DAQ-2025-001467

DAQE-AN140500002-25

{{$d1 }}

Val Rees
Harward & Rees, Inc.
PO Box 279
Loa, UT 84747
[e-mail]

Dear Mr. Rees:

Re: Approval Order: Administrative Amendment to Approval Order DAQE-AN0140500001-07 for a
10-Year Review and Permit Updates Including an Ownership Change and Engine Replacement
Project Number: N140500002

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. Harward & Rees, Inc. must comply with the
requirements of this AO, all applicable state requirements (R307), and Federal Standards.

The project engineer for this action is Lucia Mason, 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:LM:jg

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
Interim Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

March 14, 2025

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

{{#s=Sig_es_:signer1:signature}}
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APPROVAL ORDER
DAQE-AN140500002-25
Administrative Amendment to Approval Order
DAQE-AN0140500001-07 for a 10-Year Review and
Permit Updates Including an Ownership Change
and Engine Replacement

Prepared By
Lucia Mason, Engineer
[phone]
[e-mail]

Issued to
Harward & Rees, Inc. - Snowfield Aggregate Pit

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality
March 14, 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 ..................................................................................................................... 8
ACRONYMS ................................................................................................................................. 9

DAQE-AN140500002-25
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Harward & Rees, Inc. Harward & Rees, Inc. - Snowfield Aggregate Pit

Mailing Address Physical Address
PO Box 279 I-15 Exit 33 North
Loa, UT 84747 St. George, UT

Source Contact UTM Coordinates
Name: Val Rees 300,330 m Easting
Phone: [phone],138,190 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12
SIC code 1442 (Construction Sand & Gravel)

SOURCE INFORMATION
General Description
Harward & Rees, Inc. (Harward & Rees) operates the Snowfield Aggregate Pit on the east side of I-15 by
Exit 33 in Washington County. Equipment at the facility includes two (2) crushers, one (1) screen, one (1)
diesel-fired generator engine, and associated conveyors, loaders, haul trucks, water trucks, and bulldozers.
Harward & Rees can produce up to 700,000 tons of processed aggregate material per year.

NSR Classification
10-Year Review

Source Classification
Located in Attainment Area
Washington County
Airs Source Size: SM

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-AN140500002-25
Page 4

Project Description
This is an Administrative Amendment to AO DAQE-AN0140500001-07, dated August 6, 2007. The DAQ is
conducting a 10-year review to update the permit conditions, format, and rule applicability of the 2007 AO.

In 2023, Harward & Rees replaced the 1,051 hp diesel generator permitted in AO DAQE-AN0140500001-07
(Equipment ID 7.D) with an 800 hp diesel generator. This change qualifies as a reduction in air pollutants
and is thus exempt from the requirement to submit a notice of intent and obtain an approval order prior to
construction under R307-401-12.

Additionally, since 2007, the source has undergone an undocumented ownership change. This 10-year
review incorporates the most recent ownership change.

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 -384.30 1044.00
Carbon Monoxide -5.56 1.23
Nitrogen Oxides -19.59 8.69
Particulate Matter - PM10 -0.69 4.64
Particulate Matter - PM2.5 -0.69 4.64
Sulfur Dioxide -0.49 0.01
Volatile Organic Compounds -0.70 0.17

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Generic HAPs (CAS #GHAPS) -20 20
Change (TPY) Total (TPY)
Total HAPs -0.01 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]
DAQE-AN140500002-25
Page 5

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 five-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 five (5) 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]

SECTION II: PERMITTED EQUIPMENT
II.A THE APPROVED EQUIPMENT
II.A.1 Snowfield Aggregate Pit II.A.2 One (1) Cone Crusher Rating: 300 tons per hour (tph) NSPS Subpart OOO
II.A.3 One (1) Jaw Crusher Rating: 300 tph NSPS Subpart OOO II.A.4 One (1) Screen Dimensions: 8x20 ft NSPS Subpart OOO
II.A.5 Various Conveyors NSPS Subpart OOO II.A.6 One (1) Generator Engine (new) Rating: 800 hp Fuel: Diesel Manufacture year: 2021 NSPS Subpart IIII MACT Subpart ZZZZ
II.A.7 Various Mobile Equipment Including loaders, haul trucks, water trucks, bulldozers, etc. *Listed for informational purposes only
DAQE-AN140500002-25
Page 6

SECTION II: SPECIAL PROVISIONS II.B REQUIREMENTS AND LIMITATIONS
II.B.1 Site-wide Requirements:
II.B.1.a The owner/operator shall process no more than 700,000 tons of aggregate per rolling 12-month period. [R307-401-8]
II.B.1.a.1 To determine compliance with the above production limit, the owner/operator shall:

A. Record production daily

B. 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
C. Keep production records for all periods the plant is in operation.
[R307-401-8]

II.B.2 Aggregate Processing Equipment Requirements:
II.B.2.a The owner/operator shall not exceed the following opacity limits:
A. All crushers - 12%
B. All screens - 10%

C. All conveyor transfer points - 10%
D. All diesel engines - 20%
E. All conveyor drop points - 20%

F. All other points - 20%.
[40 CFR 60 Subpart OOO, R307-401-8]
II.B.2.a.1 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.b The owner/operator shall install water sprays or chemical dust suppression sprays on all crushers, screens, and conveyors transfer points on site to control fugitive emissions. The sprays shall
operate to comply with the opacity limits in this AO. [R307-401-8]
II.B.2.c The owner/operator shall conduct an initial performance test for all crushers, screens, and conveyor transfer points on site within 60 days after achieving maximum production rate but not later than 180 days after initial startup. Performance tests shall meet the limitations specified in Table 3 of Subpart OOO. Records of initial performance tests shall be kept and maintained on-site for the lifetime of the equipment. [40 CFR 60 Subpart A, 40 CFR 60 Subpart OOO]
II.B.2.c.1 Initial performance tests for fugitive emission limits shall be conducted according to 40 CFR 60.675(c). The owner/operator may use methods and procedures specified in 40 CFR 60.675(e)
as an alternative. [40 CFR 60 Subpart OOO]

DAQE-AN140500002-25
Page 7

II.B.3 Generator Engine Requirements: II.B.3.a The owner/operator shall not operate the diesel generator engine more than 2,340 hours per
rolling 12-month period. [R307-401-8]
II.B.3.a.1 To determine compliance with the above operational limit, the owner/operator shall: A. Determine hours of operations by supervisor monitoring and maintaining an operations log B. Record hours of operation daily 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. [R307-401-8]
II.B.3.b The owner/operator shall only use #2 diesel fuel in the generator engine. [R307-401-8]
II.B.3.c 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. [40 CFR 63 Subpart ZZZZ] II.B.3.c.1 The owner/operator shall test the sulfur content of diesel fuel burned in the generator engine if
directed by the Director. The owner/operator shall keep fuel supplier records on-site for the
Director or a representative of the Director. [R307-401-8]
II.B.4 Haul Roads and Fugitive Dust Requirements:
II.B.4.a The owner/operator shall not allow fugitive dust emissions from haul-road traffic and mobile
equipment in operational areas to exceed 20% opacity on-site. [R307-401-8]
II.B.4.a.1 Visible emissions determinations for traffic sources 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. Opacity readings shall be made no less than 1/2 the vehicle length behind the vehicle and at no less than approximately 1/2 the height of the vehicle. [R307-401-8] II.B.4.b The owner/operator shall apply water spray on unpaved haul roads and operational areas used by
mobile equipment such that the surface is in a damp/moist condition to comply with the opacity
limits in this AO, unless the temperature is below freezing. The Director shall approve a chemical treatment plan if any chemical treatment is used. [R307-401-8]

II.B.4.b.1 The owner/operator shall keep records of the following regarding water spray/chemical treatment when the plant is in operation: A. Date and time of application B. Number of treatments made C. Dilution ratio and quantity of treatments D. Approximate amount of rainfall received, if any. [R307-401-8]
II.B.4.c The owner/operator shall not exceed 300 feet of haul roads. [R307-401-8]

DAQE-AN140500002-25
Page 8

II.B.4.d The owner/operator shall limit vehicle speed along the haul roads to 15 miles per hour. The owner/operator shall post vehicle speed on-site at the start of the haul road such that it is clearly visible from the haul road. [R307-401-8] II.B.4.e The owner/operator shall not exceed nine (9) acres of disturbed area. [R307-401-8]

II.B.4.f The owner/operator shall not exceed two (2) acres of storage piles. [R307-401-8] II.B.4.g The owner/operator shall water storage piles to comply with the limits in this AO. The
owner/operator shall keep records of water treatments for all operational periods. [R307-401-8]

PERMIT HISTORY

This Approval Order shall supersede (if a modification) or will be based on the following documents:
Supersedes AO DAQE-AN0140500001-07 dated August 6, 2007 Incorporates Additional Information dated November 14, 2024 Incorporates Additional Information dated January 9, 2025
DAQE-AN140500002-25
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-

RN140500002 February 24, 2025 Val Rees
Harward & Rees, Inc. PO Box 279 Loa, UT 84747
[e-mail] Dear Val Rees,
Re: Engineer Review - Administrative Amendment to Approval Order (AO) DAQE-AN0140500001-07 for a 10-Year Review and Permit Updates Including an Ownership Change and Engine Replacement Project Number: N140500002 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. Harward & Rees, Inc. should complete this review within 10 business days of receipt. Harward & Rees, Inc. should contact Lucia Mason at [phone] if there are questions or concerns
with the review of the draft permit conditions. Upon resolution of your concerns, please email Lucia Mason 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 Harward & Rees, Inc. does not respond to this letter within 10 business days, the project will move forward without source concurrence. If Harward & Rees, 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
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 N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 1
UTAH DIVISION OF AIR QUALITY
ENGINEER REVIEW

SOURCE INFORMATION
Project Number N140500002 Owner Name Harward & Rees, Inc. Mailing Address PO Box 279
Loa, UT, 84747 Source Name Harward & Rees, Inc. -Snowfield Aggregate Pit
Source Location I15 Exit 33 North St. George, UT
UTM Projection 300,330 m Easting, 4,138,190 m Northing UTM Datum NAD83 UTM Zone UTM Zone 12 SIC Code 1442 (Construction Sand & Gravel) Source Contact Val Rees Phone Number [phone] Email [e-mail] Billing Contact Val Rees Phone Number [phone]
Email [e-mail] Project Engineer Lucia Mason, Engineer
Phone Number [phone] Email [e-mail]
Notice of Intent (NOI) Submitted August 9, 2024 Date of Accepted Application November 14, 2024

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 2
SOURCE DESCRIPTION General Description
Harward & Rees Inc. (Harward & Rees) operates the Snowfield Aggregate Pit on the East side of I-15 by Exit 33 in Washington County. Equipment at the facility includes two (2) crushers, one (1) screen, one (1) diesel fired generator engine, and associated conveyors, loaders, haul trucks,
water trucks, and bulldozers. Harward & Rees can produce up to 700,000 tons of processed aggregate material per year. NSR Classification: 10 Year Review Source Classification Located in Attainment Area Washington County Airs Source Size: SM
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 (AO) DAQE-AN0140500001-07 for a 10-Year
Review and Permit Updates Including an Ownership Change and Engine Replacement Project Description This is an Administrative Amendment to Approval Order (AO) DAQE-AN0140500001-07, dated August 6, 2007. The DAQ is conducting a 10-year review to update the permit conditions, format, and rule applicability of the 2007 AO. In 2023, Harward & Rees replaced the 1,051 hp diesel generator permitted in AO DAQE-
AN0140500001-07 (Equipment ID 7.D) with an 800 hp diesel generator. This change qualifies as a reduction in air pollutants and is thus exempt from the requirement to submit a notice of intent and obtain an approval order prior to construction under R307-401-12.
Additionally, since 2007, the source has undergone an undocumented ownership change and an undocumented ownership change. This 10-year review incorporates the most recent ownership
change. EMISSION IMPACT ANALYSIS
This is a 10-year review. The changes in equipment result in a decrease of emissions. Therefore, no modeling is required. [Last updated February 24, 2025]

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 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 -384.30 1044.00 Carbon Monoxide -5.56 1.23
Nitrogen Oxides -19.59 8.69
Particulate Matter - PM10 -0.69 4.64
Particulate Matter - PM2.5 -0.69 4.64
Sulfur Dioxide -0.49 0.01
Volatile Organic Compounds -0.70 0.17 Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Generic HAPs (CAS #GHAPS) -20 20
Change (TPY) Total (TPY)
Total HAPs -0.01 0.01

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

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 4
Review of BACT for New/Modified Emission Units 1. BACT review regarding 10-Year Review
This is a 10-year review. The changes to equipment result in a decrease of emissions. Therefore, a BACT analysis is not required. [Last updated January 28, 2025]
SECTION I: GENERAL PROVISIONS

The intent is to issue an air quality AO authorizing the project with the following recommended conditions and that failure to comply with any of the conditions may constitute a violation of the AO. (New or Modified conditions are indicated as “New” in the Outline Label):
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 five (5) 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 N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 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 NEW Snowfield Aggregate Pit

II.A.2 NEW One (1) Cone Crusher Rating: 300 tons per hour (tph) NSPS Subpart OOO

II.A.3 NEW One (1) Jaw Crusher Rating: 300 tph NSPS Subpart OOO

II.A.4 NEW One (1) Screen Dimensions: 8x20 ft NSPS Subpart OOO

II.A.5 NEW Various Conveyors NSPS Subpart OOO
II.A.6 NEW One (1) Generator Engine (new) Rating: 800 hp Fuel: Diesel Manufacture year: 2021 NSPS Subpart IIII
MACT Subpart ZZZZ
II.A.7 NEW Various Mobile Equipment Including loaders, haul trucks, water trucks, bulldozers, etc
*Listed for informational purposes only

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 6
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 NEW Site-wide Requirements:
II.B.1.a NEW The owner/operator shall process no more than 700,000 tons of aggregate per rolling 12-month period. [R307-401-8]
II.B.1.a.1
NEW
To determine compliance with the above production limit, the owner/operator shall:
A. Record production daily B. 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
C. Keep production records for all periods the plant is in operation
[R307-401-8]
II.B.2
NEW
Aggregate Processing Equipment Requirements:
II.B.2.a NEW The owner/operator shall not exceed the following opacity limits:
A. All crushers - 12%
B. All screens - 10% C. All conveyor transfer points - 10% D. All diesel engines - 20% E. All conveyor drop points - 20% F. All other points - 20%
[40 CFR 60 Subpart OOO, R307-401-8]
II.B.2.a.1 NEW 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.b
NEW
The owner/operator shall install water sprays or chemical dust suppression sprays on all
crushers, screens, and conveyors transfer points on site to control fugitive emissions. The sprays shall operate to comply with the opacity limits in this AO. [R307-401-8]

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 7
II.B.2.c NEW The owner/operator shall conduct an initial performance test for all crushers, screens, and conveyor transfer points on site within 60 days after achieving maximum production rate but not later than 180 days after initial startup. Performance tests shall meet the limitations
specified in Table 3 of Subpart OOO. Records of initial performance tests shall be kept and maintained on site for the lifetime of the equipment. [40 CFR 60 Subpart A, 40 CFR 60 Subpart OOO]

II.B.2.c.1 NEW Initial performance tests for fugitive emission limits shall be conducted according to 40 CFR 60.675(c). The owner/operator may use methods and procedures specified in 40 CFR 60.675(e) as an alternative. [40 CFR 60 Subpart OOO]
II.B.3 NEW Generator Engine Requirements:
II.B.3.a NEW The owner/operator shall not operate the diesel generator engine more than 2,340 hours per rolling 12-month period. [R307-401-8]
II.B.3.a.1 NEW To determine compliance with the above operational limit, the owner/operator shall: A. Determine hours of operations by supervisor monitoring and maintaining an
operations log
B. Record hours of operation daily
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
[R307-401-8]
II.B.3.b
NEW
The owner/operator shall only use #2 diesel fuel in the generator engine. [R307-401-8]

II.B.3.c 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. [40 CFR 63 Subpart ZZZZ]
II.B.3.c.1 NEW The owner/operator shall test the sulfur content of diesel fuel burned in the generator engine if directed by the Director. The owner/operator shall keep fuel supplier records on-site for the
Director or a representative of the Director. [R307-401-8] II.B.4 NEW Haul Roads and Fugitive Dust Requirements:
II.B.4.a
NEW
The owner/operator shall not allow fugitive dust emissions from haul-road traffic and mobile
equipment in operational areas to exceed 20% opacity on site. [R307-401-8]
II.B.4.a.1 NEW Visible emissions determinations for traffic sources 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. Opacity readings shall be made no less than 1/2 the vehicle length behind the vehicle and at no less than approximately 1/2 the height of the vehicle. [R307-401-8]

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 8
II.B.4.b NEW The owner/operator shall apply water spray on unpaved haul roads and operational areas used by mobile equipment such that the surface is in a damp/moist condition to comply with the opacity limits in this AO, unless the temperature is below freezing. The Director shall approve
a chemical treatment plan if any chemical treatment is used. [R307-401-8] II.B.4.b.1 NEW The owner/operator shall keep records of the following regarding water spray/ chemical treatment when the plant is in operation: A. Date and time of application B. Number of treatments made C. Dilution ratio and quantity of treatments
D. Approximate amount of rainfall received, if any
[R307-401-8]
II.B.4.c NEW The owner/operator shall not exceed 300 feet of haul roads. [R307-401-8] II.B.4.d NEW The owner/operator shall limit vehicle speed along the haul roads to 15 miles per hour. The owner/operator shall post vehicle speed on site at the start of the haul road such that it is clearly visible from the haul road. [R307-401-8]
II.B.4.e NEW The owner/operator shall not exceed nine (9) acres of disturbed area. [R307-401-8] II.B.4.f NEW The owner/operator shall not exceed two (2) acres of storage piles. [R307-401-8]
II.B.4.g NEW The owner/operator shall water storage piles to comply with the limits in this AO. The owner/operator shall keep records of water treatments for all operational periods. [R307-401-8]

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 9
PERMIT HISTORY When issued, the approval order shall supersede (if a modification) or will be based on the
following documents: Supersedes AO DAQE-AN0140500001-07 dated August 6, 2007
Incorporates Proof of Ownership Change dated November 14, 2024 Incorporates Documentation of Engine Replacement dated January 9, 2025
REVIEWER COMMENTS 1. Comment regarding 10-Year Review: This is a 10-year review. The language and formatting of this AO have been updated to reflect the style of modern permits. PTE values and the approved equipment list have been moved to respective new sections. The source underwent two undocumented ownership changes since 2007. The most recent of which took place in 2023 when Snowfield Rock Products, LLC leased the site to Harward and Rees, Inc. On November 14th, 2024, Harward and Rees provided proof of the 2023 ownership change. This 10-year review incorporates the associated name change. On December 11, 2024, the source confirmed over the phone that the approved cone crusher (Equipment ID II.A.2) and jaw crusher (Equipment ID II.A.3) are not currently on site. 40 CFR 60
Subpart OOO specifies a 12% opacity limit for crushers installed or modified on or after April 22, 2008. If either of the two (2) approved crushers are reinstalled at the facility they will have been modified after April 22, 2008, and will be subject to the 12% opacity limit. The crusher opacity limit
listed in condition II.B.2.a has been updated accordingly. On December 13, 2024, Harward & Rees confirmed the 1,051 hp diesel generator permitted in AO DAQE-AN0140500001-07 (Equipment ID 7.D) had been replaced with an 800 hp diesel generator (Equipment ID II.A.6) in 2023. The source provided the model, make, and manufacture year of the
replacement engine on January 9, 2025. From this information, it was determined the engine is tier 2 certified using EPA's "nonroad-compression-ignition-2011-present" spreadsheet*. The replacement engine is tier 2 certified and rated at a lower hp than the removed engine. Thus, the engine
replacement qualifies as a reduction in air pollutants and exempt from the requirement to submit a notice of intent and obtain an approval order prior to construction under R307-401-12. Harward & Rees did not submit a NOI for the change in 2023; this 10-year review incorporates the relevant
changes to equipment and emissions. The change in emissions resulting from the engine replacement is documented in Comment 2, "Emission Calculations." *EPA's "nonroad-compression-ignition-2011-present" spreadsheet is included in the source file. The excel file can also be downloaded from EPA's "Annual Certification Data for Vehicles, Engines, and
Equipment" webpage.
[Last updated February 24, 2025] 2. Comment regarding Emission Calculations: The PTE for PM2.5 and CO2e was not specified in the 2007 AO. Both have been added to the Summary of Emissions. For a conservative estimate, the PTE of PM2.5 was set equal to the PTE of PM10 after the engine replacement. CO2e emissions were calculated using emission factors and

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 10
global warming potentials from the sources specified below. PM10 emissions were determined by subtracting the removed generator's PM10 emissions and adding replacement generator's the PM10 emissions to the PTE listed in the 2007 AO. The replacement generator is the only combustion equipment onsite. Thus, all other PTE values are equal to the emissions from the replacement generator. PM10 emissions for the removed engine were calculated using the emission factors and operating parameters listed under "Removed Generator Emissions"
below. Emissions for the replacement engine were calculated using the operating parameters and emission factors listed under "Replace Generator Emissions" below. Removed Generator PM10 Emissions: Rating: 1051 hp
Annual Operating Hours: 2,340 (limited in condition II.B.2.a) Emission Factors: PM10, CO2e: AP-42 Table 3.4-1 Global Warming Potentials: 40 CFR Table A-1 to Subpart A of Part 98 Emissions from removed engine- PM10: 0.86 tpy, CO2e: 1,429 tpy Replacement Generator Emissions: Rating: 800 hp Annual Operating Hours: 2,340 (limited in condition II.B.2.a) Emission Factors: NOx, PM10, VOC, CO2: EPA's "nonroad-compression-ignition-2011-present" spreadsheet* (engine
model C18, engine family MCPXL18.1NYS, model year 2021, NOx: 5.56 g/kW-hr, PM10: 0.11 g/kW-hr, VOC: 0.11g/kW-hr, CO2: 677.58 g/kW-hr) SO2, CH4: AP-42 Table 3.4-1
Global Warming Potentials: 40 CFR Table A-1 to Subpart A of Part 98 Emissions from replacement engine- NOx: 8.69 tpy, CO: 1.23 tpy, PM10: 0.17 tpy, VOC: 0.17 tpy, SO2: 0.1 tpy, HAP 0.01 tpy, CO2e: 1,044
*EPA's "nonroad-compression-ignition-2011-present" spreadsheet is included in the source file. The excel file can also be downloaded from EPA's "Annual Certification Data for Vehicles, Engines, and Equipment" webpage. [Last updated February 24, 2025] 3. Comment regarding Compliance Notes: AO DAQE-AN0140500001-07 did not specify the applicability of 40 CFR 60 Subpar IIII or 40 CFR 63 Subpart ZZZZ. Both subparts are applicable to the facility. The source should review the NSPS Subpart IIII and MACT Subpart ZZZZ to ensure compliance.
On December 11, 2024, the source confirmed over the phone that the cone crusher (Equipment ID
II.A.2), the jaw crusher (Equipment ID II.A.3), the screen (Equipment ID II.A.3), and the diesel generator engine (Equipment ID II.A.6) were all currently at a different site. The source must notify the DAQ and comply with the conditions regarding modified sources in UAC R307-401 if any
equipment that is not listed in Section II: Permitted Equipment is brought on site. If the crushers listed in Equipment IDs II.A.2 and II.A.3 are brought back on site, they must comply with a 12% opacity limit in accordance with condition II.B.2.a and 40 CFR 60 Subpart OOO. As part of maintaining this AO, the source will be charged annual aggregate and NSR fees. Conditions II.B.2.c and II.B.2.c.1 have been added to the permit regarding initial performance tests

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 11
on aggregate processing equipment. The source should review these conditions and confirm that initial performance tests are available for each piece of equipment on site. If any equipment brought
on site is missing initial performance tests the source must conduct new performance tests to meet the requirements in conditions II.B.2.c and II.B.2.c.1. The source should review conditions II.B.4.c, II.B.4.e, and II.B.4.f which limit haul road lengths, disturbed area, and storage piles respectively. If the Snowfield Aggregate Pit exceeds the permitted
limits Harward & Rees must notify the DAQ and take action to return to compliance.
[Last updated February 24, 2025] 4. Comment regarding Federal Standard Applicability:
NSPS Subpart IIII: Standards of Performance for Stationary Compression Ignition Internal Combustion Engines. Subpart IIII applies to non-fire pump compression ignition internal combustion engines with model years of 2007 or later. The diesel generator listed in Equipment ID II.A.13 was manufactured in 2021. Thus, NSPS Subpart IIII applies.
NSPS Subpart OOO: Standards of Performance for Nonmetallic Mineral Processing Plants. Subpart OOO applies to facilities that operate crushers, screens and belt conveyors among other aggregate processing equipment. The facility operates crushers, screens and other aggregate processing equipment. Therefore, Subpart OOO applies.
MACT Subpart ZZZZ: National Emission Standards for Hazardous Air Pollutants for Stationary Reciprocating Internal Combustion Engines. Subpart ZZZZ applies to facilities which operate reciprocating internal combustion engines. The generator at the facility falls under this definition. Thus, Subpart ZZZZ applies.
[Last updated February 24, 2025]
5. 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. However, the facility is subject to 40 CFR 60 (NSPS) Subpart OOO under Section 111 of the Act. Therefore, Title V regulations apply to the facility as an area source.
[Last updated February 24, 2025]

Engineer Review N140500002: Harward & Rees, Inc. -Snowfield Aggregate Pit February 24, 2025 Page 12
ACRONYMS The following lists commonly used acronyms and associated translations as they apply to this document:
40 CFR Title 40 of the Code of Federal Regulations AO Approval Order BACT Best Available Control Technology
CAA Clean Air Act CAAA Clean Air Act Amendments CDS Classification Data System (used by EPA to classify sources by size/type) CEM Continuous emissions monitor CEMS Continuous emissions monitoring system CFR Code of Federal Regulations CMS Continuous monitoring system CO Carbon monoxide CO2 Carbon Dioxide CO2e Carbon Dioxide Equivalent - 40 CFR Part 98, Subpart A, Table A-1 COM Continuous opacity monitor
DAQ/UDAQ Division of Air Quality DAQE This is a document tracking code for internal UDAQ use EPA Environmental Protection Agency
FDCP Fugitive dust control plan GHG Greenhouse Gas(es) - 40 CFR 52.21 (b)(49)(i) GWP Global Warming Potential - 40 CFR Part 86.1818-12(a)
HAP or HAPs Hazardous air pollutant(s) ITA Intent to Approve LB/HR Pounds per hour
LB/YR Pounds per year MACT Maximum Achievable Control Technology MMBTU Million British Thermal Units
NAA Nonattainment Area NAAQS National Ambient Air Quality Standards NESHAP National Emission Standards for Hazardous Air Pollutants NOI Notice of Intent NOx Oxides of nitrogen NSPS New Source Performance Standard NSR New Source Review PM10 Particulate matter less than 10 microns in size
PM2.5 Particulate matter less than 2.5 microns in size PSD Prevention of Significant Deterioration PTE Potential to Emit
R307 Rules Series 307 R307-401 Rules Series 307 - Section 401 SO2 Sulfur dioxide
Title IV Title IV of the Clean Air Act Title V Title V of the Clean Air Act TPY Tons per year
UAC Utah Administrative Code VOC Volatile organic compounds
14050 SUMMARY
Criteria Pollutant Old Engine PTE New Engine PTE 2007 PTE
NOX 8.69 28.28
CO 1.23 6.79
PM10 0.86 0.17 5.33
PM2.5 0.86 0.17 5.33
VOC 0.17 0.87
SO2 0.01 0.5
HAP 0.01 0.02
Green House Gas Pollutant
Emission
Total
(tons/year)
Emission
Total
(tons/year)
CO2 (mass basis)1426.42 1042.64
Methane (mass basis)0.08 0.06
CO2e 1428.60 1044.30
Hazardous Air Pollutant
Emission
Total
(tons/year)
Emission
Total
(tons/year)
Benzene 0.01 0.01
Toluene 0.00 0.00
Xylenes 0.00 0.00
Formaldehyde 0.00 0.00
Acetaldehyde 0.00 0.00
Acrolein 0.00 0.00
Naphthalene 0.00 0.00
Acenaphthylene 0.00 0.00
Acenaphthene 0.00 0.00
Fluorene 0.00 0.00
Phenanthrene 0.00 0.00
Anthracene 0.00 0.00
Fluoranthene 0.00 0.00
Pyrene 0.00 0.00
Benz(a)anthracene 0.00 0.00
Chrysene 0.00 0.00
Benzo(b)fluoranthene 0.00 0.00
Benzo(k)fluoranthene 0.00 0.00
Benzo(a)pyrene 0.00 0.00
Indeno(1,2,3-cd)pyrene 0.00 0.00
Dibenz(a,h)anthracene 0.00 0.00
Benzo(g,h,l)perylene 0.00 0.00
Generic HAPs
tpy
2025 PTE Change in PTE
8.69 -19.59
1.23 -5.56
4.64 -0.69
4.64 -0.69
0.17 -0.70
0.01 -0.49
0.01 -0.01
EmissionTotal(tons/year)Change in PTE
1042.64
0.06
1044.30 -384.30
EmissionTotal(tons/year)
0.0051 38
0.0018
0.0013
0.0005
0.0002
0.0001
0.0009
0.0001
0.0000
0.0001
0.0003
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.0000
0.00075 0.0005
* Due to change in emission calculations and the fact that this is a 10YR I choose to make the cha
ange just in the overall HAPs instead of seperating out the components
Equipment Details
Rating 800 hp = (597.1 kw)
Operational Hours 2,340 hours/year
Sulfur Content 15 ppm or 0.0015%
Criteria Pollutant
Emission
Standards
(g/hp-hr)
Emission Factor
(lb/hp-hr)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
NOX 4.21 7.43 8.69
CO 0.60 1.05 1.23
PM10 0.08 0.14 0.17
PM2.5 0.08 0.14 0.17
VOC 0.08 0.14 0.17
SO2 1.21E-05 0.01 0.01 AP-42 Table 3.4-1
HAP 0.01 0.01 See Below
Green House Gas Pollutant
Global
Warming
Potential
Emission Factor
(lb/hp-hr)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
CO2 (mass basis)1 1.11 891 1,043
Methane (mass basis)28 6.35E-05 0 0
CO2e 1,044
Hazardous Air Pollutant
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
Benzene 7.76E-04 4.35E-03 5.08E-03
Toluene 2.81E-04 1.57E-03 1.84E-03
Xylenes 1.93E-04 1.08E-03 1.26E-03
Formaldehyde 7.89E-05 4.42E-04 5.17E-04Acetaldehyde2.52E-05 1.41E-04 1.65E-04
Acrolein 7.88E-06 4.41E-05 5.16E-05
Naphthalene 1.30E-04 7.28E-04 8.52E-04
Acenaphthylene 9.23E-06 5.17E-05 6.05E-05
Acenaphthene 4.68E-06 2.62E-05 3.07E-05
Fluorene 1.28E-05 7.17E-05 8.39E-05
Phenanthrene 4.08E-05 2.28E-04 2.67E-04
Anthracene 1.23E-06 6.89E-06 8.06E-06Fluoranthene4.03E-06 2.26E-05 2.64E-05
Pyrene 3.71E-06 2.08E-05 2.43E-05
Benz(a)anthracene 6.22E-07 3.48E-06 4.08E-06
Chrysene 1.53E-06 8.57E-06 1.00E-05
Benzo(b)fluoranthene 1.11E-06 6.22E-06 7.27E-06
Benzo(k)fluoranthene 2.18E-07 1.22E-06 1.43E-06
Benzo(a)pyrene 2.57E-07 1.44E-06 1.68E-06
Indeno(1,2,3-cd)pyrene 4.14E-07 2.32E-06 2.71E-06Dibenz(a,h)anthracene 3.46E-07 1.94E-06 2.27E-06Benzo(g,h,l)perylene 5.56E-07 3.11E-06 3.64E-06
Emission Factor
(lb/MMBtu)
AP-42 Table 3.3-2,
Table 3.4-3, &
Table 3.4-4
(1,3-Butadiene will
not popluate if the
engine size is greater
than 600 hp. AP-42
does not list 1,3-
Butadiene for
engines greater than 600 hp.)
Diesel-Fired Engines
Emergency Engines should
equal 100 hours of operation
per year
Manufacturer Data,
AP-42 Table 3.3-1,
& Table 3.4-1
AP-42 Table 3.3-1
& Table 3.4-1, Table
A-1 to Subpart A of
Part 98
Page 4 of 5 Version 1.1
February 21, 2019
Equipment Details
Rating 1,051 hp = (784.4 kw)
Operational Hours 2,340 hours/year
Sulfur Content 15 ppm or 0.0015%
Criteria Pollutant
Emission
Standards
(g/hp-hr)
Emission Factor
(lb/hp-hr)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
NOX 0.024 25.22 29.51
CO 5.50E-03 5.78 6.76
PM10 7.00E-04 0.74 0.86
PM2.5 7.00E-04 0.74 0.86
VOC 6.42E-04 0.67 0.79
SO2 1.21E-05 0.01 0.01 AP-42 Table 3.4-1
HAP 0.01 0.01 See Below
Green House Gas Pollutant
Global
Warming
Potential
Emission Factor
(lb/hp-hr)
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
CO2 (mass basis)1 1.16 1,219 1,426
Methane (mass basis)28 6.35E-05 0 0CO2e1,429
Hazardous Air Pollutant
Emission
Rate
(lbs/hr)
Emission
Total
(tons/year)Reference
Benzene 7.76E-04 5.71E-03 6.68E-03
Toluene 2.81E-04 2.07E-03 2.42E-03
Xylenes 1.93E-04 1.42E-03 1.66E-03
Formaldehyde 7.89E-05 5.80E-04 6.79E-04
Acetaldehyde 2.52E-05 1.85E-04 2.17E-04
Acrolein 7.88E-06 5.80E-05 6.78E-05
Naphthalene 1.30E-04 9.56E-04 1.12E-03
Acenaphthylene 9.23E-06 6.79E-05 7.94E-05
Acenaphthene 4.68E-06 3.44E-05 4.03E-05
Fluorene 1.28E-05 9.42E-05 1.10E-04Phenanthrene4.08E-05 3.00E-04 3.51E-04
Anthracene 1.23E-06 9.05E-06 1.06E-05
Fluoranthene 4.03E-06 2.96E-05 3.47E-05
Pyrene 3.71E-06 2.73E-05 3.19E-05
Benz(a)anthracene 6.22E-07 4.58E-06 5.35E-06
Chrysene 1.53E-06 1.13E-05 1.32E-05
Benzo(b)fluoranthene 1.11E-06 8.17E-06 9.55E-06
Benzo(k)fluoranthene 2.18E-07 1.60E-06 1.88E-06
Benzo(a)pyrene 2.57E-07 1.89E-06 2.21E-06
Indeno(1,2,3-cd)pyrene 4.14E-07 3.05E-06 3.56E-06
Dibenz(a,h)anthracene 3.46E-07 2.55E-06 2.98E-06Benzo(g,h,l)perylene 5.56E-07 4.09E-06 4.79E-06
Emission Factor
(lb/MMBtu)
AP-42 Table 3.3-2,
Table 3.4-3, &
Table 3.4-4
(1,3-Butadiene will
not popluate if the
engine size is greater
than 600 hp. AP-42
does not list 1,3-
Butadiene for engines greater than
600 hp.)
Diesel-Fired Engines
Emergency Engines should
equal 100 hours of operation
per year
Manufacturer Data,
AP-42 Table 3.3-1,
& Table 3.4-1
AP-42 Table 3.3-1
& Table 3.4-1
Page 5 of 5 Version 1.1
February 21, 2019
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Model Year Engine Family Manufacturer Certificate #
2021 MCPXL18.1NYS Caterpillar Inc.MCPXL18.1NYS-005
2021 MCPXL18.1NYS Caterpillar Inc.MCPXL18.1NYS-005
2021 MCPXL18.1NYS Caterpillar Inc.MCPXL18.1NYS-005
2021 MCPXL18.1NYS Caterpillar Inc.MCPXL18.1NYS-005
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Issue Date Commerce Introduction Date Carryover Engine Family Name
5/7/2020 12/1/2020 LCPXL18.1NYS
5/7/2020 12/1/2020 LCPXL18.1NYS
5/7/2020 12/1/2020 LCPXL18.1NYS
5/7/2020 12/1/2020 LCPXL18.1NYS
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Power Category Applicatable Regulation
560<kW<=2237 Part 60 only certified to the requirements of part 89
560<kW<=2237 Part 60 only certified to the requirements of part 89
560<kW<=2237 Part 60 only certified to the requirements of part 89
560<kW<=2237 Part 60 only certified to the requirements of part 89
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Applicable Tier Applicable Compliance Standard
Tier 2 Not Applicable
Tier 2 Not Applicable
Tier 2 Not Applicable
Tier 2 Not Applicable
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Fuel
300-500 ppm Low Sulfur Diesel
300-500 ppm Low Sulfur Diesel
300-500 ppm Low Sulfur Diesel
300-500 ppm Low Sulfur Diesel
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Fuel Meter System
Direct Diesel Injection
Direct Diesel Injection
Direct Diesel Injection
Direct Diesel Injection
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Useful Life of Engine Family Engine Combustion Cycle
10 years / 8,000 hrs 4 Stroke Compression Ignition
10 years / 8,000 hrs 4 Stroke Compression Ignition
10 years / 8,000 hrs 4 Stroke Compression Ignition
10 years / 8,000 hrs 4 Stroke Compression Ignition
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Non Aftertreatment Device Type
Electronic Control; Engine Design Modification
Electronic Control; Engine Design Modification
Electronic Control; Engine Design Modification
Electronic Control; Engine Design Modification
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Aftertreatment Device Type
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
NMHC NOx NMHC+NOx CO PM CO2 N2O CH4
0.13 5.42 5.6 0.9 0.05 709.22
0.11 5.65 5.8 0.8 0.11 677.58
0.11 5.06 5.2 0.8 0.07 682.7
0.12 5.09 5.2 0.8 0.07 682.25
Certification Level Steady-State Discrete Modal Test Results (g/kW-hr)
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
NMHC NOx NMHC+NOx CO PM CO2 N2O
Certification Level Transient Test Results (g/kW-hr)
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
CH4 Acceleration LUG Peak NOx NMHC+NOx PM
7 3 10
Smoke Opacity (in pct)FEL (g/kW-hr)
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Engine Model Engine Code Displacement
C18 CERT TEST 3 18.131
C18 CERT TEST 2 18.131
C18 CERT TEST 1 18.131
C18 CERT TEST 1 18.131
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Certification Fuel
300-500 ppm Low Sulfur Diesel
300-500 ppm Low Sulfur Diesel
300-500 ppm Low Sulfur Diesel
300-500 ppm Low Sulfur Diesel
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Engine Operation Test Procedure
Constant Speed Steady-State 5-Mode Cycle
Variable Speed Steady-State 8-Mode Cycle
Constant Speed Steady-State 5-Mode Cycle
Constant Speed Steady-State 5-Mode Cycle
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Test Type
Discrete-Modal Testing
Discrete-Modal Testing
Discrete-Modal Testing
Discrete-Modal Testing
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Model Year Engine Family Engine Model Engine Code
2021 MCPXL18.1NYS C18 8
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Engine Block Arrangement Number Cylinders Bore (MM) Stroke (MM)
Inline 6 145 183
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Rated Power (KW)Rated Speed (RPM)Maximum Torque (NM)
570 2100 3495
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Speed Maximum Torque (RPM)Maximum Test Speed (RPM)
1400 2100
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Torque Max Test Speed (RPM)Maximum Engine Power (KW)
2594 570
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Intermediate Test Speed (RPM)Lower Tolerance Max Power (KW)
1400 5
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Upper Tolerance Max Power (KW)Fuel Rate Max Torque (MM3 stroke)
5 482.1
OTAQ; Last Updated:
11/26/2024
Nonroad Compression-Ignition Engines
Certification Data
Fuel Rate Max Speed (MM3 stroke)Method Aspiration
372.3 Turbocharged
OTAQ; Last Updated:
11/26/2024
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Variable Valve Timing Ind Variable Valve Timing Description
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Total Displacement Sales Area
18.131 Both

DAQE-AN0140500001-07

August 6, 2007

Doug Rogers
Rogers Rock
85 East 750 South
St. George, Utah 84770

Dear Mr. Rogers:

Re: Approval Order: Request to Operate a Rock Crushing and Screening Operation Washington
County – CDS B; ATT; NSPS
Project Code: 014050-0001

The attached document is the Approval Order for the above-referenced project.

Future correspondence on this Approval Order should include the engineer's name as well as the DAQE
number as shown on the upper right-hand corner of this letter. Please direct any technical questions you
may have on this project to Mr. Tom Bradley. He may be reached at [phone].

Sincerely,

M. Cheryl Heying, Executive Secretary
Utah Air Quality Board

MCH:TJB:kw

cc: Southwest Utah Public Health Department

150 North 1950 West • PO Box 144820 • Salt Lake City, UT 84114-4820 • phone [phone] • fax [phone]
T.D.D. [phone] • www.deq.utah.gov
State of Utah

Department of
Environmental Quality

Richard W. Sprott
Executive Director

DIVISION OF AIR QUALITY
Cheryl Heying
Director

JON M. HUNTSMAN, JR.
Governor

GARY HERBERT
Lieutenant Governor

STATE OF UTAH

Department of Environmental Quality

Division of Air Quality

APPROVAL ORDER: Request to
Operate a Rock Crushing and
Screening Operation

Prepared By: Tom Bradley, Engineer
[phone]
Email: [e-mail]

APPROVAL ORDER NUMBER

DAQE-AN0140500001-07

Date: August 6, 2007

Rogers Rock
Source Contact
Doug Rogers
[phone]

M. Cheryl Heying
Executive Secretary
Utah Air Quality Board

Abstract

Rogers Rock has requested approval to operate a rock crushing and screening operation near St. George
in Washington County. Rogers Rock will be operating two crushers, one screen, and one 1051 hp diesel
generator.

Washington County is an attainment area of the National Ambient Air Quality Standards (NAAQS) for
all pollutants. New Source Performance Standards (NSPS) applies to this source. National Emission
Standards for Hazardous Air Pollutants (NESHAP) and Maximum Achievable Control Technology
(MACT) regulations do not apply to this source. Title V of the 1990 Clean Air Act applies to this source.

The emissions will be as follows, in tons per year, potential to emit totals: PM10 = 5.33, NOx = 28.28,
SO2 = 0.50, CO = 6.79, VOC = 0.87, HAPS = 0.02

The project has been evaluated and found to be consistent with the requirements of the Utah
Administrative Code Rule 307 (UAC R307). A public comment period was held in accordance with UAC
R307-401-7 and no comments were received. This air quality Approval Order (AO) authorizes the project
with the following conditions, and failure to comply with any of the conditions may constitute a violation
of this order.

General Conditions:

1. This AO applies to the following company:

Office Location:
Rogers Rock
85 East 750 South
St. George, UT 84770

The equipment listed below in this AO shall be operated at the following location:

Plant Location:

I-15 Exit 33, East side of freeway turn north to pit

Universal Transverse Mercator (UTM) Coordinate System: 4,138.29 km. Northing,
300.42 km. Easting, Zone 12, UTM datum NAD27

2. All definitions, terms, abbreviations, and references used in this AO conform to those used
in the UAC R307 and Title 40 of the Code of Federal Regulations (40 CFR). Unless noted
otherwise, references cited in these AO conditions refer to those rules.

3. The limits set forth in this AO shall not be exceeded without prior approval in accordance
with R307-401.

4. Modifications to the equipment or processes approved by this AO that could affect the
emissions covered by this AO must be reviewed and approved in accordance with R307-
401.
DAQE-AN0140500001-07
Page 3
5. All records referenced in this AO or in applicable NSPS standards, which are required to
be kept by the owner/operator, shall be made available to the Executive Secretary or
Executive Secretary’s representative upon request. Records shall be kept for the following
minimum periods:

A. Emission inventories Five years from the due date of each emission statement
or until the next inventory is due, whichever is longer

B. All other records Five years

6. Rogers Rock shall install and operate rock crushing and screening operation and shall
conduct its operations in accordance with the terms and conditions of this AO, which was
written pursuant to Rogers Rock’s NOI submitted to the Division of Air Quality (DAQ) on
May 14, 2007.

7. The approved installations shall consist of the following equipment or equivalent*:

A. One (1) Cone Crusher* – 300 tph

B. One (1) Jaw Crusher* – 300 tph

C. One (1) Screen* – 8’ x 20’

D. One (1) 1051 hp diesel generator

E. Associated equipment (Conveyors, loaders, haul trucks, water trucks, bulldozers,
etc.)

* Equivalency shall be determined by the Executive Secretary.

8. The source shall notify the Executive Secretary in writing when the equipment listed in
Condition #7 has been installed and is operational, as an initial compliance inspection is
required. To insure proper credit when notifying the Executive Secretary, send your
correspondence to the Executive Secretary, attn: Compliance Section.

If installation has not been completed within eighteen months from the date of this AO, the
Executive Secretary shall be notified in writing on the status of the installation. At that
time, the Executive Secretary shall require documentation of the continuous installation of
the operation and may revoke the AO in accordance with R307-401-18.

Limitations and Test Procedures

9. Visible emissions from the following emission points shall not exceed the following
values:

A. All crushers - 15% opacity
B. All screens - 10% opacity
DAQE-AN0140500001-07
Page 4
C. All conveyor transfer points - 10% opacity
D. All diesel engines - 20% opacity
E. Conveyor drop points - 20% opacity
F. All other points - 20% opacity
Opacity observations of emissions from stationary sources shall be conducted according to
40 CFR 60, Appendix A, Method 9. Visible emissions from mobile sources and
intermittent sources shall use procedures similar to Method 9, but the requirement for
observations to be made at 15-second intervals over a six-minute period shall not apply.
Any time interval with no visible emissions shall not be included.

10. Visible fugitive dust emissions from haul-road traffic and mobile equipment in operational
areas shall not exceed 20% opacity. Visible emissions determinations for traffic sources
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. Six
points, distributed along the length of the haul road or in the operational area, shall be
chosen by the Executive Secretary or the Executive Secretary’s representative. An opacity
reading shall be made at each point when a vehicle passes the selected points. Opacity
readings shall be made ½ the vehicle length or greater behind the vehicle and at
approximately ½ the height of the vehicle or greater. The accumulated six readings shall
be averaged for the compliance value.

11. The haul road shall not exceed 300 feet in length and the vehicle speed along the haul road
shall not exceed 15 miles per hour. The vehicle speed on the haul road shall be posted, at a
minimum, on site at the beginning of the haul road so that it is clearly visible from the haul
road.

12. The open or disturbed area shall not exceed 9 acres without prior approval from the
Executive Secretary.

13. The total area of storage piles shall not exceed 2 acres without prior approval from the
Executive Secretary.

14. The following production / consumption limits shall not be exceeded:

A. 700,000 tons of processed aggregate per rolling 12-month period

B. 2340 hours of operation for the generator per rolling 12-month period

Compliance with the annual limitations shall be determined on a rolling 12-month total.
The owner/operator shall calculate a new 12-month total based on the twentieth day of
each month using data from the previous 12 months. Records of consumption/production
shall be kept for all periods when the plant is in operation. Records of consumption/
production, including rolling 12-month totals shall be made available to the Executive

DAQE-AN0140500001-07
Page 5
Secretary or Executive Secretary’s representative upon request and shall include a period
of two years ending with the date of the request. The records shall be kept on a daily basis.
The hours of operation shall be determined by examination of the operational log which
shall be maintained.

Roads and Fugitive Dust

15. All unpaved roads and other unpaved operational areas that are used by mobile equipment
shall be water sprayed to control fugitive dust. The application of water treatment shall be
used. Treatment shall be of sufficient frequency and quantity to maintain the surface
material in a damp/moist condition. The opacity shall not exceed 20% during all times the
areas are in use or unless it is below freezing. If chemical treatment is to be used, the plan
must be approved by the Executive Secretary. Records of water and/or chemical treatment
shall be kept for all periods when the plant is in operation. The records shall include the
following items:

A. Date and time of day treatments were made
B. Number of treatments made, dilution ratio, and quantity
C. Rainfall received, if any, and approximate amount
Records of treatment shall be made available to the Executive Secretary upon request and
shall include a period of two years ending with the date of the request.

16. Water sprays or chemical dust suppression sprays shall be installed at the following points
to control fugitive emissions:

A. All crushers
B. All screens
C. All conveyor transfer points
The sprays shall operate whenever dry conditions warrant or as determined necessary by
the Executive Secretary.

17. The storage piles shall be watered to minimize generation of fugitive dusts as dry
conditions warrant or as determined necessary by the Executive Secretary. Records of
water treatment shall be kept for all periods when the plant is in operation.

Fuels

18. The owner/operator shall use #2 diesel fuel in the generator.

19. The sulfur content of any diesel fuel oil burned in off-highway equipment shall not exceed
0.50% by weight as determined by ASTM Method D-4294-89 or approved equivalent.

DAQE-AN0140500001-07
Page 6

On-highway diesel fuel shall be limited to 0.05% sulfur by weight. The sulfur content
shall be tested if directed by the Executive Secretary. Fuel supplier records shall be
available on-site for the Executive Secretary or a representative of the Executive Secretary.

Federal Limitations and Requirements

20. In addition to the requirements of this AO, all applicable provisions of 40 CFR 60, NSPS
Subpart A (General Provisions), 40 CFR 60.1 to 60.18 and Subpart OOO, 40 CFR 60.670
to 60.676 (Standards of Performance for Nonmetallic Mineral Processing Plants) apply to
this installation.

Records & Miscellaneous

21. 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
the information available to the Executive Secretary 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 the equipment
authorized by this AO shall be recorded.

22. The owner/operator shall comply with R307-150 Series. Inventories, Testing and
Monitoring.

23. The owner/operator shall comply with R307-107. General Requirements: Unavoidable
Breakdowns.

The Executive Secretary shall be notified in writing if the company is sold or changes its name.

This AO in no way releases the owner or operator from any liability for compliance with all other
applicable federal, state, and local regulations including R307.

A copy of the rules, regulations and/or attachments addressed in this AO may be obtained by contacting the
DAQ. The UAC R307 rules used by DAQ, the NOI guide, and other air quality documents and forms may
also be obtained on the Internet at the following web site:

http://www.airquality.utah.gov/

The annual emissions estimations below include point source, fugitive emissions, fugitive dust, road dust
emissions, etc. and do not include tail pipe emissions, grandfathered emissions, etc. These emissions are
for the purpose of determining the applicability of Prevention of Significant Deterioration, non-attainment
area, maintenance area, and Title V source requirements of the R307. They are not to be used for
determining compliance.

DAQE-AN0140500001-07
Page 7
The Potential To Emit (PTE) emissions for this source (the entire plant) are currently calculated at the
following values:

Pollutant Tons/yr

A. PM10 ................................................................ 5.33
B. SO2 .................................................................. 0.50
C. NOx ............................................................... 28.28
D. CO ................................................................... 6.79
E. VOC ................................................................ 0.87
HAPs………………….. ............................. 0.02

Approved By:

M. Cheryl Heying, Executive Secretary
Utah Air Quality Board
Lucia Mason <[e-mail]>
RE: Periodic Permit Updates, 14050
15 messages
Rachelle Williams <[e-mail]>
To: "[e-mail]" <[e-mail]>
Lucia
Sorry I am so late getting this information to you.. It got buried in my email this last month.

Hi Val,

The DAQ need is making customary permit updates to your approval order (DAQE-AN0140500001-07).

Please email back with the following information within the next two weeks (before 9/4).
1. According to our records, your site underwent an undocumented ownership change. The DAQ needs proof of the ownership change. This can take the form of a signature from the former owner (Snowfield Rock Products) or a document thaownership change. I've attached our standard Name/ Ownership Change Notification Form below.
I have attached the purchase agreement with Steve’s (Snowfield Rock Products) signature and also a copy of our 2024 Washington County property taxes. Hope this will work.
2. Provide the following contact information:
o Site: Val Rees [phone]
o Company: Harward & Rees 169 South Main Loa, UT 84747 – PO Box 279 Loa, UT 84747 – [phone] – [e-mail]
o Environmental contact: Val Rees - 169 South Main Loa, UT 84747 – PO Box 279 Loa, UT 84747 – [phone] – [e-mail]
o Billing contact: same as company
o Name on Approval Order: same as company
Please let me know if I can help with anything else

Rachelle Williams
169 South Main
Loa, UT 84747
[phone]
[e-mail]

From: Lucia Mason <[e-mail]>
Date: September 24, 2024 at 10:21:04 AM MDT
1/28/25, 9:40 AM State of Utah Mail - RE: Periodic Permit Updates, 14050
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-f:1815735721435325765&simpl=msg-f:1815735721435325765&simpl=msg-a:r7428848832498995031&simpl=…1/7
To: Val Rees <[e-mail]>
Subject: Re: Periodic Permit Updates, 14050
Hi Val,

I'm checking in on my previous email again. Please get back to me with a response soon.

Thanks,

Lucia

On Tue, Sep 10, 2024 at 12:20 PM Lucia Mason <[e-mail]> wrote:
Hi Val,

I'm following up on my previous email. Please get back to me with a response soon.

Thanks,

Lucia

On Wed, Aug 21, 2024 at 4:49 PM Lucia Mason <[e-mail]> wrote:
Lucia Mason <[e-mail]>
to chase
Hi Val,
The DAQ need is making customary permit updates to your approval order (DAQE-AN0140500001-07).
Please email back with the following information within the next two weeks (before 9/4).
1. According to our records, your site underwent an undocumented ownership change. The DAQ needs proof of the ownership change. This can take the form of a signature from the former owner (Snowfield Rock Produc
that provides proof of the ownership change. I've attached our standard Name/ Ownership Change Notification Form below.
1/28/25, 9:40 AM State of Utah Mail - RE: Periodic Permit Updates, 14050
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-f:1815735721435325765&simpl=msg-f:1815735721435325765&simpl=msg-a:r7428848832498995031&simpl=…2/7
2. Provide the following contact information:
o Site: physical address, phone number, and email (if applicable)
o Company: physical address, billing address, mailing address, phone number, fax number (if applicable) and email
o Environmental contact: physical address, mailing address, phone number, fax number (if applicable) and email
o Billing contact: (if different from environmental contact): physical address, phone number, fax number (if applicable) and email
o Name on Approval Order: (if different from environmental contact): physical address, mailing address, phone number, fax number (if applicable) and email
Let me know if you have any questions. Thanks for your time.
Best,
Lucia
2 attachments
scans_20241114_145732.pdf
191K
scans_20241114_150050.pdf
712K
Lucia Mason <[e-mail]>Thu, Nov 14, 2024 at 4:14 PM
To: Rachelle Williams <[e-mail]>
Thanks Rachelle. I'll reach out if the DAQ needs additional information.
[Quoted text hidden]
Lucia Mason <[e-mail]>Mon, Nov 25, 2024 at 5:33 PMTo: Rachelle Williams <[e-mail]>
Hi Rachelle,
What is the preferred company name? I've seen the company referred to as "Harward & Rees, Inc.", "Harward & Rees" and "Harward and Rees Construction."
Additionally, the DAQ currently references the aggregate pit off exit 33 on I15 as the "Snowfield Aggregate Pit." Is this the best name to use? If not, please provide a prefered site name.
Thanks,
Lucia
[Quoted text hidden]
Lucia Mason <[e-mail]>Wed, Dec 11, 2024 at 10:56 AM
To: Rachelle Williams <[e-mail]>
Hi Rachelle,
As per our conversation on the phone earlier today I'll keep all equipment listed on the current AO.
To determine the applicability of federal NSPS Subpart IIII the DAQ needs to know the manufacture date of the diesel engine listed in your current AO under Equipment ID 7.D. Could you provide the engine's date of manufacture?
Thanks,
Lucia
[Quoted text hidden]
Rachelle Williams <[e-mail]>To: Lucia Mason <[e-mail]>
Hi Lucia –
1/28/25, 9:40 AM State of Utah Mail - RE: Periodic Permit Updates, 14050
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-f:1815735721435325765&simpl=msg-f:1815735721435325765&simpl=msg-a:r7428848832498995031&simpl=…3/7
Thanks for getting us all set up again.
The diesel generator is a 2023

Rachelle
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Lucia Mason <[e-mail]>
to chase
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Lucia Mason <[e-mail]>Thu, Dec 12, 2024 at 11:17 AM
To: Rachelle Williams <[e-mail]>
Hi Rachelle,
The engine we have listed on your AO was permitted in 2007 (a 1051 hp diesel generator). If the current generator engine was manufactured in 2023 was the old engine retired? If so, could you provide the power rating of the 2023 engine?
Thanks,
Lucia
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2 attachments
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image001.jpg
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Rachelle Williams <[e-mail]>Thu, Dec 12, 2024 at 1:02 PMTo: Lucia Mason <[e-mail]>
Let me go verify the year again. I will get right back to you.
1/28/25, 9:40 AM State of Utah Mail - RE: Periodic Permit Updates, 14050
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-f:1815735721435325765&simpl=msg-f:1815735721435325765&simpl=msg-a:r7428848832498995031&simpl=…4/7
[Quoted text hidden]
Lucia Mason <[e-mail]>Thu, Dec 12, 2024 at 2:27 PM
To: Rachelle Williams <[e-mail]>
Sounds good. Thanks.
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Rachelle Williams <[e-mail]>Fri, Dec 13, 2024 at 7:19 AMTo: Lucia Mason <[e-mail]>
Lucia,I went right to the source. My guy said it is a 2021.
The 2007 must have been rented and we returned it when we purchased this generator. We only have the one.
Thank you, Rachelle Williams
Get Outlook for iOS
From: Lucia Mason <[e-mail]>
Sent: Thursday, December 12, 2024 2:27:30 PM
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Lucia Mason <[e-mail]>Fri, Dec 13, 2024 at 7:34 AM
To: Rachelle Williams <[e-mail]>
Got it, thanks. Could you provide the power rating (hp) of the 2021 engine that would be brought on site? If the new engine's hp is less than the one we currently have permitted (1,051 hp) I can switch the two out through this permit update. If the new
engine has a greater hp than the current engine Harward and Rees should submit a modification for an engine replacement.
Let me know,
Lucia
[Quoted text hidden]
Lucia Mason <[e-mail]>Thu, Dec 26, 2024 at 10:43 AM
To: Rachelle Williams <[e-mail]>
Hi Rachelle,
I'm checking in on the email I sent on December 13th. Let me know if you have any updates.
Happy holidays!
Lucia
[Quoted text hidden]
Rachelle Williams <[e-mail]>To: Lucia Mason <[e-mail]>
Generator
CAT Model XQ570BG
Serial No: ME500471

Purchase date 10/12/2023
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1/28/25, 9:40 AM State of Utah Mail - RE: Periodic Permit Updates, 14050
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-f:1815735721435325765&simpl=msg-f:1815735721435325765&simpl=msg-a:r7428848832498995031&simpl=…5/7
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Sounds good. Thanks.

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169 South Main
Loa, UT 84747
[phone]
[e-mail]

From: Lucia Mason <[e-mail]>
Date: September 24, 2024 at 10:21:04 AM MDTTo: Val Rees <[e-mail]>
Subject: Re: Periodic Permit Updates, 14050

Hi Val,

I'm checking in on my previous email again. Please get back to me with a response soon.

Thanks,

Lucia

On Tue, Sep 10, 2024 at 12:20 PM Lucia Mason <[e-mail]> wrote:
Hi Val,

I'm following up on my previous email. Please get back to me with a response soon.

Thanks,

Lucia
1/28/25, 9:40 AM State of Utah Mail - RE: Periodic Permit Updates, 14050
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-f:1815735721435325765&simpl=msg-f:1815735721435325765&simpl=msg-a:r7428848832498995031&simpl=…6/7

On Wed, Aug 21, 2024 at 4:49 PM Lucia Mason <[e-mail]> wrote:
Lucia Mason <[e-mail]>
to chase
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Lucia Mason <[e-mail]>Thu, Jan 9, 2025 at 2:02 PMTo: Rachelle Williams <[e-mail]>
Thank you. Let me know when you know the engine's hp.
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Rachelle Williams <[e-mail]>Thu, Jan 9, 2025 at 2:26 PM
To: Lucia Mason <[e-mail]>
Lucia –

John said it is model C18 with 800 HP or 570 KW

Thanks
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Lucia Mason <[e-mail]>Thu, Jan 9, 2025 at 3:25 PM
To: Rachelle Williams <[e-mail]>
Thank you.
[Quoted text hidden]
1/28/25, 9:40 AM State of Utah Mail - RE: Periodic Permit Updates, 14050
https://mail.google.com/mail/u/0/?ik=509389cc4c&view=pt&search=all&permthid=thread-f:1815735721435325765&simpl=msg-f:1815735721435325765&simpl=msg-a:r7428848832498995031&simpl=…7/7