The Ever-Evolving Science of Air Quality Modeling
Posted: June 3rd, 2019
One of the reasons I’ve enjoyed air quality modeling during my 16-year career with ALL4 is because it’s an ever-evolving science. The air quality modeling that I was learning and conducting 16 years ago is vastly different than the air […]
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North Carolina Modeling Considerations
Posted: February 27th, 2019
In May and June 2018, North Carolina Department of Environmental Quality (NC DEQ) released various updates regarding air quality modeling for facilities located in North Carolina. The updates address the following topics. ♦ Modeling guidance for toxics -Guidance for quarries […]
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New “Once In, Always In” NESHAP Guidance Published by TCEQ
Posted: January 28th, 2019
The Texas Commission on Environmental Quality (TCEQ) air quality staff were very busy during the fourth quarter of 2018, rolling out several new tools and policies related to New Source Review permitting and air quality dispersion modeling. In the midst […]
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2019 Look Ahead – Year of Action
Posted: January 15th, 2019
A Year of Action // Colin McCall I know it’s cliché, but I could swear that I just wrote the introduction to our 2018 Look Ahead article a week or so ago! The good news is that I recall it […]
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Will a contract term come in to play with the Government Shutdown?
Posted: January 10th, 2019
As chief financial officer at ALL4, I oversee the financial operations of the company and minimize risk when possible. As a part of my role, I review contracts and assess the risk included in the contract language. A common contractual […]
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Amendments to the Guideline on Air Quality Models, Where Are We Now and Other Recent Updates
Posted: December 10th, 2018
We’ve been living with the amendments to 40 CFR Part 51 Appendix W – Guideline on Air Quality Models (The Guideline) for a little over a year and a half now so I thought it would be a good time […]
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U.S. EPA Releases Draft Guidance on “Ambient Air”
Posted: December 3rd, 2018
If you howl at the moon long enough, eventually you will capture someone’s attention. When you are trying to get the attention of others to cause change, you might find the length of howling and the volume of your howl […]
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TCEQ Unveils New Tool to Streamline Air Quality Modeling
Posted: November 19th, 2018
A theme of the Texas Commission on Environmental Quality (TCEQ) Autumn Conference (Conference) held on October 9th and 10th was the introduction of air permitting “tools” designed to streamline the air permitting process for both TCEQ and permit applicants. These […]
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TCEQ Air Quality 101 Blog Series – Back to School Edition
Posted: October 5th, 2018
TCEQ Updates: New Chairman, Modeling and Effects Review Applicability (MERA), and Effect Screening Levels (ESL) With summer having come to a close and students heading back to the classroom, it’s an appropriate time to do some fall refreshing and reflecting. […]
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Posted: January 17th, 2018
The Air and Waste Management Association (A&WMA), in collaboration with the American Society of Mechanical Engineers (ASME), hosted an information exchange in Durham, NC. The information exchange was held mid-December 2017, with the purpose of allowing…
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