[Ord. No. 380-2023, 2-21-2023]
It shall be unlawful to discharge to any natural outlet within the City or in any area under the jurisdiction of the City any sewage or other polluted waters, except where suitable treatment has been provided in accordance with subsequent provisions of this Article.
[Ord. No. 380-2023, 2-21-2023]
A. 
No person shall discharge or cause to be discharged any storm water, surface water, interior or exterior foundation drains, groundwater, roof runoff, subsurface drainage, cooling water, or unpolluted industrial process waters to any sanitary sewer.
B. 
Storm water and all other unpolluted drainage shall be discharged to such sewers as are specifically designated as storm sewers or to a natural outlet approved by the approving authority.
C. 
Industrial cooling water or unpolluted process waters may be discharged, upon approval by the approving authority, to a storm sewer or to a natural outlet.
[Ord. No. 380-2023, 2-21-2023]
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.) (60° C.) using the test methods specified in 40 CFR 261.21;
2. 
Wastewater having a pH less than 6.0 or more than 9.5, 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 POT resulting in Interference but in no case solids greater than three (3) inch(es) or seven (7) centimeter(s) 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 fifty degrees Fahrenheit (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 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 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, except at discharge points designated by the Superintendent;
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. 
Fats, oils, or greases of animal or vegetable origin in concentrations greater than one hundred (100) mg/l;
18. 
Hazardous wastes as defined in 40 CFR Part 261.
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. 380-2023, 2-21-2023]
A. 
The Superintendent is authorized to establish Local Limits pursuant to 40 CFR 403.5(c).
B. 
Any waters or wastes containing the following substances to such a degree that the maximum concentration loading from all SIUs exceeds the limit specified in the table below. The Public Works Director will develop the permit limitations for all users that meet the definition of SIU as defined by City Ordinance. The Table of Maximum Concentration Allowable is as follows:
Maximum Concentration Allowable (mg/l) from S.I.U.s per Day.
No person shall discharge wastewater containing in excess of:
Monthly Average
(mg/l)
Daily Maximum
(mg/l)
Arsenic
—
0.069
—
Cadmium
(T)
0.09
0.69
Copper
(T)
1
3.38
Chromium
(T)
1.55
2.77
Cyanide
(T)
0.042
1.2
Lead
(T)
0.4
0.69
Mercury
(T)
0.007
—
Nickel
(T)
*
3.98
Phenols
(T)
1
—
Silver
—
0.24
0.43
Zinc
(T)
1.48
2.61
Sulfate
—
**
—
pH
—
—
6.0 to 10.0
Oil and Grease
—
—
200
TTO (total toxic organics)
—
—
2.13
*
Nickel — At no time shall the headworks of the POTWs (Shoal Creek, Crowder) exceed 1.778 lbs. per day from industrial sources.
**
Sulfate — At no time shall the headworks of the POTWs combined exceed 1,140 lbs. per day from industrial sources.
The above limits apply at the point where the wastewater is discharged to the POTW. All concentrations for metallic substances are for total metal unless indicated otherwise. The Superintendent may impose mass limitations in addition to the concentration-based limitations above.
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 705.570.
[Ord. No. 380-2023, 2-21-2023]
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.
[Ord. No. 380-2023, 2-21-2023]
A. 
Users must comply with the categorical Pretreatment Standards found at 40 CFR Chapter 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 Sections 705.600(A)(4) and 705.600(A)(5).
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 Sections 705.600(A)(4)(a)(1) through 705.600(A)(4)(a)(5) 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 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 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 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 Subsection (A)(4)(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 Subsection (A)(4)(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 705.590.
5. 
The Superintendent 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 Superintendent.
6. 
Once included in its permit, the Industrial User must comply with the equivalent limitations developed in this Section in lieu of the promulgated categorical Standards from which the equivalent limitations were derived.
7. 
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.
8. 
Any Industrial User operating under a permit incorporating equivalent mass or concentration limits calculated from a production-based Standard shall notify the Superintendent 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 Superintendent 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.
[Ord. No. 380-2023, 2-21-2023]
Users must comply with State of Missouri Pretreatment Standards codified at 10 CSR 20-6.100.
[Ord. No. 380-2023, 2-21-2023]
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. 380-2023, 2-21-2023]
Users shall provide necessary wastewater treatment as required to comply with this Article and shall achieve compliance with all Federal categorical pretreatment standards within the time limitations as specified by the Federal pretreatment regulations. Any facilities required to pretreat wastewater to a level acceptable to the City shall be provided, operated and maintained at the user's expense. Detailed plans showing the pretreatment facilities and operating procedures shall be submitted to the City for review and shall be acceptable to the City before construction of the facility. The review of such plans and operating procedures will in no way relieve the user from the responsibility of modifying the facility as necessary to produce an effluent acceptable to the City under the provisions of this Article. Any subsequent changes in the pretreatment facilities or method of operation shall be reported and be acceptable to the City prior to the user's initiation of the changes.
[Ord. No. 380-2023, 2-21-2023]
A. 
Grease, oil or sand interceptors shall be provided by contributors when in the opinion of the approving authority they are necessary for the proper handling of liquid waste containing grease in excessive amounts or any flammable waste, sand or other harmful ingredients, except that such interceptors shall not be required for private living quarters of dwelling units.
B. 
All interceptors shall be of an approved type and capacity which meets City and State Code requirements and shall be readily and easily accessible for cleaning and inspection.
C. 
Where installed, all grease, oil or sand interceptors shall be owned and maintained in continuously efficient operation at all times by the contributor, at his/her expense.
[Ord. No. 380-2023, 2-21-2023]
A. 
The City shall require to be provided and operated at the user's own expense monitoring facilities to allow inspection, sampling and flow measurement of the building sewer and/or internal drainage systems. The monitoring facility should normally be situated on the user's premises, but the City may, when such a location would be impractical or cause undue hardship on the user, allow the facility to be constructed in the public street or sidewalk area and located so that it will not be obstructed by landscaping or parked vehicles.
B. 
There shall be ample room in or near such sampling manhole or facility to allow accurate sampling and preparation of samples for analysis. The facility, sampling and measuring equipment shall be maintained at all times in a safe and proper operating condition at the expense of the user.
C. 
Whether constructed on public or private property, the sampling and monitoring facilities shall be provided in accordance with the City's requirements and all applicable local construction standards and specifications. Construction shall be completed within ninety (90) days following written notification by the City.
[Ord. No. 380-2023, 2-21-2023]
City personnel shall inspect the facilities of any user to ascertain whether the purpose of this Article is being met and all requirements are being complied with. Persons or occupants of premises where wastewater is created or discharged shall allow the personnel or their representative ready access at all reasonable times to all parts of the premises for the purposes of inspection, sampling, records examination and copying or in the performance of any of their duties. The City, approval authority and (where the NPDES State is the approval authority) the EPA shall have the right to set up on the user's property such devices as are necessary to conduct sampling inspection, compliance monitoring and/or metering operations. Where a user has security measures in force which would require proper identification and clearance before entry into their premises, the user shall make necessary arrangements with their security guards so that upon presentation of suitable identification, personnel from the City, approval authority and the EPA will be permitted to enter, without delay, for the purposes of performing their specific responsibilities.
[Ord. No. 380-2023, 2-21-2023]
A. 
Prevention. Each user shall provide protection from accidental discharge of prohibited materials or other substances regulated by this Article. Facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the owner's or user's own cost and expense. Detailed plans showing facilities and operating procedures to provide this protection shall be submitted to the City for review and shall be approved by the City before construction of the facility. All existing users shall complete [should have completed] such a plan by January 1, 1985. No user who commences contribution to the POTW after the effective date of this Article shall be permitted to introduce pollutants into the system until accidental discharge procedures have been approved by the City. Review and approval of such plans and operating procedures shall not relieve the industrial user from the responsibility to modify the user's facility as necessary to meet requirements of this Article. In the case of an accidental discharge, it is the responsibility of the user to immediately telephone and notify the POTW of the incident. The notification shall include location of discharge, type of waste, concentration and volume, and corrective actions.
B. 
Written Notice. Within five (5) days following an accidental discharge, the user shall submit to the Superintendent a detailed written report as described in Section 705.540(F)(2) of this Chapter.
C. 
Accidental Discharge/Slug Discharge Control Plans. The Superintendent shall evaluate whether or not each SIU needs an accidental discharge/slug discharge control plan or other action to control Slug Discharges. The Superintendent may require any User to develop, submit for approval, and implement such a plan or take such other action that may be necessary to control Slug Discharges. Alternatively, the Superintendent may develop such a plan for any User. An accidental discharge/slug discharge control plan shall address, at a minimum, the following:
1. 
Description of discharge practices, including non-routine batch discharges;
2. 
Description of stored chemicals;
3. 
Procedures for immediately notifying the Superintendent of any accidental or Slug Discharge, as required by Section 705.540(F); and
4. 
Procedures to prevent adverse impact from any accidental or Slug Discharge. Such procedures include, but are not limited to, inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operation, control of plant site runoff, worker training, building of containment structures or equipment, measures for containing toxic organic pollutants, including solvents, and/or measures and equipment for emergency response.
[Ord. No. 380-2023, 2-21-2023]
If any provision of this Chapter is invalidated by any court of competent jurisdiction, the remaining provisions shall not be affected and shall continue in full force and effect.