The recent decision in Sierra Club v. EPA, 705 F.3d 458 (D.C. Cir. 2013) vacated all of EPA's rules on Significant Monitoring Concentrations ("SMCs"), as well as some (the Prevention of Significant Deterioration ("PSD") portion) of the Significant Impact Levels ("SILs") for Particulate Matter in air emissions measuring 2.5 micrometers in diameter or smaller ("PM2.5"). As a result permit applicants have fewer screening tools available when seeking exemption from analysis and monitoring requirements under the Clean Air Act ("Act").
We use cookies and other tracking mechanisms to improve your website experience, provide additional security, and remember you when you return to the website. This website does not respond to "Do Not Track" signals. By clicking "Accept," you agree to our use of cookies. By using our website, you agree to ourPrivacy Policy.
Cookie Preference Center
Necessary Cookies
Always Active
Necessary cookies enable core functionality such as security, network management, and accessibility. These cookies may only be disabled by changing your browser settings, but this may affect how the website functions.
Analytical Cookies
Analytical cookies help us improve our website by collecting and reporting information on its usage. We access and process information from these cookies at an aggregate level.
