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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Latest News On The 1-Hour SO2 NAAQS Implementation Process
Posted: May 10th, 2012
On April 12, 2012, U.S. EPA’s assistant secretary Gina McCarthy recently sent letters to States outlining updates to the implementation procedures of the 1-hour sulfur dioxide (SO2) National Ambient Air Quality Standard (NAAQS). The major news
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Urgent – SO2 Implementation Update
Posted: April 20th, 2012
U.S. EPA has recently provided state air quality regulatory agencies with an update of the sulfur dioxide (SO2) 1-hour National Ambient Air Quality Standard (NAAQS) designation process. The significant news is that U.S. EPA will no longer require that air dispersion modeling for individual facilities
Read articleU.S. EPA Classifies Fracking Equipment as Non-Intermittent
Posted: April 5th, 2012
U.S. EPA has determined that emissions from drilling and well completion equipment at high-volume hydraulic fracturing (fracking) operations should not be considered intermittent emissions sources in relation to dispersion modeling for short-term…
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10th Conference on Air Quality Modeling
Posted: March 21st, 2012
ALL4 attended and presented at U.S. EPA’s 10th Conference on Air Quality Modeling in Research Triangle Park, NC March 13th through 15th. The purpose of the conference, mandated by Section 320 of the Clean Air Act, is to provide an […]
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SO2 NAAQS Implementation Update
Posted: January 31st, 2012
U.S. EPA is continuing to move forward with the sulfur dioxide (SO2) National Ambient Air Quality Standards (NAAQS) Implementation process. U.S. EPA released their “Guidance for 1-Hour SO2 NAAQS SIP Submissions” draft document on September 22, 2011.
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Not So Fast – Getting That Air Permit Won’t Be As Easy As You Think
Posted: January 18th, 2012
Introduction Most of the air regulations promulgated by U.S. EPA are developed and implemented to achieve compliance with the National Ambient Air Quality Standards (NAAQS). The NAAQS represent ambient air concentration levels that are established by U.S. EPA to ensure […]
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2011 and Beyond: The Critical Air Quality Issues Affecting Industry
Posted: January 18th, 2012
The December 2010 “year-end” edition of 4 The Record provides a look ahead into 2011. Even with the recent “Change in Climate” associated with the national political scene; we still see a very active U.S. EPA moving forward with their […]
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