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COLORADO
Department of Public
Health b Environment
Weld County - Clerk to the Board
1150 0 St
PO Box 758
Greeley, CO 80632
April 28, 2025
To whom it may concern:
RECEIVED
APR 2 8 2025
WELD COUNTY
COMMISSIONERS
On April 28, 2025, the Air Pollution Control Division will begin a 30 -day public notice period
for Public Service Company - Yosemite Air Blend Plant. 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
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4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 CDPHE Website
Jared Polis, Governor I Jill Hunsaker Ryan, MPH, Executive Director
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1-11Z3IZ-5 2025-1144
Air Pollution Control Division
474'
Notice Of A Proposed Renewal Title V Operating Permit Warranting
Public Comment
Website Title: Public Service Company - Yosemite Air Blend Plant - Weld County
Notice Period Begins: April 28, 2025
Notice Period Ends: May 28, 2025
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
1800 Larimer St.
Suite 1300
Denver, CO 80202
Facility: Yosemite Air Blend Plant
Public Service Company has applied to renew the Operating Permit for the Yosemite Air Blend Plant
in Weld County, CO. This facility consists of six gas -fired air compressors used for compressed air
natural gas blending, under Standard Industrial Classification 4922. In addition, the other
significant emission units included in Section II of this permit include two emergency generators.
E001 and E002 were modified to lower the emission factors/emission limits for NOx in order to
comply with the requirements of Colorado Regulation No. 26, Part B, Section I.D.6. E003, E004,
E005, and E006 were modified to lower the emission factors/emission limits for NOx, CO, and/or
VOC in order to comply with the requirements of Colorado Regulation No. 26, Part B, Section I.D.5.
Each modification resulted in pure decreases of emissions for the facility for the modified criteria
pollutants. A copy of the application, including supplemental information, the Division's analysis,
and a draft of the Renewal Operating Permit 02OPWE247 are available on the Division's website.
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
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permit for approval. Any interested person may contact the Division at
cdphe_apcd_title_v@state.co.us 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.
Comments may be submitted using the following options:
• Use this web form. This page also includes guidance for public participation
• Send an email to cdphe apcd airpermitcomments@state.co.us
• Send comments to our mailing address:
Title V Operating Permits Unit
Colorado Department of Public Health and Environment
4300 Cherry Creek Drive South, APCD-SS-B1
Denver, Colorado 80246-1530
NOTE: Comments submitted to the Division will be uploaded to an online document repository and
will be accessible to the public. Your comments and the division's responses are not considered
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confidential and will be publicly accessible, including your name and any other personal
information you provide in your comments.
Hearing requests may be submitted to the email address or the mailing address noted above.
Note that the draft/proposed permit is subject to parallel EPA review (pursuant to 40 CFR S
70.8(a)(1) and 40 C.F.R. S 70.8(a)(1)(ii)).
45 -Day EPA Review Period Start Date: April 29, 2025
45 -Day EPA Review Period End Date: June 13, 2025
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