(A) Liability for surcharge. Each industrial or non-industrial user who discharges wastes into the sewerage system shall be subject to a surcharge, in addition to the regular sewer charges, based on the biochemical oxygen demand, phosphorus, ammonia, and suspended solids content of the wastes, if these wastes have a concentration greater than the following:
(1) A biochemical oxygen demand of 200 mg/l;
(2) A phosphorus content of 5 mg/l;
(3) An ammonia content of 12 mg/l; or
(4) A suspended solids content of 250 mg/l.
(1987 Code, § 9-78)
(B) Computation of surcharge. The surcharge shall be determined as follows:
(1) The excess pounds of BOD, phosphorus, ammonia, and suspended solids will each be computed by first multiplying the customer’s billing sewage volume measured in units of 100 cubic feet for the current billing period by the factor 0.0062321 and then multiplying this product by the difference between:
(a) The concentrations measured in milligrams per liter of the BOD, phosphorus, ammonia, and suspended solids respectively in the customer’s sewage; and
(b) The allowed concentrations set out in division (A) above.
(2) The surcharge for each constituent will then be determined by multiplying the excess pounds of each constituent by the appropriate rate of surcharge set out in division (C) below.
(1987 Code, § 9-79)
(C) Rates of surcharge. The rate of surcharge for each of the aforementioned constituents shall be as set forth in Appendix B, Table F, of this chapter.
(1987 Code, § 9-80)
(D) Revision of rates of surcharge. Prior to May 1 of each year, the Clerk-Treasurer shall submit to the Board of Public Works and Safety a comparison of the calculated unit costs for removing BOD, phosphorus, ammonia, and suspended solids from the wastewater treatment plant influent during the previous calendar year with the unit charges currently in effect in order that the Board may determine whether the current rates of surcharge are adequate or should be changed by the City Council.
(1987 Code, § 9-81)
(Ord. passed 6-26-2000; Am. Ord. 13, 2001, passed 5-14-2001)