(A) The city, or its city engineer, shall determine the total annual costs of operation and maintenance of the wastewater system which are necessary to maintain the capacity and performance, during the service life of the treatment works, for which such works were designed and constructed. The total annual cost of operation and maintenance shall include but need not be limited to labor, repairs, equipment, replacement, maintenance, necessary modifications, power, sampling, laboratory tests and a reasonable contingency fund.
(B) The purpose of this chapter shall be to generate sufficient revenue to pay all costs for the operation and maintenance of the complete wastewater system. The costs shall be distributed to all users of the wastewater system in proportion to each user's contribution to the total loading of the treatment works. Factors such as strength (BOD and TSS), volume and delivery flow rate characteristics shall be considered to ensure a proportional distribution of operation and maintenance costs to each user (or user class).
(Prior Code, § 13.08.040)