As used in this chapter:
(a) "BOD" (biochemical oxygen demand) means the quantity of oxygen utilized in the biochemical oxidation of organic matter, under standard laboratory procedure, in five days at 20° Centigrade, expressed in parts per million by weight.
(b) "Normal domestic sewage" means sewage which, when analyzed, shows by weight a daily average of not more than 250 parts per million of suspended solids and not more than 350 parts per million of BOD.
(c) "Operation and maintenance costs" means the costs incurred in the act of keeping all facilities for collecting, pumping, treating and disposing of sewage in a good state of repair and functioning properly, including the replacement of such facilities when necessary.
(d) "Replacement" means 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.
(e) "Sewer service charge" means the total charge levied against users of the sewerage system for sewer service. Such charge shall include user charges.
(f) "Suspended solids" means solids that either float on the surface of or are suspended in water, sewage or other liquids and which are removable by laboratory filtering.
(g) "User charge" means the charge assessed users of the sewerage system to recover the cost of operation, maintenance and replacement of the sewage collection and sewerage treatment system, and the cost of rendering bills and collecting sewer service pipes.
(Ord. 1094. Passed 2-2-87.)