PERMIT RATIONALE FOR REISSUANCE
B and B Electrical and Utility Contractors Inc
Rankin County
Brandon,, Mississippi
Water NPDES No. MS0060038
April 25, 2013

I.	FACILITY INFORMATION

Facility Name:  B and B Electrical and Utility Contractors Inc
Facility Address:  124 Baker Lane 
 Brandon, MS  39047    
Brandon, 
Permit No.:  MS0060038
SIC:  1623
Permit Writer:  Greg Mallery
EPD Branch:  Construction and Building Materials Branch

II.	NATURE OF BUSINESS

The application details construction and operation of B and B Electrical and Utility Contractors, Inc.  The effluent will contain treated truck/vehicle wash wastewater and domestic sanitary effluent from on-site buildings.  The design for the system is detailed in the application.

III.	EFFLUENT AND RECEIVING STREAM FLOW DATA

Effluent from a domestic septic system combines with effluent from a vehicle washing operation (Outfall 001), thence to an unnamed tributary which leads to Plummer Slough, thence to Pelahatchie Creek.   The Plummer Slough has intermittent flow (7Q10 = 0 MGD) with a proposed maximum effluent discharge of 1,250 gallons per day (0.00125 MGD).  

IV.	303(d) ISSUES

None.

V.	TYPE OF WASTEWATER TREATMENT:

Domestic Sanitary:  The sanitary wastewater from the on-site buildings combine and are discharged to a septic system.  The septic system effluent is then combined with vehicle wash effluent, thence to Outfall 001.

Car Wash Wastewater:  The vehicle washing operation discharges to a settling chamber, thence to an oil/water separator.  This effluent combines with the treated domestic sanitary effluent, thence to Outfall 001.  

VI.	EPA APPLICABLE CATEGORICAL GUIDELINES

None.

VII.	DATA FROM APPLICATION FORM (Enter the type of application, i.e. 2D)

	A Short Form D was used, thus no detailed data is provided

VIII. 	WATER QUALITY LIMITATIONS BASED ON WASTELOAD ALLOCATION 

	Not applicable with this type of commercial operation.

IX.	CATEGORICAL GUIDELINE LIMITATIONS CALCULATIONS

Not Applicable.

X.	TOXICITY SCREENING

Not Applicable.

XI.	PROPOSED FINAL LIMITATIONS 

1.	Average Permit Limitations

Outfall	Parameter	Categorical Limitation	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
MS0060038-001
	Chlorine, Total Residual	--	0.1 mg/l
Minimum	--	0.1 mg/l
Minimum	Domestic Guidelines	
	Flow	--	--	--	Report	--	
	pH	--	6.0 – 9.0 S.U.	--	6.0 – 9.0 S.U.	State WQS	
	BOD - 5	--	30 mg/l	--	30 mg/l	Domestic Guidelines	
	TSS	--	30 mg/l	--	30 mg/l	Domestic Guidelines	
	Fecal Coliform	--	200 Col./100mL	--	200 Col./100mL	Domestic Guidelines	
	Oil & Grease	--	10 mg/l	--	10 mg/l	State WQS	

2.	Maximum Permit Limitations

Outfall	Parameter	Categorical Limitation	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
MS0060038-001
	Chlorine, Total Residual	--	1.0 mg/l	--	1.0 mg/l	Domestic Guidelines	
	Flow	--	--	--	Report	--	
	pH	--	6.0 – 9.0 S.U.	--	6.0 – 9.0 S.U.	State WQS	
	BOD - 5	--	45 mg/l	--	45 mg/l	Domestic Guidelines	
	TSS	--	45 mg/l	--	45 mg/l	Domestic Guidelines	
	Fecal Coliform	--	400 Col./100mL	--	400 Col./100mL	Domestic Guidelines	
	Oil & Grease	--	15 mg/l	--	15 mg/l	State WQS	

Annual sampling of the outfall 001 is required.  This is consistent with other permits written for similar operations.  NPDES permits for car washing operations have historically not had monitoring requirements for oil & grease and TSS, but because the operators intend to combine the waste streams prior to discharging, annual monitoring is required.

The permit is based on Mississippi Wastewater Regulations.