HomeMy WebLinkAbout20253342 CM.+ , COLORADO
4 "'Y' Department of Public
CDPHE Health&Environment
RECEIVED
Weld County - Clerk to the Board
DEG 0 8 2025
11500St
WELD COUNTY
COMMISSIONERS
PO Box 758
Greeley, CO 80632
December 8, 2025
To whom it may concern:
On December 8, 2025, the Air Pollution Control Division will begin a 30-day public notice
period for DCP Operating Company, LP - Enterprise 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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Air Pollution Control Division
4464C.AP Notice Of A Proposed Renewal Title V Operating Permit Warranting
CDPHE Public Comment
Website Title: DCP Operating Company, LP - Enterprise Compressor Station - Weld County
Notice Period Begins: December 8, 2025
Notice Period Ends: January 7, 2026
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: DCP Operating Company, LP
3026 4th Ave
Greeley, CO 80631
Facility: Enterprise Compressor Station
DCP Operating Company, LP has applied to renew the Operating Permit for the Enterprise
Compressor Station in Weld County, CO. The Enterprise Compressor Station is classified as a natural
gas compressor station as set forth under Standard Industrial Classification Code 1311 This facility
has a design natural gas throughput of 100 MMscfd and a stabilized condensate production rate of
202,848 bbl/year. The facility uses five (5) natural gas-fired internal combustion engines (AIRS 053,
055, 056, 070 and 071) to drive compressors to boost the inlet gas pressure from about 80 psig to
about 1,050 psig, facilitating the movement of natural gas into pipeline transit. These compressors
are periodically blown down for routine maintenance activities (AIRS 076).
The station also includes one (1) triethylene glycol (TEG) dehydration unit (AIRS 068) which
contacts "lean" TEG with the compressed natural gas stream to remove moisture. The "rich" TEG
mixture is regenerated in a still for reuse in the process. The TEG dehydration system operates
with a flash tank and a still vent. The flash tank emissions are routed back to the facility inlet using
a vapor recovery unit (VRU), which is permitted 5% downtime, during which emissions are routed to
an enclosed combustion device (COMB-1). The still vent stream is sent through a condenser to an
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enclosed combustion device (COMB-1, included under AIRS 068) where it is combusted. This
enclosed combustion device is permitted 1% downtime, during which still vent emissions are routed
to atmosphere. It should be noted that no emission control from the condenser is claimed for this
dehydration unit.
A condensate product is generated when the inlet gas is routed through the inlet scrubber and
liquids generated via pipeline transit are separated out. Two (2) 300 barrel produced water tanks
(AIRS 075) stores any water separated from the condensate stream. The emissions from these
produced water tanks are uncontrolled.
Emission control devices include: five (5) oxidation catalyst beds to control the compressor engine
exhaust emissions, one (1) vapor recovery unit (VRU) permitted 5% downtime to control the
dehydration unit flash tank emissions, one (1) enclosed combustion device (COMB-1) permitted 1%
downtime to control the dehydration unit still vent emissions, and permitted to control flash tank
emissions during VRU downtime (permitted 5%). This is the 4th renewal of this permit. The previous
Title V issuance for this facility also contained a stabilized condensate tanks (AIRS 063), a
stabilized condensate truck loadout point (AIRs 66), and an alternate TEG Dehydrator point (AIRs
077) to be constructed in the future. However, these points were cancelled as part of this renewal
action. Due to the cancellation of equipment with no other changes to the emissions, this renewal
represents a pure decrease in emissions. A copy of the application, including supplemental
information, the Division's analysis, and a draft of the Renewal Operating Permit 95OPWE103 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 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)
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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
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 §
70.8(a)(1) and 40 C.F.R. § 70.8(a)(1)(ii)).
45-Day EPA Review Period Start Date: December 9, 2025
45-Day EPA Review Period End Date: January 23, 2026
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