PERMIT RATIONALE FOR REISSUANCE
Wilco Properties Inc, LaBelle Estates Subdivision
Lowndes County
Columbus, Mississippi
Water NPDES No. MS0039454
August 24, 2017

I.	CLASSIFICATION – Domestic NPDES

II.	DESCRIPTION OF WASTEWATER – Minor Domestic

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected and treated through an aerated lagoon.  

IV.	RECEIVING WATERS – Magby Creek.  Magby Creek does not appear on the current 303(d) List of Impaired Waterbodies nor a TMDL has been conducted for this receiving stream.  This waterbody is in the Tombigbee River drainage basin.  Magby Creek is classified as Fish and Wildlife.  One discharge to surface waters is described within the application with no increase in flow proposed. The discharge from this facility should not further impair water quality.
  
V.	APPLICABLE GUIDELINES – State of Mississippi Wastewater Regulations (WPC-1),  State of Mississippi Water Quality Criteria (WPC-2), Commercial Facility Guidelines

VI.	SUMMARY OF DISCHARGE LIMITATIONS – 

Parameter		Value					Basis
Flow			0.06 MGD				Design
BOD			30 mg/l (Yearly Average)		Domestic Guidelines
TSS			60 mg/l (Yearly Average)		Domestic Guidelines
E. Coli			126 Col./100mL (Yearly Average)	Domestic Guidelines
pH			6.0 to 9.0 S.U.				MS WQC
Chlorine		0.1 to 1.0 mg/l				Domestic Guidelines

E. Coli will now be the bacterial indicator used for all freshwaters in MS designated as Recreation, Fish and Wildlife Support, and /or Public Water supply (replacing the use of fecal coliform).