Unless the context specifically indicates otherwise, the meaning of terms used in this chapter shall be as follows:
   BIOCHEMICAL OXYGEN DEMAND (BOD): The quantity of oxygen, expressed in milligrams per liter (mg/l), utilized in the biochemical oxidation of organic matter under standard laboratory procedures in five (5) days at twenty degrees centigrade (20°C).
   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 it to the building sewer, beginning three feet (3') outside the inner face of the building wall.
      Sanitary: A building drain which conveys sanitary or industrial sewage only, and to which storm, surface and ground water are not intentionally admitted.
      Storm: A building drain which conveys storm, surface, or ground water drainage, but no sanitary or industrial sewage, other than unpolluted cooling water.
   BUILDING SEWER: The extension from the building drain to the public sewer or other place of disposal.
      Sanitary: A building sewer which conveys sanitary or industrial sewage only.
      Storm: A building sewer which conveys storm water or other clear water drainage but no sanitary or industrial sewage.
   CITY: The city of Aledo, Mercer County, Illinois, a municipal corporation, its mayor and corporate authorities.
   CLASSES OF USERS: The division of wastewater treatment customers by waste characteristics, and process or discharge similarities.
      Commercial: Includes transient lodging, retail and wholesale establishments or places engaged in selling merchandise for personal, household or industrial consumption, and/or rendering services to others.
      Governmental: Includes legislative, judicial, administrative and regulatory activities of federal, state and local governments, such as courthouses, police and fire stations, city halls and similar governmental users.
      Industrial: Includes manufacturing activities involving the mechanical or chemical transformation of materials or substances into other products. These activities occur in establishments usually described as plants, factories or mills and characteristically use power machines and material handling equipment.
      Institutional: Includes social, charitable, religious and educational activities such as schools, churches, hospitals, nursing homes, penal institutions and similar institutional users.
      Residential: Includes all dwelling units such as detached, semidetached, and row houses, mobile homes, garden and standard apartments, and permanent multi-family dwellings.
   COMBINED SEWAGE: A combination of both sanitary and industrial wastewater and storm or surface water.
   COMBINED SEWER: A sewer intended to receive wastewater, storm surface, and ground water drainage.
   COMPATIBLE POLLUTANT: A pollutant for which the treatment works is designed to treat and includes biochemical oxygen demand, suspended solids, pH and fecal coliform bacteria, or a pollutant for which the plant is able to remove to a substantial degree, being eighty percent (80%) or greater.
   CONTROL MANHOLE: A structure located on a site from which industrial wastes are discharged. Where feasible, the manhole shall have an interior drop. The purpose of a "control manhole" is to provide access for the city representative to sample and/or measure discharges.
   DEBT SERVICE CHARGE: The amount to be paid each billing period for payment of interest, principal and coverage of (loan, bond, etc.) outstanding.
   DEPRECIATION: An annual operating cost reflecting capital consumption and obsolescence of the treatment works.
   DIRECTOR: The director of public works and utilities of the city of Aledo, Illinois, or his authorized deputy, agent, or representative.
   EASEMENT: An acquired legal right for the specific use of land owned by others.
   EFFLUENT CRITERIA: Is defined in the NPDES permit.
   FECAL COLIFORM: Any of a number of organisms common to the intestinal tract of man and animals, whose presence in sanitary sewage is an indicator of pollution.
   FLOATABLE OIL: Oil, fat or grease in a physical state, such that will separate by gravity from wastewater by treatment in a pretreatment facility approved by the authority.
   GARBAGE: Solid wastes from the domestic and commercial preparation, cooking and dispensing of food, and from the commercial handling, storage and sale of produce.
   INCOMPATIBLE POLLUTANT: Any pollutant that is not defined as a compatible pollutant, including nonbiodegradable dissolved solids.
   INDUSTRIAL WASTES: Any solid, liquid or gaseous substance discharged, permitted to flow or escaping from any industrial, manufacturing, commercial or business establishment or process or from the development, recovery or processing of any natural resource as distinct from sanitary sewage.
   INFILTRATION: The water entering a sewer system including building drains and sewers, from the ground, through such means as, but not limited to, defective pipes, pipe joints, connections or manhole walls.
   INFILTRATION/INFLOW: The total quantity of water from both infiltration and inflow without distinguishing the sources.
   INFLOW: The water discharged into a sewer system, including building drains and sewers, from such sources as, but not limited to, roof leaders, cellar, yard and area drains, foundation drains, unpolluted cooling water discharges, drains from springs and swampy areas, manhole covers, cross connections with storm sewers, and combined sewers, catch basins, storm waters, surface runoff, street wash waters or drainage.
   INSPECTOR: The person or persons duly authorized by the authority to inspect and approve the installation of building sewers and their connection to the public sewer system.
   MAJOR CONTRIBUTING INDUSTRY: An industry that either: a) has a flow of fifty thousand (50,000) gallons or more per average workday, or b) has a flow greater than ten percent (10%) of the flow carried by the public sewer system receiving the waste, or c) has in its waste a toxic pollutant in toxic amounts as defined in standards issued under section 308(a) of PL 92-500, or d) is found by the permit issuance authority, in connection with the issuance of NPDES permit to the publicly owned treatment works receiving the waste, to have significant impact, either singly or in combination with other contributing industries, on that treatment works or upon the quality of effluent from that treatment.
   METERED USAGE: The metered water usage of any individual customer, unless separate metering of sewage flow is provided for the customer, wherein it shall mean metered sewage flow of any individual customer.
   MILLIGRAMS PER LITER: A unit of the concentration of water or wastewater constituent. It is 0.001 gram of the constituent in one thousand (1,000) milliliters of water. It has replaced the unit formerly used commonly, parts per million, to which it is approximately equivalent, in reporting the results of water and wastewater analysis.
   NPDES PERMIT: A permit issued under the national pollutant discharge elimination system for discharge of wastewaters to the navigable waters of the United States, pursuant to section 402 of PL 92-500.
   NATURAL OUTLET: Any outlet, including storm sewers and combined sewer overflows, into a watercourse, pond, ditch, lake or other body of surface or ground water.
   NORMAL DOMESTIC SEWAGE: As defined for the purpose of determining surcharge, a wastewater or sewage having an average daily suspended solids concentration of not more than two hundred fifty milligrams per liter (250 mg/l), and average daily BOD of not more than two hundred milligrams per liter (200 mg/l).
   OPERATION AND MAINTENANCE COSTS: All costs, direct and indirect, including depreciation, necessary to ensure adequate wastewater treatment on a continuing basis, conforming with federal, state and local requirements, and assuring optimal long term facility management. Such costs shall not include debt service costs.
   ppm: Parts per million by weight.
   PERSON: An individual, firm, company, association, society, corporation or group discharging any wastewater to the wastewater treatment works.
   pH: The reciprocal of the logarithm of the hydrogen ion concentration. The concentration is the weight of hydrogen ions in grams per liter of solution. The pH of any discharge into the public sewer system shall not be less than five (5) nor more than nine (9).
   POLLUTION EQUIVALENT: A term used to evaluate the impact of industrial or other waste on a treatment works or stream. One population equivalent is one hundred (100) gallons of sewage per day containing 0.17 pounds of BOD and 0.20 pounds of suspended solids.
   PRETREATMENT: The treatment of industrial sewage from privately owned industrial sources prior to introduction into public treatment works.
   PRIVATE SEWER: A sewer which is not owned by a public authority.
   PROPERLY SHREDDED GARBAGE: The wastes from the preparation, cooking, and dispensing of food that has been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in public sewers, with no particle greater than one-half inch (1/2") (1.27 cm) in any dimension.
   PUBLIC AUTHORITY: Any governmental agency having jurisdiction by law over construction and use of a wastewater collection treatment facility.
   PUBLIC SEWER: A sewer in which all owners of abutting properties have equal rights, and which is owned and controlled by the public authority and will consist of the following increments:
      Collector Sewer: A sewer whose primary purpose is to collect wastewater from individual point source discharges.
      Force Main: A pipe in which wastewater is carried under pressure.
      Interceptor Sewer: A sewer whose primary purpose is to transport wastewater from collector sewers to a treatment facility.
      Pumping Station: A station positioned in the public sewer system at which wastewater is pumped to a higher level.
   REPLACEMENT: Expenditures for obtaining and installing equipment, accessories, or appurtenances which are necessary during the usual life of the treatment works to maintain the capacity and performance for which such works were designed and constructed.
   SANITARY SEWER: A sewer which carries sanitary and industrial wastes, and to which storm, surface and ground water are not intentionally admitted.
   SEWAGE: The combination of liquid and water carried wastes from residences, commercial buildings, industrial plants and institutions. The three (3) most common types of sewage are:
      Combined Sewage: Wastes including sanitary sewage, industrial sewage, storm water, infiltration and inflow carried to the wastewater treatment facilities by a combined sewer.
      Industrial Sewage: A combination of liquid and water carried wastes, discharged from an industrial establishment, and resulting from any trade or process carried on in that establishment, including wastes from pretreatment facilities and polluted cooling water.
      Sanitary Sewage: The combination of liquid and water carried wastes discharged from toilet and other sanitary plumbing facilities.
   SEWAGE TREATMENT PLANT: Any arrangement of devices and structures used for treating sewage.
   SEWAGE WORKS: All facilities for collecting, pumping, treating and disposing of sewage.
   SEWER: A pipe or conduit for carrying sewage.
   SEWERAGE FUND: The principal accounting designation for all revenues received in the operation of the sewerage system.
   SHALL OR MAY: The word "shall" is mandatory; the word "may" is permissive.
   SIGNIFICANT INDUSTRY: Any industry that will contribute greater than ten percent (10%) of the design flow and/or design pollutant loading of the treatment works.
   SLUG: Any discharge of water or wastewater which in concentration of any given constituent or in quantity of flow exceeds for any period of duration longer than fifteen (15) minutes more than five (5) times the average twenty four (24) hours' concentration or flows during normal operation.
   STANDARD METHODS: The laboratory procedures set forth in the latest edition, at the time of analysis, of "Standard Methods For The Examination Of Water And Wastewater" prepared and published jointly by the American Public Health Association, the American Water Works Association, and the Water Pollution Control Federation.
   STORM SEWER: A sewer that carries storm, surface and ground water drainage but excludes sewage and industrial wastes other than unpolluted cooling water.
   STORM WATER RUNOFF: That portion of the precipitation that is drained into the sewers.
   SURCHARGE: The assessment in addition to the basic user charge and debt service charge which is levied on those persons whose wastes are greater in strength than the concentration values established in subsection 7-1-15(A) of this chapter.
   SUSPENDED SOLIDS: The solids that either float on the surface of, or are in suspension in water, sewage, or other liquids and which are removable by laboratory filtering.
   TOTAL SOLIDS: The sum of suspended and dissolved solids.
   TOXIC AMOUNT: The concentration of any pollutant or combination of pollutants which upon exposure to or assimilation into any organism will cause adverse effects, such as cancer, genetic mutations, and physiological manifestations as defined in standards issued pursuant to section 307(a) of PL 92-500.
   TREASURER: Treasurer of the city of Aledo, Illinois.
   UNPOLLUTED WATER: Water of quality equal to or better than the effluent criteria in effect, or water that would not cause violation of receiving water quality standards and would not be benefited by discharge to the sanitary sewers and wastewater treatment facilities provided.
   USEFUL LIFE: The estimated period during which the collection system and/or treatment works will be operated.
   USER CHARGE: A charge levied on users of a wastewater treatment works for the cost of operation and maintenance of such works pursuant to section 204(b) of PL 92-500.
   VOLATILE ORGANIC MATTER: The matter in the sewage solids transformed to gases or vapors when heated at five hundred fifty degrees centigrade (550°C) for fifteen (15) to twenty (20) minutes.
   WASTEWATER TREATMENT WORKS OR SEWAGE WORKS: The structures, equipment and processes required to collect, transport, and treat domestic and industrial waste and dispose of the effluent and accumulated residual solids.
   WATERCOURSE: A channel in which a flow of water occurs, either continuously or intermittently.
   WATERWORKS: All facilities for water supply, filtration plant, storage reservoirs, water lines and services and booster stations for obtaining, treating, and disturbing potable water. (Ord. 14/88, 3-20-1989)