4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.
U.S. EPA Provides SO2 NAAQS “Implementation” Guidance
Posted: April 4th, 2011
On March 25, 2011, U.S. EPA released guidance on the implementation process for the 1-hour sulfur dioxide (SO2) National Ambient Air Quality Standard (NAAQS). The 1-hour SO2 NAAQS was promulgated in June 2010. As part of the NAAQS implementation process, […]
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ALL4’s: Is That Your Final Answer?
Posted: March 29th, 2011
Test your knowledge across the environmental field, on the building blocks of air quality rules, on ALL4 general trivia, and challenge you with brain teasers that have perplexed us…Take on ALL4’s Is That Your Final Answer?
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Source Specific Ambient SO2 Monitoring vs. Air Quality Modeling for 1-Hour SO2 NAAQS Designations
Posted: March 26th, 2011
As part of the preamble of the new 1-hour sulfur dioxide (SO2) National Ambient Air Quality Standard (NAAQS), U.S. EPA outlined new NAAQS implementation procedures that will require certain facilities to be evaluated using refined air dispersion modeling with U.S. […]
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Pennsylvania Plan Approval Expiration Date/Duration Revisions
Posted: March 23rd, 2011
Facilities in Pennsylvania should be aware of a recent change in the interpretation of standard Plan Approval (i.e., construction permit) language regarding Plan Approval duration and “shakedown” periods. The change impacts the temporary operation of a new, or newly modified, […]
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Relief! U.S. EPA Announces Extension of 2010 Greenhouse Gas Report Filing Deadline
Posted: March 22nd, 2011
On March 1, 2011, U.S. EPA announced that the original March 31, 2011 deadline for 2010 greenhouse gas (GHG) emissions reporting under 40 CFR Part 98 (Mandatory Reporting of Greenhouse Gases Rule) would be extended. U.S. EPA’s announcement did not indicate how […]
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They’re Here!
Posted: March 14th, 2011
On February 23, 2011 U.S. EPA released on their website pre-publication versions of four (4) new rules that are all interrelated and that will affect boilers and process heaters everywhere. The rules will reduce emissions of toxic air pollutants from […]
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What’s a Solid Waste? U.S. EPA Finalizes the Definition of Solid Waste (DSW) Rule
Posted: March 6th, 2011
The final Definition of Solid Waste (DSW) rule was signed by U.S. EPA on February 21, 2011 and is expected to be published in the Federal Register in March 2011. The purpose of the DSW rule is to clarify which […]
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ALL4’s: Is That Your Final Answer?
Posted: February 28th, 2011
Test your knowledge across the environmental field, on the building blocks of air quality rules, on ALL4 general trivia, and challenge you with brain teasers that have perplexed us…Take on ALL4’s Is That Your Final Answer?
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A Sign of Change?
Posted: February 23rd, 2011
First, U.S. EPA decides to reverse decades of past practice and experience of using a policy that the Prevention of Significant Deterioration (PSD) permit application date was the cut-off for new applicable requirements for the source. Then they add new, […]
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U.S. EPA Says No to CO NAAQS Revision
Posted: February 18th, 2011
U.S. EPA has proposed to retain the National Ambient Air Quality Standards (NAAQS) for carbon monoxide (CO) after a review of the most current scientific data for…
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