Unless the context specifically indicates otherwise, the meaning of the terms and phrases used in this division shall be as follows:
Act.The Federal Water Pollution Control Act, Public Law 92-500, known as the Clean Water Act (CWA), as amended, 33 U.S.C. 1251 et seq.
Alternate city.For the purposes of this division, refers to any city, other than Mesquite, receiving and treating wastewater originating from the City of Mesquite.
Approval authority.The director in a National Pollutant Discharge Elimination System (NPDES) state with an approved state pretreatment program and the appropriate regional administrator in a non-NPDES state or NPDES state without an approved state pretreatment program.
BOD (biochemical oxygen demand).The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory conditions for five (5) days at twenty (20) degrees Celsius expressed in mg/L. The laboratory determination shall be made in accordance with the procedures set forth in 40 CFR 136.
Building drain.That part of the lowest horizontal piping of a drainage system which receives the discharge from soil, waste, and other drainage pipes inside the walls of the building and conveys to the building sewer, which begins three (3) feet outside the inner face of the building wall.
Building sewer.The extension from the building drain to the sewer lateral at the property line or other lawful place of disposal (also called house lateral or house connection).
Bypass.The intentional diversion of wastestreams from any portion of an industrial user’s treatment facility.
Categorical standards.The national categorical pretreatment standards found in chapter 40 of the Code of Federal Regulations (CFR), parts 405–471 and amendments thereof, or pretreatment standards developed under 33 U.S.C. 1317 of the Act.
COD (chemical oxygen demand).The measure of the oxygen-consuming capacity of inorganic and organic matter present in water or wastewater. It is expressed in mg/L as the amount of oxygen consumed from a chemical oxidant in a specific test. It does not differentiate between stable and unstable organic matter and thus does not necessarily correlate with BOD.
Control authority.Shall mean:
(1) The owner/operator of the POTW;
(2) The person designated by the town to be responsible for the industrial pretreatment program or its duly authorized representative.
Control manhole.A manhole giving access to a building sewer [at a] point before the building sewer discharges into the public sewer.
Daily discharge.The discharge of a pollutant measured during a calendar day or any twenty-four-hour period that reasonably represents a calendar day for purposes of sampling.
Daily maximum.The highest allowable “daily discharge” during a calendar month.
Director.The chief administrative officer of a state or interstate water pollution control agency with an NPDES permit program approved pursuant to section 402(b) of the Act and an approved state pretreatment program.
Disposal.The discharge, deposit, injection, dumping, spilling, leaking, or placing of any solid or semi-solid waste (i.e., grease trap waste, grit trap wastes, and/or septage) into or on any land or water so that such waste or any constituent thereof may enter the environment or be emitted into the air or discharged into any water, including, but not limited to, groundwaters.
Domestic sewage.The water-borne wastes normally discharging into the sanitary conveniences of dwellings (including apartment houses and hotels), office buildings, factories and institutions, free of stormwater and industrial wastes.
EPA (Environmental Protection Agency).The U.S. Environmental Protection Agency, or, where appropriate, the term may also be used as a designation for the administrator or other duly authorized officials of said agency.
Flow proportioned composite sample.A sample collected either as a constant sample volume at time intervals proportional to stream flow, or collected by increasing the volume of each aliquot as the flow increases while maintaining a constant time interval between the aliquots.
Garbage.Animal and vegetable wastes and residue from preparation, cooking, and dispensing of food, and from handling, processing, storage, and sale of food products and produce.
Grab sample.An individual sample collected over a period of time not exceeding fifteen (15) minutes.
Grease trap.A watertight receptacle designed and constructed to intercept and prevent the passage of greasy, fatty liquid, semi-liquid, and/or solid wastes into the sanitary sewer system to which the receptacle is directly or indirectly connected.
Grease trap waste.Any greasy, fatty liquid, semi-liquid, and/or solid wastes removed by a grease trap.
Grit/sand trap.A watertight receptacle designed and constructed to intercept and prevent the passage of sand, grit and other heavy solids into the sanitary sewer system to which the receptacle is directly or indirectly connected.
Grit trap waste.Any sand, grit and/or other heavy solids removed from a grit trap.
Hazardous waste.Any liquid, semi-liquid or solid waste (or combination of wastes), which because of its quantity, concentration, or physical, chemical or infectious characteristics may:
(1) Have any of the following characteristics: toxic, corrosive, an irritant, a strong sensitizer, flammable or combustible, explosive, or otherwise capable of causing substantial personal injury or illness;
(2) Pose a substantial hazard to human health or the environment when improperly treated, stored, transported, or disposed of, or otherwise improperly managed, and is identified or listed as a hazardous waste as defined by the Texas Solid Waste Disposal Act or defined under 40 CFR part 261.3.
Holding tank waste.Any waste from holding tanks such as vessels, chemical toilets, campers, trailers, septic tanks, and vacuum pump tank trucks.
Industrial user wastewater surcharge.The additional charge made on those persons or industries who discharge industrial wastes into the sewer system which are amenable to treatment by the POTW treatment processes, but which exceed “normal” strength sewage.
Industrial waste.The water-borne solids, liquids, or gaseous wastes resulting from and discharged, permitted to flow or escaping from any industrial, manufacturing or food processing operation or process, or from the development of any natural resources, or any mixture of these with water or domestic sewage as distinct from normal domestic sewage.
Interference.A discharge which, either alone or in conjunction with a discharge or discharges from other sources, both:
(1) Inhibits or disrupts the POTW, its treatment processes or operations, or its sludge processes, use or disposal; and
(2) Is the cause of a violation of any requirement of the POTW’s NPDES permit (including an increase in the magnitude or duration of a violation) or of the prevention of sewage sludge use or disposal by the POTW in compliance with the following statutory provisions and regulations or permits issued thereunder (or more stringent state or local regulations): section 405 of the Clean Water Act, the Solid Waste Disposal Act (SWDA) (including title II, more commonly referred to as the Resource Conservation and Recovery Act (RCRA), and including state regulations contained in any state sludge management plan prepared pursuant to subtitle D of the SWDA), the Clean Air Act, the Toxic Substances Control Act, and the Marine Protection, Research, and Sanctuaries Act.
Liquid waste.Water-borne solids, liquids, and gaseous substances derived from a grease trap, grit trap, chemical/portable toilet and/or septic tank and described as grease trap waste, grit trap waste or septage.
Milligrams per liter (mg/L).A weight to volume ratio; the milligrams per liter value multiplied by the factor 8.34 is equivalent to pounds per million gallons of water.
Monthly average.The highest allowable average of “daily discharge(s)” over a calendar month, calculated as the sum of all “daily discharge(s)” measured during a calendar month divided by the number of “daily discharge(s)” measured during that month.
National categorical pretreatment standard.A standard specifying the quantities or concentrations of pollutant properties which may be discharged to a POTW by existing or new industrial users in specific industrial subcategories established as separate regulations under the appropriate subpart of 40 CFR chapter
1, subchapter N. These standards, unless specifically noted otherwise, shall be in addition to the general prohibitions established in 40 CFR 403.5.
New source.(1) 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:
(A) The building, structure, facility or installation is constructed at a site at which no other source is located;
(B) The building, structure, facility or installation totally replaces the process or production equipment that causes the discharge of pollutants at an existing source; or
(C) 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 type of activity as the existing source, will be considered.
(2) 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 subsections
(1)(B) and
(C) above but otherwise alters, replaces, or adds to the existing process or production equipment. Construction of a new source as defined has commenced if the owner or operator has:
(A) 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;
(B) 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 definition.
Normal domestic sewage.The “normal” sewage for the town, for which the average concentration of total suspended solids is not more than two hundred fifty (250) mg/L and BOD is no more than two hundred fifty (250) mg/L. Industrial wastes and stormwater are excluded from this term.
Overload.The imposition of organic or hydraulic loading on a treatment facility in excess of its engineered or design capacity.
Owner.Any person who owns a facility or any portion of a facility.
Pass-through.A discharge which exits the POTW into waters of the United States in quantities or concentration which, alone or in conjunction with a discharge or discharges from other sources, is a cause of a violation of any requirement of the POTW’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.
pH.The logarithm (base 10) of the reciprocal of the hydrogen ion concentration.
Pollutant.Any dredged spoil, solid waste, incinerator residue, sewage, garbage, sewage sludge, munitions, chemical wastes, biological materials, radioactive materials, heat, wrecked or discarded equipment, rock, sand, cellar dirt and industrial, municipal and agricultural waste discharged into water.
Polluted water.Any water, liquid or gaseous wastes containing any of the following:
(1) Soluble or insoluble substances of organic or inorganic nature;
(2) Settleable solids that may form sludge deposits;
(4) Floating solids that may cause unsightly appearance or color;
(5) Substances that would impart any taste or odor to the receiving stream; or
(6) Toxic or poisonous substances.
POTW (publicly owned treatment works).A treatment works as defined by section 212 of the Act (33 U.S.C. 1292). This definition includes any devices and systems used in the storage, treatment, recycling and reclamation of municipal sewage or industrial wastes of a liquid nature. It also includes lift stations, sewers, pipes and other conveyances only if they convey wastewater to a treatment plant.
ppm (parts per million).A weight-to-weight ratio; the parts per million value multiplied by the factor 8.345 shall be equivalent to pounds per million gallons of water.
Pretreatment or treatment.The reduction of the amount of pollutants, the elimination of pollutants, or the alteration of the nature of pollutant properties in wastewater to a less harmful state prior to or in lieu of discharging or otherwise introducing such pollutants into a POTW. The reduction or alteration can be obtained by physical, chemical or biological processes, or process changes, or by other means, except as prohibited by 40 Code of Federal Regulations 403.6(d).
Pretreatment requirements.Any substantive or procedural requirement related to pretreatment, other than a national pretreatment standard imposed on an industrial user.
Properly shredded garbage.The wastes from the preparation, cooking and dispensing of foods that have been shredded to such a degree that all particles shall be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one-half (0.5) inch in any dimension.
Responsible corporate officer.Shall mean:
(1) A president, secretary, treasurer, or 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 employing more than two hundred fifty (250) persons or having gross annual sales or expenditures exceeding twenty-five million dollars ($25,000,000.00) (in second quarter 1980 dollars), if authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures.
Sanitary sewer.A public sewer that conveys domestic wastewater or industrial wastes or a combination of both, and into which storm, surface, and ground waters and other unpolluted waters are not intentionally passed.
Septage.Wastes removed from a portable toilet, chemical toilet or septic tank.
Severe property damage.Substantial physical damage to property, damage to the treatment facilities which causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production.
Sewage service charge.The charge made on all users of the public sewer system whose wastes do not exceed in strength the concentration values established as representative of normal sewage.
Sewage works/system.All facilities for collection, pumping, treating and disposing of sewage and industrial wastes and would include sewage, as well as the sewage treatment facilities.
Sewer.A pipe or conduit for carrying sanitary sewage.
SIC (Standard Industrial Classification).A classification pursuant to the Standard Industrial Classification Manual issued by the Executive Office of the President, Office of Management and Budget, 1972, or the latest edition.
Significant industrial user (SIU).(1) Except as provided in subsection
(2), the term shall mean:
(A) All industrial users subject to categorical standards under 40 CFR 403.6 and 40 CFR chapter
1, subchapter N; and
(B) Any other industrial user that: discharges twenty-five thousand (25,000) gallons per day or more of process wastewater to the POTW (excluding sanitary, noncontact cooling and boiler blown-down wastewater); contributes a process wastestream which makes up five (5) percent or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant; or is designated as such by the control authority as defined in 40 CFR 403.12(x) on the basis that the industrial user has a reasonable potential for adversely affecting the POTW’s operation or for violating any pretreatment standard or requirement (in accordance with 40 CFR 403.8(f)(6)).
(2) Upon finding that an industrial user meeting the criteria in subsection
(1)(B) above has no reasonable potential for adversely affecting the POTW’s operation or for violating any pretreatment standard or requirement, the control authority (as defined in 40 CFR 403.12(a)) may at any time, on its own initiative or in response to a petition received from an industrial user or POTW, and in accordance with 40 CFR 403.8(f)(6), determine that such industrial user is not a significant industrial user.
Slug discharge.Any discharge of a non-routine, episodic nature, including but not limited to an accidental spill or a non-customary batch discharge, and/or a discharge which violates any specific prohibitions listed in 40 CFR 403.5(b), and/or could significantly disrupt a POTW’s system, and/or threaten human health and safety, and/or could potentially result in violations of the POTW’s NPDES permit or sludge requirements.
Spill.The accidental or intentional loss or unauthorized discharge of any waste or raw material.
Storm sewer or storm drain.A sewer which carries storm and surface waters and drainage but excludes sewage and polluted industrial wastes.
Surcharge.The charge in addition to the sewage service charge which is made on those persons whose wastes are greater in strength than the concentration values established as representative of normal domestic sewage.
Suspended solids.Solids that either float on the surface of, or are in suspension in, water, sewage, or other liquids, and which are removable by a laboratory filtration device. Quantitative determination of suspended solids shall be made in accordance with procedures set forth in 40 CFR 36.
TCEQ.The Texas Commission on Environmental Quality.
Time composite sample.A sample composed of discrete sample aliquots collected in a single reservoir at constant time intervals irrespective of flow.
To discharge.To deposit, conduct, drain, emit, throw, run, allow to seep, or otherwise release or dispose of, or to allow, permit or suffer any of these acts or omissions.
Toxic pollutant or toxic substance.Any substance whether gaseous, liquid or solid which, when discharged to the sewer system in sufficient concentrations, as determined by the environmental officer, may be hazardous to sewer maintenance and personnel, tend to interfere with any wastewater treatment process, or to constitute a hazard to human beings or animals, or to inhibit aquatic life, or to create a hazard to recreation in the receiving waters of the effluent from a wastewater treatment plant; or any pollutant or combination of pollutants listed as toxic in regulations promulgated by the EPA under the provisions of the Clean Water Act section 307(a) or other acts.
Trap.A device designed to skim, settle, or otherwise remove oil, grease, sand, flammable wastes or other harmful substances.
Upset.An exceptional incident in which there is unintentional and temporary noncompliance with categorical pretreatment standards because of factors beyond the control of the industrial user. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation.
User.Any person who contributes, causes or permits the contribution of wastewater into the town’s sewer system.
Waste.Rejected, unutilized, or superfluous substances in liquid, gaseous or solid form resulting from domestic, agricultural or industrial activities.
Wastewater.The liquid and water-carried industrial or domestic wastes from dwellings, commercial buildings, industrial facilities, and institutions, together with stormwater which may be present, whether treated or untreated, which is contributed into or permitted to enter the POTW.
Watercourse.A channel in which a flow of water occurs, either continuously or intermittently.
(Ordinance 344 adopted 8/13/01; 2006 Code, sec. 13.1021; Ordinance adopting 2021 Code)