S.D. Admin. R. 74:52:03:27

Current through Register Vol. 51, page 67, December 16, 2024

Section 74:52:03:27 - Net effluent limits

If part of a discharger's process wastewater is not being discharged into waters of the state because it is disposed into a well, into a POTW, or by land application thereby reducing the flow or level of pollutants being discharged into waters of the state, applicable effluent standards and limits for the discharge in a permit shall be adjusted to reflect the reduced raw waste resulting from such disposal. Net effluent limits and standards in the permit shall be calculated by one of the following methods:

(1) If none of the waste from a particular process is discharged into waters of the state and effluent limitation guidelines provide separate allocation for wastes from that process, all allocations for the process shall be eliminated from calculation of permit effluent limit or standards; and

(2) In all other cases, effluent limits shall be adjusted by multiplying the effluent derived by applying effluent limitation guidelines to the total waste stream by the amount of wastewater flow to be treated and discharged into waters of the state and dividing the result by the total wastewater flow. Effluent limits and standards so calculated may be further adjusted as allowed in chapter 74:52:07 to make them more or less stringent if discharges to wells, publicly owned treatment works, or by land application change the character or treatability of the pollutants being discharged to receiving waters. This method may be algebraically expressed as

P = E X N

where P is the permit effluent limit, E is the limit derived by applying effluent guidelines to the total waste stream, N is the wastewater flow to be treated and discharged to waters of the state, and T is the total wastewater flow.

S.D. Admin. R. 74:52:03:27

14 SDR 86, effective 12/24/1987; 19 SDR 122, effective 2/21/1993; transferred from

General Authority: SDCL 34A-2-30.

Law Implemented: SDCL 34A-2-13, 34A-2-36, 34A-2-38.