ACT OR THE ACT: The federal Water Pollution Control Act, also known as the Clean Water Act, as amended, 33 USC section 1251 et seq., and any subsequent amendments thereto.

APPROVAL AUTHORITY: The state of Utah, Department of Environmental Quality, Division of Water Quality (DWQ), or its successor agency.

AUTHORIZED OR DULY AUTHORIZED REPRESENTATIVE OF THE USER:

BEST MANAGEMENT PRACTICES OR BMP: The schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to implement the prohibitions listed in subsections 8-4-2-1A and B of this chapter. BMPs include, but are not limited to, treatment requirements, operating procedures and practices to control plant site runoff, spillage, leaks, sludge, waste disposal, or drainage from raw materials storage. BMPs may be developed by the pretreatment program as a local limit to control discharges from SIU as needed.

BIOCHEMICAL OXYGEN DEMAND OR BOD: The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedures for five (5) days at twenty degrees centigrade (20°C), usually expressed as a concentration (e.g., mg/l).

BYPASS: The intentional diversion of waste streams from any portion of a user’s treatment facility.

CATEGORICAL INDUSTRIAL USER OR CIU: An industrial user subject to a categorical pretreatment standard or categorical standard.

CATEGORICAL PRETREATMENT STANDARD OR CATEGORICAL STANDARD: Any regulation containing pollutant discharge limits promulgated by EPA, in accordance with sections 307(b) and (c) of the act (33 USC section 1317), that apply to a specific category of users, and that appear in 40 CFR chapter I, subchapter N, parts 405 – 471.

CHEMICAL OXYGEN DEMAND OR COD: A measure of the oxygen required to oxidize all compounds, both organic and inorganic, in water.

CITY: The city of St. George, state of Utah.

COLOR: The optical density at the visual wavelength of maximum absorption, relative to distilled water. One hundred percent (100%) transmittance is equivalent to zero (0.0) optical density.

COMPOSITE SAMPLE: The samples resulting from the combination of individual wastewater samples taken at selected intervals based on an increment of either flow or time, to minimize the effect or the variability of the individual samples. This sampling should be in accordance with 40 CFR part 403, appendix E, subpart I – Composite Method.

CONTROL AUTHORITY: The St. George regional water reclamation facility or SGRWRF.

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 a concentration, the daily discharge is the arithmetic average measurement of the pollutant concentration derived from all measurements taken that day.

ENVIRONMENTAL PROTECTION AGENCY OR EPA: The U.S. Environmental Protection Agency or, where appropriate, the regional water management division director, the regional administrator, or other duly authorized official of said agency.

EXISTING SOURCE: Any source of discharge that is not a “new source.”

GRAB SAMPLE: A sample that is taken from a waste stream, without regard to the flow in the waste stream, and over a period of time not to exceed fifteen (15) minutes.

HAZARDOUS WASTE: Waste as defined in 40 CFR section 261.3, incorporated herein and made a part hereof.

INDIRECT DISCHARGE OR DISCHARGE: The introduction of pollutants into the POTW from any nondomestic source which is regulated under section 307(b), (c) or (d) of the act (including septage waste discharged into the POTW).

INSTANTANEOUS LIMIT: The maximum or minimum concentration (or load) of a pollutant allowed to be discharged at any time, determined from the analysis of any discrete, grab or composited sample collected, independent of the industrial flow rate and the duration of the sampling event.

INTERFERENCE: A discharge that 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; therefore, it is a violation of SGRWRF’s UPDES permit, or of the prevention of sewage sludge use or disposal in compliance with any of the following statutory/regulatory provisions or permits issued thereunder, or any more stringent state or local regulations, including, but not limited to (A) section 405 of the Act; (B) the Solid Waste Disposal Act, including Title II commonly referred to as the RCRA; (C) any state regulations contained in any state sludge management plan prepared pursuant to subtitle D of the Solid Waste Disposal Act; (D) the Clean Air Act; (E) the Toxic Substances Control Act; and (F) the Marine Protection, Research, and Sanctuaries Act.

LOCAL LIMIT: Specific discharge limits developed to protect the POTW in accordance with 40 CFR section 403.5 and enforced by SGRWRF upon industrial or commercial facilities to implement the general and specific discharge prohibitions listed in subsections 8-4-2-1A and B of this chapter. The technically based local limits and development documents are kept on file at the SGRWRF office and can be reviewed if requested.

MANAGER: The person designated by the city to supervise the operation of the POTW, and who is charged with certain duties and responsibilities by this chapter. “Manager” also means a duly authorized representative of the manager.

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:

NONCONTACT COOLING WATER: Water used for cooling that does not come into direct contact with any raw material, intermediate product, waste product, or finished product.

PASS-THROUGH: A discharge which exits the POTW into waters of the state 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 SGRWRF’s UPDES permit, including an increase in the magnitude or duration of a violation.

PERSON: Any individual, partnership, copartnership, firm, company, corporation, limited liability company, 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 basicity of a solution, expressed in standard units.

POLLUTANT: Any pollutant, including, but not limited to, dredged spoils; 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, agricultural and industrial wastes; and, certain characteristics of wastewater (e.g., pH, temperature, TSS, turbidity, color, BOD, COD, toxicity, or odor).

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 a) physical, chemical, or biological processes; b) process changes; or c) other means. Pretreatment cannot be obtained by diluting the concentration of the pollutants, unless allowed by an applicable pretreatment standard.

PRETREATMENT COORDINATOR: The person designated by SGRWRF to coordinate the SGRWRF pretreatment program, charged with certain duties and responsibilities under this chapter as directed and delegated by the manager. A technically skilled position, the pretreatment coordinator, or his or her designee, performs surveillance, administrative duties, and related work in monitoring compliance, and is a liaison with IUs of the SGRWRF.

PRETREATMENT STANDARDS OR STANDARDS: Pretreatment standards shall mean any regulation containing pollutant discharge limits promulgated by the EPA in accordance with section 307(b) and (c) of the act, which applies to IUs, which includes, but is not limited to, prohibited discharge standards, categorical pretreatment standards, and local limits.

PROHIBITED DISCHARGE STANDARDS OR PROHIBITED DISCHARGES: Absolute prohibitions against the discharge of certain substances; these prohibitions appear in section 8-4-2-1 of this chapter.

PUBLICLY OWNED TREATMENT WORKS OR POTW: A treatment works, as defined by section 212 of the Act (33 USC section 1292), which is owned by the SGRWRF. This definition includes any devices or systems used in the collection, storage, treatment, recycling, and reclamation of sewage or industrial wastes of a liquid nature, and any conveyances, which convey wastewater to a treatment plant. It also includes sewers, pipes and other conveyances if they convey wastewater to a POTW. 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.

SEPTIC TANK WASTE: Any sewage from holding tanks such as vessels, chemical toilets, campers, trailers, and septic tanks.

SEWAGE: Human excrement and gray water (household showers, dishwashing operations, etc.).

SIGNIFICANT INDUSTRIAL USER (SIU): Except as provided in subsection C of this definition, a significant industrial user is:

SLUG LOAD OR SLUG DISCHARGE: Any discharge at a flow rate or concentration, which could cause a violation of the prohibited discharge standards in section 8-4-2-1 of this chapter. A slug discharge is any discharge of a nonroutine, episodic nature, including, but not limited to, an accidental spill or a noncustomary batch discharge, which has a reasonable potential to cause interference or pass-through, or in any other way violates the POTW’s regulations, local limits or permit conditions.

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

TOTAL SUSPENDED SOLIDS, OR TSS, OR SUSPENDED SOLIDS: The total suspended matter that floats on the surface of, or is suspended in, water, wastewater, or other liquid, and that is removable by laboratory filtering.

UPSET: Any exceptional incident in which there is unintentional and temporary noncompliance with categorical pretreatment standards because of factors beyond the reasonable control of the user. Upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.

USER, OR INDUSTRIAL USER, OR IU: A source of indirect discharge.

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

WASTEWATER TREATMENT PLANT OR TREATMENT PLANT: The portion of the POTW which is designed to provide treatment of municipal sewage and industrial waste.

WATERS OF THE STATE¹: All streams, lakes, ponds, marshes, watercourses, waterways, wells, springs, irrigation systems, drainage systems, and all other bodies or accumulations of water, surface and underground, natural or artificial, public or private, which are contained within, flow through, or border upon this state or any portion thereof. Waters of the state does not include bodies of water confined to, and retained within, the limits of private property, and which do not develop into or constitute a nuisance, or a public health hazard, or a menace to fish and wildlife. (Ord. 2016-11-005, 11-10-2016)