PERMIT RATIONALE FOR REISSUANCE

Howard Industries Inc      
Simpson County
Mendenhall, Mississippi
NPDES Permit No. MS0056731  
June 7, 2024

I.	FACILITY INFORMATION
						
Facility Name:  	Howard Industries Inc      
Facility Address:  	2778 Simpson Highway 49 South     
	Mendenhall, MS  39114
Ridgeland, 
Permit No.:  		MS0056731 
SIC Code:  		3648 – Lighting Equipment, Not Elsewhere Classified      
Permit Writer:  	Carter Cress
EPD Branch:  		Water II    

II.	NATURE OF BUSINESS

This facility is a warehousing operation for electrical ballasts and an assembler of transformer components.    

III.       EFFLUENT AND RECEIVING STREAM FLOW DATA

Outfall No.	Discharge Type	Receiving Stream	Basin	Outfall Coordinates	
001	Treated Sanitary Wastewater and Storm Water	unnamed tributary of Sellers Creek	Pearl River	Lat.: 31° 55´ 30.38´´ Long.: 89° 48´ 39.28´´ 	

IV.       TOTAL MAXIMUM DAILY LOAD (TMDL) AND 303(d) ISSUES

Sellers Creek, and any unnamed tributaries thereof, is not listed on the Mississippi 2022 Section 303(d) List of Impaired Water Bodies.  

The permit complies with the following completed TMDL:

1.  Report ID No. Unknown – Strong River Watershed – pH – May 2014

V.       TYPE OF WASTEWATER TREATMENT

Chlorination thence an aerated lagoon system.   
       
VI.      EPA APPLICABLE CATEGORICAL GUIDELINES

Not applicable.  
VII.   DATA FROM APPLICATION FORM 2E

Parameter	Maximum Daily Discharge	Average Daily Discharge	
Biochemical Oxygen Demand (BOD5)	33 mg/L	26.8 mg/L	
Total Suspended Solids (TSS)	140 mg/L	77.8 mg/L	
Oil and Grease	2.2 mg/L	1.5 mg/L	
Ammonia (as N)	0.4 mg/L	0.227 mg/L	
E. coli	7 col./100 mL	3.5 col./100 mL	
Discharge Flow	0.4635 MGD	---	
pH 	8.89 SU	7.3 SU (min.)	
Temperature (winter)	61 °F	33 °F (min.)	
Temperature (summer)	91 °F	66 °F (min.)	
	
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 No.	Parameter	Categorical Limitation	Water Quality Limitation	Current Permit Limitation	Proposed Permit Limitation	Basis1	
001	Flow	N/A	N/A	Report	Report	CPL	
	Carbonaceous BOD5	N/A	N/A	10 mg/L	10 mg/L	CPL	
	Oil and Grease	N/A	N/A	10 mg/L	10 mg/L	CPL	
	Ammonia (as N)	N/A	N/A	2.0 mg/L	2.0 mg/L	CPL	
	TSS	N/A	N/A	30 mg/L	30 mg/L	CPL	
	E. coli	N/A	126 col./100 mL	126 col./100 mL	126 col./100 mL	MSWQS	
	Total Residual Chlorine	N/A	0.011 mg/L	0.011 mg/L	0.011 mg/L	MSWQS	
	Dissolved Oxygen	N/A	4.0 mg/L (min.)	6 mg/L (min.)	6 mg/L (min.)	CPL	
	pH 	N/A	6.0 SU (min.)	6.0 SU (min.)	6.0 SU (min.)	MSWQS	
	
	Maximum Permit Limitations

Outfall No.	Parameter	Categorical Limitation	Water Quality Limitation	Current Permit Limitation	Proposed Permit Limitation	Basis1	
001	Flow	N/A	N/A	Report	Report	CPL	
	Carbonaceous BOD5	N/A	N/A	15 mg/L	15 mg/L	CPL	
	Oil and Grease	N/A	N/A	15 mg/L	15 mg/L	CPL	
	Ammonia (as N)	N/A	N/A	3.0 mg/L	3.0 mg/L	CPL	
	TSS	N/A	N/A	45 mg/L	45 mg/L	CPL	
	E. coli	N/A	410 col./100 mL	410 col./100 mL	410 col./100 mL	MSWQS	
	Total Residual Chlorine	N/A	0.019 mg/L	0.019 mg/L	0.019 mg/L	MSWQS	
	pH 	N/A	9.0 SU	9.0 SU	9.0 SU	MSWQS	

1 Basis: CPL = Current Permit Limitation; MSWQS = Mississippi Water Quality Standard.  

Carbonaceous BOD5, TSS, and pH shall be monitored via grab sampling twice per month.  Ammonia nitrogen, total residual chlorine, E. coli, oil and grease, and dissolved oxygen shall be monitored via grab sampling once per month.  Flow shall be monitored via a continuous recorder daily.  All monitoring results shall be submitted on a monthly DMR.  

No changes to permit limits are proposed for this reissuance.