(A) The wastewater service charges for the use of and for service supplied by the wastewater facilities of the village shall consist of a basic user charge to pay expenses of operation, maintenance and replacement of the system; a fixed debt service/capital improvement charge; a variable debt service rate and a surcharge, if applicable.
(1) Basic user charge.
(a) 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 volume and concentrations:
1. Flow of 5,000 gallons per quarterly period.
2. A five-day, 20° C. bio-chemical oxygen demand (BOD5) of 200 mg/l.
3. A suspended solids (SS) content of 250 mg/l.
(b) 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 next fiscal year for all works categories.
2. Proportion the estimated costs to wastewater facility categories by volume, suspended solids and BOD5.
3. Estimate wastewater volume, pounds of SS and pounds of BOD5 to be treated.
4. Compute unit costs for volume (dollars per 1,000 gallons), for suspended solids (Dollars per lb.) and BOD5 (Dollars per lb.).
5. Compute costs per 1,000 gallons for volume, SS and BOD5 at normal sewage strength. Add these costs to determine the charge for operation and maintenance including replacement.
(2) Debt service charge. A debt service charge, consisting of a fixed charge per billing period in such amount as the President and Board of Trustees may determine, applicable to each unit connected to the system, which shall include apartment units and other units in multiple use structures, shall be charged in order to pay part of the annual principal and interest requirements, including a sinking fund and other reserves necessary therefor.
(3) Debt service rate. A debt service rate consisting of a rate per 1,000 gallons of usage shall be determined by dividing the balance of the amount required to pay annual principal and interest requirements, (after deducting revenue received from the fixed debt service charge) by the total number of gallons billed in the preceding fiscal year for sewer service.
(4) Surcharge. A surcharge will be levied upon all users whose wastes exceed the normal concentrations for BOD5 (200 mg/l), and suspended solids (250 mg/l). The surcharge will be based on water usage as recorded by water meters and/or sewage meters for all wastes which exceed these parameters. Section 51.148 specifies the procedure to compute a surcharge.
(B) The wastewater service charge shall be reviewed annually by the Village Board of Trustees. The service charge shall be revised periodically to reflect the change in debt service or a change in operation and maintenance including replacement costs.
(Ord. 89-12-B, passed 12-26-89)