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COLORADO
Department of Public
Health b Environment
Weld County - Clerk to the Board
11500 St
PO Box 758
Greeley, CO 80632
May 31, 2024
To Whom it May Concern:
RECEIVED
MAY 3 12024
WELD COUNTY
COMMISSIONERS
On May 31, 2024, the Air Pollution Control Division will begin a 30 -day public notice period for DCP
Midstream - Rocky Turbine Compressor Station. 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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`'4Notice Of A Proposed Title V Operating Permit Warranting
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Public Comment
Website Title: DCP Midstream - Rocky Turbine Compressor Station - Weld County
Notice Period Begins: May 31, 2024
NOTICE is hereby given that an Operating Permit application 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: DCP Midstream
370 17th Street, Suite 2500
Denver, CO 80202
Facility: Rocky Turbine Compressor Station
Sec 26, T6N, R63W
Weld, CO
DCP Midstream has applied for an Operating Permit for the Rocky Turbine Compressor Station in Weld
County, CO. The Rocky Turbine Compressor Station takes natural gas from surrounding sources and
compresses the gas to pipeline pressure. The incoming gas goes through an inlet slug catcher where liquids
are removed and sent to one (1) onsite pressurized bullet tank. The gas is then compressed via two (2)
natural gas fired compression turbines (IDs TURB-1, TURB-2), dehydrated via one (1) TEG dehydration unit
(ID D-1), and sent to a gas plant via pipeline for further processing. The overhead still vent emissions from
the TEG dehydrator (ID D-1) are routed to an enclosed combustor ("ECD"). The ECD is estimated to be down
one (1) percent of the time, during which the still vent emissions will be vented directly to the atmosphere.
The TEG dehydrator flash gas emissions are routed back to the inlet of the facility via a vapor recovery unit
("VRU"). The VRU is estimated to be down one (1) percent of the time. During VRU downtime, emissions
from the flash tank are routed to the ECD. The liquids are stored in a pressurized bullet tank and hauled
offsite via a pressurized truck loading rack (ID L-1). Produced water is stored in a 240 barrel ("bbl")
produced water sump tank (ID TK-0471). A copy of the application, including supplemental information, the
Division's analysis, and a draft of Operating Permit 21OPWE431 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 operating 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
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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 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 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 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.
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