DAQ-2024-011114

DAQE-AN143290002-24

{{$d1 }}

Wes Christensen
Christensen Brothers Rock Products
PO Box 191
Fairview, UT 84629
[e-mail]

Dear Mr. Christensen:

Re: Approval Order: Administrative Amendment to Approval Order DAQE-AN0143290001-11 for a
10-Year Review and Permit Updates
Project Number: N143290002

The attached Approval Order (AO) is issued pursuant to the Division of Air Quality conducting a
10-year administrative review of this source and its respective AO. Christensen Brothers Rock
Products must comply with the requirements of this AO, all applicable state requirements (R307), and
Federal Standards.

The project engineer for this action is Katie Andersen, 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.

Sincerely,

{{$s }}

Bryce C. Bird
Director

BCB:KA:jg

cc: Central Utah Health Department

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

SPENCER J. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

October 3, 2024

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

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APPROVAL ORDER
DAQE-AN143290002-24
Administrative Amendment to Approval Order
DAQE-AN0143290001-11 for a 10-Year Review
and Permit Updates

Prepared By
Katie Andersen, Engineer
[phone]
[e-mail]

Issued to
Christensen Brothers Rock Products - Rock Plant

Issued On
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Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality

October 3, 2024
TABLE OF CONTENTS

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

DAQE-AN143290002-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Christensen Brothers Rock Products Christensen Brothers Rock Products - Rock Plant

Mailing Address Physical Address
PO Box 191 11350 East Gravel Pit Road
Fairview, UT 84629 Fairview, UT 84629

Source Contact UTM Coordinates
Name: Wes Christensen 463,014 m Easting
Phone: [phone],381,166 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12
SIC code 1442 (Construction Sand & Gravel)

SOURCE INFORMATION
General Description
Christensen Brothers Rock Products is an aggregate processing plant located at 11350 East Gravel Pit
Road, Fairview, Utah, in Sanpete County. The plant consists of two crushers, two screens, a diesel
generator, miscellaneous conveyors, stackers, and mobile equipment. The source processes up to 140,000
tons of aggregate per year.

NSR Classification
10-Year Review

Source Classification
Located in Attainment Area
Sanpete County
Airs Source Size: B

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), OOO: Standards of Performance for Nonmetallic Mineral Processing Plants
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression 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
Title V (Part 70) Area Source
DAQE-AN143290002-24
Page 4

Project Description
This is a 10-Year Review to update the language, formatting, and layout of the permit to match current
DAQ permitting standards.

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)
CO2 Equivalent 0 316.00
Carbon Monoxide 0 1.83
Nitrogen Oxides 0 8.49
Particulate Matter - PM10 0 4.48
Particulate Matter - PM2.5 0 1.01
Sulfur Dioxide 0 0.56
Volatile Organic Compounds 0 0.74

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Acetaldehyde (CAS #75070) 0 3
Benzene (Including Benzene From Gasoline) (CAS #71432) 0 2
Formaldehyde (CAS #50000) 0 5
Generic HAPs (CAS #GHAPS) 0 8
Toluene (CAS #108883) 0 1
Xylenes (Isomers And Mixture) (CAS #1330207) 0 1
Change (TPY) Total (TPY)
Total HAPs 0 0.01

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]
DAQE-AN143290002-24
Page 5

I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators shall, to the extent practicable, maintain and operate any equipment approved under this AO, including associated air pollution control equipment, in a manner consistent with good air pollution control practice for minimizing emissions. Determination of whether acceptable operating and maintenance procedures are being used will be based on information available to the Director which may include, but is not limited to, monitoring results, opacity observations, review of operating and maintenance procedures, and inspection of the source. All maintenance performed on equipment authorized by this AO shall be recorded. [R307-401-4] I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns. [R307-107]

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

SECTION II: PERMITTED EQUIPMENT
II.A THE APPROVED EQUIPMENT II.A.1 Fairview Aggregate Pit
II.A.2 Jaw Crusher Maximum rated capacity: 500 tons per hour (tph) II.A.3 Cone Crusher Maximum rated capacity: 500 tph
II.A.4 Two Screens Maximum rated capacity: 500 tph each II.A.5 Various Conveyors, Stackers, and Feeders
II.A.6 Diesel Generator Maximum rated capacity: 410 kW (245 hp) Manufacture date: 2007 II.A.7 Off-road Mobile Equipment* Miscellaneous front-end loader(s), bulldozer(s), water truck(s), etc. * Note: The equipment is listed for informational purposes only.

SECTION II: SPECIAL PROVISIONS
II.B REQUIREMENTS AND LIMITATIONS
II.B.1 The Fairview pit shall be subject to the following: II.B.1.a The owner/operator shall not produce more than 140,000 tons of processed aggregate material per rolling 12-month period. Processed is defined as passing through a crushing or screening unit prior to product usage or delivery. [R307-401-8]
DAQE-AN143290002-24
Page 6

II.B.1.a.1 The owner/operator shall: A. Determine production by production scales, scale house records, vendor receipts, and/or any appropriate mechanism. B. Weigh and account for all aggregate material prior to the aggregate material leaving the site or being used in another process on site. C. Record production on a daily basis while the plant is in operation. D. Use the production data to calculate a new rolling 12-month total by the 20th day of each month using data from the previous 12 months. E. Keep records of production for all periods the plant is in operation. [R307-401-8]
II.B.1.b Unless otherwise specified in this AO, the owner/operator shall not allow visible emissions from any fugitive dust source to exceed 20 percent opacity. [R307-204-5]

II.B.1.c Unless otherwise specified in this AO, opacity observations of emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. [R307-401]
II.B.2 All crushers shall be subject to the following:
II.B.2.a The owner/operator shall not allow visible emissions from any crusher on site subject to NSPS Subpart OOO to exceed 15 percent opacity, and any crusher on site manufactured on or after April 22, 2008, to exceed 12 percent opacity. [40 CFR 60 Subpart OOO]
II.B.2.b The owner/operator shall install water sprays on all crushers on site to control fugitive emissions. Sprays shall operate as required to ensure the opacity limits listed in this AO are not exceeded
when the temperature is above freezing. [R307-401-8]

II.B.3 All screens shall be subject to the following: II.B.3.a The owner/operator shall not allow visible emissions from any screen on site subject to NSPS
Subpart OOO to exceed 10 percent opacity and any screen on site manufactured on or after April
22, 2008, to exceed 7 percent opacity. [40 CFR 60 Subpart OOO]
II.B.3.b The owner/operator shall install water sprays on all screens on site to control fugitive emissions. Sprays shall operate as required to ensure the opacity limits listed in this AO are not exceeded when the temperature is above freezing. [R307-401-8]
II.B.4 All conveyors shall be subject to the following:
II.B.4.a The owner/operator shall not allow visible emissions from any conveyor transfer point subject to NSPS Subpart OOO on site to exceed 10 percent opacity and any conveyor transfer point on site manufactured on or after April 22, 2008, to exceed 7 percent opacity. [40 CFR 60 Subpart OOO]
II.B.4.b The owner/operator shall install water sprays on all unenclosed conveyor transfer points on site
to control fugitive emissions. Sprays shall operate as required to ensure the opacity limits listed
in this AO are not exceeded. [R307-401-8]

II.B.5 All crushers, screens, and conveyors on site subject to NSPS subpart OOO shall be subject to the following:
II.B.5.a The owner/operator shall conduct an initial performance test for all crushers, screens, and
conveyor transfer points on site that are subject to NSPS OOO. Performance tests shall meet the
limitations specified in Table 3 to Subpart OOO. [40 CFR 60 Subpart OOO]

DAQE-AN143290002-24
Page 7

II.B.5.a.1 Initial performance tests for fugitive emissions limits shall be conducted according to 40 CFR 60.675(c). The owner or operator may use methods and procedures specified in 40 CFR 60.675(e) as alternatives to the reference methods and procedures specified in 40 CFR 60.675(c). [40 CFR 60 Subpart OOO]
II.B.5.b The owner/operator shall perform monthly periodic inspections to check that water is flowing to discharge spray nozzles associated with each crusher, screen, and conveyor transfer point manufactured on or after April 22, 2008. If the owner/operator finds that water is not flowing
properly during an inspection of the water spray nozzles, the owner/operator shall initiate corrective action within 24 hours and complete corrective action as expediently as practical. [40 CFR 60 Subpart OOO]

II.B.5.b.1 The owner/operator shall keep records of the water spray inspections and maintain the records in a logbook for all periods when the plant is in operation. The records of water spray inspections shall include the following items: A. Date the inspections were made. B. Any corrective actions taken. C. Control mechanism used if sprays are not operating. [40 CFR 60 Subpart OOO]
II.B.6 Haul roads and all fugitive dust sources associated with the equipment listed in this AO shall be subject to the following:
II.B.6.a The owner/operator shall not exceed an unpaved haul road length of 2,500 feet. [R307-401-8]
II.B.6.a.1 The owner/operator shall:
A. Measure the haul road length from the site entrance to the furthest point haul trucks
travel inside the pit.
B. Determine the length of the haul road by the owner/operator's own method.
C. Keep and maintain records of haul road length on site.

[R307-401-8]
II.B.6.b The owner/operator shall not allow visible emissions from haul roads and fugitive dust sources to exceed 20 percent opacity at all times. [R307-205-4] II.B.6.c The owner/operator shall use water application and/or chemical treatment on all unpaved haul
roads. Water application shall be used on all wheeled-vehicle operational areas and all exposed
areas on site to maintain opacity limits listed in this AO. The owner/operator may stop applying
water if the temperature is below freezing. The owner/operator shall resume applying water when
the temperature is above freezing. [R307-401-8]

II.B.6.d The owner/operator shall use water application on all haul roads, all wheeled-vehicle operational areas, and all exposed areas on site to maintain opacity limits listed in this AO. The owner/operator may stop applying water if the temperature is below freezing. The owner/operator shall resume applying water when the temperature is above freezing. [R307-401-8]
DAQE-AN143290002-24
Page 8

II.B.6.e The owner/operator shall install water sprays on all conveyor drop points on site. The owner/operator shall apply water from conveyor sprays and water trucks to all storage piles on site to control fugitive emissions. Sprays shall operate as required to ensure the opacity limits listed in this AO are not exceeded. [R307-401-8]
II.B.6.f The owner/operator shall comply with all applicable requirements of R307-205 for Fugitive Emission and Fugitive Dust sources on site. [R307-205]
II.B.7 The 410 kW generator shall be subject to the following:
II.B.7.a The owner/operator shall not operate the 410 kW generator for more than 1,000 hours per rolling 12-month period. [R307-401-8]
II.B.7.b The owner/operator shall: A. Determine hours of operation by supervisor monitoring and maintaining of an operations log. B. Keep records of operation for all periods when the plant is in operation. C. Use the records of operation to calculate a new 12-month total by the 20th day of each month using data from the previous 12 months. [R307-401-8]
II.B.7.c The owner/operator shall not allow visible emissions from the 410 kW Generator to exceed
20 percent opacity. [R307-401-8]
II.B.7.d The owner/operator shall only combust diesel fuel that meets the definition of ultra-low sulfur diesel (ULSD), which has a sulfur content of 15 ppm or less, in all on site equipment. [R307-401-8]
II.B.7.e To demonstrate compliance with the ULSD fuel requirement, the owner/operator shall determine
the sulfur content by ASTM Method D2889-71, D4294-89, or approved equivalent. Certification of diesel fuel shall be either by the owner/operator's own testing or by test reports from the diesel
fuel marketer. [R307-203]

PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents:
Supersedes AO DAQE-AN0143290001-11 dated June 23, 2011
DAQE-AN143290002-24
Page 9

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-
RN143290002 August 20, 2024 Wes Christensen Christensen Brothers Rock Products PO Box 191 Fairview, UT 84629 [e-mail] Dear Wes Christensen, Re: Engineer Review: Administrative Amendment to Approval Order DAQE-AN0143290001-11 for a 10-Year Review and Permit Updates Project Number: N143290002 The DAQ requests a company representative review and sign the attached Engineer Review (ER). This ER identifies all applicable elements of the New Source Review (NSR) permitting program. Christensen Brothers Rock Products should complete this review within 10 business days of receipt. Christensen Brothers Rock Products should contact Katie Andersen at [phone] if there are questions or concerns with the review of the draft permit conditions. Upon resolution of your concerns, please email Katie Andersen at [e-mail] the signed cover letter. Upon receipt of the signed cover letter, the DAQ will prepare an Approval Order (AO) for signature by the DAQ Director. If Christensen Brothers Rock Products does not respond to this letter within 10 business days, the project will move forward without source concurrence. If Christensen Brothers Rock Products has concerns that cannot be resolved and the project becomes stagnant, the DAQ Director may issue an Order prohibiting construction. Approval Signature _____________________________________________________________ (Signature & Date)
195 North 1950 West • Salt Lake City, UT
Mailing Address: P.O. Box 144820 • Salt Lake City, UT 84114-4820
Telephone [phone] • Fax [phone] • T.D.D. [phone] www.deq.utah.gov Printed on 100% recycled paper
Department of Environmental Quality
Kimberly D. Shelley Executive Director DIVISION OF AIR QUALITY Bryce C. Bird Director
State of Utah
SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor

Engineer Review N143290002: Christensen Brothers Rock Products- Rock Plant August 20, 2024 Page 1
UTAH DIVISION OF AIR QUALITY ENGINEER REVIEW
SOURCE INFORMATION Project Number N143290002 Owner Name Christensen Brothers Rock Products Mailing Address PO Box 191 Fairview, UT, 84629 Source Name Christensen Brothers Rock Products- Rock Plant Source Location 11350 East Gravel Pit Road Fairview, UT 84629 UTM Projection 463,014 m Easting, 4,381,166 m Northing UTM Datum NAD83 UTM Zone UTM Zone 12 SIC Code 1442 (Construction Sand & Gravel) Source Contact Wes Christensen Phone Number [phone] Email [e-mail] Billing Contact Wes Christensen Phone Number [phone] Email [e-mail] Project Engineer Katie Andersen, Engineer Phone Number [phone] Email [e-mail] Notice of Intent (NOI) Submitted May 30, 2024 Date of Accepted Application July 5, 2024

Engineer Review N143290002: Christensen Brothers Rock Products- Rock Plant August 20, 2024 Page 2
SOURCE DESCRIPTION General Description Christensen Rock Products is an aggregate processing plant located at 11350 E. Gravel Pit Road, Fairview, Utah, which is located in Sanpete County. The plant consists of two crushers, two screens, a diesel generator, miscellaneous conveyors, stackers, and mobile equipment. The source processes up to 140,000 tons of aggregate per year. NSR Classification: 10 Year Review Source Classification Located in Attainment Area Sanpete County Airs Source Size: B Applicable Federal Standards NSPS (Part 60), A: General Provisions NSPS (Part 60), OOO: Standards of Performance for Nonmetallic Mineral Processing Plants NSPS (Part 60), IIII: Standards of Performance for Stationary Compression 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 Title V (Part 70) Area Source Project Proposal Administrative Amendment to Approval Order DAQE-AN0143290001-11 for a 10-Year Review and Permit Updates Project Description This is a 10-Year Review to update the language, formatting, and layout of the permit to match current DAQ permitting standards. EMISSION IMPACT ANALYSIS This is a 10-Year Review to update the language, format, and layout of the permit. No changes to equipment or emissions are being made at this time. Therefore, modeling is not required. [Last updated June 26, 2024]

Engineer Review N143290002: Christensen Brothers Rock Products- Rock Plant August 20, 2024 Page 3
SUMMARY OF EMISSIONS The emissions listed below are an estimate of the total potential emissions from the source. Some rounding of emissions is possible. Criteria Pollutant Change (TPY) Total (TPY)
CO2 Equivalent 0 316.00
Carbon Monoxide 0 1.83 Nitrogen Oxides 0 8.49 Particulate Matter - PM10 0 4.48 Particulate Matter - PM2.5 0 1.01
Sulfur Dioxide 0 0.56 Volatile Organic Compounds 0 0.74 Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Acetaldehyde (CAS #75070) 0 3
Benzene (Including Benzene From Gasoline) (CAS #71432) 0 2 Formaldehyde (CAS #50000) 0 5 Generic HAPs (CAS #GHAPS) 0 8 Toluene (CAS #108883) 0 1
Xylenes (Isomers And Mixture) (CAS #1330207) 0 1
Change (TPY) Total (TPY) Total HAPs 0 0.01 Note: Change in emissions indicates the difference between previous AO and proposed modification.
Commented [KA1]: Manually enter zero

Engineer Review N143290002: Christensen Brothers Rock Products- Rock Plant August 20, 2024 Page 4
Review of BACT for New/Modified Emission Units 1. BACT review regarding 10-Year Review This is a 10-Year Review to update the format, language, and layout of the permit to match current DAQ standards. There are no changes to the equipment or emissions. Therefore, a BACT analysis is not required at this time. [Last updated July 5, 2024]
SECTION I: GENERAL PROVISIONS
The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label): I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to those rules. [R307-101] I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401] I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions covered by this AO must be reviewed and approved. [R307-401-1]
I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by the owner/operator, shall be made available to the Director or Director's representative upon request, and the records shall include the two-year period prior to the date of the request. Unless otherwise specified in this AO or in other applicable state and federal rules, records shall be kept for a minimum of two (2) years. [R307-401-8] I.5 At all times, including periods of startup, shutdown, and malfunction, owners and operators shall, to the extent practicable, maintain and operate any equipment approved under this AO, including associated air pollution control equipment, in a manner consistent with good air pollution control practice for minimizing emissions. Determination of whether acceptable operating and maintenance procedures are being used will be based on information available to the Director which may include, but is not limited to, monitoring results, opacity observations, review of operating and maintenance procedures, and inspection of the source. All maintenance performed on equipment authorized by this AO shall be recorded. [R307-401-4]
I.6 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns. [R307-107]
I.7 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-150]

Engineer Review N143290002: Christensen Brothers Rock Products- Rock Plant August 20, 2024 Page 5
SECTION II: PERMITTED EQUIPMENT The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label): II.A THE APPROVED EQUIPMENT II.A.1 Fairview Aggregate Pit II.A.2 Jaw Crusher Maximum rated capacity: 500 tons per hour (tph)
II.A.3 Cone Crusher Maximum rated capacity: 500 tph
II.A.4 Two (2) Screens Maximum rated capacity: 500 tph each II.A.5 Various Conveyors, Stackers and Feeders II.A.6 Diesel Generator Maximum rated capacity: 410 kW (245 hp) Manufacture date: 2007 II.A.7 Off-road Mobile Equipment* Miscellaneous front-end loader(s), bulldozer(s), water truck(s), etc. * Note: The equipment is listed for informational purposes only.
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 REQUIREMENTS AND LIMITATIONS II.B.1 The Fairview pit shall be subject to the following: II.B.1.a NEW The owner/operator shall not produce more than 140,000 tons of processed aggregate material per rolling 12-month period. Processed is defined as passing through a crushing or screening unit prior to product usage or delivery. [R307-401-8]

Engineer Review N143290002: Christensen Brothers Rock Products- Rock Plant August 20, 2024 Page 6
II.B.1.a.1 NEW The owner/operator shall: A. Determine production by production scales, scale house records, vendor receipts,
and/or any appropriate mechanism B. Weigh and account for all aggregate material prior to the aggregate material leaving the site or being used in another process on site
C. Record production on a daily basis while the plant is in operation D. Use the production data to calculate a new rolling 12-month total by the 20th day of
each month using data from the previous 12 months E. Keep records of production for all periods the plant is in operation. [R307-401-8]
II.B.1.b Unless otherwise specified in this AO, the owner/operator shall not allow visible emissions from any fugitive dust source to exceed 20 percent opacity. [R307-204-5]
II.B.1.c Unless otherwise specified in this AO, opacity observations of emissions from stationary sources shall be conducted according to 40 CFR 60, Appendix A, Method 9. [R307-401] II.B.2 All crushers shall be subject to the following:
II.B.2.a The owner/operator shall not allow visible emissions from any crusher on site subject to NSPS Subpart OOO to exceed 15 percent opacity, and any crusher on site manufactured on or after April 22, 2008 to exceed 12 percent opacity. [40 CFR 60 Subpart OOO] II.B.2.b The owner/operator shall install water sprays on all crushers on site to control fugitive emissions. Sprays shall operate as required to ensure the opacity limits listed in this AO are not exceeded when the temperature is above freezing. [R307-401-8] II.B.3 All screens shall be subject to the following: II.B.3.a The owner/operator shall not allow visible emissions from any screen on site subject to NSPS Subpart OOO to exceed 10 percent opacity, and any screen on site manufactured on or after April 22, 2008 to exceed 7 percent opacity. [40 CFR 60 Subpart OOO] II.B.3.b The owner/operator shall install water sprays on all screens on site to control fugitive emissions. Sprays shall operate as required to ensure the opacity limits listed in this AO are not exceeded when the temperature is above freezing. [R307-401-8]
II.B.4 All conveyors shall be subject to the following:
II.B.4.a The owner/operator shall not allow visible emissions from any conveyor transfer point subject to NSPS Subpart OOO on site to exceed 10 percent opacity, and any conveyor transfer point on site manufactured on or after April 22, 2008 to exceed 7 percent opacity. [40 CFR 60 Subpart OOO] II.B.4.b The owner/operator shall install water sprays on all unenclosed conveyor transfer points on site to control fugitive emissions. Sprays shall operate as required to ensure the opacity limits listed in this AO are not exceeded. [R307-401-8] II.B.5 All crushers, screens, and conveyors on site subject to NSPS subpart OOO shall be subject to the following:

Engineer Review N143290002: Christensen Brothers Rock Products- Rock Plant August 20, 2024 Page 7
II.B.5.a The owner/operator shall conduct an initial performance test for all crushers, screens, and conveyor transfer points on site that are subject to NSPS OOO. Performance tests shall meet the limitations specified in Table 3 to Subpart OOO. [40 CFR 60 Subpart OOO] II.B.5.a.1 NEW Initial performance tests for fugitive emissions limits shall be conducted according to 40 CFR 60.675(c). The owner or operator may use methods and procedures specified in 40 CFR 60.675(e) as alternatives to the reference methods and procedures specified in 40 CFR 60.675(c). [40 CFR 60 Subpart OOO]
II.B.5.b The owner/operator shall perform monthly periodic inspections to check that water is flowing to discharge spray nozzles associated with each crusher, screen, and conveyor transfer point manufactured on or after April 22, 2008. If the owner/operator finds that water is not flowing properly during an inspection of the water spray nozzles, the owner/operator shall initiate corrective action within 24 hours and complete corrective action as expediently as practical. [40 CFR 60 Subpart OOO]
II.B.5.b.1 NEW The owner/operator shall keep records of the water sprays inspections and maintain the records in a logbook for all periods when the plant is in operation. The records of water spray inspections shall include the following items: A. Date the inspections were made B. Any corrective actions taken C. Control mechanism used if sprays are not operating. [40 CFR 60 Subpart OOO]
II.B.6 Haul roads and all fugitive dust sources associated with the equipment listed in this AO shall be subject to the following:
II.B.6.a NEW The owner/operator shall not exceed an unpaved haul road length of 2,500 feet. [R307-401-8]
II.B.6.a.1 NEW The owner/operator shall: A. Measure the haul road length from the site entrance to the furthest point haul trucks
travel inside the pit B. Determine the length of the haul road by the owner/operator's own method C. Keep and maintain records of haul road length on site. [R307-401-8] II.B.6.b The owner/operator shall not allow visible emissions from haul roads and fugitive dust sources to exceed 20 percent opacity at all times. [R307-205-4]
II.B.6.c The owner/operator shall use water application and/or chemical treatment on all unpaved haul roads. Water application shall be used on all wheeled-vehicle operational areas, and all exposed areas on site to maintain opacity limits listed in this AO. The owner/operator may stop applying water if the temperature is below freezing. The owner/operator shall resume applying water when the temperature is above freezing. [R307-401-8]

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II.B.6.d The owner/operator shall use water application on all haul roads, all wheeled-vehicle operational areas, and all exposed areas on site to maintain opacity limits listed in this AO. The owner/operator may stop applying water if the temperature is below freezing. The owner/operator shall resume applying water when the temperature is above freezing. [R307-401-8]
II.B.6.e The owner/operator shall install water sprays on all conveyor drop points on site. The owner/operator shall apply water from conveyor sprays and water trucks to all storage piles on site to control fugitive emissions. Sprays shall operate as required to ensure the opacity limits listed in this AO are not exceeded. [R307-401-8] II.B.6.f The owner/operator shall comply with all applicable requirements of R307-205 for Fugitive Emission and Fugitive Dust sources on site. [R307-205] II.B.7 The 410 kW generator shall be subject to the following: II.B.7.a NEW The owner/operator shall not operate the 410 kW generator for more than 1,000 hours per rolling 12-month period. [R307-401-8] II.B.7.b NEW The owner/operator shall: A. Determine hours of operation by supervisor monitoring and maintaining of an
operations log B. Keep records of operation for all periods when the plant is in operation C. Use the records of operation to calculate a new 12-month total by the 20th day
of each month using data from the previous 12 months. [R307-401-8] II.B.7.c NEW The owner/operator shall not allow visible emissions from the 410 kW Generator to exceed 20 percent opacity. [R307-401-8] II.B.7.d NEW The owner/operator shall only combust diesel fuel that meets the definition of ultra-low sulfur diesel (ULSD), which has a sulfur content of 15 ppm or less, in all on site equipment. [R307-401-8]
II.B.7.e NEW To demonstrate compliance with the ULSD fuel requirement, the owner/operator shall determine the sulfur content by ASTM Method D2889-71, D4294-89, or approved equivalent. Certification of diesel fuel shall be either by the owner/operator's own testing or by test reports from the diesel fuel marketer. [R307-203]

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PERMIT HISTORY When issued, the approval order shall supersede (if a modification) or will be based on the following documents: Supersedes DAQE-AN0143290001-11 dated May 11, 2011
REVIEWER COMMENTS 1. Comment regarding 10-Year Review: This is a 10-Year Review. The equipment list has not changed. Equipment List Item II.A.3 was updated with additional information. The horsepower of the diesel generator was added. A previous Compliance Inspection noted that "the generator conversion amounts to 305 hp which is then downgraded 20% to 245 hp to account for operational elevation conditions per manufacturer's guidance". Emissions have not changed, except for the addition of CO2e emissions estimate. CO2e emissions were estimated from the permitted combustion sources on site. When the source goes through the next modification, CO2e emissions should be verified. [Last updated August 2, 2024] 2. Comment regarding Federal Rule Applicability: NSPS Subpart IIII: The Christensen Brothers Rock Products Aggregate Pit is subject to 40 CFR 60 NSPS Subpart IIII (Standards of performance for Stationary Compression Ignition Internal Combustion Engines). The provisions of NSPS Subpart IIII are applicable to owners/operators that commence construction of stationary CI ICE after July 11, 2005.
NSPS Subpart OOO: The Christensen Brothers Rock Products Aggregate Pit is subject to 40 CFR 60 Subpart OOO (Standards of performance for Nonmetallic Mineral Processing Plants). The provisions of NSPS Subpart OOO are applicable to various screens, crushers, and conveyors. MACT Subpart ZZZZ: The Christensen Brothers Rock Products Aggregate Pit is subject to 40 CFR 63 Subpart ZZZZ (National Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines). The provisions of MACT Subpart ZZZZ are applicable to owners/operators of stationary RICE at major or area sources of HAP emissions. [Last updated August 13, 2024] 3. Comment regarding Title V Applicability: Title V of the 1990 Clean Air Act (Title V) applies to the following: 1. Any major source 2. Any source subject to a standard, limitation, or other requirement under Section 111 of the Act, Standards of Performance for New Stationary Sources; 3. Any source subject to a standard or other requirement under Section 112 of the Act, Hazardous Air Pollutants. 4. Any Title IV affected source. This facility is not a major source and is not a Title IV source. The facility is subject to 40 CFR 60 (NSPS). This facility is not subject to 40 CFR 61 (NESHAP) regulations. The facility is subject to 40 CFR 60 Subpart A (General Requirements), Subpart OOO (Standards of Performance for

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Nonmetallic Mineral Processing Plants), Subpart IIII (Standards of Performance for Stationary Compression Ignition Internal Combustion Engines), 40 CFR 63 Subpart A (General Requirements), and 40 CFR 63 Subpart ZZZZ (National Emissions Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines). 40 CFR 60 Subpart OOO does not exempt a source from the obligation to obtain a permit under 40 CFR part 70 (Title V Permit). Therefore, this facility is a Title V area source. [Last updated August 13, 2024]

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