PERMIT RATIONALE FOR REISSUANCE
Hedgewood Mobile Home Community
Lamar County
Oak Grove, Mississippi
Water NPDES No. MS0039331
June 2024

I.	CLASSIFICATION – Domestic NPDES

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated by means of a conventional lagoon. 

IV.	RECEIVING WATERS – Unnamed tributary thence Mixon’s Creek.  The receiving stream is located within the Pascagoula River Basin and is 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 is listed in the Total Maximum Daily Load (TMDL) for Nutrients and Organic Enrichment/Low Dissolved Oxygen for Bowie Creek and Bowie River (June 2005). The facility complies with the limits imposed by the TMDL. In addition, the discharge appears on a Fecal Coliform TMDL for the Black Creek, which the facility complies with via disinfection. Only one discharge to surface waters is described within the application with no increase in flow proposed in the application.  

V.	APPLICABLE GUIDELINES – 11 MS Admin Code pt. 6, Domestic Guidelines

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 
Parameter		Value					Basis
Flow			0.005 MGD			Design
BOD5			30 mg/l (Monthly Average)		Domestic Guidelines
TSS			90 mg/l (Monthly Average)		Domestic Guidelines
Ammonia Nitrogen	2.0 mg/l (Monthly Average)		Admin Code
Dissolved Oxygen	≥ 6.0 mg/l (Monthly Average)	Admin Code
E. Coli			126 Col/100 ml (Monthly Average)	Admin Code
Chlorine		0.1 – 1.0 mg/l		Domestic Guidelines
pH			6.0 – 9.0 SU		Admin Code