The wastewater service charge for the use of and for service supplied by the wastewater facilities of the village shall consist of a basic user charge for operation and maintenance plus replacement, a debt service charge and a surcharge, if applicable.
(A) The debt service charge is computed by dividing the annual debt service of all outstanding bonds by the number of users.
(B) The basic user charge shall be based on water usage as recorded by water meters and/or sewage meters for wastes having the following normal concentrations:
(1) A five day 20°C biochemical oxygen demand BOD of 200 mg/l; and
(2) A suspended solids (SS) content of 260 mg/l.
(C) It shall consist of operation and maintenance costs plus replacement and shall be computed as follows:
(1) Estimate the projected annual revenue required to operate and maintain the wastewater facilities including a replacement fund for the year, for all works categories;
(2) Proportion the estimated costs to wastewater facility categories by volume, suspended solids and BOD, if possible;
(3) Estimate wastewater volume, pounds of SS and pounds of BOD to be treated;
(4) Proportion the estimated costs to nonindustrial and industrial users by volume, suspended solids and BOD;
(5) Compute costs per 1,000 gallon for normal sewage strength; and
(6) Compute surcharge costs per 1,000 gallon per mg/l in excess of normal sewage strength for BOD and SS.
(D) A surcharge will be levied to all users whose waters exceed the normal concentrations of BOD 200 mg/l and SS 260 mg/l. The surcharge will be based on water usage as recorded by water meters and/or sewage meters for all wastes which exceed the 200 mg/l and 260 mg/l concentration for BOD and SS respectively. (Section 51.54 specifies the procedure to compute a surcharge.)
(E) The adequacy of the wastewater service charge shall be reviewed annually by certified public accountants for the village in their annual audit report. The wastewater service charge shall be revised periodically to reflect a change in debt service or a change in operation and maintenance costs including replacement costs.
(1999 Code, § 38-4-31)