PERMIT RATIONALE FOR REISSUANCE
Dealers Auto Auction of Jackson, LLC
Rankin County
Pearl, Mississippi
Water NPDES No. MS0059846
May 14, 2024

I.	FACILITY INFORMATION

Facility Name:  Dealers Auto Auction of Jackson, LLC
Facility Address:  1657 Old Whitfield Road
 Pearl, MS  39208    
Pearl, 
Permit No.:  MS0059846
SIC:  7542
Permit Writer:  Rajeev Gupta
EPD Branch:  Water Branch II

II.	NATURE OF BUSINESS

The applicant operates as a Vehicle Auctioneer.

III.	EFFLUENT AND RECEIVING STREAM FLOW DATA

One outfall has been applied to be permitted for.  The effluent from the facility consists of sanitary wastewater (Outfall 002).  The design flow from the facility is 5,000 gpd.  The effluent from the facility discharges to an unnamed tributary of Richland Creek. The creek has intermittent flow (7Q10  = 0 MGD).  The facility previously discharged car washing wastewater through Outfall 001.  The facility has ceased this operation, and it was not applied for as part of the application.  

IV.	303(d) ISSUES

The receiving stream does not appear on the 2022 State of Mississippi 303(d) List of Impaired Waterbodies. This permit complies with the following applicable TMDLs:

•	Fecal Coliform TMDL for Segments of the Pearl River, the Strong River, Halls Creek, and Pretty Branch Pearl River Basin, Copiah, Pearl River, Simpson and Lawrence Counties (Final January 2012)
•	Total Maximum Daily Load Designated Streams in the Pearl River Basin for Impairment Due to Sediment (March 25, 2009; ID# 50932501)
•	Total Maximum Daily Load Total Nitrogen and Total Phosphorus for the Pearl River Pearl River Basin (Final Report June 29, 2009)
•	Total Maximum Daily Loads for The Legacy Pesticides DDT and Toxaphene, in the Pearl River, South Independent Streams, and Lower Mississippi River Basins (January 2007; ID# 507010401)
•	Fecal Coliform TMDL for Pearl River Pearl River Basin, Hancock County, Mississippi (Final Report December 2000; ID# 500121503)
•	TMDL for Low pH in the Pearl River Pearl River Basin Neshoba, Leake, Hinds, Rankin, and Hancock Counties, Mississippi (Final TMDL December 2000; ID: 500121501)
•	Fecal Coliform TMDL for Pearl River Pearl River Basin, Marion County, Mississippi (Final Report December 2000; ID# 500121502)
•	Fecal Coliform TMDL for Segments of the Pearl River, the Strong River, Halls Creek, and Pretty Branch Pearl River Basin, Copiah, Pearl River, Simpson and Lawrence Counties (ERRATA  August 2021)
•	Total Maximum Daily Load  Total Nitrogen and Total Phosphorus for the Pearl River from Ross Barnett Reservoir to the Strong River Hinds, Rankin, Simpson, and Copiah Counties Pearl River Basin (Final April 2015)
•	Fecal Coliform TMDL for Pearl River Pearl River Basin, Hinds County, Mississippi (Final Report December 1999; ID: 599121502)
•	Total Maximum Daily Load Nutrients and Organic Enrichment/Low Do for Richland Creek Pearl River Basin Rankin County, Mississippi (Final Report December 2008; ID: 508121804)

V.	TYPE OF WASTEWATER TREATMENT:

The sanitary wastewater from the on-site buildings combine and are routed to a septic tank.  After passing though the septic tank, the wastewater undergoes treatment in an aerated treatment unit (ATU) followed by chlorination in an effluent wet well.  The wastewater is then routed to a final sedimentation pond prior to discharge. Sampling for all parameters, except for chlorine, occurs in the wet well. Chlorine sampling occurs prior to the wastewater entering the final sedimentation pond.

VI.	EPA APPLICABLE CATEGORICAL GUIDELINES

None.  

VII.	DATA FROM APPLICATION FORM 

	The Mississippi Small Domestic NPDES Application was used to reapply for the NPDES 	permit.  

VIII. 	WATER QUALITY LIMITATIONS BASED ON WASTELOAD ALLOCATION 

	Not applicable.  

IX.	CATEGORICAL GUIDELINE LIMITATIONS CALCULATIONS

Not applicable.  

X.	TOXICITY SCREENING

Not applicable.  

XI.	PROPOSED FINAL LIMITATIONS 

	Average Permit Limitations

Outfall	Parameter	Categorical Limitation	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
MS0059846-002
Treated Domestic Sanitary Wastewater	BOD5	--	30 mg/l	30 mg/l	30 mg/l	Domestic Guidelines	
	TSS	--	30 mg/l	30 mg/l	30 mg/l	Domestic Guidelines	
	E. Coli	--	126 Col./100mL	---	126 Col./100mL	MSWQS	
	pH	--	6.0 – 9.0 S.U.	6.0 – 9.0 S.U.	6.0 – 9.0 S.U.	MSWQS	

Maximum Permit Limitations

Outfall	Parameter	Categorical Limitation	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
MS0059846-002
Treated Domestic Sanitary Wastewater	BOD5	--	45 mg/l	45 mg/l	45 mg/l	Domestic Guidelines	
	TSS	--	45 mg/l	45 mg/l	45 mg/l	Domestic Guidelines	
	E. Coli	--	410 Col./100mL	---	410 Col./100mL	MSWQS	
	pH	--	6.0 – 9.0 S.U.	6.0 – 9.0 S.U.	6.0 – 9.0 S.U.	MSWQS 	
	Chlorine, total residual	--	0.1 – 1.0 mg/l	0.1 – 1.0 mg/l	0.1 – 1.0 mg/l	Domestic Guidelines	

Monitoring.

Annual sampling of the outfall 002 (Treated Domestic Sanitary Wastewater), with the exception for Total Residual Chlorine, is required in the wet well.  Sampling shall be performed using grab samples. Sampling for Total Residual Chlorine shall be conducted prior to entering the sedimentation basin. This permit is consistent with other permits written for similar operations.  Permit limitations are based on the State of Mississippi Water Quality Criteria and Domestic Facility Guidelines (Technology) for treated domestic sanitary wastewater.  One special condition of the permit shall be that there shall no discharge from Outfall 001.