PERMIT RATIONALE FOR REISSUANCE
Hinds County Human Resource Agency, Saint Thomas Headstart
Hinds County
Bolton, Mississippi
Water NPDES No. MS0042102
June 9, 2025

I.	FACILITY INFORMATION

Facility Name: Hinds County Human Resource Agency, Saint Thomas Head Start
Facility Address: 3850 South Norrell Road, Bolton, Mississippi 39041
Permit No.: MS0042102 (NPDES Minor Industrial)
SIC: 8351 (Child Day Care Services)
Permit Writer: Sandeepa Gill 
EPD Branch: Municipal and Commercial Wastewater Division 

II.	NATURE OF BUSINESS

Hinds County Human Resource Agency, Saint Thomas Head Start’s operations include child day care services.  The wastewater effluent will contain domestic sanitary effluent from on-site building. 

III.	EFFLUENT AND RECEIVING STREAM FLOW DATA

Effluent from domestic sanitary is collected and treated, and through Outfall 001 is discharged to an unnamed tributary of Little Bakers Creek, located in the Big Black River drainage basin and classified as Fish and Wildlife.

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

The discharge is included in a TMDL established for Fourteen Mile Creek for Nutrients and Organic Enrichment / Low Dissolved Oxygen and it is also listed in a Pathogens TMDL.  The effluent is required to meet State criteria for Pathogens prior to discharging, which complies with the TMDL.

V.	TYPE OF WASTEWATER TREATMENT

Domestic wastewater is collected and treated via an aerobic treatment unit.  Chlorine tablets are utilized for disinfection purposes.  No increase in treatment capacity is proposed within the application.

VI.	EPA APPLICABLE CATEGORICAL GUIDELINES

Not applicable.

VII.	PROPOSED FINAL LIMITATIONS

1.	Average Permit Limitations: Outfall 001

Parameter	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
Biochemical Oxygen Demand, 5-day (mg/l)	-----	30	30	Domestic Guidelines	
Total Suspended Solids (mg/l)	-----	30	30	Domestic Guidelines	
E. coli (# of colonies per 100 ml)	126	126	126	11 MS admin code part 6	
Total Residual Chlorine (mg/l) (min)	-----	0.1	0.1	Domestic Guidelines	
pH (S.U.) (min)	6.0	6.0	6.0	11 MS admin code part 6	
Flow (MGD)	-----	0.0015	0.0015	Best Technical Judgement	
Dissolved Oxygen (mg/l) (min)	-----	6.0	6.0	Total Maximum Daily Load	
Total Ammonia Nitrogen (as N) (mg/l)	-----	2.0	2.0	Total Maximum Daily Load	
Total Nitrogen (lbs/day)	-----	0.17	0.17	Total Maximum Daily Load	
Total Phosphorus (lbs/day)	-----	0.07	0.07	Total Maximum Daily Load	

2.	Maximum Permit Limitations: Outfall 001

Parameter	Water Quality Limitation	Present Permit Limitation	Proposed Permit Limitation	Basis	
Biochemical Oxygen Demand, 5-day (mg/l)	-----	45	45	Domestic Guidelines	
Total Suspended Solids (mg/l)	-----	45	45	Domestic Guidelines	
E. coli (# of colonies per 100 ml)	410	410	410	11 MS admin code part 6	
Total Residual Chlorine (mg/l)	-----	1.0	1.0	Domestic Guidelines	
pH (S.U.)	9.0	9.0	9.0	11 MS admin code part 6	
Flow (MGD)	-----	Report	Report	Best Technical Judgement	
Dissolved Oxygen (mg/l)	-----	-----	-----	Total Maximum Daily Load	
Total Ammonia Nitrogen (as N) (mg/l)	-----	3.0	3.0	Total Maximum Daily Load	
Total Nitrogen (lbs/day)	-----	0.26	0.26	Total Maximum Daily Load	
Total Phosphorus (lbs/day)	-----	0.11	0.11	Total Maximum Daily Load	

Flow will be measured instantaneously, while all other parameters are to be measured with grab samples. Flow and total residual chlorine will be monitored weekly, while all other parameters are to be monitored annually.

	Analyses for all parameters are to be submitted annually in MDEQ’s NetDMR system.

VIII.	BTJ STATEMENT

	It is our judgement that the foregoing limitations represent best technical judgement.