PERMIT RATIONALE FOR REISSUANCE
Forrest County School District, Dixie Attendance Center
Forrest County
Hattiesburg, Mississippi
Water NPDES No. MS0043516
February 4, 2025

I.	CLASSIFICATION – Commercial NPDES 

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated by means of a conventional lagoon followed by disinfection.  No increase in treatment capacity is proposed within the application.  

IV.	RECEIVING WATERS – Myers Creek.  The receiving stream is located within the Pascagoula Basin and is classified as Fish and Wildlife.  At the point of discharge the receiving stream does not appear on the current State of Mississippi 303(d) list of evaluated or impaired waterbodies.  The discharge appears on Total Maximum Daily Load for Biological Impairment Due to Organic Enrichment/Low Dissolved Oxygen and Nutrients, but the facility is exempted from nutrients monitoring.  Only one discharge to surface waters is described within the application with no increase in flow proposed. 

V.	APPLICABLE GUIDELINES – 11 MS Admin Code pt. 6, Commercial (Domestic) Guidelines, TMDL

VI.	SUMMARY OF LIMITATIONS – 
Parameter 			Value				Basis
Flow				0.015 MGD			Design
BOD5				30 mg/l (max mo avg)		Domestic Guidelines
Ammonia Nitrogen		0.250 (max moa vg)		TMDL
TSS				90 mg/l (max mo avg)		Technology
E. Coli				126 Col./100 ml		Admin Code 
Chlorine, Total Residual 	0.1 – 1.0 mg/l 			Domestic Guidelines
pH				6.0 – 9.0 SU			Admin Code