Title: PERMIT RATIONALE
Author: Preferred Customer
Last saved by: Josh Campbell
Company: Dell Computer Corporation

PERMIT RATIONALE FOR REISSUANCE
Rankin County School District, McLaurin Attendance Center
Rankin County
Florence, Mississippi
Water NPDES Permit No. MS0038466
April 2024

I.	CLASSIFICATION – NPDES Commercial

II.	DESCRIPTION OF WASTEWATER – Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated via an aerated laggon 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 – Dry Creek thence into Richland Creek. The receiving waters are located in the Pearl River 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. The discharge does appear on a completed Total Maximum Daily Load (TMDL) for Fecal Coliform in the Pearl River. The facility utilizes chlorine disinfection, which complies with the conditions of the TMDL.

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

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

Parameter		Value				Basis
Flow			0.03 MGD		Design
BOD			30 mg/l 			Technology
TSS 			60 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 from last reissuance

13911 PER20240001