The basic user charges for all users connected to and discharging sewage, industrial wastes, water or other liquids into the City Treatment Works shall consist of the following:
(a) Administrative Fee.
(1) Definition. A flat rate charged per bill for administrative costs levied to all active users without regard to volume of discharge or usage.
(2) Determination. Divide the annual administrative costs (C
A
) by the total annual bills (T) to determine the charge per bill.
(b) Treatment Charge for Unaccountable Flow (I/I).
(1) Definition. A flat rate charge per connection for treatment of fifty percent (50%) of the unaccountable flow levied to all active users without regard to volume of discharge or usage.
(2) Determination. Multiply the annual expenditure for normal level pollutant treatment (C
N
) times half of the percent of unaccounted flow (1/2P
U
). Divide the result by the total users (U). The resulting annual charge is then divided by the number of billing periods per year to determine the charge per bill.
(c) Volumetric Usage Charge.
(2) Determination. Multiply the annual expenditure for normal level pollutant treatment (C
N
) by the percent accountable volume (P
A
) plus one-half the percent unaccountable flow (1/2 P
U
). Divide the result by annual accountable volume (V
A
) to determine the cost per unit of discharge.
(d) Inflation Surcharge.
(1) Definition. Rate charged per dollar billed to account for inflation of all costs associated with the Wastewater Treatment System.
(2) Determination. The sum of all billing charges shall be multiplied by a percentage equal to the annual inflation rate for the previous year as measured by the Consumer Price Index. The resulting product shall be added to the other charges.
(Ord. 31-81. Passed 12-1-81.)