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CDPHE
COLORADO
Department of Public
Health & Environment
Weld County - Clerk to the Board
1150 O St
PO Box 758
Greeley, CO 80632
October 12, 2021
To Whom it May Concern:
RECEIVED
OCT 15 2021
WELD COUNTY
COMMISSIONERS
On October 13, 2021, the Air Pollution Control Division will begin a 30 -day public notice period for
Public Service Company of Colorado - Rocky Mountain Energy Center. A copy of this public notice is
enclosed.
Thank you for assisting the Division by posting a copy of this notice in your office. A public copy of
this notice is required by Colorado Air Quality Control Commission regulations. The notice must be
available for public inspection for a period of thirty (30) days from the beginning of the public notice
period. Please reference the public notice for instructions on submitting comments.
Enclosure
4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe
Jared Polis, Governor I Jill Hunsaker Ryan, MPH, Executive Director
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2021-2943
Air Pollution Control Division
Notice Of A Proposed Renewal Title V Operating Permit
Warranting Public Comment
Website Title: Public Service Company of Colorado - Rocky Mountain Energy Center - Weld County
Notice Period Begins: October 13, 2021
NOTICE is hereby given that an application to renew an Operating Permit has been submitted to the
Colorado Air Pollution Control Division, 4300 Cherry Creek Drive South, Denver, Colorado 80246-1530, for
the following source of air pollution:
Applicant: Public Service Company of Colorado
1800 Larimer Street
Suite 1300
Denver, CO 80202
Facility: Rocky Mountain Energy Center
6211 Weld County Road 51
Keenesburg, CO 80643
Public Service Company of Colorado has applied to renew the Operating Permit for the Rocky Mountain
Energy Center in Weld County, CO. This facility consists of two (2) combustion turbines, each equipped with
a heat recovery steam generator and a duct burner. Natural gas is the only fuel used in these turbines and
duct burners. These units are used to generate electricity. A minor modification application has been
incorporated into the renewal permit. The purpose of this modification is to make upgrades to all stages of
turbine blades and ring segments for Turbine 2, which will slightly lower the design heat input rate
(MMBtu/hr) for the unit. This project will be conducted during an outage in Spring 2022. There was no
increase in permitted emissions associated with this modification. A copy of the application, including
supplemental information, the Division's analysis, and a draft of the Renewal Operating Permit 05OPWE279
are available on the Division's website at https://www.colorado.gov/cdphe/air-permit-public-notices. The
Division has made a preliminary determination of approval of the application. Based on the information
submitted by the applicant, the Division has prepared the draft renewal operating permit for approval. Any
interested person may contact Jacqueline Joyce of the Division at 303-692-3267 to obtain additional
information. Any interested person may submit written comments to the Division concerning 1) the
sufficiency of the preliminary analysis, 2) whether the permit application should be approved or denied, 3)
the ability of the proposed activity to comply with applicable requirements, 4) the air quality impacts of,
alternatives to, and control technology required on the source or modification, and 5) any other appropriate
air quality considerations. Any interested person may submit a written request to the Division for a public
comment hearing before the Colorado Air Quality Control Commission (Commission) to receive comments
regarding the concerns listed above as well as the sufficiency of the preliminary analysis and whether the
Division should approve or deny the permit application. If requested, the hearing will be held before the
Commission within 60 days of its receipt of the request for a hearing unless a longer time period is agreed
upon by the Division and the applicant. The hearing request must: 1) identify the individual or group
requesting the hearing, 2) state his or her address and phone number, and 3) state the reason(s) for the
request, the manner in which the person is affected by the proceedings, and an explanation of why the
person's interests are not already adequately represented. The Division will receive and consider the written
public comments and requests for any hearing for thirty calendar days after the date of this Notice.
2.01 1 In
COLORADO
Department of Public
Health f# Environment
Comments may be submitted using the following options:
• Use the web form at https://www.colorado.gov/cdphe/air-permit-public-notices. This page also
includes guidance for public participation
• Send an email to cdphe.commentsapcd@state.co.us
• Send comments to our mailing address:
Jacqueline Joyce
Colorado Department of Public Health and Environment
4300 Cherry Creek Drive South, APCD-SS-B1
Denver, Colorado 80246-1530
Hearing requests may be submitted to the email address or the mailing address noted above.
2.01 2 I it
COLORADO
Department of Public
Health & Environment
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