(1) 
No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which will cause pass through or interference. These general prohibitions and the specific prohibitions in subsection (3) of this Section apply to all users of the POTW, whether or not the user is subject to categorical pretreatment standards or any other national, State, or local pretreatment standards or requirements.
(2) 
The POTW Manager shall develop local effluent limitations, including numeric standards, for any user or users who contribute to the POTW any of the substances listed in this Section to prevent or correct any interference with operation of the POTW, as required by 40 CFR 403.5(c). The POTW Manager shall use any local limits which are developed in issuing industrial wastewater discharge permits pursuant to Section 4-14-304.
(3) 
No user shall introduce or caused to be introduced into the POTW the following pollutants, substances, or wastewater:
(a) 
Pollutants which create a fire or explosive hazard in the POTW, including, but not limited to, waste streams with a closed cup flashpoint of less than one hundred forty (140) degrees Fahrenheit or sixty (60) degrees Celsius using the test methods specified in 40 CFR 261.21;
(b) 
Solid or viscous substances in amounts which will cause obstruction of the flow in the POTW resulting in interference;
(c) 
Pollutants which will cause corrosive structural damage to the POTW, but in no case discharges with pH lower than five (5.0), unless the POTW is specifically designed to accommodate such discharges;
(d) 
Pollutants which will cause corrosive structural damage to the POTW, but in no case discharges with a pH of more than twelve (12.0);
(e) 
Noxious or malodorous liquids, gases, or solids which, either singly or cumulatively 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;
(f) 
Heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW Water Reclamation Facility exceeds forty (40) degrees Celsius or one hundred four (104) degrees Fahrenheit unless the approval authority, upon request of the POTW, approves alternate temperature limits;
(g) 
Any pollutants, including oxygen-demanding pollutants, released at a flow and/or pollutant concentration which will cause interference to the POTW;
(h) 
Fats, oils, or greases of animal or vegetable origin in concentrations greater than one hundred (100) mg/l;
(i) 
Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or cause pass through;
(j) 
Any trucked or hauled pollutants, except at discharge points designated by the POTW Manager in accordance with Section 4-14-404; or
(k) 
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.
(4) 
Pollutants, substances, or wastewater prohibited by this Section shall not be processed or stored in a manner that they could be discharged to the POTW.
(Ord. No. 07-2014, 03/19/2014; Ord. No. 17-2025 § 1, 08/05/2025)
(1) 
National Categorical Pretreatment Standards specifying quantities or concentrations of pollutants or pollutant properties which may be discharged to a POTW by existing or new industrial users in specific industrial subcategories have been established by EPA in 40 CFR Chapter I, Subchapter N, Parts 405 through 471 and are hereby incorporated.
(2) 
Users must comply with the categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405 through 471.
(3) 
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. Note: See 40 CFR 403.6(c)(8).
(4) 
When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the POTW Manager shall impose an alternate limit in accordance with 40 CFR 403.6(e).
(Ord. No. 07-2014, 03/19/2014)
(1) 
The POTW Manager is authorized to establish local limits pursuant to 40 CFR 403.5(c).
(2) 
Local 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 POTW Manager may impose mass limitations in addition to the concentration-based limitations as stated in the local limit development document.
(3) 
The POTW Manager may develop best management practices (BMPs) by ordinance, policy, rules, regulations, or in individual wastewater discharge permits to implement local limits and the requirements of Section 4-14-602(2)(c).
(4) 
A copy of the documentation that establishes the local limits can be found at the Water Reclamation Facility.
(Ord. No. 07-2014, 03/19/2014; Ord. No. 17-2025 § 1, 08/05/2025)
The City reserves the right to establish, by ordinance, policy, rules, and regulations or in individual wastewater discharge permits more stringent standards or requirements on discharges to the POTW consistent with the purpose of this Chapter. In addition, the Director of Public Works or POTW Manager is authorized to temporarily or permanently revoke or suspend issuance of any type of permit at any time in order to protect the POTW from pass through or interference in order to maintain compliance with any UPDES permit requirement or pretreatment program requirement. The Director of Public Works or POTW Manager shall also have the right to deny new or increased contributions or to set additional conditions on such contributions to protect the POTW, including limits that may be more stringent than the limits set in Section 4-14-301 through 4-14-304.
(Ord. No. 07-2014, 03/19/2014)
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 POTW Manager 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. 07-2014, 03/19/2014)