A. Basis For Wastewater Service Charges:
1. 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, a debt service charge and a surcharge, if applicable.
2. The debt service charge shall be computed by dividing the annual debt service of all outstanding bonds by the number of users. Through further divisions, the bimonthly debt service charges can be computed.
3. 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:
a. A five (5) day, twenty degree centigrade (20°C) biochemical oxygen demand (BOD) of three hundred (300) mg/l.
b. A suspended solids (SS) content of three hundred fifty (350) mg/l.
4. It shall consist of operation and maintenance costs plus replacement and shall be computed as follows:
a. Estimate the projected annual revenue required to operate and maintain the wastewater facilities including a replacement fund for the year, for all works categories.
b. Proportion the estimated costs to wastewater facility categories by volume, suspended solids and BOD, if possible.
c. Estimate wastewater volume, pounds of SS and pounds of BOD to be treated.
d. Proportion the estimated costs to nonindustrial and industrial users by volume, suspended solids and BOD.
e. Compute costs per one thousand (1,000) gallons for normal sewage strength.
f. Compute surcharge costs per one thousand (1,000) gallons per mg/l in excess of normal sewage strength for BOD and SS.
5. A surcharge will be levied to all users whose waters exceed the normal concentrations for BOD (300 mg/l) and SS (350 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 three hundred (300) mg/l and three hundred fifty (350) mg/l concentration for BOD and SS respectively. Subsection F below specifies the procedure to compute a surcharge.
6. The adequacy of the wastewater service charge shall be reviewed 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 debt service or a change in operation and maintenance costs including replacement costs.
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
1,000(Y).
1. If the person discharging wastes into the public sewers procures any part, or all, of the 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/her expense, water meters of a type approved by the Public Works Director 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 Public Works Director 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 cancelled without the consent of the Public Works Director.
C. Debt Service Charge: A debt service charge of three dollars twenty five cents ($3.25) bimonthly to each user of the wastewater facility of the City is hereby established. (Ord. 78-12, 3-6-1978)
D. Basic User Rate:
1. There shall be and there is hereby established a minimum charge and a basic user rate for the use of and for service supplied by the wastewater facilities of the City. A minimum charge bimonthly shall be applied to all users whose water consumption does not exceed
2,000(X) gallons bimonthly. A basic user rate per 1,000(Y) gallons shall be applied to all users for water consumption in excess of 2,000(X) gallons bimonthly. Rates are pursuant to the "schedule of charges" set by the Waterworks and Sewer Committee.
2. All nonmetered residential users of the wastewater facilities shall pay a minimum flat rate charge bimonthly adequate to cover the costs of the minimum debt service charge. The flat rate charge will allow a maximum of two thousand (2,000) gallons bimonthly.
3. In the event use of the wastewater facilities is determined by the Public Works Director to be in excess of
2,000(Z) gallons bimonthly, the Public Works Director may require such flat rate user to install metering devices on the water supply or sewer main to measure the amount of service supplied. (Ord. 78-12, 3-6-1978; 1997 Code)
E. Surcharge Rate: The rates of surcharges for BOD5 and SS shall be as follows: determine the average percent over the maximum for BOD5 and SS and multiply that percent times the basic user rate.
F. Computation Of Surcharge: The concentration of wastes used for computing surcharges shall be established by waste sampling. Waste sampling shall be performed as often as may be deemed necessary by the Public Works Director and shall be binding as a basis for surcharges.
G. Computation Of Wastewater Service Charge: The wastewater service charge shall be computed by the following formula:
CW = CD + CM + (Vu-X) CU + CS
Where
CW = Amount of wastewater service charge ($) per billing period.
CD = Debt Service Charge (subsection C).
CM = Minimum Charge for Operation, Maintenance and Replacement (subsection D).
Vu = Wastewater Volume for the billing period.
X = Allowable consumption in gallons for the minimum charge (subsection D).
CU = Basic User Rate for Operation, Maintenance and Replacement (subsection D).
CS = Amount of Surcharge (subsections E and F).
H. Effective Date Of Rates: The rates and service charges established for user charges in this Section shall be effective as of the next fiscal year beginning May 1, 1978 and on bills to be rendered for the next succeeding period ending May 31, 1978 for bimonthly users. (Ord. 78-12, 3-6-1978)