Unless the context specifically indicates otherwise, the meanings of terms used in this chapter shall be as follows:
BOD (Denoting BIOCHEMICAL OXYGEN DEMAND): The quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedure in five (5) days at twenty degrees Celsius (20°C), expressed in milligrams per liter (mg/l).
DOMESTIC WASTEWATER: Wastewater that has a BOD concentration of not more than two hundred milligrams per liter (200 mg/l) and a suspended solids concentration of not more than two hundred forty milligrams per liter (240 mg/l).
MAJOR CONTRIBUTING INDUSTRY: An industrial user of the publicly owned treatment works that:
A. Has a flow of twenty five thousand (25,000) gallons or more per average workday; or
B. Has a flow greater than five percent (5%) of the flow carried by the municipal system receiving the waste; or more of the average dry weather hydraulic or organic capacity of the treatment plant; or
C. Has in its waste a toxic pollutant in toxic amounts as defined in standards issued under section 307(a) of the federal act; or
D. Is found by the permit issuance authority, in connection with the issuance of the 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 works; or
E. Contributors who contribute wastewater, the strength of which is greater than normal domestic wastewater.
OPERATION AND MAINTENANCE: All expenditures during the useful life of the treatment works for materials, labor, utilities, and other items which are necessary for managing and maintaining the sewage works to achieve the capacity and performance for which such works were designed and constructed.
POPULATION 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 (200 mg/l) of BOD, 0.20 pounds (240 mg/l) of suspended solids, and 0.03 pounds (40 mg/l) of ammonia- nitrogen (NH3N) and 1.25 pounds (1500 mg/l) of sulfate.
REPLACEMENT: 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 such works were designed and constructed. The term "operation and maintenance" includes replacement.
RESIDENTIAL CONTRIBUTOR: Any contributor to the city's treatment works whose lot, parcel of real estate, or building is used for domestic dwelling purposes only.
SS (Denoting 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 laboratory filtering.
SHALL, MAY: "Shall" is mandatory; "may" is permissive.
TREATMENT WORKS: Any devices and systems for the storage, treatment, recycling, and reclamation of municipal sewage, domestic sewage, or liquid industrial wastes. These include intercepting sewers, outfall sewers, sewage collection systems, individual systems, pumping, power, and other equipment and their appurtenances; extensions improvement, remodeling, additions and alterations thereof; elements essential to provide a reliable recycled supply each as standby treatment units and clear well facilities; and any works, including site acquisition of the land that will be an integral part of the treatment process or is used for ultimate disposal of residues resulting from such treatment (including land for composting sludge, temporary storage of such compost, and land used for the storage of treated wastewater in land treatment systems before land application); and any other method or system for preventing, abating, reducing, storing, treating, separating, or disposing of municipal waste or industrial waste, including waste in combined storm water and sanitary sewer systems.
USEFUL LIFE: The estimated period during which a treatment works will be operated.
USER CHARGE: That portion of the total wastewater service charge which is levied in a proportional and adequate manner for the cost of operation, maintenance, and replacement of the wastewater treatment works.
WATER METER: A water volume measuring and recording device, furnished and/or installed by the city by and through the board of trustees of the Knoxville water department, or furnished and/or installed by a user and approved by the city. (Ord. 86-2, 9-15-1986, eff. 12-1-1986; amd. Ord. 05-09, 9-6-2005)