PERMIT RATIONALE FOR REISSUANCE
Falkner POTW
Tippah County
Falkner, Mississippi
Water NPDES No. MS0029025
April 2018

I.	FACILITY INFORMATION

Facility Name:  Falkner POTW
Facility Address:  Railroad Street 
Tippah County Road 264
Falkner, MS  39629    
Permit No.:  MS0029025
SIC:  4952
Permit Writer:  Taylor White
EPD Branch:  Municipal and Private Facilities Branch

II.	NATURE OF BUSINESS - Municipal Wastewater

III.	EFFLUENT AND RECEIVING STREAM FLOW DATA - Municipal wastewater is collected and treated in a conventional lagoon.  This facility is operating as a Hydrological Controlled Release system and will no discharge when the receiving is below 0.5 cfs flow.  No increase in the annual average flow proposed within the modification. 

IV.	RECEIVING WATERS – Muddy Creek.  The receiving water is located within the Northern Independent Stream Basin, and is classified as Fish and Wildlife.  Muddy Creek does not appear on the updated State of Mississippi 303(d) list impaired waterbodies. The discharge is listed in the TMDL for biological impairment due to organic enrichment/ low do and nutrients for Muddy Creek. This TMDL recommends monitoring of Total Phosphorus and Total Nitrogen for the discharge, and have been included in the permit to comply with the TMDL.

V.	APPLICABLE GUIDELINES –11 Mississippi Admin. Code pt. 6 (Admin. Code), Municipal Facility Guidelines (Technology), Wasteload Allocation (WLA), and  Total Maximum Daily Load (TMDL).

VI.	SUMMARY OF LIMITATIONS –

Parameter			Value					Basis
Flow				0.06 MGD 				Design
BOD				45 mg/l 				WLA
NH3-N				14 mg/l 				WLA
TSS				90 mg/l 				Technology
pH				6.0 to 9.0 S.U.				Admin. Code
Phosphorus, Total 		Report 					TMDL
Nitrogen, Total			Report 					TMDL

Effluent shall not be discharged to the receiving stream when the stream flow is less than 0.5 CFS. When the strem flow is above 0.5 CFS but below 2.0 CFS, the facility can discharge up to 0.06 MGD.  When the strem flow is above 2 CFS but below 4.0 CFS, the facility can discharge up to 0.21 MGD. When the strem flow is above 4 CFS, the facility can discharge up to 0.42 MGD.   WLA limits are based on regulations for HCR discharges.
In this modification, the statistical basis for annual loading parameters (flow, BOD, TSS) has been changed from Maximum Monthly Average to Annual Average to be represent the non-continuous nature of this the HCR as allow by 40 CFR 124.45.  
Additionally, this permit requires the following:
Permittee shall Submit a report: Due annually by the 15th of January detailing date, time, and stream stage when the discharge begin; date, time, and stream stage when the discharge ceased; and the volume of wastewater released for each discharge that occurred in that year.