Title: afgafgasdgfsd
Author: Bruce Ferguson
Last saved by: Ivelina Pilgrim
Company: None

Permit Review Summary
Page

PERMIT REVIEW SUMMARY

Permit Writer:	Ivelina Pilgrim 	                                         Date: September 22, 2026

Company Name:	Shuqualak Lumber Company Inc, Planer Mill Division

Facility Location:	402 Oak Street
                                    Shuqualak, Mississippi

Source Number:	2000-00013

County: 		Noxubee

FACILITY DESCRIPTION

Shuqualak Lumber Company Inc., Planer Mill Division (“Shuqualak Lumber”) operates an existing Planer Mill which manufactures two-inch dimensional lumber from southern yellow pine lumber that is produced by Shuqualak Lumber’s sister sawmill. By-products from the planer mill include dry planer shavings and dry wood chips. The facility’s operations fall within SIC Code 2421 (Sawmills and Planing Mills, General).

The facility operates three (3) wood-fired boilers (Emission Points AA-101, AA-102 and AA-107) controlled by an electrostatic precipitator (ESP) and two (2) natural gas-fired boilers (AA-111 and AA-113). The boilers supply steam to three (3) batch lumber drying kilns (AA-106, AA-109, and AA-110). Dry lumber is finished in the planer mill, and two (2) cyclones (AA-203 and AA-204) are used for material transfer. 

PROJECT/PERMIT ACTION DESCRIPTION

On February 2, 2024, the MDEQ received an application for the construction of one (1) continuous steam-heated lumber drying kiln (AA-114). The proposed kiln will replace two (2) steam-heated batch lumber kilns (AA-104 and AA-105) which caught fire and burned down in December 2022. Additional information and calculations were received on March 8, 2024, September 12, 2024, January 28, 2025, January 29, 2025, April 9, 2025, and April 15, 2026. 

EMISSION SUMMARY

Shuqualak Lumber employed a hybrid Prevention of Significant Deterioration (PSD) applicability test to determine the overall project-related emissions increases that combines the “actual-to-potential” test for new sources [i.e. proposed continuous lumber drying kiln] and the “actual-to-projected actual” test for existing sources [i.e. batch lumber drying kilns, boilers, and planer cyclones].  As part of the actual-to-projected actual test applied to the batch lumber drying kilns, the facility proposed excluding a portion of emissions that the units “could have accommodated” during the consecutive 24-month baseline period [as allowed by 40 CFR 52.21(b)(41)(ii)(c)].  The could have accommodated emissions are unrelated to the proposed project, occurred at a rate in which no applicable limitations were exceeded, and occurred under operating conditions that could be sustained over an acceptable period of time. 

The net emission increases for nitrogen oxides (NO_x), volatile organic compounds (VOCs), and carbon monoxide (CO) are at least fifty percent (50%) of the applicable significant emission rate threshold. Under the “Reasonable Possibility Rule” [40 CFR 52.21(r)(6)(vi)], the facility will be required to calculate and maintain the annual emission (based on a 12-month calendar year basis) of these pollutants from all sources affected by the proposed project for a period of five (5) years after completing construction.

            Table 1. PSD Applicability 

Pollutant

Project-Related Net Increases^1
(TPY)

Significant Emission Rate
(TPY)

PM | 2.13 | 25
PM_10 | 3.02 | 15
PM_2.5 | 4.45 | 10
NO_X | 39.72 | 40
SO_2 | 2.61 | 40
VOC | 39.07 | 40
CO | 61.02 | 100
       
       ^1 Based on the addition of the proposed continuous kiln (AA-114), removal of two batch kilns (AA-104 and AA-105), increased steam demand from the existing boilers (AA-101, AA-102, AA-107, AA-111 and AA-113), removal of a wood-fired boiler (AA-108), and increased utilization of the existing planer cyclones (AA-203 and AA-204). 

APPLICABLE/PROPOSED PERMIT LIMITATIONS

Shuqualak Lumber has proposed limiting the total emission of VOCs from all lumber drying kilns (AA-106, AA-109, AA-110 and AA-114) to no more than 350.92 tons per year (tpy) based on a rolling 12-month total. To demonstrate compliance with this limit, the facility will restrict the total lumber throughput from all kilns to 171,600 thousand board-feet (MBF) per year based on a rolling 12-month total. In order for the facility to remain below the PSD threshold for NO_x, the facility has proposed limiting the total natural gas throughput in both boilers (AA-111 and AA-113) to 320 million standard cubic feet (MMscf) per year based on a rolling 12-month total.

NSPS APPLICABILITY

The proposed lumber drying kiln (AA-114) is not affected by any NSPS regulations. 

MACT APPLICABILITY

40 CFR Part 63, Subpart DDDD - National Emission Standards for Hazardous Air Pollutants for Plywood and Composite Wood Products

This subpart regulates plywood and composite wood products manufacturing facilities, including facilities manufacturing kiln-dried lumber, located at a major source of hazardous air pollutant (HAP) emissions. The facility’s lumber kilns (AA-106, AA-109, AA-110 and AA-114) are affected sources per 40 CFR 63.2231(a). The subpart was amended on July 6, 2026 and the lumber kilns are subject to work practice standard requirements. The facility must minimize lumber over-drying by developing a lumber kiln operation and maintenance plan, maintaining a dry bulb temperature below the applicable limit and/or maintaining a lumber moisture content above a required minimum. The existing kilns (AA-106, AA-109 and AA-110) must comply with the new work practice standards by July 6, 2029 while the new kiln (AA-114) must comply with these standards by July 6, 2026. 

PUBLIC PARTICIPATION

The 30-day public notice period began on September 23, 2026 with the publication of a notice on MDEQ’s website at https://opcgis.deq.state.ms.us/ensearchonline/epd-permits-at-public-notice.aspx and ends October 23, 2026.

2011 PER20240001