PM2.5 Air Quality Modeling Updates
Posted: April 30th, 2013
There has been much activity over the past six (6) months that will impact how air quality modeling analyses will be conducted for Prevention of Significant Deterioration (PSD) permit applications with respect to particulate matter less than 2.5 microns (PM2.5). […]
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Major Source Boiler MACT Compliance with Oxygen Trim Systems
Posted: March 29th, 2013
The National Emission Standards for Hazardous Air Pollutants (NESHAP) for Major Sources: Industrial, Commercial, and Institutional Boilers and Process Heaters promulgated at 40 CFR Part 63, Subpart DDDDD, commonly referred to as the Major Source Boiler MACT (MSBM) standards, provide […]
Read articleArea Designations and Implementation of the Sulfur Dioxide National Ambient Air Quality Standard
Posted: February 22nd, 2013
On February 6, 2013, U.S. EPA issued a white paper outlining the agency’s updated strategy for completing initial area designations under the June 2010 1-hour primary sulfur dioxide (SO2)…
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DC Circuit Court Vacates and Remands PM2.5 SILs and SMC
Posted: February 7th, 2013
In a decision that could have far reaching permitting implications, the United States Court of Appeals for the District of Columbia Circuit (Court) on January 22, 2013 vacated and remanded portions…
Read articleLooks Like The Existing Lead NAAQS Is Good – For Now
Posted: January 30th, 2013
On January 11, 2013, U.S. EPA released a draft policy paper regarding the agency’s current outlook on the lead national ambient air quality standard (NAAQS). The Clean Air Act (CAA) requires…
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Looking Towards 2013 from a Consultant’s Perspective
Posted: December 28th, 2012
Here we are again at year’s end, another year older and wiser (hopefully). We made it through another election, the “fiscal cliff,” Hurricane Sandy, the Mayan end of the world, and the final episode of the Jersey Shore MTV series. […]
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Musings on Monitoring: The Who, What, When, Why, and How of Atmospheric Measurements
Posted: October 30th, 2012
The installation and operation of ambient pollutant and meteorological monitors has never traditionally been a part of the laundry list of environmental tasks at most facilities. Ambient monitoring installations by facilities have been limited to consent decrees and large Prevention […]
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How the SO2 NAAQS Came Crashing Down On Us
Posted: June 27th, 2012
The sulfur dioxide (SO2) landscape looked very different in 2008 than it does today. At that time, the annual, 24-hour, and 3-hour National Ambient Air Quality Standards (NAAQS) for SO2 had been in place for a long time. Except for […]
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SO2 NAAQS Stakeholder Workgroups: Party Like It’s 2010
Posted: May 29th, 2012
U.S. EPA has set the stage for 1-hour sulfur dioxide (SO2) NAAQS stakeholder workgroups to be held on May 30, May 31, and June 1, 2012.
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New Source Review Fine Particulate Matter PM10 Surrogate Policy Update
Posted: January 19th, 2012
Background PM2.5 became a regulated air pollutant in 1997 with the promulgation of the annual and 1-hour PM2.5 National Ambient Air Quality Standards (NAAQS). As a regulated pollutant under the Clean Air Act (CAA), U.S. EPA must enforce New Source […]
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