A. Any customer discharging abnormal industrial wastes to the public sanitary sewage system having an average total suspended solids (TSS) content in excess of 250 mg/l and/or an average of five (5) day BOD in excess of 200 mg/l, and /or an average COD in excess of 400 mg/l, and/or and average Oils & Grease concentration of 100 mg/l, and/or an average ammonia-nitrogen level in excess of 25 mg/l, and/or flows in excess of permitted levels, then the customer shall pay a surcharge based upon the excess strength of his wastes.
B. Discharges exceeding a maximum daily limit of Fats and Oils and Greases of 100 mg/l, shall be subject to fines.
C. The costs of treatment for each pound of BOD, suspended solids, Oil & Grease and ammonia-nitrogen removed by each treatment works shall be reviewed by the Utility Service Board at the end of each fiscal year. If a discrepancy exists between the actual costs as found by the Board and the estimated costs, the Approving Authority shall increase or decrease the surcharge rates sufficiently to cover only the projected actual costs for the ensuing year.
D. No reduction in sewerage service charges, fees, or taxes will be permitted because of the fact that certain industrial wastes discharged to the public sanitary sewerage system contain less than the surcharge level.