Dear BNC User, The scheduled preventative maintenance closure began this morning, and the cleanroom is now officially shut down. The facility is currently running in idle mode to allow skilled trades to safely service the air handlers and related supporting subsystems. During this time, card reader access is restricted to critical personnel only. We anticipate reopening the cleanroom on May 8. Thank you for your patience and cooperation during this maintenance week. Best regards, Dan Hosler Building Manager Birck Nanotechnology Center | Room 1214 Office: 765.496.3883 | Email: dhosler@purdue.edu