PERMIT REVIEW SUMMARY

Permit Writer:	Clinton Gentry 				Date:	March 20, 2026

Company Name:	Sunshine Mills Inc

Facility Location:	2103 South Gloster Street
Tupelo, MS (38802)

			34° 12’ 48.28” N
			88° 43’ 8.22” W

Source Number:	1540-00027

County: 		Lee

FACILITY DESCRIPTION

Sunshine Mills Inc is an animal feed production facility categorized under SIC Code 2048 located in Tupelo, MS. The facility’s primary function is the production of thirty to forty different types of dog food. 

The facility begins with the intake of various raw materials such as; corn, wheat, soybean meal, meat meal, rice bran, whole grain rice, and various vegetable/pulse products. These raw materials are stored in grain silos on site and are transferred, as needed, to one of the seven hammermills to be ground to a consistency driven by the type of produce to be produced. Certain products are then sent to regrinding operations to achieve an even finer consistency. Raw materials are then transferred to mixing bins to be cooked, extruded, and dried before receiving a final coating. Products are then sorted and bagged before transferring offsite. The following tables includes the emission points currently permitted at the facility.

Emission
Point	Description	
AA-001	10.045 MMBtu/hr Cleaver Brooks Natural Gas Fired Boiler	
AA-002	8.625 MMBtu/hr Superior Natural Gas Fired Boiler	
AA-003	8.5 MMBtu/hr Aeroglide Dryer with Cyclone	
AA-004	8.5 MMBtu/hr Aeroglide Dryer with Cyclone	
AA-005	8.5 MMBtu/hr Aeroglide Dryer with Cyclone	
AA-006	7.4 MMBtu/hr Grain Dryer with Cyclone	
AA-007	Grinding Operations (Corn Air Lift Filter with Baghouse)	
AA-008	Grinding Operations (Wheat Air Lift Filter with Baghouse)	
AA-009	Regrinder #1 with Baghouse (Shares back-up Cyclone with AA-010)	
AA-010	Regrinder #2 with Baghouse (Shares back-up Cyclone with AA-009)	
AA-011	Regrinder #3 with Baghouse	
AA-014	Sprout Take Away Fan #1 with Cyclone	
AA-015	Regrinder #4 with Baghouse 	
AA-016	Dust Collection from Head Sections with Baghouse	
AA-017	Pneumatic Conveying System (Equipped with two Cyclones)	
AA-018	Vac System Grain Elevator with Baghouse	
AA-019	Bin Vents off Regrinder #4 with Baghouse	
AA-020	Sprout Take Away Fan #2 with Cyclone	
AA-021	Sprout Take Away Fan #3 with Cyclone	
AA-022	Regrinder # 5 with Baghouse	
AA-023	Seasonal Bin Vents 	
AA-024	1,000 Gallon Diesel Storage Tank	
AA-025	500 Gallon Gasoline Storage Tank	

PROJECT/PERMIT ACTION DESCRIPTION

Sunshine Mills has applied for a modification to their Synthetic Minor Operating Permit that was issued on February 3, 2025. The facility requests that Emission Point AA-012, which was removed during the SMOP reissuance permitting action, be added back into the permit. The facility states that the removal of Emission Point AA-012 from the permit was a mistake made between the facility, and MDEQ. 

Emission Point AA-012 is the primary source of truck unloading into the facility. Therefore, the emission point cannot be removed for the facility to be functional, as other intake options are not available. Sunshine Mill states that the mistake occurred due to the control device associated with the emission point (a baghouse) being replaced with an enclosed building fitted with a new, higher control baghouse. This resulted in a miscommunication where the entire emission point was removed. The permitting limits requiring the associated control device for Emission Point AA-012 to be operational, as well as stack testing requirements to determine the control efficiency of the baghouse, are being reimplemented with this modification.  

EMISSION SUMMARY

Criteria Pollutant	Maximum  Uncontrolled	Potential Controlled	Title V Threshold	
Carbon Monoxide (CO)	18.97	18.97	100	
Nitrogen Oxides (NOx)	22.59	22.59	100	
Sulfur Dioxide (SO2)	0.14	0.14	100	
Particulate Matter 10 (PM10)	15,790	99.00	100	
Volatile Organic Compounds (VOC)	1.27	1.27	100	
Total Hazardous Air Pollutants (HAP)	0.43	0.43	25	
*All emissions are expressed in units of tons per year (tpy)

As shown in the table above, Sunshine Mills has the potential to exceed the Title V threshold of 100 tpy for PM10 emissions. In order to qualify as a synthetic minor source and avoid Title V and PSD, Sunshine Mills has elected to take an emissions limitation of 99.0 tpy per rolling 12-months for PM10. Sunshine Mills will make monthly throughput calculations, which will be based off of emissions factors determined via stack tests of each controlled, emission point. The facility will also limit their throughput to 500 tons per day, or 182,500 tpy. Along with visible emissions evaluations, all of this will help ensure that Sunshine does not exceed their PM10 emissions.

APPLICABLE/PROPOSED PERMIT LIMITATIONS

No new permitting limitations are being proposed with this modification.

NSPS APPLICABILITY

40 CFR 60 Subpart Dc – Standards of Performance for Small Industrial-Commercial-Institutional Steam Generating Units
This subpart applies to steam generating units for which construction, modification, or reconstruction is commenced after June 9, 1989 and that has a maximum design heat input capacity of 29 megawatts (or 100 MMBtu/hr) or less, but greater than or equal to 2.9 MW (or 10 MMBtu/hr). Emission Point AA-001 is natural gas fired boiler with a rated capacity of 10.045 MMBtu/hr and as such, is subject to this subpart. However, since the unit only burns natural gas, there are no applicable SO2 or PM emissions standards for this unit under Subpart Dc. 

40 CFR 60 Subpart Kb – Standards of Performance for Volatile Organic Liquid Storage Vessels (Including Petroleum Liquid Storage Vessels) for Which Construction, Reconstruction, or Modification Commenced After July 23, 1984. 
This subpart applies to storage vessels with a capacity greater than or equal to 75 cubic meters (or 19,182.9 gallons) this is used to store volatile organic liquids (VOL) for which construction, reconstruction, or modification is commenced after July 23, 1984. All VOL storage vessels at this facility have capacities less than or equal to 1,000 gallons. Therefore, this facility is not subject to this subpart. 

MACT APPLICABILITY
Due to this facility’s HAP emissions being below the Title V thresholds of 25 tpy for all HAPs and 10 tpy for any individual HAP, this facility is categorized as an area source of HAP emissions.

40 CFR 63 Subpart JJJJJJ – National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers Area Sources
This subpart applies to owners and operators of industrial, commercial, or institutional boilers that are located at an area source of HAPs. This facility is categorized as an area source of HAPs and as such, it is potentially subject to this subpart. However, as defined under 40 CFR 63.11195(e), any “gas-fired boiler” is exempt from this subpart. Due to all boilers at this facility combusting only natural gas, this facility is not subject to this subpart. 

40 CFR 63 Subpart DDDDDDD – National Emission Standards for Hazardous Air Pollutants for Area Sources: Prepared Feeds Manufacturing. 
This subpart applies to owners and operators of prepared feeds manufacturing facilities that use a material containing chromium or a material containing manganese and is an area source of HAPs. Sunshine Mills does not use any materials containing chromium or manganese and as such, is not subject to this subpart. 

PUBLIC PARTICIPATION

The 30-day public notice period began on April 15, 2026, when the notice was posted on MDEQ’s website and ends May 15, 2026.