PERMIT RATIONALE FOR REISSUANCE
Shady Nook Inc
Coahoma County
Lyon, Mississippi
Water NPDES No. MS0058246
April 4, 2017

I.	CLASSIFICATION – Commercial Minor

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Domestic wastewater is collected from the proposed convenience store and is treated biologically by means of an aerated treatment unit.  A capacity flow of 0.0015 MGD is design for this system.  

IV.	RECEIVING STREAM – North Delta Drainage District.  The receiving water is located within the Yazoo 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 for evaluated impaired waterbodies. 

V.	APPLICABLE GUIDELINES – State of Mississippi Water Quality Criteria, Commercial Facility Guidelines

VI.	SUMMARY OF LIMITATIONS –
Parameters			Value				Basis
Flow				0.0015 MGD			Design
BOD5				30 mg/l			Commercial Guidelines
TSS				30 mg/l			Commercial Guidelines
E Coli				126 Col./100 ml		11 MS admin code part 6	
Total Residual Chlorine	0.1 – 1.0 mg/l			Commercial Guidelines
pH				6.0 – 9.0 SU			Commercial 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).