DAQ-2024-007392

DAQE-AN143300007-24

{{$d1 }}

Wayne Marcelis
Oracle America, Incorporated
P.O. Box 9004
West Jordan, UT 84084
[e-mail]

Dear Mr. Marcelis:

Re: Approval Order: Modification to Approval Order DAQE-AN143300006-22 to Add an
Emergency Pump Engine and Increase Operating Hours for the Emergency Generator Engines
Project Number: N143300007

The attached Approval Order (AO) is issued pursuant to the Notice of Intent (NOI) received on October
18, 2023. Oracle America, Incorporated must comply with the requirements of this AO, all applicable
state requirements (R307), and Federal Standards.

The project engineer for this action is Mr. Enqiang He, 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:EH:jg

cc: Salt Lake County 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

March 11, 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-AN143300007-24
Modification to Approval Order DAQE-AN143300006-22
to Add an Emergency Pump Engine and Increase Operating
Hours for the Emergency Generator Engines

Prepared By
Mr. Enqiang He, Engineer
[phone]
[e-mail]

Issued to
Oracle America, Incorporated - Utah Computer Center

Issued On
{{$d2 }}

Issued By

{{$s }}

Bryce C. Bird
Director
Division of Air Quality
March 11, 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 ..................................................................................... 6
PERMIT HISTORY ..................................................................................................................... 7
ACRONYMS ................................................................................................................................. 8

DAQE-AN143300007-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Oracle America, Incorporated Oracle America, Incorporated - Utah Computer
Center

Mailing Address Physical Address
P.O. Box 9004 6136 West 10120 South
West Jordan, UT 84084 West Jordan, UT 84081

Source Contact UTM Coordinates
Name: Wayne Marcelis 412,171 m Easting
Phone: [phone],491,445 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12

SIC code 7374 (Computer Processing & Data Preparation & Processing Services)

SOURCE INFORMATION
General Description
Oracle America, Incorporated (Oracle) operates a secured data center located in West Jordan. Twelve
(12) emergency generator engines support 100% uptime of this data center during times of possible utility
power outages, equipment failures, and equipment maintenance. While the standby generators start,
synch, and support the building loads, UPS backup power supports critical IT equipment to ensure there
are no power failures. Oracle also operates an emergency fire pump engine.

NSR Classification
Minor Modification at Minor Source

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA, Salt Lake County SO2
NAA
Salt Lake County
Airs Source Size: B

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
DAQE-AN143300007-24
Page 4

Project Description
Oracle has requested to add an emergency pump engine with a maximum capacity of 117 kW (157 hp).
The pump engine shall be allowed to operate for up to 100 hours per year for testing and maintenance.
The company has also requested to increase annual operating hours from 70 to 100 for the emergency
generator engines. There are no restrictions on operating hours during emergencies for the emergency
generator and pump engines.

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 9 2229.00
Carbon Monoxide 0.06 11.98
Nitrogen Dioxide 0.05 21.92
Particulate Matter - PM10 0 0.68
Particulate Matter - PM2.5 0 0.68
Sulfur Dioxide 0.02 0.05
Volatile Organic Compounds 0 1.33

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Acetaldehyde (CAS #75070) 0 1
Acrolein (CAS #107028) 0 0
Benzene (Including Benzene From Gasoline) (CAS #71432) 0 21
Formaldehyde (CAS #50000) 0 2
PAH, Total (CAS #234) 0 6
Toluene (CAS #108883) 0 8
Xylenes (Isomers And Mixture) (CAS #1330207) 0 5
Change (TPY) Total (TPY)
Total HAPs 0 0.02

SECTION I: GENERAL PROVISIONS

I.1 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.2 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.3 All records referenced in this AO or in other applicable rules, which are required to be kept by
the owner/operator, shall be made available to the Director or Director's representative upon
request, and the records shall include the two-year period prior to the date of the request.
Unless otherwise specified in this AO or in other applicable state and federal rules, records
shall be kept for a minimum of two (2) years. [R307-401-8]

DAQE-AN143300007-24
Page 5

I.4 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.5 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

I.6 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories.
[R307-150]

I.7 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]

SECTION II: PERMITTED EQUIPMENT

II.A THE APPROVED EQUIPMENT

II.A.1 Oracle Utah Compute Center
Source-wide Equipment

II.A.2 Emergency Generator Engines 1-8
Fuel: Diesel
Maximum Engine Rating: Eight (8) 3,353 hp engines
Model Year: 2010
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

II.A.3 Emergency Generator Engines 9-10
Fuel: Diesel
Maximum Engine Rating: Two (2) 4,060 hp engines
Model Year: 2014
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

II.A.4 Emergency Generator Engines 11-12
Fuel: Diesel
Maximum Engine Rating: One (1) 5,051 hp engine and one (1) 1,490 hp engine
Model Year: 2016
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

DAQE-AN143300007-24
Page 6

II.A.5 Emergency Fire Pump Engine - new
One (1) pump engine
Fuel: diesel
Maximum Engine Rating: 117 kW (157 hp)
Model Year: 2010
NSPS Applicability: Subpart IIII
MACT Applicability: 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 only use diesel fuel (e.g. fuel oil #1, #2, or diesel fuel oil additives) as
fuel in the emergency engines. [R307-401-8]

II.B.1.b The owner/operator shall only combust diesel fuel that meets the definition of ultra-low sulfur
diesel (ULSD), which has a sulfur content of 15 ppm or less. [R307-401-8]

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

II.B.1.c The owner/operator shall operate emergency generator engines for electric power-producing
operation, and emergency pump engine to run the water pump only during periods when electric
power from the public utilities is interrupted, or for maintenance and testing of the emergency
generator/pump engines and load systems. [R307-401-8]

II.B.1.d The owner/operator shall not operate each emergency generator or pump engine:

A. More than a total of 100 hours per rolling 12-month period for planned testing
and maintenance purposes, and

B. More than 52 days per rolling 12-month period for planned testing and
maintenance purposes.

[R307-401-8, R307-410-4]

II.B.1.d.1 To determine compliance with a rolling 12-month total, the owner/operator shall calculate a new
12-month total by the 20th day of each month using data from the previous 12 months. Records
documenting the operation of each emergency engine shall be kept in a log and shall include the
following:

A. The date and time the emergency engine was used

B. The duration of operation in hours

C. The reason for the emergency-engine usage.

[R307-401-8]

DAQE-AN143300007-24
Page 7

II.B.1.e The owner/operator may operate the emergency generator and pump engines for emergencies
including unplanned emergency maintenance and repairs. There is no time limit on the use of
the engines during the emergencies. [R307-401-8]

II.B.1.f To determine the duration of engine operations, the owner/operator shall install a non-resettable
hour meter for each emergency engine. [40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.1.g The owner/operator shall not allow visible emissions from the emergency generator and pump
engines to exceed 20% opacity. [R307-401-8]

II.B.1.g.1 Opacity observations of emissions from stationary sources shall be conducted according to 40
CFR 60, Appendix A, Method 9. [R307-201-3]

PERMIT HISTORY

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

Supersedes AO DAQE-AN143300006-22 dated November 4, 2022
Incorporates NOI dated October 18, 2023
Incorporates Additional information dated October 25, 2023
Incorporates Additional information dated October 30, 2023
Incorporates DAQE-MN143300007 dated January 10, 2024

DAQE-AN143300007-24
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-IN143300007-24

February 1, 2024

Wayne Marcelis
Oracle America, Incorporated
P.O. Box 9004
West Jordan, UT 84084
[e-mail]

Dear Mr. Marcelis:

Re: Intent to Approve: Modification to Approval Order DAQE-AN143300006-22 to Add an
Emergency Pump Engine and Increase Operating Hours for the Emergency Generator Engines
Project Number: N143300007

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

Sincerely,

{{$s }}

Alan D. Humpherys, Manager
New Source Review Section

ADH:EH:jg

cc: Salt Lake County 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-IN143300007-24
Modification to Approval Order DAQE-AN143300006-22 to
Add an Emergency Pump Engine and Increase Operating Hours for
the Emergency Generator Engines

Prepared By
Mr. Enqiang He, Engineer
[phone]
[e-mail]

Issued to
Oracle America, Incorporated - Utah Computer Center

Issued On
February 1, 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 ..................................................................................................................... 7
ACRONYMS ................................................................................................................................. 8

DAQE-IN143300007-24
Page 3

GENERAL INFORMATION

CONTACT/LOCATION INFORMATION

Owner Name Source Name
Oracle America, Incorporated Oracle America, Incorporated - Utah Computer
Center

Mailing Address Physical Address
P.O. Box 9004 6136 West 10120 South
West Jordan, UT 84084 West Jordan, UT 84081-4729

Source Contact UTM Coordinates
Name: Wayne Marcelis 412,171 m Easting
Phone: [phone],491,445 m Northing
Email: [e-mail] Datum NAD83
UTM Zone 12

SIC code 7374 (Computer Processing & Data Preparation & Processing Services)

SOURCE INFORMATION
General Description
Oracle America, Incorporated (Oracle) operates a secured data center located in West Jordan. Twelve
(12) emergency generator engines support 100% uptime of this data center during times of possible utility
power outages, equipment failures, and equipment maintenance. While the standby generators start,
synch, and support the building loads, UPS backup power supports critical IT equipment to ensure there
are no power failures. Oracle also operates an emergency fire pump engine.
NSR Classification
Minor Modification at Minor Source

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA, Salt Lake County SO2
NAA
Salt Lake County
Airs Source Size: B

Applicable Federal Standards
NSPS (Part 60), A: General Provisions
NSPS (Part 60), IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines
MACT (Part 63), A: General Provisions
MACT (Part 63), ZZZZ: National Emissions Standards for Hazardous Air Pollutants for
Stationary Reciprocating Internal Combustion Engines
DAQE-IN143300007-24
Page 4

Project Description
Oracle has requested to add an emergency pump engine with maximum capacity of 117 kW (157 hp).
The pump engine shall be allowed to operate up to 100 hours per year for testing and maintenance. The
company has also requested to increase annual operating hours from 70 to 100 for the generator engines.
There are no restrictions on operating hours during emergencies for the emergency generator and pump
engines.

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 9 2229.00
Carbon Monoxide 0.06 11.98
Nitrogen Dioxide 0.05 21.92
Particulate Matter - PM10 0 0.68
Particulate Matter - PM2.5 0 0.68
Sulfur Dioxide 0.02 0.05
Volatile Organic Compounds 0 1.33

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Acetaldehyde (CAS #75070) 0 1
Acrolein (CAS #107028) 0 0
Benzene (Including Benzene From Gasoline) (CAS #71432) 0 21
Formaldehyde (CAS #50000) 0 2
PAH, Total (CAS #234) 0 6
Toluene (CAS #108883) 0 8
Xylenes (Isomers And Mixture) (CAS #1330207) 0 5
Change (TPY) Total (TPY)
Total HAPs 0 0.02

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 Salt Lake Tribune and Deseret News on February 4, 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-IN143300007-24
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 The limits set forth in this AO shall not be exceeded without prior approval. [R307-401]

I.2 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.3 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.4 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.5 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

I.6 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories.
[R307-150]

I.7 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]

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 Oracle Utah Compute Center
Source-wide Equipment

II.A.2 Emergency Generator Engines 1-8
Fuel: Diesel
Maximum Engine Rating: Eight (8) 3,353 hp engines
Model Year: 2010
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

DAQE-IN143300007-24
Page 6

II.A.3 Emergency Generator Engines 9-10
Fuel: Diesel
Maximum Engine Rating: Two (2) 4,060 hp engines
Model Year: 2014
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

II.A.4 Emergency Generator Engines 11-12
Fuel: Diesel
Maximum Engine Rating: One (1) 5,051 hp engine and one (1) 1,490 hp engine
Model Year: 2016
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

II.A.5 Emergency Fire Pump Engine - new
One (1) pump engine
Fuel: diesel
Maximum Engine Rating: 117 kW (157 hp)
Model Year: 2010
NSPS Applicability: Subpart IIII
MACT Applicability: 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 only use diesel fuel (e.g. fuel oil #1, #2, or diesel fuel oil additives) as
fuel in the emergency engines. [R307-401-8]

II.B.1.b The owner/operator shall only combust diesel fuel that meets the definition of ultra-low sulfur
diesel (ULSD), which has a sulfur content of 15 ppm or less. [R307-401-8]

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

II.B.1.c The owner/operator shall operate emergency generator engines for electric power-producing
operation, and emergency pump engine to run the water pump only during periods when electric
power from the public utilities is interrupted, or for maintenance and testing of the emergency
generator/pump engines and load systems. [R307-401-8]

DAQE-IN143300007-24
Page 7

II.B.1.d The owner/operator shall not operate each emergency generator or pump engine:

A. More than a total of 100 hours per rolling 12-month period for planned testing
and maintenance purposes, and

B. More than 52 days per rolling 12-month period for planned testing and
maintenance purposes.

[R307-401-8, R307-410-4]

II.B.1.d.1 To determine compliance with a rolling 12-month total, the owner/operator shall calculate a new
12-month total by the 20th day of each month using data from the previous 12 months. Records
documenting the operation of each emergency engine shall be kept in a log and shall include the
following:

A. The date and time the emergency engine was used

B. The duration of operation in hours

C. The reason for the emergency-engine usage.

[R307-401-8]

II.B.1.e The owner/operator may operate the emergency generator and pump engines for emergencies
including unplanned emergency maintenance and repairs. There is no time limit on the use of
the engines during the emergencies. [R307-401-8]

II.B.1.f To determine the duration of engine operations, the owner/operator shall install a non-resettable
hour meter for each emergency engine. [40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.1.g The owner/operator shall not allow visible emissions from the emergency generator and pump
engines to exceed 20% opacity. [R307-401-8]

II.B.1.g.1 Opacity observations of emissions from stationary sources shall be conducted according to 40
CFR 60, Appendix A, Method 9. [R307-201-3]

PERMIT HISTORY

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

Supersedes AO DAQE-AN143300006-22 dated November 4, 2022
Incorporates NOI dated October 18, 2023
Incorporates Additional information dated October 25, 2023
Incorporates Additional information dated October 30, 2023
Incorporates DAQE-MN143300007 dated January 10, 2024

DAQE-IN143300007-24
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

2/1/24, 12:01 PM State of Utah Mail - Legal Notice to be published February 4, 2024
https://mail.google.com/mail/u/0/?ik=b4fd0e1085&view=pt&search=all&permmsgid=msg-f:1789719953863955948&simpl=msg-f:1789719953863955948 1/1
Jeree Greenwood <[e-mail]>
Legal Notice to be published February 4, 2024
Rylie Stegman <[e-mail]>Thu, Feb 1, 2024 at 10:52 AM
To: Jeree Greenwood <[e-mail]>
Cc: "Salt Lake Tribune LaRee Whitmar - [e-mail]" <[e-mail]>
Hi Jeree! You are all set with ad number SLT0026025!
[Quoted text hidden]
--
Rylie Stegman (She/Her)
Advertising Account Executive
M: [phone]
90 S. 400 W. SLC, UT. 84101 STE. 600
Support The Tribune | Subscribe Today!

DAQE-NN143300007-24

February 1, 2024

Salt Lake Tribune and Deseret News
Legal Advertising Dept.
P.O. Box 704055
West Valley City, UT 84170
Acct #9001399880

RE: Legal Notice of Intent to Approve

This letter will confirm the authorization to publish the attached NOTICE in the Salt Lake Tribune and
Deseret News on February 4, 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: Salt Lake County
cc: Wasatch Front Regional Council

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

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Department of
Environmental Quality

Kimberly D. Shelley
Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird
Director

DAQE-NN143300007-24
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: Oracle America, Incorporated
Location: Oracle America, Incorporated - Utah Computer Center – 6136 West 10120
South, West Jordan, UT
Project Description: Oracle America, Incorporated (Oracle) operates a secured data center located in
West Jordan. Twelve (12) emergency generator engines support 100% uptime of
this data center during times of possible utility power, equipment failures, and
equipment maintenance. While the standby generators start, synch, and support
the building loads, UPS backup power supports critical IT equipment to ensure
there are no power failures. Oracle has requested to add an emergency pump
engine with maximum capacity of 117 kW (157 hp). The pump engine shall be
allowed to operate up to 100 hours per year for testing and maintenance. The
company has also requested to increase annual operating hours from 70 to 100.
There are no restrictions on operating hours during emergencies for the
emergency generator and pump engines.

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 March 5, 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: February 4, 2024

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

DAQE-

RN143300007
January 23, 2024

Wayne Marcelis
Oracle America, Inc.
P.O. Box 9004
West Jordan, UT 84084
[e-mail]

Dear Wayne Marcelis,

Re: Engineer Review:
Modification to AO DAQE-AN143300006-22 to Add an Emergency Pump Engine and Increase
Operating Hours for the Emergency Generator Engines
Project Number: N143300007

The DAQ requests a company representative review and sign the attached Engineer Review (ER). This
ER identifies all applicable elements of the New Source Review permitting program. Oracle America,
Inc. should complete this review within 10 business days of receipt.

Oracle America, Inc. should contact Mr. Enqiang He at [phone] if there are questions or
concerns with the review of the draft permit conditions. Upon resolution of your concerns, please email
Mr. Enqiang He at [e-mail] the signed cover letter. Upon receipt of the signed cover letter, the
DAQ will prepare an ITA for a 30-day public comment period. At the completion of the comment period,
the DAQ will address any comments and will prepare an Approval Order (AO) for signature by the DAQ
Director.

If Oracle America, Inc. does not respond to this letter within 10 business days, the project will move
forward without source concurrence. If Oracle America, Inc. has concerns that cannot be resolved and
the project becomes stagnant, the DAQ Director may issue an Order prohibiting construction.

Approval Signature _____________________________________________________________
(Signature & Date)

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

Kimberly D. Shelley Executive Director

DIVISION OF AIR QUALITY
Bryce C. Bird Director

State of Utah

SPENCER J. COX
Governor

DEIDRE HENDERSON
Lieutenant Governor

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 2024
Page 1
UTAH DIVISION OF AIR QUALITY
ENGINEER REVIEW

SOURCE INFORMATION

Project Number N143300007
Owner Name Oracle America, Inc.
Mailing Address P.O. Box 9004
West Jordan, UT 84084

Source Name Oracle America, Inc. - Utah Computer Center
Source Location 6136 West 10120 South
West Jordan, UT 84081-4729

UTM Projection 412,171 m Easting, 4,491,445 m Northing
UTM Datum NAD83
UTM Zone UTM Zone 12
SIC Code 7374 (Computer Processing & Data Preparation & Processing
Services)

Source Contact Wayne Marcelis
Phone Number [phone]
Email [e-mail]

Billing Contact Wayne Marcelis
Phone Number [phone]
Email [e-mail]

Project Engineer Mr. Enqiang He, Engineer
Phone Number [phone]
Email [e-mail]

Notice of Intent (NOI) Submitted October 18, 2023
Date of Accepted Application January 23, 2024

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 2024
Page 2
SOURCE DESCRIPTION

General Description
Oracle America, Inc. (Oracle) operates a secured data center located in West Jordan. Twelve (12)
emergency generator engines support 100% uptime of this data center during times of possible
utility power outages, equipment failures, and equipment maintenance. While the standby
generators start, synch, and support the building loads, UPS backup power supports critical IT
equipment to ensure there are no power failures. Oracle also operates an emergency fire pump
engine.

NSR Classification:
Minor Modification at Minor Source

Source Classification
Located in Northern Wasatch Front O3 NAA, Salt Lake City UT PM2.5 NAA, Salt Lake County
SO2 NAA
Salt Lake County
Airs Source Size: B

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

Project Proposal
Modification to AO DAQE-AN143300006-22 to Add an Emergency Pump Engine and Increase
Operating Hours for the Emergency Generator Engines

Project Description
Oracle America, Inc has requested to add an emergency pump engine with maximum capacity of
117 kW (157 hp). The pump engine shall be allowed to operate up to 100 hrs per year for testing
and maintenance. The company has also requested to increase annual operating hours from 70 to
100 for the emergency generator engines. There are no restrictions on operating hours during
emergencies for the emergency generator and pump engines.

EMISSION IMPACT ANALYSIS
The emission increases as a result of the addition of an emergency pump engine are below the modeling
thresholds per UAC R307-410-4 and R307-410-5; therefore, modeling is not required from the source. The
DAQ conducted an in-house modeling for 1-hour NO2 emissions. Using the limitations in the current AO
DAQE-AN143300006-22, the predicted NO2 concentration is 92.3% of the NAAQS. Therefore, this
modification will not cause the source to exceed the NAAQS for NO2. [Last updated January 23, 2024]

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 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 9 2229.00
Carbon Monoxide 0.06 11.98
Nitrogen Dioxide 0.05 21.92
Particulate Matter - PM10 0 0.68
Particulate Matter - PM2.5 0 0.68
Sulfur Dioxide 0.02 0.05
Volatile Organic Compounds 0 1.33

Hazardous Air Pollutant Change (lbs/yr) Total (lbs/yr)
Acetaldehyde (CAS #75070) 0 1
Acrolein (CAS #107028) 0 0
Benzene (Including Benzene From Gasoline) (CAS #71432) 0 21
Formaldehyde (CAS #50000) 0 2
PAH, Total (CAS #234) 0 6
Toluene (CAS #108883) 0 8
Xylenes (Isomers And Mixture) (CAS #1330207) 0 5
Change (TPY) Total (TPY)
Total HAPs 0 0.02

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

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 2024
Page 4
Review of BACT for New/Modified Emission Units

1. BACT review regarding the emergency fire pump engine
The emergency fire pump engine is rated at 117 kW. The engine will be operated at 100 hrs per
year for testing and maintenance purposes. Emissions are very small, with the CO emissions being
the highest at 0.06 tpy. Therefore, it is economically infeasible to add any control for such small
emissions. The source, however, will use only ultra-low sulfur content diesel fuel in the engine.
Visible emissions from the engine will be limited to 20% opacity. The Minor NSR Section
considers the sulfur content and the opacity limit as BACT. [Last updated November 6, 2023]

2. BACT review regarding the emergency generator engines
The emissions in the current AO DAQE-AN143300006-22 were actually based on 100 hrs of
operations for each of the generator engines. There are total 12 generator engines, including eight
(8) rated at 3,353 hp each, two (2) rated at 4,060 hp each, one (1) rated at 1,490 hp, and one (1)
rated at 5,051 hp. Total NOx emissions, which are the highest among all criteria pollutants, are
21.87 tpy. The NOx emissions from the 5,051-hp engine were conservatively estimated at 2.66
tpy. The engine operations from 70 (currently) to 100 hrs (proposed) will increase NOx emissions
by less than 0.80 tpy. Therefore, it is economically infeasible to control such small emissions.
Further, the control effectiveness would be even less economically feasible for all other smaller
engines.

The Minor NSR Section recommends the following as BACT: (1) use of diesel fuel with ultra-low
sulfur content, and (2) visible emissions from the engines are limited to 20% opacity. [Last
updated November 6, 2023]

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

I.2 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.3 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]

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 2024
Page 5
I.4 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.5 The owner/operator shall comply with UAC R307-107. General Requirements: Breakdowns.
[R307-107]

I.6 The owner/operator shall comply with UAC R307-150 Series. Emission Inventories. [R307-
150]

I.7 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]

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 Oracle Utah Compute Center
Source-Wide Equipment

II.A.2 Emergency Generator Engines 1-8
Fuel: Diesel
Maximum Engine Rating: Eight (8) 3,353 hp engines
Model Year: 2010
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

II.A.3 Emergency Generator Engines 9-10
Fuel: Diesel
Maximum Engine Rating: Two (2) 4,060 hp engines
Model Year: 2014
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 2024
Page 6
II.A.4 Emergency Generator Engines 11-12
Fuel: Diesel
Maximum Engine Rating: One (1) 5,051 hp engine and one (1) 1,490 hp engine
Model Year: 2016
NSPS Applicability: Subpart IIII
MACT Applicability: Subpart ZZZZ

II.A.5
NEW
Emergency Fire Pump Engine - new
One (1) pump engine
Fuel: diesel
Maximum Engine Rating: 117 kW (157 hp)
Model Year: 2010
NSPS Applicability: Subpart IIII
MACT Applicability: 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 Facility-Wide Requirements
II.B.1.a The owner/operator shall only use diesel fuel (e.g. fuel oil #1, #2, or diesel fuel oil additives)
as fuel in the emergency engines. [R307-401-8]

II.B.1.b The owner/operator shall only combust diesel fuel that meets the definition of ultra-low sulfur
diesel (ULSD), which has a sulfur content of 15 ppm or less. [R307-401-8]

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

II.B.1.c
NEW
The owner/operator shall operate emergency generator engines for electric power-producing
operation, and emergency pump engine to run the water pump only during periods when
electric power from the public utilities is interrupted, or for maintenance and testing of the
emergency generator/pump engines and load systems. [R307-401-8]

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 2024
Page 7
II.B.1.d
NEW
The owner/operator shall not operate each emergency generator or pump engine

A. More than a total of 100 hours per rolling 12-month period for planned testing
and maintenance purposes, and

B. More than 52 days per rolling 12-month period for planned testing and
maintenance purposes.

[R307-401-8, R307-410-4]

II.B.1.d.1 To determine compliance with a rolling 12-month total, the owner/operator shall calculate a
new 12-month total by the 20th day of each month using data from the previous 12 months.
Records documenting the operation of each emergency engine shall be kept in a log and shall
include the following:

A. The date and time the emergency engine was used

B. The duration of operation in hours

C. The reason for the emergency-engine usage.

[R307-401-8]

II.B.1.e
NEW
The owner/operator may operate the emergency generator and pump engines for emergencies
including unplanned emergency maintenance and repairs. There is no time limit on the use of
the engines during the emergencies. [R307-401-8]

II.B.1.f To determine the duration of engine operations, the owner/operator shall install a non-
resettable hour meter for each emergency engine. [40 CFR 63 Subpart ZZZZ, R307-401-8]

II.B.1.g
NEW
The owner/operator shall not allow visible emissions from the emergency generator and pump
engines to exceed 20% opacity. [R307-401-8]

II.B.1.g.1 Opacity observations of emissions from stationary sources shall be conducted according to 40
CFR 60, Appendix A, Method 9. [R307-201-3]

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 2024
Page 8
PERMIT HISTORY

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

Supersedes AO DAQE-AN143300006-22 dated November 4, 2022
Incorporates NOI dated October 18, 2023
Incorporates Additional information dated October 25, 2023
Incorporates Additional information dated October 30, 2023
Incorporates DAQE-MN143300007-24 dated January 10, 2024

REVIEWER COMMENTS

1. Comment regarding emission calculations for the emergency fire pump engine:
The emergency fire pump engine, rated at 117 kW (157hp), will operate at 100 hrs per year for
testing and maintenance purposes. All criteria pollutants except for SO2 were calculated using the
Federal standards for emergency pump engines in Table 4 to NSPS Subpart IIII. SO2 and HAP
emissions were calculated using emission factors in AP-42 Section 3.3. [Last updated November 6,
2023]

2. Comment regarding NSPS and MACT Applicability:
NSPS Part 60 Subpart IIII applies to this source. The source operates stationary compression ignition
internal combustion engines that commenced construction after July 11, 2005, were manufactured
after April 1, 2006, or modified or reconstructed after July 11, 2005; therefore, NSPS Subpart IIII
applies.

MACT Part 63 Subpart ZZZZ applies to this source. This source operates stationary reciprocating
internal combustion engines at a major or area source of HAP emissions; therefore, MACT Subpart
ZZZZ applies. [Last updated October 24, 2023]

3. Comment regarding Title V Applicability:
Title V of the 1990 Clean Air Act (Title V) applies to the following:

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

This facility is not a major source and is not a Title IV source; however, the facility is subject to 40
CFR 60 NSPS Subpart A and IIII, and 40 CFR 63 MACT Subparts A and ZZZZ regulations. NSPS
Subpart IIII and MACT Subpart ZZZZ exempt sources from the obligation to obtain a permit under
40 CFR part 70 (Title V permit) if the source is not otherwise required by law to obtain a permit.
Therefore, the source is not subject to Title V requirements. [Last updated October 24, 2023]

Engineer Review N143300007: Oracle America, Inc. - Utah Computer Center
January 23, 2024
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 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-MN143300007-24

M E M O R A N D U M

TO: EQ He, NSR Engineer

FROM: Dave Prey, Air Quality Modeler

DATE: January 10, 2024

SUBJECT: Modeling Analysis Review for the Notice of Intent for Oracle America, Inc. –West
Jordan Data Center, Salt Lake County, Utah.
__________________________________________________________________________________________
This is not a Major Prevention of Significant Deterioration (PSD) Source.

I. OBJECTIVE
Oracle America, Inc. (Applicant) is seeking a modified approval order for their West Jordan Data
Center, located in Salt Lake County, Utah. This facility consists of a fleet of 12 diesel-fueled
emergency generators. Oracle America, Inc. has requested to add an emergency pump engine with
a maximum capacity of 117 kW (157 hp). The pump engine shall be allowed to operate up to 100
hours per year for testing and maintenance.

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 would be in compliance with 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

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

+ .
DP
DP
DAQE-MN143300007-24
Page 2
III. MODELING METHODOLOGY
A. Applicability

Emissions from the facility include PM10, NOx, CO, SO2, and HAPs. This modeling is part
of a modified approval order. The emission rate for NOx triggered an in-house modeling
review to demonstrate compliance with the NAAQS. Modeling was performed by the
UDAQ.

B. Assumptions

1. Topography/Terrain

The Plant is at an elevation 4985 feet with terrain features that have little effect on
concentration predictions.

a. Zone: 12

b. Approximate Location:

UTM (NAD83): 412204 meters East
4491302 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 that 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 years of off-site surface and upper air data were used in the analysis consisting of
the following:

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

DAQE-MN143300007-24
Page 3
6. Background
The background concentrations were based on Ozone and NO2 concentrations measured
in Herriman, Utah, revised to use hourly-seasonal data from 2019-21.

7. Receptor and Terrain Elevations

The modeling domain used 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.

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.

1. Air Pollutant Emission Rates

Source UTM Coordinates Modeled Emission Rates - Nox
Easting Northing 100% Load Ave. Load 0% Load (m) (m) (lb/hr) (tons/yr) hrs/year (lb/hr) (lb/hr)
STCK1 412204 4491302 6.00 0.30 100 1.08 0.53
STCK2 412204 4491308 6.00 0.30 100 1.08 0.53
STCK3 412205 4491314 6.00 0.30 100 1.08 0.53
STCK4 412206 4491321 6.00 0.30 100 1.08 0.53
STCK5 412207 4491334 6.00 0.30 100 1.08 0.53
STCK6 412208 4491341 6.00 0.30 100 1.08 0.53
STCK7 412209 4491346 6.00 0.30 100 1.08 0.53
STCK8 412210 4491353 6.00 0.30 100 1.08 0.53
STCK9 412202 4491257 6.72 0.34 100 3.75 0.59
STCK10 412200 4491251 6.72 0.34 100 3.75 0.59
STCK11 412195 4491241 6.76 0.34 100 3.77 0.59
STCK12 412206 4491205 1.75 0.09 100 0.98 0.15
OA_FPUMP 412203 4491281 0.96 0.05 100 NA NA
Total 70.94 3.55

DAQE-MN143300007-24
Page 4
10. Source Location and Parameters
Source Type Source Parameters
Elev, Ht Temp Flow Dia (ft) (m) (ft) (K) (m/s) (m)
STCK1 POINT 4976.0 4.9 16.0 763 51.21 0.46
STCK2 POINT 4976.0 4.9 16.0 763 51.21 0.46
STCK3 POINT 4976.0 4.9 16.0 763 51.21 0.46
STCK4 POINT 4976.0 4.9 16.0 763 51.21 0.46
STCK5 POINT 4976.0 4.9 16.0 763 51.21 0.46
STCK6 POINT 4976.0 4.9 16.0 763 51.21 0.46
STCK7 POINT 4976.0 4.9 16.0 763 51.21 0.46
STCK8 POINT 4976.0 4.9 16.0 763 51.21 0.46
STCK9 POINT 4976.0 6.5 21.3 729 96.10 0.36
STCK10 POINT 4976.0 6.5 21.3 729 96.10 0.36
STCK11 POINT 4976.0 5.1 16.9 714 107.48 0.36
STCK12 POINT 4976.0 4.1 13.4 709 90.92 0.20
OA_FPUMP POINT 4976.0 3.0 10.0 764 45.44 0.06

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
8.0 7.5 6.8 158.8 173.6 188 92.3%

V. PERMIT CONDITIONS

The following suggested permit language should be included under the Terms and Conditions in the
AO.

• Testing of each generator shall be allowed no more than 52 times per year.

DP:jg

Oracle America - Adding a new emergency pump engine
Engine Fuel: Diesel
Maximum engine rating:117 kW 157 hp
Annual operating hrs:100 hrs
Engine model year: 2010
NSPS Applicability:Subpart IIII
MACT Applicability:Subpart ZZZZ
PM 10 PM2.5 Nox*CO SO2 VOC*CO2 Total HAPs
mission factors 0.22 0.22 2.775 3.7 0.00205 0.225 1.15 0.000046
units g/hp-hr g/hp-hr g/hp-hr g/hp-hr lb/hp-hr g/hp-hr lb/hp-hr lb/hp-hr
sources Federal stds Federal stds Federal stds Federal stds AP-42, 3.3 Federal stds AP-42, 3.3 AP-42, 3.3
Emissions tpy 0.00 0.00 0.05 0.06 0.02 0.00 9 0.00
*VOC + Nox = 3.0 g/hp-hr; Nox = 92.5%, VOC = 7.5% based on AP-42 Section 3.3 emission factors
Federal stds = NSPS Subpart IIII Table 4
Page 1 of 1
Form 4 Company____________________________
Project Information Site ______________________________

Utah Division of Air Quality
New Source Review Section
Process Data - For Modification/Amendment ONLY
1. Permit Number_______________________________
If submitting a new permit, then use Form 3
Requested Changes
2. Name of process to be modified/added:
_______________________________

End product of this process:

_______________________________

3. Permit Change Type: New Increase*

Equipment

Process

Condition Change ____________________

Other ______________________________

Other ______________________________

Other ______________________________

4. Does new emission unit affect existing
permitted process limits?

Yes No
5. Condition(s) Changing:

6. Description of Permit/Process Change**

7. New or modified materials and quantities used in process. **
Material Quantity Annually

8. New or modified process emitting units **

Emitting Unit(s)

Capacity(s)

Manufacture Date(s)

*If the permit being modified does not include CO2e or PM2.5, the emissions need to be calculated and submitted to DAQ, which may result in an
emissions increase and a public comment period.
**If additional space is required, please generate a document to accommodate and attach to form.

Doc.uim:i'ii D^lc: 02/28/2018
DAQ 2018-002274