(A) Each user of the sewerage service system shall be charged for the use of the system and for the services supplied thereby, a charge of $0.67 per 1,000 gallons of water consumed as shown by the water meter or meters of the user, plus an additional fixed charge of $0.21 per each user per month.
(B) Basic formula for establishing a rate for a surcharge above normal domestic sewage:
(1) (a) Each sewer user shall pay a rate surcharge based upon the excess suspended solids (SS) and biochemical oxygen demand (BOD) express in milligrams per liter (mg/l) for each 1,000 gallons of sewerage discharge, which surcharge shall be based upon the following formula:
BOD — 260 mg/l
SS — 275 mg/l
(b) These calculations are based on the principal that 25% of the cost of operating is attributable to the removal of BOD and 50% to the removal of SS; and 25% to flow.
Bc = Surcharge on cost per pound of BOD in excess of 260 mg/l.
Sc = Surcharge on cost per pound of SS in excess of 250.0 mg/l.
O&M = Operational and maintenance cost of sewage treatment plant.
Design average daily flow = 650,000 GPD - 0.650 MGD.
Bc = (O&M) 25% =
BOD
Bc = $0.053/lb.
Bc = $0.053/lb.
O&M = $83,947.84
BOD = 200 mg/l = normal domestic sewage
Sc = (O&M) 50%=
SS
Sc = $0.085/lb.
Sc = $0.085/lb.
(2) To determine the strength of the sewerage and wastes, samplings and analysis may be made when deemed desirable by the city. After charges have been established, their of composite samples of the sewerage and wastes certified by a registered engineer or a qualified graduate chemist, may be submitted in support of the request. The city may then adjust the charges to the ordinance rates required by the analysis or may recheck the findings by additional samplings and analysis. Requests for rate adjustments may be submitted no more often than once every 12 months.
(1994 Code, § 52.054) (Ord. 262, passed 3-8-1976; Ord. 266, passed 4-27-1976; Ord. 269, passed 10-12-1976)