DAQ-2025-002350

DAQE-AN129340009-25

{{$d1 }}

Stephanie Gledhill
Quality Excavation Inc.
1472 East 3950 South
St. George, UT 84790
[e-mail]

Dear Ms. Gledhill:

Re: Approval Order: Administrative Amendment to Approval Order DAQE-AN129340008-23 to
Update Equipment Name
Project Number: N129340009

The attached Approval Order (AO) is issued pursuant to the Division of Air Quality conducting an
administrative review of this source and its respective AO. Quality Excavation Inc. 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: Southwest Utah Public 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

Tim Davis
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

May 5, 2025

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

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APPROVAL ORDER
DAQE-AN129340009-25
Administrative Amendment to Approval Order
DAQE-AN129340008-23 to Update
Equipment Name

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

Issued to
Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality

May 5, 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 .................................................................................... 4
SECTION II: PERMITTED EQUIPMENT .............................................................................. 5
SECTION II: SPECIAL PROVISIONS ..................................................................................... 6
PERMIT HISTORY ................................................................................................................... 10
ACRONYMS ............................................................................................................................... 11

DAQE-AN129340009-25
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Quality Excavation Inc. Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park

Mailing Address Physical Address
1472 East 3950 South
St. George, UT 84790
Approximately 1.4 miles southeast of the Street
George Airport
St. George, UT 84790

Source Contact UTM Coordinates
Name: Stephanie Gledhill 278,274 m Easting
Phone: [phone],099,314 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12
SIC code 1442 (Construction Sand & Gravel)

SOURCE INFORMATION
General Description
Quality Excavation Inc. (QE) operates an aggregate processing plant, the Desert Canyon Pit, in the Fort
Pierce area of St. George, Washington County. QE uses crushers, screens, conveyor transfers, storage
piles, loaders, and generator engines to process aggregate material. QE produces up to 550,000 tons of
aggregate per year.

NSR Classification
Administrative Amendment

Source Classification
Located in Attainment Area
Washington 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
DAQE-AN129340009-25
Page 4

MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
Title V (Part 70) Area Source

Project Description
This is an administrative amendment to update the name of Equipment ID II.A.4, "Trackhoe Crusher," to
more accurately describe the equipment on site.

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 2527.00
Carbon Monoxide 0 31.70
Nitrogen Oxides 0 9.80
Particulate Matter - PM10 0 10.25
Particulate Matter - PM2.5 0 1.80
Sulfur Dioxide 0 0.60
Volatile Organic Compounds 0 2.90

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Generic HAPs (CAS #GHAPS) 0 120
Change (TPY) Total (TPY)
Total HAPs 0 0.06

SECTION I: GENERAL PROVISIONS

I.1 All definitions, terms, abbreviations, and references used in this AO conform to those used in the UAC R307 and 40 CFR. Unless noted otherwise, references cited in these AO conditions refer to those rules. [R307-101]
I.2 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401] I.3 Modifications to the equipment or processes approved by this AO that could affect the emissions covered by this AO must be reviewed and approved. [R307-401-1]
I.4 All records referenced in this AO or in other applicable rules, which are required to be kept by the owner/operator, shall be made available to the Director or Director's representative upon request, and the records shall include the two-year period prior to the date of the request. Unless otherwise specified in this AO or in other applicable state and federal rules, records shall be kept for a minimum of two (2) years. [R307-401-8]
DAQE-AN129340009-25
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 Desert Canyon Pit Aggregate processing operations
II.A.2 Jaw Crusher One (1) jaw crusher Capacity: 350 tons per hour Manufactured in 2006 NSPS Subpart OOO II.A.3 Cone Crusher One (1) cone crusher Capacity: 400 tons per hour Manufactured in 2017 NSPS Subpart OOO
II.A.4 Jaw Crusher One (1) jaw crusher Capacity: 400 tons per hour Manufactured in 2017 NSPS Subpart OOO II.A.5 Screen One (1) screen Capacity: 551 tons per hour Manufactured in 2017 NSPS Subpart OOO equipment
II.A.6 Conveyors and Stackers NSPS Subpart OOO
DAQE-AN129340009-25
Page 6

II.A.7 Generator Engine One (1) generator engine Rating: 261 kW (350 hp) Fuel: diesel fuel Manufactured: 2016 NSPS Subpart IIII MACT Subpart ZZZZ
II.A.8 Generator Engine One (1) generator engine Rating: 275 kW (369 hp)
Fuel: diesel fuel Manufactured: April 30, 2006 MACT Subpart ZZZZ

II.A.9 Generator Engine One (1) generator engine Rating: 87 kW (117 hp) Fuel: diesel fuel Manufactured in 2000 MACT Subpart ZZZZ II.A.10 Generator Engine
One (1) generator engine
Rating 83 kW (111 hp) Fuel: diesel fuel
Manufactured: 2017
NSPS Subpart IIII MACT Subpart ZZZZ

II.A.11 Drilling/Blasting Activity Control equipment: shroud attached to the drilling apparatus
II.A.12 Mobile Equipment - for information only
Miscellaneous off-highway mobile equipment, including loaders, dozers, and aggregate-moving equipment.

SECTION II: SPECIAL PROVISIONS
II.B REQUIREMENTS AND LIMITATIONS
II.B.1 Site-Wide Requirements and Limitations
II.B.1.a Unless otherwise specified in this AO, the owner/operator shall not allow visible emissions from any emission unit on site to exceed 20 percent opacity. [R307-401-8]
II.B.1.a.1 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. [R307-401-8]
II.B.2 Aggregate Production Plants:
II.B.2.a The owner/operator shall not produce more than 550,000 tons of processed aggregate material per rolling 12-month period. [R307-401-8]
DAQE-AN129340009-25
Page 7

II.B.2.a.1 The owner/operator shall: A. Determine production using sales receipts or a belt scale. B. Record production on a daily basis. C. 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. D. Keep the production records for all periods the plant is in operation. [R307-401-8] II.B.2.b The owner/operator shall not allow visible emissions from the following crushers on site to
exceed the following values:
A. Installed before April 22, 2008 – 15 percent opacity.
B. Installed on or after April 22, 2008 – 12 percent opacity.

[40 CFR 60 Subpart OOO, R307-401-8]
II.B.2.c The owner/operator shall not allow visible emissions from the screens on site to exceed 7 percent opacity. [40 CFR 60 Subpart OOO, R307-401-8] II.B.2.d The owner/operator shall not allow visible emissions from any conveyor transfer point on site to
exceed 10 percent opacity. [40 CFR 60 Subpart OOO, R307-401-8]

II.B.2.e The owner/operator shall not allow visible emissions from any conveyor drop point on site to exceed 20 percent opacity. [40 CFR 60 Subpart OOO, R307-401-8]
II.B.2.f The owner/operator shall install water spray at the following points to control fugitive emissions:
A. All crushers.
B. All screens.

C. All conveyor transfer points.
[R307-401-8]

II.B.2.g 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. 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, R307-401-8]
II.B.2.g.1 Records of the water sprays inspections shall be kept and maintained in a logbook for all periods
when the plant is in operation. The records 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]

DAQE-AN129340009-25
Page 8

II.B.3 Crushers, Screens, and Conveyor subject to NSPS Subpart OOO: II.B.3.a The owner/operator shall conduct an initial performance test for all crushers, screens, and
conveyor transfer points on site within 60 days after achieving the maximum production rate but not later than 180 days after initial startup. Performance tests shall meet the limitations specified in Table 3 to Subpart OOO. [40 CFR 60 Subpart OOO]

II.B.3.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.3.a.2 The owner/operator shall keep and maintain records of the initial performance test for each
crusher, screen, and conveyor for the life of the equipment. [R307-401-8]
II.B.4 Drilling and Blasting Requirements
II.B.4.a The owner/operator shall not blast more than 49 tons of ANFO per rolling 12-month period.
[R307-401-8]
II.B.4.a.1 The owner/operator shall: A. Determine the amount of ANFO used in blasting with purchasing records or maintaining an operations log. B. Record the amount of ANFO used in blasting on a daily basis. C. Use the blasting data to calculate a new rolling 12-month total by the 20th day of each month from the previous 12 months. D. Keep the production records for all periods the plant is in operation. [R307-401-8]
II.B.4.b The owner/operator shall use shroud operation on all aggregate drilling equipment when drilling to control fugitive emissions. [R307-401-8]

II.B.5 Haul Roads and Fugitive Dust Sources
II.B.5.a The owner/operator shall not allow visible emissions from haul roads and fugitive dust sources to exceed 20 percent opacity on site. [R307-205-4, R307-401-8]

II.B.5.a.1 Visible emission determinations for fugitive dust from haul roads and operational areas shall use procedures similar to Method 9. The normal requirement for observations to be made at 15-second intervals over a six-minute period, however, shall not apply. Visible emissions shall be measured at the densest point of the plume but at a point not less than one-half vehicle length behind the vehicle and not less than one-half the height of the vehicle. [R307-205-4, R307-401-8]
II.B.5.b The haul roads shall not exceed the following lengths:

A. Unpaved haul roads not to exceed 2,734 feet.

B. Loader operating area not to exceed 264 feet.

C. Trackhoe haul roads not to exceed 33 feet.

[R307-401-8]

DAQE-AN129340009-25
Page 9

II.B.5.b.1 Compliance shall be determined through Global Positioning System (GPS) measurements or aerial photographs. [R307-401-8] II.B.5.c The owner/operator shall cover the unpaved haul roads on with road base. [R307-401-8]
II.B.5.d The owner/operator shall not have the total area of storage piles exceeding three (3) acres. [R307-401-8] II.B.5.d.1 Compliance shall be determined through GPS measurements or aerial photographs.
[R307-401-8]
II.B.5.e The owner/operator shall apply water to fugitive dust sources to prevent visible emissions from exceeding the opacity limits listed in this AO. The owner/operator may stop applying water to fugitive dust sources when the temperature is below freezing but shall apply other controls as necessary to prevent visible emissions from exceeding the opacity limits listed in this AO. [R307-205-4, R307-401-8] II.B.5.e.1 The owner/operator shall keep records of water application and fugitive dust control for all
periods when the plant is in operation. The records shall include the following items:
A. Date and time treatments were made.

B. Number of treatments made and quantity of water applied.
C. Rainfall amount received, if any.
D. Records of temperature, if the temperature is below freezing.

E. Records of any other controls used to reduce fugitive dust.
[R307-205-4, R307-401-8]

II.B.6 Generator Engines: II.B.6.a The owner/operator shall install the generator engines that are certified to meet the following
emission rates:
A. 261 kW generator engine
NOx - 0.29 g/hp-hr or less
CO - 2.61 g/hp-hr or less
B. 275 kW generator engine
NOx - 3.59 g/hp-hr or less CO - 0.23 g/hp-hr or less

C. 87 kW generator engine
NOx - 6.86 g/hp-hr or less

D. 83 kW generator engine
NOx - 0.29 g/hp-hr or less
CO - 2.61g/hp-hr or less

[R307-401-8]

II.B.6.a.1 To demonstrate compliance with the emission rate, the owner/operator shall keep a record of the manufacturer's certification of the emission rate. The record shall be kept for the life of the equipment. [R307-401-8]
DAQE-AN129340009-25
Page 10

II.B.6.b The owner/operator shall not allow visible emissions from the generator engines to exceed 20 percent opacity on site. [R307-401-8] II.B.6.c The owner/operator shall not operate:
A. The 261 kW generator engines for more than 4,380 hours per rolling 12-month period. B. The 275 kW generator engines for more than 2,340 hours per rolling 12-month period.
C. The 87 kW generator engine for more than 100 hours per rolling 12-month period.
D. The 83 kW generator engines for more than 4,380 hours per rolling 12-month period. [40 CFR 60 Subpart IIII, 40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.6.c.1 The owner/operator shall: A. Determine hours of operation with a non-resettable hour meter for each engine. B. Record hours of operation each day. C. Use the hours of operation to calculate a new rolling 12-month total by the 20th day of each month using data from the previous 12 months. D. Keep hours of operation records for all periods the plant is in operation. [40 CFR 60 Subpart IIII, 40 CFR 63 Subpart ZZZZ, R307-401-8] II.B.6.d The owner/operator shall only use diesel fuel (e.g., fuel oil #1, #2, or diesel fuel oil additives) as
fuel in each engine. [R307-401-8]

II.B.6.d.1 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. [R307-401-8]
II.B.6.d.2 To demonstrate compliance with the ULSD fuel requirement, the owner/operator shall maintain records of diesel fuel purchase invoices or obtain certification of sulfur content from the diesel
fuel supplier. The diesel fuel purchase invoices shall indicate that the diesel fuel meets the ULSD
requirements. [R307-401-8]

PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents:
Supersedes AO DAQE-AN129340008-23 dated September 25, 2023 Is Derived From Update Request dated January 14, 2025
DAQE-AN129340009-25
Page 11

ACRONYMS

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

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

DAQE-

RN129340009 April 7, 2025 Stephanie Gledhill
Quality Excavation Inc. 1472 East 3950 South St. George, UT 84790
[e-mail] Dear Stephanie Gledhill,
Re: Engineer Review: Administrative Amendment to Approval Order DAQE-AN129340008-23 to Update Equipment Name Project Number: N129340009 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. Quality Excavation Inc. should complete this review within 10 business days of receipt. Quality Excavation Inc. 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 Quality Excavation Inc. does not respond to this letter within 10 business days, the project will move forward without source concurrence. If Quality Excavation Inc. 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
Tim Davis Interim Executive Director DIVISION OF AIR QUALITY Bryce C. Bird Director
State of Utah
SPENCER J. COX Governor DEIDRE HENDERSON Lieutenant Governor

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 1
UTAH DIVISION OF AIR QUALITY
ENGINEER REVIEW

SOURCE INFORMATION
Project Number N129340009 Owner Name Quality Excavation Inc. Mailing Address 1472 East 3950 South
St. George, UT, 84790 Source Name Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce
Industrial Park Source Location Approximately 1.4 miles southeast of the St. George Airport St. George, UT 84790
UTM Projection 278,274 m Easting, 4,099,314 m Northing UTM Datum NAD83 UTM Zone UTM Zone 12 SIC Code 1442 (Construction Sand & Gravel) Source Contact Stephanie Gledhill Phone Number [phone] Email [e-mail] Billing Contact Stephanie Gledhill
Phone Number [phone] Email [e-mail]
Project Engineer Katie Andersen, Engineer Phone Number [phone] Email [e-mail]
Notice of Intent (NOI) Submitted January 14, 2025 Date of Accepted Application February 21, 2025

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 2
SOURCE DESCRIPTION General Description
Quality Excavation Inc. (QE) operates an aggregate processing plant, the Desert Canyon Pit, in the Fort Pierce area of St. George, Washington County. QE uses crushers, screens, conveyor transfers, storage piles, loaders, and generator engines to process aggregate material. QE produces
up to 550,000 tons of aggregate per year. NSR Classification: 10 Year Review Source Classification Located in Attainment Area Washington 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-AN129340008-23 to Update Equipment Name
Project Description This is an administrative amendment to update the name of Equipment ID II.A.4 "Trackhoe Crusher" to more accurately describe the equipment on site. EMISSION IMPACT ANALYSIS
This is an administrative amendment. There are no changes to equipment nor emissions at this time. Therefore, modeling is not required. [Last updated February 13, 2025]

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 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 2527.00 Carbon Monoxide 0 31.70
Nitrogen Oxides 0 9.80
Particulate Matter - PM10 0 10.25
Particulate Matter - PM2.5 0 1.80
Sulfur Dioxide 0 0.60
Volatile Organic Compounds 0 2.90 Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Generic HAPs (CAS #GHAPS) 0 120
Change (TPY) Total (TPY)
Total HAPs 0 0.06

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

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 4
Review of BACT for New/Modified Emission Units 1. BACT review regarding Administrative Amendment
This is an administrative amendment. There are no changes to the equipment nor emissions at this time. Therefore, a BACT analysis is not required. [Last updated February 13, 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): 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 N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 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 Desert Canyon Pit Aggregate processing operations II.A.2 Jaw Crusher One (1) jaw crusher Capacity: 350 tons per hour Manufactured in 2006 NSPS Subpart OOO
II.A.3 Cone Crusher One (1) cone crusher Capacity: 400 tons per hour Manufactured in 2017
NSPS Subpart OOO
II.A.4 Jaw Crusher
One (1) jaw crusher Capacity: 400 tons per hour Manufactured in 2017
NSPS Subpart OOO II.A.5 Screen One (1) screen
Capacity: 551 tons per hour Manufactured in 2017 NSPS Subpart OOO equipment II.A.6 Conveyors and Stackers NSPS Subpart OOO

II.A.7 Generator Engine One (1) generator engine Rating: 261 kW (350 hp)
Fuel: diesel fuel Manufactured: 2016 NSPS Subpart IIII
MACT Subpart ZZZZ

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 6
II.A.8 Generator Engine One (1) generator engine Rating: 275 kW (369 hp)
Fuel: diesel fuel Manufactured: April 30, 2006 MACT Subpart ZZZZ

II.A.9 Generator Engine One (1) generator engine Rating: 87 kW (117 hp) Fuel: diesel fuel Manufactured in 2000 MACT Subpart ZZZZ

II.A.10 Generator Engine One (1) generator engine Rating 83 kW (111 hp) Fuel: diesel fuel Manufactured: 2017 NSPS Subpart IIII
MACT Subpart ZZZZ
II.A.11 Drilling/Blasting Activity Control equipment: shroud attached to the drilling apparatus
II.A.12 Mobile Equipment - for information only
Miscellaneous off-highway mobile equipment including loaders, dozers and aggregate moving equipment.

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 Site-Wide Requirements and Limitations
II.B.1.a Unless otherwise specified in this AO, the owner/operator shall not allow visible emissions
from any emission unit on site to exceed 20 percent opacity. [R307-401-8] II.B.1.a.1 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. [R307-401-8]
II.B.2 Aggregate Production Plants:
II.B.2.a The owner/operator shall not produce more than 550,000 tons of processed aggregate material
per rolling 12-month period. [R307-401-8]

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 7
II.B.2.a.1 NEW The owner/operator shall:
A. Determine production using sales receipts or a belt scale.
B. Record production on a daily basis. C. 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.
D. Keep the production records for all periods the plant is in operation. [R307-401-8]

II.B.2.b The owner/operator shall not allow visible emissions from the following crushers on site to exceed the following values: A. Installed before April 22, 2008 - 15% opacity B. Installed on or after April 22, 2008 - 12% opacity. [40 CFR 60 Subpart OOO, R307-401-8]
II.B.2.c The owner/operator shall not allow visible emissions from the screens on site to exceed 7% opacity. [40 CFR 60 Subpart OOO, R307-401-8]
II.B.2.d The owner/operator shall not allow visible emissions from any conveyor transfer point on site to exceed 10 percent opacity. [40 CFR 60 Subpart OOO, R307-401-8]
II.B.2.e The owner/operator shall not allow visible emissions from any conveyor drop point on site to exceed 20 percent opacity. [40 CFR 60 Subpart OOO, R307-401-8] II.B.2.f The owner/operator shall install water sprays at the following points to control fugitive emissions: A. All crushers B. All screens C. All conveyor transfer points. [R307-401-8] II.B.2.g 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. 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, R307-401-8]

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 8
II.B.2.g.1 Records of the water sprays inspections shall be kept and maintained in a logbook for all periods when the plant is in operation. The records 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.3 Crushers, Screens, and Conveyor subject to NSPS Subpart OOO:
II.B.3.a The owner/operator shall conduct an initial performance test for all crushers, screens, and conveyor transfer points on site within 60 days after achieving the maximum production rate but not later than 180 days after initial startup. Performance tests shall meet the limitations specified in Table 3 to Subpart OOO. [40 CFR 60 Subpart OOO] II.B.3.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.3.a.2 The owner/operator shall keep and maintain records of the initial performance test for each crusher, screen, and conveyor for the life of the equipment. [R307-401-8]

II.B.4 Drilling and Blasting Requirements
II.B.4.a The owner/operator shall not blast more than 49 tons of ANFO per rolling 12-month period.
[R307-401-8] II.B.4.a.1 The owner/operator shall: A. Determine the amount of ANFO used in blasting with purchasing records or
maintaining an operations log. B. Record the amount of ANFO used in blasting on a daily basis. C. Use the blasting data to calculate a new rolling 12-month total by the 20th day of each
month from the previous 12 months.
D. Keep the production records for all periods the plant is in operation. [R307-401-8]
II.B.4.b The owner/operator shall use shroud operation on all aggregate drilling equipment when
drilling to control fugitive emissions. [R307-401-8] II.B.5 Haul Roads and Fugitive Dust Sources
II.B.5.a The owner/operator shall not allow visible emissions from haul roads and fugitive dust sources to exceed 20 percent opacity on site. [R307-205-4, R307-401-8]

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 9
II.B.5.a.1 Visible emission determinations for fugitive dust from haul roads and operational areas shall use procedures similar to Method 9. The normal requirement for observations to be made at 15-second intervals over a six-minute period, however, shall not apply. Visible emissions
shall be measured at the densest point of the plume but at a point not less than one-half vehicle length behind the vehicle and not less than one-half the height of the vehicle. [R307-205-4, R307-401-8]

II.B.5.b NEW The haul roads shall not exceed the following lengths:
A. Unpaved haul roads not to exceed 2,734 feet
B. Loader operating area not to exceed 264 feet C. Trackhoe haul roads not to exceed 33 feet. [R307-401-8]
II.B.5.b.1 Compliance shall be determined through Global Positioning System (GPS) measurements or
aerial photographs. [R307-401-8] II.B.5.c The owner/operator shall cover the unpaved haul roads on with road base. [R307-401-8] II.B.5.d The owner/operator shall not have the total area of storage piles exceeding three (3) acres. [R307-401-8]

II.B.5.d.1 Compliance shall be determined through Global Positioning System (GPS) measurements or aerial photographs. [R307-401-8]
II.B.5.e The owner/operator shall apply water to fugitive dust sources to prevent visible emissions from exceeding the opacity limits listed in this AO. The owner/operator may stop applying water to fugitive dust sources when the temperature is below freezing, but shall apply other controls as necessary to prevent visible emissions from exceeding the opacity limits listed in this AO. [R307-205-4, R307-401-8]
II.B.5.e.1 The owner/operator shall keep records of water application and fugitive dust control for all periods when the plant is in operation. The records shall include the following items: A. Date and time treatments were made B. Number of treatments made and quantity of water applied C. Rainfall amount received, if any
D. Records of temperature, if the temperature is below freezing
E. Records of any other controls used to reduce fugitive dust. [R307-205-4, R307-401-8]

II.B.6 Generator Engines:

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 10
II.B.6.a NEW The owner/operator shall install the generator engines that are certified to meet the following emission rates: A. 261 kW generator engine
NOx - 0.29 g/hp-hr or less
CO - 2.61 g/hp-hr or less
B. 275 kW generator engine
NOx - 3.59 g/hp-hr or less
CO - 0.23 g/hp-hr or less C. 87 kW generator engine
NOx - 6.86 g/hp-hr or less
D. 83 kW generator engine
NOx - 0.29 g/hp-hr or less
CO - 2.61g/hp-hr or less. [R307-401-8] II.B.6.a.1 To demonstrate compliance with the emission rate, the owner/operator shall keep a record of the manufacturer's certification of the emission rate. The record shall be kept for the life of
the equipment. [R307-401-8] II.B.6.b The owner/operator shall not allow visible emissions from the generator engines to exceed 20 percent opacity on site. [R307-401-8]
II.B.6.c The owner/operator shall not operate:
A. The 261 kW generator engines for more than 4,380 hours per rolling 12-month period.
B. The 275 kW generator engines for more than 2,340 hours per rolling 12-month period. C. The 87 kW generator engine for more than 100 hours per rolling 12-month period. D. The 83 kW generator engines for more than 4,380 hours per rolling 12-month period. [40 CFR 60 Subpart IIII, 40 CFR 63 Subpart ZZZZ, R307-401-8]
II.B.6.c.1 NEW The owner/operator shall:
A. Determine hours of operation with a non-resettable hour meter for each engine
B. Record hours of operation each day C. Use the hours of operation to calculate a new rolling 12-month total by the 20th day
of each month using data from the previous 12 months
D. Keep hours of operation records for all periods the plant is in operation. [40 CFR 60 Subpart IIII, 40 CFR 63 Subpart ZZZZ, R307-401-8]
II.B.6.d The owner/operator shall only use diesel fuel (e.g. fuel oil #1, #2, or diesel fuel oil additives) as fuel in each engine. [R307-401-8]

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 11
II.B.6.d.1 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. [R307-401-8]
II.B.6.d.2 To demonstrate compliance with the ULSD fuel requirement, the owner/operator shall maintain records of diesel fuel purchase invoices or obtain certification of sulfur content from the diesel fuel supplier. The diesel fuel purchase invoices shall indicate that the diesel fuel meets the ULSD requirements. [R307-401-8]

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 12
PERMIT HISTORY When issued, the approval order shall supersede (if a modification) or will be based on the
following documents: Supersedes AO DAQE-AN129340008-23 dated September 25, 2023
Is Derived From Update Request dated January 14, 2025
REVIEWER COMMENTS 1. Comment regarding Administrative Amendment: As this project is an administrative amendment to update the name of equipment, no changes to emissions have been made at this time. The emissions were calculated for the prior modification as follows:
Emission factors for aggregate crushing/screening/conveying are from AP-42 Section 11.19.2, Table 11.19.2-2 and Appendix B-2. Emission factors for the use of haul roads are from AP-42 Section 13.2.2. Emission factors for generator engines are from the specifications from the engine manufacturer and
AP-42 Section 3.4 Emission factors for storage piles are from AP-42 Section 8.19 (4th edition). Emission factors for disturbed areas are from AP-42 Section 11.9 and 13.2.4.
Emission factors for drilling/blasting are from AP-42 Section 11.9 Emission factors for CO2e are from AP-42 Section 3.3, Tables 3.3-1, and 20 CFR Part 98 Subpart A, Table A-1. [Last updated February 13, 2025]
2. Comment regarding NSPS and MACT: 40 CFR 60 (NSPS).
40 CFR Part 60 Subpart OOO applies to select equipment at nonmetallic mineral processing plants
that commenced construction, modification, or reconstruction after August 31, 1983. The screens, crushers, and transfer/drop points (conveyors, stackers, feed bins) at this facility are subject to 40 CFR Part 60 Subpart OOO.
40 CFR 60 Subpart IIII applies to owner and operators of CI ICE that commence construction, modification, or reconstruction after 07/11/2005. NSPS Subpart IIII applies to this site.
40 CFR 63 (MACT) 40 CFR 63 Subpart ZZZZ applies to owners and operators of stationary RICE at a major or area
source of HAP emissions. Since this source will have a stationary RICE at an area source of HAP emissions, MACT Subpart ZZZZ will apply to this plant. 40 CFR 63 Subpart CCCCCC applies to owners and operators of new or reconstructed gasoline storage tanks. There are no gasoline storage tanks at this site, therefore, Subpart CCCCCC does not apply to this site. [Last updated February 13, 2025]

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 13
3. Comment regarding Title V Requirements: 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) and 40 CFR 63 (MACT) regulations. The facility is not subject to 40 CFR 61 (NESHAP)
regulations. Title V applies to this facility. There is no requirement for this source to apply for a Title V operating permit under current UDAQ and EPA rules. The source will be charged applicable Title V fees and Title V funds may be used for inventory and compliance inspections of this source. [Last updated February 11, 2025]

Engineer Review N129340009: Quality Excavation Inc. - The Desert Canyon Pit - Fort Pierce Industrial Park April 7, 2025 Page 14
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
Mobile crusher with compact dimensionsMetso Lokotrack® LT106™
Lokotrack LT106 mobile jaw crusher is a primary crusher for aggregates production and recycling demolition as well as other crushable
waste. It is ideal for medium-sized aggregates production, as well as recycling demolition waste such as crushing concrete, which can be
re-used as base material for sidewalks, for example. It is designed to be easily transported between sites, quick to set up and to cut overall
operating costs with its reliable performance.
16
IC process control for connectivity
Radio remote for feeder control and
tracking
ICr Connection between multiple units
Metso Metrics for remote
process monitoring
Hydraulically foldable hopper
Wear resistant curved hopper sides
Patented locking mechanism
Extensions for more volume
Grizzly feeder / Pan feeder + scalper 
Automatic speed control (or via radio remote)
Efficient material flow with high stroke vibrating unit
Wear resistant feeder bottom (rubber as an option)
Rotating H5-4 side conveyor
Quick to setup for transport
Discharge on both sides
High speed for stockpile capacity
Heavy-duty tracks and frame
FEM designed structure for optimized weight and lifetime
Open frame design for easy service access
Agile tracks with 2-speed mode for turnability and speed
Fuel-efficient CAT® C9 / C7.1 power transmission
Hydraulic crusher drive with high inertia flywheels
Optimized hydraulics efficiency
Reduced hydraulic oil volume 215 l (57 gal)
H10-11 or H10-14 main conveyor
Hydraulic driven belt conveyor with steel enforcing
Extended conveyor for more discharge height
Height-adjustable magnet for metal separation
C106 jaw crusher
Strong bolted structure
Large stroke and kinematics for hard rock
Hydraulic setting adjustment
Swinging motion for easy cavity clearance
Lokotrack® LT106™ – Mobile jaw crusher
Technical specifications
17
Combine with
• LT200HP, LT200HPX and
LT220D cone crushers
• ST2.3, ST3.8 and ST4.8
mobile screens
Applications
Transport dimensions
Weight 42,000 kg 93,000 lbsLength15,300 mm 50'
Width 2,800 mm 9' 2"
Height 3,400 mm 11' 2"
Feeder TK11-42-2V
Hopper volume 6 / 9 m3 7,9 / 11,8 yd3
Width 1,100mm 43"
Loading height 3,800 mm 12' 6"
Loading width 2,600 / 3,600 mm 8' 6" / 11' 10"
Screen TK11-30S
Decks 1 1
Area 3,3 m2 3,9 yd2
Dimensions 1,100 x 3,000 mm 3' 7" x 9' 10"
Side conveyor H5-4
Width 500 mm 20"
Length 4,000 mm 13' 2"
Discharge height 1,600 mm 5' 3"
Crusher Nordberg® C106™
Feed opening 1,060 x 700 mm 42" x 28"
Drive type Hydraulic Hydraulic
Process control IC IC
Main conveyor H10-11 / H10-14
Width 1,000 mm 39"
Length 11,000 / 14,000 mm 36' 1" / 45' 11"
Discharge height 2,800 / 3,900 mm 9' 2" / 12' 10"
Power unit CAT® C9 / C7.1
Power 224 / 225 kW 300 / 302 hp
Fuel /hydr.oil vol.630 / 215 l 166 / 57 gal
Options
Active Setting Control for crusher
Additional service platform
Automatic lubrication unit
Belt protection plate
Bypass filter for lubrication/
hydraulic oil
Climate kit (hot/cold)
Dischage hood for conveyors
Dust encapsulation for conveyors
Extended main conveyor
Feed hopper extensions
Filter kit
Fuel filling pump
High pressure water spraying
Hydraulic generator
Hydraulic Power Takeoff
ICr remote process control
Interlocking cable
Magnet for metal separation
Metso Metrics
Oil heater for hydraulic oil
Pre-heater for diesel engine
Remote radio control
Rock breaker
Screen module
Side conveyor
See it in 3D at
live.metso.com
Road construction
Railroad ballast
Concrete, demolition
waste
© 2023 Metso Corporatffionfl All trademarks and regffistered trademarks are the property of theffir respectffive ownersfl
Lokotrack® LT106™ – Mobile jaw crusher
Katie Andersen <[e-mail]>
Crusher Manufacturer Information
7 messages
Katie Andersen <[e-mail]>Tue, Feb 11, 2025 at 12:39 PM
To: [e-mail]
Hi Trevor,
I believe we spoke on the phone last Wednesday about my email to Stephanie Gledhill regarding updating Quality
Excacation's Desert Canyon Pit AO to reflect the correct name of the Trackhoe Crusher.
I wanted to follow up to see if you've been able to gather the manufacturer specifications for the crusher.
Also, if you could provide some reasoning why the name change needs to occur, that would be great to have on file.
Cheers,
Katie Andersen
--

Katie Andersen
Environmental Engineer | Minor NSR Section
M: [phone]
airquality.utah.gov
Quality Excavation <[e-mail]>Thu, Feb 13, 2025 at 2:31 PM
To: Katie Andersen <[e-mail]>
Hi Kae,
I have aached the brochure for the Jaw Crusher in this email, which is also the "new" name for the AO. The
reasoning for this change is because that is the name that we use in our system to signify our crusher.
If you have any more quesons, please let me know.
Thank you,
Trevor Black
Quality Excavaon, Inc.
1472 East 3950 South
St. George, Utah 84790
[phone] Cell
3/20/25, 12:44 PM State of Utah Mail - Crusher Manufacturer Information
https://mail.google.com/mail/u/0/?ik=0900585596&view=pt&search=all&permthid=thread-a:r5291903551016770756&simpl=msg-a:r910494515402539…1/3
From: Kae Andersen <[e-mail]>
Sent: Tuesday, February 11, 2025 12:39 PM
To: Quality Excavaon <[e-mail]>
Subject: Crusher Manufacturer Informaon

[Quoted text hidden]
Crusher#4.pdf
438K
Katie Andersen <[e-mail]>Fri, Feb 21, 2025 at 1:08 PM
To: Quality Excavation <[e-mail]>
Trevor,
What is the manufacture date of the crusher?
Cheers,
Katie
[Quoted text hidden]
Quality Excavation <[e-mail]>Mon, Feb 24, 2025 at 9:59 AM
To: Katie Andersen <[e-mail]>
Kae,
The crusher is a 2017.
Thank you,
Trevor Black
Quality Excavaon, Inc.
1472 East 3950 South
St. George, Utah 84790
[phone] Phone
[phone] Cell
From: Kae Andersen <[e-mail]>
Sent: Friday, February 21, 2025 1:08 PM
To: Quality Excavaon <[e-mail]>
Subject: Re: Crusher Manufacturer Informaon

[Quoted text hidden]
Katie Andersen <[e-mail]>Mon, Mar 10, 2025 at 2:07 PM
To: Quality Excavation <[e-mail]>
Hi Trevor,
Based on the information submitted in the last modification, the trackhoe crusher has a specific generator engine that is
used for power. Reading through the files for this modification, it appears that the emissions/modeling was not included for
this generator engine because it was considered a mobile source.
3/20/25, 12:44 PM State of Utah Mail - Crusher Manufacturer Information
https://mail.google.com/mail/u/0/?ik=0900585596&view=pt&search=all&permthid=thread-a:r5291903551016770756&simpl=msg-a:r910494515402539…2/3
The brochure you sent me for the jaw crusher, which is what is replacing the trackhoe crusher, is different from the
specifications for the trackhoe crusher that were provided in the prior modification. Does this jaw crusher also have a
generator engine attached to it for power or will it be powered by one of the generators on site?
Also, what is the rated capacity in tons/hr of the jaw crusher?
Cheers,
Katie
[Quoted text hidden]
Katie Andersen <[e-mail]>Wed, Mar 12, 2025 at 3:52 PM
To: Quality Excavation <[e-mail]>
Trevor,
Thanks for the call today.
I did double check the current AO. It looks like the listed capacity of the "trackhoe crusher" is 400 tph and this was the
listed capacity in the application when it was added to the AO. Do you mind verifying the capacity of the jaw crusher?
Over the phone you said 500 tons per hour,
Cheers,
Katie Andersen
[Quoted text hidden]
Quality Excavation <[e-mail]>Wed, Mar 19, 2025 at 10:52 AM
To: Katie Andersen <[e-mail]>
Kae,
I am sorry it has taken me a while to respond I have been out of the office. You are correct, let's sck with
the listed capacity of 400 tph. If you need anything else please don't hesitate to call.
Thank you,
Trevor Black
Quality Excavaon, Inc.
1472 East 3950 South
St. George, Utah 84790
[phone] Cell
From: Kae Andersen <[e-mail]>
Sent: Wednesday, March 12, 2025 3:52 PM
[Quoted text hidden]

[Quoted text hidden]
3/20/25, 12:44 PM State of Utah Mail - Crusher Manufacturer Information
https://mail.google.com/mail/u/0/?ik=0900585596&view=pt&search=all&permthid=thread-a:r5291903551016770756&simpl=msg-a:r910494515402539…3/3
Katie Andersen <[e-mail]>
Permit Update for 12934 Quality Excavation Desert Canyon Pit
2 messages
Katie Andersen <[e-mail]>Wed, Feb 5, 2025 at 9:42 AM
To: Jared James <[e-mail]>
Hi Jared,
I've been assigned a 10-Year Review for Quality Excavation Desert Canyon Pit, Site ID 12934. From what I can tell from
the notes I've received for the 10-Year Review is that this isn't 10-Year Review (since the most recent AO was is 2023),
but more of an administrative change to update the name of the "Trackhoe Crusher" to "Jaw Crusher" for Equipment Item
II.A.4.
Could you provide me with some more insight about what this administrative change is about?
I looked at the recent compliance inspection report and didn't notice anything about changing the name of equipment.
I appreciate your help.
Cheers,
Katie Andersen
--

Katie Andersen
Environmental Engineer | Minor NSR Section
M: [phone]
airquality.utah.gov
Jared James <[e-mail]>Wed, Feb 5, 2025 at 10:09 AM
To: Katie Andersen <[e-mail]>
Hi Katie
When I was there, there was no trackhoe crusher onsite. So they most likely want to change the crusher to another one
they had available.
[Quoted text hidden]
--
Jared James | Environmental Scientist | Minor Source Compliance
Phone:[phone] email: [e-mail]
2/13/25, 3:13 PM State of Utah Mail - Permit Update for 12934 Quality Excavation Desert Canyon Pit
https://mail.google.com/mail/u/0/?ik=0900585596&view=pt&search=all&permthid=thread-a:r4591372808587536028&simpl=msg-a:r235776328370968…1/2
195 North 1950 West, Salt Lake City, UT 84116
2/13/25, 3:13 PM State of Utah Mail - Permit Update for 12934 Quality Excavation Desert Canyon Pit
https://mail.google.com/mail/u/0/?ik=0900585596&view=pt&search=all&permthid=thread-a:r4591372808587536028&simpl=msg-a:r235776328370968…2/2