PERMIT RATIONALE FOR REISSUANCE
US Army COE, Dewayne Hayes Recreation Area
Lowndes County
Columbus, Mississippi
Water NPDES No. MS0046396
June 19, 2024

I.	CLASSIFICATION –Commercial NPDES Minor 

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated by an aerated lagoon.  No increase in flow is proposed within the application.  

IV.	RECEIVING WATERS – Tennessee-Tombigbee Waterway.  The receiving water is located within the Tombigbee River Basin, and is classified as Recreational.  The receiving water does not appear on the current State of Mississippi 303(d) list of impaired waterbodies nor a TMDL has been conducted for this receiving stream.

V.	APPLICABLE GUIDELINES – State of Mississippi Wastewater Regulations (11 MS admin code part 6),  State of Mississippi Water Quality Criteria (11 MS admin code part 6), Commercial Facility Guidelines (Technology)

VI.	SUMMARY OF LIMITATIONS –
Parameter			Value						Basis
Flow				0.01 MGD					Design
BOD5				30 mg/l (Max Monthly Average)		Technology
TSS				60 mg/l (Max Monthly Average)		Technology
E. Coli				126 Col./100 ml				11 MS admin code part 6	
Chlorine, Total Residual	0.1 – 1.0 SU					Technology
pH				6.0 – 9.0 SU				11 MS admin code part 6