A. Service Charges; Metered And Nonmetered:
1. All users of the authority/city owned wastewater treatment system shall be charged a monthly fee based upon metered water consumption at a rate or rates as the authority's board of trustees shall establish by resolution from time to time. (Ord. 3143, 12-29-2000; amd. 2005 Code)
2. In the case of users not on a metered basis, the utility superintendent shall establish an estimated water consumption based on a comparison of the nonmetered user with a metered user of similar class. Example: A nonmetered family of four (4) will be compared to a typical family of four (4) with a water meter to establish water consumption. (Ord. 3143, 12-29-2000)
B. User Charge Schedule; Volume Basis: As the BOD, suspended solids, and other pollutant concentration discharged shall be approximately equal for all domestic users, users shall be charged on a volume basis in accordance with the following formula:
Cu = Cb/Ct/Vt (Vu)
(Based on Model #1, 40 CFR 35, Appendix B) | |||
Symbols and definitions: | |||
Cu | = | A user's charge per unit of time | |
Cb | = | A user's base minimum charge (for debt retirement, billing, administration, etc.) per unit of time | |
Ct | = | Total operation and maintenance (O&M) costs per unit of time | |
V/t | = | Total volume contribution from all users per unit of time (may include extraneous flows) | |
C. Excessive Strength Charges: For any user, when the BOD exceeds *225 mg/l, the suspended solids exceeds *225 mg/l, or when the pollutant concentrations exceed the range of concentrations of the pollutants in normal domestic sewage, a surcharge shall be added to the basic charge. This surcharge shall be calculated by the following formula:
*Maximum limit for average domestic waste.
Cs = (Bc (B) + Sc (S) + Pc (P) ) | |||
(Based on Model #2, 40 CFR 35, Appendix B) | |||
Symbols and definitions: | |||
Cs | = | A surcharge for wastewaters of excessive strength | |
Bc | = | O&M costs for treatment of a unit of biochemical oxygen demand (BOD) | |
B | = | Concentration of BOD from a user above a base level | |
Sc | = | O&M cost for treatment of a unit of suspended solids (SS) | |
S | = | Concentration of SS from a user above a base level | |
Pc | = | O&M cost for treatment of a unit of any pollutant | |
P | = | Concentration of any pollutant from a user above a base level | |
Vu | = | Volume contribution from a user per unit of time | |
D. Review And Revision: The user charge ordinance shall be reviewed not less often than every two (2) years regarding the wastewater contribution of users and user classes, the total costs of the operation and maintenance of the treatment works, and its approved user charge system. The charges for users or user classes shall be revised to accomplish the following:
1. Maintain the proportionate distribution of operation and maintenance costs among users and user classes;
2. Generate sufficient revenue to pay the total operation and maintenance costs necessary to the proper operation and maintenance (including replacement) of the treatment works; and
3. Apply excess revenues collected from a class of users to the costs of operation and maintenance attributable to that class for the next year, and the rates shall be adjusted accordingly.
E. Toxic Pollutants Charges: Each user that discharges any toxic pollutants which cause an increase in the cost of managing the effluent or the sludge of the treatment works shall pay for such increased costs.
F. User Notification: Each user shall be notified at least annually, in conjunction with the regular bill, of the sewer use rate and the portion of the user charges which are attributable to wastewater treatment services. Costs shall be broken down to show the operation and maintenance costs attributable to that user.
G. Charges For Extraneous Flows: The costs of operation and maintenance for all flows not directly attributable to users (such as infiltration/inflow) shall be distributed among users on the same basis as operation and maintenance charges.
H. Compliance Records: A record keeping system shall be established and maintained by the city to document compliance with federal regulations pertaining to the user charge ordinance. (1986 Code § 18-19)