(1) 
General Prohibitions. No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which will harm the health of the City's employees working in and around the POTW, interfere with the operation or performance of the POTW, contaminate the resulting biosolids, or will cause 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.
(2) 
Specific Prohibitions.
(a) 
No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or wastewater:
(i) 
Any liquids, solids or gases which by reason of their nature or quantity are, or may be sufficient either alone or in combination with other pollutants to create a fire or explosive hazard in the POTW, or be injurious in any other way to the POTW or its operations, including, but not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides or wastestreams with a closed-cup flashpoint of less than 140° F (60° C) using the test methods specified in 40 CFR 261.21 or otherwise specified by the City Manager. At no time shall two successive readings on an explosion hazard meter, at the point of discharge (or at any point in the POTW) be more than five percent nor shall any single reading be over 10 percent of the lower explosive limit of the meter;
(ii) 
Wastewater having a pH less than 5.5 or more than 12.0, or otherwise having any other corrosive property capable of causing damage or hazard to structures, equipment, and/or personnel of the POTW;
(iii) 
Solid or viscous substances which, either alone or in combination with other pollutants, may cause obstruction to the flow in a sewer or other interference with the operation of the POTW such as, but not limited to: grease, garbage with particles greater than one-half 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 or hops, waste paper, wood, plastics, gas, tar, asphalt residues, residues from refining, or processing of fuel or lubricating oil, mud, or glass grinding or polishing wastes;
(iv) 
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;
(v) 
Wastewater having a temperature greater than 150° F (65° C), or which will inhibit biological activity in the treatment plant or stimulate excessive biological activity in the POTW, resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 104° F (40° C);
(vi) 
Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through;
(vii) 
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;
(viii) 
Trucked or hauled pollutants, except at discharge points designated by the City Manager in accordance with section 4.018;
(ix) 
Noxious or malodorous liquids, gases, solids, or other wastewater which, either singly or by interaction with other pollutants, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair;
(x) 
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;
(xi) 
Wastewater containing any radioactive wastes or isotopes except in compliance with applicable local limits and state or federal regulations;
(xii) 
Any unpolluted water, including, but not limited to, storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater, unless specifically authorized by the City Manager;
(xiii) 
Medical wastes, except as specifically authorized by the City Manager in an individual wastewater discharge permit;
(xiv) 
Any trucked or hauled domestic or non-domestic wastewater hauled and discharged into the POTW treatment plant influent having a pH less than 6.0 or greater than 9.0;
(xv) 
Any wastewater containing pollutants which, either alone or in combination with other pollutants, may injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, creates a toxic effect in the receiving waters of the POTW or exceed any limitation set forth in a National Categorical pretreatment standard or any other pretreatment standard;
(xvi) 
Any pollutant which may cause the POTW's effluent or any other product of the POTW such as residues, biosolids, or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process;
(xvii) 
Any pollutant which will cause the City to violate its NPDES permit; and
(xviii) 
Discontinued, expired, or unused pharmaceuticals to the sanitary sewer is prohibited. Pharmaceuticals include, but are not limited to: hazardous and non-hazardous prescriptions and over-the-counter therapeutic drugs; excess medication in IV bags, syringes, or vials; chemotherapy drug wastes; diagnostic agents; nutraceuticals; and antibiotics, or any hazardous waste pharmaceutical as defined in 40 CFR 266.500.
(b) 
Users that use continuous monitoring techniques for pH shall meet the requirements specified in subsection 4.006(2)(a)(ii); except that temporary excursion above the upper and lower pH values are allowed as long as:
(i) 
The total time during which values for pH are outside the prohibition or limitation value does not exceed seven hours and 26 minutes in any calendar month.
(ii) 
No excursion results in or contributes to violations of the prohibitions in sections 4.006 through 4.014.
(iii) 
In no case shall the discharge have a pH lower than 5.0 except as authorized by the City Manager.
(iv) 
When the City Manager determines that a 60-minute excursion by any user will or may result in a violation, the City Manager may establish a shorter allowable duration for that user.
(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. 6457, 5/15/2023)
Users must comply with the categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405 through 471. These categorical standards shall be met by all industrial users of the regulated industrial categories.
(1) 
Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the City Manager may impose equivalent concentration or mass limits.
(2) 
When the limits in a categorical pretreatment standard are expressed only in terms of mass of pollutant per unit of production, the City Manager 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 City Manager 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 City Manager. The City may establish equivalent mass limits only if the industrial user meets all the conditions set forth in section 4.007(4)(a)(i) through (v), below.
(a) 
To be eligible for equivalent mass limits, the industrial user must:
(i) 
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;
(ii) 
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;
(iii) 
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;
(iv) 
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
(v) 
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:
(i) 
Maintain and effectively operate control and treatment technologies adequate to achieve compliance with the equivalent mass limits;
(ii) 
Continue to record the facility's flow rates through the use of a continuous effluent flow monitoring device;
(iii) 
Continue to record the facility's production rates and notify the City Manager whenever production rates are expected to vary by more than 20 percent from its baseline production rates determined in section 4.007(4)(a)(iii). Upon notification of a revised production rate, the City Manager will reassess the equivalent mass limit and revise the limit as necessary to reflect changed conditions at the facility; and
(iv) 
Continue to employ the same or comparable water conservation methods and technologies as those implemented pursuant to section 4.007(4)(a)(i) so long as it discharges under an equivalent mass limit.
(c) 
When developing equivalent mass limits, the City Manager:
(i) 
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;
(ii) 
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;
(iii) 
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 4.011. The industrial user must also be in compliance with section 4.083 regarding the prohibition of bypass;
(iv) 
The City Manager 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 City Manager.
(5) 
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.
(6) 
Many categorical pretreatment standards specify one limit for calculating maximum daily discharge limitations and a second limit for calculating maximum monthly average, or four-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.
(7) 
Any industrial user operating under a permit incorporating equivalent mass or concentration limits calculated from a production-based standard shall notify the City Manager within two 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 City Manager 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. 6457, 5/15/2023)
State requirements and limitations on discharges to the POTW shall be met by all users which are subject to such standards in any instance in which they are more stringent than the federal requirements and limitations or those in the Industrial Pretreatment Code.
(Ord. No. 6457, 5/15/2023)
(1) 
The City Manager is authorized to establish local limits pursuant to 40 CFR 403.5(c).
(2) 
The pollutant limits are established to protect against pass through and interference. No SIU shall discharge wastewater containing those pollutants into the POTW, in excess of limitations specified by conditions of its discharge permit or published by the City Manager.
(3) 
The City Manager shall publish and revise from time to time rules that designate and establish limits for restricted substances. At all times these rules shall cover and be at least as strict as those for pollutants as defined in state or federal regulations.
(4) 
The limits apply at the point where the wastewater is discharged into the POTW. All concentrations for metallic substances are for total metal unless indicated otherwise. The City Manager may impose mass limitations in addition to the concentration-based limitations above.
(5) 
Individual limits for specific users may be established on a case-by-case basis for compounds not specifically listed in published local limits.
(6) 
The City Manager may develop BMPs, by ordinance or in individual wastewater discharge permits, to implement local limits and the requirements of section 4.006.
(Ord. No. 6457, 5/15/2023)
The City Manager reserves the right to establish, by ordinance, regulation, or in individual wastewater discharge permits, more stringent standards or requirements on discharges to the POTW consistent with the purpose of the Industrial Pretreatment Code.
(Ord. No. 6457, 5/15/2023)
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 City 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. 6457, 5/15/2023)
(1) 
The City Manager may develop BMPs, or require a user to develop BMPs, to implement the prohibitions of section 4.006 (Prohibited Discharge Standards), and section 4.009 (Local Limits). BMPs shall be considered pretreatment standards and local limits for the purposes of the Industrial Pretreatment Code and section 307(d) of the CWA. Additionally, BMPs may be categorical pretreatment standards as established by EPA.
(2) 
The City Manager may develop general BMPs that are applicable to categories of users, or geographic areas.
(Ord. No. 6457, 5/15/2023)
(1) 
Nothing contained in section 4.006 (Prohibited Discharge Standards), section 4.009 (Local Limits), and section 4.012 (Pretreatment Standards—Best Management Practices) shall be construed to prohibit an agreement between the City and any person whereby a discharge which would otherwise be prohibited by the Industrial Pretreatment Code may be admitted to the POTW.
(2) 
Such an agreement may be made when, in the opinion of the City Manager, special circumstances justify such agreement, provided that no interference or pass through results from the discharge, no contamination of the resulting biosolids or recycled wastewater occurs, and no additional costs are incurred by the City without recompense by the person.
(3) 
Categorical pretreatment standards and federal pretreatment requirements shall not be waived by special agreement of the parties.
(Ord. No. 6457, 5/15/2023)
(1) 
A user may be required to provide information to the City Manager pertaining to the nature and quantity of its wastewater discharge. The City Manager may, from time to time, require that a wastewater discharge survey be completed and returned to the City.
(2) 
Optionally, a site survey may be conducted and the necessary information obtained for evaluation. A user may also be required to complete a short-form wastewater discharge survey at the time of the site survey.
(3) 
In addition to or in place of a wastewater discharge survey, the City Manager may require a user to complete an individual wastewater discharge permit application.
(Ord. No. 6457, 5/15/2023)