A. 
General Prohibitions:
1. 
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 regardless of whether they are subject to categorical pretreatment standards or any other National, State, or local pretreatment standards or requirements.
2. 
No user shall discharge any waters containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to contaminate the sludge of the City's sewerage system, or to injure or interfere with any sewage treatment processes that constitute a hazard to humans or animals, creates a public nuisance, or creates any hazard in, or has an adverse effect on, the waters receiving any discharge from the treatment works.
3. 
No user shall discharge any sewage or other polluted waters from any premises within the City into or upon any public highway, land, public place, stream, water course, or into any cesspool, storm drain, or storm drain system (which includes catch basins, curbs, gutters, ditches, manmade channels, municipal streets), private sewer, or natural water outlet, except where suitable treatment has been provided in accordance with applicable Federal, State, and local laws.
B. 
Specific Prohibitions: No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or wastewater. This is applied to every POTW service connection point, individually.
1. 
Any "hazardous waste" as defined in 40 CFR Part 261, unless specifically authorized by the Director;
2. 
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 degrees Fahrenheit (140°F) sixty degrees centigrade (60°C) using the test methods specified in 40 CFR 261.21;
3. 
Wastewater having a pH less than 5.0 or more than 12.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment and/or personnel of the POTW;
4. 
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 one-half inch (1.27 cm) in any dimension. Food waste processors/grinders are prohibited;
5. 
Pollutants, including oxygen consuming pollutants (e.g., BOD), 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, or create a significant load on, the POTW;
6. 
Wastewater having a temperature that will cause the temperature of the wastewater treatment plant influent to exceed one hundred four degrees Fahrenheit (104°F) (forty degrees centigrade (40°C) or will interfere with the biological activity of the wastewater treatment process;
7. 
Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through due to disregard of the City's SOG - Best Management Practices and the City's SOG - Sector Control Policy Requirements;
8. 
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;
9. 
Noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other wastes, that may create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair;
10. 
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 noncompliance with the sludge use or disposal criteria, guidelines, or regulations affecting sludge use or disposal;
11. 
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 MPDES permit;
12. 
Wastewater containing any radioactive wastes or isotopes except in compliance with applicable State or Federal regulations;
13. 
Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, condensate, deionized water, and unpolluted wastewater, unless specifically authorized by the Director;
14. 
Sludges, screenings, inert suspended solids or other residues from the pretreatment of industrial wastes, including, but not limited to, Fuller's earth, lime slurries and lime residues or dissolved solids, including, but not limited to, sodium chloride and sodium sulfate;
15. 
Wastewater causing, alone or in conjunction with other sources, the treatment plant's effluent to fail a toxicity test;
16. 
Detergents, surface-active agents, or other substances which might cause excessive foaming in the POTW;
17. 
Fats, oils, or greases of animal or vegetable origin in concentrations causing a blockage or interference due to disregard of the City's FOG - Best Management Practices and the City's FOG - Sector Control Policy Requirements;
18. 
Wastewater causing two readings on an explosion hazard meter at the point of discharge into the POTW, or at any point in the POTW, of more than 5% or any single reading over 10% of the lower explosive limit of the meter;
19. 
Trucked or hauled wastes or wastewater; and/or
20. 
The discharge of pharmaceuticals, either listed or exhibiting hazardous waste characteristics, as defined in Subparts C, D and appendices in 40 CFR 261 generated from healthcare facilities or reverse distributors. Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that could be discharged to the POTW or to a storm drain or storm drain system.
(Ord. 1911, 7-17-2023)
It shall be unlawful for any SIU to discharge, deposit, cause, or allow to be discharged any waste or wastewater which fails to comply with the limitations imposed by this section.
A. 
The Director is authorized to establish local limits pursuant to 40 CFR 403.5(c). Local limits are established in these City Regulations.
B. 
All users subject to a categorical pretreatment standard shall comply with all requirements of such standard and shall also comply with any limitations contained in these City Regulations.
C. 
The Director may develop BMPs for any SIU or other user, as needed, to implement these City Regulations. BMPs may be implemented through a regulation, permit, policy, order or other notice to the user. BMPs are pretreatment standards and enforceable under these City Regulations.
D. 
The following pollutant limits are established to protect against pass through and interference. Local limits will be calculated, updated as required and adopted by City Council per the Title 40 CFR Part 403. No SIU shall discharge wastewater that exceeds the following limits at any time for any length of time:
Pollutant
Limit
(mg/L)
Arsenic
0.804
Cadmium
0.320
Chromium
2.566
Copper
4.679
Cyanide
0.186
Lead
0.751
Mercury
0.015
Molybdenum
2.758
Nickel
4.126
Selenium
0.387
Silver
0.479
Zinc
1.254
All concentrations for metallic substances are for total metal unless indicated otherwise.
E. 
Additionally, no SIU or any other user shall discharge wastewater that exceeds the City's normal domestic base strength limits, as defined in Section 23B-10(C) below, without being permitted under Article 4 and assessed a surcharge according to the guidelines established in Section 23B-10.
F. 
Pollutant Loadings from Commercial Dischargers: The Director may limit the discharge of pollutants from commercial dischargers as necessary to meet the discharge limits applicable to the POTW pursuant to the ACT, and a MPDES permit or other legal limit or requirement.
G. 
The limits in this section, apply to the point where the wastewater is discharged into the POTW. These limits apply to each discharge point separately. The Director may impose mass limitations in addition to concentration-based limitations. In cases where a user has multiple connections to the POTW, the City will determine analyte limit application per individual connection or as a total for all connection points and apply limits accordingly for each user. Allocation of pollutant loading will follow recommendations in the 2004 EPA local limits guidance manual.
H. 
All users subject to a categorical pretreatment standard shall comply with all requirements of such standards and shall also comply with any limitations contained in these City Regulations. Where the same pollutant is limited by more than one pretreatment standard, the limitations which are more stringent shall prevail. Compliance with categorical pretreatment standards shall be within the timeframe specified in the applicable categorical pretreatment standard.
(Ord. 1911, 7-17-2023)
Any nondomestic customer of the POTW having higher levels of pollutants in their sewage waste than those contained in normal domestic base strength sewage waste, as defined in subsection C below, will be surcharged to cover the added cost of handling and treatment of these wastes. The surcharge is calculated based upon the net excess loading. The use of surcharges does not permit the user to otherwise exceed any local limits specified in Section 23B-9(D), or Federal and State pretreatment standards or City Regulations.
A. 
The City shall require payment covering additional cost of handling and treatment of the excess wastes as determined by the following formula:
SC (analyte) = 8.34*Q*AS*$/lb.+ analysis costs (analyte)
SC
=
Surcharge cost per analyte ($)
8.34
=
Conversion factor; weight in pounds of 1 gallon of water (lb)
Q
=
Volume of sewage discharge to the POTW in million gallons (MG)
AS
=
Additional strength above the normal domestic base strength in parts per million (ppm)
$/lb.
=
Unit charge for each parameter in dollars per pound, as described in City Resolution 5968, Exhibit A
B. 
The application of the above formula provides for a surcharge for biological oxygen demand (BOD), total suspended solids (TSS), total nitrogen (TN), and total phosphorus (TP). The total surcharge cost will be the summation of each of the analytes surcharge costs for a predetermined billing period.
C. 
If the concentration of these pollutants is less than that of normal domestic base strength waste, the user shall not receive a surcharge nor receive a credit. Normal domestic base strength waste is defined by the City as wastewater containing concentrations no greater than the following values: BOD – 250 mg/L, TSS – 250 mg/L, TN – 40 mg/L, and TP – 7.0 mg/L.
D. 
Specific individual high strength charges and calculations for the cost per pound per analyte are defined and applied in accordance with the City's Rules and Regulations Governing Sewer Service.
E. 
Monthly monitoring reports, used for calculating surcharges, will be sent to the City's Industrial Pretreatment Coordinator (IPC) no later than the 10th of each month and will contain any required information from the previous month.
F. 
Flow (Q) used in the surcharge calculation shall be the total monthly flow for the month the sample was taken. If an effluent flow meter is not used or is not operational, the monthly water usage taken during the City's water meter reading will be used to determine flow.
G. 
Surcharges may be waived, at the Director's discretion, in situations where the analyte(s) concentration may be beneficial to the POTW and/or does not add any additional burden to the POTW.
H. 
Analytical costs for each pollutant shall be added to the total shown above.
I. 
Outside jurisdictions, dischargers located outside of the Control Authority's jurisdiction, that convey wastewater to the POTW shall pay surcharges as outlined in the Rules and Regulations Governing Sewer Service. Surcharges for outside jurisdictions and their users shall be calculated and invoiced in the following manner:
1. 
The outside jurisdiction may receive monthly surcharges from the City in their monthly flow billing for any analyte listed above. Monthly flow billing surcharges are calculated from sampling performed weekly at the wastewater treatment plant (WWTP) on the outside jurisdiction's influent as it enters the WWTP, prior to mixing with any other flows;
2. 
All users of an outside jurisdiction with wastewater streams subject to surcharges shall pay such surcharges, to the City, on a monthly basis;
3. 
Each month, the City shall provide the outside jurisdiction with a report listing all user(s) with waste streams requiring surcharge(s). The report shall include details of all analyte(s) and associated costs to which the surcharge(s) apply for each user;
4. 
In months where the outside jurisdiction is assessed a surcharge for a particular analyte in its monthly flow billing and surcharge(s) are assessed for the same analyte to any user(s), the total amount invoiced to the user(s) for that analyte shall be deducted from the outside jurisdictions monthly pretreatment invoice. This method of billing is used to ensure the outside jurisdiction is not being invoiced twice for any high strength wastewater.
(Ord. 1911, 7-17-2023)
The City reserves the right to establish, by ordinance, regulations, or in wastewater discharge permits, more stringent standards or requirements on discharges to the POTW consistent with the purpose of this chapter.
(Ord. 1911, 7-17-2023)
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 Director or designee 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. Any facility with multiple discharge pipes that connect to the City's sewer main in multiple locations shall not use the sum of the volumes of flows as a means to reduce the concentration of pollutants. Calculations used to determine mass loading will utilize the flow volume only from the individual point of connection (pipe, service line, etc.) from which the sample was taken.
(Ord. 1911, 7-17-2023)