(a) All persons discharging industrial wastes into the Village sewers shall be subjected to a surcharge, in addition to any other sewer service charges, if those wastes have a concentration greater than the concentrations established in Section 925.02(c). The amount of surcharge shall reflect the cost incurred by the Village in removing the excess BOD and SS. This surcharge shall include a proportionate share of the overall fixed charges for the wastewater treatment facilities based upon an average useful life of thirty years, or at the end of major construction periods, whichever is shorter; and the annual cost of operation and maintenance of the treatment facilities.
(b) The excess pounds of BOD and SS shall be computed by multiplying the person's sewage flow volume in million gallons per day by the constant 8.345 and then multiplying this product by the difference between the person's concentrations of BOD and SS and the concentrations established in Section 925.02(c) in milligrams per liter. The surcharge for each constituent shall then be determined by multiplying the excess pounds of each constituent by the appropriate rate of surcharge listed in subsection (c) hereof. This product will then be multiplied by the number of days in the billing period to determine the surcharge. Concentration figures in the above calculations shall be daily averages determined in accordance with the provisions of Section 925.10.
(c) The rates of surcharge for each of the aforementioned constituents shall be as follows:
(1) For biochemical oxygen demand (BOD), eleven cents (11¢) per pound;
(2) For suspended solids (SS), thirteen cents (13¢) per pound.
(d) The rates of surcharge shall be reviewed annually by the approving authority to determine whether or not they are sufficient to defray the fixed charges, amortization costs, and annual cost of operation and maintenance, including replacement, as determined from the wastewater treatment facilities records. If the difference between the revenue derived from the rates of surcharge and the total annual cost is sufficient to justify an increase or decrease in the rates, the approving authority shall make such recommendation as is appropriate to Council.
(Ord. 1979-5. Passed 5-14-79.)