4 The record articles

4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.

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U.S. EPA Proposed 2015 Ozone NAAQS Implementation Rule

Posted: December 5th, 2016

On November 2, 2016, the United States Environmental Protection Agency (U.S. EPA) proposed an implementation of the 2015 National Ambient Air Quality Standard (NAAQS) for ozone (2015 ozone NAAQS) with requirements that would apply to states with…

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A New Take on Air Dispersion Modeling: Re-Entrainment Evaluations

Posted: December 1st, 2016

Facilities are typically introduced to the world of air dispersion modeling when they are required to demonstrate that a proposed project will not exceed regulatory thresholds, such as maximum allowable air toxics screening levels or the National Ambient Air Quality Standards…

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Check Your Mailbox: The Final ICR Is Here!

Posted: November 16th, 2016

On November 10, 2016, the U.S. Environmental Protection Agency (EPA) issued a final Information Collection Request (ICR) that will be used to obtain information from affected oil and natural gas operations to help them develop regulations to best reduce…

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