A. Basis For Wastewater Service Charges:
1. Charges Encompassed: The wastewater service charge for the use of and for service supplied by the wastewater facilities of the city shall consist of a basic user charge for operation and maintenance plus replacement, applicable surcharges and local capital cost charge composed of a debt service charge and a capital improvement charge.
2. Basis For 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 domestic concentrations:
(1) A five (5) day, twenty degree centigrade (20°C) biochemical oxygen demand (BOD) of two hundred milligrams per liter (200 mg/l).
(2) A suspended solids (SS) content of two hundred fifty milligrams per liter (250 mg/l).
b. The basic user charge shall consist of operation and maintenance costs plus replacement and shall be computed as follows:
(1) Estimate wastewater volume, pounds of SS and pounds of BOD 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 OM&R costs to each user class by volume, suspended solids and BOD.
(4) Proportion the estimated operation, maintenance and replacement (OM&R) costs to wastewater facility categories by volume, suspended solids and BOD.
(5) Compute costs per one thousand (1,000) gallons for normal sewage strength.
(6) Compute surcharge costs per pound per one thousand (1,000) gallons in excess of normal sewage strength for BOD and SS.
3. Surcharge: A surcharge will be levied to all users whose waters exceed the normal domestic concentrations of BOD (200 mg/l) and SS (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 the two hundred milligrams per liter (200 mg/l) and two hundred fifty milligrams per liter (250 mg/l) concentration for BOD and SS, respectively.
4. Adequacy: The adequacy of the wastewater service charge shall be reviewed, not less often than annually, by certified public accountants for the city in their annual audit report. The wastewater service charge shall be revised periodically to reflect a change in local capital costs or a change in operation and maintenance costs, including replacement costs.
5. Annual Notification: The users of wastewater treatment services will be notified annually, in conjunction with a regular bill, of the rate and that portion of the user charges which are attributable to the wastewater treatment operation, maintenance and replacement.
B. Measurement Of Flow: The volume of flow used for computing basic user charges and surcharges shall be the metered water consumption read to the lowest even increments of one thousand (1,000) gallons.
1. If the person discharging wastes into the public sewers procures any part, or all, of his water from sources other than the public waterworks system, all or a part of which is discharged into the public sewers, the person shall install and maintain, at his expense, water meters of a type approved by the council for the purpose of determining the volume of water obtained from these other sources.
2. Devices for measuring the volume of waste discharged may be required by the council if these volumes cannot otherwise be determined from the metered water consumption records.
3. Metering devices for determining the volume of waste shall be installed, owned, and maintained by the person. Following approval and installation, such meters may not be removed, unless service is canceled, without the consent of the council. (Ord. 1361, 3-6-2006)
C. Basic User Rates Established: The basic user rates for the city are those established in subsection 8-3-4A of this title. (Ord. 1361, 3-6-2006; amd. 2006 Code)