4 The record articles

4 The Record is a publication of ALL4's RegTech Group that contains an in-depth look at hot technical and regulatory topics.


U.S. EPA Finalizes Flexible Permit Rule (Again)

Posted: October 26th, 2009

On October 6, 2009, U.S. EPA finalized a flexible permitting rule that was initially proposed on September 12, 2007 (see our February 2008 4 The Record article for an analysis of the proposed rule).  The rule was previously finalized on January 13, 2009, […]

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U.S. EPA’s Final PM2.5 Designations

Posted: October 6th, 2009

U.S. EPA has promulgated the final nonattainment area designations for the 24-hour National Ambient Air Quality Standard (NAAQS) for particulate matter with an aerodynamic diameter of less than 2.5 microns (PM2.5).  PM2.5 is a regulated air pollutant with annual and […]

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Proposed Revision to NO2 NAAQS Could Pose Problems Under PSD

Posted: August 23rd, 2009

In the July 2009 issue of 4 The Record, ALL4 included a summary of U.S. EPA’s announcement concerning a proposed new short-term (1-hour) National Ambient Air Quality Standard (NAAQS) for nitrogen dioxide (NO2).  The proposed standard will likely range between 150 µg/m3 and 188 µg/m3.  […]

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Update: PM2.5 New Source Review Regulations

Posted: August 18th, 2009

On May 16, 2008 U.S. EPA issued a final rule amending the New Source Review (NSR) regulations to add requirements related to particulate matter with an aerodynamic diameter of less than 2.5 microns (PM2.5).  ALL4’s PM2.5 Team published 4 The Record articles […]

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U.S. EPA Proposes Ozone Season Extension

Posted: August 14th, 2009

On July 16, 2009, U.S. EPA proposed revisions to its ambient ozone (O3) monitoring network design requirements.  The revisions are in response to the amended primary and secondary National Ambient Air Quality Standards (NAAQS) for O3 that were promulgated on […]

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