PERMIT RATIONALE FOR REISSUANCE
M D Utilities LLC, Bridgefield Subdivision
Lamar County
Hattiesburg, Mississippi
Water NPDES No. MS0052141
April 2020

I.	CLASSIFICATION – Commercial NPDES 

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated biologically by means of an aerated lagoon followed by disinfection.  No increase in treatment capacity is proposed within the application.  

IV.	RECEIVING WATERS – Unnamed creek thence into Parker 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 appears on a completed Fecal Coliform TMDL for 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.  

V.	APPLICABLE GUIDELINES – 11 Miss. Admin Code pt. 6 Ch. 1 & 2, Commercial (Domestic) Guidelines

VI.	SUMMARY OF LIMITATIONS –
Parameter				Value			Basis
	Flow					0.092 MGD			Design
	BOD5					30 mg/l (Max Mo. Avg.)		Domestic Guidelines
	TSS					60 mg/l (Max Mo. Avg)		Technology
	E. Coli					126 Col./100 ml			Admin Code
	Chlorine, Total Residual	0.1 – 1.0 mg/l 			Domestic Guidelines
	pH					6.0 – 9.0 SU			Admin Code