Unless a provision explicitly states otherwise, the following terms and phrases, as used in this chapter, shall have the meanings hereinafter designated:
Act or the act.The Federal Water Pollution Control Act, § 101 et seq., also known as the Clean Water Act, as amended, 33 U.S.C. §
1251 et seq.
The Regional Administrator of the EPA or the Director of the TCEQ where the state has been delegated NPDES permit authority and has an approved pretreatment program.
Approved.The city accepts as satisfactory, based upon the data available, or that there is not an objection with the proposal submitted. However, it is not the city's responsibility to certify that such acceptance will actually demonstrate compliance with existing or future regulations. It is the sole responsibility of the person seeking approval to demonstrate compliance with this chapter or other applicable regulations.
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
The manager of one or more manufacturing, production, or operating 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.
If the user is a partnership or sole proprietorship: a general partner or proprietor, respectively.
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.
The individuals described in divisions (A) through (C) 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 having overall responsibility for environmental matters for the company, and the written authorization is submitted to the city.
Best management practices or BMPs.Schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to implement the prohibitions listed in section
171.04(A) and (B) [40 Code of Federal Regulations (CFR)
403.5(a)(1) and
(b)]. BMPs include treatment requirements, operating procedures, and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw materials storage.
The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedures for five (5) days at 20° Celsius (68° Fahrenheit), usually expressed as a concentration (e.g., mg/L).
Chain of custody.A written record of sample possession for all persons who handle (collect, transport, analyze, dispose of) a sample, including names, dates, times and procedures followed. The purpose is to ensure the integrity of the sample so that it may be admissible as evidence in court.
Chemical oxygen demand or COD.Measure of the oxygen consuming capacity of inorganic or organic matter present in the water or wastewater, expressed in mg/L as the amount of oxygen consumed from a chemical oxidant in a specific test, but not differentiating between stable and unstable organic matter, and thus not necessarily correlating with BOD.
City.The City of Carrollton, or any delegated personnel or authorized representatives of the municipality.
Composite sample.A sample that is collected over time formed either by continuous sampling or by mixing discrete or grab samples. The sample may be composited either as a:
(A) Time proportional composite sample: composed of discrete sample aliquots collected at constant time intervals, providing a sample irrespective of stream flow; or as a
Flow proportional composite sample: collected either as a constant sample volume at time intervals proportional to flow or collected by increasing the volume of each aliquot as the flow increases, while maintaining a constant time interval between the aliquots.
Control manhole.A manhole giving access to a building sewer at some point before the building sewer discharge mixes with other discharges in the public sewer.
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.
Designated city official or DCO.The person designated by the city who is charged with certain duties and responsibilities by this chapter. The term also means a duly authorized representative of the City Manager.
Discharge.To deposit, conduct, drain, emit, throw, run, cause, allow to seep or otherwise release or dispose of, or to cause, allow, permit or suffer any of these acts or omissions, or the act of discharging.
Enforcement response plan.A policy document by the DCO, required by 40 CFR
403.9, that describes the city's pretreatment program, includes general and specific user requirements, contains pretreatment enforcement criteria and procedures, outlines available enforcement actions and is a guide for implementing enforcement responses.
The U.S. Environmental Protection Agency or, where appropriate, the Regional Water Management Division Director, or other duly authorized official of said agency.
Existing source.Any source of discharge, the construction or operation of which commenced prior to the publication by 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.
Extra-jurisdictional user.A user the city has determined requires a permit to discharge, other than a local government, which is located outside the jurisdiction of the city, and which discharges or plans to discharge to the POTW.
Grab sample.A sample which is collected from a wastestream without regard to the flow in the wastestream and over a period of time not to exceed fifteen (15) minutes.
Indirect discharge or discharge.The introduction of pollutants into the POTW from any nondomestic source regulated under Section 307(b), (c), or (d) of the act.
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.
Interceptor.A device designed to skim, settle or otherwise remove grease, oil, sand, flammable wastes or other harmful substances.
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 Control Authority's NPDES or TPDES 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: Section 405 of the act; the Solid Waste Disposal Act, including Title II commonly referred to as the Resource Conservation and Recovery Act (RCRA); 40 CFR
503 sludge regulations; any state regulations contained in any state sludge management plan prepared pursuant to Subtitle D of the Solid Waste Disposal Act and 30 TAC
312; the Clean Air Act; the Toxic Substances Control Act; and the Marine Protection, Research, and Sanctuaries Act.
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.
National pollutant discharge elimination system (NPDES).National Pollutant Discharge Elimination System permit program of the Environmental Protection Agency, or the permit program of the state agency delegated to act on EPA's behalf with an approved pretreatment program (e.g., TPDES or Texas Pollutant Discharge Elimination System).
Natural outlet.Any outlet into a watercourse, pond, ditch, lake, or other body of surface or ground water.
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 the 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; or
The building, structure, facility, or installation totally replaces the process or production equipment that causes the discharge of pollutants at an existing source; or
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.
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)(2) or (3) above, but otherwise alters, replaces, or adds to existing process or production equipment.
Construction of a new source as defined under this section has commenced if the owner or operator has:
(1) Begun, or caused to begin, as part of a continuous on-site construction program:
(a) Any placement, assembly, or installation of facilities or equipment; or
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; or
Entered into a binding contractual obligation for the purchase of facilities or equipment which are 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.
Noncontact cooling water.Water used for cooling which does not come into direct contact with any raw material, intermediate product, waste product, or finished product.
Normal wastewater.Wastewater which the average concentration of total suspended solids (TSS) and five (5) day BOD does not exceed two hundred and fifty (250) mg/L each, and which has characteristics typical of domestic wastewater.
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 Control Authority's NPDES or TPDES permit, including an increase in the magnitude or duration of a violation.
Person.Any individual, partnership, copartnership, 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, petroleum products, mechanical fluids from vehicles or equipment, 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 physical, chemical, or biological processes; by process changes; or by other means, except by diluting the concentration of the pollutants unless specifically allowed by an applicable pretreatment standard.
Pretreatment requirements.Any substantive or procedural mandate related to pretreatment imposed on a user, other than a pretreatment standard, (e.g., wastewater discharge permit conditions and modifications, enforcement response plan directives, and administrative enforcement remedies).
Process wastewater.Water that comes into direct contact with or results from the production or use of any raw material, intermediate product, finished product, byproduct, waste product, or wastewater, and/or as defined in a National Pretreatment Standard.
Publicly owned treatment works or POTW.A "treatment works," as defined by Section 212 of the Act (33 U.S.C. §
1292) which is owned by the city and/or the Control Authority. 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, (e.g., the sanitary sewer system and treatment plant).
Any sewage from holding tanks such as (e.g., vessels, chemical toilets, campers, trailers, motor homes and septic tanks).
Sewage.Refuse liquids and waste matter, including human excreta, household or domestic type wastewater, graywater (from household showers, bathtubs, dishwashing, or clothes washing operations), but not wastes from commercial or industrial processes.
Sewer.Any pipe or conduit used to collect and carry away liquids, e.g., sewage or stormwater from the generating sources to treatment plants or receiving streams. Public sewers are subject to the control of the city and may be used by owners of abutting properties. A sanitary sewer is a public sewer, part of the POTW that is designed to convey wastewater, and not storm, surface or groundwater. A building sewer is the privately maintained extension from the building drains to the public sanitary sewer (also called house lateral or house connection). Sewers in this chapter refer to sanitary sewers. A storm sewer or storm drainage system is a public sewer designed to convey storm and surface water and drainage, and from which wastewater and pollutants are prohibited. A combined sewer to carry both stormwater runoff and wastewater (e.g., sewage) is prohibited.
Shall.Expression of a mandatory instruction or command; may is permissive or discretionary.
Significant industrial user (SIU).(A) SIUs.
(1) A user subject to categorical pretreatment standards; or
A user that:
(a) Discharges an average of twenty-five thousand (25,000) gallons per day (gpd) or more of process wastewater to the POTW (excluding sanitary, noncontact cooling water, and boiler blowdown wastewater);
Contributes a process wastestream which makes up 5% or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant; or
Is designated as such by the city on the basis that the user has a reasonable potential for adversely affecting the POTW's operation or for violating any pretreatment standard or requirement.
Upon a finding that a user meeting the criteria in subsection
(2) 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(t)(6), determine that the user should not be considered a SIU.
NSCIUs.
(1) The city may determine that an industrial user subject to categorical pretreatment standards is a Non-Significant Categorical Industrial User (NSCIU) rather than a SIU on a finding of any of the three criteria below:
(a) The industrial user never discharges more than one hundred (100) gpd of total categorical wastewater (excluding sanitary, non-contact cooling and boiler blowdown wastewater, unless specifically included in the pretreatment standard);
The industrial user is required by a categorical pretreatment standard to not discharge categorical wastewater. An industrial user that meets this criteria shall continue to be prohibited from discharging categorical wastewater; or
The industrial user is subject to numeric categorical pretreatment standard(s) and does not discharge categorical wastewater.
The following conditions must be met for an industrial user classified as a NSCIU:
(a) The industrial user, prior to city's finding, has consistently complied with all applicable categorical pretreatment standards and requirements;
The industrial user annually submits the certification statement required in section
171.20(C) [see 40 CFR
403.12(q)], together with any additional information necessary to support the certification statement; and
The industrial user never discharges any untreated concentrated wastewater.
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
171.04 of this chapter. A slug discharge is any discharge of a non-routine, episodic nature, including but not limited to accidental spill or a non-customary batch discharge, which has a reasonable potential to cause interference or pass through, or in any way violate the POTW's regulations, local limits or permit conditions.
Any flow occurring during or following any form of natural precipitation, and resulting from such precipitation, including snowmelt.
Total suspended solids or TSS.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.
Total toxic organics or TTO.The sum of the masses or concentrations of the toxic organic compounds listed in 40 CFR
122 Appendix D, Table II, excluding pesticides, found in industrial users' discharges at a concentration greater than 0.01 mg/L. For categorical SIUs, with categorical TTO monitoring requirements, TTO parameter selection is specific to the federal category.
Any person who discharges, or desires to discharge, to the POTW:
(A) Any mixture of waste (resulting from any process of industry, manufacturing, trade or business) with water or normal wastewater; or
Wastewater distinct from normal wastewater.
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.
(Ordinance 4229 adopted 9/24/2024)