PERMIT REVIEW SUMMARY

Permit Writer:	Ryan Wigginton	Date:	May 18, 2026
Company Name:	Jackson County Port Authority Port of Pascagoula
Facility Location:	2300 Port Road
Source Number:	1280-00151
County: 		Jackson

FACILITY DESCRIPTION

Jackson County Port Authority (JCPA) – Port of Pascagoula owns and operates a marine shipping terminal.  The facility does not have an air permit, and the operations fall under SIC code 4491 and NAICS code 488320 (Marine Cargo Handling).  JCPA is proposing to conduct methyl bromide log fumigation operations for treatment of logs to be exported from the United States.  

The following operations are proposed in accordance with the USDA’s “Treatments Procedures – Methyl Bromide – Tarpaulin Fumigation” procedure.  It begins by stacking logs on an impervious surface or tarpaulin.  These logs are covered and sealed (utilizing sand snakes, water snakes, tape, etc.) beneath an engineered tarpaulin.  Once the tarp is sealed, methyl bromide is injected into the “tent” to begin fumigation.  After 250 pounds of fumigant are injected, the logs remain sealed for 24 hours.  Afterwards, the tent is aerated using fans and blowers for a minimum of 48 hours through a flexible exhaust duct.  For this project, JCPA has conservatively assumed that all fumigant introduced to the enclosure during a fumigation event is released to the atmosphere during aeration; however, the project is considered Minor NSR.

PROJECT/PERMIT ACTION DESCRIPTION

The operations being proposed at the facility include two emission points, Facility-Wide emissions (Emission Point AA-000) and the Bulk Log Fumigation Operation (Emission Point AA-001).  The maximum, uncontrolled rate of emission of methyl bromide exceeds the major source threshold of 10 tpy of individual HAP.  The facility will limit the emission of methyl bromide to below this threshold by tracking usage, utilizing Leak Detection and Repair (LDAR) procedures, and adhering to industry-standard Best Management Practices (BMPs).

Pollutant	Emission Rate (tpy)	
Methyl Bromide	9.901	
1Facility-wide limitation taken by the facility.

APPLICABLE/PROPOSED PERMIT LIMITATIONS

Emission Point	Applicable Requirement	Pollutant/ Parameter	Limitation/Standard	Monitoring/
Recordkeeping	
AA-001	11 Miss. Admin. Code Pt. 2, R. 1.3.B.	Opacity	40%	Margin of compliance is large. No monitoring proposed.	
	11 Miss. Admin. Code Pt. 2, R. 2.2.B(10).
(Major Source Avoidance Limit)	Methyl Bromide	250.0 lb/day (calendar day)
9.90 tpy (rolling 12-Month total) 	Scale weight of methyl bromide cylinders before and after use, the quantity in pounds used, start/ending times of fumigation events + LDAR requirements and BMPs	
	11 Miss. Admin. Code Pt. 2, R. 2.2.B(10).	Exhaust Stack Specifications	Stack Height: 60 ft.
Inner Diameter: 2 ft.	Maintain construction schematics for the exhaust stack	

NSPS & MACT APPLICABILITY

The facility has not proposed any operations or equipment subject to a NESHAP or NSPS standard.  Outside of the scope of MDEQ, the operations are subject to EPA’s FIFRA requirements with includes maintaining a fumigation management plan, buffer zones, and recordkeeping; as well as USDA’s APHIS treatment procedures.

PUBLIC PARTICIPATION

The 30-day public notice period began on May 20, 2026, when the notice was posted on MDEQ’s website and ends June 22, 2026.