AWMA- RMSS-AWMA lunch meeting on Thursday, September 16 from 12:00 PM-1:00 PM (in person with virtual option)

Please join us for our first IN-PERSON AWMA lunch meeting in a long, long time.  Christy Woodward of the Colorado Oil and Gas Association will be talking about “Air Quality – What’s Happening in the Oil & Gas Industry.”  The meeting is going to be an IN-PERSON meeting (with a virtual option).  Again, just in case you missed it, the meeting will be held IN-PERSON, from 12PM-1PM, on Thursday, September 16th, at Liberty Oilfield Services (950 17th Street, Suite 2400). Please check in on the 24th floor and then proceed to the conference room on the 23rd floor. Lunch will be provided if you RSVP that you are going to attend IN-PERSON.

If you plan to attend this meeting (IN-PERSON or virtually), please RSVP to Ty Smith ( ) by 11AM on Wednesday, September 15th.  State in your email if you are going to be IN-PERSON or virtual.  If you attend virtually, we’ll send you a link to join.  If you are going to attend IN-PERSON, we’ll buy you lunch!

Let’s all get together and say Hi on Thursday!  Remember, the RMSS-AWMA 2021 Air Quality Conference will be IN-PERSON and held on October 7, 2021 at the Denver West Marriott.  Get registered now by going to  and click on “Buy Tickets.”


Air quality needs have been and will continue to change in Colorado.  Come listen to Christy Woodward of the Colorado Oil and Gas Association talk about upcoming regulatory changes for the December GHG rulemaking coupled with the Colorado Emission Inventory.

Presenter’s Bio:

Ms. Woodward has 22 years’ experience in civil and environmental engineering design and project management, including air and water quality permitting, National Pollution Discharge Elimination System (NPDES) permitting and compliance and National Environmental Policy Act (NEPA) assessments.  She is an Environmental Engineer and has provided technical support for the oil and gas industry, the homebuilding industry, mining industry, other private clients, U.S. Environmental Protection Agency (EPA), and the Department of Defense (DoD).  Ms. Woodward provided technical design skills, report writing, and project management for a wide-ranging environmental health and safety projects.  Her technical experience includes rulemaking, litigation, waste rock characterization, regulatory compliance, permitting, and agency negotiation; planning and implementation of surface and subsurface investigations and remedial evaluations; remedial design and implementation; design and implementation of hydrogeological, hydrological, and sedimentation studies; watershed management projects; and stormwater control projects.  In addition, Ms. Woodward has facilitated and led teams of air engineers, legal counsel and environmental health and safety professionals through rulemaking and compliance assistance during her 22-year career.

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The AWMA Rocky Mountain States Section Air Quality Conference will take place October 7, 2021.  We look forward to hosting you in-person and are committed to providing a safe, relevant, and educational conference. To register, please visit the registration section of the Air Quality Conference webpage.

Thank you to our conference sponsors! If you or your company is interested in being a conference sponsor, please  contact Ty Smith at for more information about sponsorship levels and benefits.

Please find the preliminary program here.

Thanks to our Sponsors!
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2021 Colorado Science and Engineering Fair Special Awards Press Release

The Air & Waste Management Association Rocky Mountain States Section is proud to announce the winners of the Air & Waste Management Awards for 2021

Jai’Lee Keever-Espinoza 7th grade
$50, certificate
Pueblo Charter School for the
Arts & Sciences Pueblo
Recycle Capsule

Alexander Zhang 8th grade
$100, certificate
Summit Middle Charter School Boulder
Carbon Capture: Refining the Process

Rachel Christensen 12th grade
$50, certificate
Evergreen High School Evergreen
The Environmental Effect on Aquatic Ecosystems of
Run-Off from Wildfires Where Fire Retardant
Slurry Was Used

Gitanjali Rao 10th grade
$100, certificate
STEM School Highlands Ranch
Detection of C. parvum Transposons in Potable
Water Using Genetically Engineered Bioelectric

See full press release here.

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CALL FOR ABSTRACTS – October 7, 2021 Air Quality Conference in Denver

The Rocky Mountain States Section – Air & Waste Management Association (RMSS-A&WMA) is hosting a one-day Air Quality Technical Conference at the Denver Marriott West, 1717 Denver West Blvd., Golden, Colorado (located on the North side of I-70 at Exit 273) on Thursday, October 7, 2021.  The focus of this conference is on current and future air quality issues affecting the Rocky Mountain Region and may include emerging regulatory and policy trends.  This will be the 7th Air Quality Conference hosted by the  RMSS-A&WMA in the past 15 years.    

RMSS-AWMA is hereby issuing a Call for Abstracts for the October 2021 conference.  The time allotted for each presentation is 15 minutes with an additional 5 minutes allocated for questions and answers.  The Abstract Submittal Deadline and Submittal Package requirements are listed below:

1.      Abstracts will be accepted through Monday, May 3, 2021.
2.      Authors who previously submitted abstracts for the original RMSS 2020 conference are welcome to resubmit updated presentations for reconsideration by the Technical Conference Content Committee.
3.      Abstracts shall be approximately 150 words and the submittal package shall include:
A.      Title
B.      Author(s)
C.      Affiliation
D.     Author(s) contact information (e-mail and telephone number)
E.      Brief bio of the author(s) – about 100 words
4.      Topics of Interest as they affect the Rocky Mountain Region :
a.      Air Quality Permitting, Compliance and Enforcement Trends (Local, State and Federal)
b.      Climate Change in the Rocky Mountain Region/Western US
c.       Air Quality Monitoring
d.      Air Quality Modeling (Federal or State guideline revisions, advancements in model development, etc.)
e.      Industry-Specific Air Quality Issues (Emission Controls, Utilities, Transportation, Oil and Gas, Refineries, etc.)  
f.        Air Quality Rule Changes (Ozone Non-Attainment Area Designation changes, impact on permitting, etc.)
g.       Air Toxics 
h.      Air Quality Evaluations under NEPA
i.        Air Quality Impacts and Health (pandemic concerns, increased wildfire smoke events, etc.)
5.      Send your abstract and bio electronically by Monday, May 3, 2021 to: 

Peg Young, Technical Conference Content Committee, RMSS-AWMA


Questions:  Call (720) 320-4839

Abstracts will be selected by Wednesday, June 30, 2021.  All those submitting abstracts will be notified shortly thereafter. Please ensure your complete contact information is enclosed with your submittal.

Thank you for your interest in participating in this conference.

Link to PDF

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AWMA- RMSS-AWMA lunch meeting on Friday, December 18 from 12:00 PM-1:00 PM

Please join us for our next virtual AWMA lunch meeting, where Keith Hay, the Director of Policy at the Colorado Energy Office, will provide an update on the GHG Pollution Reduction Roadmap and the implementation of near-term actions to make progress toward the 2025 and 2030 goals.

The meeting will be heldonline via Microsoft Teams, from 12PM-1PM, on Friday, December 18th

If you plan to attend this meeting, please RSVP to Sara Nuttall ( ) by 5PM on Thursday, December 17th to receive instructions on how to attend online.

In 2019, Colorado adopted science-based goals of reducing greenhouse gas pollution reduction goals of 26% by 2025 and 50% by 2030 from a 2005 baseline. To make progress toward those goals, Governor Polis directed state agencies to work together to develop a GHG Roadmap Reduction Roadmap that would assess the sources of pollution and outline actions the state can take. The presentation will cover the key findings of the Roadmap, discuss the action steps the state can take, and provide an update on the legislative and regulatory agenda.

Presenter’s Bio:
Keith Hay is the Director of Policy at the Colorado Energy Office where he leads a team developing legislative policies and strategies and regulatory policies to increase the use of clean energy, energy efficiency, electric vehicles, and beneficial electrification to reduce greenhouse gas emissions. Prior to joining the Energy Office, Keith worked at the Colorado Public Utilities Commission (PUC), including as an Advisor to the commissioners where he worked on resource planning, renewable energy plans, and rate cases. Prior to advising, Keith was a member of the PUC’s Research section where he led investigations into electric vehicle integration, rate design, and new approaches to regulation. When not working, Keith enjoys skiing, climbing, and generally spending time in the mountains with his family.

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AWMA- RMSS-AWMA lunch meeting on Thursday, October 29 from 12:00 PM-1:00 PM

Please join us for our next virtual AWMA lunch meeting, where we will discuss “Bringing the the Denver Metro and North Front Range Area into compliance with the federal ozone standards”

The meeting will be held online via Microsoft Teams, from 12PM-1PM, on Thursday, October 29th

f you plan to attend this meeting, please RSVP to Sergio Guerra ( by 11AM on Wednesday, October 28th  to receive instructions on how to attend online.

The Environmental Protection Agency (EPA) recently reclassified the Denver Metro and North Front Range Area’s nonattainment status for ozone from Moderate to Serious. The Regional Air Quality Council (RAQC), in coordination with the Colorado Air Pollution Control Division (APCD) of the Colorado Department of Public Health and Environment (CDPHE), has developed a State Implementation Plan (SIP) aimed at bringing the area into compliance with the federal ozone standards. Amanda Brimmer and Jessica Ferko of the RAQC will be discussing the development of this plan including, photochemical modeling, emissions inventories, and control strategy evaluation, as well as the approval and submittal  process the plan is currently undergoing.

Presenters Bios
Amanda Brimmer is the Technical Director of the Regional Air Quality Council (RAQC). In this role, Amanda facilitates development of the State Implementation Plan (SIP) for ozone for the Denver Metro/North Front Range nonattainment area as well as managing other air quality planning activities including providing technical direction and support for Council activities.  Prior to joining the RAQC, Amanda was a Principal Air Quality Planner with the North Central Texas Council of Governments in Arlington, TX.  Amanda graduated from Colorado State University with a bachelor’s degree in Mechanical Engineering and earned a master’s degree in Civil/Environmental Engineering from the University of Texas, Arlington.  Outside of work, Amanda enjoys hiking, reading, and spending time with her two daughters.

Jessica Ferko is an Air Quality Planner for the Regional Air Quality Council. She has seven years’ experience working in the air quality field, and uses her experience to perform specialized work in air quality planning, control strategy evaluation, and stakeholder engagement. Prior to joining the team at the RAQC, Jessica worked in consulting; focusing on environmental permitting and air dispersion modeling. Jessica graduated from Kalamazoo College with a degree in Chemistry, and Michigan State University with a degree in Chemical Engineering. When not working, Jessica spends her time climbing rocks, riding bikes, and puttering in her garden.

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AWMA- RMSS-AWMA lunch meeting on Wednesday, September 16 from 12:00 PM-1:00 PM

Please join us for our next virtual AWMA lunch meeting, where we will discuss “What’s new with Building Downwash in AERMOD?”

The meeting will be heldonline via Microsoft Teams, from 12PM-1PM, on Wednesday, September 16th

If you plan to attend this meeting, please RSVP to Bethany Moffat ( by 11AM on Tuesday, September 15th  to receive instructions on how to attend online.


At the 11th Conference on Air Quality Modeling, Petersen and Guerra (2016) documented several theoretical flaws in PRIME (the building downwash formulation in AERMOD) that likely account for the model overprediction tendency for certain building configurations.  Based on this initial work, an industry funded research study was initiated in late 2016 with the following overall objectives: 1) correct the known problems in the theory; 2) incorporate and advance the current state of science; 3) expand the types of structures that can be accurately handled (e.g., streamlined, porous, long, wide); 4) properly document and verify the model formulation and code for the updated PRIME (referred to as PRIME2); and 5) collaborate with EPA to work toward implementing the improved model. This talk will summarize this ongoing multi-year research project which has led to peer-reviewed journal articles and the inclusion of new research-grade alpha building downwash options in AERMOD_v19191. The alpha building downwash options are enabled by the following keywords: ORD_DWNW and AWMA_DWNW. The first option is based on research led by the EPA’s Office of Research and Development (ORD) and the second is based on the PRIME2 research effort funded by an industry group and reviewed by AWMA’s APM committee. Both options have been evaluated against field observations and the recent comparisons with field observations have shown that PRIME2 has better agreement with field observations than the current regulatory version of AERMOD. The model evaluation includes the standard EPA databases (Bowline Point and Alaska North Slope) as well as a new PRCI database for a Gas Compressor Station. Ron and Sergio will talk also about EPA’s potential plans regarding including these improvements in future AERMOD releases.

Presenters Bios:

Dr. Ron Petersen is a Certified Consulting Meteorologist and an ASHRAE Fellow with over 40 years of experience using state-of-the-art research findings and wind tunnel modeling to find creative solutions for air quality problems. Ron is currently the President of Petersen Research and Consulting. After 35 years at CPP, Inc., he retired in late 2018 where Ron was a Principal and one of the three founders. CPP provides industry-leading air quality and wind consulting services to architects, industry, and developers around the world. Ron still consults with CPP and they are currently working together on a research project for BOEM to help develop improved dispersion algorithms for off-shore oil and gas platforms and drilling rigs so the OCD model can be replaced by AERMOD. Ron has been an active member of the Atmospheric Modeling and Meteorology Committee (APM) of the A&WMA for over 40 years and has published several peered-reviewed papers on complex dispersion problems for Atmospheric Environment, JAWMA, and JWEIA.

Dr. Sergio Guerra is a Senior Environmental Engineer at GHD with over 18 years of experience in Air Quality. Sergio’s expertise in research, regulations, and consulting gives him a unique insight into the interaction of the theoretical and practical aspects of air quality.  This experience is at the core of his interest in advanced methods to achieve accurate results from regulatory tools such as AERMOD. Dr. Guerra delivers presentations about his research at local and national forums of technical and non-technical audiences. His research has been published in peer reviewed journals such as the EM Magazine, the Journal of Air and Waste Management Association and other conference proceedings. Sergio holds a Ph.D. in Environmental Engineering from the University of Kansas and currently serves as the Chair of the Atmospheric Modeling and Meteorology Committee (APM) of the A&WMA- one of the most influential technical committees in dispersion modeling.

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AWMA- RMSS-AWMA lunch meeting on Thursday, August 20 from 12:00 PM-1:00 PM

Please join us for our next virtual AWMA lunch meeting, where we will discuss “Compliance Program Development for Title V Facilities in the Serious Nonattainment Area.”

The meeting will be heldonline via Microsoft Teams, from 12PM-1PM, on Thursday, August 20th

If you plan to attend this meeting, please RSVP to Lori Marquez ( by 11AM on Thursday, August 20th  to receive instructions on how to attend online.Everyone who has already RSVP’d should have received a confirmation and link to the meeting. If you did not receive this confirmation, please email Lori Marquez at to have her resend the link.


The Denver/Metro North Front Range was designated as a “serious” nonattainment area for ozone in December 2019, which changed the threshold for “major sources” as defined in the Title V regulations from 100 tpy to 50 tpy for NOx and VOC emissions. The change in the major source threshold has resulted in many facilities becoming newly subject and required to submit an initial Title V application within 12 months of the designation. This presentation will provide an overview of the Title V program that will inform facilities both old and new to the program. We will address the development and maintenance of a compliance program supporting the monitoring, recordkeeping, and reporting requirements associated with all Title V permits.  Requirements and best practices will be reviewed for the initial operating permit applications for new major sources, as well as for renewal applications and modifications. Facilities new to the program, and those considering synthetic minor permitting to avoid the program, will gain a better understanding of the risks and resources necessary to comply with a Title V permit.

Presenters’ Bios:

Dawn Meyers is a Senior Air Quality Consultant with Barr Engineering Co. She has nearly 25 years of experience and expertise across gathering, transmission, and processing for the oil and gas industry. She worked for one of the largest energy companies in North America for over 20 years, where she was responsible for air quality permitting and compliance. Dawn was appointed by the governor to serve on the Colorado Air Quality Control Commission for a three-year term in 2009.  Dawn has a bachelor’s degree in Chemical Engineering and a minor in Environmental Engineering from Colorado State University.

Tony Widboom is a Vice President and Senior Environmental Engineer with Barr Engineering Co. with 14 years of experience. His expertise lies in air quality permitting and compliance for a variety of industries, including petroleum refineries, manufacturing, mining, and power generation. Tony has significant experience working on Title V permit applications across the country, including for facilities subject as a result of a change in attainment designation. He joined Barr with a bachelor’s degree in chemical engineering from the University of Minnesota.

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AWMA- RMSS-AWMA lunch meeting on Wednesday, July 22 from 12:00 PM-1:00 PM

Please join us for our next virtual AWMA lunch meeting, where we will hear from Megan DeMasters, a specialist in air quality programs within the Environmental Services Department at the City of Fort Collins.

A changing climate is expected to increase the risk of local and regional wildfires, which can affect air quality. Given the risk of wildfires in our area, Fort Collins is assessing what it means to be a Smoke Ready Community. Megan’s presentation will include:

• Definition of what it means to be a smoke-ready community
• Overview of programs and plans to increase smoke-readiness in Fort Collins including:
– Education and outreach materials prepared
– Collaborative partnerships
– Next steps in becoming a smoke-ready community
• The presentation will also include some lessons learned from COVID-19 as they relate to wildfire smoke preparedness.

The meeting will be held online via Microsoft Teams, from 12PM-1PM, on Wednesday, July 22nd

If you plan to attend this meeting, please RSVP to Ginger Fast ( ) by 11AM on Wednesday, July 22nd  to receive instructions on how to attend online.

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AWMA- RMSS-AWMA lunch meeting on Tuesday, June 11 from 12:00 PM-1:00 PM

Our speaker for this meeting is John Putnam, Director of Environmental Programs at CDPHE.

John will discuss Per- and Polyfluoroalkl Substance issues in the State of Colorado.  This includes the current regulatory status of the family of PFAS chemicals, recent legislation and the Colorado Department of Public Health and Environment Action Plan for PFAS.

The meeting will be held online via Microsoft Teams, from 12PM-1PM, on Thursday, June 11th

If you plan to attend this meeting, please RSVP to Garrett Clemons ( by 11AM on Wednesday, June 10 to receive instructions on how to attend online.

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