
Medical wastes, except as specifically authorized by the Superintendent in an individual wastewater discharge permit;
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 which that might cause excessive foaming in the POTW;
17. 
Oils and/or greases in total (polar and non-polar) concentrations greater than one hundred (100) mg/l;
18. 
Wastewater causing two (2) readings on an explosion hazard meter at the point of discharge into the POTW, or at any point in the POTW, of more than five percent (5%) or any single reading over ten percent (10%) of the lower explosive limit of the meter.
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. No. 3393 §1, 4-20-2010]
A. 
Users must comply with the categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405 — 471.
1. 
Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the Superintendent may impose equivalent concentration or mass limits in accordance with Subsections (4) and (5) below.
2. 
When the limits in a categorical pretreatment standard are expressed only in terms of mass of pollutant per unit of production, the Superintendent 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.
3. 
When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the Superintendent shall impose an alternate limit in accordance with 40 CFR 403.6(e).
4. 
When a categorical pretreatment standard is expressed only in terms of pollutant concentrations, an industrial user may request that the City convert the limits to equivalent mass limits. The determination to convert concentration limits to mass limits is within the discretion of the Superintendent. The City may establish equivalent mass limits only if the industrial user meets all the conditions set forth in Subsection (5)(a) below.
5. 
Equivalent mass limits.
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 individual wastewater discharge permit;
(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 waste streams, 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 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 Superintendent whenever production rates are expected to vary by more than twenty percent (20%) from its baseline production rates determined in Subparagraph (5)(a)(3) of this Section. Upon notification of a revised production rate, the Superintendent 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 Subparagraph (5)(a)(1) of this Section so long as it discharges under an equivalent mass limit.
c. 
When developing equivalent mass limits, the Superintendent:
(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 individual wastewater discharger 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 Section 725.100. The industrial user must also be in compliance with the Section regarding the prohibition of bypass.
[Ord. No. 3393 §1, 4-20-2010]
Users must comply with Missouri State Pretreatment Standards codified at 10 Mo. Code of State Regulations 20-6.100 et seq. as promulgated under Section 644.006, RSMo., the "Missouri Clean Water Act".
[Ord. No. 3393 §1, 4-20-2010; Ord. No. 3995, 8-1-2023]
A. 
The Superintendent established local limits pursuant to 40 CFR 403.5(c). The City may also establish Best Management Practices (BMPs) to control certain pollutants. The City will provide public notice and an opportunity to respond to interested parties [40 CFR 403.5(c)(3)]. The City may also set limits as instantaneous maximums or for other durations. The local limits may be developed under guidelines set forth in the Environmental Protection Agency's "Local Limits Development Guidance" document EPA 833-R-04-002A (July 2004).
B. 
Local limits established under Subsection (A) above shall be imposed by individual wastewater discharge permits to implement the requirements of Section 725.050 of this Chapter.
C. 
The Superintendent may develop Best Management Practices (BMPs), by ordinance or in individual wastewater discharge permits, to implement local limits and the requirements of Section 725.050 of this Chapter.
[Ord. No. 3393 §1, 4-20-2010]
The City reserves the right to establish, by ordinance or in individual wastewater discharge permits, more stringent standards or requirements on discharges to the POTW consistent with the purpose of this Chapter.
[Ord. No. 3393 §1, 4-20-2010]
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 Superintendent may impose mass limitations on users who are using dilution to meet applicable pretreatment standards or requirements or in other cases when the imposition of mass limitations is appropriate.