Yuba City Municipal Code Art. 1 General Provisions

The purpose of this chapter is to provide for the maximum possible beneficial public use of City facilities through the adequate regulation of sewer construction, sewer use, and industrial wastewater discharges; to provide for the equitable distribution of City costs; and to provide procedures for complying with the requirements placed upon the City by other regulatory agencies.

This chapter sets forth uniform requirements for dischargers to the publicly owned treatment works and enables the City to comply with the administrative provisions of the Clean Water Grant Regulations; water quality requirements of the Regional Water Quality Control Board and the applicable effluent limitations; State Water Resources Control Board's Sanitary Sewer Systems Waste Discharge Requirements (WDR) and Monitoring and Reporting Requirements for the Sanitary Sewer System in reference to the City's sewer system management plan (SSMP); national standards of performance, toxic, and pretreatment effluent standards; and all other applicable State and Federal laws, including the Clean Water Act (33 U.S.C. § 1251 et seq.) and the General Pretreatment Regulations (40 CFR 403). In the event that state and/or federal wastewater discharge or treatment regulations and/or standards exist or are subsequently adopted which are more stringent and/or restrictive than the requirements of this chapter, the more stringent and restrictive regulations shall apply. The primary objectives of this chapter include:

(a) To prevent the introduction of pollutants into the publicly owned treatment works that will interfere with its operation;

(b) To prevent illicit discharges (e.g., infiltration and inflow, chemical dumping, unauthorized debris, etc.) into the sanitary sewer system;

(c) To prevent the introduction of pollutants into the publicly owned treatment works that will pass through the publicly owned treatment works, inadequately treated, into receiving waters, or otherwise be incompatible with the publicly owned treatment works;

(d) To protect both publicly owned treatment works personnel who may be affected by wastewater and sludge in the course of their employment and the general public;

(e) To promote reuse and recycling of industrial wastewater and sludge from the publicly owned treatment works;

(f) To provide for fees for the equitable distribution of the cost of operation, maintenance, and improvement of the publicly owned treatment works;

(g) To enable the City to comply with its National Pollutant Discharge Elimination System permit conditions, sludge use and disposal requirements, and any other Federal or State laws to which the publicly owned treatment works is subject;

(h) To require that sanitary sewers and connections are properly designed, constructed, and maintained;

(i) To ensure access in easements, rights-of-way, and any other areas where sanitary sewer system facilities are installed for maintenance, inspection, or repairs of the sanitary sewer system and any portions of the service laterals and satellite collection system;

(j) To limit discharge of fats, oils, grease, and other debris that may cause blockages; and

(k) To enforce any violations of this chapter.

This chapter shall apply to all users of the publicly owned treatment works. This chapter authorizes the issuance of wastewater discharge permits; provides for monitoring, inspections, compliance, and enforcement activities; establishes administrative review procedures; requires user reporting; and provides for the setting of fees for the equitable distribution of costs resulting from the program established herein.

Revenues derived from the application of this chapter shall be used to defray the City's cost of operating and maintaining adequate wastewater collection and treatment systems and to provide sufficient funds for capital outlay, bond service cost, capital improvements, depreciation, and/or capital replacement.

(Ord. No. 007-16, § 2, 6-21-2016; Ord. No. 001-22, § 3, 1-18-2022)

This chapter shall be interpreted in accordance with the definitions set forth in Section 6-5.106. of this article.

The provisions of this chapter shall apply to the direct or indirect discharge of all liquid-carried wastes to the facilities of the City. This chapter, among other things, provides for the regulation of sewer construction in areas within the City, the quantity and quality of discharged wastes, the degree of waste pretreatment required, the setting of waste discharge fees to provide for the equitable distribution of costs, the approval of plans for sewer construction, the issuance of permits for industrial wastewater discharges and of other miscellaneous permits, and the establishment of penalties for violations of this chapter.

(Ord. No. 007-16, § 2, 6-21-2016; Ord. No. 001-22, § 3, 1-18-2022)

Except as otherwise provided in this chapter, the City Manager shall administer, implement, and enforce the provisions of this chapter by coordinating the actions of the Public Works Director, the Finance Director, and any other necessary City department. The primary responsibility for the administration, implementation, and enforcement of the parts of this chapter which relate to billing, collecting, and accounting for the fees and charges established by this chapter is assigned to the Finance Director. The primary responsibility for the administration, implementation, and enforcement of the parts of this chapter related to the operations of the wastewater treatment facility, wastewater collection system, sewer system management plan, pretreatment program, and water treatment plant is assigned to the Public Works Director. The primary responsibility for the administration, implementation, and enforcement of all other parts of this chapter is assigned to the Public Works Director. Any powers granted to, or duties imposed upon, the City Manager, Public Works Director, or Finance Director may be delegated by them to persons acting in the beneficial interests of or in the employ of the City.

(Ord. No. 007-16, § 2, 6-21-2016; Ord. No. 001-22, § 3, 1-18-2022)

The revenues derived under the provisions of this chapter shall be placed in a fund entitled "Wastewater Fund." The accounting of revenues shall be in accordance with the applicable state and/or federal laws and regulations, and revenues may be used for any purpose so authorized.

(Ord. No. 007-16, § 2, 6-21-2016; Ord. No. 001-22, § 3, 1-18-2022)

The following abbreviations, when used in this chapter, shall have the designated meanings:

(Ord. No. 007-16, § 2, 6-21-2016; Ord. No. 001-22, § 3, 1-18-2022)

The following words, terms, and phrases, when used in this chapter, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:

Act or the Act. The term "Act" means the Federal Water Pollution Control Act, also known as the Clean Water Act, as amended, 33 U.S.C. § 1251 et seq.

Administrative order. For the purposes of this chapter, an order issued by the City of Yuba City, City Attorney, or an Administrative Judge of the Superior Court of California, County of Sutter, compelling a user of the City's POTW to perform in some manner. Administrative orders are issued in response to a violation of this Code and State water or health and safety laws, with the legal jurisdiction dictating which legal official issues the order. The orders are generally issued in the form of show cause, compliance, or consent orders depending on the nature and circumstance of noncompliance.

Allowable headworks loading (AHL). The estimated maximum loading of a pollutant received at a POTW's headworks that should not cause the POTW to violate a particular treatment plant or environmental criterion. AHLs are developed to prevent interference or pass through.

Approval authority. The State of California, Regional Water Quality Control Board, Central Valley Region.

Authorized representative of the user.

(a) If the user is a corporation:

(1) The president, secretary, treasurer, or a vice-president of the corporation in charge of a principal business function, or any other person who performs similar policy or decision-making functions for the corporation; or

(2) The manager of one or more manufacturing, production, or operation facilities, provided the manager is authorized to make management decisions that govern the operation of the regulated facility, including having the explicit or implicit duty of making major capital investment recommendations, and initiate and direct other comprehensive measures to assure long-term environmental compliance with environmental laws and regulations; can ensure that the necessary systems are established or actions taken to gather complete and accurate information for individual wastewater discharge permit requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures.

(b) If the user is a partnership or sole proprietorship, a general partner or proprietor, respectively.

(c) If the user is a Federal, State, or local governmental facility, a director or highest official appointed or designated to oversee the operation and performance of the activities of the government facility, or their designee.

(d) The individuals described in paragraph (a)(1) and paragraph (a)(2) above may designate another authorized representative if the authorization is in writing, the authorization specifies the individual or position responsible for the overall operation of the facility from which the discharge originates or overall responsibility for environmental matters for the company, and the written authorization is submitted to the City.

Beneficial uses. Uses of the waters of the State which will be protected against quality degradation, including domestic, municipal, agricultural, and industrial supply, power generation, recreation, aesthetic enjoyment, navigation, the preservation and enhancement of fish, wildlife, and other aquatic resources or reserves, and other uses, both tangible or intangible, as specified by Federal or State law.

Best management practices (BMP). The term "best management practices" or "BMP" means schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to implement the prohibitions listed in 40 CFR 403.5(a)(1) and (b). BMP also includes treatment requirements, operating procedures, and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw materials storage. In addition, BMP means activities, prohibitions, maintenance procedures, and other management practices to prevent or reduce the direct or indirect introduction of FOG into the public sewer.

Biochemical oxygen demand (BOD). The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedures for five days at 20 degrees Celsius, usually expressed as a concentration (e.g., mg/l).

Building sewer or lateral sewer. A sewer conveying the wastewaters of a discharger from a residence, building, or other structure to a community sewer, including direct connections to a community sewer where permitted by the City.

Categorical pretreatment standard or categorical standard. Any regulation containing pollutant discharge limits promulgated by EPA in accordance with Section 307(b) of the Act (33 U.S.C. § 1317) which applies to a specific category of users and which appear in 40 CFR 405—471.

Cesspool. A tank, box, or sump used for the receipt of crude sewage, containing no provision for the nitrification, clarification, or disposal of the sewage, or which discharges such sewage upon the open ground.

Chemical oxygen demand (COD). The measure of chemically decomposable materials in domestic or industrial wastewaters as represented by the oxygen utilized as determined by the appropriate procedure described in "standard methods."

Chlorine demand. The amount of chlorine required to produce a free chlorine residual of 0.1 mg/l after a contact time of 15 minutes as measured by the Idiometric Method on a sample at a temperature of 20 degrees Celsius in conformance with "standard methods."

City. The City of Yuba City public organization.

City Manager. The City Manager of the City of Yuba City.

Collecting sewer. Any City-owned sewer line discharging to another City-owned sewer line such as a trunk line.

Collection system. The portions of the public sewer/collecting sewer consisting of all pipes, sewers, and conveyance systems conveying wastewater to the POTW, excluding service lateral line connections which are not owned by the City.

Commercial building. Any structure, building, or enclosure designed primarily for commercial use other than residential or industrial.

Commercial user. Any user not defined as a residential or industrial user.

Community sewer system. The sewers owned and operated by the City. "Community sewer" shall mean that portion of the community sewer system which receives wastewaters from the service lateral of a discharger.

Compatible pollutant. The biochemical oxygen demand, suspended solids, and pH and fecal coliform bacteria, plus additional pollutants identified in the City's NPDES permit.

Connection. The joining of any structure, building, or facility to any sewer line entering the sewer system of the City for the purpose of discharging sanitary or industrial sewage or wastes.

Contamination. Any impairment of the quality of the waters of the State by wastes to a degree which creates a hazard to the public health through poisoning or the spread of disease.

Council or City Council. City Council of the City of Yuba City.

County. The County of Sutter.

CPC. California Plumbing Code Book, California Code of Regulations Title 24, Part 5.

Daily discharge. Daily discharge is defined as either:

(1) The total mass of the constituent discharged over the calendar day (12:00 a.m. through 11:59 p.m.) or any 24-hour period that reasonably represents a calendar day for purposes of sampling, for a constituent with limitations expressed in units of mass; or

(2) The unweighted arithmetic mean measurement of the constituent over the day for a constituent with limitations expressed in other units of measurement (e.g., concentration).

The daily discharge may be determined by the analytical results of a composite sample taken over the course of one day (a calendar day or other 24-hour period defined as a day) or by the arithmetic mean of analytical results from one or more grab samples taken over the course of the day.

For composite sampling, if one day is defined as a 24-hour period other than a calendar day, the analytical result for the 24-hour period will be considered as the result for the calendar day in which the 24-hour period ends.

Daily maximum. The arithmetic average of all effluent samples for a pollutant collected during a calendar day.

Daily maximum limit. The maximum allowable discharge limit of a pollutant during a calendar day. Where daily maximum limits are expressed in units of mass, the daily discharge is the total mass discharged over the course of the day. Where daily maximum limits are expressed in terms of concentration, the daily discharge is the arithmetic average measurement of the pollutant concentration derived from all measurements taken that day.

Discharger. Any person who discharges or causes a discharge to a public sewer.

Dissolved solids. The solid matter in solution in the wastewaters, which shall be obtained by the evaporation of a sample from which all suspended matter has been removed by filtration as determined by the procedures in "standard methods."

Dwelling unit. Any residence, apartment, habitation, or other structure customarily occupied by a single person or family and which contains facilities for the preparation of meals.

Effluent. The liquid outflow of any facility designed to treat, convey, or retain wastewaters.

Environmental Protection Agency (EPA). The U.S. Environmental Protection Agency or, where appropriate, the Regional Water Management Division Director or other duly authorized official of the agency.

Existing source. Any source of discharge, the construction or operation of which commenced prior to the publication by the EPA of proposed categorical pretreatment standards, which will be applicable to such source if the standard is thereafter promulgated in accordance with Section 307 of the Act.

Fats, oils, and grease (FOG). Any substance such as a vegetable or animal product that is used in or is a byproduct of the cooking or food preparation process and that becomes or may become viscous, or solidifies or may solidify, with a change in temperature or other conditions.

FOG control program. A document prepared and implemented by the City to control FOG (fats, oils, and/or grease).

Food service establishment (FSE). Any facility which prepares and/or packages food or beverages for sale or consumption, on- or off-site, with the exception of private residences, including, but not limited to, food courts, food manufacturers, food packagers, restaurants, grocery stores, bakeries, lounges, bars, hospitals, hotels, nursing homes, churches, and schools.

Garbage. Any solid wastes from the preparation, cooking, and dispensing of food and from the handling, storage, and sale of produce.

Grab sample. A sample which is taken from a waste stream without regard to the flow in the waste stream and over a period of time not to exceed 15 minutes.

Grease-removal device(s). All food service establishments that discharge wastewater to the City's wastewater collection system are required to have City-approved and properly sized grease-removal devices, also commonly referred to as "grease traps" or "grease interceptors."

Both devices are primary grease-removal devices that separate and retain free-floating FOG. The differences between the two types of grease-removal devices are primarily the size and physical location of the unit.

Indirect discharge or discharge. The introduction of pollutants into the POTW from any non-domestic source regulated under Sections 307(b), (c), or (d) of the Act.

Industrial wastewater or industrial user (IU). Shall mean as defined in Article 4 of this chapter.

Insignificant violation. Any violation that is not by definition defined as significant non-compliance (SNC).

Inspector. A person authorized by the Public Works Director to inspect wastewater generation, conveyance, processing, and disposal facilities.

Instantaneous maximum allowable discharge limit. The maximum concentration of a pollutant allowed to be discharged at any time, determined from the analysis of any discrete or composited sample collected, independent of the industrial flow rate and the duration of the sampling event.

Interference. A discharge, which alone or in conjunction with a discharge or discharges from other sources, inhibits or disrupts the POTW, its treatment processes, or operations or its sludge processes, use, or disposal, and, therefore, is a cause of a violation of the City's NPDES permit (including an increase in the magnitude or duration of a violation) or causes the prevention of sewage sludge use or disposal in compliance with any of the following statutory/regulatory provisions or permits issued hereunder, or any more stringent State or local regulations: Section 405 of the Act; the Solid Waste Disposal Act (SWDA), including Title II, commonly referred to as the Resource Conservation and Recovery Act (RCRA); any State regulations contained in any State sludge management plan prepared pursuant to Subtitle D of the Solid Waste Disposal Act); the Clean Air Act; the Toxic Substances Control Act; and the Marine Protection, Research, and Sanctuaries Act.

Lot or parcel. A lot or parcel of land consisting of one lot of record in one ownership.

Main sewer or sewer main. A portion of the community sewer system located in a street or public easement which receives wastewater from the service lateral of a discharger and is designated to accommodate more than one service lateral.

Maximum allowable concentration. The maximum concentration of a pollutant which may be discharged from an IU into the City's collection system. Unless dictated by superseding regulations (i.e., national pretreatment or categorical standards), the maximum allowable concentration may be taken as a grab or composite sample at the discretion of the Public Works Director.

Maximum allowable headworks loading (MAHL). The estimated maximum loading of a pollutant that can be received at a POTW's headworks without causing pass through or interference. The most protective (lowest) of the AHLs estimated for a pollutant.

Maximum allowable industrial loading (MAIL). The estimated maximum loading of a pollutant that can be received at a POTW's headworks from all permitted industrial users and controlled sources without causing pass through or interference. The MAIL is usually calculated by applying a safety factor to the MAHL and discounting for uncontrolled sources, hauled wastewater, and growth allowance.

Medical waste. Isolation wastes, infectious agents, human blood and blood products, pathological wastes, sharps, body parts, contaminated bedding, surgical wastes, potentially contaminated laboratory wastes, and dialysis wastes.

Monthly average. The sum of all daily discharges measured during a calendar month divided by the number of daily discharges measured during that month.

Monthly average limit. The highest allowable average of "daily discharges" over a calendar month, calculated as the sum of all "daily discharges" measured during a calendar month divided by the number of "daily discharges" measured during that month. New source.

(a) Any building, structure, facility, or installation from which there is (or may be) a discharge of pollutants, the construction of which commenced after the publication of proposed pretreatment standards under Section 307(c) of the Act which will be applicable to such source if such standards are thereafter promulgated in accordance with that section, provided that:

(1) The building, structure, facility, or installation is constructed at a site at which no other source is located;

(2) The building, structure, facility, or installation totally replaces the process or production equipment that causes the discharge of pollutants at an existing source; or

(3) The production or wastewater generating processes of the building, structure, facility, or installation are substantially independent of an existing source at the same site. In determining whether these are substantially independent, factors such as the extent to which the new facility is integrated with the existing plant and the extent to which the new facility is engaged in the same general type of activity as the existing source should be considered.

(b) Construction on a site at which an existing source is located results in a modification rather than a new source if the construction does not create a new building, structure, facility, or installation meeting the criteria of subsection (a)(1) or (a)(2) above but otherwise alters, replaces, or adds to existing process or production equipment.

(c) Construction of a new source as defined under this paragraph has commenced if the owner or operator has:

(1) Begun, or caused to begin, as part of a continuous on-site construction program:

(i) Any placement, assembly, or installation of facilities or equipment; or

(ii) Significant site preparation work, including clearing, excavation, or removal of existing buildings, structures, or facilities which is necessary for the placement, assembly, or installation of new source facilities or equipment.

(2) Entered into a binding contractual obligation for the purchase of facilities or equipment which is intended to be used in its operation within a reasonable time. Options to purchase or contracts which can be terminated or modified without substantial loss, and contracts for feasibility, engineering, and design studies do not constitute a contractual obligation under this paragraph.

Non-contact cooling water. Water used for cooling, which does not come into direct contact with any raw material, intermediate product, waste product, or finished product.

North American Industrial Classification System (NAICS). U.S. Census Bureau business classification system.

Outside user. Any person responsible for the payment of sewer service fees for premises served outside the City limits.

Pass through. A discharge which exits the POTW into waters of the United States in quantities or concentrations which, alone or in conjunction with a discharge or discharges from other sources, is a cause of a violation of any requirement of the City's NPDES permit, including an increase in the magnitude or duration of a violation.

Person. Any individual, partnership, co-partnership, firm, company, corporation, association, joint stock company, trust, estate, governmental entity, or any other legal entity, or their legal representatives, agents, or assigns. This definition includes all Federal, State, and local governmental entities.

pH. A measure of the acidity or alkalinity of a solution, expressed in standard units.

Pollutant. Dredged spoil, solid waste, incinerator residue, filter backwash, sewage, garbage, sewage sludge, munitions, medical wastes, chemical wastes, biological materials, radioactive materials, heat, wrecked or discarded equipment, rock, sand, cellar dirt, municipal wastes, agricultural wastes, and industrial wastes, and certain characteristics of wastewater (e.g., pH, temperature, TSS, turbidity, color, BOD, COD, toxicity, or odor).

Premises. Any lot, piece, or parcel of land, any building or other structure, or any part of any building or structure used or useful for human habitation or gathering or carrying on any business or occupation.

Pretreatment. The reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater prior to, or in lieu of, introducing such pollutants into the POTW. This reduction or alteration can be obtained by physical, chemical, or biological processes; by process changes; or by other means, except by diluting the concentration of the pollutants unless allowed by an applicable pretreatment standard.

Pretreatment requirements. Any substantive or procedural requirement related to pretreatment, other than a National Pretreatment Standard, imposed on an industrial user.

Pretreatment standard or standard. The terms "National Pretreatment Standard," "pretreatment standard," or "standard" mean any regulation containing pollutant discharge limits promulgated by the EPA in accordance with Sections 307(b) and (c) of the Act, which applies to industrial users. This term includes prohibitive discharge limits established pursuant to Section 403.5.

Private sewer. That portion of a sewer serving an independent sewage disposal system, not connected with a public sewer, and which accommodates one or more buildings or industries.

Prohibited discharge standards or prohibited discharges. Absolute prohibitions against the discharge of certain substances; these prohibitions appear in Section 6-5.207.

Public sewer. The main line sewer constructed in a street, highway, alley, place, or right-of-way dedicated to public use. "Public sewer" shall not include a house connection sewer or service lateral.

Public Works Director or Director. The Public Works Director of the City or such other person as may be designated by the Public Works Director to perform the services or make the determinations permitted or required under this chapter to be made by the Public Works Director.

Publicly owned treatment works (POTW). A "treatment works," as defined by Section 212 of the Act (33 U.S.C. § 1292) which is owned by the City. This definition includes any devices or systems used in the collection, storage, treatment, recycling, and reclamation of municipal sewage or industrial wastes of a liquid nature. It also includes sewers, pipes, and other conveyances only if they convey wastewater to a POTW treatment plant. The term also means the municipality as defined in Section 502(4) of the Act, which has jurisdiction over the indirect discharges to and the discharges from such a treatment works.

Radioactive material. A material containing chemical elements that spontaneously change their atomic structure by emitting any particles, rays, or energy forms.

Receiving water quality standards. The requirements for City treatment plant effluent established by law or by State or Federal regulatory agencies for the protection of receiving water quality. Said standards shall include effluent limitations and waste discharge standards, requirements, limitations, or prohibitions which may be established, amended, or adopted by State or Federal laws or regulatory agencies.

Residential user. Any user whose premises are used solely for residential purposes.

Sanitary sewage. The waste discharging into the City sewage system which contains human or animal excreta.

Sanitary sewer overflow (SSO). Any overflow, spill, release, discharge, or diversion of untreated or partially-treated wastewater from a sanitary sewer system, including overflows or releases that reach waters of the United States, overflows or releases that do not reach the waters of United States, and backups into buildings and/or private property caused by conditions within the publicly owned portion of the sewer system.

Septic tank system. A system of reservoirs or tanks which receive sanitary sewage and by septic bacterial action affect the decomposition and settlement of settleable solids and the diversion of the septic liquid for clarification and purification which take place by further bacterial action in percolation ducts extending into natural or prepared porous subsoil beds.

Septic tank waste. Any sewage from holding tanks such as vessels, chemical toilets, campers, trailers, and septic tanks.

Service lateral. A sewer conveying the wastewaters of a discharger from a residence, building, or other structure(s) to a community sewer, including direct connections to a community sewer where permitted by the City.

Sewage. Human excrement and gray water (household showers, dishwashing operations, etc.), which is a constituent of wastewater.

Sewage lift station. Any facility designed and constructed to raise wastewaters in elevation or to overcome head losses due to pipeline friction.

Sewage treatment plant. Any arrangement of devices and structures for treating sewage.

Sewer system management plan (SSMP). A document prepared by the City that describes the activities to manage the wastewater collection system.

Sewerage system or sewer system. The services and facilities for the treatment and disposal of industrial wastes and sanitary sewage.

Shall and may. "Shall" is mandatory and "may" is permissive.

Significant industrial user (SIU).

(a) A user subject to categorical pretreatment standards; or a user that:

(1) Discharges an average of 25,000 gpd or more of process wastewater to the POTW (excluding sanitary, non-contact cooling, and boiler blowdown wastewater);

(2) Contributes a process waste stream which makes up 5% or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant; or

(3) Is designated as such by the City on the basis that it has a reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement.

(b) The City may determine that an industrial user subject to categorical pretreatment standards is a non-significant categorical industrial user rather than a significant industrial user on a finding that the industrial user never discharges more than 100 gpd of total categorical wastewater (excluding sanitary, non-contact cooling, and boiler blowdown wastewater, unless specifically included in the pretreatment standard) and the following conditions are met:

(1) The industrial user, prior to the City's finding, has consistently complied with all applicable categorical pretreatment standards and requirements;

(2) The industrial user annually submits the certification statement required in Section 6-5.402.F(b), together with any additional information necessary to support the certification statement; and

(3) The industrial user never discharges any untreated concentrated wastewater.

(c) Upon finding that a user meeting the criteria in subsection (b) has no reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement, the City may, at any time, on its own initiative or in response to a petition received from a user and in accordance with procedures in 40 CFR 403.8(f)(6), determine that such user should not be considered a significant industrial user.

Slug load or slug discharge. Any discharge at a flow rate or concentration which could cause a violation of the prohibited discharge standards in Article 2 of this chapter. A slug discharge is any discharge of a non-routine, episodic nature, including but not limited to an accidental spill or a non-customary batch discharge, which has a reasonable potential to cause interference or pass through, or in any other way violate the POTW's regulations, local limits, or permit conditions.

Standard Industrial Classification (SIC). A classification pursuant to the Standard Industrial Classification Manual issued by the United States Office of Management and Budget.

Standard methods. The procedures described in the latest edition of "Standard Methods for the Examination of Water and Wastewater" as published by the American Public Health Association, the American Water Works Association, and the Water Environment Federation. Elements of wastewater strength shall be measured by "standard methods" unless otherwise expressly stated.

Standard specifications. A set of documents including standard details and special provisions containing design and construction standards for all sewerage works within the City. The edition of standard specifications in place at the time of permit issuance/approval shall rule.

Stormwater. Any flow occurring during or following any form of natural precipitation and resulting from such precipitation, including snowmelt.

Suspended solids. The total suspended matter that floats on the surface of or is suspended in water, wastewater, or other liquid, and which is removable by laboratory filtering.

Trade secrets. Any formula, plan, pattern, process, tool, mechanism, compound, procedure, production data, or compilation of information which is not patented and is known only to certain individuals within a commercial concern who are using it to fabricate, produce, or compound an article of trade or a service having commercial value and which gives its user an opportunity to obtain a business advantage over competitors who do not know or use it.

Trailer court. Any parcel of land designed for residential use with two or more mobile homes, travel trailers, pickup campers, or motor homes.

Trunk sewer. A sewer constructed, maintained, and operated by the City which conveys wastewaters to the City's treatment facilities and into which service laterals and collecting sewers discharge.

Uncontaminated water. Any wasted water of the community not contaminated or polluted with wastewaters and which is suitable or could readily be made suitable for discharge to the municipal stormwater drainage system.

User or industrial user. A source of indirect discharge. Also defined as any person responsible for the payment of the sewer service charges for premises served as provided in this chapter.

Waste. Sewage and any and all other waste substances, including gaseous or radioactive substances, associated with human habitation, or of human or animal origin, or from any producing, manufacturing, or processing operation of whatever nature.

Wastewater. Liquid and water-carried industrial wastes and sewage from residential dwellings, commercial buildings, industrial and manufacturing facilities, and institutions, whether treated or untreated, which are contributed to the POTW.

Wastewater strength. The quality of wastewaters discharged as measured by its elements, including its constituents and characteristics.

Wastewater treatment plant, wastewater treatment facility, or water reclamation facility treatment plant. That portion of the POTW which is designed to provide treatment of municipal sewage/wastewater and industrial waste.

(Ord. No. 007-16, § 2, 6-21-2016; Ord. No. 001-22, § 3, 1-18-2022)