Draft Air Individual Permit State Permit

Transcription

1 Draft Air Individual Permit State Permit Permittee: Facility name: Central Boiler Inc Central Boiler Inc th St Greenbush, MN Roseau County Expiration date: Non-Expiring Permit State Permit: [Amendment Issue Date] Permit characteristics: State; Nonmajor for Part 70/ True minor for NSR The emission units, control equipment and emission stacks at the stationary source authorized in this permit are as described in the submittals listed in the Permit Applications Table. This permit reissuance supersedes Air Emission Permit No and authorizes the Permittee to operate the stationary source at the address listed above unless otherwise noted in the permit. The Permittee must comply with all the conditions of the permit. Any changes or modifications to the stationary source must be performed in compliance with Minn. R to Terms used in the permit are as defined in the state air pollution control rules unless the term is explicitly defined in the permit. Unless otherwise indicated, all the Minnesota rules cited as the origin of the permit terms are incorporated into the SIP under 40 CFR and as such are enforceable by U.S. Environmental Protection Agency (EPA) Administrator or citizens under the Clean Air Act. Signature: [ ] for This document has been electronically signed. Don Smith, P.E., Manager Air Quality Permits Section Industrial Division for the Minnesota Pollution Control Agency

2 Table of Contents 1. Permit applications table Where to send submittals Facility description Summary of subject items Limits and other requirements Submittal/action requirements Appendices Appendix A. Insignificant Activities and General Applicable Requirements Appendix B: 40 CFR pt. 63, Subpart XXXXXX Appendix C: Maximum Materials Contents and Application Rates Page

3 Permit issued: [month day, year] Permit expires: [month day, year] Page 3 of Permit applications table Subsequent permit applications: Title description Application receipt date Action number State Permit 08/24/2016, with supplemental information received on 5/21/2018 and 6/4/

4 Permit issued: [month day, year] Permit expires: [month day, year] Page 4 of Where to send submittals Send submittals that are required to be submitted to the EPA regional office to: Chief Air Enforcement Air and Radiation Branch EPA Region V 77 West Jackson Boulevard Chicago, Illinois Each submittal must be postmarked or received by the date specified in the applicable Table. Those submittals required by Minn. R to must be certified by a responsible official, defined in Minn. R , subp. 21. Other submittals shall be certified as appropriate if certification is required by an applicable rule or permit condition. Send submittals that are required by the Acid Rain Program to: U.S. Environmental Protection Agency Clean Air Markets Division 1200 Pennsylvania Avenue NW (6204N) Washington, D.C Send any application for a permit or permit amendment to: Fiscal Services 6 th Floor Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota Also, where required by an applicable rule or permit condition, send to the Permit Document Coordinator notices of: a. Accumulated insignificant activities b. Installation of control equipment c. Replacement of an emissions unit, and d. Changes that contravene a permit term Unless another person is identified in the applicable Table, send all other submittals to: AQ Compliance Tracking Coordinator Industrial Division Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota Or a signed and scanned PDF copy to: submitstacktest.pca@state.mn.us (for submittals related to stack testing) AQRoutineReport.PCA@state.mn.us (for other compliance submittals) (See complete instructions in Routine Air Report Instructions Letter at

5 Permit issued: [month day, year] Permit expires: [month day, year] Page 5 of Facility description The Central Boiler Inc (Facility) is located at th Street in Greenbush, Roseau County, Minnesota. Central Boiler manufactures outdoor wood and coal furnaces and gasoline lawn mowers at its manufacturing facility in Greenbush, Minnesota. The furnaces are primarily used by residential customers to heat and provide hot water to buildings. The zero-steer lawn mowers are manufactured under the brand name Altoz. Emission sources from the facility include metal fabrication, spray foam, liquid paint, powder paint booths and a cure oven, a metal parts washer, a non-emergency generator, research and development, maintenance, and small combustion sources. The main pollutants from this facility are particulate matter, volatile organic compounds (VOCs), and hazardous air pollutants (HAPs) from painting operations.

6 Permit issued: [month day, year] Permit expires: [month day, year] Page 6 of Summary of subject items SI ID: Description TFAC 2: Central Boiler Inc ACTV 4: All IAs EQUI 1: Liquid Paint Spray Booth - Spray Booth/Coating EQUI 1: Liquid Paint Spray Booth - Spray Booth/Coating EQUI 1: Liquid Paint Spray Booth - Spray Booth/Coating EQUI 2: Metal Parts Water-Wash System Dryer - Dryer/Oven, unknown firing method EQUI 3: Powder Paint Cure Oven - Dryer/Oven, unknown firing method EQUI 3: Powder Paint Cure Oven - Dryer/Oven, unknown firing method EQUI 5: R&D Wood Furnace Location 4 (Test Cell) - Furnace EQUI 6: R&D Wood Furnace Location 6 (Outdoor East) - Furnace EQUI 7: R&D Wood Furnace Location 7 (Outdoor East) - Furnace EQUI 9: Non-Emergency Generator - Reciprocating IC Engine EQUI 10: Air Make-up Unit #1 - Other Combustion EQUI 11: Air Make-up Unit #2 - Other Combustion EQUI 12: Air Make-up Unit #3 - Other Combustion EQUI 13: Air Make-up Relationshi p Type sends to sends to is controlled by sends to Related SI ID: Description STRU 2: Liquid Paint Spray Booth Stack 1 STRU 3: Liquid Paint Spray Booth Stack 2 TREA 1: Mat or Panel Filter STRU 4: Metal Parts Water- Wash System Dryer sends to STRU 5: Powder Paint Cure Oven Stack 1 sends to STRU 6: Powder Paint Cure Oven Stack 2 sends to sends to sends to sends to STRU 8: R&D Wood Furnace Location 4 (Test Cell) STRU 9: R&D Wood Furnace Location 6 (Outdoor East) STRU 10: R&D Wood Furnace Location 7 (Outdoor East) STRU 1: Non- Emergency Generator SI ID: Description Unit #4 - Other Combustion EQUI 14: Air Make-up Unit #5 - Other Combustion EQUI 19: R&D Wood Furnace Location 14 (Outdoor East) EQUI 20: R&D Wood Furnace Location 15 (Test Hood) EQUI 21: R&D Wood Furnace Location 16 (Test Hood) EQUI 24: R&D Coal Furnace Location 1 (Outdoor East) EQUI 25: Powder Paint Booth 1 EQUI 26: Powder Paint Booth 2 EQUI 27: Powder Paint Booth Manual STRU 1: Non-Emergency Generator STRU 2: Liquid Paint Spray Booth Stack 1 STRU 3: Liquid Paint Spray Booth Stack 2 STRU 4: Metal Parts Water-Wash System Dryer STRU 5: Powder Paint Cure Oven Stack 1 STRU 6: Powder Paint Cure Oven Stack 2 STRU 8: R&D Wood Furnace Location 4 (Test Cell) STRU 9: R&D Wood Furnace Location 6 (Outdoor East) STRU 10: R&D Wood Furnace Location 7 (Outdoor East) Relationshi p Type sends to sends to sends to sends to Related SI ID: Description STRU 13: R&D Wood Furnace Location 14 (Outdoor East) STRU 14: R&D Wood Furnace Location 15 (Test Hood) STRU 15: R&D Wood Furnace Location 16 (Test Hood) STRU 18: R&D Coal Furnace Location 1 (Outdoor East)

7 Permit Expires: [month day, year] Page 7 of 33 SI ID: Description STRU 12: Manufacturing Building STRU 13: R&D Wood Furnace Location 14 (Outdoor East) STRU 14: R&D Wood Furnace Location 15 (Test Hood) STRU 15: R&D Wood Relationshi p Type Related SI ID: Description SI ID: Description Furnace Location 16 (Test Hood) STRU 18: R&D Coal Furnace Location 1 (Outdoor East) TREA 1: Mat or Panel Filter Relationshi p Type Related SI ID: Description

8 Permit Expires: [month day, year] Page 8 of Limits and other requirements Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation TFAC Central Boiler Inc Permit Appendices: This permit contains appendices as listed in the permit Table of Contents. The Permittee shall comply with all requirements contained in the appendices. [Minn. R , subp. 2] PERMIT SHIELD: Subject to the limitations in Minn. R , compliance with the conditions of this permit shall be deemed compliance with the specific provision of the applicable requirement identified in the permit as the basis of each condition. Subject to the limitations of Minn. R and , subp. 2, notwithstanding the conditions of this permit specifying compliance practices for applicable requirements, any person (including the Permittee) may also use other credible evidence to establish compliance or noncompliance with applicable requirements. This permit shall not alter or affect the liability of the Permittee for any violation of applicable requirements prior to or at the time of permit issuance. [Minn. R (A)(2)] Circumvention: Do not install or use a device or means that conceals or dilutes emissions, which would otherwise violate a federal or state air pollution control rule, without reducing the total amount of pollutant emitted. [Minn. R ] Air Pollution Control Equipment: Operate all pollution control equipment whenever the corresponding process equipment and emission units are operated. [Minn. R , subp. 16(J), Minn. R , subp. 2] Operation and Maintenance Plan: Retain at the stationary source an operation and maintenance plan for all air pollution control equipment. At a minimum, the O & M plan shall identify all air pollution control equipment and control practices and shall include a preventative maintenance program for the equipment and practices, a description of (the minimum but not necessarily the only) corrective actions to be taken to restore the equipment and practices to proper operation to meet applicable permit conditions, a description of the employee training program for proper operation and maintenance of the control equipment and practices, and the records kept to demonstrate plan implementation. [Minn. R , subp. 14, Minn. R , subp. 16(J)] Operation Changes: In any shutdown, breakdown, or deviation the Permittee shall immediately take all practical steps to modify operations to reduce the emission of any regulated air pollutant. The Commissioner may require feasible and practical modifications in the operation to reduce emissions of air pollutants. No emissions units that have an unreasonable shutdown or breakdown frequency of process or control equipment shall be permitted to operate. [Minn. R , subp. 4]

9 Permit Expires: [month day, year] Page 9 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation Fugitive Emissions: Do not cause or permit the handling, use, transporting, or storage of any material in a manner which may allow avoidable amounts of particulate matter to become airborne. Comply with all other requirements listed in Minn. R [Minn. R ] Noise: The Permittee shall comply with the noise standards set forth in Minn. R to at all times during the operation of any emission units. This is a state only requirement and is not enforceable by the EPA Administrator or citizens under the Clean Air Act. [Minn. R ] Inspections: The Permittee shall comply with the inspection procedures and requirements as found in Minn. R , subp. 9(A). [Minn. R , subp. 9(A)] The Permittee shall comply with the General Conditions listed in Minn. R , subp. 16. [Minn. R , subp. 16] Monitoring Equipment Calibration - The Permittee shall either: 1. Calibrate or replace required monitoring equipment every 12 months; or 2. Calibrate at the frequency stated in the manufacturer's specifications. For each monitor, the Permittee shall maintain a record of all calibrations, including the date conducted, and any corrective action that resulted. The Permittee shall include the calibration frequencies, procedures, and manufacturer's specifications (if applicable) in the Operations and Maintenance Plan. Any requirements applying to continuous emission monitors are listed separately in this permit. [Minn. R , subp. 4(D)] Operation of Monitoring Equipment: Unless noted elsewhere in this permit, monitoring a process or control equipment connected to that process is not necessary during periods when the process is shutdown, or during checks of the monitoring systems, such as calibration checks and zero and span adjustments. If monitoring records are required, they should reflect any such periods of process shutdown or checks of the monitoring system. [Minn. R , subp. 4(D)] Recordkeeping: Retain all records at the stationary source, unless otherwise specified within this permit, for a period of five (5) years from the date of monitoring, sample, measurement, or report. Records which must be retained at this location include all calibration and maintenance records, all original recordings for continuous monitoring instrumentation, and copies of all reports required by the permit. Records must conform to the requirements listed in Minn. R , subp. 5(A). [Minn. R , subp. 5(C)] Recordkeeping: Maintain records describing any insignificant modifications (as required by Minn. R , subp. 3) or changes contravening permit terms (as required by Minn. R , subp. 2), including records of the emissions resulting from those changes. [Minn. R , subp. 5(B)]

10 Permit Expires: [month day, year] Page 10 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation If the Permittee determines that no permit amendment or notification is required prior to making a change, the Permittee must retain records of all calculations required under Minn. R For non-expiring permits, these records shall be kept for a period of five years from the date that the change was made. The records shall be kept at the stationary source for the current calendar year of operation and may be kept at the stationary source or office of the stationary source for all other years. The records may be maintained in either electronic or paper format. [Minn. R , subp. 4] Shutdown Notifications: Notify the Commissioner at least 24 hours in advance of a planned shutdown of any control equipment or process equipment if the shutdown would cause any increase in the emissions of any regulated air pollutant. If the owner or operator does not have advance knowledge of the shutdown, notification shall be made to the Commissioner as soon as possible after the shutdown. However, notification is not required in the circumstances outlined in Items A, B and C of Minn. R , subp. 3. At the time of notification, the owner or operator shall inform the Commissioner of the cause of the shutdown and the estimated duration. The owner or operator shall notify the Commissioner when the shutdown is over. [Minn. R , subp. 3] Breakdown Notifications: Notify the Commissioner within 24 hours of a breakdown of more than one hour duration of any control equipment or process equipment if the breakdown causes any increase in the emissions of any regulated air pollutant. The 24- hour time period starts when the breakdown was discovered or reasonably should have been discovered by the owner or operator. However, notification is not required in the circumstances outlined in Items A, B and C of Minn. R , subp. 2. At the time of notification or as soon as possible thereafter, the owner or operator shall inform the Commissioner of the cause of the breakdown and the estimated duration. The owner or operator shall notify the Commissioner when the breakdown is over. [Minn. R , subp. 2] Notification of Deviations Endangering Human Health or the Environment: As soon as possible after discovery, notify the Commissioner or the state duty officer, either orally or by facsimile, of any deviation from permit conditions which could endanger human health or the environment. [Minn. R , subp. 1] Notification of Deviations Endangering Human Health or the Environment Report: Within 2 working days of discovery, notify the Commissioner in writing of any deviation from permit conditions which could endanger human health or the environment. Include the following information in this written description: 1. the cause of the deviation; 2. the exact dates of the period of the deviation, if the deviation has

11 Permit Expires: [month day, year] Page 11 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation been corrected; 3. whether or not the deviation has been corrected; 4. the anticipated time by which the deviation is expected to be corrected, if not yet corrected; and 5. steps taken or planned to reduce, eliminate, and prevent reoccurrence of the deviation. [Minn. R , subp. 1] Application for Permit Amendment: If a permit amendment is needed, submit an application in accordance with the requirements of Minn. R through Minn. R Submittal dates vary, depending on the type of amendment needed. Upon adoption of a new or amended federal applicable requirement, and if there are 3 or more years remaining in the permit term, the Permittee shall file an application for an amendment within nine months of promulgation of the applicable requirement, pursuant to Minn. R , subp. 3. [Minn. R , subp. 3, Minn. R ] Extension Requests: The Permittee may apply for an Administrative Amendment to extend a deadline in a permit by no more than 120 days, provided the proposed deadline extension meets the requirements of Minn. R , subp. 1(H). Performance testing deadlines from the General Provisions of 40 CFR pt. 60 and pt. 63 are examples of deadlines for which the MPCA does not have authority to grant extensions and therefore do not meet the requirements of Minn. R , subp. 1(H). [Minn. R , subp. 1(H)] Emission Inventory Report: due on or before April 1 of each calendar year following permit issuance. Submit in a format specified by the Commissioner. [Minn. R ] Emission Fees: due 30 days after receipt of an MPCA bill. [Minn. R ] The Permittee shall not have engines that meet Subparagraph (1)(iii) under the definition of Nonroad Engine at in one location within the stationary source for more than 12 consecutive months. A location is any single site at a building, structure, facility, or installation. Any engine, or engines, that replaces an engine at a location and that is intended to perform the same or similar function as the engine it replaced will be included in calculating the consecutive time period. [40 CFR ] For a nonroad engine that is excluded from any requirements of 40 CFR Part 1068 because it is a stationary engine, the Permittee may not move it or install it in any mobile equipment, except as allowed by the provisions of 40 CFR Part The Permittee may not circumvent or attempt to circumvent the residence-time requirements of Subparagraph (2)(iii) of the Nonroad Engine definition at [40 CFR (b)(3)] The Permittee shall conduct an inventory of all engines on-site that meet Subparagraph (1)(iii) under the definition of Nonroad Engine

12 Permit Expires: [month day, year] Page 12 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation at , once each calendar quarter; inventories shall not take place in consecutive months. This applies to nonroad engines that are owned by the Permittee, or rented and operated by the Permittee, or brought onsite and operated by a vendor or contractor. The inventory shall include the following: 1) Date that the nonroad engine is inventoried. 2) Identification number. 3) Function of the nonroad engine (e.g. compressor, welder). 4) Location of the engine within the stationary source. 5) Statement that the nonroad engine has not been located in a single location for 12 consecutive months, and movement between locations has not been for purposes of circumvention of residence time requirements of Subparagraph (2)(iii) under the definition of Nonroad Engine at [40 CFR (nonrd engn)(1)(iii), Minn. R , subps. 4-5] A nonroad engine ceases to be a nonroad engine and becomes a new stationary engine if: 1. At any time, it meets the criteria specified in Subparagraph (2)(iii) under the definition of Nonroad Engine in For example, a portable generator engine ceases to be a nonroad engine if it is used or will be used in a single specific location for 12 months or longer. If the Administrator or the Permitting authority determines that an engine will be or has been used in a single specific location for 12 months or longer, it ceased to be a nonroad engine when it was placed in that location. OR 2. It is otherwise regulated by a federal New Source Performance Standard promulgated under section 111 of the Clean Air Act (42 U.S.C. 7411). [40 CFR (e)] EQUI 1 EU001 Liquid Paint Spray Booth - Spray Booth/Coating The Permittee shall limit emissions of HAPs - Single <= 8.5 tons per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12-month period. [Title I Condition: Avoid major source under 40 CFR 63.2] The Permittee shall limit emissions of HAPs - Total <= 20.7 tons per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12-month period. [Title I Condition: Avoid major source under 40 CFR 63.2] The Permittee shall limit emissions of Volatile Organic Compounds <= 75 tons per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12-month period as described later in this permit. VOC contents for each VOC-containing material shall be determined

13 Permit Expires: [month day, year] Page 13 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation as described under the Material Content requirement for EQUI 1. The calculation of VOCs used may take into account recovered/recycled VOCs as described under the Waste Credit requirement for EQUI 1. [To avoid major source under 40 CFR 70.2 & Minn. R ] Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R or Minn. R [Minn. R , subp. 1(A)] Opacity <= 20 percent opacity. [Minn. R , subp. 1(B)] The Permittee shall vent emissions from EQUI 1 to control equipment meeting the requirements of TREA 1 whenever EQUI 1 operates. [Minn. R , subp. 14, Minn. R , subp. 2] Material Content. VOC, HAPs, and Solids (PM, PM<10 microns, and PM<2.5 microns) contents in coating materials shall be determined by the Safety Data Sheet (SDS) or the Material Safety Data Sheet (MSDS) provided by the supplier for each material used. If a material content range is given on the SDS or the MSDS, the highest number in the range shall be used in all compliance calculations. If information is provided in the Regulatory Section of the SDS, the highest number in the range of that section may be used. Other alternative methods approved by the MPCA may be used to determine the VOC, HAPs, and solids contents. The Commissioner reserves the right to require the Permittee to determine the VOC, HAP, and solids contents of any material, according to EPA or ASTM reference methods. If an EPA or ASTM reference method is used for material content determination, the data obtained shall supersede the SDS or the MSDS. [Minn. R , subps. 4-5] Waste Credit: If the Permittee elects to obtain credit for HAPs, solids, and/or VOC shipped in waste materials, the Permittee shall either use item 1 or 2 to determine the VOC, solids, and/or total and individual HAP content for each credited shipment. 1) The Permittee shall analyze a composite sample of each waste shipment to determine the weight content of VOC, solids, total HAP, and each individual HAP, excluding water. 2) The Permittee may use supplier data for raw materials to determine the VOC, solids, and total and individual HAP contents of each waste shipment, using the same content data used to determine the content of raw materials. If the waste contains several materials, the content of mixed waste shall be assumed to be the lowest VOC, solids, and total and individual HAP content of any of the materials. [Minn. R , subps. 4-5] Maximum Contents of Materials: The Permittee assumed certain worst-case contents of materials when determining the short term potential to emit of this unit. These assumptions are listed in Appendix C of this permit. Changing to a material that has a higher content of any of the given pollutants is considered a change in method of operation that must be evaluated under Minn. R , subp. 3 to determine if a permit amendment or

14 Permit Expires: [month day, year] Page 14 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation notification is required under Minn. R [Minn. R , subp. 35a] Daily Recordkeeping. On each day of operation, the Permittee shall calculate, record, and maintain a record of the total quantity of each coating and other VOC and HAP-containing materials used at the facility. This shall be based on written usage logs, flow meters, and delivery records. [Minn. R , subps. 4-5] HAPs: Monthly Recordkeeping. By the 15th of the month, the Permittee shall calculate and record the following using the formulas specified in this permit: 1) The total of each HAP-containing material used in the previous calendar month using the daily usage records. This record shall also include the individual and total HAP contents of each HAPcontaining material used in the previous month, as determined by the Material Content requirement of this permit; 2) The total and individual HAP emissions for the previous month using the formulas specified in this permit; and 3) The 12-month rolling sum total and individual HAP emissions for the previous 12-month period by summing the monthly emissions data for the previous 12 months. [Minn. R , subps. 4-5] HAPs: Monthly Calculation -- HAP Emissions. The Permittee shall calculate each individual HAP and total HAP emissions using the following equations: HAP Emissions (tons/month) = H - W H = (A1 x B1) + (A2 x B2) + (A3 x B3) +... W = (C1 x D1) + (C2 x D2) + (C3 x D3) +... Where: H = the amount of each pollutant (either total HAP or each individual HAP), used, in tons/month. A# = Amount of each HAP-containing material used in the previous month, in tons/month. B# = weight percent of each individual or total HAP in A#, as a fraction (e.g., 50% is 0.50). W = the amount of each pollutant (either total HAP or each individual HAP) shipped in waste, in tons/month. C# = amount, in tons/month, of each HAP-containing waste material shipped. D# = weight percent of each individual or total HAP in C#, as a fraction. [Minn. R , subps. 4-5] Volatile Organic Compounds: Monthly Recordkeeping. By the 15th of the month, the Permittee shall calculate and record the following: 1) The total usage of VOC-containing materials for the previous calendar month using the daily usage records. This record shall also include the VOC and solids contents of each material as determined by the Material Content requirement of this permit; 2) The VOC emissions for the previous month using the formulas specified in this permit; and 3) The 12-month rolling sum VOC emissions for the previous 12- month period by summing the monthly VOC emissions data for the previous 12 months. [Minn. R , subps. 4-5]

15 Permit Expires: [month day, year] Page 15 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation Volatile Organic Compounds: Monthly Calculations. The Permittee shall calculate VOC emissions using the following equations: VOC (tons/month) = V - W V = (A1 x B1) + (A2 x B2) + (A3 x B3) +... W = (C1 x D1) + (C2 x D2) + (C3 x D3) +... where: V = total VOC used in tons/month; A# = amount of each VOC-containing material used, in tons/month; B# = weight percent VOC in A#, as a fraction; W = the amount of VOC shipped in waste, in tons/month; C# = amount, in tons/month, of each VOC-containing waste material shipped. If the Permittee chooses to not take credit for waste shipments, this parameter would be zero; and D# = weight percent of VOC in C#, as a fraction. [Minn. R , subps. 4-5] All doors and windows at the booth leading to the outside shall be kept closed when the painting equipment is in operation. Failure to do so must be reported as a deviation. [Minn. R , 2, 5] Signage and Inspection of Booth Openings: The Permittee shall post signs on all non-alarmed doors and windows leading to the outside from the paint booth that state that the doors and windows must remain closed while the paint booth is in use. The Permittee shall conduct inspections at least once each calendar week, while the paint booth is in use, to determine if the doors and windows are closed as required by this permit. The Permittee shall maintain a written record of the inspections and any corrective action taken. [Minn. R , subps. 4-5] EQUI 2 EU002 Metal Parts Water-Wash System Dryer - Dryer/Oven, unknown firing method Fuel Usage: Propane only (by design) [Minn. R , subp. 35a, Minn. R , subp. 2] Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R or Minn. R This unit is in compliance with this requirement because the PTE is gr/dscf. [Minn. R , subp. 1(A)(1)] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 1(A)(2)] EQUI 3 EU003 Powder Paint Cure Oven -

16 Permit Expires: [month day, year] Page 16 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation Dryer/Oven, unknown firing method Fuel Usage: Propane only (by design) [Minn. R , subp. 35a, Minn. R , subp. 2] Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R or Minn. R This unit is in compliance with this requirement because the PTE is gr/dscf. [Minn. R , subp. 1(A)(1)] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 1(A)(2)] EQUI 5 EU005 R&D Wood Furnace Location 4 (Test Cell) - Furnace Fuel Usage: Dry Wood only (by design). All wood fuel shall meet the description of wood in the definition of Clean Cellulosic Biomass at 40 CFR [Minn. R , subp. 35a] Particulate Matter <= 0.40 pounds per million Btu heat input. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 6 EU006 R&D Wood Furnace Location 6 (Outdoor East) - Furnace Fuel Usage: Dry Wood only (by design). All wood fuel shall meet the description of wood in the definition of Clean Cellulosic Biomass at 40 CFR [Minn. R , subp. 35a] Particulate Matter <= 0.40 pounds per million Btu heat input. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 7 EU007 R&D Wood Furnace Location 7 (Outdoor East) - Furnace Fuel Usage: Dry Wood only (by design). All wood fuel shall meet the description of wood in the definition of Clean Cellulosic Biomass at

17 Permit Expires: [month day, year] Page 17 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation 40 CFR [Minn. R , subp. 35a] Particulate Matter <= 0.40 pounds per million Btu heat input. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 9 EU014 Non-Emergency Generator - Reciprocating IC Engine Fuel type: Diesel fuel only. [Minn. R , subp. 35a] Particulate Matter <= 0.20 grams per kilowatt-hour. [40 CFR (b), Minn. R ] Carbon Monoxide <= 3.5 grams per kilowatt-hour. [40 CFR (b), Minn. R ] NMHC+NOx <= 6.4 grams per kilowatt-hour. [40 CFR (b), Minn. R ] Opacity <= 20 percent opacity once operating temperatures have been attained. [Minn. R , subp. 1] Diesel fuel must meet the requirements of (b), which is subject to the following per-gallon standards: 1. Sulfur content: 15 parts per million (ppm) maximum; and 2. Cetane index or aromatic content: i. a minimum cetane index of 40, or ii. a maximum aromatic content of 35 volume percent. [40 CFR (b), Minn. R ] Sulfur Dioxide <= pounds per million Btu heat input. This limit is effective on January 31, The potential to emit from the unit is lb SO2 per MMBtu due to equipment design and allowable fuels. [Minn. R , subp. 2(B)] The Permittee must operate and maintain the engine according to the manufacturer's written instructions or procedures developed by the Permittee that are approved by the engine manufacturer, over the entire life of the engine. The Permittee may only change those settings that are permitted by the manufacturer. The Permittee must also meet the requirements of 40 CFR parts 89, 94 and/or 1068, as applicable. [40 CFR , 40 CFR (a), Minn. R ] The Permittee shall keep a maintenance plan and records of conducted maintenance and must, to the extent practicable, maintain and operate the engine in a manner consistent with good air pollution control practice for minimizing emissions. In addition, the Permittee shall conduct an initial performance test to demonstrate compliance with the applicable emission standards within 1 year of startup, or within 1 year after an engine and control device is no longer installed, configured, operated, and maintained in accordance with the manufacturer's emission-related written

18 Permit Expires: [month day, year] Page 18 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation instructions, or within 1 year after a change in emission-related settings in a way that is not permitted by the manufacturer. The Permittee shall conduct subsequent performance testing every 8,760 hours of engine operation or 3 years, whichever comes first, thereafter to demonstrate compliance with the applicable emission standards. [40 CFR (g)(3)] EQUI 9 is a new affected source as defined under 40 CFR pt. 63, subp. ZZZZ, and the facility is an area source as defined at 40 CFR Section The Permittee shall meet the requirements of 40 CFR pt. 63, subp. ZZZZ by meeting the requirements of 40 CFR pt. 60, subp. IIII. No further requirements of 40 CFR pt. 63, subp. ZZZZ apply to EQUI 9. [40 CFR (c), Minn. R ] The Permittee shall keep records of fuel type and usage on a monthly basis. [Minn. R , subp. 5] Fuel Supplier Certification: The Permittee shall obtain and maintain a fuel supplier certification for each shipment of diesel fuel oil, certifying that the sulfur content does not exceed percent by weight. [Minn. R , subps. 4-5] Hours <= 5000 hours per year 12-month rolling sum to be calculated by the 15th day of each month for the previous 12- month period as described later in this permit. [To avoid major source under 40 CFR 70.2 & Minn. R ] Daily Recordkeeping. On each day of operation, the Permittee shall calculate, record, and maintain a record of the total hours of operation. This shall be based on written logs. [To avoid major source under 40 CFR 70.2 & Minn. R ] Monthly Recordkeeping. By the 15th of the month, the Permittee shall calculate and record the following: 1) The total hours of operation for the previous calendar month using the daily records; and 2) The 12-month rolling sum hours of operation for the previous 12- month period by summing the monthly hours of operation for the previous 12 months. [Minn. R , subps. 4-5] EQUI 10 EU009 Air Make-up Unit #1 - Other Combustion Fuel Usage: Propane only (by design) [Minn. R , subp. 35a, Minn. R , subp. 2] Particulate Matter <= 0.40 pounds per million Btu heat input. The potential to emit from the unit is lb/mmbtu due to equipment design and allowable fuels. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2]

19 Permit Expires: [month day, year] Page 19 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation EQUI 11 EU010 Air Make-up Unit #2 - Other Combustion Fuel Usage: Propane only (by design) [Minn. R , subp. 35a, Minn. R , subp. 2] Particulate Matter <= 0.40 pounds per million Btu heat input. The potential to emit from the unit is lb/mmbtu due to equipment design and allowable fuels. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 12 EU011 Air Make-up Unit #3 - Other Combustion Fuel Usage: Propane only (by design) [Minn. R , subp. 35a, Minn. R , subp. 2] Particulate Matter <= 0.40 pounds per million Btu heat input. The potential to emit from the unit is lb/mmbtu due to equipment design and allowable fuels. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 13 EU012 Air Make-up Unit #4 - Other Combustion Fuel Usage: Propane only (by design) [Minn. R , subp. 35a, Minn. R , subp. 2] Particulate Matter <= 0.40 pounds per million Btu heat input. The potential to emit from the unit is lb/mmbtu due to equipment design and allowable fuels. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 14 EU013 Air Make-up Unit #5 - Other Combustion Fuel Usage: Propane only (by design) [Minn. R , subp. 35a, Minn. R , subp. 2] Particulate Matter <= 0.40 pounds per million Btu heat input. The potential to emit from the unit is lb/mmbtu due to equipment design and allowable fuels. [Minn. R , subp.

20 Permit Expires: [month day, year] Page 20 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 19 R&D Wood Furnace Location 14 (Outdoor East) Fuel Usage: Dry Wood only (by design). All wood fuel shall meet the description of wood in the definition of Clean Cellulosic Biomass at 40 CFR [Minn. R , subp. 35a] Particulate Matter <= 0.40 pounds per million Btu heat input. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 20 R&D Wood Furnace Location 15 (Test Hood) Fuel Usage: Dry Wood only (by design). All wood fuel shall meet the description of wood in the definition of Clean Cellulosic Biomass at 40 CFR [Minn. R , subp. 35a] Particulate Matter <= 0.40 pounds per million Btu heat input. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 21 R&D Wood Furnace Location 16 (Test Hood) Fuel Usage: Dry Wood only (by design). All wood fuel shall meet the description of wood in the definition of Clean Cellulosic Biomass at 40 CFR [Minn. R , subp. 35a] Particulate Matter <= 0.40 pounds per million Btu heat input. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 24 R&D Coal Furnace Location 1 (Outdoor East) Fuel Usage: Anthracite coal only (by design). [Minn. R , subp. 35a]

21 Permit Expires: [month day, year] Page 21 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation Particulate Matter <= 0.40 pounds per million Btu heat input. [Minn. R , subp. 1] Opacity <= 20 percent opacity except for one six-minute period per hour of not more than 60 percent opacity. [Minn. R , subp. 2] EQUI 25 Powder Paint Booth Opacity <= 20 percent opacity. [Minn. R , subp. 1(B)] Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R or Minn. R [Minn. R , subp. 1(A)] EQUI 26 Powder Paint Booth Opacity <= 20 percent opacity. [Minn. R , subp. 1(B)] Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R or Minn. R [Minn. R , subp. 1(A)] EQUI 27 Powder Paint Booth Manual Opacity <= 20 percent opacity. [Minn. R , subp. 1(B)] Particulate Matter <= 0.30 grains per dry standard cubic foot of exhaust gas unless required to further reduce emissions to comply with the less stringent limit of either Minn. R or Minn. R [Minn. R , subp. 1(A)] TREA 1 CE001 Mat or Panel Filter The Permittee shall vent emissions from EQUI 1 to TREA 1 whenever EQUI 1 operates, and operate and maintain TREA 1 at all times that any emissions are vented to TREA 1. The Permittee shall document periods of non-operation of the control equipment TREA 1 whenever EQUI 1 is operating. [Minn. R , subp. 14, Minn. R , subp. 2] If the Permittee replaces TREA 1, the replacement control must meet or exceed the control efficiency requirements of TREA 1 as well as comply with all other requirements of TREA 1. Prior to making such a change, the Permittee shall apply for and obtain the appropriate permit amendment, as applicable. If no amendment is needed for the replacement, the Permittee shall submit an electronic notice to the Agency using Form CR-05. The notice must be received by the Agency seven working days

22 Permit Expires: [month day, year] Page 22 of 33 Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation prior to the commencement/start of replacement. [Minn. R , subp. 14, Minn. R , subp. 2] The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for Particulate Matter >= 85 percent control efficiency. [Minn. R , subp. 2] The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for PM < 10 micron >= 85 percent control efficiency. [Minn. R , subp. 2] The Permittee shall operate and maintain control equipment such that it achieves a control efficiency for PM < 2.5 micron >= 85 percent control efficiency. [Minn. R , subp. 2] The Permittee shall operate and maintain the panel filter in accordance with the Operation and Maintenance (O & M) Plan. The Permittee shall keep copies of the O & M Plan available onsite for use by staff and MPCA staff. [Minn. R , subp. 14] Daily Inspections: Once each operating day, the Permittee shall visually inspect the condition of each panel filter with respect to alignment, saturation, tears, holes and any other condition that may affect the filter's performance. The Permittee shall maintain a daily written record of filter inspections. [Minn. R , subp. 4, Minn. R , subp. 5] Periodic Inspections: At least once per calendar quarter, or more frequently as required by the manufacturer's specifications, the Permittee shall inspect the control equipment components. The Permittee shall maintain a written record of these inspections. [Minn. R , subp. 14, Minn. R , subp. 4, Minn. R , subp. 5] Corrective Actions: If the filters or any of their components are found during the inspections to need repair, the Permittee shall take corrective action as soon as possible. Corrective actions shall include completion of necessary repairs identified during the inspection, as applicable. Corrective actions include, but are not limited to, those outlined in the O & M Plan for the filter. The Permittee shall keep a record of the type and date of any corrective action taken for each filter. [Minn. R , subp. 14, Minn. R , subp. 4, Minn. R , subp. 5]

23 Permit Expires: [month day, year] Page 23 of Submittal/action requirements This section lists most of the submittals required by this permit. Please note that some submittal requirements may appear in the Limits and Other Requirements section, or, if applicable, within a Compliance Schedule section. Subject Item Sec.SI.Reqt SI des:si desc Requirement & Citation TFAC Central Boiler Inc The Permittee shall submit a semiannual deviations report: Due semiannually, by the 30th of January and July. The first semiannual report submitted by the Permittee shall cover the calendar half-year in which the permit is issued. The first report of each calendar year covers January 1 - June 30. The second report of each calendar year covers July 1 - December 31. Submit this on form DRF-2 (Deviation Reporting Form). If no deviations have occurred, submit the signed report certifying that there were no deviations. [Minn. R , subp. 6(A)(2)] The Permittee shall submit a compliance certification: Due annually, by the 31st of January (for the previous calendar year). Submit this on form CR-04 (Annual Compliance Certification Report). This report covers all deviations experienced during the calendar year. If no deviations have occurred, submit the signed report certifying that there were no deviations. [Minn. R , subp. 6(C)] EQUI 1 EU001 Liquid Paint Spray Booth - Spray Booth/Coating The Permittee shall submit an annual report by the 31st of January. The report shall document the VOC 12-month rolling sum calculations for the previous calendar year. The report shall be submitted with the annual Compliance Certification required by this permit. As part of the Annual Report, the Permittee shall verify and certify that the Facility has maintained minor source status for Part 70. [Minn. R , subp. 2]

24 Permit Expires: [month day, year] Page 24 of Appendices Appendix A. Insignificant Activities and General Applicable Requirements The table below lists the insignificant activities that are currently at the Facility and their associated general applicable requirements. Minn. R. Rule description of the activity General applicable requirement Minn. R , subp. 3(H)(3) Minn. R , subp. 3(H)(7) Minn. R , subp. 3(I) Brazing, soldering or welding equipment Cleaning operations: alkaline/phosphate cleaners and associated cleaners Individual units with potential emissions less than 2000 lb/year of certain pollutants: PM, variable depending on airflow Opacity <= 20% (Minn. R /0715) 40 CFR pt. 63 subp. XXXXXX (See Appendix B of this permit) PM, variable depending on airflow Opacity <= 20% (Minn. R /0715) Spray Foam Booth (2) Laser Metal Cutting Systems Maintenance Parts Washer R&D Wood Furnace Testing Air Make-up Unit (1.10 MMBtu/hr, propane) Maintenance Power Washer (0.4 MMBtu/hr, propane) Ceramic Brick Oven (12) Space Heaters (each <0.20 MMBtu/hr, propane) (4) Closet heaters (each <0.20 MMBtu/hr, propane) PM, variable depending on airflow Opacity <=20% Minn. R PM and Opacity Minn. R Minn. R , subp. 3(J) (2) Emergency Fire Pumps (5.5 hp each, gasoline) Fugitive dust emissions from unpaved entrance roads and parking lots Opacity and SO2 Minn. R Requirement to take reasonable measures to prevent PM from becoming airborne (Minn. R )

25 Permit Expires: [month day, year] Page 25 of 33 Appendix B: 40 CFR pt. 63, Subpart XXXXXX Requirement APPLICABILITY AND COMPLIANCE DATES Metal Fabrication and Finishing HAP (MFHAP) means any compound of the following metals: Cadmium, chromium, lead, manganese, or nickel, or any of these metals in the elemental form, with the exception of lead. Citation Material containing MFHAP means a material containing one or more MFHAP. Any material that contains cadmium, chromium, lead, or nickel in amounts greater than or equal to 0.1 percent by weight (as the metal), and contains manganese in amounts greater than or equal to 1.0 percent by weight (as the metal), as shown in formulation data provided by the manufacturer or supplier, such as the Material Safety Data Sheet for the material, is considered to be a material containing MFHAP. The facility is an existing source, with affected sources listed and defined below: (2) A machining affected source is the collection of all equipment and activities necessary to (b)-(c) perform machining operations which use materials that contain MFHAP, or that have the potential to emit MFHAP. (5) A welding affected source is the collection of all equipment and activities necessary to perform welding operations which use materials that contain MFHAP, as defined in , or have the potential to emit MFHAP. The compliance date for this subpart is July 25, (a) STANDARDS AND COMPLIANCE REQUIREMENTS Standards for machining. Implement management practices to minimize emissions of MFHAP as specified below for each machining operation that uses materials that contain MFHAP, or has the potential to emit MFHAP. These requirements do not apply when machining operations are being performed that do not use any materials containing MFHAP and do not have the potential to emit MFHAP. (1) Take measures necessary to minimize excess dust in the surrounding area to reduce MFHAP emissions, as practicable; and (2) Operate all equipment associated with machining according to manufacturer's instructions (b) Standards for welding. For each welding operation that uses materials that contain MFHAP, or has the potential to emit MFHAP must comply with the following requirements. If your welding (f) affected source uses 2,000 pounds or more per year of welding rod containing one or more MFHAP (calculated on a rolling 12-month basis), you must demonstrate that management practices or fume control measures are being implemented by complying with the requirements in paragraphs (3)-(8) below. The requirements in paragraphs (1)-(8) below do not apply when welding operations are being performed that do not use any materials containing MFHAP or do not have the potential to emit MFHAP. (1) Operate all equipment, capture, and control devices associated with welding operations according to manufacturer's instructions. Demonstrate compliance with this requirement by maintaining a record of the manufacturer's specifications for the capture and control devices, as specified by the requirements in (c)(4) (f)