DAQ-2024-009140

DAQE-AN109200010-24

{{$d1 }}

Jason Gauderman
Ardent Mills, LLC
2780 G Avenue
Ogden, UT 84401
[e-mail]

Dear Mr. Gauderman:

Re: Approval Order: Modification to Approval Order DAQE-AN109200009-19 to Add a New Surge
Bin and an Associated Baghouse
Project Number: N109200010

The attached Approval Order (AO) is issued pursuant to the Notice of Intent (NOI) received on June 8,
2023. Ardent Mills, LLC must comply with the requirements of this AO, all applicable state requirements
(R307), and Federal Standards.

The project engineer for this action is Mr. Enqiang He, who can be contacted at [phone] or
[e-mail]. Future correspondence on this AO should include the engineer's name as well as the
DAQE number shown on the upper right-hand corner of this letter. No public comments were received on
this action.

Sincerely,

{{$s }}

Bryce C. Bird
Director

BCB:EH:jg

cc: Weber-Morgan Health Department

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

July 17, 2024

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

{{#s=Sig_es_:signer1:signature}}
{{#d1=date1_es_:signer1:date:format(date, "mmmm d, yyyy")}}
{{#d2=date1_es_:signer1:date:format(date, "mmmm d, yyyy"):align(center)}}

APPROVAL ORDER
DAQE-AN109200010-24
Modification to Approval Order DAQE-AN109200009-19
to Add a New Surge Bin and an Associated Baghouse

Prepared By
Mr. Enqiang He, Engineer
[phone]
[e-mail]

Issued to
Ardent Mills, LLC - Ogden Flour Mill

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality

July 17, 2024
TABLE OF CONTENTS

TITLE/SIGNATURE PAGE ....................................................................................................... 1
GENERAL INFORMATION ...................................................................................................... 3
CONTACT/LOCATION INFORMATION ............................................................................... 3
SOURCE INFORMATION ........................................................................................................ 3
General Description ................................................................................................................ 3
NSR Classification .................................................................................................................. 3
Source Classification .............................................................................................................. 3
Applicable Federal Standards ................................................................................................. 3
Project Description.................................................................................................................. 4
SUMMARY OF EMISSIONS .................................................................................................... 4
SECTION I: GENERAL PROVISIONS .................................................................................... 4
SECTION II: PERMITTED EQUIPMENT .............................................................................. 5
SECTION II: SPECIAL PROVISIONS ..................................................................................... 8
PERMIT HISTORY ..................................................................................................................... 9
ACRONYMS ............................................................................................................................... 10

DAQE-AN109200010-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Ardent Mills, LLC Ardent Mills, LLC - Ogden Flour Mill

Mailing Address Physical Address
2780 G Avenue 2780 G Avenue
Ogden, UT 84401 Ogden, UT 84401

Source Contact UTM Coordinates
Name: Jason Gauderman 416,380 m Easting
Phone: [phone],563,139 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12

SIC code 2041 (Flour & Other Grain Mill Products)

SOURCE INFORMATION
General Description
Ardent Mills, LLC (Ardent) operates a wheat storage and flour mill in Ogden, Weber County. The
processes include grain receiving and shipping, grain cleaning, milling, and storage. Various baghouses
control emissions from the processes.

NSR Classification
Minor Modification at Minor Source

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA
Weber County
Airs Source Size: B

Applicable Federal Standards
None

DAQE-AN109200010-24
Page 4

Project Description
Ardent has requested a modification to AO DAQE-AN109200009-19, dated January 24, 2019, to add a
surge bin for malt ingredient storage controlled by a new baghouse. The baghouse shall vent indoors. In
addition, Ardent has proposed to vent the baghouses, M-07 and CH-01, into the atmosphere. The
baghouses were previously permitted to vent inside the building. These changes will increase 0.02 tpy of
PM10 and 0.01 tpy of PM2.5. Ardent has also proposed to vent the baghouses, E-16 and P-07, inside the
building. The baghouses were previously permitted to vent into the atmosphere. These changes will
decrease 0.02 tpy of PM10 and 0.01 tpy of PM2.5. As a result of the modification, however, emissions are
expected to remain unchanged.

SUMMARY OF EMISSIONS

The emissions listed below are an estimate of the total potential emissions from the source. Some
rounding of emissions is possible.

Criteria Pollutant Change (TPY) Total (TPY)
Particulate Matter - PM10 0 43.80
Particulate Matter - PM2.5 0 23.73

SECTION I: GENERAL PROVISIONS

I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in
the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions
refer to those rules. [R307-101]

I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.3 Modifications to the equipment or processes approved by this AO that could affect the
emissions covered by this AO must be reviewed and approved. [R307-401-1]

I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by
the owner/operator, shall be made available to the Director or Director's representative upon
request, and the records shall include the two-year period prior to the date of the request.
Unless otherwise specified in this AO or in other applicable state and federal rules, records
shall be kept for a minimum of two (2) years. [R307-401-8]

I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators
shall, to the extent practicable, maintain and operate any equipment approved under this AO,
including associated air pollution control equipment, in a manner consistent with good air
pollution control practice for minimizing emissions. Determination of whether acceptable
operating and maintenance procedures are being used will be based on information available to
the Director which may include, but is not limited to, monitoring results, opacity observations,
review of operating and maintenance procedures, and inspection of the source. All maintenance
performed on equipment authorized by this AO shall be recorded. [R307-401-4]

I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

DAQE-AN109200010-24
Page 5

I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories.
[R307-150]

I.8 The owner/operator shall submit documentation of the status of construction or modification to
the Director within 18 months from the date of this AO. This AO may become invalid if
construction is not commenced within 18 months from the date of this AO or if construction is
discontinued for 18 months or more. To ensure proper credit when notifying the Director, send
the documentation to the Director, attn.: NSR Section. [R307-401-18]

SECTION II: PERMITTED EQUIPMENT

II.A THE APPROVED EQUIPMENT

II.A.1 Ardent Mills, LLC
Wheat Storage and Flour Mill

II.A.2 E-01 Baghouse
Service Area: Elevator, Garner, Scales & Distribution (Grain Handling EU03, Grain Storage
EU04, Grain Loadout Truck EU05, Grain Loadout Rail EU06, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 12,800 ACFM
Installed Date: 1968

II.A.3 E-06 Baghouse
Service Area: Elevator Basement & Truck Receiving (Grain Receiving Truck EU01 and Grain
Receiving Rail EU02, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 20,750 ACFM
Installed Date: 1979

II.A.4 E-08 Baghouse
Service Area: Mill Feed Load-Out Conveyors (Feed Load-Out Truck EU24)
Exhaust Flow Rate: 11,700 ACFM
Installed Date: 1971

II.A.5 E-09 Baghouse
Service Area: Grain Load-Out System (Grain Handling EU03, Grain Storage EU04, Grain
Loadout Truck EU05, Grain Loadout Rail EU06, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 2,500 ACFM
Installed Date: 1977

II.A.6 E-10 Baghouse
Service Area: Wheat Cleaning System (Color Sort Wheat Cleaning System EU07)
Exhaust Flow Rate: 13,000 ACFM
Installed Date: 1971

II.A.7 E-16 Baghouse
Service Area: Whole Wheat Load-Out System (Whole Wheat Storage EU17, Whole Wheat
Load-Out Truck EU18, Whole Wheat Load-Out Rail EU19)
Exhaust Flow Rate: 3,500 ACFM
Installed Date: 2014
The baghouse is vented indoors.

DAQE-AN109200010-24
Page 6

II.A.8 M-01 Baghouse
Service Area: Flour Mill, Roll Suction (Flour Milling A Mill EU10)
Exhaust Flow Rate: 11,480 ACFM
Installed Date: 1958

II.A.9 M-03 Baghouse
Service Area: South Mill Purifiers 1-6 (Flour Milling A Mill EU10)
Exhaust Flow Rate: 9,840 ACFM
Installed Date: 1958

II.A.10 M-07 Baghouse
Service Area: General Suction-All Mill Scales, Conveyors, Pin Mill Equipment, and Flour Bins
(Flour Milling A Mill EU10, Flour Milling B Mill EU11, Flour Storage EU13, Packaging/Bulk
Loading Truck EU15, Packaging/Bulk Loading Rail EU16)
Exhaust Flow Rate: 20,000 CFM
Installed Date: 1955

II.A.11 M-08 Baghouse
Service Area: All Whole Wheat Equipment (Whole Wheat Flour Milling C Mill EU12)
Exhaust is vented internally and not discharged into the atmosphere.

II.A.12 M-09 Baghouse
Service Area: Mill Pneumatics System (Flour Milling A Mill EU10)
Exhaust Flow Rate: 17,500 ACFM
Installed Date: 1988

II.A.13 M-10 Baghouse
Service Area: Aspirators, Brk Rolls, and Mill Legs (Flour Milling B Mill EU11)
Exhaust Flow Rate: 22,036 ACFM
Installed Date: 2009

II.A.14 M-11 Baghouse
Service Area: Mill Pneumatics System (Flour Milling B Mill EU11)
Exhaust Flow Rate: 22,036 ACFM
Installed Date: 2009

II.A.15 CH-01 Baghouse
Service Area: Grinding Bin, Combinators, 2nd Temper Entoleters, and Leg (Wheat Cleaning 2
EU09)
Exhaust Flow Rate: 13,000 CFM
Installed Date: 1965

II.A.16 CH-05 Baghouse
Service Area: Wheat Cleaning Equipment (Wheat Cleaning 1 EU08, Screenings Storage EU20,
Feed Storage A Mill EU22)
Exhaust Flow Rate: 23,400 ACFM
Installed Date: 1980

II.A.17 CH-07 Baghouse
Service Area: Screenings and Grinding (Screening Hammermill EU21)
Exhaust Flow Rate: 1,600 ACFM
Installed Date: 1999

DAQE-AN109200010-24
Page 7

II.A.18 CH-08 Baghouse
Service Area: Wheat Cleaning Equipment (Wheat Cleaning 1 EU08, Feed Storage B Mill EU23,
Organic Bran Storage EU28)
Exhaust Flow Rate: 22,036 ACFM
Installed Date: 2009

II.A.19 P-01 Baghouse
Service Area: Bulk-All Truck and Rail Loading Equipment (Packaging/Bulk Loading Truck
EU15, Packaging/Bulk Loading Rail EU16)
Exhaust Flow Rate: 22,036 ACFM
Installed Date: 2009

II.A.20 P-06 Baghouse
Service Area: Ingredient Cut-In Equipment (Malt Flour Ingredient Handling EU14A)
Exhaust is vented internally and not discharged into the atmosphere.

II.A.21 P-06B Baghouse - new equipment
Service Area: the malt ingredient storage unit (surge bin) (Malt Ingredient Storage EU14B)
Exhaust Flow Rate: 570 SCFM
Installed Date: 2023
The baghouse is vented indoors.

II.A.22 P-07 Baghouse
Service Area: Elevator Load/Unload Bin Vent (Food Grade Bran Feed Storage EU26)
Exhaust Flow Rate: 200 ACFM
Installed Date: 2002
Exhaust is vented indoors.

II.A.23 Millfeed Loadout Equipment
(Feed Loadout Truck EU24 and Feed Load Rail EU25)
Bran Mill Loadout Equipment includes:

1. A conveyor of the type that is designed to raise and lower to the top of the truck,
which will reduce open freefall and choke feed the remainder of the load.

2. A quick opening/closing door system on the entrance to the existing loadout building.

II.A.24 Truck/Rail Grain Receiving Pits
(Grain Receiving Truck EU01/FP01 and Grain Receiving Rail EU02/FP02)

1. Baffles below the grating.

2. A quick opening/closing door system on the entrance to the existing receiving building.

3. Aspiration below the baffles to baghouse E-06.

DAQE-AN109200010-24
Page 8

SECTION II: SPECIAL PROVISIONS

II.B REQUIREMENTS AND LIMITATIONS

II.B.1 The Ogden Flour Mill shall be subject to the following:
II.B.1.a The owner/operator shall not allow visible emissions from the following emission points to
exceed the following values:

A. Truck/Railcar unloading station - 5% opacity.

B. Railcar loading station - 5% opacity.

C. Truck loading station - 10% opacity.

D. All baghouse exhaust stacks - 10% opacity.

E. All other points - 20% opacity.

[R307-401-8]

II.B.1.a.1 Opacity observations of emissions from stationary sources shall be conducted according to 40
CFR 60, Appendix A, Method 9. [R307-201-3]

II.B.2 Baghouse Requirements
II.B.2.a The owner/operator shall install a manometer or magnehelic pressure gauge to measure the
differential pressure across the fabric filters in each of the following baghouses: E-01, E-06,
E-08, E-09, E-10, M-01, M-03, M-07, M-09, M-10, M-11, CH-01, CH-05, CH-07, CH-08, and
P-01. All exhaust air from the processes shall be routed through their designated baghouses
before being vented to the atmosphere. [R307-401-8]

II.B.2.a.1 The pressure gauges shall be located such that an inspector/operator can safely read the
indicators at any time. [R307-401-8]

II.B.2.a.2 The pressure gauges shall measure the pressure drop in 0.5-inch water column increments or less.
[R307-401-8]

II.B.2.b During operation of the baghouses, the owner/operator shall maintain the static pressure drop
across the baghouses between 0.5 and 8.0 inches of water column. [R307-401-8]

II.B.2.b.1 The owner/operator shall record the pressure drop through each baghouse for each day the
controlled processes are in operation. [R307-401-8]

II.B.2.b.2 The owner/operator shall maintain the following records of the pressure drop readings:

A. Unit identification;

B. Date of reading;

C. Daily static pressure drop readings.

[R307-401-8]

II.B.2.c The owner/operator shall operate, maintain, and calibrate the pressure gauges in accordance with
the manufacturer's instructions/recommendations or replace the gauges. [R307-401-8]

DAQE-AN109200010-24
Page 9

II.B.2.c.1 The owner/operator shall keep the following records:

A. Unit identification.

B. Dates of pressure gauge calibration or replacement.

[R307-401-8]

II.B.3 All Haul Roads and Fugitive Dust Sources shall be subject to the following:
II.B.3.a The owner/operator shall periodically sweep or water spray the in-plant paved haul road to meet
the following visible emission limits:

A. 20% opacity on site, and

B. 10% opacity at the property boundary.

[R307-309-5, R307-401]

II.B.3.a.1 The owner/operator shall keep records of sweeps and water sprays to include the following:

A. Date of sweeps or water sprays.

B. Time of day sweeps or water sprays conducted.

The owner/operator may stop sweeps when the paved haul roads are covered with snow, and may
stop water spray when the temperature is below freezing.

[R307-401-8]

II.B.3.a.2 The records shall be kept for all periods when the plant is in operation. [R307-401-8]

II.B.3.a.3 Visible emission determinations for fugitive dust emissions from haul-road traffic and mobile
equipment in operational areas shall use procedures similar to Method 9. The normal requirement
for observations to be made at 15-second intervals over a six-minute period, however, shall not
apply. Visible emissions shall be measured at the densest point of the plume but at a point not
less than 1/2 vehicle length behind the vehicle and not less than 1/2 the height of the vehicle.
[R307-309, R307-401-8]

II.B.3.b The owner/operator shall conduct its operations in such a way to minimize fugitive dust and
fugitive emissions and shall comply with all applicable requirements of R307-309. [R307-309]

PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents:

Supersedes AO DAQE-AN109200009-19 dated January 24, 2019
Incorporates Additional information dated June 9, 2023
Incorporates Additional information dated December 6, 2023
Incorporates Additional information dated February 26, 2024
Incorporates Additional information dated April 12, 2024

DAQE-AN109200010-24
Page 10

ACRONYMS

The following lists commonly used acronyms and associated translations as they apply to this document:

40 CFR Title 40 of the Code of Federal Regulations
AO Approval Order
BACT Best Available Control Technology
CAA Clean Air Act
CAAA Clean Air Act Amendments
CDS Classification Data System (used by Environmental Protection Agency to classify
sources by size/type)
CEM Continuous emissions monitor
CEMS Continuous emissions monitoring system
CFR Code of Federal Regulations
CMS Continuous monitoring system
CO Carbon monoxide
CO2 Carbon Dioxide
CO2e Carbon Dioxide Equivalent - Title 40 of the Code of Federal Regulations Part 98,
Subpart A, Table A-1
COM Continuous opacity monitor
DAQ/UDAQ Division of Air Quality
DAQE This is a document tracking code for internal Division of Air Quality use
EPA Environmental Protection Agency
FDCP Fugitive dust control plan
GHG Greenhouse Gas(es) - Title 40 of the Code of Federal Regulations 52.21 (b)(49)(i)
GWP Global Warming Potential - Title 40 of the Code of Federal Regulations Part 86.1818-
12(a)
HAP or HAPs Hazardous air pollutant(s)
ITA Intent to Approve
LB/YR Pounds per year
MACT Maximum Achievable Control Technology
MMBTU Million British Thermal Units
NAA Nonattainment Area
NAAQS National Ambient Air Quality Standards
NESHAP National Emission Standards for Hazardous Air Pollutants
NOI Notice of Intent
NOx Oxides of nitrogen
NSPS New Source Performance Standard
NSR New Source Review
PM10 Particulate matter less than 10 microns in size
PM2.5 Particulate matter less than 2.5 microns in size
PSD Prevention of Significant Deterioration
PTE Potential to Emit
R307 Rules Series 307
R307-401 Rules Series 307 - Section 401
SO2 Sulfur dioxide
Title IV Title IV of the Clean Air Act
Title V Title V of the Clean Air Act
TPY Tons per year
UAC Utah Administrative Code
VOC Volatile organic compounds

Standard Examiner
Publication Name:
Standard Examiner
Publication URL:
www.standard.net
Publication City and State:
Ogden, UT
Publication County:
Weber
Notice Popular Keyword Category:
Notice Keywords:
ardent
Notice Authentication Number:
202406101159076777946
1761527914
Notice URL:
Back
Notice Publish Date:
Saturday, June 08, 2024
Notice Content
NOTICE A Notice of Intent for the following project submitted in accordance with R307-401-1, Utah Administrative Code (UAC), has been
received for consideration by the Director: Company Name: Ardent Mills, LLC Location: Ardent Mills, LLC - Ogden Flour Mill - 2780 G Avenue,
Ogden, UT Project Description: Ardent Mills, LLC (Ardent) operates a wheat storage and flour mill in Ogden, Weber County. Ardent has
requested a modification to Approval Order DAQE-AN10920000-19, dated January 24, 2019, to add a surge bin for malt ingredient storage
controlled by a new baghouse. The baghouse shall vent indoors. In addition, Ardent has proposed to vent the baghouses, M-07 and CH-01,
to the atmosphere and to vent the baghouses, E-16 and P-07, inside the building. As a result of the modification, however, emissions are
expected to remain unchanged. The completed engineering evaluation and air quality impact analysis showed the proposed project meets the
requirements of federal air quality regulations and the State air quality rules. The Director intends to issue an Approval Order pending a 30-
day public comment period. The project proposal, estimate of the effect on local air quality and draft Approval Order are available for public
inspection and comment at the Utah Division of Air Quality, 195 North 1950 West, Salt Lake City, UT 84116. Written comments received by
the Division at this same address on or before July 8, 2024 will be considered in making the final decision on the approval/disapproval of the
proposed project. Email comments will also be accepted at [e-mail]. If anyone so requests to the Director in writing within 15 days of
publication of this notice, a hearing will be held in accordance with R307-401-7, UAC. Under Section 19-1-301.5, a person who wishes to
challenge a Permit Order may only raise an issue or argument during an adjudicatory proceeding that was raised during the public comment
period and was supported with sufficient information or documentation to enable the Director to fully consider the substance and significance
of the issue. Date of Notice: June 8, 2024 Legal Notice 12955 Published in the Standard Examiner on June 8, 2024
Back

DAQE-IN109200010-24

June 6, 2024

Jason Gauderman
Ardent Mills, LLC
2780 G Avenue
Ogden, UT 84401
[e-mail]

Dear Mr. Gauderman:

Re: Intent to Approve: Modification to Approval Order DAQE-AN109200009-19 to Add a New
Surge Bin and an Associated Baghouse
Project Number: N109200010

The attached document is the Intent to Approve (ITA) for the above-referenced project. The ITA is
subject to public review. Any comments received shall be considered before an Approval Order (AO) is
issued. The Division of Air Quality is authorized to charge a fee for reimbursement of the actual costs
incurred in the issuance of an AO. An invoice will follow upon issuance of the final AO.

Future correspondence on this ITA should include the engineer's name, Mr. Enqiang He, as well as the
DAQE number as shown on the upper right-hand corner of this letter. Mr. Enqiang He, can be reached at
[phone] or [e-mail], if you have any questions.

Sincerely,

{{$s }}

Alan D. Humpherys, Manager
New Source Review Section

ADH:EH:jg

cc: Weber-Morgan Health Department

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

INTENT TO APPROVE
DAQE-IN109200010-24
Modification to Approval Order DAQE-AN109200009-19
to Add a New Surge Bin and an Associated Baghouse

Prepared By
Mr. Enqiang He, Engineer
[phone]
[e-mail]

Issued to
Ardent Mills, LLC - Ogden Flour Mill

Issued On
June 6, 2024

{{$s }}

New Source Review Section Manager
Alan D. Humpherys
{{#s=Sig_es_:signer1:signature}}

TABLE OF CONTENTS

TITLE/SIGNATURE PAGE ....................................................................................................... 1
GENERAL INFORMATION ...................................................................................................... 3
CONTACT/LOCATION INFORMATION ............................................................................... 3
SOURCE INFORMATION ........................................................................................................ 3
General Description ................................................................................................................ 3
NSR Classification .................................................................................................................. 3
Source Classification .............................................................................................................. 3
Applicable Federal Standards ................................................................................................. 3
Project Description.................................................................................................................. 3
SUMMARY OF EMISSIONS .................................................................................................... 4
PUBLIC NOTICE STATEMENT............................................................................................... 4
SECTION I: GENERAL PROVISIONS .................................................................................... 4
SECTION II: PERMITTED EQUIPMENT .............................................................................. 5
SECTION II: SPECIAL PROVISIONS ..................................................................................... 8
PERMIT HISTORY ................................................................................................................... 10
ACRONYMS ............................................................................................................................... 11

DAQE-IN109200010-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Ardent Mills, LLC Ardent Mills, LLC - Ogden Flour Mill

Mailing Address Physical Address
2780 G Avenue 2780 G Avenue
Ogden, UT 84401 Ogden, UT 84401

Source Contact UTM Coordinates
Name: Jason Gauderman 416,380 m Easting
Phone: [phone],563,139 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12

SIC code 2041 (Flour & Other Grain Mill Products)

SOURCE INFORMATION
General Description
Ardent Mills, LLC (Ardent) operates a wheat storage and flour mill in Ogden, Weber County. The
processes include grain receiving and shipping, grain cleaning, milling, and storage. Various baghouses
control emissions from the processes.
NSR Classification
Minor Modification at Minor Source

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA
Weber County
Airs Source Size: B

Applicable Federal Standards
None
Project Description
Ardent has requested a modification to AO DAQE-AN10920000-19, dated January 24, 2019, to add a
surge bin for malt ingredient storage controlled by a new baghouse. The baghouse shall vent indoors. In
addition, Ardent has proposed to vent the baghouses, M-07 and CH-01, into the atmosphere. The
baghouses were previously permitted to vent inside the building. These changes will increase 0.02 tpy of
PM10 and 0.01 tpy of PM2.5. Ardent has also proposed to vent the baghouses, E-16 and P-07, inside the
building. The baghouses were previously permitted to vent into the atmosphere. These changes will
decrease 0.02 tpy of PM10 and 0.01 tpy of PM2.5. As a result of the modification, however, emissions are
expected to remain unchanged.
DAQE-IN109200010-24
Page 4

SUMMARY OF EMISSIONS

The emissions listed below are an estimate of the total potential emissions from the source. Some
rounding of emissions is possible.

Criteria Pollutant Change (TPY) Total (TPY)
Particulate Matter - PM10 0 43.80
Particulate Matter - PM2.5 0 23.73

PUBLIC NOTICE STATEMENT

The NOI for the above-referenced project has been evaluated and has been found to be consistent with the
requirements of UAC R307. Air pollution producing sources and/or their air control facilities may not be
constructed, installed, established, or modified prior to the issuance of an AO by the Director.

A 30-day public comment period will be held in accordance with UAC R307-401-7. A notification of the
intent to approve will be published in the Ogden Standard Examiner on June 8, 2024. During the public
comment period the proposal and the evaluation of its impact on air quality will be available for the
public to review and provide comment. If anyone so requests a public hearing within 15 days of
publication, it will be held in accordance with UAC R307-401-7. The hearing will be held as close as
practicable to the location of the source. Any comments received during the public comment period and
the hearing will be evaluated. The proposed conditions of the AO may be changed as a result of the
comments received.

SECTION I: GENERAL PROVISIONS

The intent is to issue an air quality AO authorizing the project with the following recommended
conditions and that failure to comply with any of the conditions may constitute a violation of the AO.

I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in
the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions
refer to those rules. [R307-101]

I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.3 Modifications to the equipment or processes approved by this AO that could affect the
emissions covered by this AO must be reviewed and approved. [R307-401-1]

I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by
the owner/operator, shall be made available to the Director or Director's representative upon
request, and the records shall include the two-year period prior to the date of the request.
Unless otherwise specified in this AO or in other applicable state and federal rules, records
shall be kept for a minimum of two (2) years. [R307-401-8]

DAQE-IN109200010-24
Page 5

I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators
shall, to the extent practicable, maintain and operate any equipment approved under this AO,
including associated air pollution control equipment, in a manner consistent with good air
pollution control practice for minimizing emissions. Determination of whether acceptable
operating and maintenance procedures are being used will be based on information available to
the Director which may include, but is not limited to, monitoring results, opacity observations,
review of operating and maintenance procedures, and inspection of the source. All maintenance
performed on equipment authorized by this AO shall be recorded. [R307-401-4]

I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories.
[R307-150]

I.8 The owner/operator shall submit documentation of the status of construction or modification to
the Director within 18 months from the date of this AO. This AO may become invalid if
construction is not commenced within 18 months from the date of this AO or if construction is
discontinued for 18 months or more. To ensure proper credit when notifying the Director, send
the documentation to the Director, attn.: NSR Section. [R307-401-18]

SECTION II: PERMITTED EQUIPMENT

The intent is to issue an air quality AO authorizing the project with the following recommended
conditions and that failure to comply with any of the conditions may constitute a violation of the AO.

II.A THE APPROVED EQUIPMENT

II.A.1 Ardent Mills, LLC
Wheat Storage and Flour Mill

II.A.2 E-01 Baghouse
Service Area: Elevator, Garner, Scales & Distribution (Grain Handling EU03, Grain Storage
EU04, Grain Loadout Truck EU05, Grain Loadout Rail EU06, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 12,800 ACFM
Installed Date: 1968

II.A.3 E-06 Baghouse
Service Area: Elevator Basement & Truck Receiving (Grain Receiving Truck EU01 and Grain
Receiving Rail EU02, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 20,750 ACFM
Installed Date: 1979

II.A.4 E-08 Baghouse
Service Area: Mill Feed Load-Out Conveyors (Feed Load-Out Truck EU24)
Exhaust Flow Rate: 11,700 ACFM
Installed Date: 1971

DAQE-IN109200010-24
Page 6

II.A.5 E-09 Baghouse
Service Area: Grain Load-out System (Grain Handling EU03, Grain Storage EU04, Grain
Loadout Truck EU05, Grain Loadout Rail EU06, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 2,500 ACFM
Installed Date: 1977

II.A.6 E-10 Baghouse
Service Area: Wheat Cleaning System (Color Sort Wheat Cleaning System EU07)
Exhaust Flow Rate: 13,000 ACFM
Installed Date: 1971

II.A.7 E-16 Baghouse
Service Area: Whole Wheat Load-out System (Whole Wheat Storage EU17, Whole Wheat
Load-Out Truck EU18, Whole Wheat Load-Out Rail EU19)
Exhaust Flow Rate: 3,500 ACFM
Installed Date: 2014
The baghouse is vented indoors.

II.A.8 M-01 Baghouse
Service Area: Flour Mill, Roll Suction (Flour Milling A Mill EU10)
Exhaust Flow Rate: 11,480 ACFM
Installed Date: 1958

II.A.9 M-03 Baghouse
Service Area: South Mill Purifiers 1-6 (Flour Milling A Mill EU10)
Exhaust Flow Rate: 9,840 ACFM
Installed Date: 1958

II.A.10 M-07 Baghouse
Service Area: General Suction-All Mill Scales, Conveyors, Pin Mill Equipment & Flour Bins
(Flour Milling A Mill EU10, Flour Milling B Mill EU11, Flour Storage EU13, Packaging/Bulk
Loading Truck EU15, Packaging/Bulk Loading Rail EU16)
Exhaust Flow Rate: 20,000 CFM
Installed Date: 1955

II.A.11 M-08 Baghouse
Service Area: All Whole Wheat Equipment (Whole Wheat Flour Milling C Mill EU12)
Exhaust is vented internally and not discharged into the atmosphere.

II.A.12 M-09 Baghouse
Service Area: Mill Pneumatics System (Flour Milling A Mill EU10)
Exhaust Flow Rate: 17,500 ACFM
Installed Date: 1988

II.A.13 M-10 Baghouse
Service Area: Aspirators, Brk Rolls, and Mill Legs (Flour Milling B Mill EU11)
Exhaust Flow Rate: 22,036 ACFM
Installed Date: 2009

II.A.14 M-11 Baghouse
Service Area: Mill Pneumatics System (Flour Milling B Mill EU11)
Exhaust Flow Rate: 22,036 ACFM
Installed Date: 2009

DAQE-IN109200010-24
Page 7

II.A.15 CH-01 Baghouse
Service Area: Grinding Bin, Combinators, 2nd Temper Entoleters, and Leg (Wheat Cleaning 2
EU09)
Exhaust Flow Rate: 13,000 CFM
Installed Date: 1965

II.A.16 CH-05 Baghouse
Service Area: Wheat Cleaning Equipment (Wheat Cleaning 1 EU08, Screenings Storage EU20,
Feed Storage A Mill EU22)
Exhaust Flow Rate: 23,400 ACFM
Installed Date: 1980

II.A.17 CH-07 Baghouse
Service Area: Screenings and Grinding (Screening Hammermill EU21)
Exhaust Flow Rate: 1,600 ACFM
Installed Date: 1999

II.A.18 CH-08 Baghouse
Service Area: Wheat Cleaning Equipment (Wheat Cleaning 1 EU08, Feed Storage B Mill EU23,
Organic Bran Storage EU28)
Exhaust Flow Rate: 22,036 ACFM
Installed Date: 2009

II.A.19 P-01 Baghouse
Service Area: Bulk-All Truck and Rail Loading Equipment (Packaging/Bulk Loading Truck
EU15, Packaging/Bulk Loading Rail EU16)
Exhaust Flow Rate: 22,036 ACFM Installed Date: 2009

II.A.20 P-06 Baghouse
Service Area: Ingredient Cut-In Equipment (Malt Flour Ingredient Handling EU14A)
Exhaust is vented internally and not discharged into the atmosphere.

II.A.21 P-06B Baghouse - new equipment
Service Area: the malt ingredient storage unit (surge bin) (Malt Ingredient Storage EU14B)
Exhaust Flow Rate: 570 SCFM
Installed Date: 2023
The baghouse is vented indoors.

II.A.22 P-07 Baghouse
Service Area: Elevator Load/Unload Bin Vent (Food Grade Bran Feed Storage EU26)
Exhaust Flow Rate: 200 ACFM
Installed Date: 2002
The exhaust is vented indoors.

II.A.23 Millfeed Loadout Equipment
(Feed Loadout Truck EU24 and Feed Load Rail EU25)
Bran Mill Loadout Equipment includes:

1. A conveyor of the type that is designed to raise and lower to the top of the truck,
which will reduce open freefall and choke feed the remainder of the load.

2. A quick opening/closing door system on the entrance to the existing loadout building.

DAQE-IN109200010-24
Page 8

II.A.24 Truck/Rail Grain Receiving Pits
(Grain Receiving Truck EU01/FP01 and Grain Receiving Rail EU02/FP02)

1. Baffles below the grating.

2. A quick opening/closing door system on the entrance to the existing receiving building.

3. Aspiration below the baffles to baghouse E-06.

SECTION II: SPECIAL PROVISIONS

The intent is to issue an air quality AO authorizing the project with the following recommended
conditions and that failure to comply with any of the conditions may constitute a violation of the AO.

II.B REQUIREMENTS AND LIMITATIONS

II.B.1 The Ogden Flour Mill shall be subject to the following:
II.B.1.a The owner/operator shall not allow visible emissions from the following emission points to
exceed the following values:

A. Truck/Railcar unloading station - 5% opacity.

B. Railcar loading station - 5% opacity.

C. Truck loading station - 10% opacity.

D. All baghouse exhaust stacks - 10% opacity.

E. All other points - 20% opacity.

[R307-401-8]

II.B.1.a.1 Opacity observations of emissions from stationary sources shall be conducted according to 40
CFR 60, Appendix A, Method 9. [R307-201-3]

II.B.2 Baghouse Requirements
II.B.2.a The owner/operator shall install a manometer or magnehelic pressure gauge to measure the
differential pressure across the fabric filters in each of the following baghouses: E-01, E-06,
E-08, E-09, E-10, M-01, M-03, M-07, M-09, M-10, M-11, CH-01, CH-05, CH-07, CH-08, and
P-01. All exhaust air from the processes shall be routed through their designated baghouses
before being vented to the atmosphere. [R307-401-8]

II.B.2.a.1 The pressure gauges shall be located such that an inspector/operator can safely read the
indicators at any time. [R307-401-8]

II.B.2.a.2 The pressure gauges shall measure the pressure drop in 0.5-inch water column increments or less.
[R307-401-8]

II.B.2.b During operation of the baghouses, the owner/operator shall maintain the static pressure drop
across the baghouses between 0.5 and 8.0 inches of water column. [R307-401-8]

II.B.2.b.1 The owner/operator shall record the pressure drop through each baghouse for each day the
controlled processes are in operation. [R307-401-8]

DAQE-IN109200010-24
Page 9

II.B.2.b.2 The owner/operator shall maintain the following records of the pressure drop readings:

A. Unit identification;

B. Date of reading;

C. Daily static pressure drop readings.

[R307-401-8]

II.B.2.c The owner/operator shall operate, maintain, and calibrate the pressure gauges in accordance with
the manufacturer's instructions/recommendations or replace the gauges. [R307-401-8]

II.B.2.c.1 The owner/operator shall keep the following records:

A. Unit identification.

B. Dates of pressure gauge calibration or replacement.

[R307-401-8]

II.B.3 All Haul Roads and Fugitive Dust Sources shall be subject to the following:
II.B.3.a The owner/operator shall periodically sweep or water spray the in-plant paved haul road to meet
the following visible emission limits:

A. 20% opacity on site, and

B. 10% opacity at the property boundary.

[R307-309-5, R307-401]

II.B.3.a.1 The owner/operator shall keep records of sweeps and water sprays to include the following:

A. Date of sweeps or water sprays.

B. Time of day sweeps or water sprays conducted.

The owner/operator may stop sweeps when the paved haul roads are covered
with snow and may stop water spray when the temperature is below freezing.
[R307-401-8]

II.B.3.a.2 The records shall be kept for all periods when the plant is in operation. [R307-401-8]

II.B.3.a.3 Visible emission determinations for fugitive dust emissions from haul-road traffic and mobile
equipment in operational areas shall use procedures similar to Method 9. The normal requirement
for observations to be made at 15-second intervals over a six-minute period, however, shall not
apply. Visible emissions shall be measured at the densest point of the plume but at a point not
less than 1/2 vehicle length behind the vehicle and not less than 1/2 the height of the vehicle.
[R307-309, R307-401-8]

II.B.3.b The owner/operator shall conduct its operations in such a way to minimize fugitive dust and
fugitive emissions and shall comply with all applicable requirements of R307-309. [R307-309]

DAQE-IN109200010-24
Page 10

PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents:

Supersedes AO DAQE-AN0109200009-19 dated January 24, 2019
Incorporates Additional information dated June 9, 2023
Incorporates Additional information dated December 6, 2023
Incorporates Additional information dated February 26, 2024
Incorporates Additional information dated April 12, 2024

DAQE-IN109200010-24
Page 11

ACRONYMS

The following lists commonly used acronyms and associated translations as they apply to this document:

40 CFR Title 40 of the Code of Federal Regulations
AO Approval Order
BACT Best Available Control Technology
CAA Clean Air Act
CAAA Clean Air Act Amendments
CDS Classification Data System (used by Environmental Protection Agency to classify
sources by size/type)
CEM Continuous emissions monitor
CEMS Continuous emissions monitoring system
CFR Code of Federal Regulations
CMS Continuous monitoring system
CO Carbon monoxide
CO2 Carbon Dioxide
CO2e Carbon Dioxide Equivalent - Title 40 of the Code of Federal Regulations Part 98,
Subpart A, Table A-1
COM Continuous opacity monitor
DAQ/UDAQ Division of Air Quality
DAQE This is a document tracking code for internal Division of Air Quality use
EPA Environmental Protection Agency
FDCP Fugitive dust control plan
GHG Greenhouse Gas(es) - Title 40 of the Code of Federal Regulations 52.21 (b)(49)(i)
GWP Global Warming Potential - Title 40 of the Code of Federal Regulations Part 86.1818-
12(a)
HAP or HAPs Hazardous air pollutant(s)
ITA Intent to Approve
LB/YR Pounds per year
MACT Maximum Achievable Control Technology
MMBTU Million British Thermal Units
NAA Nonattainment Area
NAAQS National Ambient Air Quality Standards
NESHAP National Emission Standards for Hazardous Air Pollutants
NOI Notice of Intent
NOx Oxides of nitrogen
NSPS New Source Performance Standard
NSR New Source Review
PM10 Particulate matter less than 10 microns in size
PM2.5 Particulate matter less than 2.5 microns in size
PSD Prevention of Significant Deterioration
PTE Potential to Emit
R307 Rules Series 307
R307-401 Rules Series 307 - Section 401
SO2 Sulfur dioxide
Title IV Title IV of the Clean Air Act
Title V Title V of the Clean Air Act
TPY Tons per year
UAC Utah Administrative Code
VOC Volatile organic compounds

DAQE-NN109200010-24

June 6, 2024

Ogden Standard Examiner
Legal Advertising Dept.
Standard Way
P.O. Box 12790332
Ogden, UT 84412

RE: Legal Notice of Intent to Approve

This letter will confirm the authorization to publish the attached NOTICE in the Ogden Standard
Examiner on June 8, 2024.

Please mail the invoice and affidavit of publication to the Utah State Department of Environmental
Quality, Division of Air Quality, P.O. Box 144820, Salt Lake City, Utah 84114-4820. If you have any
questions, contact Jeree Greenwood, who may be reached at [phone].

Sincerely,

{{$s }}

Jeree Greenwood
Office Technician

Enclosure

cc: Wasatch Front Regional Council
cc: Weber County

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
State of Utah

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

DAQE-NN109200010-24
Page 2
NOTICE

A Notice of Intent for the following project submitted in accordance with R307-401-1, Utah
Administrative Code (UAC), has been received for consideration by the Director:

Company Name: Ardent Mills, LLC
Location: Ardent Mills, LLC - Ogden Flour Mill – 2780 G Avenue, Ogden, UT
Project Description: Ardent Mills, LLC (Ardent) operates a wheat storage and flour mill in Ogden,
Weber County. Ardent has requested a modification to Approval Order
DAQE-AN10920000-19, dated January 24, 2019, to add a surge bin for malt
ingredient storage controlled by a new baghouse. The baghouse shall vent
indoors. In addition, Ardent has proposed to vent the baghouses, M-07 and
CH-01, to the atmosphere and to vent the baghouses, E-16 and P-07, inside the
building. As a result of the modification, however, emissions are expected to
remain unchanged.

The completed engineering evaluation and air quality impact analysis showed the proposed project meets
the requirements of federal air quality regulations and the State air quality rules. The Director intends to
issue an Approval Order pending a 30-day public comment period. The project proposal, estimate of the
effect on local air quality and draft Approval Order are available for public inspection and comment at the
Utah Division of Air Quality, 195 North 1950 West, Salt Lake City, UT 84116. Written comments
received by the Division at this same address on or before July 8, 2024 will be considered in making the
final decision on the approval/disapproval of the proposed project. Email comments will also be accepted
at [e-mail]. If anyone so requests to the Director in writing within 15 days of publication of this
notice, a hearing will be held in accordance with
R307-401-7, UAC.

Under Section 19-1-301.5, a person who wishes to challenge a Permit Order may only raise an issue or
argument during an adjudicatory proceeding that was raised during the public comment period and was
supported with sufficient information or documentation to enable the Director to fully consider the
substance and significance of the issue.

Date of Notice: June 8, 2024

{{#s=Sig_es_:signer1:signature}}

DAQE-

RN109200010
April 18, 2024

Jason Gauderman
Ardent Mills, LLC
2780 G Avenue
Ogden, UT 84401
[e-mail]

Dear Jason Gauderman,

Re: Engineer Review:
Modification to AO DAQE-AN109200009-19 to Add a New Surge Bin and an Associated
Baghouse
Project Number: N109200010

The DAQ requests a company representative review and sign the attached Engineer Review (ER). This
ER identifies all applicable elements of the New Source Review permitting program. Ardent Mills, LLC
should complete this review within 10 business days of receipt.

Ardent Mills, LLC should contact Mr. Enqiang He at [phone] if there are questions or concerns
with the review of the draft permit conditions. Upon resolution of your concerns, please email Mr.
Enqiang He at [e-mail] the signed cover letter. Upon receipt of the signed cover letter, the DAQ
will prepare an ITA for a 30-day public comment period. At the completion of the comment period, the
DAQ will address any comments and will prepare an Approval Order (AO) for signature by the DAQ
Director.

If Ardent Mills, LLC does not respond to this letter within 10 business days, the project will move
forward without source concurrence. If Ardent Mills, LLC has concerns that cannot be resolved and the
project becomes stagnant, the DAQ Director may issue an Order prohibiting construction.

Approval Signature _____________________________________________________________
(Signature & Date)

195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone]
www.deq.utah.gov
Printed on 100% recycled paper
Department of
Environmental Quality

Kimberly D. Shelley Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird Director

State of Utah

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 1
UTAH DIVISION OF AIR QUALITY
ENGINEER REVIEW

SOURCE INFORMATION

Project Number N109200010
Owner Name Ardent Mills, LLC
Mailing Address 2780 G Avenue
Ogden, UT 84401

Source Name Ardent Mills, LLC- Ogden Flour Mill
Source Location 2780 G Avenue
Ogden, UT 84401

UTM Projection 416,380 m Easting, 4,563,139 m Northing
UTM Datum NAD83
UTM Zone UTM Zone 12
SIC Code 2041 (Flour & Other Grain Mill Products)

Source Contact Jason Gauderman
Phone Number [phone]
Email [e-mail]

Billing Contact Jason Gauderman
Phone Number [phone]
Email [e-mail]

Project Engineer Mr. Enqiang He, Engineer
Phone Number [phone]
Email [e-mail]

Notice of Intent (NOI) Submitted June 8, 2023
Date of Accepted Application April 18, 2024

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 2
SOURCE DESCRIPTION

General Description
Ardent Mills, LLC (Ardent) operates a wheat storage and flour mill in Ogden, Weber County.
The processes include grain receiving and shipping, grain cleaning, milling, and storage. Various
baghouses control emissions from the processes.

NSR Classification:
Minor Modification at Minor Source

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA,
Weber County
Airs Source Size: B

Applicable Federal Standards
None

Project Proposal
Modification to AO DAQE-AN109200009-19 to Add a New Surge Bin and an Associated
Baghouse

Project Description
Ardent has requested a modification to AO DAQE-AN10920000-19, dated January 24, 2019, to
add a surge bin for malt ingredient storage controlled by a new baghouse. The baghouse shall
vent indoors. In addition, Ardent has proposed to vent the baghouses, M-07 and CH-01, to the
atmosphere; The baghouses were previously permitted to vent inside the building. These changes
will increase 0.02 tpy of PM10 and 0.01 tpy of PM2.5. Ardent has also proposed to vent the
baghouses, E-16 and P-07, inside the building. The baghouses were previously permitted to vent
to the atmosphere. These changes will decrease 0.02 tpy of PM10 and 0.01 tpy of PM2.5. As a
result of the modification, however, emissions are expected to remain unchanged.

EMISSION IMPACT ANALYSIS
There are no emission increases as a result of this modification; therefore, modeling is not required per R307-
410. [Last updated January 22, 2024]

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 3
SUMMARY OF EMISSIONS

The emissions listed below are an estimate of the total potential emissions from the source. Some
rounding of emissions is possible.

Criteria Pollutant Change (TPY) Total (TPY)
Particulate Matter - PM10 0 43.80
Particulate Matter - PM2.5 0 23.73

Note: Change in emissions indicates the difference between previous AO and proposed modification.

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 4
Review of BACT for New/Modified Emission Units

1. BACT review regarding the new malt ingredient storage (surge bin)
The new surge bin shall be controlled with a baghouse which vents indoors. There are no
emissions to the atmosphere.

Baghouses M-07 and CH-01 used to vent indoors. The source is now proposing to vent the
baghouses to the atmosphere. The baghouse can control particulate emissions for more than 99%,
and therefore, are considered BACT. Visible emissions are limited to 10% opacity. The Minor
NSR Section considers the use of baghouses and the opacity limit as BACT.
[Last updated January 22, 2024]

SECTION I: GENERAL PROVISIONS

The intent is to issue an air quality AO authorizing the project with the following recommended
conditions and that failure to comply with any of the conditions may constitute a violation of the
AO. (New or Modified conditions are indicated as “New” in the Outline Label):

I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in
the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions
refer to those rules. [R307-101]

I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.3 Modifications to the equipment or processes approved by this AO that could affect the
emissions covered by this AO must be reviewed and approved. [R307-401-1]

I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by
the owner/operator, shall be made available to the Director or Director's representative upon
request, and the records shall include the two-year period prior to the date of the request.
Unless otherwise specified in this AO or in other applicable state and federal rules, records
shall be kept for a minimum of two (2) years. [R307-401-8]

I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators
shall, to the extent practicable, maintain and operate any equipment approved under this AO,
including associated air pollution control equipment, in a manner consistent with good air
pollution control practice for minimizing emissions. Determination of whether acceptable
operating and maintenance procedures are being used will be based on information available
to the Director which may include, but is not limited to, monitoring results, opacity
observations, review of operating and maintenance procedures, and inspection of the source.
All maintenance performed on equipment authorized by this AO shall be recorded. [R307-
401-4]

I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 5
I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-
150]

I.8 The owner/operator shall submit documentation of the status of construction or modification
to the Director within 18 months from the date of this AO. This AO may become invalid if
construction is not commenced within 18 months from the date of this AO or if construction is
discontinued for 18 months or more. To ensure proper credit when notifying the Director,
send the documentation to the Director, attn.: NSR Section. [R307-401-18]

SECTION II: PERMITTED EQUIPMENT
The intent is to issue an air quality AO authorizing the project with the following recommended
conditions and that failure to comply with any of the conditions may constitute a violation of the
AO. (New or Modified conditions are indicated as “New” in the Outline Label):

II.A THE APPROVED EQUIPMENT

II.A.1 Ardent Mills, LLC
Wheat Storage and Flour Mill

II.A.2 E-01 Baghouse
Service Area: Elevator, Garner, Scales & Distribution (Grain Handling EU03, Grain Storage
EU04, Grain Loadout Truck EU05, Grain Loadout Rail EU06, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 12,800 ACFM Installed Date: 1968

II.A.3 E-06 Baghouse
Service Area: Elevator Basement & Truck Receiving (Grain Receiving Truck EU01 and Grain
Receiving Rail EU02, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 20,750 ACFM Installed Date: 1979

II.A.4 E-08 Baghouse
Service Area: Mill Feed Load-out Conveyors (Feed Load-Out Truck EU24)
Exhaust Flow Rate: 11,700 ACFM Installed Date: 1971

II.A.5 E-09 Baghouse
Service Area: Grain Load-out System (Grain Handling EU03, Grain Storage EU04, Grain
Loadout Truck EU05, Grain Loadout Rail EU06, Wheat Cleaning 1 EU08)
Exhaust Flow Rate: 2,500 ACFM Installed Date: 1977

II.A.6 E-10 Baghouse
Service Area: Wheat Cleaning System (Color Sort Wheat Cleaning System EU07)
Exhaust Flow Rate: 13,000 ACFM Installed Date: 1971

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 6
II.A.7 E-16 Baghouse
Service Area: Whole Wheat Load-out System (Whole Wheat Storage EU17, Whole Wheat
Load-Out Truck EU18, Whole Wheat Load-Out Rail EU19)
Exhaust Flow Rate: 3,500 ACFM Installed Date: 2014
The baghouse is vented indoors

II.A.8 M-01 Baghouse
Service Area: Flour Mill, Roll Suction (Flour Milling A Mill EU10)
Exhaust Flow Rate: 11,480 ACFM Installed Date: 1958

II.A.9 M-03 Baghouse
Service Area: South Mill Purifiers 1-6 (Flour Milling A Mill EU10)
Exhaust Flow Rate: 9,840 ACFM Installed Date: 1958

II.A.10 M-07 Baghouse
Service Area: General Suction-All Mill Scales, Conveyors, Pin Mill Equipment & Flour Bins
(Flour Milling A Mill EU10, Flour Milling B Mill EU11, Flour Storage EU13,
Packaging/Bulk Loading Truck EU15, Packaging/Bulk Loading Rail EU16)
Exhaust Flow Rate: 20,000 CFM Installed Date: 1955

II.A.11 M-08 Baghouse
Service Area: All Whole Wheat Equipment (Whole Wheat Flour Milling C Mill EU12)
Exhaust is vented internally and not discharged to the atmosphere

II.A.12 M-09 Baghouse
Service Area: Mill Pneumatics System (Flour Milling A Mill EU10)
Exhaust Flow Rate: 17,500 ACFM Installed Date: 1988

II.A.13 M-10 Baghouse
Service Area: Aspirators, Brk Rolls and Mill Legs (Flour Milling B Mill EU11)
Exhaust Flow Rate: 22,036 ACFM Installed Date: 2009

II.A.14 M-11 Baghouse
Service Area: Mill Pneumatics System (Flour Milling B Mill EU11)
Exhaust Flow Rate: 22,036 ACFM Installed Date: 2009

II.A.15 CH-01 Baghouse
Service Area: Grinding Bin, Combinators, 2nd Temper Entoleters and Leg (Wheat Cleaning 2
EU09)
Exhaust Flow Rate: 13,000 CFM Installed Date: 1965

II.A.16 CH-05 Baghouse
Service Area: Wheat Cleaning Equipment (Wheat Cleaning 1 EU08, Screenings Storage
EU20, Feed Storage A Mill EU22)
Exhaust Flow Rate: 23,400 ACFM Installed Date: 1980

II.A.17 CH-07 Baghouse
Service Area: Screenings Grinding (Screening Hammermill EU21)
Exhaust Flow Rate: 1,600 ACFM Installed Date: 1999

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 7
II.A.18 CH-08 Baghouse
Service Area: Wheat Cleaning Equipment (Wheat Cleaning 1 EU08, Feed Storage B Mill
EU23, Organic Bran Storage EU28)
Exhaust Flow Rate: 22,036 ACFM Installed Date: 2009

II.A.19 P-01 Baghouse
Service Area: Bulk-All Truck and Rail Loading Equipment (Packaging/Bulk Loading Truck
EU15, Packaging/Bulk Loading Rail EU16)
Exhaust Flow Rate: 22,036 ACFM Installed Date: 2009

II.A.20 P-06 Baghouse
Service Area: Ingredient Cut-In Equipment (Malt Flour Ingredient Handling EU14A)
Exhaust is vented internally and not discharged to the atmosphere

II.A.21
NEW
P-06B Baghouse - new equipment
Service Area: the malt ingredient storage unit (surge bin) (Malt Ingredient Storage EU14B)
Exhaust Flow Rate: 570 SCFM Installed Date: 2023
The baghouse is vented indoors

II.A.22 P-07 Baghouse
Service Area: Elevator Load/Unload Bin Vent (Food Grade Bran Feed Storage EU26)
Exhaust Flow Rate: 200 ACFM Installed Date: 2002
Exhaust is vented indoors

II.A.23 Millfeed Loadout Equipment
(Feed Loadout Truck EU24 and Feed Load Rail EU25)
Bran Mill Loadout Equipment includes:
1. A conveyor of the type that is designed to raise and lower to the top of the truck,
which will reduce open freefall and choke feed the remainder of the load.
2. A quick opening/closing door system on the entrance to the existing loadout building.

II.A.24 Truck/Rail Grain Receiving Pits
(Grain Receiving Truck EU01/FP01 & Grain Receiving Rail EU02/FP02)
1. Baffles below the grating
2. A quick opening/closing door system on the entrance to the existing receiving
building
3. Aspiration below the baffles to baghouse E-06

SECTION II: SPECIAL PROVISIONS
The intent is to issue an air quality AO authorizing the project with the following recommended
conditions and that failure to comply with any of the conditions may constitute a violation of the
AO. (New or Modified conditions are indicated as “New” in the Outline Label):

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 8
II.B REQUIREMENTS AND LIMITATIONS

II.B.1 The Ogden Flour Mill shall be subject to the following:
II.B.1.a
NEW
The owner/operator shall not allow visible emissions from the following emission points to
exceed the following values:

A. Truck/Railcar unloading station - 5% opacity

B. Railcar loading station - 5% opacity

C. Truck loading station - 10% opacity

D. All baghouse exhaust stacks - 10% opacity

E. All other points - 20% opacity

[R307-401-8]

II.B.1.a.1
NEW
Opacity observations of emissions from stationary sources shall be conducted according to 40
CFR 60, Appendix A, Method 9. [R307-201-3]

II.B.2
NEW
Baghouse Requirements
II.B.2.a
NEW
The owner/operator shall install a manometer or magnehelic pressure gauge to measure the
differential pressure across the fabric filters in each of the following baghouses: E-01, E-06,
E-08, E-09, E-10, M-01, M-03, M-07, M-09, M-10, M-11, CH-01, CH-05, CH-07, CH-08,
and P-01. All exhaust air from the processes shall be routed through their designated
baghouses before being vented to the atmosphere. [R307-401-8]

II.B.2.a.1
NEW
The pressure gauges shall be located such that an inspector/operator can safely read the
indicators at any time. [R307-401-8]

II.B.2.a.2
NEW
The pressure gauges shall measure the pressure drop in 0.5-inch water column increments or
less. [R307-401-8]

II.B.2.b
NEW
During operation of the baghouses, the owner/operator shall maintain the static pressure drop
across the baghouses between 0.5 and 8.0 inches of water column. [R307-401-8]

II.B.2.b.1
NEW
The owner/operator shall record the pressure drop through each baghouse for each day the
controlled processes are in operation. [R307-401-8]

II.B.2.b.2
NEW
The owner/operator shall maintain the following records of the pressure drop readings:

A. Unit identification;

B. Date of reading;

C. Daily static pressure drop readings.

[R307-401-8]

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 9
II.B.2.c
NEW
The owner/operator shall operate, maintain, and calibrate the pressure gauges in accordance
with the manufacturer's instructions/recommendations or replace the gauges. [R307-401-8]

II.B.2.c.1
NEW
The Owner/operator shall keep the following records:

A. Unit identification

B. Dates of pressure gauge calibration or replacement.

[R307-401-8]

II.B.3 All Haul Roads and Fugitive Dust Sources shall be subject to the following:
II.B.3.a
NEW
The owner/operator shall periodically sweep or water spray the in-plant paved haul road to
meet the following visible emission limits:

A. 20% opacity on site, and

B. 10% opacity at the property boundary.

[R307-401, R307-309-5]

II.B.3.a.1
NEW
The owner/operator shall keep records of sweeps and water sprays to include the following:

A. Date of sweeps or water sprays

B. Time of day sweeps or water sprays conducted

The owner/operator may stop sweeps when the paved haul roads are covered with snow, and
may stop water spray when the temperature is below freezing. [R307-401-8]

II.B.3.a.2
NEW
The records shall be kept for all periods when the plant is in operation. [R307-401-8]

II.B.3.a.3
NEW
Visible emission determinations for fugitive dust emissions from haul-road traffic and mobile
equipment in operational areas shall use procedures similar to Method 9. The normal
requirement for observations to be made at 15-second intervals over a six-minute period,
however, shall not apply. Visible emissions shall be measured at the densest point of the
plume but at a point not less than 1/2 vehicle length behind the vehicle and not less than 1/2
the height of the vehicle. [R307-401-8, R307-309]

II.B.3.b The owner/operator shall conduct its operations in such a way to minimize fugitive dust and
fugitive emissions and shall comply with all applicable requirements of R307-309. [R307-
309]

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 10
PERMIT HISTORY

When issued, the approval order shall supersede (if a modification) or will be based on the
following documents:

Supersedes DAQE-AN0109200009-19 dated January 24, 2019
Incorporates Additional information dated June 9, 2023
Incorporates Additional information dated December 6, 2023
Incorporates Additional information dated February 26, 2024
Incorporates Additional information dated April 12, 2024

REVIEWER COMMENTS

1. Comment regarding the new malt ingredient storage (surge bin):
The Surge bin shall be controlled by a baghouse, which vents indoors. Therefore, there are no
emission increases from this modification. [Last updated January 22, 2024]

2. Comment regarding Baghouses M-07, CH-01, E-16, and P-07:

Baghouses Currently Vents Proposed to Vent PM10 Changes PM2.5 Changes

M-07 Indoors Outdoors 0.00 0.00
CH-01 Indoors Outdoors <+0.02 0.01
E-16 Outdoors Indoors <-0.02 -0.01
P-07 Outdoors Indoors 0.00 0.00

Therefore, there are essentially no emission changes as a result of modifications to the baghouses.
[Last updated January 22, 2024]

3.

4

5.

Comment regarding the baghouse pressure drop range in II.B.2.b:
The source requested the pressure drop range be revised from between 1.5 and 6.0 inches of water
column to between 0.5 and 8.0 inches of column. The new range was recommended by the pressure
gauge installer. This change will not affect the control efficiency of the baghouse; therefore, no
emission changes are expected. [Last updated April 18, 2024]

Comment regarding the pressure gauge calibrations in II.B.2.c:
Ardent requested to calibrate the pressure gauges in accordance with the manufacturer’s instructions
and/or recommendations, instead of calibrations on an annual basis. Ardent should be allowed to
calibrate the pressure gauges according to the manufacturer’s instructions/recommendations.
Therefore, this condition is revised accordingly. [Last updated April 18, 2024]

Comment regarding the paved haul road fugitive dust requirements in II.B.3.a:
Ardent is a grain processor. There are paved haul roads on site for haul trucks to transport raw
grains and finished products. Considering the nature of Ardent’s operations and the paved haul
roads, the source would not generate much fugitive dust emissions from the paved haul roads.
Consequently, the Minor NSR Section recommends the recordkeeping requirements for rainfall and
temperature be removed from II.B.3.a.1. The Minor NSR Section also recommends the source stop
sweeps when the snow covers the paved haul roads, and stop water sprays when the temperature is
below freezing. Because the facility is located in the PM2.5 nonattainment area, R307-309 for

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 11

6.
fugitive dust emissions applies. Conditions II.B.3.a and II.B.3.a.3 are revised or added to reflect the
rule requirements. [Last updated May 20, 2024]

Comment regarding Comment regarding Title V Applicability:
Title V of the 1990 Clean Air Act (Title V) applies to the following:

1. Any major source
2. Any source subject to a standard, limitation, or other requirement under Section 111 of the Act,
Standards of Performance for New Stationary Sources;
3. Any source subject to a standard or other requirement under Section 112 of the Act, Hazardous
Air Pollutants.
4. Any Title IV affected source.

This facility is not a major source, a Title IV source, nor subject to NESHAP/NSPS regulations.
Thus, this facility is not subject to Title V. [Last updated January 22, 2024]

Engineer Review N109200010: Ardent Mills, LLC- Ogden Flour Mill
April 18, 2024
Page 12
ACRONYMS
The following lists commonly used acronyms and associated translations as they apply to this
document:
40 CFR Title 40 of the Code of Federal Regulations
AO Approval Order
BACT Best Available Control Technology
CAA Clean Air Act
CAAA Clean Air Act Amendments
CDS Classification Data System (used by EPA to classify sources by size/type)
CEM Continuous emissions monitor
CEMS Continuous emissions monitoring system
CFR Code of Federal Regulations
CMS Continuous monitoring system
CO Carbon monoxide
CO2 Carbon Dioxide
CO2e Carbon Dioxide Equivalent - 40 CFR Part 98, Subpart A, Table A-1
COM Continuous opacity monitor
DAQ/UDAQ Division of Air Quality
DAQE This is a document tracking code for internal UDAQ use
EPA Environmental Protection Agency
FDCP Fugitive dust control plan
GHG Greenhouse Gas(es) - 40 CFR 52.21 (b)(49)(i)
GWP Global Warming Potential - 40 CFR Part 86.1818-12(a)
HAP or HAPs Hazardous air pollutant(s)
ITA Intent to Approve
LB/HR Pounds per hour
LB/YR Pounds per year
MACT Maximum Achievable Control Technology
MMBTU Million British Thermal Units
NAA Nonattainment Area
NAAQS National Ambient Air Quality Standards
NESHAP National Emission Standards for Hazardous Air Pollutants
NOI Notice of Intent
NOx Oxides of nitrogen
NSPS New Source Performance Standard
NSR New Source Review
PM10 Particulate matter less than 10 microns in size
PM2.5 Particulate matter less than 2.5 microns in size
PSD Prevention of Significant Deterioration
PTE Potential to Emit
R307 Rules Series 307
R307-401 Rules Series 307 - Section 401
SO2 Sulfur dioxide
Title IV Title IV of the Clean Air Act
Title V Title V of the Clean Air Act
TPY Tons per year
UAC Utah Administrative Code
VOC Volatile organic compounds

Electronic Submittal (email)

Jason Gauderman
Plant Manager
2780 G Avenue
Ogden, UT 84401

April 12, 2024

Utah Department of Environmental Quality
Division of Air Quality
1950 West 195 North
Salt Lake City, UT 84116

RE: Air Permit Modification – Engineering Review
AO DAQE-AN109200009-19
Add a New Surge Bin and Associated Baghouse

To Mr. Enqiang He,

Ardent Mills is requesting the following edits to the Draft Permit dated March 6, 2024,
drafted by Enqiang HE:

1) II.B.2.b of the draft permit currently states: “During operations of the baghouses,
the owner/operator shall maintain the static pressure drop across the baghouses
between 1.5 and 6.0 inches of water column.” [R307-401-8]. Ardent is requesting
that the inches of water column range be expanded to 0.5” to 8.0”. This increase
will represent what is industry standard operating range for the KICE Baghouses
present at the facility. In addition, KICE has provided an explanation via a letter
(enclosed) that states this operating range is acceptable for adequately controlling
the emissions from the facility emissions sources.

2) II.B.2.c. of the draft permit currently states: “At least once every 12 months, the
owner/operator shall calibrate the pressure gauges in accordance with the
manufacturer’s instructions or replace the gauge” [R307-401-8]. Ardent is
requesting the language within the draft permit be changed to allow for flexibility
of gauge recertification in the event a gauge does not need to be recertified
annually per manufacturer’s specifications/certifiers recommendations. The
requested change is as follows: “The fabric filters shall be equipped with devices to
continuously measure the differential pressure drop across each fabric filter. Each
monitoring device shall be installed, maintained, calibrated, and operated in
accordance with approved procedures which shall include, as a minimum the
manufacturer’s/certifier’s written requirements or recommendations.”

3) II.B.3.a.1 of the draft permit currently states:

The owner/operator shall keep records of sweeps and water sprays to include the
following:

A. Date of sweeps or water sprays
B. Time of day sweeps or water sprays conducted
C. Rainfall received, if any
D. Records of temperature if the temperature is below freezing [R307-401-8]

Ardent does not intend to use water sprays as a control measure for the facility
haul roads. Ardent would prefer, if possible, that all language referencing water
sprays be removed from the permit. If this is not allowable, Ardent is requesting
the change be made as follows:

The owner/operator shall keep records of sweeps and water sprays (if applicable)
to include the following:

A. Date of sweeps or water sprays
B. Time of day sweeps or water sprays conducted

If water sprays are used to reduce haul road emissions, the owner/operator shall
keep records of:

C. Rainfall received, if any
D. Records of temperature if the temperature is below freezing [R307-401-8]”

If you have any questions about our edit request to the Draft Permit, please don’t
hesitate to contact me at [phone] or by email at jason.gauderman@ardentmills.
You may also contact Adam Varo, our Environmental Manager at [phone] or by
email at [e-mail].

Sincerely,

Jason Gauderman
Plant Manager

Enclosure(s): 1

CC: Adam Varo (Ardent Mills, LLC)
Jack Batho (Atlas Technical Consultants)
Mike Freese (Atlas Technical Consultants)
Jeff Hitch (Ardent Mills, LLC)
Jason Gauderman
Ardent Mills
2780 G Avenue
Ogden, UT 84401

April 10, 2024

Thanks for your inquiry on the range of acceptable filter differential pressure operation. Based
on the installation criteria of the filters in Ogden, we suggest an air permit stating an operating
range of 0.5”wc to 8”wc.

[phone]
[e-mail]
5500 N. Mill Heights Dr.
Park City, KS 67219-2358
Regards,
Shane Pritchard, P.E.
Regional Engineering Manager

11117 Mockingbird Drive, Omaha, NE 68137
402.536.0694 | oneatlas.com
June 7, 2023

Alan Humphreys
Utah Dept. of Environmental Quality - Division of Air Quality
State Office Building
195 North 1950 West
Salt Lake City, Utah 84116

SUBJECT: Air Permit Modification
Ardent Mills, LLC
2780 G Avenue; Ogden, UT 84401
Permit #: DAQE-AN109200008-14

Dear Mr. Humphreys:

Atlas Technical Consultants LLC (Atlas) was retained by Ardent Mills, LLC to complete an Air Permit
modification for the above-referenced facility. The modification includes the installation of a surge
bin for malt ingredient storage controlled by a new baghouse. Atlas also reviewed the existing
permit during the completion of the Notice of Intent (NOI). The review identified (4) four items
requiring correction:

 Baghouse E-16 vents indoors and not outdoors,
 Baghouse M-07 vents outdoors and not indoors,
 Baghouse CH01 vents outdoors and not indoors, and
 Baghouse P-07 vents indoors and not outdoors

These corrections are also noted in the attached NOI/application and specifically denoted as red
text in the Process Flow Diagram (page 12) of the application packet. Please make these corrections
during the modification.

Thank you for your consideration and if you have any questions or require further information, you
may email or call me.

Respectfully submitted,

Atlas Technical

Mike Freese
Title: Senior Project Manager
p: [phone]
[e-mail]

Attachments: Notice of Intent and Supporting Documents
Form 1 Date __________________
Notice of Intent (NOI) Application Checklist
Company __________________
Utah Division of Air Quality
New Source Review Section
Source Identification Information [R307-401-5]
1. Company name, mailing address, physical address and telephone number 
2. Company contact (Name, mailing address, and telephone number)
3.Name and contact of person submitting NOI application (if different than 2)
4.Source Universal Transverse Mercator (UTM) coordinates 
5. Source Standard Industrial Classification (SIC) code 
6.Area designation (attainment, maintenance, or nonattainment)
7.Federal/State requirement applicability (NAAQS, NSPS, MACT, SIP, etc.)
8.Source size determination (Major, Minor, PSD)
9. Current Approval Order(s) and/or Title V Permit numbers 
NOI Application Information: [R307-401]










N/A 
N/A 
A.Air quality analysis (air model, met data, background data, source impact analysis) N/A 
1.Detailed description of the project and source process
2.Discussion of fuels, raw materials, and products consumed/produced
3.Description of equipment used in the process and operating schedule
4.Description of changes to the process, production rates, etc.
5.Site plan of source with building dimensions, stack parameters, etc.
6.Best Available Control Technology (BACT) Analysis [R307-401-8]
A.BACT analysis for all new and modified equipment
7.Emissions Related Information: [R307-401-2(b)]
A.Emission calculations for each new/modified unit and site-wide
(Include PM10, PM2.5, NOx, SO2, CO, VOCs, HAPs, and GHGs)
B.References/assumptions, SDS, for each calculation and pollutant
C.All speciated HAP emissions (list in lbs/hr)
8.Emissions Impact Analysis – Approved Modeling Protocol [R307-410]
A.Composition and physical characteristics of effluent
(emission rates, temperature, volume, pollutant types and concentrations)
9.Nonattainment/Maintenance Areas – Major NSR/Minor (offsetting only) [R307-403]
A.NAAQS demonstration, Lowest Achievable Emission Rate, Offset requirements
B.Alternative site analysis, Major source ownership compliance certification
10.Major Sources in Attainment or Unclassified Areas (PSD) [R307-405, R307-406]
B.Visibility impact analysis, Class I area impact
11.Signature on Application
N/A 
Note: The Division of Air Quality will not accept documents containing confidential information or data.
Documents containing confidential information will be returned to the Source submitting the application.
1 of 1
Form 2 Date ____________
Company Information/Notice of Intent (NOI)
Utah Division of Air Quality
New Source Review Section
Application for: □ Initial Approval Order □Approval Order Modification
General Owner and Source Information
1.Company name and mailing address:
____________________________
____________________________
____________________________
Phone No.: ( )
Fax No.: ( )
2.Company** contact for environmental matters:
____________________________
Phone no.: ( )
Email: _______________________
** Company contact only; consultant or independent contractor contact
information can be provided in a cover letter
3.Source name and physical address (if different from
above):____________________________
____________________________
____________________________
Phone no.: ( )
Fax no.: ( )
4.Source Property Universal Transverse Mercator
coordinates (UTM), including System and Datum:
UTM:_________________________
X:____________________________
Y:____________________________
5.The Source is located in:__________________ County 6.Standard Industrial Classification Code (SIC)
__ __ __ __
7.If request for modification, AO# to be modified: DAQE #__________________ DATED: ____/____/____
8.Brief (50 words or less) description of process.
Electronic NOI
9.A complete and accurate electronic NOI submitted to DAQ Permitting Mangers Jon Black ([e-mail]) or Alan
Humpherys ([e-mail]) can expedite review process. Please mark application type.
Hard Copy Submittal Electronic Copy Submittal □ Both
Authorization/Signature
I hereby certify that the information and data submitted in and with this application is completely true, accurate and
complete, based on reasonable inquiry made by me and to the best of my knowledge and belief.
Signature: Title:
_______________________________________
Name (Type or print)
Telephone Number:
( )
Email:
Date:
Page 1 of 1
Form 4 Company____________________________
Project Information Site ______________________________

Utah Division of Air Quality
New Source Review Section
Process Data - For Modification/Amendment ONLY
1. Permit Number_______________________________
If submitting a new permit, then use Form 3
Requested Changes
2. Name of process to be modified/added:
_______________________________

End product of this process:

_______________________________

3. Permit Change Type: New Increase*

Equipment

Process

Condition Change ____________________

Other ______________________________

Other ______________________________

Other ______________________________

4. Does new emission unit affect existing
permitted process limits?

Yes No
5. Condition(s) Changing:

6. Description of Permit/Process Change**

7. New or modified materials and quantities used in process. **
Material Quantity Annually

8. New or modified process emitting units **

Emitting Unit(s)

Capacity(s)

Manufacture Date(s)

*If the permit being modified does not include CO2e or PM2.5, the emissions need to be calculated and submitted to DAQ, which may result in an
emissions increase and a public comment period.
**If additional space is required, please generate a document to accommodate and attach to form.

Page 1 of 1
Company___________________________
Site _____________________________
Form 5
Emissions Information
Criteria/GHGs/ HAP’s
Utah Division of Air Quality
New Source Review Section
Potential to Emit* Criteria Pollutants & GHGs
Criteria Pollutants Permitted Emissions
(tons/yr)
Emissions Increases
(tons/yr)
Proposed Emissions
(tons/yr)
PM10 Total
PM10 Fugitive
PM2.5
NOx
SO2
CO
VOC
VOC Fugitive
NH3
Greenhouse Gases CO2e CO2e CO2e
CO2
CH4
N2O
HFCs
PFCs
SF6
Total CO2e
*Potential to emit to include pollution control equipment as defined by R307-401-2.
Hazardous Air Pollutants** (**Defined in Section 112(b) of the Clean Air Act )
Hazardous Air
Pollutant***
Permitted Emissions
(tons/yr)
Emission Increase
(tons/yr)
Proposed
Emission (tons/yr)
Emission Increase
(lbs/hr)
Total HAP
*** Use additional sheets for pollutants if needed
Utah Division of Air Quality
New Source Review Section Company _______________________
Site/Source _____________________
Form 10 Date __________________________
Fabric Filters (Baghouses)

Baghouse Description
1. Briefly describe the process controlled by this baghouse:

Gas Stream Characteristics
2. Flow Rate (acfm):

4. Particulate Loading (grain/scf)
Design Max

Average
Expected

3. Water Vapor Content of Effluent
Stream (lb. water/lb. dry air)
Inlet Outlet
5. Pressure Drop (inches H2O)
High __________ Low _________
6. Gas Stream Temperature (°F): 7. Fan Requirements (hp) (ft3/min)

Equipment Information and Filter Characteristics
8. Manufacturer and Model Number:
10. Bag Diameter
(in.)
11. Bag Length (ft.) 12. Number of Bags: 13. Stack Height
___________ feet
Stack Inside Diameter
___________ inches
9. Bag Material:
□ Nomex nylon
□ Polyester
□ Acrylics
□ Fiber glass
□ Cotton
□ Teflon
□ ___________
14. Filtering
Efficiency
Rating:

_________%
15. Air to Cloth
Ratio:

______: 1
16. Hours of Operation:
Max Per day ________
Max Per year _______
17. Cleaning Mechanism:
□ Reverse Air □ Shaker
□ Pulse Jet □ Other:
______________________
Emissions Calculations (PTE)
18. Calculated emissions for this device
PM10 ___________Lbs/hr___________ Tons/yr PM2.5 ___________Lbs/hr___________ Tons/yr
NOx ____________Lbs/hr___________ Tons/yr SOx ____________Lbs/hr___________ Tons/yr
CO ____________Lbs/hr___________ Tons/yr VOC ___________Lbs/hr___________ Tons/yr
HAPs___________Lbs/hr (speciate)____________Tons/yr (speciate)
Submit calculations as an appendix.
Page 1 of 2
Page 2 of 2

Instructions - Form 10 Fabric Filters (Baghouses)

NOTE: 1. Submit this form in conjunction with Form 1 and Form 2.

2. Call the Division of Air Quality (DAQ) at [phone] if you have problems or questions in
filling out this form. Ask to speak with a New Source Review engineer. We will be glad to
help!

1. Describe the process equipment that the filter controls, what product is being controlled, particle size
data (if available), i.e., cement silo, grain silo, nuisance dust in work place, process control with high
dust potential, etc.
2. The maximum and design exhaust gas flow rates through the filter control device in actual cubic feet
per minute (ACFM). Check literature or call the sales agent.
3. The water/moisture content of the gas stream going through the filter.
4. The amount of particulate in the gas stream going into the filter and the amount coming out if available.
Outlet default value = 0.016 grains PM10/dscf.
5. The pressure drop range across the system. Usually given in the literature in inches of water.
6. The temperature of the gas stream entering the filter system in degrees Fahrenheit.
7. The horse power of the fan used to move the gas stream and/or the flow rate of the fan in ft3/min.
8. Name of the manufacturer of the filter equipment and the model number if available.
9. Check the type of filter bag material or fill in the blank. Check literature or call the sales agent.
10. The diameter of the bags in the system. Check literature or call the sales agent.
11. The length of the bags in the system. Check literature or call the sales agent.
12. The number of bags. Check literature or call the sales agent.
13. The height to the top of the stack from ground level and the stack inside diameter.
14. The filtering efficiency rating that the manufacturer quotes. Check literature or call the sales agent.
15. The ratio of the flow rate of air to the cloth area (A/C).
16. The number of hours that the process equipment is in operation, maximum per day and per year.
17. The way in which the filters bags are cleaned. Check the appropriate box.
18. Supply calculations for all criteria pollutants and HAPs. Use AP42 or Manufacturers data to complete
your calculations.

U:\aq\ENGINEER\GENERIC\Forms 2010\Form10 Baghouses.doc
Revised 12/20/10

11117 Mockingbird Drive
Omaha, NE 68137
PROJECT NO: 204EM05644
DESIGNED BY: Atlas SCALE: 1”~150’
DRAWN BY: MAF DATE: 6/7/2023 FILE: Fac. Site Plan
REVIEWED BY: MAF
SITE PLAN
Ardent Mills – Ogden Mill
2780 G Avenue
Ogden, Utah 84401

Warehouse
Ra
i
l

B
u
l
k

L
o
a
d
o
u
t

&
Re
c
e
i
v
i
n
g

Warehouse
Silos Silos Silos
Office
Warehouse
Retention
Basin #1

West 27th Street

G
A
v
e
n
e

Scale
Paved
Parking
Paved
Parking
Paved
Parking
Property
Line
Fence
Surge Bin
Baghouse
(vents indoors)
Photograph Log
Ardent Mills, LLC
2780 G Avenue
Ogden, Utah 84401

Project No. 204EM05644 Atlas

Photo 1: Baghouse Photo 2: Baghouse Nameplate

Photo 3: Surge Bin

P-06 filter dust collection
feeds back to product line.
Dust collection feeds into surge bin
which then goes to ingredient
micro feeder to add to pack or bulk
transfer system
REVDWG NOSIZE
TITLE
KICE INDUSTRIES, INC.
5500 MILL HEIGHTS DR, WICHITA, KS 67219 USA
DRAWN BY:
CHECKED BY:
COMMENTS:
DO NOT SCALE
CUSTOMER:ARDENT MILLS
LN NO.: 1
ORDER NO.: 371354
UNLESS OTHERWISE SPECIFIED
RELIEF VALVE
AIR TANK
CONNECTION
1" NPT COUPLING
44 5/8"
44 1/4" 22 3/4"
67"
28 11/16"
10 3/4"
17 15/16"
28 3/16"
ISOMETRIC REFERENCE VIEW
4 1/8" X 7 5/16"
AIR OUTLET
w/ DAMPER
& BIRD SCREEN
45 1/2"
21 1/2"
44"
20"
5"
TYP.
4"
TYP.
7/16" THRU
TYP.
GEN NOTES:
1. NO PAINT ON PRODUCT CONTACT SURFACES (ESS-5100).
2. CAULKING REQ'D AT FLANGE CONNECTION - FIELD USE ONLY.
3. FILTER PERFORMANCE SPECIFICATIONS:
AIR VOLUME- 570 SCFM
MEDIA AREA- 82.4 SQ. FT.
AIR CLOTH RATIO- 6.92:1
CLEANING AIR- 2 CFM @ 80-100 PSIG
INTERSTITIAL VELOCITY- 147 FPM
4. FAN PERFORMANCE:
- AIR VOLUME: 570 SCFM
- STATIC: 6 IN. W.C.
- SPEED: 3600 RPM
- MOTOR: 3 HP, 230/460/3/60, 182TC FRAME, TEFC
INTERCONNECTING DUCTING TO BE SUPPORTED BY OTHERS.
6. CONTROLS ARE TO BE 120VAC MOUNTED IN A NEMA4 CONTROL BOX.
SOLENOID VALVES TO OPERATE THE BLAST VALVES ARE NEMA4, 120VAC.
7. CONTINUOUS EXTERIOR WELDS ONLY.
8. FILTER SUPPORTED IN THE FIELD BY OTHERS.
REVISIONS
REV DESCRIPTION REV BY DATE
1-0 RELEASE MDC 4/14/2022
2-0 REMOVED INTERIOR WELD FROM GEN NOTE 7 MDC 4/28/2022
BILL OF MATERIALS
ITEM PART NO.QTY.DESCRIPTION WEIGHT
1 4-42782 1 VC2x4x28, KF7W8 458.5
4/29/2022HJW
4/29/2022MDC
FINISH:
MATERIAL:
ALL DIM ARE IN INCHESALL RIGHT ANGLES TO BE 90°TOLERANCES:FRACTIONAL: ± 1/32"ANGULAR: ± 1°TWO PLACE DECIMAL: ± .03THREE PLACE DECIMAL: ± .003FOUR PLACE DECIMAL: ± .0005
INTERPRET DIM AND TOL PER ASME Y14.5M-2004
VC2x4x28, KF7W8
C 4-42782C
SCALE: 1:12 WEIGHT: 458.5LBS.SHEET 1 OF 1
D
C
B
A
D
C
B
A
4 3 2 1
4 3 2 1
2-0
THESE DRAWINGS, THE INFORMATION EMBODIED IN THESE DRAWINGS, AND ANY DEVICE, NOTES, ABSTRACTS, WORKING PAPERS, OR OTHER THINGS PREPARED FROM OR INCORPORATING THEM (THE "INFORMATION") ARE CONFIDENTIAL AND PROPRIETARY AND OWNED BY KICE INDUSTRIES, INC. ("KICE"). BY RECIPIENT OF THE INFORMATION, RECIPIENT AGREE TO COMPLY WITH ANY WRITTEN CONFIDENTIALITY AGREEMENT BETWEEN THE PARTIES OR TO USE THE INFORMATION EXCLUSIVELY IN ASSOCIATION WITH KICE'S SERVICES, NOT DISCLOSE THE INFORMATION TO ANY OTHER PERSON, AND USE REASONABLE EFFORTS TO SAFEGUARD THEINFORMATION. © 2005 KICE INDUSTRIES, INC.
Standard features
 The integrated fan and cleaning system makes installation, operation and
maintenance easy.
 With various cartridge configurations and lengths available, the compact filter can
handle a wide range of applications, materials and air volumes.
 Tool-free cartridge replacement minimizes maintenance and downtime.
 Materials of construction include carbon or stainless steel to meet specific
application requirements.
 Accessories include mounted transitions and mounted starters for fans.
Model s
VC2x2x2040
Cartridge length 21 in
Number of pleats 40
Cloth area per cartridge 7.8 sq ft
Number of cartridges 4
Total cloth area 31.2 sq ft
CFM 200
Air-to-cloth ratio 6.41
VC2x2x2840
Cartridge length 27.6 in
Pleats 40
Cloth area per cartridge 10.3 sq ft
Cartridges 4
Total cloth area 41.2 sq ft
CFM 360
Air-to-cloth ratio 8.74
VC2x4x2840
Cartridge length 27.6 in
Pleats 40
Cloth area per cartridge 10.3 sq ft
Cartridges 8
Total cloth area 82.4 sq ft
CFM 570
Air-to-cloth ratio 6.92
VC2x4x4040
Cartridge length 40.7 in
Pleats 40
Cloth area per cartridge 15.5 sq ft
Cartridges 8
Total cloth area 124 sq ft
CFM 900
Air-to-cloth ratio 7.26

EU Specifications
Line Item #
(not on flow
diagram)
EU #EP #(s)CE #s
(from permit)
Capture
Efficiency Emission Unit (EU) Name Construction
Permit #
Date
Permit
Revised
Raw
Material
Maximum
Hourly Design
Rate (tons)
SCC Name(s)SCC #(s)Notes
1 EU 01 EP 01 II.A.3, E-06 0.6 Grain Receiving Truck Grain 150.00
Grain Receiving:
Straight Truck
Hopper Truck
30200551
30200552
Most receiving from hopper
trucks, occasionally from straight
trucks
2 EU 01 FP 01 NA 0.4 Grain Receiving Truck Grain 150.00
Grain Receiving:
Straight Truck
Hopper Truck
30200551
30200552
Most receiving from hopper
trucks, occasionally from straight
trucks
3 EU 02 EP 01 II.A.3, E-06 0.6 Grain Receiving Rail Grain 150.00 Grain Receiving
Railcar 30200553
4 EU 02 FP 02 NA 0.4 Grain Receiving Rail Grain 150.00 Grain Receiving
Railcar 30200553
5 EU 03 II.A.2, E-01
II.A.5, E-09 1 Grain Handling Grain 300.00 Grain Handling 30200530
6 EU 04 II.A.2, E-01
II.A.5, E-09 1 Grain Storage Grain 300.00 Storage Bin 30200540
7 EU 05 II.A.2, E-01
II.A.5, E-09 1 Grain Load-Out Truck Grain 5.00 Grain Shipping Truck 30200560
8 EU 06 II.A.2, E-01
II.A.5, E-09 0.9 Grain Load-Out Rail Grain 100.00 Grain Shipping Railcar 30200563
9 EU 06 FP 03 NA 0.1 Grain Load-Out Rail Grain 100.00 Grain Shipping Railcar 30200563
10 EU 07 EP 03 II.A.6, E-10 1 Color Sort Wheat Cleaning System Grain 5.00 Grain Cleaning 30200503
11 EU 08 EP 02
EP 04
EP 05
II.A.2, E-01
II.A.5, E-09
II.A.3, E-06
II.A.16, CH-05
II.A.18, CH-08
1 Wheat Cleaning 1 Grain 52.00 Cleaning House
Separators 30200733
12 EU 09 EP 06 II.A.15, CH-01 1 Wheat Cleaning 2 Grain 32.00 Cleaning House
Separators 30200733
13 EU 10
EP 07
EP 08
EP 09
EP 12
II.A.8, M-01
II.A.9, M-03
II.A.12, M-09
II.A.10, M-07
1 Flour Milling A Mill Grain 32.00 Wheat Milling 30200734
14 EU 11
EP 10
EP 11
EP 12
II.A.13, M-10
II.A.14, M-11
II.A.10, M-07
1 Flour Milling B Mill Grain 20.00 Wheat Milling 30200734
15 EU 12 EP 15 II.A.11, M-08 1 Whole Wheat Flour Milling C Mill Grain 2.60 Wheat Milling 30200734
16 EU 13 EP 12 II.A.10, M-07 1 Flour Storage Flour 32.25 Storage Bin 30200540
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
17 EU
14A EP 13A II.A.20, P-06 1 Malt Flour Ingredient Handling Malt 2.00 Grain Handling 30200530
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
18 EU
14B EP 13B II.A.20B P-06B 1 Malt Ingredient Storage Malt 5.00 Storage Bin 30200540
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
19 EU 15 EP 12
EP 14
II.A.10, M-07
II.A.19, P-01 1 Packaging/Bulk Loading Truck Flour 65.00 Grain Shipping Truck 30200560
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
20 EU 16 EP 12
EP 14
II.A.10, M-07
II.A.19, P-01 1 Packaging/Bulk Loading Rail Flour 33.00 Grain Shipping Railcar 30200563
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
21 EU 17 EP 16 II.A.7, E-16 1 Whole Wheat Storage Flour 12.15 Storage Bin 30200540
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
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EP 02
EU Specifications
Line Item #
(not on flow
diagram)
EU #EP #(s)CE #s
(from permit)
Capture
Efficiency Emission Unit (EU) Name Construction
Permit #
Date
Permit
Revised
Raw
Material
Maximum
Hourly Design
Rate (tons)
SCC Name(s)SCC #(s)Notes
22 EU 18 EP 16 II.A.7, E-16 1 Whole Wheat Load-Out Truck Flour 25.00 Grain Shipping Truck 30200560
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
23 EU 19 EP 16 II.A.7, E-17 0.9 Whole Wheat Load-Out Rail Flour 25.00 Grain Shipping Railcar 30200563
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
24 EU 19 FP 04 NA 0.1 Whole Wheat Load-Out Rail Flour 25.00 Grain Shipping Railcar 30200563
Emission factors used for flour
storage are half of those in AP-
42 for grain storage
25 EU 20 EP 04 II.A.16, CH-05 1 Screenings Storage Feed 0.50 Storage Bin 30200540
26 EU 21 EP 17 II.A.17, CH-07 1 Screenings Hammermill Feed 10.00 Grain Milling
Hammermill 30200817
27 EU 22 EP 04 II.A.16, CH-05 1 Feed Storage A Mill Feed 8.00 Storage Bin 30200540
28 EU 23 EP 05 II.A.18, CH-08 1 Feed Storage B Mill Feed 4.00 Storage Bin 30200540
29 EU 24 EP 18 II.A.4, E-08 0.6 Feed Load-Out Truck Feed 32.00 Feed Shipping 30200803
30 EU 24 FP 05 NA 0.4 Feed Load-Out Truck Feed 32.00 Feed Shipping 30200803
31 EU 25 FP 06 NA 1 Feed Load-Out Rail Feed 18.00 Feed Shipping 30200803
32 EU 26 EP 19 II.A.21, P-07 1 Food Grade Bran Feed Storage Feed 4.00 Storage Bin 30200540
Emission factors used for bran
storage are half of those in AP-
42 for grain storage
33 EU 27 FP 07 NA 1 Food Grade Bran Loading Rail Feed 50.00 Feed Shipping 30200803
34 EU 28 EP 05 II.A.18, CH-08 1 Organic Bran Storage Feed 4.00 Storage Bin 30200540
Emission factors used for bran
storage are half of those in AP-
42 for grain storage
35 EU 29 FP 08 NA 1 Organic Bran Loading Rail Feed 50.00 Feed Shipping 30200803
Emission point vents indoors
Potential Emissions
Line Item #
(not on flow
diagram)
EU #EP #(s)CE #s
(from permit)
Capture
Efficiency Emission Unit (EU) Name Raw
Material
Maximum
Hourly Design
Rate (tons)
Unlimited
Hours/Year
Baghouse
PM
Baghouse
PM10
Baghouse
PM2.5
PM EF PM10 EF PM2.5 EF PM PM10 PM2.5 PM PM10 PM2.5
1 EU 01 EP 01 II.A.3, E-06 0.6 Grain Receiving Truck Grain 150 8760.00 0.001000 0.010000 0.020000 0.0713 0.0206 0.0035 46.81 13.53 2.28 0.03 0.08 0.03
2 EU 01 FP 01 NA 0.4 Grain Receiving Truck Grain 150 8760.00 1.000000 1.000000 1.000000 0.0713 0.0206 0.0035 46.81 13.53 2.28 18.72 5.41 0.91
3 EU 02 EP 01 II.A.3, E-06 0.6 Grain Receiving Rail Grain 150 8760.00 0.001000 0.010000 0.020000 0.0320 0.0078 0.0013 21.02 5.12 0.85 0.01 0.03 0.01
4 EU 02 FP 02 NA 0.4 Grain Receiving Rail Grain 150 8760.00 1.000000 1.000000 1.000000 0.0320 0.0078 0.0013 21.02 5.12 0.85 8.41 2.05 0.34
5 EU 03 II.A.2, E-01
II.A.5, E-09 1 Grain Handling Grain 300 8760.00 0.000001 0.000100 0.000400 0.0610 0.0340 0.0058 80.15 44.68 7.62 0.00 0.00 0.00
6 EU 04 II.A.2, E-01
II.A.5, E-09 1 Grain Storage Grain 300 8760.00 0.000001 0.000100 0.000400 0.0250 0.0063 0.0011 32.85 8.28 1.45 0.00 0.00 0.00
7 EU 05 II.A.2, E-01
II.A.5, E-09 1 Grain Load-Out Truck Grain 5 8760.00 0.000001 0.000100 0.000400 0.0860 0.0290 0.0049 1.88 0.64 0.11 0.00 0.00 0.00
8 EU 06 II.A.2, E-01
II.A.5, E-09 0.9 Grain Load-Out Rail Grain 100 8760.00 0.000001 0.000100 0.000400 0.0270 0.0022 0.0004 11.83 0.96 0.16 0.00 0.00 0.00
9 EU 06 FP 03 NA 0.1 Grain Load-Out Rail Grain 100 8760.00 1.000000 1.000000 1.000000 0.0270 0.0022 0.0004 11.83 0.96 0.16 1.18 0.10 0.02
10 EU 07 EP 03 II.A.6, E-10 1 Color Sort Wheat Cleaning System Grain 5 8760.00 0.001000 0.010000 0.020000 0.3000 0.0380 0.0064 6.57 0.83 0.14 0.01 0.01 0.00
11 EU 08 EP 02
EP 04
EP 05
II.A.2, E-01
II.A.5, E-09
II.A.3, E-06
II.A.16, CH-05
II.A.18, CH-08
1 Wheat Cleaning 1 Grain 52 8760.00 0.000001 0.000100 0.000400 0.0480 0.0120 0.0020 10.93 2.73 0.46 0.00 0.00 0.00
12 EU 09 EP 06 II.A.15, CH-01 1 Wheat Cleaning 2 Grain 32 8760.00 0.001000 0.010000 0.020000 0.0480 0.0120 0.0020 6.73 1.68 0.29 0.01 0.02 0.01
13 EU 10
EP 07
EP 08
EP 09
EP 12
II.A.8, M-01
II.A.9, M-03
II.A.12, M-09
II.A.10, M-07
1 Flour Milling A Mill Grain 32 8760.00 0.001000 0.010000 0.020000 70.0000 35.0000 5.9500 9811.20 4905.60 833.95 9.81 49.06 16.68
14 EU 11
EP 10
EP 11
EP 12
II.A.13, M-10
II.A.14, M-11
II.A.10, M-07
1 Flour Milling B Mill Grain 20 8760.00 0.001000 0.010000 0.020000 70.0000 35.0000 5.9500 6132.00 3066.00 521.22 6.13 30.66 10.42
15 EU 12 EP 15 II.A.11, M-08 1 Whole Wheat Flour Milling C Mill Grain 3 8760.00 0.001000 0.010000 0.020000 70.0000 35.0000 5.9500 797.16 398.58 67.76 0.80 3.99 1.36
16 EU 13 EP 12 II.A.10, M-07 1 Flour Storage Flour 32 8760.00 0.001000 0.010000 0.020000 0.0125 0.0032 0.0006 1.77 0.44 0.08 0.00 0.00 0.00
17 EU 14A EP 13A II.A.20, P-06 1 Malt Flour Ingredient Handling Malt 2 8760.00 0.001000 0.010000 0.020000 0.0305 0.0170 0.0029 0.27 0.15 0.03 0.00 0.00 0.00
18 EU 14B EP 13B II.A.20B, P-06B 1 Malt Ingredient Storage Flour 5 8760.00 0.001000 0.010000 0.020000 0.0125 0.0032 0.0006 0.27 0.07 0.01 0.0003 0.0007 0.0003
19 EU 15 EP 12
EP 14
II.A.10, M-07
II.A.19, P-01 1 Packaging/Bulk Loading Truck Flour 65 8760.00 0.001000 0.010000 0.020000 0.0430 0.0145 0.0025 12.24 4.13 0.70 0.01 0.04 0.01
20 EU 16 EP 12
EP 14
II.A.10, M-07
II.A.19, P-01 1 Packaging/Bulk Loading Rail Flour 33 8760.00 0.001000 0.010000 0.020000 0.0135 0.0011 0.0002 1.95 0.16 0.03 0.00 0.00 0.00
21 EU 17 EP 16 II.A.7, E-16 1 Whole Wheat Storage Flour 12 8760.00 0.001000 0.010000 0.020000 0.0125 0.0032 0.0006 0.67 0.17 0.03 0.00 0.00 0.00
22 EU 18 EP 16 II.A.7, E-16 1 Whole Wheat Load-Out Truck Flour 25 8760.00 0.001000 0.010000 0.020000 0.0430 0.0145 0.0025 4.71 1.59 0.27 0.00 0.02 0.01
23 EU 19 EP 16 II.A.7, E-17 0.9 Whole Wheat Load-Out Rail Flour 25 8760.00 0.001000 0.010000 0.020000 0.0135 0.0011 0.0002 1.48 0.12 0.02 0.00 0.00 0.00
24 EU 19 FP 04 NA 0.1 Whole Wheat Load-Out Rail Flour 25 8760.00 1.000000 1.000000 1.000000 0.0135 0.0011 0.0002 1.48 0.12 0.02 0.15 0.01 0.00
25 EU 20 EP 04 II.A.16, CH-05 1 Screenings Storage Feed 1 8760.00 0.001000 0.010000 0.020000 0.0250 0.0063 0.0011 0.05 0.01 0.00 0.00 0.00 0.00
26 EU 21 EP 17 II.A.17, CH-07 1 Screenings Hammermill Feed 10 8760.00 0.001000 0.010000 0.020000 0.2680 0.0670 0.0114 11.74 2.93 0.50 0.01 0.03 0.01
27 EU 22 EP 04 II.A.16, CH-05 1 Feed Storage A Mill Feed 8 8760.00 0.001000 0.010000 0.020000 0.0250 0.0063 0.0011 0.88 0.22 0.04 0.00 0.00 0.00
28 EU 23 EP 05 II.A.18, CH-08 1 Feed Storage B Mill Feed 4 8760.00 0.001000 0.010000 0.020000 0.0250 0.0063 0.0011 0.44 0.11 0.02 0.00 0.00 0.00
29 EU 24 EP 18 II.A.4, E-08 0.6 Feed Load-Out Truck Feed 32 8760.00 0.001000 0.010000 0.020000 0.0033 0.0008 0.0001 0.46 0.11 0.02 0.00 0.00 0.00
30 EU 24 FP 05 NA 0.4 Feed Load-Out Truck Feed 32 8760.00 1.000000 1.000000 1.000000 0.0033 0.0008 0.0001 0.46 0.11 0.02 0.19 0.04 0.01
31 EU 25 FP 06 NA 1 Feed Load-Out Rail Feed 18 8760.00 1.000000 1.000000 1.000000 0.0033 0.0008 0.0001 0.26 0.06 0.01 0.26 0.06 0.01
32 EU 26 EP 19 II.A.21, P-07 1 Food Grade Bran Feed Storage Feed 4 8760.00 0.001000 0.010000 0.020000 0.0125 0.0032 0.0006 0.22 0.06 0.01 0.00 0.00 0.00
33 EU 27 FP 07 NA 1 Food Grade Bran Loading Rail Feed 50 8760.00 1.000000 1.000000 1.000000 0.0033 0.0008 0.0001 0.72 0.18 0.03 0.72 0.18 0.03
34 EU 28 EP 05 II.A.18, CH-08 1 Organic Bran Storage Feed 4 8760.00 0.001000 0.010000 0.020000 0.0125 0.0032 0.0006 0.22 0.06 0.01 0.00 0.00 0.00
35 EU 29 FP 08 NA 1 Organic Bran Loading Rail Feed 50 8760.00 1.000000 1.000000 1.000000 0.0033 0.0008 0.0001 0.72 0.18 0.03 0.72 0.18 0.03
83.30 20.26 3.40 30.35 8.03 1.35
16,191.72 8,058.22 1,369.93 16.02 79.93 27.17
16,275.02 8,078.48 1,373.33 46.37 87.96 28.52
804.78 400.74 68.13 0.80 4.01 1.37
17,079.80 8,479.22 1,441.46 47.17 91.97 29.89
(1) Control efficiencies based on consultant expertise and number of baghouses connected to process. See Reference Table 1 for details. Coefficients = 1 - Decimal % Efficiency
(2) See Emission Factors tab for details about emission factor selection and calculation
Emission point vents indoors
EP 02
Indoor Point Source Totals
Fugitive Source Totals
Outdoor Point Source Totals
Fugitive and Outdoor Point Source
Totals
Emission Factors (lbs/ton)(2)Potential Emissions (tons/year):
Uncontrolled
Potential Emissions (tons/year):
Controlled
All Totals
Baghouse Control Efficiencies(1)
6/14/23, 8:30 PM State of Utah Mail - NOI Received from Ardent Mills, LLC N109200010
https://mail.google.com/mail/u/0/?ik=20ff41d2e4&view=pt&search=all&permmsgid=msg-f:1768245916969955234&simpl=msg-f:1768245916969955234 1/3
Enqiang He <[e-mail]>
NOI Received from Ardent Mills, LLC N109200010
Mike Freese <[e-mail]>Fri, Jun 9, 2023 at 11:11 AM
To: Enqiang He <[e-mail]>
Cc: Jack Batho <[e-mail]>, Jason Gauderman <[e-mail]>, Alan Humpherys
<[e-mail]>
Thanks Engiang He,

See answers to your questions below in red text in your email. When I spoke with Alan prior to completing the application
and specifically letting him know about the indoor and outdoor vent sources, he informed me that we would just need to
include the corrected information in the cover letter as I did. I also recalculated indoor and outdoor emissions based on
current conditions and is on the last page of the application. The potential emissions from these 4 sources are:

M-07 - 0.00 tpy
CH-02 – <0.02 tpy
E-16 – <0.02 tpy
P-07 - 0.00 tpy

So essentially no significant changes from indoor and outdoor emissions and they nearly balance each other out.

Mike Freese
Sr. Project Manager
O: 515.981.3216 C: 515.371.1409

From: Enqiang He <[e-mail]>
Sent: Thursday, June 8, 2023 4:57 PM
To: Mike Freese <[e-mail]>
Subject: [EXTERNAL] NOI Received from Ardent Mills, LLC N109200010

[External Email] This email originated from outside of the Atlas mail system. Please use caution when opening
attachments.
6/14/23, 8:30 PM State of Utah Mail - NOI Received from Ardent Mills, LLC N109200010
https://mail.google.com/mail/u/0/?ik=20ff41d2e4&view=pt&search=all&permmsgid=msg-f:1768245916969955234&simpl=msg-f:1768245916969955234 2/3

Hello Mike,

The Division of Air Quality has received your NOI submitted for
Ardent Mills, LLC. I have been assigned to review this project.
Upon an administrative review, I had the following questions:

1. Baghouses M-07 and CH01.
Were these two baghouses permitted to vent indoors or outdoors
when they were initially permitted? I do not know since our
company did not do the original or any subsequent applications
and I do not have records of those applications. I made these
statements based on information in the current permit that
specifically states; “Exhaust is vented internally and not
discharged to the atmosphere.” Please look at the prior
applications and let us know, but the permit says they vent
indoors. If they were initially permitted to vent indoors, and now
they will vent outdoors, then you need to add emissions from the
two baghouses to the sitewide totals. If these baghouses were
initially permitted outdoors, then their emissions have been
accounted for; therefore, we just need to change the related
conditions in the AO to reflect it. Please refer to the last page of
the application “Potential Emissions”. You will see that I did an
itemization of current outdoor and indoor point sources potential
emissions.

2. Baghouses E-16 and P-07.
Were these two baghouses initially permitted to vent indoors or
outdoors? Same answer as above except no statement in the
permit indicating they vent indoors. If they were initially permitted
to vent indoors, then we just need to change the related
6/14/23, 8:30 PM State of Utah Mail - NOI Received from Ardent Mills, LLC N109200010
https://mail.google.com/mail/u/0/?ik=20ff41d2e4&view=pt&search=all&permmsgid=msg-f:1768245916969955234&simpl=msg-f:1768245916969955234 3/3
conditions in the AO to reflect it. However, if they were initially
permitted to vent outdoors, and now they will vent indoors, then
you need to remove the emissions from the baghouses from the
sitewide totals. Same comment as above and note that there is a
line item for outdoor fugitive and outdoor point sources.

Please provide the above requested information within two weeks
from today. I will need information from you to provide the
information you want. Either all prior applications or either you
look at the applications to let us know the answers whether they
were vented indoors or outdoors. Thanks for your help.

EQ He, CPM
Permitting Engineer, Minor NSR Section, Permitting Branch |
Division of Air Quality
1950 West 195 North, Salt Lake City, UT 84116
Phone: [phone]
[e-mail]

This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and/or confidential.
If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any
use and/or dissemination of any of this communication is strictly prohibited. If you have received this communication in error, notify the sender
immediately by return email and delete the message and any attachments from your system.
Ardent Mills Ogden NOI Air Permit Modification.pdf
3923K
1/22/24, 9:54 PM State of Utah Mail - NOI Received from Ardent Mills, LLC N109200010
https://mail.google.com/mail/u/1/?ik=20ff41d2e4&view=pt&search=all&permmsgid=msg-f:1784548149255188051&simpl=msg-f:1784548149255188051 1/4
Enqiang He <[e-mail]>
NOI Received from Ardent Mills, LLC N109200010
Jason Gauderman <[e-mail]>Wed, Dec 6, 2023 at 8:48 AM
To: "[e-mail]" <[e-mail]>
Cc: Seth Jennings <[e-mail]>, Jack Batho <[e-mail]>, Mike Freese
<[e-mail]>
Hello,

CH-01 would be 1965 as estimated installation date with 13,000 CFM
M-07 would be 1955 estimated installation date with 20,000 CFM

Thanks
Jason

Jason Gauderman
Plant Manager | Operations
2780 G Ave | Ogden, Utah, 84401
Phone: [phone] | Cell: 952-491-3282
ardentmills.com

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1/22/24, 9:54 PM State of Utah Mail - NOI Received from Ardent Mills, LLC N109200010
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From: Enqiang He <[e-mail]>
Sent: Wednesday, November 8, 2023 3:55 PM
To: Mike Freese <[e-mail]>
Cc: Jack Batho <[e-mail]>; Jason Gauderman <[e-mail]>
Subject: Re: [EXTERNAL] NOI Received from Ardent Mills, LLC N109200010

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Mike Freese
Sr. Project Manager
O: 515.981.3216 C: 515.371.1409

From: Enqiang He <[e-mail]>
Sent: Thursday, June 8, 2023 4:57 PM
To: Mike Freese <[e-mail]>
Subject: [EXTERNAL] NOI Received from Ardent Mills, LLC N109200010

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attachments.

Hello Mike,

The Division of Air Quality has received your NOI submitted for
Ardent Mills, LLC. I have been assigned to review this project.
Upon an administrative review, I had the following questions:

1. Baghouses M-07 and CH01.
1/22/24, 9:54 PM State of Utah Mail - NOI Received from Ardent Mills, LLC N109200010
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Were these two baghouses permitted to vent indoors or
outdoors when they were initially permitted? I do not know
since our company did not do the original or any subsequent
applications and I do not have records of those applications. I
made these statements based on information in the current
permit that specifically states; “Exhaust is vented internally and
not discharged to the atmosphere.” Please look at the prior
applications and let us know, but the permit says they vent
indoors. If they were initially permitted to vent indoors, and
now they will vent outdoors, then you need to add emissions
from the two baghouses to the sitewide totals. If these
baghouses were initially permitted outdoors, then their
emissions have been accounted for; therefore, we just need to
change the related conditions in the AO to reflect it. Please
refer to the last page of the application “Potential Emissions”.
You will see that I did an itemization of current outdoor and
indoor point sources potential emissions.

2. Baghouses E-16 and P-07.
Were these two baghouses initially permitted to vent indoors or
outdoors? Same answer as above except no statement in the
permit indicating they vent indoors. If they were initially
permitted to vent indoors, then we just need to change the
related conditions in the AO to reflect it. However, if they were
initially permitted to vent outdoors, and now they will vent
indoors, then you need to remove the emissions from the
baghouses from the sitewide totals. Same comment as above
and note that there is a line item for outdoor fugitive and
outdoor point sources.

Please provide the above requested information within two
weeks from today. I will need information from you to provide
1/22/24, 9:54 PM State of Utah Mail - NOI Received from Ardent Mills, LLC N109200010
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the information you want. Either all prior applications or either
you look at the applications to let us know the answers
whether they were vented indoors or outdoors. Thanks for
your help.

EQ He, CPM
Permitting Engineer, Minor NSR Section, Permitting Branch |
Division of Air Quality
1950 West 195 North, Salt Lake City, UT 84116
Phone: [phone]
[e-mail]

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