Due to the repair activity of the UPS system, the fume hoods in the cleanroom may not be used from 9:30 am to 10:30 AM and 12:30 to 1:30 PM. During this time, the exhaust in the cleanroom will be at a lower level. You may also hear exhaust alarms in the laboratories. This schedule assumes that repairs go well. Thank you for your understanding and support during this necessary repair. John R. Weaver Facility Manager Birck Nanotechnology Center Purdue University (765) 494-5494 jrweaver@purdue.edu