PERMIT RATIONALE FOR REISSUANCE
Great River Utility Operating Company LLC, 
Kerry Estates, New Hope Garden Apartments
Lowndes County
Columbus, Mississippi
Water NPDES No. MS0036609
May 28, 2024

I.	CLASSIFICATION – NPDES Commercial

II.	DESCRIPTION OF WASTEWATER – Domestic Wastewater

III.	DESCRIPTION OF WASTEWATER TREATMENT – Wastewater is collected and treated by means of an activated sludge system.  

IV.	RECEIVING WATERS – Unnamed Tributary of McCrary Creek.  The receiving stream does not appear on the current 303(d) list of Impaired water bodies. The receiving waters are located within the Tombigbee River Basin, and are classified as Fish and Wildlife. The discharge is included in a TMDL for McCrary Creek for Nutrients, Oxygen Enrichment, and low DO. All the limitations are included in the permit are based on the conditions of the TMDL. 

V.	APPLICABLE GUIDELINES – 11 MS admin code part 6, Commercial Facility Guidelines (Technology), Wasteload Allocation (WLA), Total Maximum Daily Load (TMDL), Best Professional Judgment (BPJ)
VI.	SUMMARY OF LIMITATIONS –

Parameter				Flow					Basis
Flow					0.0186 MGD				Design
BOD5					30 mg/l					Previous Permit
TSS					30 mg/l					Technology
E. Coli					126 Col./100 ml			11 MS admin code part 6
Chlorine, Total Residual		0.019 mg/l / 0.032 mg/l		11 MS admin code part 6
pH					6.0-9.0 SU			11 MS admin code part 6
NH3-N					4.0 mg/l				TMDL
Nitrogen, Total				2.11lbs/day 				TMDL
Phosphorus, Total			0.9 lbs/day				TMDL
Minimum DO				6.0 mg/l				TMDL

The minimum and maximum values for Influent ph, Dissolved Oxygen in aeration unit, and 30-Minute Sludge Settleability in aeration unit must be reported