From:	Jeremy Martin <JMartin@ucsusa.org>
To:	Dallas Burkholder/AA/USEPA/US@EPA
Date:	09/03/2012 10:40 AM
Subject:	Extension request on EPA-HQ-OAR-2012-0632



Dear Mr. Burkholder,
 
I would like to request an extension to the public comment period for the waiver request (EPA - HQ - OAR - 2012 - 0632).  I need more time to develop analysis and comments on this matter.  Please let me know if any additional information is requested.  
 
Regards,
 
Jeremy
 
Jeremy I. Martin, Ph.D., Senior Scientist
Clean Vehicles Program, Union of Concerned Scientists
1825 K Street NW, Suite 800, Washington DC 20006-1232
(202) 331-6946 

