A. 
All persons discharging industrial wastes into the public sewers shall be subjected to a surcharge, in addition to any other sewer service charges, if these wastes have a concentration greater than the following "normal" concentrations:
(1) 
A five-day twenty-degree centigrade biochemical oxygen demand (BOD) of 300 milligrams/liter (mg/l).
(2) 
A suspended solids content of 300 mg/l.
(3) 
An ammonia nitrogen concentration of 25 mg/l.
(4) 
A total phosphorus concentration of five mg/l.
B. 
The amount of surcharge shall reflect the cost incurred by the City in removing the excess biochemical oxygen demand (BOD) suspended solids, ammonia nitrogen, Kjeldahl nitrogen and phosphorus. This surcharge may include a proportionate share of the following:
(1) 
Fixed charges and amortization costs for the wastewater treatment works related to the appropriate surcharge parameter, as determined by the Director. Such basis of fixed charges shall be recalculated each year, or at the end of major construction periods, whichever is shorter; and
(2) 
The annual cost of operation of the portions of the wastewater treatment works, including repairs and maintenance, related to the approximate surcharge parameter, as determined by the Director.
The surcharge per person shall be determined as follows: The excess pounds of biochemical oxygen demand (BOD), suspended solids, ammonia nitrogen, Kjeldahl nitrogen and phosphorus will 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 concentration of biochemical oxygen demand (BOD), suspended solids, ammonia nitrogen and phosphorus and the aforementioned "normal" concentration in parts per million by weight. The surcharge for each constituent will then be determined by multiplying the excess pounds of each constituent by the appropriate rate of surcharge listed. 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 as determined by the City in accordance with the provisions of this chapter.
The rates of surcharge shall be approved by City Council. Rate schedules will be available from the City Bureau of Water and Sewage.
The rates of surcharge shall be reviewed annually by the City in order to determine whether or not they are sufficient to defray the fixed charges, amortization costs and annual costs of operation as determined from the wastewater treatment works records. If the difference between the revenue derived from the rates of surcharge and the total annual costs is sufficient to justify an increase or decrease in the rates, the City shall make the appropriate change which shall be confirmed by resolution of the Council.
A. 
Billing periods. Industrial waste surcharges provided for in this chapter shall be included as a separate item on the regular bill for sewer charges and shall be payable in four quarterly payments each year, in accordance with the existing practices of the City of Batavia Water Department.
B. 
Payment. Sewer service charges and industrial waste surcharges shall be payable at the office of the Clerk-Treasurer at the same time that the water bills of the person become due.
C. 
All unpaid surcharges shall be a lien on the real property where the water is used and may be included in the general City tax roll and enforced in the same manner as the City real estate tax.