For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
BOARD. The Board of Public Works and Safety of the city or any duly authorized officials acting in its behalf.
BIOCHEMICAL OXYGEN DEMAND (BOD). The quantity of oxygen expressed in mg/l, utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five days at 20°C.
BUILDING DRAIN. The part of the lowest horizontal piping of a drainage system which receives the discharge from soil, waste, and other drainage pipes inside the wall of a building and conveys it to the building sewer beginning three feet outside the inner face of the building wall.
BUILDING DRAIN, SANITARY. A building drain which conveys sanitary or industrial sewage only.
BUILDING DRAIN, STORM. A building drain which conveys stormwater or other clear water drainage but no wastewater.
BUILDING SEWER. The extension from the building drain to the public sewer or other place of disposal. Also called a HOUSE CONNECTION.
BUILDING SEWER, SANITARY. A building sewer which conveys sanitary or industrial sewage only.
BUILDING SEWER, STORM. A building sewer which conveys stormwater or other clear water drainage but no sanitary or industrial sewage.
CITY. The city acting by and through the Board.
COMBINED SEWER. A sewer intended to receive both surface runoff and sewage.
COMMERCIAL USER. Any establishment involved in a commercial enterprise, business, or service which, based on a determination by the city, discharges primarily segregated domestic wastes or wastes from sanitary conveniences.
COMPATIBLE POLLUTANT. Biochemical oxygen demand, suspended solids, pH, and fecal coliform bacteria plus additional pollutants identified in the NPDES permit if the treatment works was designed to treat such pollutants and in fact does remove such pollutants to a substantial degree. The term SUBSTANTIAL DEGREE is not subject to precise definition, but generally contemplates removals in the order of 80% or greater. Minor accidental removals in the order of 10% to 30% are not considered SUBSTANTIAL. Examples of additional pollutants which may be considered COMPATIBLE include:
(1) Chemical oxygen demand;
(2) Total organic compound;
(3) Phosphorus and phosphorus compounds;
(4) Nitrogen and nitrogen compounds; and
(5) Fats, oils, and greases of animal or vegetable origin except as prohibited where these materials would interfere with the operation of the treatment works.
DEBT SERVICE COSTS. The average annual principal and interest payments on all outstanding revenue bonds or other long-term capital debt.
EASEMENT. An acquired legal right for the specific use of land owned by others.
EXCESSIVE STRENGTH SURCHARGE. An additional charge which is billed to users for treating sewage wastes with an average strength in excess of normal domestic sewage.
FECAL COLIFORM. Any 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 that will separate by gravity from wastewater by treatment in a pretreatment facility approved by the city.
GARBAGE. Solid wastes resulting from the preparation, cooking, and dispensing of food and from the handling, storage, and sale of produce.
INCOMPATIBLE POLLUTANT. Any pollutant that is not defined as a compatible pollutant including non-biodegradable dissolved solids.
INDUSTRIAL USER. Any manufacturing or processing facility that discharges industrial waste to a publicly owned treatment works.
INDUSTRIAL WASTES. The wastewater discharges from industrial, trade, or business processes as distinct from employee wastes or wastes from sanitary conveniences.
INFILTRATION. The water entering a sewer system, including building drains and sewers, from the grounds through such means as, but not limited to, defective pipes, pipe joints, connections, or manhole walls. INFILTRATION does not include and is distinguished from inflow.
INFILTRATION/INFLOW. The total quantity of water from both infiltration and inflow without distinguishing the source.
INFLOW. 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 from storm sewers and combined sewers, catch basins, stormwaters, surface runoff, street wastewaters, or drainage. INFLOW does not include and is distinguished from infiltration.
INSPECTOR. The person or persons duly authorized by the city, through its Board, to inspect and approve the installation of building sewers and their connection to the public sewer system.
INSTITUTIONAL USER. Any establishment involved in a social, charitable, religious, and/or educational function which, based on a determination by the city, discharges primarily segregated domestic wastes or wastes from sanitary conveniences.
MAJOR CONTRIBUTING INDUSTRY. An industry that has:
(1) A flow of 50,000 gallons or more per average work day;
(2) A flow greater than 5% of the flow carried by the municipal system receiving the waste;
(3) In its waste, a toxic pollutant in toxic amounts as defined in standards issued under Pub. Law No. 92-500, § 307(a), being § 307(a) of the Clean Water Act, 33 U.S.C. § 1317(a); or
(4) A significant impact, either singly or in combination with other contributing industries, on treatment works or on the quality of effluent from that treatment works.
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (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 Pub. Law No. 92-500, § 402, being § 402 of the Clean Water Act, 33 U.S.C. § 1342.
NATURAL OUTLETS. Any outlet, including storm sewers and combined sewer overflows, into a watercourse, pond, ditch, lake, or other body of surface or groundwater.
NORMAL DOMESTIC SEWAGE. For the purpose of determining surcharges, wastewater or sewage having an average daily concentration as follows: BOD not more than 200 mg/l and SS not more than 240 mg/l. As defined by origin, wastewaters from segregated domestic and/or sanitary conveniences as distinct from wastes from industrial processes.
OPERATION AND MAINTENANCE (O&M) COSTS. Includes all costs, direct and indirect, necessary to provide adequate wastewater collection, transport, and treatment on a continuing basis and produce discharges to receiving waters that conform with all related federal, state, and local requirements. These costs include replacement.
OTHER SERVICE CHARGES. Any and all persons, natural or artificial, including any individual, firm, company, public or private corporation, association, society, institution, enterprise, governmental agency, or other entity.
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.
PRETREATMENT. The treatment of industrial sewage from privately-owned industrial sources prior to introduction into a 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 in any dimension.
PUBLIC SEWER. A sewer which is owned and controlled by the public authority and will consist of the following increments.
(1) COLLECTOR SEWER. A sewer whose primary purpose is to collect wastewaters from individual point source discharges.
(2) FORCE MAIN. A pipe in which wastewater is carried under pressure.
(3) INTERCEPTOR SEWER. A sewer whose primary purpose is to transport wastewater from collector sewers to a treatment facility.
(4) PUMPING STATION. A station positioned in the public sewer system at which wastewater is pumped to a higher level.
REPLACEMENT COSTS. The expenditures for obtaining and installing equipment, accessories, or appurtenances which are necessary during the useful life of the treatment works to maintain the capacity and performance for which the works were designed and constructed.
RESIDENTIAL USER. A user of the treatment works whose premises or building is used primarily as a residence for one or more persons including all dwelling units and the like.
SANITARY SEWER. A sewer which carries sanitary and industrial wastes and to which storm, surface, and groundwater are not intentionally admitted.
SEWAGE. The combination of the liquid and water-carried wastes from residences, commercial buildings, industrial plants, and institutions including polluted cooling water. The three most common types of SEWAGE are:
(1) COMBINED SEWAGE. Wastes including sanitary sewage, industrial sewage, stormwater, infiltration, and inflow carried to the wastewater treatment facilities by a combined sewer;
(2) INDUSTRIAL SEWAGE. A combination of liquid and water-carried wastes which are discharged from any industrial establishment and resulting from any trade or process carried on in that establishment. This shall include the wastes from pretreatment facilities and from polluted cooling water; and
(3) SANITARY SEWAGE. The combination of liquid and water-carried wastes discharged from toilets and other sanitary plumbing facilities.
SEWAGE TREATMENT PLANT. Any arrangement of devices and structures used for treating sewage.
SEWAGE WORKS. The structures, equipment, and processes to collect, transport, and treat domestic and industrial wastes and dispose of the effluent and accumulated residual solids.
SEWER. A pipe or conduit for carrying sewage.
SLUG. Any discharge of water or wastewater which, in concentration of any given constituent or in quantity of flow, exceeds, for any duration longer than ten minutes, more than three times the average 24-hour concentration of flows during normal operation and shall adversely affect the collection system.
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 for conveying water, groundwater, or unpolluted water from any source and to which sanitary and/or industrial wastes are not intentionally admitted.
SUPERINTENDENT. The Superintendent of the Sewage Works of the city or his or her authorized deputy, agent, or representative.
SUSPENDED SOLIDS (SS). 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 under standard laboratory procedure.
TOTAL SOLIDS. The sum of suspended solids and dissolved solids.
TOXIC AMOUNT. Concentrations 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 Pub. Law No. 92-500, § 307(a), being § 307(a) of the Clean Water Act, 33 U.S.C. § 1317(a).
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 benefitted by discharge to the sanitary sewers and wastewater treatment facilities provided.
USER CHARGE. A charge levied on the users of the wastewater treatment works for the cost of operation and maintenance of such works pursuant to Pub. Law No. 92-500, § 204(b), being § 204(b) of the Clean Water Act, 33 U.S.C. § 1284.
VOLATILE ORGANIC MATTER. The material in the sewage solids transformed to gases or vapors when heated at 55°C for 15 to 20 minutes.
WATERCOURSE. A natural or artificial channel for the passage of water either continuously or intermittently.
(Prior Code, § 52.01) (Ord. 1166, passed 1-2-1984; Ord. 1167, passed 1-2-1984)