The gaseous nitrogen distribution system serving Birck Nanotechnology Center East Wing laboratories (10xx and 20xx) and Bindley Biosciences Center will be shut down from 8:00 AM to 11:00 AM on Tuesday, 4 December 2007, to correct two system issues, to add capacity, and to upgrade the system. This is the nitrogen gaseous distribution piping only; the liquid nitrogen system will remain operational. Thank you for your cooperation and patience during this shutdown Please call me if you have any issues or concerns. Regards, Mark Voorhis Building Manager Purdue University Birck Nanotechnology Center Office: (765) 494-3036 Cell: (765) 427-0475 John R. Weaver Facility Manager Birck Nanotechnology Center Purdue University (765) 494-5494 jrweaver@purdue.edu