DAQ-2024-007957

DAQE-AN161960001-24

{{$d1 }}

Mark Montgomery
Logan City Power
530 North 800 West
Logan, UT 84321
[e-mail]

Dear Mr. Montgomery:

Re: Approval Order: New Natural Gas Power Plant
Project Number: N161960001

The attached Approval Order (AO) is issued pursuant to the Notice of Intent (NOI) received on January
18, 2024. Logan City Power must comply with the requirements of this AO, all applicable state
requirements (R307), and Federal Standards.

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

Sincerely,

{{$s }}

Bryce C. Bird
Director

BCB:DA:jg

cc: Bear River Health Department

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

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

April 29, 2024

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

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

APPROVAL ORDER
DAQE-AN161960001-24
New Natural Gas Power Plant

Prepared By
Dungan Adams, Engineer
[phone]
[e-mail]

Issued to
Logan City Power - Logan Natural Gas Power Plant

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality

April 29, 2024
TABLE OF CONTENTS

TITLE/SIGNATURE PAGE ....................................................................................................... 1
GENERAL INFORMATION ...................................................................................................... 3
CONTACT/LOCATION INFORMATION ............................................................................... 3
SOURCE INFORMATION ........................................................................................................ 3
General Description ................................................................................................................ 3
NSR Classification .................................................................................................................. 3
Source Classification .............................................................................................................. 3
Applicable Federal Standards ................................................................................................. 3
Project Description.................................................................................................................. 4
SUMMARY OF EMISSIONS .................................................................................................... 4
SECTION I: GENERAL PROVISIONS .................................................................................... 4
SECTION II: PERMITTED EQUIPMENT .............................................................................. 5
SECTION II: SPECIAL PROVISIONS ..................................................................................... 5
PERMIT HISTORY ..................................................................................................................... 7
ACRONYMS ................................................................................................................................. 8

DAQE-AN161960001-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Logan City Power Logan City Power - Logan Natural Gas Power
Plant

Mailing Address Physical Address
530 North 800 West
Logan, UT 84321
Southeast Corner of West 1800 South and
South 1000 West
Logan, UT

Source Contact UTM Coordinates
Name: Mark Montgomery 428,472 m Easting
Phone: [phone],616,772 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12

SIC code 4911 (Electric Services)

SOURCE INFORMATION
General Description
Logan City Power is a utility company that has requested to operate four (4) 3,427 horsepower (hp)
(2,558 kilowatt (kW)) natural gas-fired generator engines to generate electricity for the city of Logan in
Cache County. Each generator engine will be equipped with a selective catalytic reduction (SCR) device
and an oxidation catalyst (OC). The facility is classified as a peaking power plant.

NSR Classification
New Minor Source

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

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
DAQE-AN161960001-24
Page 4

Project Description
Logan City Power is a utility company that supplies electricity to the city of Logan, in Cache County.
Logan City Power has requested to install four (4) 3,427 hp (2,558 kW) natural gas-fired generators that
will operate continuously (8,760 hours per year). The engines are equipped with SCR and OC to reduce
exhaust emissions.

SUMMARY OF EMISSIONS

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

Criteria Pollutant Change (TPY) Total (TPY)
CO2 Equivalent 54842.00
Carbon Monoxide 12.23
Nitrogen Oxides 9.27
Particulate Matter - PM10 3.49
Particulate Matter - PM2.5 3.49
Sulfur Dioxide 0.21
Volatile Organic Compounds 11.91

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Acetaldehyde (CAS #75070) 2920
Acrolein (CAS #107028) 1796
Formaldehyde (CAS #50000) 13240
Generic HAPs (CAS #GHAPS) 802
Hexane (CAS #110543) 388
Methanol (CAS #67561) 874
Change (TPY) Total (TPY)
Total HAPs 10.01

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-AN161960001-24
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 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]

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

SECTION II: PERMITTED EQUIPMENT

II.A THE APPROVED EQUIPMENT

II.A.1 Logan Natural Gas Power Plant
10.2 MW Facility

II.A.2 Four (4) Generator Engines
Model: Caterpillar G3520H
Rating: 3,427 hp (2,558 kW) each
Fuel: Natural Gas
Control: SCR and OC
NSPS/MACT Applicability: 40 CFR 60 Subpart JJJJ, 40 CFR 63 Subpart ZZZZ

SECTION II: SPECIAL PROVISIONS

II.B REQUIREMENTS AND LIMITATIONS

II.B.1 Facility-Wide Requirements
II.B.1.a The owner/operator shall not allow visible emissions from any source on site to exceed 10%
opacity. [R307-401-8]

DAQE-AN161960001-24
Page 6

II.B.1.a.1 Opacity observations of visible emissions from stationary sources shall be conducted according
to 40 CFR 60, Appendix A, Method 9. [R307-401-8]

II.B.2 Natural Gas Generator Engine Requirements
II.B.2.a The owner/operator shall equip each natural gas-fired engine with a SCR device and an OC to
control emissions. [R307-401-8]

II.B.2.b The owner/operator shall use only natural gas as fuel in all internal combustion engine
generators. [R307-401-8]

II.B.3 Stack Testing Requirements
II.B.3.a The owner/operator shall not emit more than the following rates and concentrations from each
2,558 kW Generator:

Pollutant g/hp-hr
NOx 0.07
CO 0.092
VOC 0.09

[R307-401-8]

II.B.3.a.1 Compliance Demonstration
To demonstrate compliance with the emission limitations above, the owner/operator shall
perform stack testing on the emissions unit according to the stack testing conditions contained in
this AO. [R307-165-2, R307-401-8]

II.B.3.a.2 Initial Test
The owner/operator shall conduct an initial stack test on the emission unit within 180 days after
startup of the emission unit. [R307-165-2]

II.B.3.a.3 Test Frequency
The owner/operator shall conduct a stack test on the emission unit within three (3) years after the
date of the most recent stack test of the emission unit. The Director may require the
owner/operator to perform a stack test at any time. [R307-165-2, R307-401-8]

II.B.3.b The owner/operator shall conduct any stack testing required by this AO according to the
following conditions. [R307-401-8]

II.B.3.b.1 Notification
At least 30 days prior to conducting a stack test, the owner/operator shall submit a source test
protocol to the Director. The source test protocol shall include the items contained in
R307-165-3. If directed by the Director, the owner/operator shall attend a pretest conference.
[R307-165-3, R307-401-8]

II.B.3.b.2 Testing & Test Conditions
The owner/operator shall conduct testing according to the approved source test protocol and
according to the test conditions contained in R307-165-4. [R307-165-4, R307-401-8]

II.B.3.b.3 Access
The owner/operator shall provide Occupational Safety and Health Administration (OSHA)- or
Mine Safety and Health Administration (MSHA)-approved access to the test location.
[R307-401-8]

II.B.3.b.4 Reporting
No later than 60 days after completing a stack test, the owner/operator shall submit a written
report of the results from the stack testing to the Director. The report shall include validated
results and supporting information. [R307-165-5, R307-401-8]

DAQE-AN161960001-24
Page 7

II.B.3.b.5 Possible Rejection of Test Results
The Director may reject stack testing results if the test did not follow the approved source test
protocol or for a reason specified in R307-165-6. [R307-165-6, R307-401-8]

II.B.3.b.6 Test Methods
When performing stack testing, the owner/operator shall use the appropriate EPA-approved test
methods as acceptable to the Director. Acceptable test methods for pollutants are listed below.
[R307-401-8]

II.B.3.c Standard Conditions

A. Temperature - 68 degrees Fahrenheit (293 K).

B. Pressure - 29.92 in Hg (101.3 kPa).

C. Averaging Time - As specified in the applicable test method.

[40 CFR 60 Subpart A, 40 CFR 63 Subpart A, R307-401-8]

II.B.3.c.1 NOx
40 CFR 60, Appendix A, Method 7; Method 7E; or other EPA-approved testing method as
acceptable to the Director. [R307-401-8]

II.B.3.c.2 VOC
40 CFR 60, Appendix A, Method 18; Method 25; Method 25A; 40 CFR 63, Appendix A,
Method 320; or other EPA-approved testing method as acceptable to the Director.
[R307-401-8]

II.B.3.c.3 CO
40 CFR 60, Appendix A, Method 10 or other EPA-approved testing method as acceptable to the
Director. [R307-401-8]

PERMIT HISTORY

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

Is Derived From NOI dated January 18, 2024
Incorporates Additional Information dated February 15, 2024

DAQE-AN161960001-24
Page 8

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-IN161960001-24

March 21, 2024

Mark Montgomery
Logan City Power
530 North 800 West
Logan, UT 84321
[e-mail]

Dear Mr. Montgomery:

Re: Intent to Approve: New Natural Gas Power Plant
Project Number: N161960001

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

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

Sincerely,

{{$s }}

Alan D. Humpherys, Manager
New Source Review Section

ADH:DA:jg

cc: Bear River Health Department

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

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

STATE OF UTAH
Department of Environmental Quality
Division of Air Quality

INTENT TO APPROVE
DAQE-IN161960001-24
New Natural Gas Power Plant

Prepared By
Dungan Adams, Engineer
[phone]
[e-mail]

Issued to
Logan City Power - Logan Natural Gas Power Plant

Issued On
March 21, 2024

{{$s }}

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

TABLE OF CONTENTS

TITLE/SIGNATURE PAGE ....................................................................................................... 1
GENERAL INFORMATION ...................................................................................................... 3
CONTACT/LOCATION INFORMATION ............................................................................... 3
SOURCE INFORMATION ........................................................................................................ 3
General Description ................................................................................................................ 3
NSR Classification .................................................................................................................. 3
Source Classification .............................................................................................................. 3
Applicable Federal Standards ................................................................................................. 3
Project Description.................................................................................................................. 4
SUMMARY OF EMISSIONS .................................................................................................... 4
PUBLIC NOTICE STATEMENT............................................................................................... 4
SECTION I: GENERAL PROVISIONS .................................................................................... 5
SECTION II: PERMITTED EQUIPMENT .............................................................................. 5
SECTION II: SPECIAL PROVISIONS ..................................................................................... 6
PERMIT HISTORY ..................................................................................................................... 8
ACRONYMS ................................................................................................................................. 9

DAQE-IN161960001-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Logan City Power Logan City Power - Logan Natural Gas Power
Plant

Mailing Address Physical Address
530 North 800 West
Logan, UT 84321
Southeast Corner of West 1800 South and South
1000 West
Logan, UT

Source Contact UTM Coordinates
Name: Mark Montgomery 428,472 m Easting
Phone: [phone],616,772 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12

SIC code 4911 (Electric Services)

SOURCE INFORMATION
General Description
Logan City Power is a utility company that has requested to operate four (4) 3,427 horsepower (hp)
(2,558 kilowatt (kW)) natural gas-fired generator engines to generate electricity for the city of Logan in
Cache County. Each generator engine will be equipped with a selective catalytic reduction (SCR) device
and an oxidation catalyst (OC). The facility is classified as a peaking power plant.
NSR Classification
New Minor Source

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

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
DAQE-IN161960001-24
Page 4

Project Description
Logan City Power is a utility company that supplies electricity to the city of Logan, in Cache County.
Logan City Power has requested to install four (4) 3,427 hp (2,558 kW) natural gas-fired generators that
will operate continuously (8,760 hours per year). The engines are equipped with Selective Catalytic
Reduction (SCR) and Oxidation Catalyst (OC) to reduce exhaust emissions.

SUMMARY OF EMISSIONS

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

Criteria Pollutant Change (TPY) Total (TPY)
CO2 Equivalent 54842.00
Carbon Monoxide 12.23
Nitrogen Oxides 9.27
Particulate Matter - PM10 3.49
Particulate Matter - PM2.5 3.49
Sulfur Dioxide 0.21
Volatile Organic Compounds 11.91

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Acetaldehyde (CAS #75070) 2920
Acrolein (CAS #107028) 1796
Formaldehyde (CAS #50000) 13240
Generic HAPs (CAS #GHAPS) 802
Hexane (CAS #110543) 388
Methanol (CAS #67561) 874
Change (TPY) Total (TPY)
Total HAPs 10.01

PUBLIC NOTICE STATEMENT

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

A 30-day public comment period will be held in accordance with UAC R307-401-7. A notification of the
intent to approve will be published in The Herald Journal on March 23, 2024. During the public
comment period the proposal and the evaluation of its impact on air quality will be available for the
public to review and provide comment. If anyone so requests a public hearing within 15 days of
publication, it will be held in accordance with UAC R307-401-7. The hearing will be held as close as
practicable to the location of the source. Any comments received during the public comment period and
the hearing will be evaluated. The proposed conditions of the AO may be changed as a result of the
comments received.

DAQE-IN161960001-24
Page 5

SECTION I: GENERAL PROVISIONS

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

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

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

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

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

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

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

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

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

SECTION II: PERMITTED EQUIPMENT

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

II.A THE APPROVED EQUIPMENT

II.A.1 Logan Natural Gas Power Plant
10.2 MW Facility

DAQE-IN161960001-24
Page 6

II.A.2 Four (4) Generator Engines
Model: Caterpillar G3520H
Rating: 3,427 hp (2,558 kW) each
Fuel: Natural Gas
Control: Selective Catalytic Reduction (SCR) and Oxidation Catalyst (OC)
NSPS/MACT Applicability: 40 CFR 60 Subpart JJJJ, 40 CFR 63 Subpart ZZZZ

SECTION II: SPECIAL PROVISIONS

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

II.B REQUIREMENTS AND LIMITATIONS

II.B.1 Facility-Wide Requirements
II.B.1.a The owner/operator shall not allow visible emissions from any source on site to exceed 10%
opacity. [R307-401-8]

II.B.1.a.1 Opacity observations of visible emissions from stationary sources shall be conducted according
to 40 CFR 60, Appendix A, Method 9. [R307-401-8]

II.B.2 Natural Gas Generator Engine Requirements
II.B.2.a The owner/operator shall equip each natural gas-fired engine with a selective catalytic reduction
(SCR) device and an oxidation catalyst (OC) to control emissions. [R307-401-8]

II.B.2.b The owner/operator shall use only natural gas as fuel in all internal combustion engine
generators. [R307-401-8]

II.B.3 Stack Testing Requirements
II.B.3.a The owner/operator shall not emit more than the following rates and concentrations from each
2,558 kW Generator:

Pollutant g/hp-hr
NOx 0.07
CO 0.092
VOC 0.09

[R307-401-8]

II.B.3.a.1 Compliance Demonstration
To demonstrate compliance with the emission limitations above, the owner/operator shall
perform stack testing on the emissions unit according to the stack testing conditions contained in
this AO. [R307-165-2, R307-401-8]

II.B.3.a.2 Initial Test
The owner/operator shall conduct an initial stack test on the emission unit within 180 days after
startup of the emission unit. [R307-165-2]

II.B.3.a.3 Test Frequency
The owner/operator shall conduct a stack test on the emission unit within three (3) years after the
date of the most recent stack test of the emission unit. The Director may require the
owner/operator to perform a stack test at any time. [R307-165-2, R307-401-8]

DAQE-IN161960001-24
Page 7

II.B.3.b The owner/operator shall conduct any stack testing required by this AO according to the
following conditions. [R307-401-8]

II.B.3.b.1 Notification
At least 30 days prior to conducting a stack test, the owner/operator shall submit a source test
protocol to the Director. The source test protocol shall include the items contained in
R307-165-3. If directed by the Director, the owner/operator shall attend a pretest conference.
[R307-165-3, R307-401-8]

II.B.3.b.2 Testing & Test Conditions
The owner/operator shall conduct testing according to the approved source test protocol and
according to the test conditions contained in R307-165-4. [R307-165-4, R307-401-8]

II.B.3.b.3 Access
The owner/operator shall provide Occupational Safety and Health Administration (OSHA)- or
Mine Safety and Health Administration (MSHA)-approved access to the test location.
[R307-401-8]

II.B.3.b.4 Reporting
No later than 60 days after completing a stack test, the owner/operator shall submit a written
report of the results from the stack testing to the Director. The report shall include validated
results and supporting information. [R307-165-5, R307-401-8]

II.B.3.b.5 Possible Rejection of Test Results
The Director may reject stack testing results if the test did not follow the approved source test
protocol or for a reason specified in R307-165-6. [R307-165-6, R307-401-8]

II.B.3.b.6 Test Methods
When performing stack testing, the owner/operator shall use the appropriate EPA-approved test
methods as acceptable to the Director. Acceptable test methods for pollutants are listed below.
[R307-401-8]

II.B.3.c Standard Conditions

A. Temperature - 68 degrees Fahrenheit (293 K).

B. Pressure - 29.92 in Hg (101.3 kPa).

C. Averaging Time - As specified in the applicable test method.

[40 CFR 60 Subpart A, 40 CFR 63 Subpart A, R307-401-8]

II.B.3.c.1 NOx
40 CFR 60, Appendix A, Method 7; Method 7E; or other EPA-approved testing method as
acceptable to the Director. [R307-401-8]

II.B.3.c.2 VOC
40 CFR 60, Appendix A, Method 18; Method 25; Method 25A; 40 CFR 63, Appendix A,
Method 320; or other EPA-approved testing method as acceptable to the Director. [R307-401-8]

II.B.3.c.3 CO
40 CFR 60, Appendix A, Method 10 or other EPA-approved testing method as acceptable to the
Director. [R307-401-8]

DAQE-IN161960001-24
Page 8

PERMIT HISTORY

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

Is Derived From NOI dated January 18, 2024
Incorporates Additional Information dated February 15, 2024

DAQE-IN161960001-24
Page 9

ACRONYMS

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

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

494055
APG West Payment
Processing
PO Box 1570
Pocatello, ID 83204
Ph. 435-514-1830
ADVERTISING INVOICE
Discount: $0.00
Surcharge: $0.00
Credits: $0.00
We Appreciate Your Business!
Gross:$98.22
Paid Amount:$0.00
Amount Due:$98.22
Payments:
Date Method Card Type Last 4 Digits Check Amount
LINDA GOULDUTAH STATE DEPT. OF ENVIRONMENTAL QUALIT P.O. BOX 144820 SALT LAKE CITY, UT 84114
BILLING DATE: ACCOUNT NO:
03/21/24 5350
AD #DESCRIPTION START STOP TIMES AMOUNT
03/23/24 03/23/24 2 $98.22NOTICE A Notice of I494055
AD# 494055AD#
NOTICE
A Notice of Intent for the following project submitted in accor-
dance with R307-401-1, Utah Administrative Code (UAC), has
been received for consideration by the Director:
Company Name: Logan City PowerLocation: Logan City Power - Logan Natural Gas Power Plant
– Southeast Corner of West 1800 South and South 1000 West,
Logan, UTProject Description: Logan City Power is a utility company
that supplies electricity to the city of Logan, in Cache County.
Logan City Power has requested to install four (4) 3,427 hp
(2,558 kW) natural gas-fired generators that will operate con-
tinuously (8,760 hours per year). The facility is classified as a
peaking power plant. The engines are equipped with Selective
Catalytic Reduction (SCR) and Oxidation Catalyst (OC) to re-
duce exhaust emissions.
The completed engineering evaluation and air quality impact
analysis showed the proposed project meets the requirements
of federal air quality regulations and the State air quality rules.
The Director intends to issue an Approval Order pending a 30-
day public comment period. The project proposal, estimate of
the effect on local air quality, and draft Approval Order are avail-
able for public inspection and comment at the Utah Division of
Air Quality, 195 North 1950 West, Salt Lake City, UT 84116.
Written comments received by the Division at this same ad-
dress on or before April 22, 2024, will be considered in making
the final decision on the approval/disapproval of the proposed
project. Email comments will also be accepted at dunganad-
[e-mail]. If anyone so requests to the Director in writing
within 15 days of publication of this notice, a hearing will be held
in accordance with R307-401-7, UAC.
Under Section 19-1-301.5, a person who wishes to challenge
a Permit Order may only raise an issue or argument during an
adjudicatory proceeding that was raised during the public com-
ment period and was supported with sufficient information or
documentation to enable the Director to fully consider the sub-
stance and significance of the issue.Published: March 23rd, 2024 (HJ5350-494055)

DAQE-NN161960001-24

March 21, 2024

The Herald Journal
Legal Advertising Dept
1068 W 130 S
Logan, UT 84321

RE: Legal Notice of Intent to Approve

This letter will confirm the authorization to publish the attached NOTICE in The Herald Journal on
March 23, 2024.

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

Sincerely,

{{$s }}

Jeree Greenwood
Office Technician

Enclosure

cc: Bear River Association of Governments
cc: Cache County

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

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

DAQE-NN161960001-24
Page 2
NOTICE

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

Company Name: Logan City Power
Location: Logan City Power - Logan Natural Gas Power Plant – Southeast Corner of West
1800 South and South 1000 West, Logan, UT
Project Description: Logan City Power is a utility company that supplies electricity to the city of
Logan, in Cache County. Logan City Power has requested to install four (4)
3,427 hp (2,558 kW) natural gas-fired generators that will operate continuously
(8,760 hours per year). The facility is classified as a peaking power plant. The
engines are equipped with Selective Catalytic Reduction (SCR) and Oxidation
Catalyst (OC) to reduce exhaust emissions.

The completed engineering evaluation and air quality impact analysis showed the proposed project meets
the requirements of federal air quality regulations and the State air quality rules. The Director intends to
issue an Approval Order pending a 30-day public comment period. The project proposal, estimate of the
effect on local air quality, and draft Approval Order are available for public inspection and comment at
the Utah Division of Air Quality, 195 North 1950 West, Salt Lake City, UT 84116. Written comments
received by the Division at this same address on or before April 22, 2024, will be considered in making
the final decision on the approval/disapproval of the proposed project. Email comments will also be
accepted at [e-mail]. If anyone so requests to the Director in writing within 15 days of
publication of this notice, a hearing will be held in accordance with
R307-401-7, UAC.

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

Date of Notice: March 23, 2024

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

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 1
UTAH DIVISION OF AIR QUALITY
ENGINEER REVIEW

SOURCE INFORMATION

Project Number N161960001
Owner Name Logan City Power
Mailing Address 530 North 800 West
Logan, UT, 84321

Source Name Logan City Power- Logan Natural Gas Power Plant
Source Location Southeast Corner of W 1800 S and S 1000 W
Logan, UT

UTM Projection 428,472 m Easting, 4,616,772 m Northing
UTM Datum NAD83
UTM Zone UTM Zone 12
SIC Code 4911 (Electric Services)

Source Contact Mark Montgomery
Phone Number [phone]
Email [e-mail]

Billing Contact Mark Montgomery
Phone Number [phone]
Email [e-mail]

Project Engineer Dungan Adams, Engineer
Phone Number [phone]
Email [e-mail]

Notice of Intent (NOI) Submitted January 18, 2024
Date of Accepted Application February 21, 2024

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 2
SOURCE DESCRIPTION

General Description
Logan City Power is a utility company that has requested to operate 4 (four) 3,427 horsepower
(hp) (2,558 kilowatt (kW)) natural gas-fired generator engines to generate electricity for the city
of Logan, in Cache County. Each generator engine will be equipped with a selective catalytic
reduction (SCR) device and an oxidation catalyst (OC). The facility is classified as a peaking
power plant.

NSR Classification:
New Minor Source

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

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), JJJJ: Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines

Project Proposal
New Natural Gas Power Plant

Project Description
Logan City Power is a utility company that supplies electricity to the city of Logan, in Cache
County. Logan City Power has requested to install four (4) 3,427 hp (2,558 kW) natural gas-fired
generators which will operate continuously (8,760 hours per year). The engines are equipped with
Selective Catalytic Reduction (SCR) and Oxidation Catalyst (OC) to reduce exhaust emissions.

EMISSION IMPACT ANALYSIS
The source's criteria pollutant emission increases do not trigger the requirement for Logan City Power to
conduct modeling for NOx under Utah Administrative Code R307-410-4. However, the source has elected to
model for NO2 to demonstrate compliance with the NAAQS. The source is exempt from modeling for
Hazardous Air Pollutants outlined in R307-410-5 because the source is subject to a MACT standard for HAP
emissions.

The UDAQ conducted l-hour NO2 modeling analysis. The results indicate the highest NO2 impact would be
93.51% of the NAAQS levels. No additional conditions or limitations are recommended. See Modeling
Memorandum DAQE-MN161960001-24, dated February 7, 2024, for additional details. [Last updated March
11, 2024]

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 3
SUMMARY OF EMISSIONS

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

Criteria Pollutant Change (TPY) Total (TPY)
CO2 Equivalent 54842.00
Carbon Monoxide 12.23
Nitrogen Oxides 9.27
Particulate Matter - PM10 3.49
Particulate Matter - PM2.5 3.49
Sulfur Dioxide 0.21
Volatile Organic Compounds 11.91

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Acetaldehyde (CAS #75070) 2920
Acrolein (CAS #107028) 1796
Formaldehyde (CAS #50000) 13240
Generic HAPs (CAS #GHAPS) 802
Hexane (CAS #110543) 388
Methanol (CAS #67561) 874
Change (TPY) Total (TPY)
Total HAPs 10.01

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

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 4
Review of BACT for New/Modified Emission Units

1. BACT review regarding Four (4) New Natural Gas-Fired Engines
Logan City Power has proposed to install four (4) Caterpillar G3520H 4-stroke lean-burn engines
that will be rated at 2,558 kW (3,427 hp) each.

Nitrogen Oxides (NOx)
NOx emissions from natural gas-fired engines occurs primarily through the formation of thermal
NOx. Thermal NOx is created by the thermal dissociation and subsequent reaction of nitrogen (N2)
and oxygen (O2) molecules in the combustion air. Factors affecting the generation of NOx include
flame temperature, residence time, quantity of excess air, and nitrogen content of the fuel.

Available pre-combustion controls include air-to-fuel ratio control and ignition system controls.
According to EPA AP-42, Vol. I, 3.2 (Natural Gas-fired Reciprocating Engines), available post-
combustion catalytic technologies include selective catalytic reduction (SCR) for lean-burn
engines and nonselective catalytic reduction (NSCR) for rich-burn engines. All engines will be
lean-burn engines. Therefore, only use of SCR was considered.

The SCR process is based on chemical reduction of the NOx molecule. A nitrogen-based reducing
agent (reagent), such as ammonia or urea, is injected into the post combustion flue gas. The
reagent reacts selectively with the flue gas NOx within a specific temperature range and in the
presence of the catalyst and oxygen to reduce the NOx to molecular nitrogen (N2) and water vapor
(H2 O). SCR catalysts are composed of active metals or ceramics with a highly porous structure.
Within the pores of the catalyst are activated sites. These sites have an acid group on the end of the
compound structure where the reduction reaction occurs. Control for an SCR system is typically
70-90% reduction of NOx.

The proposed engines will be equipped with an SCR. As per manufacturer's specifications, the
SCR system will limit NOx emission rates to 0.07 g/bhp-hr in each engine. This emission rate is
below the limit of 1.0 g/hp-hr of NOx specified in 40 CFR 60 Subpart JJJJ. DAQ is unaware of any
other add-on control technologies that can further reduce NOx emissions and agrees that this
emission rate is considered BACT for the proposed engines.

Carbon Monoxide (CO)
CO emissions from natural gas combustion occur due to incomplete combustion. CO is generated
when there is insufficient time at high temperature to complete the final step in hydrocarbon
oxidation.

Available pre-combustion modifications include air-to-fuel ratio control and ignition system
controls. Available post-combustion control options for CO emissions include SCR and oxidation
catalysts. Oxidation catalysts are best suited for lean burn engines and were therefore considered
for controlling CO emissions.

Catalytic oxidation is a control technology which employs a module containing an oxidation
catalyst that is located in the exhaust path of the burner system. In the catalyst module, CO diffuses
through the surfaces of a ceramic honeycomb structure coated with noble metal catalyst particles.
Oxidation reactions on the catalyst surface forms carbon dioxide and water. Vendor indications are
that 93% reduction in CO emissions can be achieved based on the engine's exhaust temperature.

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 5

Therefore, the proposed engines will each be equipped with an oxidation catalyst. As per
manufacturer's specifications, the oxidation catalyst system will limit CO emission rates to 0.092
g/hp-hr in each engine. These emission rates are below the limit of 2.0 g/hp-hr specified in 40 CFR
60 Subpart JJJJ. DAQ is unaware of any other add-on control technologies that can further reduce
CO emissions and agrees that these emission rates are considered BACT for the proposed natural
gas-fired engines.
[Last updated March 12, 2024]

2. BACT review regarding Four (4) New Natural Gas-Fired Engines (Continued)
VOCs/HAPs
VOC emissions from natural gas combustion also occur due to incomplete combustion and can be
controlled by the oxidation catalysts. The oxidation catalysts for the proposed engines are
anticipated to reduce VOC concentrations by approximately 50%. As per manufacturer's
specifications, the VOCs emission rates will be limited to 0.09 g/bhp-hr in each engine. These
emission rates are below the limit of 0.7 g/hp-hr specified in 40 CFR 60 Subpart JJJJ.

Many HAP components are emitted through the same process as VOCs and the control
technologies for VOCs also control HAPs. Formaldehyde is the predominant HAP component
emitted from natural gas combustion. The oxidation catalysts for the proposed engines are
anticipated to reduce Formaldehyde concentrations by approximately 75%. Formaldehyde and
other HAPs emissions will be controlled by the SCR and oxidation catalyst systems for the
proposed engines. This is considered BACT.

DAQ is unaware of any other add-on control technologies that can further reduce VOCs/HAPs
emissions and agrees that the above-mentioned emission rates are considered BACT for the
proposed engines.

Particulates (PM10 /PM2.5)
The combustion of natural gas in the engines will result in minor PM10 /PM2.5 emissions. NSPS 40
CFR 60 Subpart JJJJ does not set PM emission limits for these types of engines. Available control
options for PM emissions include conducting proper maintenance and good combustion practices.

Therefore, BACT to control particulate emissions from the natural gas-fired is best operating
practices

Sulfur Dioxide (SO2)
Sulfur dioxide emissions are a result of sulfur present in the natural gas. The only economic
control option identified for reducing SO2 is the use of good combustion practices.

BACT Determination
Based on information provided above, DAQ recommends the following measures as BACT
for the natural gas-fired engines:

1. Use of selective catalytic reduction (SCR) technology and an oxidation catalyst (OC) with
air/fuel ratio and lean burn design.
2. Limit exhaust concentrations, in g/bhp-hr, in the 2,558 kW (3,427 hp) engines to 0.07 of
NOx, 0.092 of CO, and 0.09 of VOCs.
3. Conduct manufacturer recommended maintenance and testing.
4. Limit visible emissions to 10% opacity.

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 6
[Last updated March 12, 2024]

SECTION I: GENERAL PROVISIONS

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

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

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

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

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

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

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

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

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

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 7

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
Logan Natural Gas Power Plant
10.2 MW Facility

II.A.2
NEW
Four (4) Generator Engines
Model: Caterpillar G3520H
Rating: 3,427 hp (2,558 kW) each
Fuel: Natural Gas
Control: Selective Catalytic Reduction (SCR) and Oxidation Catalyst (OC)
NSPS/MACT Applicability: 40 CFR 60 Subpart JJJJ, 40 CFR 63 Subpart ZZZZ

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
Facility-Wide Requirements
II.B.1.a
NEW
The owner/operator shall not allow visible emissions from any source on site to exceed 10%
opacity. [R307-401-8]

II.B.1.a.1
NEW
Opacity observations of visible emissions from stationary sources shall be conducted
according to 40 CFR 60, Appendix A, Method 9. [R307-401-8]

II.B.2
NEW
Natural Gas Generator Engine Requirements
II.B.2.a
NEW
The owner/operator shall equip each natural gas-fired engine with a selective catalytic
reduction (SCR) device and an oxidation catalyst (OC) to control emissions. [R307-401-8]

II.B.2.b
NEW
The owner/operator shall use only natural gas as fuel in all internal combustion engine
generators. [R307-401-8]

II.B.3
NEW
Stack Testing Requirements

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 8
II.B.3.a
NEW
The owner/operator shall not emit more than the following rates and concentrations from each
2,558 kW Generator:

Pollutant g/hp-hr
NOx 0.07
CO 0.092
VOC 0.09. [R307-401-8]

II.B.3.a.1
NEW
Compliance Demonstration
To demonstrate compliance with the emission limitations above, the owner/operator shall
perform stack testing on the emissions unit according to the stack testing conditions contained
in this AO. [R307-165-2, R307-401-8]

II.B.3.a.2
NEW
Initial Test
The owner/operator shall conduct an initial stack test on the emission unit within 180 days
after startup of the emission unit. [R307-165-2]

II.B.3.a.3
NEW
Test Frequency
The owner/operator shall conduct a stack test on the emission unit within three (3) years after
the date of the most recent stack test of the emission unit. The Director may require the
owner/operator to perform a stack test at any time. [R307-165-2, R307-401-8]

II.B.3.b
NEW
The owner/operator shall conduct any stack testing required by this AO according to the
following conditions. [R307-401-8]

II.B.3.b.1
NEW
Notification
At least 30 days prior to conducting a stack test, the owner/operator shall submit a source test
protocol to the Director. The source test protocol shall include the items contained in
R307-165-3. If directed by the Director, the owner/operator shall attend a pretest conference.
[R307-165-3, R307-401-8]

II.B.3.b.2
NEW
Testing & Test Conditions
The owner/operator shall conduct testing according to the approved source test protocol and
according to the test conditions contained in R307-165-4. [R307-165-4, R307-401-8]

II.B.3.b.3
NEW
Access
The owner/operator shall provide Occupational Safety and Health Administration (OSHA)- or
Mine Safety and Health Administration (MSHA)-approved access to the test location.
[R307-401-8]

II.B.3.b.4
NEW
Reporting
No later than 60 days after completing a stack test, the owner/operator shall submit a written
report of the results from the stack testing to the Director. The report shall include validated
results and supporting information. [R307-165-5, R307-401-8]

II.B.3.b.5
NEW
Possible Rejection of Test Results
The Director may reject stack testing results if the test did not follow the approved source test
protocol or for a reason specified in R307-165-6. [R307-165-6, R307-401-8]

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 9
II.B.3.b.6
NEW
Test Methods
When performing stack testing, the owner/operator shall use the appropriate EPA-approved
test methods as acceptable to the Director. Acceptable test methods for pollutants are listed
below. [R307-401-8]

II.B.3.c
NEW
Standard Conditions

A. Temperature - 68 degrees Fahrenheit (293 K)

B. Pressure - 29.92 in Hg (101.3 kPa)

C. Averaging Time - As specified in the applicable test method

[40 CFR 60 Subpart A, 40 CFR 63 Subpart A, R307-401-8]

II.B.3.c.1
NEW
NOx
40 CFR 60, Appendix A, Method 7; Method 7E; or other EPA-approved testing method as
acceptable to the Director. [R307-401-8]

II.B.3.c.2
NEW
VOC
40 CFR 60, Appendix A, Method 18; Method 25; Method 25A; 40 CFR 63, Appendix A,
Method 320; or other EPA-approved testing method as acceptable to the Director.
[R307-401-8]

II.B.3.c.3
NEW
CO
40 CFR 60, Appendix A, Method 10 or other EPA-approved testing method as acceptable to
the Director. [R307-401-8]

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 10
PERMIT HISTORY

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

Is Derived From NOI dated January 18, 2024
Incorporates Additional Information dated February 15, 2024

REVIEWER COMMENTS

1. Comment regarding Source Emission Estimates:
Emission estimates are based on manufacturer data and EPA guidance as published in Compilation
of Air Pollution Emission Factors, Volume I: Stationary Point and Area Sources or AP-42, Section
3.2, Natural Gas-fired Reciprocating Engines Tables 3.2-1, 3.2-2, and 3.2-3.

The manufacturer provided a NOx emission concentration of 1.0 g/hp-hr at the catalyst inlet and
guaranteed a NOx emission concentration of 0.07 g/hp-hr at the catalyst outlet.

The manufacturer provided a CO emission concentration of 1.32 g/hp-hr at the catalyst inlet. The
catalyst results in a 93% reduction in CO emissions, resulting in a CO emission concentration of
0.092 g/hp-hr at the catalyst outlet.

The manufacturer provided a VOC emission concentration of 0.18 g/hp-hr at the catalyst inlet. The
catalyst results in a 50% reduction of VOC emissions, resulting in a VOC emission concentration of
0.09 g/hp-hr at the catalyst outlet.

The manufacturer provided a Formaldehyde emission concentration of 0.20 g/hp-hr at the catalyst
inlet. The catalyst results in a 75% reduction of Formaldehyde emissions, resulting in a
Formaldehyde emission concentration of 0.05 g/hp-hr at the catalyst outlet.

Each engine is assumed to run 8,760 hours per year.
[Last updated March 12, 2024]

2. Comment regarding Federal Subpart Applicability:
NSPS
40 CFR 60 Subpart JJJJ (Standards of Performance for Stationary Spark Ignition Internal
Combustion Engines) applies to engines that were ordered after June 12, 2006, and manufactured on
or after July 1, 2007, for engines with maximum power greater than or equal to 500 hp (§60.4230(a)
(4)(i)). Thus, NSPS Subpart JJJJ applies to the Logan City Power Plant as the four (4) 2.56 MW
(3,427 hp) generator engines were ordered after June 12, 2006, and manufactured after July 1, 2007.

MACT
40 CFR 63 Subpart ZZZZ (National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines) is applicable to owners/operators of
stationary RICE at a major or area sources of HAP emissions. MACT Subpart ZZZZ applies to the
Logan City Power Plant as the engine generators are new RICE. Thus, MACT Subpart ZZZZ applies
to the source as the Logan City Power Plant is an area source of HAP emissions. The generator
engines will meet 40 CFR 63 Subpart ZZZZ by meeting 40 CFR Part 60, Subpart JJJJ. [Last updated
February 23, 2024]

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 11
3. Comment regarding Title V Applicability:
Title V of the 1990 Clean Air Act (Title V) applies to the following:

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

This facility is not a Title IV source or a major source. The facility is not subject to 40 CFR 61
(NESHAP) regulations. The facility is subject to 40 CFR 60 (NSPS) Subpart JJJJ and to 40 CFR 63
(MACT) Subpart ZZZZ. NSPS Subpart JJJJ and MACT Subpart ZZZZ each specifically except
sources from the requirement to obtain a Title V permit provided that the source is not required to
obtain the permit for any other reason. No such reasons exist for this source. Therefore, Title V does
not apply to the source. [Last updated February 23, 2024]

Engineer Review N161960001: Logan City Power- Logan Natural Gas Power Plant
March 12, 2024
Page 12
ACRONYMS
The following lists commonly used acronyms and associated translations as they apply to this
document:
40 CFR Title 40 of the Code of Federal Regulations
AO Approval Order
BACT Best Available Control Technology
CAA Clean Air Act
CAAA Clean Air Act Amendments
CDS Classification Data System (used by EPA to classify sources by size/type)
CEM Continuous emissions monitor
CEMS Continuous emissions monitoring system
CFR Code of Federal Regulations
CMS Continuous monitoring system
CO Carbon monoxide
CO2 Carbon Dioxide
CO2e Carbon Dioxide Equivalent - 40 CFR Part 98, Subpart A, Table A-1
COM Continuous opacity monitor
DAQ/UDAQ Division of Air Quality
DAQE This is a document tracking code for internal UDAQ use
EPA Environmental Protection Agency
FDCP Fugitive dust control plan
GHG Greenhouse Gas(es) - 40 CFR 52.21 (b)(49)(i)
GWP Global Warming Potential - 40 CFR Part 86.1818-12(a)
HAP or HAPs Hazardous air pollutant(s)
ITA Intent to Approve
LB/HR Pounds per hour
LB/YR Pounds per year
MACT Maximum Achievable Control Technology
MMBTU Million British Thermal Units
NAA Nonattainment Area
NAAQS National Ambient Air Quality Standards
NESHAP National Emission Standards for Hazardous Air Pollutants
NOI Notice of Intent
NOx Oxides of nitrogen
NSPS New Source Performance Standard
NSR New Source Review
PM10 Particulate matter less than 10 microns in size
PM2.5 Particulate matter less than 2.5 microns in size
PSD Prevention of Significant Deterioration
PTE Potential to Emit
R307 Rules Series 307
R307-401 Rules Series 307 - Section 401
SO2 Sulfur dioxide
Title IV Title IV of the Clean Air Act
Title V Title V of the Clean Air Act
TPY Tons per year
UAC Utah Administrative Code
VOC Volatile organic compounds

DAQE-MN161960001-24

M E M O R A N D U M

TO: Dungan Adams, NSR Engineer

FROM: Jason Krebs, Air Quality Modeler

DATE: February 7, 2024

SUBJECT: Modeling Analysis Review for the Notice of Intent for Logan City Power – Logan
Natural Gas Power Plant, Cache County, Utah
_____________________________________________________________________________________
This is not a Major Prevention of Significant Deterioration (PSD) Source.

I. OBJECTIVE
Logan City Power (Applicant) is seeking an approval order for their Logan Natural Gas Power
Plant located in Cache County, Utah.

This report, prepared by the Staff of the New Source Review Section (NSR), contains a review of
the air quality impact analysis (AQIA) including the information, data, assumptions and modeling
results used to determine if the facility will be in compliance with applicable State and Federal
concentration standards.

II. APPLICABLE RULE(S)

Utah Air Quality Rules:

R307-401-6 Condition for Issuing an Approval Order
R307-410-3 Use of Dispersion Models
R307-410-4 Modeling of Criteria Pollutants in Attainment Areas

III. MODELING METHODOLOGY

A. Applicability

Emissions from the facility include PM10, NOx, CO, SO2, and HAPs. This modeling is part of a
new approval order. The emission rates for NOx triggered the requirement to model under
R307-410. Modeling was performed by the Applicant.

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

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

JK
DAQE- MN161960001-24
Page 2
B. Assumptions

1. Topography/Terrain

The Plant is at an elevation 4480 feet with terrain features that have an affect on
concentration predictions.

a. Zone: 12

b. Approximate Location:

UTM (NAD83): 428462 meters East
4616796 meters North

2. Urban or Rural Area Designation

After a review of the appropriate 7.5 minute quadrangles, it was concluded the area is
“rural” for air modeling purposes.

3. Ambient Air

It was determined the Plant boundary used in the AQIA meets the State’s definition of
ambient air.

4. Building Downwash

The source was modeled with the AERMOD model. All structures at the plant were used in
the model to account for their influence on downwash.

5. Meteorology

Five (5) years of off-site surface and upper air data were used in the analysis consisting of
the following:

Surface – Logan-Cache Airport, UT NWS: 2016 - 2020
Upper Air – Salt Lake Airport, UT NWS: 2016 - 2020

6. Background

The background concentrations were based on concentrations measured in Logan-
Smithfield, Utah.

7. Receptor and Terrain Elevations

The modeling domain used by the Applicant consisted of receptors including property
boundary receptors. This area of the state contains mountainous terrain and the modeling
domain has simple and complex terrain features in the near and far fields. Therefore,
receptor points representing actual terrain elevations from the area were used in the
analysis.

DAQE- MN161960001-24
Page 3
8. Model and Options

The State-accepted AERMOD model was used to predict air pollutant concentrations under
a simple/complex terrain/wake effect situation. In quantifying concentrations, the
regulatory default option was selected.

9. Air Pollutant Emission Rates

Logan City Power
Source
UTM Coordinates Modeled Emission Rates
Easting Northing NOx
(m) (m) (lb/hr) (tons/yr) hrs/year
LCPENG1 428457 4616789 1.35 5.91 8760
LCPENG2 428464 4616789 1.35 5.91 8760
LCPENG3 428472 4616789 1.35 5.91 8760
LCPENG4 428480 4616789 1.35 5.91 8760

Total 5.40 23.65
Hyrum City Power
Source
UTM Coordinates Modeled Emission Rates
Easting Northing NOx
(m) (m) (lb/hr) (tons/yr) hrs/year
ENGINE1 427891 4611026 1.43 6.26 8760
ENGINE2 427897 4611026 1.43 6.26 8760
ENGINE3 427903 4611026 1.43 6.26 8760
ENGINE4 427909 4611026 1.43 6.26 8760
ENGINE5 427915 4611026 1.43 6.26 8760
GENSET 427922 4611001 1.75 7.67 8760

Total 8.90 38.98
Swift Beef
Source
UTM Coordinates Modeled Emission Rates
Easting Northing NOx
(m) (m) (lb/hr) (tons/yr) hrs/year
BEEF 428402 4610505 14.95 65.50 8760

Total 14.95 65.50

DAQE- MN161960001-24
Page 4

10. Source Location and Parameters
Source Type
Source Parameters
Elev, Ht Temp Flow Dia
(ft) (m) (ft) (K) (m/s) (ft)
LCPENG1 POINT 4479.8 11.3 37.0 685 24.77 0.61
LCPENG2 POINT 4479.9 11.3 37.0 685 24.77 0.61
LCPENG3 POINT 4480.0 11.3 37.0 685 24.77 0.61
LCPENG4 POINT 4480.2 11.3 37.0 685 24.77 0.61
ENGINE1 POINT 4571.9 13.7 45.0 725 30.90 0.61
ENGINE2 POINT 4571.9 13.7 45.0 725 30.90 0.61
ENGINE3 POINT 4572.0 13.7 45.0 725 30.90 0.61
ENGINE4 POINT 4572.1 13.7 45.0 725 30.90 0.61
ENGINE5 POINT 4572.2 13.7 45.0 725 30.90 0.61
BEEF POINT 4616.2 11.9 39.0 500 15.00 0.61
GENSET POINT 4572.0 1.5 5.0 782 17.87 0.20

IV. RESULTS AND CONCLUSIONS

A. National Ambient Air Quality Standards

The below table provides a comparison of the predicted total air quality concentrations with the
NAAQS. The predicted total concentrations are less than the NAAQS.

Air
Pollutant
Period Prediction Class II
Significant
Impact
Level
Background Nearby
Sources*
Total NAAQS Percent
(μg/m3) (μg/m3) (μg/m3) (μg/m3) (μg/m3) (μg/m3) NAAQS
NO2
1-
Hour 129.1 7.5 39.3 7.4 175.8 188 93.51%

JK:jg

1/23/24, 2:59 PM State of Utah Mail - Fwd: Logan City Power NOI Submittal
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-f:1788906585504952976&simpl=msg-f:1788906585504952976 1/2
Dungan Adams <[e-mail]>
Fwd: Logan City Power NOI Submittal
1 message
Alan Humpherys <[e-mail]>Tue, Jan 23, 2024 at 11:22 AM
To: Dungan Adams <[e-mail]>
Dungan,
Can you please process this permit application?
Site ID: 16196
Peer: Christine
Thanks,
Alan
---------- Forwarded message ---------
From: Clark, Eric <[e-mail]>
Date: Fri, Jan 19, 2024 at 10:30 AM
Subject: Logan City Power NOI Submittal
To: Alan Humpherys <[e-mail]>
Cc: Mark Montgomery <[e-mail]>, Dave Prey <[e-mail]>
Mr. Humphreys:

On behalf of Logan City Power, Stantec is submitting an electronic copy of a NOI application for a new Approval Order.
The link below includes a full NOI with appendices, an emissions inventory and 1-hr NO2 modeling files. The
appropriately signed Form 2 is in Appendix A of the NOI. Logan has not paid the application and new minor source
review fees, but will do so when the appropriate invoice is received. Lastly, please let me know if you have any issues
with accessing the link below. Note that only the people on this email currently have access. Thank you

Logan NOI Submittal

Eric Clark P.E.
Project Engineer

Direct: 208 388-4324
Mobile: [phone]
[e-mail]

Stantec

1/23/24, 2:59 PM State of Utah Mail - Fwd: Logan City Power NOI Submittal
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-f:1788906585504952976&simpl=msg-f:1788906585504952976 2/2

The content of this email is the confidential property of Stantec and should not be copied, modified, retransmitted, or used for any purpose except with Stantec's written authorization. If you are not
the intended recipient, please delete all copies and notify us immediately.
--
Alan Humpherys
Manager | Minor NSR Section
P: [phone]
F: [phone]
airquality.utah.gov
Emails to and from this email address may be considered public records and thus subject to Utah GRAMA
requirements.
2 attachments
Logan NOI FINAL 01-18-24.pdf
5875K
Logan Engines.xlsx
25K
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…1/10
Dungan Adams <[e-mail]>
NOI Received for Logan City Power
17 messages
Dungan Adams <[e-mail]>Thu, Jan 25, 2024 at 3:46 PM
To: [e-mail]
Cc: [e-mail]
Hi Eric,
The Utah Division of Air Quality (DAQ) has received Logan City Power's NOI for a new natural gas power plant. I will be
reviewing the NOI and will let you know if I have any questions.
Is it possible to allow me access to the Logan NOI Submittal link that was sent to Alan Humphreys?
Thanks,
Dungan
--

Dungan Adams
Environmental Engineer I | Minor NSR Section
M: [phone]
airquality.utah.gov
Clark, Eric <[e-mail]>Thu, Jan 25, 2024 at 3:54 PM
To: Dungan Adams <[e-mail]>
Cc: "[e-mail]" <[e-mail]>
Dungan –

Please try this link below. You should have access now. If you have any questions/issues let me know. Thanks

Logan NOI Submittal

Eric Clark, P.E.
Project Engineer
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…2/10
You don't often get email from [e-mail]. Learn why this is important
[e-mail]

From: Dungan Adams <[e-mail]>
Sent: Thursday, January 25, 2024 3:47 PM
To: Clark, Eric <[e-mail]>
Cc: [e-mail]
Subject: NOI Received for Logan City Power

[Quoted text hidden]
Caution: This email originated from outside of Stantec. Please take extra precaution.
Attention: Ce courriel provient de l'extérieur de Stantec. Veuillez prendre des précautions supplémentaires.
Atención: Este correo electrónico proviene de fuera de Stantec. Por favor, tome precauciones adicionales.
Dungan Adams <[e-mail]>Thu, Jan 25, 2024 at 4:13 PM
To: "Clark, Eric" <[e-mail]>
Hi Eric,
Great, I can access everything. Could you also please send Jason Krebs ([e-mail]) the link and allow him
access? Jason is one of the modelers that works with Dave Prey.
Thanks,
Dungan
[Quoted text hidden]
Clark, Eric <[e-mail]>Thu, Jan 25, 2024 at 4:18 PM
To: Jason Krebs <[e-mail]>
Cc: Dungan Adams <[e-mail]>
Jason –

Please see the link below to accessed Logan Power modeling files.
[Quoted text hidden]
Jason Krebs <[e-mail]>Thu, Jan 25, 2024 at 4:30 PM
To: "Clark, Eric" <[e-mail]>, Dave Prey <[e-mail]>
Cc: Dungan Adams <[e-mail]>
Thank you Eric. I was able to download the files.
Jason Krebs | Environmental Scientist | Utah Division of Air Quality
Phone: [phone]
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…3/10
195 North 1950 West, Salt Lake City, UT 84116
Emails to and from this email address may be considered public records and thus subject to Utah GRAMA requirements.
[Quoted text hidden]
Dungan Adams <[e-mail]>Wed, Jan 31, 2024 at 11:46 AM
To: [e-mail]
Cc: [e-mail]
Hi Eric,
I have finished reviewing the NOI Application for Logan City Power's new natural gas power plant. The only small concern
I have is with BACT analysis.
BACT is determined on a case-by-case basis, so stating emission rates from the proposed engines are lower than other
BACT determinations is enough of a justification for BACT selection. The emission rates which are proposed in the NOI
are low compared to other BACT determinations, but there is nothing in the analysis that suggests adding greater
control is infeasible. The BACT analysis is also missing sections for PM, SO2, and HAP control.
Please update the BACT analysis section to include all technically and economically feasible control options for all criteria
pollutants (including PM and SO2) and HAPs. Then evaluate these options taking into consideration energy,
environmental, and economic impacts and justify the control selection. The strongest argument to show a control option is
infeasible is to provide the cost per ton removed of the pollutant.
Let me know if you have any questions. I can provide BACT guidance documentation or try to find a complete BACT
analysis from a similar project if that would be helpful.
Thanks,
Dungan
[Quoted text hidden]
Clark, Eric <[e-mail]>Wed, Jan 31, 2024 at 11:57 AM
To: Dungan Adams <[e-mail]>
Cc: "[e-mail]" <[e-mail]>
Dungan –

I will update the BACT section per your request. I will plan to get this back to you by the end of the week. For my own
understanding, the expected SO2 and PM tpy are 0.21 and 3.49, respectively. Both of those values are less than the
Small Source Exemption of 5 tpy. Is that an appropriate justification for BACT?

Eric Clark, P.E.
Project Engineer
[e-mail]

From: Dungan Adams <[e-mail]>
Sent: Wednesday, January 31, 2024 11:46 AM
To: Clark, Eric <[e-mail]>
Cc: [e-mail]
Subject: Re: NOI Received for Logan City Power

Hi Eric,
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…4/10
You don't often get email from [e-mail]. Learn why this is important
[Quoted text hidden]
[Quoted text hidden]
Caution: This email originated from outside of Stantec. Please take extra precaution.
[Quoted text hidden]
Dungan Adams <[e-mail]>Wed, Jan 31, 2024 at 1:37 PM
To: "Clark, Eric" <[e-mail]>
Eric,
No, this would not be an appropriate justification for BACT. Once a single emission is above the 5 TPY threshold then all
criteria pollutants and HAPs need to be evaluated. For these smaller emissions, the analysis can be short and does not
need to include any cost per ton removed justification. If there is no effective add-on control technology for the pollutant
(as is often the case with SO2) then combustion practices and the use of clean burning fuels will be selected as BACT.
Thanks,
Dungan
[Quoted text hidden]
Clark, Eric <[e-mail]>Wed, Jan 31, 2024 at 3:45 PM
To: Dungan Adams <[e-mail]>
Dungan –

If you do have BACT examples for NG engines for PM and SO2 that would be great. Thanks

Eric Clark, P.E.
Project Engineer
[e-mail]

From: Dungan Adams <[e-mail]>
Sent: Wednesday, January 31, 2024 1:37 PM
To: Clark, Eric <[e-mail]>
[Quoted text hidden]
[Quoted text hidden]
Dungan Adams <[e-mail]>Thu, Feb 1, 2024 at 9:27 AM
To: "Clark, Eric" <[e-mail]>
Hi Eric,
I've gone through several older projects for natural gas power plants and the BACT determinations for PM and SO2 are
very uniform. BACT for PM will be proper maintenance and good combustion practices. BACT for SO2 will be the
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…5/10
combustion of low sulfur fuel (natural gas). From these BACT determinations, it looks like the DAQ is not aware of any
greater control (outside of SCR and OC) that can further reduce NOx, CO, VOC, and HAP emissions.
Based on these determinations, you do not need to update the BACT analysis for this project. I'm sorry if this has created
any extra work for you and your team. For future NOIs, I would suggest Stantec briefly mention BACT for PM and SO2
and state Stantec is unaware of any feasible control outside of SCRs and OCs which further limit NOx, CO, VOCs, and
HAPs. This will make the BACT analysis more complete and streamline the process for permit engineers.
Again, sorry for any hassle my initial request caused. Please let me know if you have any questions.
Thanks,
Dungan
[Quoted text hidden]
Clark, Eric <[e-mail]>Thu, Feb 1, 2024 at 9:32 AM
To: Dungan Adams <[e-mail]>
Dungan –

Noted. Unfortunately, I did spend extra time. That said, I have a good background for next time and can add to any
subsequent NOIs. I appreciate your clarification. Please let me know if you have any other questions regarding the
NOI. Also, do you have any feel for when the modeling review might be completed so I can give the city an
approximate timeline for next steps. Thanks again.
[Quoted text hidden]
Dungan Adams <[e-mail]>Thu, Feb 1, 2024 at 11:24 AM
To: "Clark, Eric" <[e-mail]>
Eric,
Modeling estimates the review will be completed in roughly five weeks. For a recent project with slightly more complicated
modeling, I submitted modeling info on December 5th, 2023 and the modeling review memo was completed today.
Hopefully that gives you a reference.
Let me know if you have any other questions.
Thanks,
Dungan
[Quoted text hidden]
Clark, Eric <[e-mail]>Thu, Feb 1, 2024 at 11:25 AM
To: Dungan Adams <[e-mail]>
Dungan –

Thank you!
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…6/10
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
[Quoted text hidden]
Thanks,
Dungan

--

Dungan Adams
Environmental Engineer I | Minor NSR Section
M: [phone]
airquality.utah.gov

--

2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…7/10
Dungan Adams
Environmental Engineer I | Minor NSR Section
M: [phone]
airquality.utah.gov
Caution: This email originated from outside of Stantec. Please take extra precaution.
Attention: Ce courriel provient de l'extérieur de Stantec. Veuillez prendre des précautions supplémentaires.
Atención: Este correo electrónico proviene de fuera de Stantec. Por favor, tome precauciones adicionales.

--

Dungan Adams
Environmental Engineer I | Minor NSR Section
M: [phone]
airquality.utah.gov
Caution: This email originated from outside of Stantec. Please take extra precaution.
Attention: Ce courriel provient de l'extérieur de Stantec. Veuillez prendre des précautions supplémentaires.
Atención: Este correo electrónico proviene de fuera de Stantec. Por favor, tome precauciones adicionales.
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…8/10

--

Dungan Adams
Environmental Engineer I | Minor NSR Section
M: [phone]
airquality.utah.gov
Caution: This email originated from outside of Stantec. Please take extra precaution.
Attention: Ce courriel provient de l'extérieur de Stantec. Veuillez prendre des précautions supplémentaires.
Atención: Este correo electrónico proviene de fuera de Stantec. Por favor, tome precauciones adicionales.

--

Dungan Adams
Environmental Engineer I | Minor NSR Section
M: [phone]
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r8752044579138…9/10
airquality.utah.gov
[Quoted text hidden]
Dungan Adams <[e-mail]>Thu, Feb 15, 2024 at 12:24 PM
To: "Clark, Eric" <[e-mail]>
Hi Eric,
Can you please confirm the proposed Logan Natural Gas Power Plant will not have any emergency generators on site.
Thanks,
Dungan
[Quoted text hidden]
--

[Quoted text hidden]
Clark, Eric <[e-mail]>Thu, Feb 15, 2024 at 1:00 PM
To: Dungan Adams <[e-mail]>
Dungan –

I don’t believe so, but I am checking with the vendor/facility? When I have an answer I will let you know. Thanks

Eric Clark, P.E.
Senior Engineer
[e-mail]
[Quoted text hidden]
Clark, Eric <[e-mail]>Thu, Feb 15, 2024 at 7:23 PM
To: Dungan Adams <[e-mail]>
Dungan -
I confirmed that there no emergency engine. Thanks
Sent from my iPhone. Sorry for any potential typographical errors.
From: Clark, Eric
Sent: Thursday, February 15, 2024 1:00:15 PM
2/21/24, 1:10 PM State of Utah Mail - NOI Received for Logan City Power
https://mail.google.com/mail/u/0/?ik=c52f18613a&view=pt&search=all&permthid=thread-a:r-8514858377921959152&simpl=msg-a:r875204457913…10/10
To: Dungan Adams <[e-mail]>
Subject: RE: NOI Received for Logan City Power

[Quoted text hidden]
Dungan Adams <[e-mail]>Fri, Feb 16, 2024 at 8:07 AM
To: "Clark, Eric" <[e-mail]>
Great, thank you for confirming.
Dungan
[Quoted text hidden]
Logan City Power
NOx CO PM10 PM2.5 VOC SO2 HAP CO2e
10 Engine SCR/OC Control 2.12 2.79 0.80 0.80 2.72 0.05 2.28 12,521
NOx CO PM10 PM2.5 VOC SO2 HAP CO2e
10 Engine SCR/OC Control 9.27 12.23 3.49 3.49 11.91 0.21 10.01 54,842
Configuration
Configuration
Project Summary Emissions Estimates
Pounds Per Hour
Tons Per Year
1 of 2
Logan City Power
Rating (hp)3427 hp
Operational Hours 8760 hr/yr
Engine Type
Number of Units 4
Engine Fuel Consumption 5822 Btu/bhp-hr
Criteria Pollutants g/hp-hr lb/MMBtu lb/hr Tons/yr Reference
NOx*0.07 2.12 9.27
CO*0.092 2.79 12.23
PM10**9.99E-03 0.80 3.49
PM2.5**9.99E-03 0.80 3.49
VOC***0.09 2.72 11.91
SO2 5.88E-04 0.05 0.21
HAP 2.28 10.01 See Below
* NOx is controlled to 0.07 g/bhp-hr with the SCR included. CO is 93% controlled with OC and SCR
** PM2.5/10 AP_42, Section 3.2
*** VOC and HAPs are controlled by 50% per CAT OC/SCR, respectively. All HAP/TAPs are trace organic compounds
Hazard Pollutant lb/hr Tons/yr Reference
1,1,2,2-Tetrachloroethane 4.00E-05 1.60E-03 6.99E-03
1,1,2-Trichloroethane 3.18E-05 1.27E-03 5.56E-03
1,3-Butadiene 2.67E-04 1.07E-02 4.67E-02
1,3-Dichloropropane 2.64E-05 1.05E-03 4.61E-03
2,2,4-Trimethylpentane 2.50E-04 9.98E-03 4.37E-02
2-Methylnaphthalene 3.32E-05 1.32E-03 5.80E-03
Acenaphthene 1.25E-06 4.99E-05 2.18E-04
Acenaphthylene 5.53E-06 2.21E-04 9.67E-04
Acetaldehyde 8.36E-03 3.34E-01 1.46E+00
Acrolein 5.14E-03 2.05E-01 8.98E-01
Benzene 4.40E-04 1.76E-02 7.69E-02
Benzo(b)fluoranthene 1.66E-07 6.62E-06 2.90E-05
Benzo(e)pyrene 4.15E-07 1.66E-05 7.25E-05
Benzo(g,h,i)perylene 4.14E-07 1.65E-05 7.24E-05
Biphenyl 2.12E-04 8.46E-03 3.71E-02
Carbon Tetrachloride 3.67E-05 1.46E-03 6.41E-03
Chlorobenzene 3.04E-05 1.21E-03 5.31E-03
Chloroform 2.85E-05 1.14E-03 4.98E-03
Chrysene 6.93E-07 2.77E-05 1.21E-04
Ethylbenzene 3.97E-05 1.58E-03 6.94E-03
Ethylene Dibromide 4.43E-05 1.77E-03 7.74E-03
Fluoranthene 1.11E-06 4.43E-05 1.94E-04
Fluorene 5.67E-06 2.26E-04 9.91E-04
Formaldehyde 2.00E-01 1.51E+00 6.62E+00
Methanol 2.50E-03 9.98E-02 4.37E-01
Methylene Chloride 2.00E-05 7.98E-04 3.50E-03
Hexane 1.11E-03 4.43E-02 1.94E-01
Naphthalene 7.44E-05 2.97E-03 1.30E-02
PAH 2.69E-05 1.07E-03 4.70E-03
Phenanthrene 1.04E-05 4.15E-04 1.82E-03
Phenol 2.40E-05 9.58E-04 4.19E-03
Pyrene 1.36E-06 5.43E-05 2.38E-04
Styrene 2.36E-05 9.42E-04 4.12E-03
Tetrachloroethane 2.48E-06 9.90E-05 4.33E-04
Toluene 4.08E-04 1.63E-02 7.13E-02
Vinyl Chloride 1.49E-05 5.95E-04 2.60E-03
Xylene 1.84E-04 7.34E-03 3.22E-02
* Formaldehyde is from Safety Power (75%); also EF is in g/hp-hr
GHG Pollutant g/MMBtu lb/hr Tons/yr GWP Reference*
CO2 414 12,511 54,799 1
CH4 1 1.76E-01 7.71E-01 25
N2O 0.1 1.76E-02 7.71E-02 298
CO2e 12,521 54,842
*https://www.epa.gov/system/files/documents/2023-03/ghg_emission_factors_hub.pdf; CO2 is 414 g/hp-hr
EPA GHG Emission
Factors * CAT data
Proposed Natural Gas Engines (Controlled)
4-Stroke lean burn
Manufacturer Data or
AP-42 Table 3.2-2
lb/MMBtu
Manufacturer Data or
AP-42 Table 3.2-2
2 of 2
Form 1 Date __________________
Notice of Intent (NOI) Application Checklist
Company __________________
Utah Division of Air Quality
New Source Review Section
Source Identification Information [R307-401-5]
1. Company name, mailing address, physical address and telephone number
2. Company contact (Name, mailing address, and telephone number)
3. Name and contact of person submitting NOI application (if different than 2)
4. Source Universal Transverse Mercator (UTM) coordinates
5. Source Standard Industrial Classification (SIC) code
6. Area designation (attainment, maintenance, or nonattainment)
7. Federal/State requirement applicability (NAAQS, NSPS, MACT, SIP, etc.)
8. Source size determination (Major, Minor, PSD)
9. Current Approval Order(s) and/or Title V Permit numbers
NOI Application Information:[R307-401]
N/A
N/A
A. Air quality analysis (air model, met data, background data, source impact analysis) N/A
Detailed description of the project and source process
Discussion of fuels, raw materials, and products consumed/produced
Description of equipment used in the process and operating schedule
Description of changes to the process, production rates, etc.
Site plan of source with building dimensions, stack parameters, etc.
Best Available Control Technology (BACT) Analysis [R307-401-8]
BACT analysis for all new and modified equipment
Emissions Related Information: [R307-401-2(b)]
Emission calculations for each new/modified unit and site-wide
(Include PM10, PM2.5, NOx, SO2, CO, VOCs, HAPs, and GHGs)
References/assumptions, SDS, for each calculation and pollutant
All speciated HAP emissions (list in lbs/hr)
Emissions Impact Analysis – Approved Modeling Protocol [R307-410]
Composition and physical characteristics of effluent
(emission rates, temperature, volume, pollutant types and concentrations)
Nonattainment/Maintenance Areas – Major NSR/Minor (offsetting only) [R307-403]
NAAQS demonstration, Lowest Achievable Emission Rate, Offset requirements
Alternative site analysis, Major source ownership compliance certification
Major Sources in Attainment or Unclassified Areas (PSD) [R307-405, R307-406]
Visibility impact analysis, Class I area impact N/A
Note: The Division of Air Quality will not accept documents containing confidential information or data.
Documents containing confidential information will be returned to the Source submitting the application.
1/9/2024
Logan City Power
1 of 1
Form 2 Date ____________
Company Information/Notice of Intent (NOI)
Utah Division of Air Quality
New Source Review Section
Application for: Initial Approval Order Approval Order Modification
General Owner and Source Information
1.Company name and mailing address:
____________________________
____________________________
____________________________
Phone No.: ( )
Fax No.: ( )
2. Company** contact for environmental matters:
____________________________
Phone no.: ( )
Email:_______________________
** Company contact only; consultant or independent contractor contact
information can be provided in a cover letter
3. Source name and physical address (if different from
above):____________________________
____________________________
____________________________
Phone no.: ( )
Fax no.: ( )
4. Source Property Universal Transverse Mercator
coordinates (UTM), including System and Datum:
UTM:_________________________
X:____________________________
Y:____________________________
5. The Source is located in:__________________ County 6.Standard Industrial Classification Code (SIC)
__ __ __ __
7. If request for modification, AO# to be modified: DAQE #__________________ DATED: ____/____/____
8. Brief (50 words or less) description of process.
Electronic NOI
9. A complete and accurate electronic NOI submitted to DAQ Permitting Mangers Jon Black ([e-mail]) or Alan
Humpherys ([e-mail]) can expedite review process. Please mark application type.
Hard Copy Submittal Electronic Copy Submittal
Authorization/Signature
I hereby certify that the information and data submitted in and with this application is completely true, accurate and
complete, based on reasonable inquiry made by me and to the best of my knowledge and belief.
Signature: Title:
_______________________________________
Name (Type or print)
Telephone Number:
( )
Email:
Date:
1/9/2024
Logan City Power
530 North 800 West
Logan, Utah 84321
[phone]
Mark Montgomery
[phone]
[e-mail]
SE corner of W 1800 S
and S 1000 W
Logan, Utah 84321
[phone]
Cache
12
428461.67 m
4616796.43 m
4911
N/A
This a new natural gas power plant with 4 CAT 3520H engines
Power & Light Director
Mark Montgomery [phone]
[e-mail]
1/9/24
Page 1 of 1
Company___________________________
_____________________________
Form
Emissions Information
Criteria/GHGs/
Utah Division of Air Quality
New Source Review Section
Potential to Emit* Criteria Pollutants & GHGs
Criteria Pollutants Permitted Emissions
(tons/yr)
Emissions Increases
(tons/yr)
Proposed Emissions
(tons/yr)
PM10 Total
PM10 Fugitive
PM2.5
NOx
SO2
CO
VOC
VOC Fugitive
NH3
Greenhouse Gases CO2e CO2e CO2e
CO2
CH4
N2O
HFCs
PFCs
SF6
Total CO2e
*Potential to emit to include pollution control equipment as defined by R307-401-2.
Hazardous Air Pollutants**(**Defined in Section 112(b) of the Clean Air Act )
Hazardous Air
Pollutant***
Permitted Emissions
(tons/yr)
Emission Increase
(tons/yr)
Proposed
Emission (tons/yr)
Emission Increase
(lbs/hr)
Total HAP
*** Use additional sheets for pollutants if needed
Logan City Power
Logan City Generation
0.00 3.49 3.49
0.00 0.00 0.00
0.00 3.49 3.49
0.00 9.27 9.27
0.00 0.21 0.21
0.00 12.23 12.23
0.00 11.91 11.91
0.00 0.00 0.00
0.00
0.00 54,799.00 54,799.00
0.00 0.77 0.77
0.00 0.08 0.08
0.00 0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00
See Appendix C
0.00 10.01 10.01 2.28
Utah Division of Air Quality
New Source Review Section
Form 11
Internal Combustion Engines
Equipment Information
Gas Firing
Oil Firing
Logan City Power
Logan Power Generation
1/9/2024
Caterpillar (4 units)
G3520H 24 24
7 7
2024 52 52
3427
3427
685.4 for 4 engines total
19.95 per engine
Internal Combustion Engine
Form 11 (Continued)
Operation
Emissions Data
Method of Emission Control:
Additional Information
X
0.07 0.092 0.09
0.05
IN
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HIGH ALTITUDE/AMBIENT
CAT LOW PRESSURE
WITH AIR FUEL RATIO CONTROL
Gas Analysis
2.0-5.0
76.7
961
4491
85
3457 bhp@1500rpm
1.0
4160-13800
RATING STRATEGY:
FUEL SYSTEM:
SITE CONDITIONS:
FUEL:
FUEL PRESSURE RANGE(psig): (See note 1)
FUEL METHANE NUMBER:
FUEL LHV (Btu/scf):
ALTITUDE(ft):
INLET AIR TEMPERATURE(°F):
STANDARD RATED POWER:
POWER FACTOR:
VOLTAGE(V):
ENGINE SPEED (rpm): 1500
COMPRESSION RATIO: 12.1
AFTERCOOLER TYPE: SCAC
AFTERCOOLER - STAGE 2 INLET (°F): 118
AFTERCOOLER - STAGE 1 INLET (°F): 192
JACKET WATER OUTLET (°F): 210
ASPIRATION: TA
COOLING SYSTEM: JW+OC+1AC, 2AC+GB
CONTROL SYSTEM:ADEM4 W/ IM
EXHAUST MANIFOLD: DRY
COMBUSTION: LOW EMISSION
NOx EMISSION LEVEL (g/bhp-hr NOx): 1.0
SET POINT TIMING: 17
RATING NOTES LOAD 100%100%75%50%
GENSET POWER (WITH GEARBOX, WITHOUT FAN)(2)(3) ekW 2473 2471 1853 1235
GENSET POWER (WITH GEARBOX, WITHOUT FAN)(2)(3) kVA 2474 2471 1853 1235
ENGINE POWER (WITHOUT GEARBOX, WITHOUT FAN)(3) bhp 3431 3427 2582 1736
INLET AIR TEMPERATURE °F 77 85 85 85
GENERATOR EFFICIENCY (2) % 97.4 97.4 97.0 96.2
GENSET EFFICIENCY (ISO 3046/1)(4)(5) % 43.7 43.7 42.6 40.4
THERMAL EFFICIENCY (4)(6) % 42.1 42.1 43.3 46.1
TOTAL EFFICIENCY (4)(7) % 85.8 85.8 85.9 86.5
MAXIMUM
RATING
SITE RATING AT MAXIMUM
INLET AIR TEMPERATURE
ENGINE DATA
GENSET FUEL CONSUMPTION (ISO 3046/1)(8) Btu/ekW-hr 7806 7807 8003 8454
GENSET FUEL CONSUMPTION (NOMINAL)(8) Btu/ekW-hr 8075 8076 8279 8746
ENGINE FUEL CONSUMPTION (NOMINAL)(8) Btu/bhp-hr 5822 5822 5941 6224
AIR FLOW (@inlet air temp, 14.7 psia)(WET)(9) ft3/min 6209 6294 4687 3141
AIR FLOW (WET)(9) lb/hr 27526 27497 20478 13724
FUEL FLOW (60°F, 14.7 psia) scfm 346 346 266 187
INLET MANIFOLD PRESSURE (10) in Hg(abs) 134.4 134.3 100.8 68.7
EXHAUST TEMPERATURE - ENGINE OUTLET (11) °F 773 774 837 945
EXHAUST GAS FLOW (@engine outlet temp, 14.5 psia)(WET)(12) ft3/min 15330 15317 12013 8752
EXHAUST GAS MASS FLOW (WET)(12) lb/hr 28492 28461 21219 14246
MAX INLET RESTRICTION (13) in H2O 14.28 14.26 9.89 7.09
MAX EXHAUST RESTRICTION (13) in H2O 20.71 20.67 11.90 5.90
EMISSIONS DATA - ENGINE OUT
NOx (as NO2) (14)(15) g/bhp-hr 1.00 1.00 1.00 1.00
CO (14)(15) g/bhp-hr 1.32 1.32 1.26 1.23
THC (mol. wt. of 15.84) (14)(15) g/bhp-hr 1.65 1.65 1.72 1.66
NMHC (mol. wt. of 15.84) (14)(15) g/bhp-hr 0.25 0.25 0.26 0.26
NMNEHC (VOCs) (mol. wt. of 15.84) (14)(15)(16) g/bhp-hr 0.18 0.18 0.19 0.18
HCHO (Formaldehyde) (14)(15) g/bhp-hr 0.20 0.20 0.20 0.21
CO2 (14)(15) g/bhp-hr 414 414 421 431
EXHAUST OXYGEN (14)(17) % DRY 9.4 9.4 9.1 8.7
HEAT REJECTION
LHV INPUT (18) Btu/min 332903 332584 255700 180078
HEAT REJ. TO JACKET WATER (JW) (19) Btu/min 34374 34359 29227 24150
HEAT REJ. TO ATMOSPHERE (INCLUDES GENERATOR)(19) Btu/min 7984 7980 6885 5734
HEAT REJ. TO LUBE OIL (OC) (19) Btu/min 12556 12551 11279 9705
HEAT REJECTION TO EXHAUST (LHV TO 248°F) (19) Btu/min 66401 66362 55322 44258
HEAT REJ. TO A/C - STAGE 1 (1AC) (19)(21) Btu/min 27945 27886 15686 5559
HEAT REJ. TO A/C - STAGE 2 (2AC) (19)(21) Btu/min 16757 16736 12006 6804
HEAT REJECTION FROM GEARBOX (GB) (19) Btu/min 1149 1148 865 582
PUMP POWER (20) Btu/min 859 859 859 859
COOLING SYSTEM SIZING CRITERIA
TOTAL JACKET WATER CIRCUIT (JW+OC+1AC) (22) Btu/min 87484 89030
TOTAL STAGE 2 AFTERCOOLER CIRCUIT (2AC+GB)(22) Btu/min 20360 20813
HEAT REJECTION TO EXHAUST (LHV TO 248°F) (22) Btu/min 73041 72998
A cooling system safety factor of 0% has been added to the cooling system sizing criteria.
MINIMUM HEAT RECOVERY
TOTAL JACKET WATER CIRCUIT (JW+OC+1AC) (23) Btu/min 67529 67455
TOTAL STAGE 2 AFTERCOOLER CIRCUIT (2AC+GB)(23) Btu/min 17012 16990
HEAT REJECTION TO EXHAUST (LHV TO 248°F) (23) Btu/min 54256 52455
CONDITIONS AND DEFINITIONS
Engine rating obtained and presented in accordance with ISO 3046/1, adjusted for fuel, site altitude and site inlet air temperature. 100% rating at maximum inlet air temperature
is the maximum engine capability for the specified fuel at site altitude and maximum site inlet air temperature. Maximum rating is the maximum capability at the specified
aftercooler inlet temperature for the specified fuel at site altitude and reduced inlet air temperature. Refer to product O&M manual for details on additional lower load capability.
No overload permitted at rating shown.
For notes information consult page three.
GENSET - WITHOUT RADIATOR
Page 1 of 4Data generated by GERP Web Version 2.7.0.14
Ref. Dta Set EM2181-01-001, Printed 22Jun2023
PREPARED BY: Shane Minor, Wheeler Machinery Co.
GAS ENGINE SITE SPECIFIC TECHNICAL DATAG3520HLogan w Gas Analysis

Safety Power Inc
26-5155 Spectrum Way
Mississauga, On L4W 5A1
Canada
www.safetypower.com
Page 5 of 24
Confidential
99002010 Rev12.2
clean essential energy
DESIGN PARAMETERS
The design of the Safety Power emissions reduction system is based on the following conditions.
Note: NOx is calculated as NO2.
Table 1 Engine Data
Engine Type: CAT G3520H
Application Stand-by
Engine Power 2471 ekW
Exhaust Temperature 774 °F
Design Exhaust Flow Rate 15317 (CFM)
Fuel Type Pipe Line NG

Table 2 Emissions Data at Full Engine Load
Engine Option Emissions Catalyst Inlet Emissions
Requirement Catalyst Outlet
CAT G3520H
NOx (g/bhp-h) 1.00 0.07 0.07
CO 1.32 (g/bhp-h) 93 (% reduction) 93 (% reduction)
VOC 0.18 (g/bhp-h) 50 (% reduction) 50 (% reduction)
HCHO 0.20 (g/bhp-h) 75 (% reduction) 75 (% reduction)

eady state
using SCAQMD method 100.1 for NOx and SCAQMD/EPA methods 25.1/25.3
-hr is to be assumed (unless otherwise stated).

Table 3 SCR System Data
Engine Option CAT G3520H
Max. Ammonia Slip @ 15% O2 8 ppm
Urea Consumption - 32.5% solution (+/- 15%) 1.6 USG/hr
System Pressure Loss 11.0" WC
System Inlet/Outlet ANSI Flange Inches 22/22