HomeMy WebLinkAbout20260299 C •r•:•N COLORADO
0 Department of Public
Health&Environment
Weld County - Clerk to the Board RECEIVED
1150 0 St
PO Box 758 FEB 0 9 2026
Greeley, CO 80632 WELD COUNTY
COMMISSIONERS
February 9, 2026
To Whom It May Concern:
On February 9, 2026, the Colorado Air Pollution Control Division will begin a 30-day
public comment period for Zen Midstream, LLC - Ren 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 comment period. Please reference the
public notice for instructions on submitting comments.
„ti co 4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.Qov/cdphe
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CJared Polls, Governor I Jill Hunsaker Ryan, MPH, Executive Director
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Air Pollution Control Division
GDPHE Notice of a Proposed Construction Permit Warranting Public Comment
Website Title: Zen Midstream, LLC - Ren Compressor Station - Weld County
Notice Period Begins: February 9, 2026
Notice is hereby given that an application for a proposed project or activity has been submitted to
the Colorado Air Pollution Control Division for the following source of air pollution:
Applicant: Zen Midstream, LLC
Facility: Ren Compressor Station
Natural Gas Compressor Station
SW1/4 quadrant of Section 33, Township 7N, Range 62W
Weld County
The proposed project or activity is as follows:
Zen Midstream, LLC (Zen) has submitted a permit application to construct a new compressor
station. This project includes the construction of six (6) new engines (application submitted on
1/8/2025) and one (1) new TEG gas dehydration unit (application submitted on 7/2/2025). All
engines are covered under GP02 and are not addressed in this public notice package.
Process description: Ren Compressor Station is a field gas gathering and compression station in
Weld County, CO. This new facility serves wellpads in the area via gas gathering pipelines. Gas
entering the station is compressed through 3 natural gas engine-driven compressors. The gas is then
dried to sales pipeline requirements via a glycol dehydration unit. Entrained liquids and compressor
drip liquids are collected under pressure and routed to a condensate treating vessel where it is
separated into condensate and water. Vapors leaving the treater are routed through the vapor
recovery compressor and returned to the gas inlet to the station. Vapors from compressor and
equipment blowdowns, as well as the dehy BTEX unit, are collected via vapor recovery blow and
routed to the vapor recovery compressor and returned to the gas inlet to the station. If all vapor
recovery units are down, vapor from the dehydrator compressor system is routed to an enclosed
combustion device. Condensate is routed to 2 pressurized condensate storage vessels. Vapors
CO 80246-1530 I P 303-692-2000 I www.colorado.gov/cdphe
4 ��9, Denver,4300 Cherry Creek Drive S.,
it-,( c-4 j°i Jared Polis, Governor I Jill Hunsaker Ryan, MPH, Executive Director
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collected from the pressurized storage vessels are routed to the vapor recovery compressor and
returned to the gas inlet to the station. Condensate leaves the site via LACT with a Coriolis flow
meter via a third-party oil sales line. Water is routed to two (2) 500 bbl produced water tanks.
Produced water leaves the site via produced water transfer pump with a magnetic or Coriolis flow
meter and goes to a third-party gathering pipeline. Initially generator power will be utilized but
once electrical grid power is available, it will be used on the site to power the control system, oil
LACT, produced water pump, VRUs, blowers, heat travel and lighting.
Major stationary source considerations: Zen is requesting emission limitations on the PTE of VOC in
order to avoid major stationary source requirements. As a result, the dehydration unit is subject to
a public notice period of 30 days.
The division has determined that this permitting action is subject to public comment requirements
under Colorado Air Quality Control Commission Regulation Number 3, Part B, Section III.0 due to
the following reason(s):
• This source is requesting a federally-enforceable limit on the potential to emit to avoid
other requirements. (Regulation Number 3, Part B, Section III.C.1.d.)
The division has made a preliminary determination of approval of the application.
A copy of the application, the division's analysis, and a draft of construction permit number
25WE0509 are available on the division website: Air Permit Public Notices
��o co�o9 4300 Cherry Creek Drive S., Denver, CO 80246-1530 I P 303-692-2000 I www.colorado.gov/cdphe
*. Jared Polis, Governor I Jill Hunsaker Ryan, MPH, Executive Director
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The division hereby solicits submission of public comments from any interested person concerning
the ability of the proposed project or activity to comply with the applicable standards and
regulations of the commission. The division will receive and consider written public comments for
thirty (30) calendar days after the date of this notice. Comments may be submitted using the
following options:
• Submit comments via web form: Form for Public Comment on Draft Permit
• Submit comments via email: cdphe_apcd airpermitcomments@state.co.us
• Submit comments via mail:
Air Pollution Control Division - Oil Ft Gas Unit
Colorado Department of Public Health and Environment
4300 Cherry Creek Drive South, APCD-SS-B1
Denver, CO 80246-1530
NOTE: Comments submitted to the division will be uploaded to an online document repository and
will be accessible to the public. Your comment(s) and the division's response(s) are not considered
confidential and will be publicly accessible, including your name and any other personal
information you provide in your comment(s).
aw°F-� 4300 Cherry Creek Drive S., Denver, CO 80246-1530 I P 303-692-2000 I www.colorado.gov/cdphe
* * 47 * Jared Polls, Governor I Jill Hunsaker Ryan, MPH, Executive Director
*/876*
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