4 The Record is a publication from ALL4’s team that takes an in-depth look at technical and regulatory topics.
PM2.5: Repeal and Reminder
Posted: June 25th, 2011
U.S. EPA has repealed the Prevention of Significant Deterioration (PSD) “Grandfathering” provision for particulate matter with an aerodynamic diameter of less than 2.5 microns (PM2.5). Facilities that submitted PSD construction permit applications prior to the promulgation of the PM2.5 New […]
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Marcellus Shale in New York – The Saga Continues
Posted: June 20th, 2011
While numerous drilling operations in Pennsylvania and West Virginia have begun to tap the vast natural gas resources in the Marcellus Shale formation during the past several years, New York has been, to put it mildly, reluctant to join the […]
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Compliance Alert
Posted: June 15th, 2011
ALL4 has observed a concerted increase in U.S. EPA compliance inspection activity at major source facilities in recent months. These inspections are not like your typical state compliance inspection and do not appear to be focused on a specific industry […]
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ALL4 Attends U.S. EPA Regional, State, and Local Dispersion Modelers Workshop
Posted: June 13th, 2011
ALL4’s ambient group members Dan Dix and Colin McCall attended the U.S EPA Regional, State, and Local Dispersion Modelers Workshop (Workshop) held in Atlanta, GA on June 9, 2011. The annual meeting, which is hosted by the U.S. EPA Office […]
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Boiler MACT…Yes…No…Maybe?
Posted: June 10th, 2011
Many questions surround the logic that U.S. EPA used to develop the emission limits contained in the Boiler MACT. One potential flaw identified by those petitioning U.S. EPA for judicial review of the Boiler MACT is the establishment of…
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Slade’s Corner – Avoiding Regulatory “Fatigue”
Posted: June 5th, 2011
It seems like there is a new air quality regulatory initiative being launched by U.S. EPA every week or so. From New Source Review (NSR) interpretations to greenhouse gas (GHG) programs to Maximum Achievable Control Technology (MACT), the litany of […]
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ALL4’s: Is That Your Final Answer?
Posted: May 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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Electronic Greenhouse Gas Reporting Tool (e-GGRT) Training and Testing Happening Now
Posted: May 19th, 2011
U.S. EPA has started to unveil the long-awaited Electronic Greenhouse Gas Reporting Tool (e-GGRT) to the user community. Throughout the month of May, individuals who will be required to use e-GGRT to report their facility’s greenhouse gas (GHG) emissions can […]
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Another Update to AERMOD!!
Posted: May 16th, 2011
On April 12, 2011 U.S. EPA’s Air Quality Modeling Group (AQMG) released another update to the AERMOD (now version 11103) air dispersion model on the Support Center for Regulatory…
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The Forgotten NAAQS
Posted: May 12th, 2011
With all of the excitement surrounding the implementation of the new 1-hour National Ambient Air Quality Standards (NAAQS) for sulfur dioxide (SO2) and nitrogen dioxide (NO2), it’s easy to forget that U.S. EPA is also in the process of reviewing […]
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