DAQ-2025-004842

DAQE-AN109170051-25

{{$d1 }}

Ian Wright
Compass Minerals Ogden Inc.
9900 West 109th Street
Overland Park, KS 66210
[e-mail]

Dear Mr. Wright:

Re: Approval Order: Modification to Approval Order DAQE-AN109170049-24 to Update Equipment
Project Number: N109170051

The attached Approval Order (AO) is issued pursuant to the Notice of Intent (NOI) received on
September 10, 2024. Compass Minerals Ogden Inc. must comply with the requirements of this AO, all
applicable state requirements (R307), and Federal Standards.

The project engineer for this action is Stockton Antczak, 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:SA:jg

cc: Weber-Morgan Health Department
EPA Region 8

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

Tim Davis
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

September 25, 2025

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

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APPROVAL ORDER
DAQE-AN109170051-25
Modification to Approval Order DAQE-AN109170049-24 to
Update Equipment

Prepared By
Stockton Antczak, Engineer
[phone]
[e-mail]

Issued to
Compass Minerals Ogden Inc. - Production Plant

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality

September 25, 2025
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 .................................................................................... 5
SECTION II: PERMITTED EQUIPMENT .............................................................................. 5
SECTION II: SPECIAL PROVISIONS ..................................................................................... 9
PERMIT HISTORY ................................................................................................................... 26
ACRONYMS ............................................................................................................................... 27

DAQE-AN109170051-25
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Compass Minerals Ogden Inc. Compass Minerals Ogden Inc. - Production Plant

Mailing Address Physical Address
9900 West 109th Street 765 North 10500 West
Overland Park, KS 66210 Ogden, UT 84404

Source Contact UTM Coordinates
Name: Ian Wright 396,869 m Easting
Phone: [phone],570,651 m Northing
Email: [e-mail] Datum NAD27
UTM Zone 12
SIC code 2819 (Industrial Inorganic Chemicals, NEC)

SOURCE INFORMATION
General Description
Compass Minerals Ogden Inc. (Compass) harvests and processes salt and minerals from the Great Salt
Lake to produce sulfate of potash (SOP), salt, and magnesium chloride.

NSR Classification
Minor Modification at Major Source

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

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), Db: Standards of Performance for Industrial-Commercial-Institutional Steam
Generating Units
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
MACT (Part 63), DDDDD: National Emission Standards for Hazardous Air Pollutants for
DAQE-AN109170051-25
Page 4

Major Sources: Industrial, Commercial, and Institutional Boilers and Process Heaters
Title V (Part 70) Major Source

Project Description
Compass has requested to replace an emergency generator with an engine from their West Desert facility.
Engine OGN007 will be replaced with OGN003. This will result in a small decrease in NOx and SO2
emissions and a small increase in CO emissions. The removal of crusher OCR503 is also documented in
this project, which resulted in a minor reduction in particulate emissions.

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)
Ammonia 0 6.02
CO2 Equivalent 0 225583.00
Carbon Monoxide 0.02 161.36
Nitrogen Oxides -0.13 38.66
Particulate Matter - PM10 0 285.60
Particulate Matter - PM10 (Fugitives) 0 79.76
Particulate Matter - PM2.5 0 131.75
Particulate Matter - PM2.5 (Fugitives) 0 9.71
Sulfur Dioxide -0.02 2.88
Volatile Organic Compounds 0 51.47
Volatile Organic Compounds - Fugitive 0 10.87

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Benzene (Including Benzene From Gasoline) (CAS #71432) 0 8
Cadmium (CAS #7440439) 0 4
Chlorine (CAS #7782505) 0 6132
Chloroform (CAS #67663) 0 43832
Chromium Compounds (CAS #CMJ500) 0 5
Formaldehyde (CAS #50000) 0 4313
Generic HAPs (CAS #GHAPS) 0 4
Hexane (CAS #110543) 0 6774
Hydrochloric Acid (Hydrogen Chloride) (CAS #7647010) 0 58867
Manganese Compounds (CAS #MAR500) 0 1
Methanol (CAS #67561) 0 6432
Naphthalene (CAS #91203) 0 2
Nickel Compounds (CAS #NDB000) 0 8
Toluene (CAS #108883) 0 13
Change (TPY) Total (TPY)
Total HAPs 0 63.20

DAQE-AN109170051-25
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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 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]
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 Production Plant
Salt, Magnesium Chloride, and SOP
II.A.2 Dryer 501 (D-501) Location: Salt Plant Capacity: 51 MMBtu/hr Fuel Type: Natural Gas Controlled by wet scrubber (AH-513)
DAQE-AN109170051-25
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II.A.3 Dryer 1400 (D-1400) Location: SOP Plant Capacity: 51 MMBtu/hr Fuel Type: Natural Gas Controlled by baghouse (BH-1400) II.A.4 Dryer 1545 (D-1545) Location: SOP Plant - Compaction
Capacity: 30 MMBtu/hr Fuel Type: Natural Gas Controlled by baghouse (BH-008)

II.A.5 Wet Scrubber (AH-500) Location: Salt Plant Controls: Coolers, Bins & Hoppers, Conveyors, Crushers & Grinders, Feeders & Baggers, Mixers, Presses, and Rail Loading Mechanically Aided
II.A.6 Baghouse (BH-501) Location: Salt Plant
Controls: Fluidized bed cooler

II.A.7 Wet Scrubber (AH-502) Location: Salt Plant Controls: Bins & Hoppers, Conveyors, Elevators, and Screens Mechanically Aided
II.A.8 Baghouse (BH-502)
Location: Salt Plant Controls: Bins & Hoppers, Elevators, and truck loading operations

II.A.9 Baghouse (BH-503) Location: Salt Plant Controls: Material handling in the salt special products system
II.A.10 Baghouse (BH-505) Location: Salt Plant
Controls: Material handling in the salt packing area
Equipped with a HEPA Filter and vented indoors.
II.A.11 Wet Scrubber with Cyclone (AH-513) Location: Salt Plant Controls: Salt Dryer (D-501) Mechanically Aided with Variable Frequency Drive (VFD)
II.A.12 Venturi Wet Scrubber (AH-692)
Location: Magnesium Chloride Plant
Controls: Bins & Hoppers, Conveyors, Crushers & Grinders, Elevators, Feeders & Baggers, and
Screens

II.A.13 Baghouse (BH-001) Location: SOP Plant Controls: Bins & Hoppers, Screens, and Truck and Rail loading operations
II.A.14 Baghouse (BH-002)
Location: SOP Plant
Controls: Bins & Hoppers, Conveyors, Elevators, and Screens

DAQE-AN109170051-25
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II.A.15 Baghouse with Cyclone (BH-008) Location: SOP Plant Controls: Conveyor and SOP Compaction Dryer (D-1545) II.A.16 Baghouse with Cyclones (BH-1400)
Location: SOP Plant Controls: Bins & Hoppers, Conveyors, Elevators, Screens, and SOP Dryer (D-1400)
II.A.17 Bin Vent Filter (BH-1505) Location: SOP Plant Controls: Bins & Hoppers
II.A.18 Baghouse (BH-1516) Location: SOP Plant Controls: Bins & Hoppers, Conveyors, Elevators, and Screens

II.A.19 Wet Scrubber (AH-1555) Location: SOP Plant Controls: Bins & Hoppers, Conveyors, and Elevators Mechanically Aided with VFD
II.A.20 Two Boilers
Capacity: 108.11 MMBtu/hr (each) Fuel Type: Natural Gas
Installed Controls: Ultra-Low NOx burner and flue gas recirculation
Monitoring: Continuous Emission Monitoring System (CEMS) NSPS Applicability: Subpart Db

II.A.21 Submerged Combustion Water Heater (SC-450) Location: SOP Plant Capacity: 30 MMBtu/hr Fuel: Natural Gas II.A.22 Submerged Combustion Water Heater (SC-460)
Location: SOP Plant
Capacity: 60 MMBtu/hr Fuel: Natural Gas

II.A.23 Four Magnesium Chloride Evaporators Two operating units with one primary and one secondary evaporator each Location: Magnesium Chloride Plant
II.A.24 Two Cooling Towers (CT-003 & CT-004) Location: SOP Plant
Re-circulation rate: 1500 gpm

II.A.25 Cooling Tower (CT-639) Location: Magnesium Chloride Plant Re-circulation rate: 212 gpm
II.A.26 Abrasive Blasting
Capacity: 50 lb/hr

DAQE-AN109170051-25
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II.A.27 Emergency Generator Engine (GN-100) Rating: 610 hp Fuel: Diesel NSPS Applicability: Subpart IIII MACT Applicability: Subpart ZZZZ II.A.28 Emergency Generator Engines (GN-200 & GN-300) Quantity: Two
Rating: 41 hp Fuel: Propane NSPS Applicability: Subpart JJJJ
MACT Applicability: Subpart ZZZZ
II.A.29 Emergency Generator Engine (GN-1200) Rating: 402 hp Fuel: Diesel NSPS Applicability: Subpart IIII MACT Applicability: Subpart ZZZZ II.A.30 Emergency Generator Engine (GN-1300)
Rating: 161 hp
Fuel: Diesel NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

II.A.31 Emergency Generator Engine (GN-003) Rating: 145 hp Fuel: Diesel MACT Applicability: Subpart ZZZZ
II.A.32 Emergency Generator Engine (GN-500)
Rating: less than 100 hp Fuel: Propane
NSPS Applicability: Subpart JJJJ
MACT Applicability: Subpart ZZZZ
II.A.33 Cooling Belt Fan (AH-696) Location: Magnesium Chloride Plant II.A.34 Fuel Tanks
Fuel: Gasoline
Quantity: One Capacity: 6,000 gallons
Fuel: Diesel
Quantity: Two
Capacity: 10,000 gallons (each)

II.A.35 SOP Silo Building Various Storage Silos Quantity: 11 Location: SOP Plant Controls: Fifteen dust torit cartridge filters; internally vented
II.A.36 Dome Silos (12, 13, and 14)
Location: SOP Plant

DAQE-AN109170051-25
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II.A.37 Fully Enclosed Conveyors Location: SOP Plant IDs: OC014, OC015, OC1404, OC1405, OC1406, OC1501, OC1550A, OC283, OC284, OC294, OC298, OF012, OF013
II.A.38 Partially Enclosed Conveyors Location: SOP Plant ID: OC276, OC277/214, OC279, OC280, OC281
Location: Salt Plant ID: OC503

II.A.39 Various Conveyors and Bucket Elevators Location: Facility Wide
II.A.40 Various Bins and Hoppers Location: Facility Wide

II.A.41 Various Screens, Grinders, and Crushers II.A.42 Fortress Equipment
Two hoppers controlled by baghouse
Two mixing tanks Two holding tanks

SECTION II: SPECIAL PROVISIONS
II.B REQUIREMENTS AND LIMITATIONS
II.B.1 Site-Wide Requirements
II.B.1.a Unless otherwise specified in this AO, visible emissions from any stationary and fugitive
emission source shall not exceed 10 percent opacity. This includes, but is not limited to, all wet scrubbers and all baghouses. [R307-401-8]

DAQE-AN109170051-25
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II.B.1.a.1 Monitoring A. Except as noted in B through D below, a visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. For baghouses subject to 40 CFR Part 64, the owner/operator shall designate one of the weekly opacity surveys to demonstrate compliance with the monthly survey requirement in this condition. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance with 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources B. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9, however, the requirement for observations to be made at 15 second intervals over a six- minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation C. For emission units located within a building, the requirements of paragraph A apply to each affected emission unit located within a building or for the building itself. If visible emissions from a building are monitored, the requirements of paragraph A apply to each side, roof, and vent of the building. The affected emission unit(s) shall be operating when monitoring is performed on the unit located within a building or on the building itself D. The owner/operator is not required to perform monthly surveys on natural gas combustion sources, cooling towers, magnesium chloride evaporators, and petroleum storage tanks. [R307-401-8] II.B.1.a.2 Recordkeeping
The owner/operator shall keep a log of the visual opacity survey(s) containing the following
information: date and time visual emissions observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a
notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix
A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]

II.B.2 Salt Plant Requirements
II.B.2.a The following production limits shall not be exceeded:

A. 700,000 tons of road salt produced per rolling 12-month period

B. 960,000 tons of dried salt produced per rolling 12-month period.

[R307-401-8]

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II.B.2.a.1 The owner/operator shall demonstrate compliance with the rolling 12-month total for each production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production records shall be determined by examination of sales, billing records, or operation logs. The records of production shall be kept on a daily basis. [R307-401-8] II.B.2.b Visible emissions from the following outdoor operations and equipment shall not exceed 10%
opacity: A. All loading operations
B. All conveyors drop points
C. All conveyor transfer points
D. All bin vents
E. All storage piles

F. All partially enclosed conveyance systems
G. All material handling operations, which include the following: bins & hoppers,
screens, crushers, grinders, and presses.
[R307-401-8]

II.B.2.b.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance with 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing methods, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9; however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation. [R307-401-8]
II.B.2.b.2 Recordkeeping
The owner/operator shall keep a log of the visual opacity survey(s) containing the following
information: date and time visual emissions observed, emission point location and description,
time and date of opacity test, and percent opacity. If an opacity determination is performed, a
notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix
A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing
methods, as acceptable to the Director, shall be maintained. [R307-401-8]

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II.B.2.c Emissions to the atmosphere from the baghouses and wet scrubbers located at the Salt Plant for PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the limits shall be based on an average of 3 test runs and shall include both filterable and condensable emissions (standardized at 68 °F, 29.92 in Hg): Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration (lb/hr) (lb/hr) (grains/dscf) AH-500 1.61 1.61 0.01 AH-502 1.12 0.74 0.04 AH-513 1.49 1.49 0.0114 BH-501 1.30 1.15 0.01 BH-502 0.20 0.06 0.0053 BH-503 1.54 0.23 0.01 [R307-401-8]
II.B.2.c.1 Testing Frequency Compliance testing shall be done on each emission source at least once every calendar year and
in the same calendar quarter in which the most recent stack test was performed. The Director
may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-401-8]

II.B.2.c.2 Notification The Director shall be notified at least 30 days prior to conducting any required emission testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, the stack to be tested, and the procedures to be used. A pretest conference shall be held if directed by the Director. [R307-165]
II.B.2.c.3 Sample Location The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A,
Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety
and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access shall be provided to the test location. [R307-165]

II.B.2.c.4 Calculations To determine mass emission rates (lb/hr, etc.), the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director to give the results in the specified units of the emission limitation. [R307-165]
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II.B.2.c.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days) B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
II.B.2.c.6 Volumetric Flow Rate
40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the Director. [R307-165]

II.B.2.c.7 PM10/PM2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR 51, Appendix M, Method 201a, or other EPA-approved testing method, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively, appropriate particle sizing analytical methods, such as x-ray diffraction, scanning electron microscopy, or electron microprobe analysis, may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. [R307-165] II.B.2.c.8 Results
The results of stack testing shall be submitted to the Director within 60 days of completion of the
testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status. [R307-165]

II.B.2.d The owner/operator shall vent Baghouse 505 (BH-505) indoors at all times during operation. [R307-401-8]
II.B.3 Magnesium Chloride Plant Requirements
II.B.3.a The following production limits shall not be exceeded: A. 1,000,000 tons of magnesium chloride liquid produced from ponds per rolling 12-month period B. 70,080 tons of magnesium chloride flake produced per rolling 12-month period. [R307-401-8]
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II.B.3.a.1 The owner/operator shall demonstrate compliance with the rolling 12-month total for each production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production records shall be determined by examination of sales, billing records, or operation logs. The records of production shall be kept on a daily basis. [R307-401-8] II.B.3.b Visible emissions from the following outdoor operations and equipment shall not exceed 10%
opacity: A. All loading operations
B. All conveyors drop points
C. All conveyor transfer points
D. All storage piles
E. All partially enclosed conveyance systems

F. All material handling operations, which include the following: bins & hoppers, screens, crushers, grinders, and presses.

[R307-401-8]
II.B.3.b.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance with 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9; however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation. [R307-401-8]
II.B.3.b.2 Recordkeeping The owner/operator shall keep a log of the visual opacity survey(s) containing the following
information: date and time visual emissions observed, emission point location and description,
time and date of opacity test, and percent opacity. If an opacity determination is performed, a
notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix
A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing
methods, as acceptable to the Director, shall be maintained. [R307-401-8]

II.B.3.c With the exception of periods of startup, shutdown, and maintenance, the owner/operator shall only operate one set of two evaporators at any one time. [R307-401-8]
II.B.3.d The owner/operator shall not exceed 8,760 hours of operation combined from the two sets of
evaporators per rolling 12-month period. Periods of startup, steady-state, and shutdown are to be
included in this limit. Steam cleaning operations, where no chlorine is being added to the
evaporators, are not considered part of this operational limit. [R307-401-8]

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II.B.3.d.1 The owner/operator shall demonstrate compliance with the rolling 12-month total by tracking the hours of operation for each set of evaporators. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of the hours of operation shall be kept for all periods when the plant is in operation. The records of operation shall be kept on a daily basis and include startup, steady-state, and shutdown operational times. [R307-401-8] II.B.3.e Emissions to the atmosphere from the wet scrubber located at the Magnesium Chloride Plant for
PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the limits shall be based on an average of 3 test runs and shall include both filterable and condensable emissions (standardized at 68 °F, 29.92 in Hg):
Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration (lb/hr) (lb/hr) (grains/dscf)
AH-692 0.15 0.12 0.01

Combined emissions to the atmosphere from each set of two Magnesium Chloride Plant Evaporators for VOC and HCl shall not exceed the following rates. Compliance with the limit
shall be based on an average of 3 test runs:
Emission Point VOC Emission Rate HCl Emission Rate
(lb/hr) (lb/hr)
MgCl2 Evaporators 6.18 6.40

[R307-401-8]
II.B.3.e.1 Testing Frequency Compliance testing for AH-692 shall be performed at least once every calendar year and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. Compliance testing for both VOC and HCl shall be performed at least once every three years for each train of the Magnesium Chloride Evaporators. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-165]
II.B.3.e.2 Notification The Director shall be notified at least 30 days prior to conducting any required emission testing.
A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by
the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, the stack to be tested, and the procedures to be used. A pretest conference
shall be held if directed by the Director. [R307-165]

II.B.3.e.3 Sample Location The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An OSHA or MSHA approved access shall be provided to the test location. [R307-165]
II.B.3.e.4 Calculations
To determine mass emission rates (lb/hr, etc.) the pollutant concentration as determined by the
appropriate methods specified herein shall be multiplied by the volumetric flow rate and any
necessary conversion factors determined by the Director, to give the results in the specified units
of the emission limitation. [R307-165]

DAQE-AN109170051-25
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II.B.3.e.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days) for the AH-692 scrubber, or the previous three years for the magnesium chloride evaporators B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
II.B.3.e.6 Volumetric Flow Rate 40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the
Director. [R307-165]

II.B.3.e.7 PM10/PM2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR 51, Appendix M, Method 201a, or other EPA-approved testing method, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively, appropriate particle sizing analytical methods, such as x-ray diffraction, scanning electron microscopy, or electron microprobe analysis may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M, Method 202, or other EPA-approved testing method as acceptable to the Director. [R307-165]
II.B.3.e.8 Volatile Organic Compounds
VOC emissions shall be determined using 40 CFR 60, App. A, Method 25A using a flame ionization analyzer equipped with a methane separator. If such an analyzer is unavailable, VOC
emissions shall be determined simultaneously using two analyzers, with one configured to read
only methane. The difference between the total organic detector and the methane detector shall
constitute the VOC measurement. [R307-165]

II.B.3.e.9 HCl HCl emissions shall be determined using 40 CFR 60, Appendix A, Method 26, or 26A or other EPA-approved testing method acceptable to the Director. [R307-401-8]
II.B.3.e.10 Results
The results of stack testing shall be submitted to the Director within 60 days of completion of the
testing. Reports shall clearly identify results as compared to permit limits and indicate
compliance status. [R307-165]

DAQE-AN109170051-25
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II.B.4 SOP Plant Requirements II.B.4.a The following production and operation limits shall not be exceeded:
A. 5,300,000 tons of potash harvested from ponds per rolling 12-month period
B. 1,680,000 tons of SOP produced per rolling 12-month period C. 432,000 tons of KCl used per rolling 12-month period.
[R307-401-8]
II.B.4.a.1 The owner/operator shall demonstrate compliance with the rolling 12-month total for each production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production records shall be determined by operation logs. The records of production shall be kept on a daily basis. [R307-401-8]
II.B.4.b Visible emissions from all outdoor storage silos shall not exceed 10% opacity.
Egress points to the dome silos shall remain closed at all times, except when mobile equipment is
actively entering or exiting the silo during loading or unloading operations. [R307-401-8]

II.B.4.b.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a monthly basis while loading or unloading operations are occurring at the silo. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing methods, as acceptable to the Director. The opacity determination shall be performed while loading or unloading operations are occurring at the silo. [R307-401-8]
II.B.4.b.2 Recordkeeping
The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions observed, emission point location and description,
time and date of opacity test, and percent opacity. If an opacity determination is performed, a
notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, shall be
maintained. Documentation of maintenance performed on the silos to ensure they operate as fully
enclosed structures when egress points are closed shall also be kept in the log. [R307-401-8]

II.B.4.c Visible emissions from all outdoor fully enclosed conveyance systems shall not exceed 5% opacity. At all times, the owner/operator shall operate and maintain each affected emission unit as a fully enclosed conveyance system. Each fully enclosed conveyance system shall be fully enclosed on all sides, top, and bottom. All fully enclosed conveyance systems shall be clearly labeled on each conveyor such that an inspector/operator can safely identify equipment at any time. [R307-401-8]
DAQE-AN109170051-25
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II.B.4.c.1 Monitoring The owner/operator shall conduct a Method 22 performance test, or other EPA-approved testing method, as acceptable to the Director, according to the following requirements for each affected emission unit. A. Conduct a weekly 10-minute visible emissions test of each affected emission unit in accordance with Method 22 of 40 CFR 60 Appendix A, or other EPA-approved testing method, as acceptable to the Director. The performance test shall be conducted while the unit is in operation B. If any visible emissions are observed from an emission unit, the owner/operator shall inspect the affected emission unit to determine the cause of visible emissions and initiate corrective action within 1 hour of the initial survey C. If no visible emissions are observed during four consecutive weekly tests, the owner/operator may decrease the frequency of the visible emissions test required in paragraph (A) from weekly to monthly. If visible emissions are observed during any monthly test, the owner/operator shall resume the weekly visible emissions test required in paragraph (A) and maintain that schedule until no visible emissions are observed in four consecutive weekly tests. [R307-401-8]
II.B.4.c.2 Recordkeeping The owner/operator shall keep a log of the visible emissions tests that contains the following
information: time and date of test, emission point location and description, time of visible
emissions (if observed), results of inspections, time and date corrective actions initiated, and corrective actions taken. All data required by 40 CFR 60, Appendix A, Method 22, or other
EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]

II.B.4.d Visible emissions from the following outdoor operations and equipment shall not exceed 10% opacity: A. All loadout operations B. All storage piles C. All material handling operations, which include the following: bins & hoppers, screens, crushers, grinders, and presses D. All partially enclosed conveyance systems E. All conveyors drop points F. All conveyor transfer points G. All bin vents. [R307-401-8]
DAQE-AN109170051-25
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II.B.4.d.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance with 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing methods, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9; however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation. [R307-401-8]
II.B.4.d.2 Recordkeeping The owner/operator shall keep a log of the visual opacity survey(s) containing the following
information: date and time visual emissions observed, emission point location and description,
time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix
A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing
method, as acceptable to the Director, shall be maintained. [R307-401-8]
II.B.4.e All partially enclosed conveyance systems shall be clearly labeled on each conveyor such that an inspector/operator can safely identify equipment at any time. [R307-401-8] II.B.4.f Emissions to the atmosphere from the baghouses and wet scrubbers located at the SOP Plant for
PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the
limits shall be based on an average of 3 test runs and shall include both filterable and condensable emissions (standardized at 68 °F, 29.92 in Hg):

Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration (lb/hr) (lb/hr) (grains/dscf)

AH-1555 2.61 0.39 0.01 BH-001 0.37 0.37 0.01
BH-002 0.65 0.47 0.01
BH-008 4.25 4.25 0.01 BH-1400 2.78 2.78 0.02
BH-1516 1.46 0.22 0.01
[R307-401-8]

II.B.4.f.1 Testing Frequency Compliance testing shall be done on each emission source at least once every calendar year and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-401-8]
II.B.4.f.2 Notification
The Director shall be notified at least 30 days prior to conducting any required emission testing.
A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by
the Director prior to performing the test(s). The source test protocol shall outline the proposed
test methodologies, the stack to be tested, and the procedures to be used. A pretest conference
shall be held if directed by the Director. [R307-165]

DAQE-AN109170051-25
Page 20

II.B.4.f.3 Sample Location The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An OSHA or MSHA approved access shall be provided to the test location. [R307-165]
II.B.4.f.4 Calculations To determine mass emission rates (lb/hr, etc.), the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any
necessary conversion factors determined by the Director to give the results in the specified units of the emission limitation. [R307-165]
II.B.4.f.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days) B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
II.B.4.f.6 Volumetric Flow Rate 40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the
Director. [R307-165]

II.B.4.f.7 PM10/PM2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR 51, Appendix M, Method 201a, or other EPA-approved testing method, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively, appropriate particle sizing analytical methods, such as x-ray diffraction, scanning electron microscopy, or electron microprobe analysis may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. [R307-165]
II.B.4.f.8 Results
The results of stack testing shall be submitted to the Director within 60 days of completion of the
testing. Reports shall clearly identify results as compared to permit limits and indicate
compliance status. [R307-165]

DAQE-AN109170051-25
Page 21

II.B.5 Boiler Requirements II.B.5.a NOx emissions to the atmosphere from each of the two boilers on site shall not exceed the
following rates and concentrations: Rate (lbs/hr) Concentration (ppm)
1.30 9.0
Compliance with the limit shall be based on an average of three test runs. [R307-401-8]

II.B.5.a.1 Testing Frequency Compliance testing shall be done on each emission source at least once every calendar year and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-401-8]
II.B.5.a.2 Notification The Director shall be notified at least 30 days prior to conducting any required emission testing.
A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by
the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, the stack to be tested, and the procedures to be used. A pretest conference
shall be held if directed by the Director. [R307-165]

II.B.5.a.3 Sample Location The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An OSHA or MSHA approved access shall be provided to the test location. [R307-165]
II.B.5.a.4 Calculations
To determine mass emission rates (lb/hr, etc.), the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any
necessary conversion factors determined by the Director, to give the results in the specified units
of the emission limitation. [R307-165]
II.B.5.a.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days) B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
DAQE-AN109170051-25
Page 22

II.B.5.a.6 Volumetric Flow Rate 40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the Director. [R307-165] II.B.5.a.7 Nitrogen Oxides
NOx emissions shall be determined using 40 CFR 60 Appendix A, Method 7E, or other EPA-approved testing method acceptable to the Director. [R307-165]
II.B.5.a.8 Results The results of stack testing shall be submitted to the Director within 60 days of completion of the testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status. [R307-165] II.B.6 Dryer Requirements
II.B.6.a Emissions to the atmosphere from each of the three dryers on site (D-501, D-1400, and D-1545) for NOx shall not exceed 20 ppm at 3% O2. Compliance with the limits shall be based on an average of 3 test runs. [R307-401-8]
II.B.6.a.1 Testing Frequency
Compliance testing shall be done on each emission source at least once every three years. The Director may require testing at any time. If an existing source is modified, a compliance test is
required on the modified emission point that has an emission rate limit. [R307-165]

II.B.6.a.2 Notification The Director shall be notified at least 30 days prior to conducting any required emission testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, the stack to be tested, and the procedures to be used. A pretest conference shall be held if directed by the Director. [R307-165] II.B.6.a.3 Sample Location
The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A,
Method 1, or other EPA approved methods acceptable to the Director. An OSHA or MSHA approved access shall be provided to the test location. [R307-165]

II.B.6.a.4 Calculations To determine mass emission rates (lb/hr, etc.), the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director, to give the results in the specified units of the emission limitation. [R307-165]
DAQE-AN109170051-25
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II.B.6.a.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous three years B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
II.B.6.a.6 Volumetric Flow Rate
40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the Director. [R307-165]

II.B.6.a.7 Nitrogen Oxides NOx emissions shall be determined using 40 CFR 60 Appendix A, Method 7E, or other EPA-approved testing method acceptable to the Director. [R307-165]
II.B.6.a.8 Results The results of stack testing shall be submitted to the Director within 60 days of completion of the
testing. Reports shall clearly identify results as compared to permit limits and indicate
compliance status. [R307-165]
II.B.7 Baghouse and Wet Scrubber Requirements
II.B.7.a Each baghouse shall operate within the static pressure range recommended by the manufacturer
for normal operations. The static pressure range shall be clearly labeled on each baghouse such that an inspector/operator can safely read the range at any time. Manometer or magnehelic
pressure gauges shall be installed to measure the differential pressure across each of the
baghouses. The pressure gauges shall be located such that an inspector/operator can safely read the indicator at any time. For baghouses that monitor pressure drop to demonstrate compliance
with 40 CFR Part 64, the requirements in this condition shall not apply. [R307-401-8]

II.B.7.a.1 Pressure drop readings from each baghouse shall be recorded at least once during each day of operation. Records documenting these inspections shall be kept in a log and shall include the following: A. Unit identification; B. Manufacturers recommended pressure drop for the unit; C. Daily pressure drop readings; and D. Date of bag replacements. [R307-401-8]
DAQE-AN109170051-25
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II.B.7.a.2 The pressure gauges of each baghouse shall be calibrated in accordance with the manufacturer's instructions or recommendations at least once every 12 months. Documentation of calibrations shall be maintained for all periods when the plant is in operation. [R307-401-8] II.B.7.b Each wet scrubber shall operate within the static pressure range and liquid flow rate
recommended by the manufacturer for normal operations. These parameters shall be clearly labeled on each scrubber such that an inspector/operator can safely read the parameters at any time. Manometer or magnehelic pressure gauges shall be installed to measure the differential
pressure across the wet scrubber. Flow rate meters shall be installed to measure the liquid flow rate in the scrubber. The pressure gauges and flow rate meters shall be located such that an inspector/operator can safely read the indicators at any time.
For scrubbers that are subject to 40 CFR Part 64, the requirements in this condition shall not apply. [R307-401-8]

II.B.7.b.1 Pressure drop and liquid flow rate readings from each wet scrubber shall be recorded at least once during each day of operation. Records documenting these inspections shall be kept in a log and shall include the following: A. Unit identification; B. Manufacturers recommended pressure drop and liquid flow rate for the unit; C. Daily pressure drop readings; and D. Daily liquid flow rate readings. [R307-401-8]
II.B.7.b.2 The gauges and meters on each wet scrubber shall be calibrated in accordance with the
manufacturer's instructions or recommendations at least once every 12 months. Documentation of calibrations shall be maintained for all periods when the plant is in operation.

For scrubbers that monitor liquid flow rate to demonstrate compliance with 40 CFR Part 64, the liquid flow rate requirements in this condition shall not apply. All other requirements in this
condition remain applicable. [R307-401-8]

II.B.8 Engine Requirements II.B.8.a Visible emissions from diesel-fired emergency generator engines shall not exceed 20% opacity.
[R307-401-8]

II.B.8.a.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a quarterly basis while the unit is operating by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than steam are observed from an emission unit, a 6-minute opacity determination of that emission unit shall be performed by a certified observer within one hour of the initial survey. The opacity determination shall be performed while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director. If the generator(s) continue to operate on consecutive days following the initial observation, a 6-minute opacity determination shall be performed by a certified observer on a daily basis, while the unit is operating, in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director. [R307-401-8]
DAQE-AN109170051-25
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II.B.8.a.2 Recordkeeping The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]
II.B.8.b Visible emissions from propane-fired emergency generator engines shall not exceed 10% opacity. [R307-401-8]
II.B.8.b.1 Monitoring In lieu of monitoring via visible emission observations, records shall be kept for any period that a fuel other than propane is used in the affected emission unit. [R307-401-8]
II.B.8.b.2 Recordkeeping Records shall be kept in a log that is kept in a readily accessible location onsite. [R307-401-8]

II.B.8.c The owner/operator shall use the emergency generator engines for electricity-producing operations only during the periods when electric power from the public utilities is interrupted. [R307-401-8]
II.B.8.d The owner/operator shall track hours of operation for each emergency generator engine as required to comply with all applicable federal subparts.
[40 CFR 60 Subpart IIII, 40 CFR 60 Subpart JJJJ, 40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.9 Fuel Requirements II.B.9.a The owner/operator shall only use diesel fuel (fuel oil #1, #2, or diesel fuel oil additives) in the
diesel-fired engines on site. All diesel burned shall contain no more than 15 ppm sulfur.
[R307-401-8]
II.B.9.a.1 To demonstrate compliance with the diesel fuel requirements for any diesel fuel purchased, the owner/operator shall keep and maintain fuel purchase invoices. The fuel purchase invoices shall indicate that the diesel fuel meets the sulfur requirements, or the owner/operator shall obtain certification of sulfur content from the fuel supplier. [R307-401-8]
II.B.9.b The owner/operator shall only use propane as fuel in the propane-fired engines on site. [R307-401-8]

II.B.9.c The owner/operator shall use only pipeline-quality natural gas as a fuel source for all boilers and burners. [R307-401-8]
II.B.10 Haul Roads and Fugitive Dust Requirements
II.B.10.a The owner/operator shall comply with all applicable requirements of R307-309 for PM10 and PM2.5 non-attainment areas for fugitive emissions and fugitive dust source. At least once every three years, the fugitive dust control plan shall be reviewed and evaluated. If site modifications that result in emission changes have been made, an updated fugitive dust control plan shall be submitted as required by R307-309-6(3). [R307-309, R307-401-8]
II.B.10.b Visible emissions in disturbed, operational areas and unpaved haul roads from haul trucks and
other mobile equipment shall not exceed 20% opacity at any point. [R307-401-8]

II.B.10.b.1 In lieu of monitoring via visible emissions observations, adherence to the most recently approved fugitive dust control plan shall be monitored to demonstrate that the opacity limit is not exceeded and that appropriate measures are being implemented to control fugitive dust. [R307-309, R307-401-8]
DAQE-AN109170051-25
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II.B.10.c Vehicle speeds shall be limited to 30 miles per hour on haul roads and 15 miles per hour in off-road areas. The vehicle speed limits shall be clearly visible and posted, at a minimum, on site at the entrance to off-road areas and at the beginning of the haul road. [R307-401-8] II.B.10.d The owner/operator shall spray all unpaved haul roads with water, brine, or a chemical
suppressant to control fugitive dust and maintain the opacity limit listed in this AO. [R307-401-8]
II.B.10.d.1 Records of water or chemical treatment shall be kept for all periods when the plant is in operation. The owner/operator may stop applying suppressants when the temperature is below freezing. The records shall include the following: A. Date B. Location of treatment C. Rainfall received, if any, and approximate amount D. Records of temperature if the temperature is below freezing. [R307-401-8]
PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents: Supersedes AO DAQE-AN109170049-24 dated May 8, 2024 Is Derived From NOI dated September 10, 2024 Incorporates Additional Information dated May 2, 2025

DAQE-AN109170051-25
Page 27

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-IN109170051-25

August 4, 2025

Ian Wright
Compass Minerals Ogden Inc.
9900 West 109th Street
Overland Park, KS 66210
[e-mail]

Dear Wright:

Re: Intent to Approve: Modification to Approval Order DAQE-AN109170049-24 to Update
Equipment
Project Number: N109170051

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, Stockton Antczak, as well as the
DAQE number as shown on the upper right-hand corner of this letter. Stockton Antczak, can be reached
at [phone] or [e-mail], if you have any questions.

Sincerely,

{{$s }}

Jon L. Black, Manager
New Source Review Section

JLB:SA:jg

cc: Weber-Morgan Health Department
EPA Region 8

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

Tim Davis
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

Jon Black (Jul 30, 2025 13:12:10 MDT)
STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

INTENT TO APPROVE
DAQE-IN109170051-25
Modification to Approval Order DAQE-AN109170049-24
to Update Equipment

Prepared By
Stockton Antczak, Engineer
[phone]
[e-mail]

Issued to
Compass Minerals Ogden Inc. - Production Plant

Issued On
August 4, 2025

{{$s }}

New Source Review Section Manager
Jon L. Black
{{#s=Sig_es_:signer1:signature}}
Jon Black (Jul 30, 2025 13:12:10 MDT)

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
PUBLIC NOTICE STATEMENT............................................................................................... 5
SECTION I: GENERAL PROVISIONS .................................................................................... 5
SECTION II: PERMITTED EQUIPMENT .............................................................................. 6
SECTION II: SPECIAL PROVISIONS ................................................................................... 10
PERMIT HISTORY ................................................................................................................... 27
ACRONYMS ............................................................................................................................... 28

DAQE-IN109170051-25
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Compass Minerals Ogden Inc. Compass Minerals Ogden Inc. - Production Plant

Mailing Address Physical Address
9900 West 109th Street 765 North 10500 West
Overland Park, KS 66210 Ogden, UT 84404

Source Contact UTM Coordinates
Name: Ian Wright 396,869 m Easting
Phone: [phone],570,651 m Northing
Email: [e-mail] Datum NAD27
UTM Zone 12
SIC code 2819 (Industrial Inorganic Chemicals, NEC)

SOURCE INFORMATION
General Description
Compass Minerals Ogden Inc. (Compass) harvests and processes salt and minerals from the Great Salt
Lake to produce sulfate of potash (SOP), salt, and magnesium chloride.

NSR Classification
Minor Modification at Major Source

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

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), Db: Standards of Performance for Industrial-Commercial-Institutional Steam
Generating Units
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
DAQE-IN109170051-25
Page 4

MACT (Part 63), DDDDD: National Emission Standards for Hazardous Air Pollutants for
Major Sources: Industrial, Commercial, and Institutional Boilers and Process Heaters
Title V (Part 70) Major Source

Project Description
Compass has requested to replace an emergency generator with an engine from their West Desert facility.
Engine OGN007 will be replaced with OGN003. This will result in a small decrease in NOx and SO2
emissions and a small increase in CO emissions. The removal of crusher OCR503 is also documented in
this project, which resulted in a minor reduction in particulate emissions.

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)
Ammonia 0 6.02
CO2 Equivalent 0 225583.00
Carbon Monoxide 0.02 161.36
Nitrogen Oxides -0.13 38.66
Particulate Matter - PM10 0 285.60
Particulate Matter - PM10 (Fugitives) 0 79.76
Particulate Matter - PM2.5 0 131.75
Particulate Matter - PM2.5 (Fugitives) 0 9.71
Sulfur Dioxide -0.02 2.88
Volatile Organic Compounds 0 51.47
Volatile Organic Compounds - Fugitive 0 10.87

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Benzene (Including Benzene From Gasoline) (CAS #71432) 0 8
Cadmium (CAS #7440439) 0 4
Chlorine (CAS #7782505) 0 6132
Chloroform (CAS #67663) 0 43832
Chromium Compounds (CAS #CMJ500) 0 5
Formaldehyde (CAS #50000) 0 4313
Generic HAPs (CAS #GHAPS) 0 4
Hexane (CAS #110543) 0 6774
Hydrochloric Acid (Hydrogen Chloride) (CAS #7647010) 0 58867
Manganese Compounds (CAS #MAR500) 0 1
Methanol (CAS #67561) 0 6432
Naphthalene (CAS #91203) 0 2
Nickel Compounds (CAS #NDB000) 0 8
Toluene (CAS #108883) 0 13
Change (TPY) Total (TPY)
Total HAPs 0 63.20

DAQE-IN109170051-25
Page 5

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 August 6, 2025. 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 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]
I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-150]
DAQE-IN109170051-25
Page 6

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 Production Plant Salt, Magnesium Chloride, and SOP
II.A.2 Dryer 501 (D-501) Location: Salt Plant Capacity: 51 MMBtu/hr Fuel Type: Natural Gas Controlled by wet scrubber (AH-513) II.A.3 Dryer 1400 (D-1400) Location: SOP Plant Capacity: 51 MMBtu/hr Fuel Type: Natural Gas Controlled by baghouse (BH-1400)
II.A.4 Dryer 1545 (D-1545) Location: SOP Plant - Compaction Capacity: 30 MMBtu/hr Fuel Type: Natural Gas Controlled by baghouse (BH-008) II.A.5 Wet Scrubber (AH-500) Location: Salt Plant Controls: Coolers, Bins & Hoppers, Conveyors, Crushers & Grinders, Feeders & Baggers, Mixers, Presses, and Rail Loading Mechanically Aided
II.A.6 Baghouse (BH-501) Location: Salt Plant Controls: Fluidized bed cooler
II.A.7 Wet Scrubber (AH-502) Location: Salt Plant Controls: Bins & Hoppers, Conveyors, Elevators, and Screens
Mechanically Aided
II.A.8 Baghouse (BH-502) Location: Salt Plant Controls: Bins & Hoppers, Elevators, and truck loading operations
DAQE-IN109170051-25
Page 7

II.A.9 Baghouse (BH-503) Location: Salt Plant Controls: Material handling in the salt special products system II.A.10 Baghouse (BH-505)
Location: Salt Plant Controls: Material handling in the salt packing area Equipped with a HEPA Filter and vented indoors.

II.A.11 Wet Scrubber with Cyclone (AH-513) Location: Salt Plant Controls: Salt Dryer (D-501) Mechanically Aided with Variable Frequency Drive (VFD) II.A.12 Venturi Wet Scrubber (AH-692)
Location: Magnesium Chloride Plant Controls: Bins & Hoppers, Conveyors, Crushers & Grinders, Elevators, Feeders & Baggers, and
Screens

II.A.13 Baghouse (BH-001) Location: SOP Plant Controls: Bins & Hoppers, Screens, and Truck and Rail loading operations II.A.14 Baghouse (BH-002)
Location: SOP Plant
Controls: Bins & Hoppers, Conveyors, Elevators, and Screens
II.A.15 Baghouse with Cyclone (BH-008) Location: SOP Plant Controls: Conveyor and SOP Compaction Dryer (D-1545)
II.A.16 Baghouse with Cyclones (BH-1400)
Location: SOP Plant Controls: Bins & Hoppers, Conveyors, Elevators, Screens, and SOP Dryer (D-1400)

II.A.17 Bin Vent Filter (BH-1505) Location: SOP Plant Controls: Bins & Hoppers
II.A.18 Baghouse (BH-1516) Location: SOP Plant
Controls: Bins & Hoppers, Conveyors, Elevators, and Screens

II.A.19 Wet Scrubber (AH-1555) Location: SOP Plant Controls: Bins & Hoppers, Conveyors, and Elevators Mechanically Aided with VFD
II.A.20 Two Boilers
Capacity: 108.11 MMBtu/hr (each)
Fuel Type: Natural Gas
Installed Controls: Ultra-Low NOx burner and flue gas recirculation
Monitoring: Continuous Emission Monitoring System (CEMS)
NSPS Applicability: Subpart Db

DAQE-IN109170051-25
Page 8

II.A.21 Submerged Combustion Water Heater (SC-450) Location: SOP Plant Capacity: 30 MMBtu/hr Fuel: Natural Gas
II.A.22 Submerged Combustion Water Heater (SC-460) Location: SOP Plant Capacity: 60 MMBtu/hr
Fuel: Natural Gas
II.A.23 Four Magnesium Chloride Evaporators Two operating units with one primary and one secondary evaporator each Location: Magnesium Chloride Plant II.A.24 Two Cooling Towers (CT-003 & CT-004)
Location: SOP Plant Re-circulation rate: 1500 gpm

II.A.25 Cooling Tower (CT-639) Location: Magnesium Chloride Plant Re-circulation rate: 212 gpm
II.A.26 Abrasive Blasting Capacity: 50 lb/hr

II.A.27 Emergency Generator Engine (GN-100) Rating: 610 hp Fuel: Diesel NSPS Applicability: Subpart IIII MACT Applicability: Subpart ZZZZ
II.A.28 Emergency Generator Engines (GN-200 & GN-300)
Quantity: Two Rating: 41 hp
Fuel: Propane
NSPS Applicability: Subpart JJJJ MACT Applicability: Subpart ZZZZ

II.A.29 Emergency Generator Engine (GN-1200) Rating: 402 hp Fuel: Diesel NSPS Applicability: Subpart IIII MACT Applicability: Subpart ZZZZ
II.A.30 Emergency Generator Engine (GN-1300)
Rating: 161 hp
Fuel: Diesel
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

II.A.31 Emergency Generator Engine (GN-003) Rating: 145 hp Fuel: Diesel MACT Applicability: Subpart ZZZZ
DAQE-IN109170051-25
Page 9

II.A.32 Emergency Generator Engine (GN-500) Rating: less than 100 hp Fuel: Propane NSPS Applicability: Subpart JJJJ MACT Applicability: Subpart ZZZZ II.A.33 Cooling Belt Fan (AH-696) Location: Magnesium Chloride Plant

II.A.34 Fuel Tanks Fuel: Gasoline Quantity: One Capacity: 6,000 gallons Fuel: Diesel Quantity: Two Capacity: 10,000 gallons (each)
II.A.35 SOP Silo Building
Various Storage Silos Quantity: 11
Location: SOP Plant
Controls: Fifteen dust torit cartridge filters; internally vented
II.A.36 Dome Silos (12, 13, and 14) Location: SOP Plant II.A.37 Fully Enclosed Conveyors
Location: SOP Plant
IDs: OC014, OC015, OC1404, OC1405, OC1406, OC1501, OC1550A, OC283, OC284, OC294, OC298, OF012, and OF013

II.A.38 Partially Enclosed Conveyors Location: SOP Plant ID: OC276, OC277/214, OC279, OC280, and OC281 Location: Salt Plant ID: OC503
II.A.39 Various Conveyors and Bucket Elevators Location: Facility Wide

II.A.40 Various Bins and Hoppers Location: Facility Wide
II.A.41 Various Screens, Grinders, and Crushers

II.A.42 Fortress Equipment Two hoppers controlled by baghouse Two mixing tanks Two holding tanks

DAQE-IN109170051-25
Page 10

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 Site-Wide Requirements
II.B.1.a Unless otherwise specified in this AO, visible emissions from any stationary and fugitive emission source shall not exceed 10 percent opacity. This includes, but is not limited to, all wet scrubbers and all baghouses. [R307-401-8] II.B.1.a.1 Monitoring A. Except as noted in B through D below, a visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. For baghouses subject to 40 CFR Part 64, the owner/operator shall designate one of the weekly opacity surveys to demonstrate compliance with the monthly survey requirement in this condition. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance with 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources. B. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9, however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation. C. For emission units located within a building, the requirements of paragraph A apply to each affected emission unit located within a building or for the building itself. If visible emissions from a building are monitored, the requirements of paragraph A apply to each side, roof, and vent of the building. The affected emission unit(s) shall be operating when monitoring is performed on the unit located within a building or on the building itself. D. The owner/operator is not required to perform monthly surveys on natural gas combustion sources, cooling towers, magnesium chloride evaporators, and petroleum storage tanks. [R307-401-8]
II.B.1.a.2 Recordkeeping The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions were observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]

DAQE-IN109170051-25
Page 11

II.B.2 Salt Plant Requirements II.B.2.a The following production limits shall not be exceeded:
A. 700,000 tons of road salt produced per rolling 12-month period.
B. 960,000 tons of dried salt produced per rolling 12-month period. [R307-401-8]

II.B.2.a.1 The owner/operator shall demonstrate compliance with the rolling 12-month total for each production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production records shall be determined by examination of sales, billing records, or operation logs. The records of production shall be kept on a daily basis. [R307-401-8] II.B.2.b Visible emissions from the following outdoor operations and equipment shall not exceed 10%
opacity:
A. All loading operations.

B. All conveyor drop points.
C. All conveyor transfer points.
D. All bin vents.

E. All storage piles.
F. All partially enclosed conveyance systems.
G. All material handling operations, which include the following: bins & hoppers,
screens, crushers, grinders, and presses.
[R307-401-8]

II.B.2.b.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance with 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9; however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation. [R307-401-8]
DAQE-IN109170051-25
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II.B.2.b.2 Recordkeeping The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions were observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]
II.B.2.c Emissions to the atmosphere from the baghouses and wet scrubbers located at the Salt Plant for PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the limits shall be based on an average of 3 test runs and shall include both filterable and
condensable emissions (standardized at 68 °F, 29.92 in Hg): Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration
(lb/hr) (lb/hr) (grains/dscf)
AH-500 1.61 1.61 0.01
AH-502 1.12 0.74 0.04 AH-513 1.49 1.49 0.0114
BH-501 1.30 1.15 0.01
BH-502 0.20 0.06 0.0053 BH-503 1.54 0.23 0.01

[R307-401-8]
II.B.2.c.1 Testing Frequency Compliance testing shall be done on each emission source at least once every calendar year and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-401-8] II.B.2.c.2 Notification
The Director shall be notified at least 30 days prior to conducting any required emission testing.
A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed
test methodologies, the stack to be tested, and the procedures to be used. A pretest conference
shall be held if directed by the Director. [R307-165]
II.B.2.c.3 Sample Location The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access shall be provided to the test location. [R307-165] II.B.2.c.4 Calculations
To determine mass emission rates (lb/hr, etc.), the pollutant concentration as determined by the
appropriate methods specified herein shall be multiplied by the volumetric flow rate and any
necessary conversion factors determined by the Director to give the results in the specified units
of the emission limitation. [R307-165]

DAQE-IN109170051-25
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II.B.2.c.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days). B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate. C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
II.B.2.c.6 Volumetric Flow Rate
40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the Director. [R307-165]

II.B.2.c.7 PM10/PM2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR 51, Appendix M, Method 201a, or other EPA-approved testing method, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M, Method 202, or other EPA-approved testing method as acceptable to the Director. For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively, appropriate particle sizing analytical methods, such as x-ray diffraction, scanning electron microscopy, or electron microprobe analysis, may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M, Method 202, or other EPA-approved testing method as acceptable to the Director. [R307-165] II.B.2.c.8 Results
The results of stack testing shall be submitted to the Director within 60 days of completion of the
testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status. [R307-165]

II.B.2.d The owner/operator shall vent Baghouse 505 (BH-505) indoors at all times during operation. [R307-401-8]

DAQE-IN109170051-25
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II.B.3 Magnesium Chloride Plant Requirements II.B.3.a The following production limits shall not be exceeded:
A. 1,000,000 tons of magnesium chloride liquid produced from ponds per rolling 12-month period.
B. 70,080 tons of magnesium chloride flake produced per rolling 12-month period.
[R307-401-8]
II.B.3.a.1 The owner/operator shall demonstrate compliance with the rolling 12-month total for each production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production records shall be determined by examination of sales, billing records, or operation logs. The records of production shall be kept on a daily basis. [R307-401-8]
II.B.3.b Visible emissions from the following outdoor operations and equipment shall not exceed 10%
opacity:
A. All loading operations.
B. All conveyor drop points.

C. All conveyor transfer points.
D. All storage piles.
E. All partially enclosed conveyance systems.

F. All material handling operations, which include the following: bins & hoppers, screens, crushers, grinders, and presses.

[R307-401-8]
II.B.3.b.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance with 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9; however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation. [R307-401-8]
DAQE-IN109170051-25
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II.B.3.b.2 Recordkeeping The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions were observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]
II.B.3.c With the exception of periods of startup, shutdown, and maintenance, the owner/operator shall only operate one set of two evaporators at any one time. [R307-401-8]
II.B.3.d The owner/operator shall not exceed 8,760 hours of operation combined from the two sets of evaporators per rolling 12-month period. Periods of startup, steady-state, and shutdown are to be included in this limit. Steam cleaning operations, where no chlorine is being added to the evaporators, are not considered part of this operational limit. [R307-401-8] II.B.3.d.1 The owner/operator shall demonstrate compliance with the rolling 12-month total by tracking the
hours of operation for each set of evaporators. The owner/operator shall calculate a new
12-month total by the 20th day of each month using data from the previous 12 months. Records of the hours of operation shall be kept for all periods when the plant is in operation. The records
of operation shall be kept on a daily basis and include startup, steady-state, and shutdown
operational times. [R307-401-8]
II.B.3.e Emissions to the atmosphere from the wet scrubber located at the Magnesium Chloride Plant for PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the limits shall be based on an average of 3 test runs and shall include both filterable and condensable emissions (standardized at 68 °F, 29.92 in Hg): Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration (lb/hr) (lb/hr) (grains/dscf) AH-692 0.15 0.12 0.01 Combined emissions to the atmosphere from each set of two Magnesium Chloride Plant Evaporators for VOC and HCl shall not exceed the following rates. Compliance with the limit shall be based on an average of 3 test runs: Emission Point VOC Emission Rate HCl Emission Rate (lb/hr) (lb/hr) MgCl2 Evaporators 6.18 6.40 [R307-401-8] II.B.3.e.1 Testing Frequency
Compliance testing for AH-692 shall be performed at least once every calendar year and in the
same calendar quarter in which the most recent stack test was performed. The Director may
require testing at any time. If an existing source is modified, a compliance test is required on the
modified emission point that has an emission rate limit.

Compliance testing for both VOC and HCl shall be performed at least once every three years for
each train of the Magnesium Chloride Evaporators. The Director may require testing at any time.
If an existing source is modified, a compliance test is required on the modified emission point
that has an emission rate limit. [R307-165]

DAQE-IN109170051-25
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II.B.3.e.2 Notification The Director shall be notified at least 30 days prior to conducting any required emission testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, the stack to be tested, and the procedures to be used. A pretest conference shall be held if directed by the Director. [R307-165] II.B.3.e.3 Sample Location
The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA)
approved access shall be provided to the test location. [R307-165]
II.B.3.e.4 Calculations To determine mass emission rates (lb/hr, etc.), the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director to give the results in the specified units of the emission limitation. [R307-165] II.B.3.e.5 Source Operation
The production rate during all compliance testing shall be no less than 90% of the permitted
production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed:

A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days) for the AH-692 scrubber or the previous three years for the
magnesium chloride evaporators.
B. If the test is passed, the new maximum allowable production rate shall be 110% of the
tested achieved rate, but not more than the maximum allowable production rate. This
new allowable maximum production rate shall remain in effect until successfully tested at a higher rate.

C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This
process may be repeated until the maximum permitted production rate is achieved.
[R307-165]

II.B.3.e.6 Volumetric Flow Rate 40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the Director. [R307-165]
DAQE-IN109170051-25
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II.B.3.e.7 PM10/PM2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR 51, Appendix M, Method 201a, or other EPA-approved testing method, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M, Method 202, or other EPA-approved testing method as acceptable to the Director. For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively, appropriate particle sizing analytical methods, such as x-ray diffraction, scanning electron microscopy, or electron microprobe analysis, may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M, Method 202, or other EPA-approved testing method as acceptable to the Director. [R307-165]
II.B.3.e.8 Volatile Organic Compounds (VOCs) VOC emissions shall be determined using 40 CFR 60, App. A, Method 25A using a flame
ionization analyzer equipped with a methane separator. If such an analyzer is unavailable, VOC
emissions shall be determined simultaneously using two analyzers, with one configured to read only methane. The difference between the total organic detector and the methane detector shall
constitute the VOC measurement. [R307-165]

II.B.3.e.9 HCl HCl emissions shall be determined using 40 CFR 60, Appendix A, Method 26, or 26A or other EPA-approved testing method acceptable to the Director. [R307-401-8] II.B.3.e.10 Results
The results of stack testing shall be submitted to the Director within 60 days of completion of the
testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status. [R307-165]

II.B.4 SOP Plant Requirements
II.B.4.a The following production and operation limits shall not be exceeded:
A. 5,300,000 tons of potash harvested from ponds per rolling 12-month period.
B. 1,680,000 tons of SOP produced per rolling 12-month period.

C. 432,000 tons of KCl used per rolling 12-month period.
[R307-401-8]

II.B.4.a.1 The owner/operator shall demonstrate compliance with the rolling 12-month total for each production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production records shall be determined by operation logs. The records of production shall be kept on a daily basis. [R307-401-8]
II.B.4.b Visible emissions from all outdoor storage silos shall not exceed 10% opacity.

Egress points to the dome silos shall remain closed at all times, except when mobile equipment is
actively entering or exiting the silo during loading or unloading operations. [R307-401-8]

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II.B.4.b.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a monthly basis while loading or unloading operations are occurring at the silo. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director. The opacity determination shall be performed while loading or unloading operations are occurring at the silo. [R307-401-8]
II.B.4.b.2 Recordkeeping The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions were observed, emission point location and
description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR
60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director,
shall be maintained. Documentation of maintenance performed on the silos to ensure they operate as fully enclosed structures when egress points are closed shall also be kept in the log.
[R307-401-8]

II.B.4.c Visible emissions from all outdoor fully enclosed conveyance systems shall not exceed 5% opacity. At all times, the owner/operator shall operate and maintain each affected emission unit as a fully enclosed conveyance system. Each fully enclosed conveyance system shall be fully enclosed on all sides, top, and bottom. All fully enclosed conveyance systems shall be clearly labeled on each conveyor such that an inspector/operator can safely identify equipment at any time. [R307-401-8]
II.B.4.c.1 Monitoring The owner/operator shall conduct a Method 22 performance test, or other EPA-approved testing
method, as acceptable to the Director, according to the following requirements for each affected
emission unit.
A. Conduct a weekly 10-minute visible emissions test of each affected emission unit in
accordance with Method 22 of 40 CFR 60 Appendix A, or other EPA-approved testing method, as acceptable to the Director. The performance test shall be conducted while the
unit is in operation.
B. If any visible emissions are observed from an emission unit, the owner/operator shall
inspect the affected emission unit to determine the cause of visible emissions and initiate
corrective action within 1 hour of the initial survey.
C. If no visible emissions are observed during four consecutive weekly tests, the
owner/operator may decrease the frequency of the visible emissions test required in
paragraph (A) from weekly to monthly. If visible emissions are observed during any
monthly test, the owner/operator shall resume the weekly visible emissions test required
in paragraph (A) and maintain that schedule until no visible emissions are observed in
four consecutive weekly tests.

[R307-401-8]

DAQE-IN109170051-25
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II.B.4.c.2 Recordkeeping The owner/operator shall keep a log of the visible emissions tests that contains the following information: time and date of test, emission point location and description, time of visible emissions, (if observed), results of inspections, time and date corrective actions were initiated, and corrective actions taken. All data required by 40 CFR 60, Appendix A, Method 22, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8] II.B.4.d Visible emissions from the following outdoor operations and equipment shall not exceed 10%
opacity: A. All loadout operations.
B. All storage piles.
C. All material handling operations, which include the following: bins & hoppers, screens, crushers, grinders, and presses.

D. All partially enclosed conveyance systems.
E. All conveyor drop points.
F. All conveyor transfer points.

G. All bin vents.
[R307-401-8]

II.B.4.d.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance with 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9; however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation. [R307-401-8]
II.B.4.d.2 Recordkeeping
The owner/operator shall keep a log of the visual opacity survey(s) containing the following
information: date and time visual emissions were observed, emission point location and
description, time and date of opacity test, and percent opacity. If an opacity determination is
performed, a notation of the determination will be made in the log. All data required by 40 CFR
60, Appendix A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other
EPA-approved testing methods, as acceptable to the Director, shall be maintained. [R307-401-8]

II.B.4.e All partially enclosed conveyance systems shall be clearly labeled on each conveyor such that an inspector/operator can safely identify equipment at any time. [R307-401-8]
DAQE-IN109170051-25
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II.B.4.f Emissions to the atmosphere from the baghouses and wet scrubbers located at the SOP Plant for PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the limits shall be based on an average of 3 test runs and shall include both filterable and condensable emissions (standardized at 68 °F, 29.92 in Hg): Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration (lb/hr) (lb/hr) (grains/dscf) AH-1555 2.61 0.39 0.01 BH-001 0.37 0.37 0.01 BH-002 0.65 0.47 0.01 BH-008 4.25 4.25 0.01 BH-1400 2.78 2.78 0.02 BH-1516 1.46 0.22 0.01 [R307-401-8]
II.B.4.f.1 Testing Frequency Compliance testing shall be done on each emission source at least once every calendar year and
in the same calendar quarter in which the most recent stack test was performed. The Director
may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit.
[R307-401-8]

II.B.4.f.2 Notification The Director shall be notified at least 30 days prior to conducting any required emission testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, the stack to be tested, and the procedures to be used. A pretest conference shall be held if directed by the Director. [R307-165] II.B.4.f.3 Sample Location
The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A,
Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA)
approved access shall be provided to the test location. [R307-165]

II.B.4.f.4 Calculations To determine mass emission rates (lb/hr, etc.), the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director to give the results in the specified units of the emission limitation. [R307-165]
DAQE-IN109170051-25
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II.B.4.f.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days). B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate. C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
II.B.4.f.6 Volumetric Flow Rate
40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the Director. [R307-165]

II.B.4.f.7 PM10/PM2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR 51, Appendix M, Methods 201a, or other EPA-approved testing method, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively, appropriate particle sizing analytical methods, such as x-ray diffraction, scanning electron microscopy, or electron microprobe analysis, may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M, Method 202, or other EPA-approved testing method as acceptable to the Director. [R307-165] II.B.4.f.8 Results
The results of stack testing shall be submitted to the Director within 60 days of completion of the
testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status. [R307-165]

II.B.5 Boiler Requirements
II.B.5.a NOx emissions to the atmosphere from each of the two boilers on site shall not exceed the
following rates and concentrations:

Rate (lbs/hr) Concentration (ppm)

1.30 9.0

Compliance with the limit shall be based on an average of 3 test runs.

[R307-401-8]

DAQE-IN109170051-25
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II.B.5.a.1 Testing Frequency Compliance testing shall be done on each emission source at least once every calendar year and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-401-8] II.B.5.a.2 Notification The Director shall be notified at least 30 days prior to conducting any required emission testing.
A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, the stack to be tested, and the procedures to be used. A pretest conference
shall be held if directed by the Director. [R307-165]
II.B.5.a.3 Sample Location The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access shall be provided to the test location. [R307-165] II.B.5.a.4 Calculations
To determine mass emission rates (lb/hr, etc.) the pollutant concentration as determined by the
appropriate methods specified herein shall be, multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director, to give the results in the specified units
of the emission limitation. [R307-165]

II.B.5.a.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days). B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate. C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165] II.B.5.a.6 Volumetric Flow Rate
40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the
Director. [R307-165]

II.B.5.a.7 Nitrogen Oxides NOx emissions shall be determined using 40 CFR 60 Appendix A, Method 7E, or other EPA-approved testing methods acceptable to the Director. [R307-165]
II.B.5.a.8 Results
The results of stack testing shall be submitted to the Director within 60 days of completion of the
testing. Reports shall clearly identify results as compared to permit limits and indicate
compliance status. [R307-165]

DAQE-IN109170051-25
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II.B.6 Dryer Requirements II.B.6.a Emissions to the atmosphere from each of the three dryers on site (D-501, D-1400, and D-1545)
for NOx shall not exceed 20 ppm at 3% O2. Compliance with the limits shall be based on an average of 3 test runs. [R307-401-8]
II.B.6.a.1 Testing Frequency Compliance testing shall be done on each emission source at least once every three years. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-165] II.B.6.a.2 Notification The Director shall be notified at least 30 days prior to conducting any required emission testing.
A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, the stack to be tested, and the procedures to be used. A pretest conference
shall be held if directed by the Director. [R307-165]
II.B.6.a.3 Sample Location The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access shall be provided to the test location. [R307-165] II.B.6.a.4 Calculations
To determine mass emission rates (lb/hr, etc.), the pollutant concentration as determined by the
appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director to give the results in the specified units
of the emission limitation. [R307-165]

II.B.6.a.5 Source Operation The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous three years. B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate. C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
II.B.6.a.6 Volumetric Flow Rate
40 CFR 60, Appendix A, Method 2, or other EPA approved testing methods acceptable to the
Director. [R307-165]

II.B.6.a.7 Nitrogen Oxides NOx emissions shall be determined using 40 CFR 60 Appendix A, Method 7E, or other EPA-approved testing methods acceptable to the Director. [R307-165]
DAQE-IN109170051-25
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II.B.6.a.8 Results The results of stack testing shall be submitted to the Director within 60 days of completion of the testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status. [R307-165]
II.B.7 Baghouse and Wet Scrubber Requirements
II.B.7.a Each baghouse shall operate within the static pressure range recommended by the manufacturer for normal operations. The static pressure range shall be clearly labeled on each baghouse such that an inspector/operator can safely read the range at any time. Manometer or magnehelic pressure gauges shall be installed to measure the differential pressure across each of the baghouses. The pressure gauges shall be located such that an inspector/operator can safely read the indicator at any time. For baghouses that monitor pressure drop to demonstrate compliance with 40 CFR Part 64, the requirements in this condition shall not apply. [R307-401-8] II.B.7.a.1 Pressure drop readings from each baghouse shall be recorded at least once during each day of
operation. Records documenting these inspections shall be kept in a log and shall include the following:

A. Unit identification;
B. Manufacturer-recommended pressure drop for the unit;
C. Daily pressure drop readings; and

D. Date of bag replacements.
[R307-401-8]

II.B.7.a.2 The pressure gauges of each baghouse shall be calibrated in accordance with the manufacturer's instructions or recommendations at least once every 12 months. Documentation of calibrations shall be maintained for all periods the plant is in operation. [R307-401-8] II.B.7.b Each wet scrubber shall operate within the static pressure range and liquid flow rate
recommended by the manufacturer for normal operations. These parameters shall be clearly
labeled on each scrubber such that an inspector/operator can safely read the parameters at any time. Manometers or magnehelic pressure gauges shall be installed to measure the differential
pressure across the wet scrubber. Flow rate meters shall be installed to measure the liquid flow
rate in the scrubber. The pressure gauges and flow rate meters shall be located such that an inspector/operator can safely read the indicators at any time.

For scrubbers that are subject to 40 CFR Part 64, the requirements in this condition shall not apply. [R307-401-8]

II.B.7.b.1 Pressure drop and liquid flow rate readings from each wet scrubber shall be recorded at least once during each day of operation. Records documenting these inspections shall be kept in a log and shall include the following: A. Unit identification; B. Manufacturer-recommended pressure drop and liquid flow rate for the unit; C. Daily pressure drop readings; and D. Daily liquid flow rate readings. [R307-401-8]
DAQE-IN109170051-25
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II.B.7.b.2 The gauges and meters on each wet scrubber shall be calibrated in accordance with the manufacturer's instructions or recommendations at least once every 12 months. Documentation of calibrations shall be maintained for all periods the plant is in operation. For scrubbers that monitor liquid flow rate to demonstrate compliance with 40 CFR Part 64, the liquid flow rate requirements in this condition shall not apply. All other requirements in this condition remain applicable. [R307-401-8]
II.B.8 Engine Requirements
II.B.8.a Visible emissions from diesel-fired emergency generator engines shall not exceed 20% opacity. [R307-401-8]
II.B.8.a.1 Monitoring A visual opacity survey of each affected emission unit shall be performed on a quarterly basis while the unit is operating by an individual trained on the observation procedures of 40 CFR 60,
Appendix A, Method 9. If visible emissions other than steam are observed from an emission unit, a 6-minute opacity determination of that emission unit shall be performed by a certified observer
within 1 hour of the initial survey. The opacity determination shall be performed while the unit is
operating in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director. If the generator(s) continue to operate on consecutive days
following the initial observation, a 6-minute opacity determination shall be performed by a
certified observer on a daily basis, while the unit is operating, in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director.
[R307-401-8]

II.B.8.a.2 Recordkeeping The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions were observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]
II.B.8.b Visible emissions from propane-fired emergency generator engines shall not exceed 10%
opacity. [R307-401-8]
II.B.8.b.1 Monitoring In lieu of monitoring via visible emission observations, records shall be kept for any period that a fuel other than propane is used in the affected emission unit. [R307-401-8]
II.B.8.b.2 Recordkeeping
Records shall be kept in a log that is kept in a readily accessible location onsite. [R307-401-8]
II.B.8.c The owner/operator shall use the emergency generator engines for electricity-producing operations only during the periods when electric power from the public utilities is interrupted. [R307-401-8]
II.B.8.d The owner/operator shall track hours of operation for each emergency generator engine as
required to comply with all applicable federal subparts.
[40 CFR 60 Subpart IIII, 40 CFR 60 Subpart JJJJ, 40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.9 Fuel Requirements
II.B.9.a The owner/operator shall only use diesel fuel (fuel oil #1, #2, or diesel fuel oil additives) in the
diesel-fired engines on site. All diesel burned shall contain no more than 15 ppm sulfur.
[R307-401-8]

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II.B.9.a.1 To demonstrate compliance with the diesel fuel requirements for any diesel fuel purchased, the owner/operator shall keep and maintain fuel purchase invoices. The fuel purchase invoices shall indicate that the diesel fuel meets the sulfur requirements, or the owner/operator shall obtain certification of sulfur content from the fuel supplier. [R307-401-8]
II.B.9.b The owner/operator shall only use propane as fuel in the propane-fired engines on site. [R307-401-8]
II.B.9.c The owner/operator shall use only pipeline-quality natural gas as a fuel source for all boilers and burners. [R307-401-8] II.B.10 Haul Roads and Fugitive Dust Requirements
II.B.10.a The owner/operator shall comply with all applicable requirements of R307-309 for PM10 and PM2.5 non-attainment areas for fugitive emissions and fugitive dust sources. At least once every three years, the fugitive dust control plan shall be reviewed and evaluated. If site modifications that result in emission changes have been made, an updated fugitive dust control plan shall be submitted as required by R307-309-6(3). [R307-309, R307-401-8]
II.B.10.b Visible emissions in disturbed, operational areas and unpaved haul roads from haul trucks and
other mobile equipment shall not exceed 20% opacity at any point. [R307-401-8]
II.B.10.b.1 In lieu of monitoring via visible emissions observations, adherence to the most recently approved fugitive dust control plan shall be monitored to demonstrate that the opacity limit is not exceeded and that appropriate measures are being implemented to control fugitive dust. [R307-309, R307-401-8]
II.B.10.c Vehicle speeds shall be limited to 30 miles per hour on haul roads and 15 miles per hour in off-road areas. The vehicle speed limits shall be clearly visible and posted, at a minimum, on-site at
the entrance to off-road areas and the beginning of the haul road. [R307-401-8]

II.B.10.d The owner/operator shall spray all unpaved haul roads with water, brine, or a chemical suppressant to control fugitive dust and maintain the opacity limit listed in this AO. [R307-401-8] II.B.10.d.1 Records of water or chemical treatment shall be kept for all periods when the plant is in
operation. The owner/operator may stop applying suppressants when the temperature is below
freezing. The records shall include the following:
A. Date.
B. Location of treatment.

C. Rainfall received, if any, and approximate amount.
D. Records of temperature if the temperature is below freezing.

[R307-401-8]

DAQE-IN109170051-25
Page 27

PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents: Supersedes AO DAQE-AN109170049-24 dated May 8, 2024 Is Derived From NOI dated September 10, 2024 Incorporates Additional Information dated May 2, 2025

DAQE-IN109170051-25
Page 28

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:
compass minerals
Notice Authentication Number:
202508060907335192174
2830248745
Notice URL:
Back
Notice Publish Date:
Wednesday, August 06, 2025
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: Compass Minerals Ogden Inc. Location: Compass Minerals Ogden Inc. -
Production Plant - 765 North 10500 West, Ogden, UT Project Description: Compass Minerals has requested to replace an emergency
generator with an engine from their West Desert facility. Engine OGN007 will be replaced with OGN003. This will result in a small decrease in
NOx and SO2 emissions and a small increase in CO emissions. The removal of crusher OCR503 is also documented in this project, which
resulted in a minor reduction in particulate emissions. 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 September 5, 2025, 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: August 6, 2025 Legal Notice 14359 Published in the
Standard Examiner on August 6, 2025
Back

DAQE-NN109170051-25

August 4, 2025

Ogden Standard Examiner
Legal Advertising Dept.
P.O. Box 12790332 Standard Way
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 August 6, 2025.

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: Weber County
cc: Wasatch Front Regional Council

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

Tim Davis
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

DAQE-NN109170051-25
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: Compass Minerals Ogden Inc.
Location: Compass Minerals Ogden Inc. - Production Plant – 765 North 10500 West,
Ogden, UT
Project Description: Compass Minerals has requested to replace an emergency generator with an
engine from their West Desert facility. Engine OGN007 will be replaced with
OGN003. This will result in a small decrease in NOx and SO2 emissions and a
small increase in CO emissions. The removal of crusher OCR503 is also
documented in this project, which resulted in a minor reduction in particulate
emissions.

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 September 5, 2025, 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: August 6, 2025

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

DAQE-

RN109170051 May 28, 2025 Ian Wright
Compass Minerals Ogden Inc. 9900 W 109th St. Overland Park, KS 66210
[e-mail] Dear Ian Wright,
Re: Engineer Review: Modification to Approval Order DAQE-AN109170049-24 to Update Equipment Project Number: N109170051 Please review and sign this letter and attached Engineer Review (ER) within 10 business days. For this document to be considered as the application for a Title V administrative amendment, a Title V Responsible Official must sign the next page. Please contact Stockton Antczak at [phone] if you have any questions or concerns about the ER. If you accept the contents of this ER, please email this signed cover letter to Stockton Antczak at [e-mail]. After receipt of the signed cover letter, the DAQ will prepare an Intent to Approve (ITA) for a 30-day public comment period. When the public comment period ends, the DAQ will consider any comments received and will issue the Approval Order. If you do not respond to this letter within 10 business days, the project will move forward without your approval. If you have concerns that we cannot resolve, the DAQ Director may issue an Order prohibiting
construction.
Approval Signature 7/25/2025________________________________
(Signature & Date)
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
Tim Davis Executive Director DIVISION OF AIR QUALITY Bryce C. Bird Director
State of Utah
SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 1
OPTIONAL: In order for this Engineer Review and associated Approval Order conditions to be considered as an application to administratively amend your Title V Permit, the Responsible Official, as
defined in R307-415-3, must sign the statement below. THIS IS STRICTLY OPTIONAL. If you do not want the Engineer Review to be considered as an application to administratively amend your Operating Permit only the approval signature above is required. Failure to have the Responsible Official sign below will not delay the Approval Order, but will require submittal of a separate Operating Permit Application to revise the Title V permit in accordance with R307-415-5a through 5e and R307-415-7a through 7i. A guidance document: Title V Operating Permit Application Due Dates clarifies the required due dates for Title V operating permit applications and can be viewed at:
https://deq.utah.gov/air-quality/permitting-guidance-and-guidelines-air-quality “Based on information and belief formed after reasonable inquiry, I certify that the statements and information provided for this Approval Order are true, accurate and complete and request that this Approval Order be considered as an application to administratively amend the Operating Permit.”
Responsible Official ____07/25/2025 (Signature & Date) Print Name of Responsible Official _______Brandon Risner______________________________

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 2
UTAH DIVISION OF AIR QUALITY
ENGINEER REVIEW

SOURCE INFORMATION
Project Number N109170051 Owner Name Compass Minerals Ogden Inc.
Mailing Address 9900 W 109th St. Overland Park, KS, 66210
Source Name Compass Minerals Ogden Inc. - Production Plant Source Location 765 N 10500 W Ogden, UT 84404-0000
UTM Projection 396,869 m Easting, 4,570,651 m Northing UTM Datum NAD27 UTM Zone UTM Zone 12 SIC Code 2819 (Industrial Inorganic Chemicals, NEC) Source Contact Ian Wright Phone Number [phone] Email [e-mail] Billing Contact Ian Wright
Phone Number 801-732-3301 Email [e-mail]
Project Engineer Stockton Antczak, Engineer Phone Number [phone] Email [e-mail]
Notice of Intent (NOI) Submitted September 10, 2024 Date of Accepted Application May 28, 2025

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 3
SOURCE DESCRIPTION General Description
Compass Minerals Ogden Inc. (Compass) harvests and processes salt and minerals from the Great Salt Lake to produce sulfate of potash (SOP), salt, and magnesium chloride.
NSR Classification: Minor Modification at Major Source Source Classification Located in the Northern Wasatch Front O3 NAA, and Salt Lake City UT PM2.5 NAA, Weber County Airs Source Size: A Applicable Federal Standards

Project Proposal Modification to Approval Order DAQE-AN109170049-24 to Update Equipment Project Description Compass Minerals has requested to replace an emergency generator with an engine from their West Desert facility. Engine OGN007 will be replaced with OGN003. This will result in a small decrease in NOx and SO2 emissions and a small increase in CO emissions. The removal of crusher OCR503 is also documented in this project, which resulted in a minor reduction in particulate
emissions. EMISSION IMPACT ANALYSIS
The changes in emissions for this project are not significant enough to trigger any modeling thresholds. No modeling is required at this time. [Last updated May 23, 2025]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 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)

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Change (TPY) Total (TPY)

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

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 5
Review of BACT for New/Modified Emission Units BACT review regarding Project BACT
The new emergency engine (OGN003) will be under the same BACT requirement and limitations as the previous engine. No new BACT analysis is needed at this time. [Last updated May 28, 2025]

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):
the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to those rules. [R307-101]
emissions covered by this AO must be reviewed and approved. [R307-401-1]
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]
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]
[R307-107]
150]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 6
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.1
Salt, Magnesium Chloride, and SOP
Dryer 501 (D-501) Location: Salt Plant
Capacity: 51 MMBtu/hr Fuel Type: Natural Gas Controlled by wet scrubber (AH-513)
Dryer 1400 (D-1400) Location: SOP Plant Capacity: 51 MMBtu/hr
Fuel Type: Natural Gas Controlled by baghouse (BH-1400)
Dryer 1545 (D-1545) Location: SOP Plant - Compaction Capacity: 30 MMBtu/hr Fuel Type: Natural Gas Controlled by baghouse (BH-008)
Wet Scrubber (AH-500) Location: Salt Plant Controls: Coolers, Bins & Hoppers, Conveyors, Crushers & Grinders, Feeders & Baggers, Mixers, Presses, and Rail Loading Mechanically Aided
Baghouse (BH-501)
Location: Salt Plant Controls: Fluidized bed cooler

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 7
Wet Scrubber (AH-502) Location: Salt Plant Controls: Bins & Hoppers, Conveyors, Elevators, and Screens
Mechanically Aided
Baghouse (BH-502) Location: Salt Plant Controls: Bins & Hoppers, Elevators, and truck loading operations
Baghouse (BH-503) Location: Salt Plant Controls: Material handling in the salt special products system
Baghouse (BH-505) Location: Salt Plant Controls: Material handling in the salt packing area
Equipped with HEPA Filter and vented indoors.
Wet Scrubber with Cyclone (AH-513) Location: Salt Plant Controls: Salt Dryer (D-501) Mechanically Aided with Variable Frequency Drive (VFD)
Venturi Wet Scrubber (AH-692) Location: Magnesium Chloride Plant Controls: Bins & Hoppers, Conveyors, Crushers & Grinders, Elevators, Feeders & Baggers, and Screens
Baghouse (BH-001)
Location: SOP Plant Controls: Bins & Hoppers, Screens, and Truck and Rail loading operations
Baghouse (BH-002)
Location: SOP Plant Controls: Bins & Hoppers, Conveyors, Elevators, and Screens
Baghouse with Cyclone (BH-008) Location: SOP Plant Controls: Conveyor and SOP Compaction Dryer (D-1545)
Baghouse with Cyclones (BH-1400) Location: SOP Plant Controls: Bins & Hoppers, Conveyors, Elevators, Screens, and SOP Dryer (D-1400)
Bin Vent Filter (BH-1505) Location: SOP Plant
Controls: Bins & Hoppers

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 8
Baghouse (BH-1516) Location: SOP Plant Controls: Bins & Hoppers, Conveyors, Elevators, and Screens

Wet Scrubber (AH-1555) Location: SOP Plant
Controls: Bins & Hoppers, Conveyors, and Elevators Mechanically Aided with VFD
Two Boilers Capacity: 108.11 MMBtu/hr (each) Fuel Type: Natural Gas Installed Controls: Ultra-Low NOx burner and flue gas re-circulation
Monitoring: Continuous Emission Monitoring System (CEMS) NSPS Applicability: Subpart Db
Submerged Combustion Water Heater (SC-450) Location: SOP Plant Capacity: 30 MMBtu/hr Fuel: Natural Gas
Submerged Combustion Water Heater (SC-460)
Location: SOP Plant Capacity: 60 MMBtu/hr Fuel: Natural Gas
Four Magnesium Chloride Evaporators Two operating units with one primary and one secondary evaporator each Location: Magnesium Chloride Plant
Two Cooling Towers (CT-003 & CT-004) Location: SOP Plant Re-circulation rate: 1500 gpm
Cooling Tower (CT-639) Location: Magnesium Chloride Plant Re-circulation rate: 212 gpm
Abrasive Blasting Capacity: 50 lb/hr
Emergency Generator Engine (GN-100) Rating: 610 hp
Fuel: Diesel NSPS Applicability: Subpart IIII MACT Applicability: Subpart ZZZZ

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 9
Emergency Generator Engines (GN-200 & GN-300) Quantity: Two Rating: 41 hp
Fuel: Propane NSPS Applicability: Subpart JJJJ MACT Applicability: Subpart ZZZZ
Emergency Generator Engine (GN-1200) Rating: 402 hp Fuel: Diesel NSPS Applicability: Subpart IIII MACT Applicability: Subpart ZZZZ
Emergency Generator Engine (GN-1300) Rating: 161 hp Fuel: Diesel NSPS Applicability: Subpart IIII MACT Applicability: Subpart ZZZZ
Emergency Generator Engine (GN-003) Rating: 145 hp Fuel: Diesel
MACT Applicability: Subpart ZZZZ
Emergency Generator Engine (GN-500) Rating: less than 100 hp
Fuel: Propane NSPS Applicability: Subpart JJJJ MACT Applicability: Subpart ZZZZ
Cooling Belt Fan (AH-696) Location: Magnesium Chloride Plant
Fuel Tanks Fuel: Gasoline Quantity: One Capacity: 6,000 gallons Fuel: Diesel Quantity: Two Capacity: 10,000 gallons (each)
SOP Silo Building Various Storage Silos Quantity: 11 Location: SOP Plant Controls: Fifteen dust torit cartridge filters; internally vented
Dome Silos (12, 13, and 14) Location: SOP Plant

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 10
Fully Enclosed Conveyors Location: SOP Plant ID's: OC014, OC015, OC1404, OC1405, OC1406, OC1501, OC1550A, OC283, OC284,
OC294, OC298, OF012, OF013
Partially Enclosed Conveyors Location: SOP Plant ID: OC276, OC277/214, OC279, OC280, OC281
Location: Salt Plant
ID: OC503
Various Conveyors and Bucket Elevators Location: Facility Wide
Various Bins and Hoppers Location: Facility Wide
Various Screens, Grinders, and Crushers
Fortress Equipment Two hoppers controlled by baghouse Two mixing tanks

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):
II.B.1
II.B.1.a Unless otherwise specified in this AO, visible emissions from any stationary and fugitive emission source shall not exceed 10 percent opacity. This includes, but is not limited to, all wet scrubbers and all baghouses. [R307-401-8]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 11
A. Except as noted in B through D below, a visual opacity survey of each affected
emission unit shall be performed on a monthly basis while the unit is operating. For baghouses subject to 40 CFR Part 64, the owner/operator shall designate one of the weekly opacity surveys to demonstrate compliance with the monthly survey requirement in this condition. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources.
B. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9, however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation.
C. For emission units located within a building, the requirements of paragraph A apply to each affected emission unit located within a building or for the building itself. If visible
emissions from a building are monitored, the requirements of paragraph A apply to each side, roof, and vent of the building. The affected emission unit(s) shall be operating when monitoring is performed on the unit located within a building or on the building itself.
D. The owner/operator is not required to perform monthly surveys on natural gas combustion sources, cooling towers, magnesium chloride evaporators, and petroleum storage tanks. [R307-401-8]
The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, shall be maintained.
[R307-401-8]
Salt Plant Requirements

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 12
A. 700,000 tons of road salt produced per rolling 12-month period
B. 960,000 tons of dried salt produced per rolling 12-month period [R307-401-8]
production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production records shall be determined by examination of sales, billing records, or operation logs. The records of production shall be kept on a daily basis. [R307-401-8]
opacity:
A. All loading operations
B. All conveyor drop points
C. All conveyor transfer points D. All bin vents E. All storage piles F. All partially enclosed conveyance systems G. All material handling operations which includes the following: bins & hoppers,
screens, crushers, grinders, and presses [R307-401-8]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 13
A visual opacity survey of each affected emission unit shall be performed on a monthly basis
while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9, however, the
requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation.
[R307-401-8]
The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60,
Appendix A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]
for PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the limits shall be based on an average of 3 test runs and shall include both filterable and condensable emissions (standardized at 68 °F, 29.92 in Hg):
Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration
(lb/hr) (lb/hr) (grains/dscf)
AH-500 1.61 1.61 0.01
AH-502 1.12 0.74 0.04 AH-513 1.49 1.49 0.0114 BH-501 1.30 1.15 0.01
BH-502 0.20 0.06 0.0053 BH-503 1.54 0.23 0.01 [R307-401-8]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 14
Compliance testing shall be done on each emission source at least once every calendar year
and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit.
[R307-401-8]
The Director shall be notified at least 30 days prior to conducting any required emission testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, stack to be tested, and procedures to be used. A pretest
conference shall be held, if directed by the Director. [R307-165]
The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access shall be provided to the test location.
[R307-165]
To determine mass emission rates (lb/hr, etc.) the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director, to give the results in the specified
units of the emission limitation. [R307-165]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 15
The production rate during all compliance testing shall be no less than 90% of the permitted
production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days).
B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate.
C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
40 CFR 60, Appendix A, Method 2 or other EPA approved testing methods acceptable to the Director. [R307-165]
10 2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR 51, Appendix M, Methods 201a, or other EPA-approved testing method, as acceptable to the
Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director.
For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively, appropriate particle sizing analytical methods, such as: x-ray diffraction, scanning electron
microscopy, or electron microprobe analysis may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as
acceptable to the Director.
[R307-165]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 16
The results of stack testing shall be submitted to the Director within 60 days of completion of
the testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status. [R307-165]
[R307-401-8]
Magnesium Chloride Plant Requirements
A. 1,000,000 tons of magnesium chloride liquid produced from ponds per rolling 12-month period B. 70,080 tons of magnesium chloride flake produced per rolling 12-month period
[R307-401-8]
production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for
all periods when the plant is in operation. Production records shall be determined by examination of sales, billing records, or operation logs. The records of production shall be kept on a daily basis. [R307-401-8]
opacity: A. All loading operations B. All conveyor drop points
C. All conveyor transfer points
D. All storage piles
E. All partially enclosed conveyance systems
F. All material handling operations which includes the following: bins & hoppers, screens, crushers, grinders, and presses
[R307-401-8]

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A visual opacity survey of each affected emission unit shall be performed on a monthly basis
while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9, however, the
requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation.
[R307-401-8]
The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60,
Appendix A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]
only operate one set of two evaporators at any one time. [R307-401-8]
evaporators per rolling 12-month period. Periods of startup, steady-state, and shutdown are to be included in this limit. Steam cleaning operations, where no chlorine is being added to the evaporators, are not considered part of this operational limit. [R307-401-8]
the hours of operation for each set of evaporators. The owner/operator shall calculate a new
12-month total by the 20th day of each month using data from the previous 12 months. Records of the hours of operation shall be kept for all periods when the plant is in operation. The records of operation shall be kept on a daily basis, and include startup, steady-state, and
shutdown operational times. [R307-401-8]

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for PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the limits shall be based on an average of 3 test runs and shall include both filterable and
condensable emissions (standardized at 68 °F, 29.92 in Hg):
Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration
(lb/hr) (lb/hr) (grains/dscf) AH-692 0.15 0.12 0.01 Combined emissions to the atmosphere from each set of two Magnesium Chloride Plant Evaporators for VOC and HCl shall not exceed the following rates. Compliance with the limit shall be based on an average of 3 test runs:
Emission Point VOC Emission Rate HCl Emission Rate
(lb/hr) (lb/hr)
MgCl2 Evaporators 6.18 6.40
[R307-401-8]
Compliance testing for AH-692 shall be performed at least once every calendar year and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. Compliance testing for both VOC and HCl shall be performed at least once every three years for each train of the Magnesium Chloride Evaporators. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-165]
The Director shall be notified at least 30 days prior to conducting any required emission testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, stack to be tested, and procedures to be used. A pretest conference shall be held, if directed by the Director.
[R307-165]
The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration
(MSHA) approved access shall be provided to the test location.
[R307-165]

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To determine mass emission rates (lb/hr, etc.) the pollutant concentration as determined by the
appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director, to give the results in the specified units of the emission limitation.
[R307-165]
The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days) for the AH-692 scrubber, or the previous three (3) years for the magnesium chloride evaporators.
B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate.
C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum
production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]
40 CFR 60, Appendix A, Method 2 or other EPA approved testing methods acceptable to the Director.
[R307-165]

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10 2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR
51, Appendix M, Methods 201a, or other EPA-approved testing method, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively,
appropriate particle sizing analytical methods, such as: x-ray diffraction, scanning electron microscopy, or electron microprobe analysis may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. [R307-165]
VOC emissions shall be determined using 40 CFR 60, App. A, Method 25A using a flame ionization analyzer equipped with a methane separator. If such an analyzer is unavailable,
VOC emissions shall be determined simultaneously using two analyzers, with one configured to read only methane. The difference between the total organic detector and the methane detector shall constitute the VOC measurement.
[R307-165]
HCl emissions shall be determined using 40 CFR 60, Appendix A, Method 26, or 26A or other EPA-approved testing method, acceptable to the Director.
[R307-401-8]
The results of stack testing shall be submitted to the Director within 60 days of completion of the testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status.
[R307-165]
SOP Plant Requirements

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 21
A. 5,300,000 tons of potash harvested from ponds per rolling 12-month period
B. 1,680,000 tons of SOP produced per rolling 12-month period C. 432,000 tons of KCl used per rolling 12-month period [R307-401-8]
production limit. The owner/operator shall calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. Records of production shall be kept for all periods when the plant is in operation. Production records shall be determined by
operation logs. The records of production shall be kept on a daily basis. [R307-401-8]
Egress points to the dome silos shall remain closed at all times, except when mobile equipment is actively entering or exiting the silo during loading or unloading operations. [R307-401-8]
A visual opacity survey of each affected emission unit shall be performed on a monthly basis while loading or unloading operations are occurring at the silo. The visual opacity survey
shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours
of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director. The opacity determination shall be performed while loading or unloading operations
are occurring at the silo. [R307-401-8]
The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a
notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. Documentation of maintenance performed on the silos to ensure they
operate as fully enclosed structures when egress points are closed shall also be kept in the log. [R307-401-8]

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opacity. At all times, the owner/operator shall operate and maintain each affected emission unit as a fully enclosed conveyance system. Each fully enclosed conveyance system shall be fully enclosed on all sides, top, and bottom. All fully enclosed conveyance systems shall be clearly labeled on each conveyor such that an inspector/operator can safely identify equipment at any time. [R307-401-8]
The owner/operator shall conduct a Method 22 performance test, or other EPA-approved testing method, as acceptable to the Director, according to the following requirements for each
affected emission unit. A. Conduct a weekly 10-minute visible emissions test of each affected emission unit in accordance with Method 22 of 40 CFR 60 Appendix A, or other EPA-approved testing method, as acceptable to the Director. The performance test shall be conducted while the unit
is in operation. B. If any visible emissions are observed from an emission unit, the owner/operator shall inspect the affected emission unit to determine the cause of visible emissions and initiate corrective action within 1 hour of the initial survey.
C. If no visible emissions are observed during four consecutive weekly tests, the owner/operator may decrease the frequency of the visible emissions test required in paragraph (A) from weekly to monthly. If visible emissions are observed during any monthly test, the owner/operator shall resume the weekly visible emissions test required in paragraph (A) and maintain that schedule until no visible emissions are observed in four consecutive weekly tests. [R307-401-8]
The owner/operator shall keep a log of the visible emissions tests that contains the following information: time and date of test, emission point location and description, time of visible emissions, if observed, results of inspections, time and date corrective actions initiated, and corrective actions taken. All data required by 40 CFR 60, Appendix A, Method 22, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 23
opacity: A. All loadout operations B. All storage piles
C. All material handling operations which includes the following: bins & hoppers, screens, crushers, grinders, and presses D. All partially enclosed conveyance systems
E. All conveyor drop points
F. All conveyor transfer points
G. All bin vents [R307-401-8]
A visual opacity survey of each affected emission unit shall be performed on a monthly basis while the unit is operating. The visual opacity survey shall be performed by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than condensed water vapor are observed from an emission unit, an opacity determination of that emission unit shall be performed by a certified observer within 24 hours of the initial survey. The opacity determination shall be performed in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, for point sources, and in accordance 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, for fugitive sources. For intermittent sources, opacity observations shall be performed on a monthly basis while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9, however, the requirement for observations to be made at 15 second intervals over a six-minute period shall not apply. The number of observations and the time period shall be determined by the length of the intermittent source operation. [R307-401-8]
The owner/operator shall keep a log of the visual opacity survey(s) containing the following information: date and time visual emissions observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9 and/or 40 CFR 51 Appendix M, Method 203A, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]

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an inspector/operator can safely identify equipment at any time. [R307-401-8]
for PM10 and PM2.5 shall not exceed the following rates and concentrations. Compliance with the limits shall be based on an average of 3 test runs and shall include both filterable and condensable emissions (standardized at 68 °F, 29.92 in Hg): Emission Point PM10 Emission Rate PM2.5 Emission Rate PM2.5 Concentration
(lb/hr) (lb/hr) (grains/dscf)
AH-1555 2.61 0.39 0.01 BH-001 0.37 0.37 0.01 BH-002 0.65 0.47 0.01 BH-008 4.25 4.25 0.01
BH-1400 2.78 2.78 0.02 BH-1516 1.46 0.22 0.01 [R307-401-8]
Compliance testing shall be done on each emission source at least once every calendar year and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-401-8]
The Director shall be notified at least 30 days prior to conducting any required emission testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, stack to be tested, and procedures to be used. A pretest conference shall be held, if directed by the Director.
[R307-165]
The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access shall be provided to the test location. [R307-165]

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To determine mass emission rates (lb/hr, etc.) the pollutant concentration as determined by the
appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director, to give the results in the specified units of the emission limitation.
[R307-165]
The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days). B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate. C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This
process may be repeated until the maximum permitted production rate is achieved. [R307-165]
40 CFR 60, Appendix A, Method 2 or other EPA approved testing methods acceptable to the Director. [R307-165]

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10 2.5 For stacks in which no liquid drops are present, the following methods shall be used: 40 CFR
51, Appendix M, Methods 201a, or other EPA-approved testing method, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. For stacks in which liquid drops are present, methods to eliminate the liquid drops should be explored. If no reasonable method to eliminate the drops exists, then the following methods shall be used: 40 CFR 60, Appendix A, Method 5, 5a, 5d, 5i, or other EPA approved testing methods as acceptable to the Director. When demonstrating compliance with the PM10 and PM2.5 limits above, all filterable particulate emissions captured using Method 5 shall be considered PM2.5, resulting in PM10 emissions equal to that of PM2.5. Alternatively,
appropriate particle sizing analytical methods, such as: x-ray diffraction, scanning electron microscopy, or electron microprobe analysis may be used to determine particle sizing, as acceptable to the Director. The back half condensable particulate emissions shall also be tested using 40 CFR 51, Appendix M Method 202, or other EPA-approved testing method as acceptable to the Director. [R307-165]
The results of stack testing shall be submitted to the Director within 60 days of completion of the testing. Reports shall clearly identify results as compared to permit limits and indicate
compliance status. [R307-165]
Boiler Requirements
xfollowing rates and concentrations:
Rate (lbs/hr) Concentration (ppm)
1.30 9.0 Compliance with the limit shall be based on an average of 3 test runs.
[R307-401-8]
Compliance testing shall be done on each emission source at least once every calendar year and in the same calendar quarter in which the most recent stack test was performed. The Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit.
[R307-401-8]

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The Director shall be notified at least 30 days prior to conducting any required emission
testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, stack to be tested, and procedures to be used. A pretest conference shall be held, if directed by the Director. [R307-165]
The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration
(MSHA) approved access shall be provided to the test location. [R307-165]
To determine mass emission rates (lb/hr, etc.) the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director, to give the results in the specified units of the emission limitation.
[R307-165]
The production rate during all compliance testing shall be no less than 90% of the permitted production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed:
A. Testing shall be at no less than 90% of the production rate achieved in the previous 12 months (365 days).
B. If the test is passed, the new maximum allowable production rate shall be 110% of the
tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate.
C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum
production rate (110% of the new rate) will then be allowed if the test is successful. This process may be repeated until the maximum permitted production rate is achieved. [R307-165]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 28
40 CFR 60, Appendix A, Method 2 or other EPA approved testing methods acceptable to the
Director. [R307-165]
NOx emissions shall be determined using 40 CFR 60 Appendix A, Method 7E, or other EPA-approved testing method, acceptable to the Director. [R307-165]
The results of stack testing shall be submitted to the Director within 60 days of completion of the testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status.
[R307-165]
Dryer Requirements
1545) for NOx shall not exceed 20 ppm at 3% O2. Compliance with the limits shall be based on an average of 3 test runs. [R307-401-8]
Compliance testing shall be done on each emission source at least once every three years. The
Director may require testing at any time. If an existing source is modified, a compliance test is required on the modified emission point that has an emission rate limit. [R307-165]
The Director shall be notified at least 30 days prior to conducting any required emission testing. A source test protocol shall be submitted to DAQ. The source test protocol shall be
approved by the Director prior to performing the test(s). The source test protocol shall outline the proposed test methodologies, stack to be tested, and procedures to be used. A pretest conference shall be held, if directed by the Director.
[R307-165]

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The emission point shall be designed to conform to the requirements of 40 CFR 60, Appendix
A, Method 1, or other EPA approved methods acceptable to the Director. An Occupational Safety and Health Administration (OSHA) or Mine Safety and Health Administration (MSHA) approved access shall be provided to the test location.
[R307-165]
To determine mass emission rates (lb/hr, etc.) the pollutant concentration as determined by the appropriate methods specified herein shall be multiplied by the volumetric flow rate and any necessary conversion factors determined by the Director, to give the results in the specified units of the emission limitation.
[R307-165]
The production rate during all compliance testing shall be no less than 90% of the permitted
production rate. If the maximum permitted production rate has not been achieved at the time of the test, the following procedure shall be followed: A. Testing shall be at no less than 90% of the production rate achieved in the previous three (3) years.
B. If the test is passed, the new maximum allowable production rate shall be 110% of the tested achieved rate, but not more than the maximum allowable production rate. This new allowable maximum production rate shall remain in effect until successfully tested at a higher rate. C. Testing at no less than 90% of the higher rate shall be conducted. A new maximum production rate (110% of the new rate) will then be allowed if the test is successful. This
process may be repeated until the maximum permitted production rate is achieved.
[R307-165]
40 CFR 60, Appendix A, Method 2 or other EPA approved testing methods acceptable to the Director. [R307-165]
NOx emissions shall be determined using 40 CFR 60 Appendix A, Method 7E, or other EPA-approved testing method, acceptable to the Director.
[R307-165]

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The results of stack testing shall be submitted to the Director within 60 days of completion of
the testing. Reports shall clearly identify results as compared to permit limits and indicate compliance status. [R307-165]
Baghouse and Wet Scrubber Requirements
manufacturer for normal operations. The static pressure range shall be clearly labeled on each
baghouse such that an inspector/operator can safely read the range at any time. Manometer or magnehelic pressure gauges shall be installed to measure the differential pressure across each of the baghouses. The pressure gauges shall be located such that an inspector/operator can safely read the indicator at any time. For baghouses that monitor pressure drop to demonstrate compliance with 40 CFR Part 64, the requirements in this condition shall not apply. [R307-401-8]
operation. Records documenting these inspections shall be kept in a log and shall include the following:
A. Unit identification; B. Manufacturer recommended pressure drop for the unit; C. Daily pressure drop readings; and D. Date of bag replacements. [R307-401-8]
manufacturer's instructions or recommendations at least once every 12 months. Documentation of calibrations shall be maintained for all periods the plant is in operation. [R307-401-8]
recommended by the manufacturer for normal operations. These parameters shall be clearly labeled on each scrubber such that an inspector/operator can safely read the parameters at any time. Manometer or magnehelic pressure gauges shall be installed to measure the differential pressure across the wet scrubber. Flow rate meters shall be installed to measure the liquid flow rate in the scrubber. The pressure gauges and flow rate meters shall be located such that an inspector/operator can safely read the indicators at any time.
For scrubbers that are subject to 40 CFR Part 64, the requirements in this condition shall not apply. [R307-401-8]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 31
once during each day of operation. Records documenting these inspections shall be kept in a log and shall include the following:
A. Unit identification; B. Manufacturer recommended pressure drop and liquid flow rate for the unit; C. Daily pressure drop readings; and D. Daily liquid flow rate readings.
[R307-401-8]
manufacturer's instructions or recommendations at least once every 12 months. Documentation of calibrations shall be maintained for all periods the plant is in operation.
For scrubbers that monitor liquid flow rate to demonstrate compliance with 40 CFR Part 64,
the liquid flow rate requirements in this condition shall not apply. All other requirements in this condition remain applicable. [R307-401-8]
Engine Requirements
opacity. [R307-401-8]
A visual opacity survey of each affected emission unit shall be performed on a quarterly basis
while the unit is operating by an individual trained on the observation procedures of 40 CFR 60, Appendix A, Method 9. If visible emissions other than steam are observed from an emission unit, a 6-minute opacity determination of that emission unit shall be performed by a
certified observer within 1 hour of the initial survey. The opacity determination shall be performed while the unit is operating in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director. If the generator(s) continue to operate on consecutive days following the initial observation, a 6-minute opacity determination shall be performed by a certified observer on a daily basis, while the unit is operating, in accordance with 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director. [R307-401-8]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 32
The owner/operator shall keep a log of the visual opacity survey(s) containing the following
information: date and time visual emissions observed, emission point location and description, time and date of opacity test, and percent opacity. If an opacity determination is performed, a notation of the determination will be made in the log. All data required by 40 CFR 60, Appendix A, Method 9, or other EPA-approved testing method, as acceptable to the Director, shall be maintained. [R307-401-8]
opacity. [R307-401-8]
In lieu of monitoring via visible emission observations, records shall be kept for any period that a fuel other than propane is used in the affected emission unit. [R307-401-8]
Records shall be kept in a log that is kept in a readily accessible location onsite. [R307-401-8]
operations only during the periods when electric power from the public utilities is interrupted.
[R307-401-8]
required to comply with all applicable federal subparts. [40 CFR 60 Subpart IIII, 40 CFR 60 Subpart JJJJ, 40 CFR 63 Subpart ZZZZ, R307-401-8]
Fuel Requirements
diesel fired engines on site. All diesel burned shall contain no more than 15 ppm sulfur. [R307-401-8]
the owner/operator shall keep and maintain fuel purchase invoices. The fuel purchase invoices shall indicate that the diesel fuel meets the sulfur requirements, or the owner/operator shall obtain certification of sulfur content from the fuel supplier. [R307-401-8]
401-8]
and burners. [R307-401-8]

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Haul Roads and Fugitive Dust Requirements
10PM2.5 non-attainment areas for fugitive emissions and fugitive dust source. At least once every three years, the fugitive dust control plan shall be reviewed and evaluated. If site modifications that result in emission changes have been made, an updated fugitive dust control plan shall be submitted as required by R307-309-6(3). [R307-309, R307-401-8]
other mobile equipment shall not exceed 20% opacity at any point. [R307-401-8]
approved fugitive dust control plan shall be monitored to demonstrate that the opacity limit is not exceeded and that appropriate measures are being implemented to control fugitive dust. [R307-309, R307-401-8]
off-road areas. The vehicle speed limits shall be clearly visible and posted, at a minimum, on site at the entrance to off-road areas and the beginning of the haul road. [R307-401-8]
suppressant to control fugitive dust and maintain the opacity limit listed in this AO. [R307-401-8]
operation. The owner/operator may stop applying suppressants when the temperature is below freezing. The records shall include the following:
A. Date B. Location of treatment C. Rainfall received, if any, and approximate amount D. Records of temperature if the temperature is below freezing.
[R307-401-8]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 34
PERMIT HISTORY When issued, the approval order shall supersede (if a modification) or will be based on the
following documents:

REVIEWER COMMENTS 1. Emergency engine OGN007 is being replaced with OGN003. PTE values were updated to reflect the estimates with the replacement engine. The replacement engine will be operating in the same capacity as the previous engine and will be subject to the same requirements. The removal of crusher OCR503 has also been rolled into this project. This crusher was permanently removed from the site on May 23, 2024. The removal resulted in a minor reduction in particulate emissions. [Last updated May 28, 2025]

Engineer Review N109170051: Compass Minerals Ogden Inc. - Production Plant May 28, 2025 Page 35
ACRONYMS The following lists commonly used acronyms and associated translations as they apply to this document:

Stockton Antczak <[e-mail]>
West Desert and Production Plant Air Quality Permits
2 messages
Stockton Antczak <[e-mail]>Mon, Apr 14, 2025 at 4:46 PM
To: [e-mail]
Ian,
My name is Stockton Antczak. I'm not sure if Jacob let you know, but he moved to another position at the DEQ so I will be
the engineer taking over these projects. I show that you are the contact for the west desert site, but are you also for the
production plant? It is also my understanding that Jacob had asked you for some information for these sites, and you may
have tried sending them to him at his old email. They ended up giving him a new one so his old email is now inactive.
Either way, once you have those documents ready you can send them over to me and I can get things moving along. Feel
free to reach out to me if you have any questions or concerns.
Thanks,
Stockton
--
Stockton J. Antczak | Permitting Engineer | Major New Source Review
385-306-6724 (cell)
195 North 1950 West, Salt Lake City, UT 84116
Ian Wright <[e-mail]>Fri, May 2, 2025 at 2:27 PM
To: Stockton Antczak <[e-mail]>
Cc: Brandon Risner <[e-mail]>, Ken Potts <[e-mail]>
Stockton,

Attached is the updated form packet for the NOI for the generator replacement Compass submitted in September of 2024.
This update reflects the existing emissions limits as reflected on AO 0049 as well as the proposed reductions resulting
from the installation of the new generator. Please feel free to contact me with any questions.

Thank you,

7/28/25, 1:35 PM State of Utah Mail - West Desert and Production Plant Air Quality Permits
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-a:r-8353632249060511678&simpl=msg-a:r-50463029847968…1/2
Ian Wright
Environmental Manager
D: 801.732.3011 M: 385-566-8278
[e-mail]
compassminerals.com
[Quoted text hidden]
2025.01.06_NOI Forms (DAQ-2018-002267) REV 2.pdf
573K
7/28/25, 1:35 PM State of Utah Mail - West Desert and Production Plant Air Quality Permits
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-a:r-8353632249060511678&simpl=msg-a:r-50463029847968…2/2
Stockton Antczak <[e-mail]>
West Desert Air Quality Permit Revew
3 messages
Stockton Antczak <[e-mail]>Tue, Jul 1, 2025 at 8:46 AM
To: Ian Wright <[e-mail]>
Ian,
Sorry for the long delay on this. My engineering review is ready for your approval. Please take a look at the attached
document and let me know if you have any questions or concerns.
Thanks,
Stockton
--
Stockton J. Antczak | Permitting Engineer | Major New Source Review
385-306-6724 (cell)
195 North 1950 West, Salt Lake City, UT 84116
RN124390012.rtf
1502K
Stockton Antczak <[e-mail]>Fri, Jul 18, 2025 at 12:27 PM
To: Ian Wright <[e-mail]>
Ian,
I also wanted to follow up on this project to see if you had been able to review it. Get back to me when you can.
Thanks,
Stockton
[Quoted text hidden]
Ian Wright <[e-mail]>Fri, Jul 18, 2025 at 12:34 PM
To: Stockton Antczak <[e-mail]>
Stockton,

My apologies for the delay. I will review with Brandon Risner on Monday, sign, and return.

Thank you,

7/28/25, 1:36 PM State of Utah Mail - West Desert Air Quality Permit Revew
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-a:r-2941929137662249943&simpl=msg-a:r-84000203258481…1/2
Ian Wright
Environmental Manager
D: 801.732.3011 M: 385-566-8278
[e-mail]
compassminerals.com
[Quoted text hidden]
7/28/25, 1:36 PM State of Utah Mail - West Desert Air Quality Permit Revew
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-a:r-2941929137662249943&simpl=msg-a:r-84000203258481…2/2
Stockton Antczak <[e-mail]>
Production Plant Modification Project
3 messages
Stockton Antczak <[e-mail]>Wed, Jun 4, 2025 at 3:01 PM
To: [e-mail]
Ian,
I have finished my engineering review and I am going to send it through peer review. I just wanted to double check the
PTE values since this project not only includes the engine replacement but also the removal of crusher OCR503 which
was requested in an NOI last year. I wasn't sure how the crusher removal would affect the numbers since I had two
separate NOIs to work with so I wanted to send you my review a little early and have you confirm the PTE values. The
PTE values in the attached review are based on the engine replacement NOI so my main question would be if the PTE
values in the engine replacement NOI included the removal of the crusher or not. If you could take a look at it and let me
know I would appreciate it. Feel free to reach out with any questions.
I have also attached the both NOIs for your reference.
Thanks,
Stockton
--
Stockton J. Antczak | Permitting Engineer | Major New Source Review
385-306-6724 (cell)
195 North 1950 West, Salt Lake City, UT 84116
3 attachments
2024.05.23 CR503 Reduction in Air Contaminants.pdf
50K
RN109170051.rtf
1896K
2025.01.06_NOI Forms (DAQ-2018-002267) REV 2.pdf
573K
Ian Wright <[e-mail]>Mon, Jun 9, 2025 at 1:41 PM
To: Stockton Antczak <[e-mail]>
Stockton,

I have reviewed and the PTE listed on the engineering review looks good. Do I need to sign and send back to you?

7/28/25, 1:38 PM State of Utah Mail - Production Plant Modification Project
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-a:r-101404678109401001&simpl=msg-a:r4521774442929177…1/2

Ian Wright
Environmental Manager
D: 801.732.3011 M: 385-566-8278
[e-mail]
compassminerals.com
[Quoted text hidden]
Stockton Antczak <[e-mail]>Mon, Jun 9, 2025 at 1:44 PM
To: Ian Wright <[e-mail]>
Ian,
No signature needed yet. I just wanted to make sure the PTE was correct. The review still has a bit of peer reviewing
before I will have you sign off.
Thanks,
Stockton
[Quoted text hidden]
7/28/25, 1:38 PM State of Utah Mail - Production Plant Modification Project
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-a:r-101404678109401001&simpl=msg-a:r4521774442929177…2/2
Stockton Antczak <[e-mail]>
Compass Rock Crushing
2 messages
Ian Wright <[e-mail]>Tue, Jul 1, 2025 at 9:45 AM
To: Stockton Antczak <[e-mail]>
Stockton,

To clarify, would the temporary rock crusher fall under Form 15 Rock Crushing and Screening or Form 15c General Permit
Application for Portable Equipment.

Ian Wright
Environmental Manager
D: 801.732.3011 M: 385-566-8278
[e-mail]
compassminerals.com

Stockton Antczak <[e-mail]>Tue, Jul 1, 2025 at 10:08 AM
To: Ian Wright <[e-mail]>
Ian,
I was able to chat with my manager about this and got some clarification. If you are just renting equipment for temporary
use, it does not have to be permitted as long as it does not exceed 180 days of use on site in a year. The few weeks you
anticipate needing it on site would fall well below that. Then, ideally, you would send us a notification when you intend to
have it on site, briefly letting us know the scope and how long you anticipate to have the crusher on site, and we will send
a letter back. Hopefully this makes your life a little easier. Let me know if you have any further questions.
Thanks,
Stockton
[Quoted text hidden]
7/28/25, 1:38 PM State of Utah Mail - Compass Rock Crushing
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-f:1836460019494207535&simpl=msg-f:183646001949420753…1/1
Stockton Antczak <[e-mail]>
Production Plant Air Quality Permit
3 messages
Stockton Antczak <[e-mail]>Thu, Jun 19, 2025 at 3:56 PM
To: Ian Wright <[e-mail]>
Ian,
Attached is my engineering review for the project at the production plant site. This is the same project I sent you before
wanting to confirm the PTE values. Please look it over and let me know if it looks good to you. If you have no questions or
comments, please sign off on it and send it back.
Thanks,
Stockton
--
Stockton J. Antczak | Permitting Engineer | Major New Source Review
385-306-6724 (cell)
195 North 1950 West, Salt Lake City, UT 84116
RN109170051.rtf
1896K
Stockton Antczak <[e-mail]>Fri, Jul 18, 2025 at 12:26 PM
To: Ian Wright <[e-mail]>
Ian,
I wanted to follow up to see if you had had time to review the permit in my previous email. Let me know.
Thanks,
Stockton
[Quoted text hidden]
Ian Wright <[e-mail]>Tue, Jul 22, 2025 at 2:04 PM
To: Stockton Antczak <[e-mail]>
Stockton,

I will have the engineering reviews for you by EOD. Our plant manager is no longer with Compass Minerals, so I will be
having our VP of Operations sign (hence the delay). Thank you for your patience.

7/28/25, 1:38 PM State of Utah Mail - Production Plant Air Quality Permit
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-a:r-6425240774177342092&simpl=msg-a:r-77005481021942…1/2
Ian Wright
Environmental Manager
D: 801.732.3011 M: 385-566-8278
[e-mail]
compassminerals.com
[Quoted text hidden]
7/28/25, 1:38 PM State of Utah Mail - Production Plant Air Quality Permit
https://mail.google.com/mail/u/0/?ik=15596fcb07&view=pt&search=all&permthid=thread-a:r-6425240774177342092&simpl=msg-a:r-77005481021942…2/2
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
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
3.Source name and physical address (if different from
above):____________________________
____________________________
____________________________
Phone 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.
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.
_______________________________________
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 2 CO2e
2
4
2
6
Total CO2e
*Potential to emit to include pollution control equipment as defined by R307-401-2.
Hazardous Air Pollutants** (
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 11 Date___________________________
Internal Combustion Engines
Equipment Information
1. Manufacturer: __________________________
Model no.: __________________________
The date the engine was constructed or
reconstructed ________________________
2. Operating time of Emission Source:
average maximum
______ Hours/day ______ Hours/day
Days/week Days/week
______ Weeks/year ______ Weeks/year
3. Manufacturer's rated output at baseload, ISO hp or Kw
Proposed site operating range _____________________________ hp or Kw
Gas Firing
4. Are you operating site equipment on pipeline quality natural gas: □ Yes □ No
5. Are you on an interruptible gas supply:
□Yes □ No
If "yes", specify alternate fuel:
_______________________________
6. Annual consumption of fuel:
_____________________________ MMSCF/Year
7. Maximum firing rate:
_____________________________ BTU/hr
8. Average firing rate:
_____________________________ BTU/hr
Oil Firing
9. Type of oil:
Grade number □ 1 □ 2 □ 4 □ 5 □ 6 Other specify ___________
10. Annual consumption: ______________ gallons 11. Heat content:______________ BTU/lb or
______________ BTU/gal
12. Sulfur content:___________% by weight 13. Ash content: ____________% by weight
14. Average firing rate: gal/hr 15. Maximum firing rate: gal/hr
16. Direction of firing: □ horizontal □ tangential □ other: (specify)
Page 1 of 4 
Periodic Maintenance Firing
Page 2 of 4 
Internal Combustion Engine
Form 11 (Continued)
Operation
17. Application:
□Electric generation
______ Base load ______ Peaking
□Emergency Generator
□Driving pump/compressor
□Exhaust heat recovery
□Other (specify) ________________________
18. Cycle
□Simple cycle
□Regenerative cycle
□Cogeneration
□Combined cycle
Emissions Data
19. Manufacturer’s Emissions in grams per hour (gr/hp-hr): _______ NOX _______ CO ______ VOC
_______ Formaldehyde
20. Attach manufacturer's information showing emissions of NOx, CO, VOC, SOx, CH2O, PM10, PM 2.5 , CO2, CH4 and N2O
for each proposed fuel at engine loads and site ambient temperatures representative of the range of proposed
operation. The information must be sufficient to determine maximum hourly and annual emission rates. Annual
emissions may be based on a conservatively low approximation of site annual average temperature. Provide emissions
in pounds per hour and except for PM10 and PM2.5 parts per million by volume (ppmv) at actual conditions and corrected
to dry, 15% oxygen conditions.
Method of Emission Control:
□Lean premix combustors □Oxidation catalyst □ Water injection □ Other (specify)____________
□Other low-NOx combustor □SCR catalyst □Steam injection
Additional Information
21. On separate sheets provide the following:
A.Details regarding principle of operation of emission controls. If add-on equipment is used, provide make and
model and manufacturer's information. Example details include: controller input variables and operational
algorithms for water or ammonia injection systems, combustion mode versus engine load for variable mode
combustors, etc.
B. Exhaust parameter information on attached form.
C. All calculations used for the annual emission estimates must be submitted with this form to be deemed
complete.
D.All formaldehyde emissions must be modeled as per Utah Administrative Code R307-410-5 using
SCREEN3.
E. If this form is filled out for a new source, forms 1 and 2 must be submitted also.
Prepared For:
Steve Losee
WHEELER MACHINERY CO
INFORMATION PROVIDED BY CATERPILLAR
Engine:
Horsepower:
RPM:
Compression Ratio:
Exhaust Flow Rate:
Exhaust Temperature:
Reference:
Fuel:
Annual Operating Hours:
Uncontrolled Emissions
NOx:
CO:
THC:
NMHC
NMNEHC:
HCHO:
02:
9ilmQ:br
13.48
13.46
2.20
0.33
0.22
0.27
0.50 %
POST CATALYST EMISSIONS
9ilmQ:br
NOx: <1.00
CO: <2.00
voe: <0.10
G3306 NA
145
1800
10.5
678 CFM
1101 °F
DM5053-07
Natural Gas
8760
Lb/Hr
4.31
4.30
0.70
0.11
0.07
0.09
Tons/Year
18.87
18.85
3.08
0.46
0.31
0.38
2585 Heartland Dr.
Sheridan, \NY 82801
Office: I Direct: +1 [phone]
[e-mail]
QUOTE: QUO-18378-W7N6
Expires: May 08, 2016
CONTROL EQUIPMENT
Catalyst Housing
Model:
Manufacturer:
Element Size:
Housing Type:
Catalyst Installation:
Construction:
Sample Ports:
Inlet Connections:
Outlet Connections:
Configuration:
Silencer:
Silencer Grade:
Insertion Loss:
Estimated Lead Time:
Catalyst Element
Model:
Catalyst Type:
Substrate Type:
Manufacturer:
Element Quantity:
Element Size:
Estimated Lead Time:
EA-1200-0404F-2SEE
EMIT Technologies, Inc
Round 12" x 3.5"
2 Element Capacity
Accessible Housing
1 O gauge Stainless Steel
6 (0.5" NPT)
4" Flat Face Flange
4" Flat Face Flange
End In I End Out
NIA
NIA
NIA
2 Weeks to Ship
RE-1200-T
NSCR, Standard Precious Group Metals
BRAZED
EMIT Technologies, Inc
1
Round 12" x 3.5"
In Stock
The mformatJon 1n Un quotation, and any files transmitted with 1t, is confidential and may be legally prwrleged It ts mtended only for the use of 1ndv1dual(s) w.tt.n the company named above If you are the mtended recipient, be aware that your use of any confidential or
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