[R.O. 2014 §710.040; Ord. No. 414 §2.1, 9-25-1980; Ord. No. 574 §2.1, 5-10-1990; Ord. No. 1977, 1-14-2021]
A. 
No user shall contribute or cause to be contributed, directly or indirectly, any pollutant or wastewater which will interfere with the operation or performance of the POTW. These general prohibitions apply to all such users of a POTW whether or not the user is subject to National Categorical Pretreatment Standards or any other National, State, or local pretreatment standards or requirements. A user may not contribute the following substances to any POTW:
1. 
Any liquids, solids or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction with other substances to cause fire or explosion or be injurious in any other way to the POTW or to the operation of the POTW. At no time, shall two (2) successive readings on an explosion hazard meter, at the point in the system be more than five percent (5%) nor any single reading over ten percent (10%) of the Lower Explosive Limit (LEL) of the meter. Prohibited materials, include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides and any other substances which the City, the State or EPA has notified the user is a fire hazard or a hazard to the system.
2. 
Solid or viscous substances which may cause obstruction to the flow in a sewer or other interference with the operation of the wastewater treatment facilities such as, but not limited to: grease, garbage with particles greater than one-half (1/2) inch in any dimension, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, wastepaper, wood, plastics, gas, tar, asphalt residues, residues from refining or processing of fuel or lubricating oil, mud or glass grinding or polishing wastes.
3. 
Any wastewater having a pH less than five (5.0), unless the POTW is specifically designed to accommodate such wastewater, or wastewater having any other corrosive property capable of causing damage or hazard to structures, equipment, and/or personnel of the POTW.
4. 
Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitutes a hazard to humans or animals, creates a toxic effect in the receiving waters of the POTW, or to exceed the limitations set forth in a categorical pretreatment standard. A toxic pollutant shall include but not be limited to any pollutant identified pursuant to Section 307(a) of the Act.
5. 
Any noxious or malodorous liquids, gases, or solids which either singly or by interaction with other wastes are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for their maintenance and repair.
6. 
Any substance which may cause the POTW's effluent or any other product of the POTW such as residues, sludges, or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process where the POTW is pursuing a reuse and reclamation program. In no case, shall a substance discharged to the POTW cause the POTW to be in non-compliance with sludge use or disposal criteria, guidelines or regulations developed under Section 405 of the Act; any criteria, guidelines, or regulations affecting sludge use or disposal developed pursuant to the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act, or State criteria applicable to the sludge management method being used.
7. 
Any substance which will cause the POTW to violate its NPDES and/or State disposal system permit or the receiving water quality standards.
8. 
Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions.
9. 
Any wastewater having a temperature which will inhibit biological activity in the POTW treatment plant resulting in interference, but in no case wastewater with a temperature at the introduction into the POTW which exceeds forty degrees centigrade (40° C.) (104° F.) unless the POTW treatment plant is designed to accommodate such temperature.
10. 
Any pollutants, including oxygen demanding pollutants (BOD, etc.) released at a flow and/or pollutant concentration which a user knows or has reason to know will cause interference to the POTW. In no case shall a slug load have a flow rate or contain concentration or qualities of pollutants that exceed for any time period longer than fifteen (15) minutes more than five (5) times the average twenty-four (24) hour concentration, quantities, or flow during normal operation.
11. 
Any wastewater containing any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Superintendent in compliance with applicable State or Federal regulations.
12. 
Any wastewater which causes a hazard to human life or creates a public nuisance.
B. 
When the Superintendent determines that a user(s) is contributing to the POTW, any of the above enumerated substances in such amounts as to interfere with the operation of the POTW, the Superintendent shall:
1. 
Advise the user(s) of the impact of the contribution on the POTW; and
2. 
Development effluent limitation(s) for such user to correct the interference with the POTW.
[R.O. 2014 §710.050; Ord. No. 414 §2.2, 9-25-1980; Ord. No. 574 §2.2, 5-10-1990; Ord. No. 1977, 1-14-2021]
Upon the promulgation of the Federal Categorical Pretreatment Standard for a particular industrial subcategory, the Federal standard, if more stringent than limitations imposed by or under this Chapter for sources in that subcategory, shall immediately supersede the limitations imposed under this Chapter. The Superintendent shall notify all affected users of the applicable reporting requirements under 40 CFR, Section 403.12.
[R.O. 2014 §710.060; Ord. No. 414 §2.3, 9-25-1980; Ord. No. 574 §2.3, 5-10-1990; Ord. No. 1977, 1-14-2021]
Where the City's wastewater treatment system achieves consistent removal of pollutants limited by Federal pretreatment standards, the City may apply to the approval authority for modification of specific limits in the Federal pretreatment standards. "Consistent removal" shall mean reduction in the amount of a pollutant or alteration of the nature of the pollutant by the wastewater treatment system to a less toxic or harmless state in the effluent which is achieved by the system in ninety-five percent (95%) of the samples taken when measured according to the procedures set forth in Section 403.7(c)(2) of (Title 40 of the Code of Federal Regulations, Part 403) "General Pretreatment Regulations for Existing and New Sources of Pollution" promulgated pursuant to the Act. The City may modify pollutant discharge limits in the Federal pretreatment standards if the requirements contained in 40 CFR, Part 403, Section 403.7, are fulfilled and prior approval from the approval authority is obtained.
[R.O. 2014 §710.070; Ord. No. 414 §2.4, 9-25-1980; Ord. No. 574 §2.4, 5-10-1990; Ord. No. 1977, 1-14-2021]
A. 
The following local limits have been developed pursuant to 40 CFR Section 403.5(c) to prevent against interference and pass through.
B. 
The local limits expressed in pounds per day shall be distributed at the discretion of the pretreatment director via pretreatment program permits to each significant industrial user, as necessary. The sum of each permitted local limit shall not exceed the mass in the table below, Table 1, Local Limits. At the discretion of the Pretreatment Director, the limits established in pretreatment permits may be imposed as pollutant concentrations using appropriate conversion methods.
C. 
All values for metallic pollutants are for total metal unless otherwise indicated.
D. 
Pretreatment Director may develop best management practices (BMPs), by ordinance or in individual pretreatment program permits as local limits to implement the requirements of Section 710.070, Specific Pollutant Limitations (Local Limits).
E. 
Local limits are subject to change as local environmental conditions change. All changes to local limits shall be approved by the Missouri Department of Natural Resources. Refer to the Enforcement Response Plan (ERP) for guidance on all phases of enforcement related to the City's Pretreatment Program.
Table 1: Local Limits
Pollutant
Total Maximum Allowable Industrial Load
(lbs/day)
Arsenic
0.117
Cadmium
0.023
Chromium
0.178
Copper
2.681
Cyanide
0.569
Lead
0.077
Mercury
0.012
Nickel
0.707
Silver
0.361
Zinc
3.279
[R.O. 2014 §710.080; Ord. No. 414 §2.5, 9-25-1980; Ord. No. 574 §2.5, 5-10-1990; Ord. No. 1977, 1-14-2021]
State requirements and limitations on discharges shall apply in any case where they are more stringent than Federal requirements and limitations or those in this Chapter.
[R.O. 2014 §710.090; Ord. No. 414 §2.6, 9-25-1980; Ord. No. 574 §2.6, 5-10-1990; Ord. No. 1977, 1-14-2021]
The City reserves the right to establish by ordinance more stringent limitations or requirements on discharges to the wastewater disposal system if deemed necessary to comply with the objectives presented in Section 710.010 of this Chapter.
[R.O. 2014 §710.100; Ord. No. 414 §2.7, 9-25-1980; Ord. No. 574 §2.7, 5-10-1990; Ord. No. 1977, 1-14-2021]
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 the limitations contained in the Federal Categorical Pretreatment Standards, or in any other pollutant-specific limitation developed by the City or State. (Comment: Dilution may be an acceptable means of complying with some of the prohibitions set forth in Section 710.040, et seq., the pH prohibition.)
[R.O. 2014 §710.110; Ord. No. 414 §2.8, 9-25-1980; Ord. No. 574 §2.8, 5-10-1990; Ord. No. 1977, 1-14-2021]
A. 
Each user shall provide protection from accidental discharge of prohibited materials or other substances regulated by this Chapter. Facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the owner 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 such a plan by January 1, 1983. No user who commences contribution to the POTW after September 25, 1980, 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 the requirements of this Chapter. 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 describing the cause of the discharge and the measures to be taken by the user to prevent similar future occurrences. Such notification shall not relieve the user of any expense, loss, damage, or other liability which may be incurred as a result of damage to the POTW, fish kills, or any other damage to person or property, nor shall such notification relieve the user of any fines, civil penalties, or other liability which may be imposed by this Article or other applicable law.
C. 
Notice To Employees. A notice shall be permanently posted on the user's bulletin board or other prominent place advising employees whom to call in the event of a dangerous discharge. Employers shall ensure that all employees who may cause or suffer such a dangerous discharge to occur are advised of the emergency notification procedure.
D. 
Significant industrial users are required to notify the Superintendent immediately of any changes at its facility, including changes affecting the potential for a slug discharge.
[Ord. No. 1977, 1-14-2021]
A. 
Any user who commences the discharge of hazardous waste shall notify the POTW, the EPA Regional Waste Management Division Director, and State hazardous waste authorities, in writing, of any discharge into the POTW of a substance which, if otherwise disposed of, would be a hazardous waste under 40 CFR Part 261. Such notification must include the name of the hazardous waste as set forth in 40 CFR Part 261, the EPA hazardous waste number, and the type of discharge (continuous, batch, or other). If the user discharges more than one hundred (100) kilograms of such waste per calendar month to the POTW, the notification also shall contain the following information to the extent such information is known and readily available to the user: an identification of the hazardous constituents contained in the wastes, an estimation of the mass and concentration of such constituents in the wastestream discharged during that calendar month, and an estimation of the mass of constituents in the wastestream expected to be discharged during the following twelve (12) months. All notifications must take place no later than one hundred eighty (180) days after the discharge commences. Any notification under this paragraph need be submitted only once for each hazardous waste discharged. However, notifications of changed conditions must be submitted under Section 710.100(D) of this Chapter. The notification requirement in this Section does not apply to pollutants already reported by users subject to categorical pretreatment standards under the self-monitoring requirements of Section 710.160 of this Chapter.
B. 
Dischargers are exempt from the requirements of Subsection (A), above, during a calendar month in which they discharge no more than fifteen (15) kilograms of hazardous wastes, unless the wastes are acute hazardous wastes as specified in 40 CFR Sections 261.30(d) and 261.33(e). Discharge of more than fifteen (15) kilograms of non-acute hazardous wastes in a calendar month, or of any quantity of acute hazardous wastes as specified in 40 CFR Sections 261.30(d) and 261.33(e), requires a one-time notification. Subsequent months during which the user discharges more than such quantities of any hazardous waste do not require additional notification.
C. 
In the case of any new regulations under Section 3001 of RCRA identifying additional characteristics of hazardous waste or listing any additional substance as a hazardous waste, the user must notify the Superintendent, the EPA Regional Waste Management Waste Division Director, and State hazardous waste authorities of the discharge of such substance within ninety (90) days of the effective date of such regulations.
D. 
In the case of any notification made under this Section, the user shall certify that it has a program in place to reduce the volume and toxicity of hazardous wastes generated to the degree it has determined to be economically practical.
E. 
This provision does not create a right to discharge any substance not otherwise permitted to be discharged by this Chapter, a permit issued thereunder, or any applicable Federal or State law.