PERMIT RATIONALE FOR REISSUANCE
Pecan Grove Trailer Park
Lamar County
Hattiesburg, Mississippi
Water NPDES No. MS0047473
March 19, 2026

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.  No increase in treated effluent flow is proposed within the application.	

IV.	RECEIVING WATERS – Unnamed tributary of Mixon’s Creek.  The receiving waters are located within the Pascagoula River Basin and are classified as Fish and Wildlife.  At the point of discharge the receiving stream does not appear on the most recent State of Mississippi 303(d) list of evaluated or impaired waterbodies.  The discharge is included in the Total Maximum Daily Load (TMDL) for Organic Enrichment / Low Dissolved Oxygen and Nutrients in Bowie Creek and Bowie River (June 2005).  Only one discharge to surface waters is described within the application with no increase in treated effluent flow proposed.  

V.	APPLICABLE GUIDELINES – State of Mississippi Wastewater Regulations, 11 MS Admin Code pt. 6 , Commercial Guidelines (Technology), Total Maximum Daily Load (TMDL)

VI.	SUMMARY OF LIMITATIONS –
	Parameter			Value				Basis
	Flow				0.0038 MGD			Design
	BOD5				30 mg/l (Yearly Avg.)		11 MS Admin Code
	TSS				90 mg/l (Yearly Avg.)		Technology
	Ammonia Nitrogen 		2.0 mg/l (Yearly Avg.)	TMDL
	Dissolved Oxygen		> 6.0 mg/l 			TMDL
	E. Coli				126 Col./100 ml		11 MS Admin Code
	Chlorine, Total Residual	0.1 – 1.0 mg/l 			11 MS Admin Code
	pH				6.0 – 9.0 SU			11 MS Admin Code