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Draft Permit Air Individual Permit Major Amendment 14900013-104 Permittee: DENCO II LLC Facility name: DENCO II LLC 227 County Road 22 Morris, MN 56267-4691 Stevens County Operating permit issuance date: May 1, 2019 Expiration date: May 1, 2024 * All Title I Conditions do not expire Major Amendment: [Action Issue Date] Permit characteristics: State; Limits to avoid Part 70/ Limits to avoid NSR; Limits to avoid NSR The emission units, control equipment and emission stacks at the stationary source authorized in this permit amendment are as described in the submittals listed in the Permit Applications Table. This permit amendment supersedes Air Emission Permit No. 14900013-103 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. 7007.1150 to 7007.1500. 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 § 52.1220 and as such are enforceable by U.S. Environmental Protection Agency (EPA) Administrator or citizens under the Clean Air Act. Signature: [ ] This document has been electronically signed. for the Minnesota Pollution Control Agency for Steven S. Pak, P.E., Manager Air Quality Permits Section Industrial Division Table of Contents Page 1. Permit applications table ............................................................................................................................................. 3 2. Where to send submittals ............................................................................................................................................ 4 3. Facility description ....................................................................................................................................................... 5 4. Summary of subject items ........................................................................................................................................... 7 5. Limits and other requirements .................................................................................................................................. 16 6. Submittal/action requirements ............................................................................................................................... 117 7. Appendices ............................................................................................................................................................... 132 Appendix A. Insignificant activities and general applicable requirements ............................................................ 132 Appendix B. Modeled Parameters for Permit Action 14900013-103 .................................................................... 134 Appendix C. Performance Testing Recordkeeping and Test Methods .................................................................. 143 Appendix D. Subject Item Data for Flexible Permitting ......................................................................................... 146 Appendix E. Ambient Air Boundary Control Strategy Implementation Plan ......................................................... 164 Appendix F. Alternate Test Methods ..................................................................................................................... 166 Appendix G. 40 CFR Part 60, Subpart A—General Provisions ................................................................................ 169 Appendix H. 40 CFR Part 60, Subpart VV—Standards of Performance for Equipment Leaks of VOC in the Synthetic Organic Chemicals Manufacturing Industry for which Construction, Reconstruction, or Modification Commenced After January 5, 1981, and on or Before November 7, 2006 ............................... 275 Appendix I. 40 CFR Part 63, Subpart A—General Provisions ................................................................................. 311 Appendix J. 40 CFR Part 63, Subpart BBBBBB—National Emission Standards for Hazardous Air Pollutants for Source Category: Gasoline Distribution Bulk Terminals, Bulk Plants, and Pipeline Facilities ......................... 386 Appendix K. 40 CFR Part 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 ..................................................................................................................... 409 Permit issued: [month day, year] 14900013-104 Permit expires: [month day, year] Page 3 of 421 1. Permit applications table Permit applications: Title description Application receipt date Action number Major Amendment 01/20/2021 14900013-104 Administrative Amendment 12/21/2020 14900013-104 Administrative Amendment 10/29/2019 14900013-104 State Reissuance 06/19/2017 14900013-103 Permit issued: [month day, year] 14900013-104 Permit expires: [month day, year] Page 4 of 421 2. 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 60604 Each submittal must be postmarked or received by the date specified in the applicable Table. Those submittals required by Minn. R. 7007.0100 to 7007.1850 must be certified by a responsible official, defined in Minn. R. 7007.0100, 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. 20460 Send any application for a permit or permit amendment to: Fiscal Services – 6th Floor Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194 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 Or Email a signed and scanned PDF copy to: Industrial Division [email protected] Minnesota Pollution Control Agency (for submittals related to stack testing) 520 Lafayette Road North [email protected] St. Paul, Minnesota 55155-4194 (for other compliance submittals) (See complete email instructions in “Routine Air Report Instructions Letter” at http://www.pca.state.mn.us/nwqh472.) Permit issued: [month day, year] 14900013-104 Permit expires: [month day, year] Page 5 of 421 3. Facility description The DENCO II LLC (Facility) is located at 227 County Road 22, Morris, Stevens County, Minnesota. DENCO II LLC (DENCO) operates a fuel-ethanol production plant located near Morris, Minnesota in Stevens County. DENCO primarily uses corn feedstock to produce fuel ethanol and co-products. The facility is permitted to produce 30 million gallons of undenatured ethanol and 78,840 tons of dry distiller's grain with solubles (DDGS) per year, use 1.2 million gallons of denaturant per year, and receive 305,455 tons of grain per year. Operations at the facility include corn receiving, milling, fermentation, distillation, dehydration to remove residual water, denaturing (adding gasoline or a similar denaturant to render it non-consumable), storage, and load out to trucks. DDGS is produced, stored onsite, and shipped out by truck. The ethanol isn't denatured until loadout when gasoline is blended into the ethanol. The primary emissions are volatile organic compounds (VOCs), particulate matter (PM), particulate matter smaller than 10 microns (PM10), particulate matter smaller than 2.5 microns (PM2.5), nitrogen oxides (NOx), sulfur dioxide (SO2), and carbon monoxide (CO). VOCs and smaller amounts of hazardous air pollutants (HAPs) are emitted by fermentation, distillation, DDGS drying, ethanol loading, and VOC liquid storage and piping. PM, PM10, PM2.5 are emitted by corn receiving and handling, DDGS handling and drying, and vehicle traffic. NOx, SO2, and CO are emitted by combustion sources. The primary air pollution controls are the pre-scrubber (TREA 4), process scrubber (TREA 3), and the regenerative thermal oxidizer (RTO: TREA 25). The scrubbers control emissions from fermentation and distillation (STRU 14) and the RTO controls emissions from the dryer (EQUI 166). Baghouses control PM/PM10/PM2.5 from grain receiving (TREA 26) and hammermills (TREA 24, TREA 29). Internal floating roofs control emissions from ethanol tanks. A flare (TREA 23) controls emissions from ethanol truck loadout. Emissions from process valves and piping are controlled through an inspection and maintenance program. DENCO operates under a state permit and has taken limits to avoid Prevention of Significant Deterioration (PSD) major source, Part 70 major source, and Part 63 HAP major source. The IND20200005 major amendment lowers the required operating temperature of TREA 25 (RTO) from 1649.5° F to 1640° F, based on results
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