(a) Components. Quarterly sewer charges shall consist of the following components:
(1) Sewer use rates;
(2) Service charge; and
(3) Extra-strength surcharge.
(b) Basis of Charges. Sewer Use Rate, Service Charge and Extra Strength Surcharge shall be as established in Section 929.03.
The sewer use rate for wastewaters which do not exceed normal strength wastes shall be based upon the following annual values.
Cto = Estimated total moneys needed for the administration, billing, operation, maintenance, and replacement expenses of the wastewater treatment works.
Cf = Estimated administration and other fixed, nonflow, BOD and suspended solids related expenses included in Cto for the operation and maintenance of the wastewater treatment works.
Cs = Estimated revenue from extra-strength surcharges.
Qt = The total annual volume of billable sewage flow from all users of the Bryan Sewage System, in 100 cubic foot units.
Su = Total equivalent residential customers on system.
Sewer Use Rate = Cto - Cf per 100 c.f. Qt |
The sewage service charge shall be based on the size of water meter used and shall approximate the portion of fixed operation and maintenance costs attributable to each equivalent residential customer as follows:
Size Meter (Inches) | Service Units |
5/8 - 1 | 1.0 |
1-1/2 | 3.0 |
2 | 5.0 |
3 | 11.0 |
4 | 16.8 |
6 | 32.6 |
8 | 52.4 |
Monthly Sewage Service Charge = Cf (per service unit) Su x 12 |
(c) Extra-Strength Surcharges. In addition to the base user charges applicable pursuant to this subsection, users discharging pollutants to the wastewater treatment works, whose average concentration, as defined in Section 927.02(a), in one or more classifications exceeds in any quarter that concentration defined as normal in Section 927.02(a) in the corresponding classification shall be subject to surcharges calculated as follows:
(1) Surcharges for each billing period during a calendar year shall be based upon the following values for that calendar year: the estimated total operation and maintenance expenses (Cto); the estimated total pounds of BOD received at the plant (Bt); and the estmated total pounds of suspended solids received at the plant (St). Data not available shall be estimated in the most practical manner possible.
(2) Surcharge on user charges per pound of BOD in excess of normal equals:
Cto x 0.13 Bt |
(3) Surcharge on user charges per pound of suspended solids in excess of normal equals:
Cto x 0.126 St |
(4) Pounds of BOD per billing period subject to surcharge equals: (average concentration of BOD, calculated pursuant to Section 927.02(a) in milligrams per liter minus 260 milligrams per liter) times the volume of wastewater discharged from the user to the wastewater treatment works per billing period, in 100 cubic feet times .00624. If the average concentration of BOD is 260 milligrams per liter or less, no surcharge for BOD shall apply.
(5) Pounds of suspended solids per billing period subject to surcharge equals: (average concentration of suspended solids, calculated pursuant to Section 927.02(a), in milligrams per liter minus 260 milligrams per liter) times the volume of wastewater discharged from the user to the wastewater treatment works per billing period, in 100 cubic feet times .00624. If the average concentration of suspended solids is 260 milligrams per liter or less, no surcharge for suspended solids shall apply.
(6) Surcharge on user charges equals the pounds of BOD calculated pursuant to subsection (c)(4) hereof times surcharge per pound calculated pursuant to subsection (c)(2) hereof; plus pounds of suspended solids calculated pursuant to subsection (c)(5) hereof; times surcharge per pound calculated pursuant to subsection (c)(3) hereof.
(7) Formulas as contained in subsection (c)(2) and (3) hereof shall be subject to adjustment as necessary based upon annual audit of sewer revenue fund expenses.
(8) The methodology described above shall be the general basis used by the City in determining extra-strength surcharges. The actual surcharge rates shall be as established in Section 929.03.
(d) Surcharge for Other Pollutants. Surcharges may also be established for pollutants other than those provided for which are permitted to be discharged to the wastewater treatment works by the City after pretreatment or without pretreatment.
(e) Annual Rate Review. The sanitary sewer charge rates shall assure that each recipient of waste treatment services will pay its proportionate share of the cost of operation and maintenance including replacement. Revenue generated shall be proportionate to the portion of operation and maintenance necessary. These rates shall be reviewed annually and shall be revised periodically, as required, to reflect actual treatment works operation and maintenance costs.
(f) Audit, Review and Adjustment. Revenues, expenses, computations, loadings and other data associated with sanitary sewer charges shall be audited annually. All estimated revenues, expenses, consumptions, loadings, allocation factors, etc. shall be reviewed and adjusted annually so as to more accurately reflect current conditions and adjust for past inequities. One of the main purposes of the audit shall be to maintain a proportionate distribution of the wastewater treatment works' operation and maintenance costs, including billing, to all users by means of the user charge system, and to insure that user charges are sufficient to cover all operation and maintenance costs, including billing. Within the limitations of all applicable Federal, State and local laws, the Federal Environmental Protection Agency shall have the right to audit industrial waste discharge records.
(g) Effective Date of Charges. The sanitary sewer charges established shall commence when the building, structure or other facility is connected to a sewer having its ultimate outlet at the wastewater treatment plant, or as of a date 120 days following the date on which the City notifies the owner of such premises that the sewer is available for making such connection, whichever date first occurs and such charges shall be payable pursuant to this section.
(h) Notification. The City shall notify each user, at least annually of the rate and that portion of the user charges which are attributed to wastewater treatment.
(Ord. 66-1987. Passed 12-7-87.)