DAQ-2024-007050

DAQE-GN101230058-24

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Eric Benson
HF Sinclair Woods Cross Refining LLC
1070 West 500 South
Woods Cross, UT 84087-1442
[e-mail]

Dear Mr. Benson:

RE: Request for Extension on Condition I.8 of Approval Order DAQE-AN101230057-23
Project Number: N101230058

The Utah Division of Air Quality (UDAQ) has received and reviewed your letter dated November 21,
2021, requesting an extension of the “18-month time frame to commence construction” on the project
authorized under Approval Order DAQE-AN101230057-23, which was issued on November 15, 2023.
That Approval Order (AO) is for updates to a previous AO (DAQE-101230053-22) which authorized the
construction and operation of various equipment changes at the facility. Following issuance of this most
recent AO, construction has not yet begun on three pieces of equipment, namely: II.A.107 – Tank 90,
II.A.108 – Tank 92, and II.A.151 – Tank 170.

The requirements found at R307-401-18, Eighteen Month Review, establish a review requirement for
Approval Orders (AOs). This requirement applies to all AOs we issue. On January 31, 2014, the EPA
issued a guidance memorandum which outlines “...what constitutes adequate justification for an extension
of the 18-month timeframe for commencing construction...” UDAQ has reviewed this guidance
memorandum and developed a guidance document dated March 25, 2014, that identifies the criteria the
UDAQ Director will use in a review of requests for extension of the 18-months to commence construction
requirement.

In your request of November 21, you provided details of the ongoing engineering and evaluation process.
Such factors are the precise justification discussed in the guidance memorandum and are therefore
acceptable to UDAQ. As this request for an extension was timely (within 18-months from issuance of the
AO) and using that memorandum as guidance, your request is approved with the following extension
requirements:

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

" / 2 / 6 Û Û Û Ù Û Ý
DAQE-GN101230058-24
Page 2

1. HF Sinclair Woods Cross Refining LLC is hereby granted an 18-month extension to commence
construction on AO DAQE-AN101230057-23.
2. By no later than May 15, 2025, HF Sinclair Woods Cross Refining LLC shall notify the Director
of the status of construction, installation, modification, relocation or establishment of the
equipment listed in section II.A of the AO.
3. This initial permit extension is not subject to public notice or comment, nor is any additional
review or permit analyses required, per the EPA and DAQ guidance identified above.

Any additional extension requests beyond the initial 18-month period shall be reviewed on a case-by-case
basis at the time of the request. At that time public notification and comment shall be required, along
with the associated re-analysis and update of PSD requirements or re-submittal of an application as may
be required.

The charge for the review done in making this change is a flat fee plus a filing fee as authorized by the
Utah Legislature. You will receive an invoice for these charges shortly. If you have any questions,
please contact John Jenks who can be reached at [phone] or [e-mail].

Sincerely,

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Bryce C. Bird
Director

BCB:JJ:jg
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DAQE-GN101230058-24

{{$d1 }}

Eric Benson
HF Sinclair Wood Cross Refining LLC
1070 W 500 S
Woods Cross, UT 84087-1442
[e-mail]

Dear Mr. Benson:

RE: Request for Extension on Condition I.8 of DAQE-AN101230057-23
Project Number: N101230058

The Utah Division of Air Quality (UDAQ) has received and reviewed your letter dated November 21,
2021, requesting an extension of the “18-month time frame to commence construction” on the project
authorized under DAQE-AN101230057-23, which was issued on November 15, 2023. That Approval
Order (AO) is for updates to a previous AO (DAQE-101230053-22) which authorized the construction
and operation of various equipment changes at the facility. Following issuance of this most recent AO,
construction has not yet begun on three pieces of equipment, namely: II.A.107 – Tank 90, II.A.108 –
Tank 92, and II.A.151 – Tank 170.

The requirements found at R307-401-18, Eighteen Month Review, establish a review requirement for
Approval Orders (AOs). This requirement applies to all AOs we issue. On January 31, 2014, the EPA
issued a guidance memorandum which outlines “...what constitutes adequate justification for an extension
of the 18-month timeframe for commencing construction....” UDAQ has reviewed this guidance
memorandum and developed a guidance document dated March 25, 2014 that identifies the criteria the
DAQ Director will use in a review of requests for extension of the 18-months to commence construction
requirement.

In your request of November 21, you provided details of the ongoing engineering and evaluation process.
Such factors are the precise justification discussed in the guidance memorandum and are therefore
acceptable to UDAQ. As this request for an extension was timely (within 18-months from issuance of the
AO) and using that memorandum as guidance, your request is approved with the following extension
requirements:

1. HF Sinclair Wood Cross Refining LLC is hereby granted an 18-month extension to commence
construction on DAQE-AN101230057-23.
2. By no later than May 15, 2025, HF Sinclair Wood Cross Refining LLCa shall notify the Director of
the status of construction, installation, modification, relocation or establishment of the equipment
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-GN101230058-24
Page 2
listed in section II.A of the AO.
3. This initial permit extension is not subject to public notice or comment, nor is any additional review
or permit analyses required, per the EPA and DAQ guidance identified above.

Any additional extension requests beyond the initial 18-month period shall be reviewed on a case-by-case
basis at the time of the request. At that time public notification and comment shall be required, along
with the associated re-analysis and update of PSD requirements or re-submittal of an application as may
be required.

The charge for the review done in making this change is a flat fee plus a filing fee as authorized by the
Utah Legislature. You will receive an invoice for these charges shortly. If you have any questions,
please contact John Jenks who can be reached at [phone] or [e-mail].

Sincerely,

{{$s }}

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