PERMIT RATIONALE FOR REISSUANCE
Scott County Schools, Scott Central Attendance Center
Scott County
Forest, Mississippi
Water NPDES No. MS0038393
February 2023

I.	CLASSIFICATION –NPDES Commercial

II.	DESCRIPTION OF WASTEWATER –Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via a conventional lagoon followed by chlorine disinfection prior to discharge. Only one discharge is described in the application with no increase in treated effluent flow.

IV.	RECEIVING WATERS –  Unnamed Tributary thence Tallabogue Creek located in the Pearl River drainage basin. Tallabogue Creek does not appear on the updated 303(d) List of Impaired Waterbodies.  However, the discharge does appear on a completed TMDL’s for Nutrients and Low Dissolved Oxygen,. Tallabogue Creek is classified as Fish and Wildlife.  One discharge to surface waters is described within the application with no increase in flow proposed. The discharge from this facility should not further impair water quality.

V.	APPLICABLE GUIDELINES –11 Mississippi Admin Code pt. 6, Commercial Facility Guidelines (Technology), State of Mississippi Water Quality Criteria (MSWQS)
VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

Parameter			Value					Basis
Flow				0.025 MGD				Design
BOD				30 mg/l				WLA
TSS				90 mg/l				Technology
Ammonia Nitrogen		5 mg/l			WLA
Nitrogen, Total		2.40 lbs./day			WLA		
Phosphorous, Total		1.08 lbs./day			WLA
Min. Dissolved Oxygen	6.0 mg/l			WLA
E. Coli				126 Col./100mL			WLA
Effluent pH			6.0 to 9.0 S.U.				WLA
Chlorine			0.068 mg/l			WLA

VII.	CHANGES FROM PREVIOUS PERMIT –

Phase II limitations from previous permit are now effective. Phase I limitations no longer apply and are not added in the proposed draft permit.

Receiving Stream in permit has been changed from “Tallabouge” to “Unnamed Tributary thence Tallabouge” to reflect Waste Load Allocation.