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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 Proposes Overdue Refinery Air Rules

Posted: August 11th, 2014

The public comment period regarding the EPA’s revisions to MACT and NSPS Refinery Air Rules has been extended by 60 days.

U.S. EPA’s much anticipated revisions to the Maximum Achievable Control Technology (MACT) and New Source Performance Standards (NSPS) Refinery Air Rules… 

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Year 1 at ALL4

Posted: July 28th, 2014

Next week marks the completion of my first year at ALL4 (and my first year in the “real world”).  So far, I’ve been able to…

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U.S. EPA Defends Its Major Source Boiler MACT Floor Calculation Methodology

Posted: July 21st, 2014

Those of you following the saga of the Major Source Boiler MACT remand (see our March 17, 2014 and May 22, 2014 blogs for a refresher) will be interested to learn that latest milestone in the process occurred on July 14, 2014. Back in May 2014, the U.S. Environmental Protection Agency (U.S. EPA) was granted 60 days to provide further explanation to the U.S. Court of Appeals for the District of Columbia Circuit on the use of the upper prediction limit (UPL) statistical method to set the emission standards for certain subcategories in the Major Source Boiler MACT rule.

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