April Showers Bring…Proposed Modeling Updates for 2015!
Posted: November 24th, 2014
If there’s one thing that the regulated community can agree on, it’s their concern over the challenges related to air quality modeling. Industry is all too familiar with the conservative modeling results for their proposed projects, which can trigger stricter emissions controls…
Read articleData Requirements Rule (DRR): An Update on the 1-Hour SO2 NAAQS
Posted: July 31st, 2014
Back in July 2010, the United States Environmental Protection Agency (U.S. EPA) published a final 1-hour sulfur dioxide (SO2) National Ambient Air Quality Standard (NAAQS)…
Read articlePrevention of Significant Deterioration (PSD) & the Major Modification
Posted: November 4th, 2013
|What is Major Modification|What is a Major Stationary Source?|Any Physical Change in or Change in the Method of Operation|Regulated NSR Pollutant|Significant Emissions Increase|Net Emissions Increase| The implementation at the state level of the major New Source Review (NSR) rules that […]
Read articleRecent Court Case Sets 1-Hour SO2 NAAQS and Air Quality Modeling Precedent
Posted: September 30th, 2013
The U.S. Court of Appeals for the Third Circuit Court recently upheld a U.S. EPA rule that established a sulfur dioxide (SO2) emission limit on a…
Read articlePM2.5 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). […]
Read articlePM2.5 Modeling Guidance Released by U.S. EPA
Posted: March 14th, 2013
On March 4, 2013 the U.S. EPA Office of Air Quality Planning and Standards (OAQPS) released “Draft Guidance for PM2.5 Permit Modeling” memorandum. The memorandum provides…
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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