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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Introducing ALL4’s Ambient Group
Posted: March 5th, 2008
ALL4 is pleased to introduce the ALL4 Ambient Group. The Ambient Group performs two of ALL4’s existing services: (1) air quality dispersion modeling and (2) ambient & meteorological monitoring. The Ambient Group will focus on how these areas impact the permitting issues […]
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New Requirements for Emission Testing Firms
Posted: February 5th, 2008
On January 24, 2008, U.S. EPA promulgated revisions to Appendix A of 40 CFR 75 (Part 75). The revisions include the requirement for all Air Emission Testing Bodies (AETBs) that conduct Part 75 relative accuracy test audits (RATA) of continuous emission monitoring systems […]
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