PERMIT RATIONALE FOR REISSUANCE
First Presbyterian Church of Jackson, Mississippi, Twin Lakes Conference Center
Rankin County
Florence, Mississippi
Water NPDES No. MS0056600
May 2024

I.	CLASSIFICATION – NPDES Commercial

II.	DESCRIPTION OF WASTEWATER – Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated biologically via an activated sludge plant followed by chlorine disinfection prior to discharge. Only one discharge to surface waters is described within the application with no increase in treated effluent flow proposed. 

IV.	RECEIVING WATERS – Unnamed Tributary of Rocky Creek. The receiving waters are located in the Pearl River basin drainage basin and are 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 Impaired Waterbodies but does appear on a completed Total Maximum Daily Load (TMDL) for Fecal Coliform done for the Pearl River.

V.	APPLICABLE GUIDELINES – Mississippi Admin Code pt. 6

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

	Parameter		Value			Basis
	Flow			0.035 MGD		Design
	BOD			30 mg/l 			Technology
	TSS 			90 mg/l 			Technology
	E. coli			126 Col./100mL 		MSWQS
	pH			6.0 to 9.0 S.U.		MSWQS
	Chlorine			0.1 to 1.0 mg/l		Technology
	
VII.	CHANGES FROM PREVIOUS PERMIT – 

No Change