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ICAC News: Breaking News

ICAC Releases Memo on 'Once in, Always in' Guidance

Wednesday, May 30, 2018  
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ICAC has developed a memorandum on the Trump Administration's rescission of the 'Once In, Always In' guidance for major sources under the Clean Air Act. The memorandum provides a summary of the background of the guidance, recent litigation and Congressional oversight, and the potential impact on the air pollution control and measurement industry.

Click here to view the memorandum (members only - must be logged-in to access).
The ICAC staff will continue to monitor any activity around the 'Once In, Always In' guidance and report out to the membership. For any questions, please contact Haley Armstrong (

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