§ 51.004  DEFINITIONS.
   For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
   ACT or THE ACT.  The Federal Water Pollution Control Act, also known as the Clean Water Act, as amended, 33 U.S.C. §§ 1251 et seq.
   APPROVAL AUTHORITY.  The Regional Administrator of the EPA.
      (1)   If the user is a corporation:
         (a)   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
         (b)   The manager of 1 or more manufacturing, production, or operation facilities employing more than 250 persons or having gross annual sales or expenditures exceeding $25,000,000 (in second-quarter 1980 dollars), if authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures.
      (2)   If the user is a partnership or sole proprietorship:  a general partner or proprietor, respectively.
      (3)   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 his or her designee.
      (4)   The individuals described in divisions (1) through (3), 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.
   BIOCHEMICAL OXYGEN DEMAND or BOD.  The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedures for 5 days at 20°C, usually expressed as a concentration (e.g., mg/l).
   CATEGORICAL PRETREATMENT STANDARD or CATEGORICAL STANDARD.  Any regulation containing pollutant discharge limits promulgated by the EPA in accordance with §§ 307(b) and 307(c) of the Act (33 U.S.C. § 1317) which apply to a specific category of users and which appear in 40 C.F.R. Ch. I, subch. N, pt. 405 - 471.
   CITY.  The City of Ferris or the City Council.
   COMPOSITE SAMPLE.  A sample that is collected over time, formed either by continuous sampling or by mixing discrete samples.  The sample may be composited either as a TIME 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 AUTHORITY.  Trinity River Authority of Texas as holder of the NPDES permit.
   DIRECTOR OF PUBLIC WORKS or DIRECTOR.  The person designated by the city who is charged with certain duties and responsibilities by this chapter, or a duly authorized representative.
   ENVIRONMENTAL PROTECTION AGENCY or EPA.  The U.S. Environmental Protection Agency or, where appropriate, the Regional Water Management Division Director, or other duly authorized official of that 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 the source if the standard is thereafter promulgated in accordance with § 307 of the Act, being 33 U.S.C. § 1317.
   GRAB SAMPLE.  A sample which is taken from a wastestream without regard to the flow in the wastestream and over a period of time not to exceed 15 minutes.
   INDIRECT DISCHARGE or DISCHARGE.  The introduction of pollutants into the POTW from any nondomestic source regulated under §§ 307(b), 307(c), or 307(d) of the Act, being 33 U.S.C. § 1317.
   INDUSTRIAL USER.  An industry that discharges wastewater into the wastewater system.
   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 Control Authority’s NPDES permit or of the prevention of sewage sludge use or disposal in compliance with any of the following statutory or regulatory provisions or permits issued thereunder, or any more stringent state or local regulations:  § 405 of the Act, being 33 U.S.C. § 1345; the Solid Waste Disposal Act, being 42 U.S.C. §§ 6901 et seq., including Title II commonly referred to as the Resource Conservation and Recovery Act (RCRA); 40 C.F.R. pt. 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 Tex. Admin. Code, Title 30, Ch. 312; the Clean Air Act; the Toxic Substances Control Act; and the Marine Protection, Research, and Sanctuaries Act.
   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.
   NATURAL OUTLET.  Any outlet into a watercourse, pond, ditch, lake, or other body of surface or ground water.
      (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 § 307(c) of the Act, being 33 U.S.C. § 1317, which will be applicable to the source if the 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 general type of activity as the existing source, should 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 divisions (1)(b) or (1)(c) above but otherwise alters, replaces, or adds to existing process or production equipment.
      (3)   Construction of a NEW SOURCE as defined herein has commenced if the owner or operator has either:
         (a)   Begun, or caused to begin, as part of a continuous on-site construction program:
            1.   Any placement, assembly, or installation of facilities or equipment; or
            2.   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 division.
   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 suspended solids and 5-day BOD does not exceed 250 mg/l each.
   PASS THROUGH.  A discharge which exits the POTW into waters of the U.S. 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 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, 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 the 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 imposed on a user, other than a pretreatment standard.
   PRETREATMENT STANDARDS or STANDARDS.  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 § 51.015 of this code.
   PUBLICLY OWNED TREATMENT WORKS or POTW.  A treatment works, as defined by § 212 of the Act (33 U.S.C. § 1292), which is owned by the city 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.
   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, and the like).
      (1)   A user subject to categorical pretreatment standards.
      (2)   A user that:
         (a)   Discharges an average of 25,000 gpd or more of process wastewater to the POTW (excluding sanitary, noncontact cooling, and boiler blowdown wastewater);
         (b)   Contributes a process wastestream which makes up 5% or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant;
         (c)   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; or
         (d)   Is defined as subject to national categorical pretreatment standards by the EPA.
      (3)   Upon a finding that a user meeting the criteria in division (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 C.F.R. pt. 403.8(f)(6), determine that the user should not be considered a SIGNIFICANT INDUSTRIAL USER.
   SLUG LOAD or SLUG.  Any discharge at a flow rate or concentration which could cause a violation of the prohibited discharge standards in § 51.015 of this code.
   STANDARD INDUSTRIAL CLASSIFICATION CODE or SIC.  A classification pursuant to the Standard Industrial Classification Manual issued by the U.S. Office of Management and Budget.
   STORM WATER.  Any flow occurring during or following any form of natural precipitation, and resulting from the 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.
   TOTAL TOXIC ORGANICS or TTO.  The sum of the masses or concentration of specific toxic organic compounds found in industrial users’ discharge at a concentration greater than 0.01 mg/l.  For non-categorical and categorical SIUs, the TTO list is 40 C.F.R. pt. 122, App. D, Table 2, unless specifically designated in a particular categorical classification.
   USER or INDUSTRIAL USER.  A source of indirect discharge.
   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 TREATMENT PLANT or TREATMENT PLANT.  The portion of the POTW which is designed to provide treatment of municipal sewage and industrial waste.
(Ord. 317, passed 10-16-1995)