The Ever-Evolving Science of Air Quality Modeling
Posted: June 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 […]
Read MoreUpcoming Changes to the Turbine MACT With a Short Timeline to Comply
Posted: April 2019
On Friday, April 12, 2019, U.S. EPA proposed changes to the National Emission Standards for Hazardous Air Pollutants for Stationary Combustion Turbines [40 CFR 63, Subpart YYYY (Turbine MACT)] as a result of its risk and technology review (RTR). This […]
Read MoreWhat Makes a “Good Neighbor?”: A Look at Ozone Standards
Posted: March 2019
Since the government shutdown ended and many Federal programs that were hanging in the balance have returned to service, the impact on U.S. EPA is beginning to show. Our CFO, Kevin Romito, recently published an article giving some insight into […]
Read MoreThe Green New Deal: What Is It, Really?
Posted: March 2019
On Thursday, February 7th, 2019, Rep. Alexandria Ocasio-Cortez (D-NY) introduced H.Res.109, a resolution calling for a “Green New Deal”. There are many articles and opinion pieces floating around about the Green New Deal, so I thought taking an objective look […]
Read MoreRepresenting MSS Emissions in the Emissions Inventory
Posted: March 2019
A good portion of the Texas refineries are taking a deep breath as the Refinery Sector Rule (RSR) compliance date is behind us, but the work isn’t over yet. The end of January means the environmental reporting season is upon […]
Read MoreLegacy Planning
Posted: January 2019
It is our job at ALL4 to deliver technical expertise to our clients. When complicated technical decisions need to be made that involve capital spending and regulatory liability, we need to weigh those variables and arrive at a conclusion that […]
Read More2019 Look Ahead – Year of Action
Posted: January 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 […]
Read MoreAmendments to the Guideline on Air Quality Models, Where Are We Now and Other Recent Updates
Posted: December 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 […]
Read MoreProject Emissions Accounting Under New Source Review Permitting
Posted: October 2018
In March of this year, the U.S. Environmental Protection Agency (U.S. EPA) issued a new interpretive policy memorandum concerning how emissions increases are to be determined in Step 1 of New Source Review (NSR) permitting. The NSR regulations include the […]
Read MoreSubpart MM for Pulp and Paper Mills – Worst Anniversary Gift Ever?
Posted: October 2018
October 11 is a memorable date for me because it’s my wedding anniversary – this year is especially memorable because it marks 10 years! But my 11th anniversary will be memorable for pulp and paper mills across the country, as […]
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