Dear BNC Users, The cleanroom general exhaust interruption is complete. Thank you, Mark Voorhis Building Manager Birck Nanotechnology Center Office: 765-494-3036 From: Voorhis, Mark L. Sent: Monday, March 31, 2025 1:23 PM To: bnc-facility-notice@ecn.purdue.edu Subject: NOTICE - Cleanroom General Exhaust Interruption Tomorrow 4/1/25 at 8AM Dear BNC Users, For safety reasons we need to ramp down our cleanroom general exhaust system tomorrow at 8AM for ~30 minutes to address a unsafe condition and to prevent damage to our main exhaust fan units. Solvent fume hoods in the cleanroom will not be available during this time. Thanks you for your understanding during this unscheduled event. Please call me if you have any questions. Thanks, Mark Voorhis Building Manger Birck Nanotechnology Center Office 765-494-3036