PERMIT RATIONALE FOR REISSUANCE
Tennessee Gas Pipeline Company LLC, Dekalb Compressor Station Number 542
Kemper County
Daleville, Mississippi
Water NPDES No. MS0045462
April 11, 2017

I.	FACILITY INFORMATION

Facility Name:  	Tennessee Gas Pipeline Company LLC,
			 Dekalb Compressor Station Number 542
Facility Address:  	538 Pumping Station Road 
	Daleville, MS  39326    
Houston, 
Permit No.:  		MS0045462
SIC:  			4922
Permit Writer:  	John Havard
EPD Branch:  		Energy and Transportation Branch

II.	NATURE OF BUSINESS

Tennessee Gas Pipeline Company LLC is a natural gas transmission company engaged in the interstate transmission of natural gas through a series of subsurface pipelines.  There are no categorical standards for this industry.

III.	EFFLUENT AND RECEIVING STREAM FLOW DATA

The facility has consolidated the two outfalls into one outfall.  The effluent consists of compressor building drainage, equipment cleaning, and compressed air system water with an average flow of 2000 gallons per year.  The unnamed tributary flows to the Sucarnoochee River with HUC code of 03160202 and lies in the Tombigbee River Basin. 

IV.	303(d) ISSUES

No 303d issues were noted in the 2016 Impaired Water Bodies Report.

V.	TYPE OF WASTEWATER TREATMENT:

The facility has an evaporator with a 12,000 gallon holding tank.  There are also two settling ponds used as a backup to the evaporator.

VI.	EPA APPLICABLE CATEGORICAL GUIDELINES

There are no categorical guidelines established for this industry.

VII.	DATA FROM APPLICATION FORM (2C)

Parameter	Maximum Daily Value	
BOD, mg/l	3 	
COD, mg/l	53	
TOC, mg/l	13.07	
Ammonia, mg/l	Less than 0.1	
Flow, MGD	0.043	
Temperature, winter, deg F	55.4	
Temperature, summer, deg F	73	
Minimum pH	7.4	
Maximum pH	8.5	
Oil and grease, mg/l	6	

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 

1.	Average Permit Limitations

Outfall	Parameter	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
MS0045462-001	Oil and Grease	-----	10 mg/L	10 mg/L	Previous Permit	
MS0045462-001	pH	6.0 s.u.	6.0 s.u.	6.0 s.u.	WQC	
MS0045462-001	Flow	-----	Report Quarterly Avg	Report Quarterly Avg	Previous Permit	

2.	Maximum Permit Limitations

Outfall	Parameter	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
MS0045462-001	Oil and Grease	-----	15 mg/L	15 mg/L	Previous Permit	
MS0045462-001	pH	9.0 s.u.	9.0 s.u.	9.0 s.u.	WQC	
MS0045462-001	Flow	-----	Report Quarterly Avg	Report Quarterly Avg	Previous Permit	
MS0045462-001	Temperature	90 deg F	90 deg F	90 deg F	WQC	

	All sampling will be done twice per quarter with reporting once per quarter.  

XII.	BPJ STATEMENT: 

It is our Best Professional Judgement that the foregoing limitations represent conditions for protection of water of the State of Mississippi.