(A) Metered rates. Sewage rates and charges for industrial users served by the Wastewater Department shall be based on the consumption of water as determined and billed by the Water Department or if the industry is not served by the Water Department by the measurement of effluent discharged through a non-resettable flow measurement device as designated in the user’s industrial wastewater permit. Sewer use volume rates shall be set periodically by the City Council as detailed in this chapter.
(B) Excessive strength surcharges. Excessive strength wastewater can cause problems with the treatment processes at the wastewater treatment plant, which may cause the wastewater treatment plant to be in violation of the terms and conditions of its National Pollutant Discharge Elimination System (NPDES) Permit issued by the Indiana Department of Environmental Management (IDEM). Excessive strength wastewater is not desirable and entities discharging excessive strength wastewater will be surcharged as outlined below.
(1) Excessive strength wastewater containing total suspended solids (TSS) in excess of 225 mg/l shall be billed at $0.27 per pound, each month, for the TSS in excess of 225 mg/l.
(2) Excessive strength wastewater with a carbonaceous biochemical oxygen demand (CBOD5) concentration in excess of 200 mg/l shall be billed at $0.31 per pound, each month, for the CBOD5 in excess of 200 mg/l.
(3) Excessive strength wastewater with a chemical oxygen demand (COD) concentration in excess of 500 mg/l shall be billed at $0.12 per pound, each month, for the COD in excess of 500 mg/l.
(4) Excessive strength wastewater with a total ammonia-nitrogen (NH4-N) concentration in excess of 20 mg/l shall be billed at $3.08 per pound, each month, for the NH4-N in excess of 20 mg/l.
(5) Excessive strength wastewater with a phosphorous content in excess of 10 mg/l shall be billed at $6.16 per pound, each month, for the phosphorous in excess of 10 mg/l.
(6) Excessive strength wastewater may be surcharged for CBOD or COD but not for both.
(7) Invoices for excessive strength surcharges will be sent monthly for each month a surcharge may occur. Payment of the surcharge must be within 30 days of receipt of the surcharge invoice or a 10% penalty will be added for each 30 days that the invoice is not paid. The 10% penalty will be added to the invoice, said 10% penalty shall be calculated on the total amount due, not just on the initial excessive strength surcharge.
(Ord. 1320, passed 12-22-98; Am. Ord. 1459, passed 6-5-06; Am. Ord. 1489, passed 5-5-08; Am. Ord. 1584, passed 8-19-13; Am. Ord. 1639, passed 12-19-16)