PERMIT RATIONALE FOR REISSUANCE
Jones County Schools, Northeast Jones High School
Jones County
Laurel, Mississippi
Water NPDES No. MS0031283
July 2021

I.	CLASSIFICATION – Commercial NPDES 

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater 

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated biologically by means of an aerated lagoon followed by disinfection via tablet chlorination.  No increase in treated effluent flow is proposed within the application.  

IV.	RECEIVING WATER – Blacksnake Creek thence into Bogue Homo River.  The receiving waters are located within the Pascagoula River Basin and are classified as Fish and Wildlife.  At the point of discharge, neither receiving stream appears on the 2020 State of Mississippi 303(d) list of evaluated or impaired waterbodies.  The discharge is listed in the Total Maximum Daily Load (TMDL) for Biological Impairment Due to Organic Enrichment/Low Dissolved Oxygen and Nutrients (June 2005).  This facility performs quarterly nutrient monitoring in order to comply with the conditions of the TMDL. Only one discharge to surface waters is described within the application.

V.	APPLICABLE GUIDELINES – 11 Mississippi Admin Code Pt. 6, Commercial Facility Guidelines (Technology), MS Water Quality Standards, Total Maximum Daily Load (TMDL)

VI.	CHANGES TO PREVIOUS PERMIT - E. coli has replaced fecal coliform as the bacterial indicator for all freshwaters in Mississippi designated as Recreation, Fish and Wildlife Support, and/or Public Water supply. 

VII.	SUMMARY OF LIMITATIONS –

	Parameter						Value			Basis
	Flow						0.0484 MGD			Design
	BOD5						30 mg/l (Yearly Average)	Technology
	TSS						60 mg/l (Yearly Average)	Technology
	E. coli						126 Col./100 ml			MS WQS
	Chlorine, Total Residual 			0.1 – 1.0 mg/l 			Technology
	Nitrogen (Total)					Report mg/l			TMDL
	Phosphorus (Total)					Report mg/l			TMDL