(A) The basic user charge is levied on all users to recover the operation, maintenance plus replacement (O, M & R) costs and shall be based on water usage as recorded by water meters or sewage meters for wastes having the following normal domestic concentrations:
(1) A five day, 20 C BOD of 250 mg/l.
(2) A suspended solids content of 250 mg/l.
(B) The basic user charge shall be computed as follows:
(1) Estimate the annual wastewater volume, pounds of BOD and pounds of SS to be treated.
(2) Estimate the projected annual revenue required to operate and maintain the wastewater facilities, including a replacement fund for the year, for all works categories.
(3) Proportion the estimated O, M & R costs to each user class by volume, BOD and SS.
(4) Proportion the estimated O, M & R costs to wastewater facility categories by volume, BOD and SS.
(5) Compute costs per 1,000 gallons for normal domestic strength sewage.
(6) Compute surcharge costs per pound for BOD and SS concentrations in excess of normal domestic strengths.
(Ord. 1060-W, passed 8-16-99)