DRAFT PERMIT REVIEW SUMMARY

Permit Writer:	Thomas Parker	Date:	January 22, 2026

Company Name:	MacroSource LLC, Greenville North

Facility Location:	1699 Harbor Front Road

Source Number:	2800-00140

County: 		Washington

FACILITY DESCRIPTION

MacroSource LLC, Greenville North (MacroSource), owns and operates an existing dry and liquid bulk fertilizer storage and handling facility (SIC Codes: 5191 – Farm Supplies and 2875 – Fertilizers, Mixing Only). The facility receives dry fertilizer by barge and trucks, through a series of conveyors, unloaders, and hoppers. The facility transfers the fertilizer to the fertilizer storage warehouse. From there, the fertilizer can be loaded to trucks for transport off site. MacroSource also operates an auger tunnel to an enclosed system equipped with conditioners consisting of a shaft that moves from side to side and spins where coatings/additives are sprayed on dry urea. These coatings/additives may contain Volatile Organic Compounds (VOCs) and/or Hazardous Air Pollutants (HAPs). The emission points for the facility are shown in the table below.

Emission Point	Description	
AA-001	Barge to Clamshell Unloader	
AA-002	Clamshell Unloader to Hopper	
AA-003	Hopper to 70-foot Conveyor	
AA-004	70-foot Conveyor to 300-foot Conveyor	
AA-005	300-foot Conveyor to 200-foot Conveyor	
AA-006	200-foot Conveyor to One-Way House Belt; One-Way House Belt to Reversing Shuttle Conveyor; Reversing Shuttle Conveyor to Storage Bins; and Storage Bins to Hopper 1, Hopper 3, and Blend Hopper	
AA-008	Blend Hopper/Bucket Elevator to Truck	
AA-009	Fertilizer Coating in Auger Tunnel	
AA-010	South Hopper to Truck Loadout	
AA-011	North Hopper to Truck Loadout	
AA-012	Drop from Truck to Truckpit Leg	
AA-013	Truckpit Leg to 200-foot Conveyor	

PROJECT/PERMIT ACTION DESCRIPTION

MacroSource has applied for the modification of their Synthetic Minor Operating Permit (SMOP) with the following modifications:

•	Increase conveyor speeds in the receiving operations for dry fertilizer from 200 tons per hour (tph) to 800 tph at certain emission points. However, the receiving operation will remain limited by the barge unloading system (Emission Points AA-001 and AA-002), which has a maximum capacity of 500 tph.

•	Emission Points AA-001 through AA-006 will be restricted to 500 tph.

•	To remain a Synthetic Minor source, the dry fertilizer throughput will be limited to 2,500,000 tons per year (tpy).

•	MacroSource is proposing to keep the Individual and Total HAP limitations even though the coating products were reformulated and no longer contain HAPs. The manufacturer of the coating products periodically changes the formulation of the coatings, which could result in coating products that do contain HAPs in the future.

EMISSION SUMMARY

Facility-Wide Potential Emissions Summary
Pollutant	Potential Emissions
(tons/yr)	Allowable Emissions
(tons/yr)	
PM	122.15	-	
PM10	87.77	-	
PM2.5	59.18	-	
SO2	0.00	-	
NOX	0.00	-	
CO	0.00	-	
Total VOC	929.15	99.0	
Individual HAPs	0.00	9.0	
Total HAPs	0.00	24.0	

MacroSource will maintain Synthetic Minor status as an area source staying below the Title V thresholds by limiting VOC emissions to 99.0 tons per year (tpy), IndividualHAP emissions to 9.0 tpy, and Total HAP emissions to 24.0 tpy. The facility will also limit the throughput of dry fertilizer to 2,500,000 tpy. The permit also limits the amount of HAP/VOC content of coatings/additives used at the site. Maintaining records of each coating and/or additive containing VOCs and/or HAPs at the site, and the total gallons of each used on a monthly basis, VOC and/or HAP content of the material used, and the density of the coatings/additives will ensure compliance.

APPLICABLE/PROPOSED PERMIT LIMITATIONS

•	11 Miss. Admin. Code Pt. 2, R. 2.2.B(10).
o	VOC emissions limited to 99.0 tpy
o	Total HAP emissions limited to 24.0 tpy
o	Individual HAP emissions limited to 9.0 tpy
o	Dry Fertilizer Throughput limited to 2,500,000 tpy

•	11 Miss. Admin. Code Pt. 2, R. 2.2.B(10).
o	Coatings/Additives ≤ 20,000 gallons/yr
o	Coatings/Additives VOC content ≤ 65% by weight
o	Coatings/Additives Individual HAP content ≤ 6% by weight
o	Coatings/Additives Total HAP content ≤ 15% by weight
o	Coatings/Additives Density ≤ 15 lb/gal

•	11 Miss. Admin. Code Pt. 2, R. 1.3.F(1).
o	Particulate and ash limited by the relationship E = 4.1 × p0.67, where “E” is the emission rate in pounds per hour, and “p” is the process weight input rate in tons per hour

NSPS APPLICABILITY

No applicable New Source Performance Standards (NSPS) have been identified.

MACT APPLICABILITY

No applicable Maximum Achievable Control Technology (MACT) have been identified.

PUBLIC PARTICIPATION

The 30-day public notice period began on March 11, 2026, when the notice was posted on MDEQ’s website and ends April 10, 2026.