The definitions of certain words and phrases used in this chapter shall be as follows:
Act shall mean the Clean Water Act of 1977 (PL 95-217), and any amendments thereto, as well as any guidelines, limitations, and standards promulgated by EPA, pursuant to the Act.
Ammonia shall mean the chemical combination of hydrogen and nitrogen occurring in nature expressed as NH3, NH2, or any of its derivatives as contained in the wastewater flow.
BOD (biochemical oxygen demand) shall mean the quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five days at 20 degrees Celsius, expressed in milligrams per liter by weight. BOD shall be determined by standard methods as hereinafter defined.
Biodegradable Oils and Grease shall mean fats, oils, and greases of animal or vegetable origin contained in the wastewater flow.
Building Sewer shall mean 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 a building and conveys it to the lateral sewer. The building sewer shall extend two feet outside the building wall.
Chloride shall mean the anion CL– (Negative Charge at top of CL)
City shall mean the City of Grand Island, Nebraska.
Compatible Wastes shall mean wastes containing pollutants for which the water pollution control plant was basically designed to treat and which are identified in the NPDES permit that is applicable to this treatment plant.
Composite shall mean the makeup of a number of individual samples, so taken as to represent the nature of wastewater or industrial wastes.
Constituents shall mean the combination of particles, chemicals, or conditions which exist in industrial wastes.
Conductivity shall mean the measure of the ability of an aqueous solution to carry an electric charge
Cooling Water shall mean the cleaned wastewaters discharged from any system of heat transfer such as condensation, air conditioning, cooling, or refrigeration.
Department shall mean the City's Department of Public Works.
Director shall mean the Director of the Department of Public Works or his or her authorized representative.
EPA shall mean the United States Environmental Protection Agency.
ICR shall mean industrial cost recovery.
Industrial Plant shall mean any facility which discharges industrial wastes as defined in this ordinance.
Industrial User shall mean:
A. any nongovernmental, nonresidential user of the City's treatment works which discharges more than the equivalent of 25,000 gallons per day of sanitary waste, or a volume of process waste, or combined process and sanitary waste, equivalent to 25,000 gallons per day of sanitary waste and which is identified in the Standard Industrial Classification Manual under Divisions A, B, D, E, and I; or
B. any nongovernmental user of the City's treatment works which discharges wastewater to the treatment works which contains toxic pollutants or poisonous solids, liquids, or gases in sufficient quantity either singly or by interaction with other wastes, to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in or have an adverse effect on the waters receiving any discharge from the treatment works.
Industrial Wastes shall mean the liquid wastes resulting from the processes employed in industrial, manufacturing, trade or business establishments, as distinct from domestic wastes.
Lateral Sewer shall mean the sanitary sewer that extends from the building sewer to the public sanitary sewer system.
Major Contributing Industry shall mean an industrial user that:
A. has a flow of 50,000 gallons or more per average work day; or
B. has a waste strength greater than 5 percent of the plant design capacity; or
C. has in its waste a toxic pollutant in toxic amounts; or
D. is found to have significant impact, either singly or in combination with other contributing industries, on the water pollution control plant, or upon the quality of the plant effluent.
mg/L shall mean milligrams per liter.
Natural Outlet shall mean any natural outlet extending to a water course, pond, or other body of surface or groundwater.
Normal Strength Wastewater shall mean wastewater with pollutant strength values not exceeding the following:
TKN | 30 mg/L |
Biochemical Oxygen Demand | 250 mg/L |
Hydrogen Sulfide | 0 mg/L |
Suspended Solids | 250 mg/L |
Biodegradable Oils and Grease | 100 mg/L |
Chloride | 230 mg/L |
Nitrate | 25 mg/L |
Total Nitrogen | 25 mg/L |
Where the nature of the wastewater does not permit BOD determination, COD shall be substituted according to the relation BOD = (K) (COD), where "K" is a constant to be determined by the Department.
NPDES Permit shall mean the National Pollutant Discharge Elimination System Permit as established by the Act. All municipalities, industries, and commercial enterprises that discharge to surface watercourses are required to have NPDES permits approved by EPA and in Nebraska by the Department of Environmental Quality.
Owner shall have the same meaning as Person defined in this section.
Planning Area shall mean the Grand Island planning area as adopted by the Regional Planning Commission.
Person or Owner shall mean any individual, firm, company, association, developer, corporation, or group.
pH shall mean the logarithm of the reciprocal of the concentration of hydrogen ions in grams per liter of solution.
Pollution shall mean the placing of any noxious or deleterious substance in any waters of the City in quantities which are or may be potentially harmful or injurious to human health or welfare, animal or aquatic life, or property, or unreasonably interfere with the enjoyment of life or property, including outdoor recreation.
Pretreatment shall mean the application of physical, chemical and biological processes to reduce the amount of pollutants in or alter the nature of the pollutant properties in a wastewater prior to discharge into a sanitary sewer.
Public Sewer shall mean the sanitary and/or storm sewers owned by the people of Grand Island and controlled and maintained by the Department of Public Works.
Residential Strength Wastewater shall mean wastewater with pollutant strength values which average 250 mg/L of BOD and 250 mg/L of SS.
Sanitary Sewer shall mean a sewer which carries sanitary wastewater and industrial wastes and to which storm, surface, and groundwaters are not intentionally admitted.
Sanitary Sewerage System shall mean all facilities for collecting, pumping, and transporting wastewater to the water pollution control plant.
Sanitary Wastes or Wastewater shall mean the water carried wastes discharged from building sewers by reason of human occupancy.
Shall is mandatory;
May is permissive.
Standard Methods shall mean those procedures or methods established by the latest edition of the "Standard Methods for the Examination of Water and Wastewater," as prepared, approved, and published jointly by the American Public Health Association and the American Water Works Association.
Storm Sewer or Storm Drain shall mean a sewer which carries storm waters, surface runoff, street wash waters and drainage, but which excludes sanitary wastewater and industrial wastes, other than unpolluted cooling water.
Suspended Solids (SS) shall mean solids that either float on the surface of, or are in suspension in, water, wastewater, or other liquids, and which are removable by laboratory filtering, expressed in milligrams per liter (mg/L).
Total Kjeldahl Nitrogen (TKN) shall mean the sum of organic nitrogen, ammonia (NH3), and ammonium (NH
4+)
Total Sulfides shall mean the chemical combination of dissolved hydrogen sulfide gas (H2S); dissolved ionic sulfide in the form of HS- and S-2 and acid-soluble metallic sulfide present in suspended matter
Toxic shall mean constituents of wastes which adversely affect the organisms involved in wastewater treatment.
Unpolluted Water or Drainage shall mean water to which no pollutants have been added, either intentionally or accidentally.
Wastewater Treatment Facility shall mean the wastewater treatment facility owned and operated by the City for the benefit of all persons located within the City's planning area.
Watercourse shall mean a channel in which a flow of water occurs, either continuously or intermittently.
Wastewater shall mean the liquid and water carried domestic or industrial wastes from dwellings, commercial buildings, industrial facilities, and institutions, together with any groundwater, surface water, and storm water that may be present, whether treated or untreated, which is discharged into or permitted to enter the City's treatment works.
Wastewater Treatment Works shall mean the sanitary sewers, pumping, and other equipment and their appurtenances, and other facilities which are an integral part of the wastewater collection and treatment processes and treatment residue disposal system.