Holiday Schedule for Saturday through Monday, September 1-3 Saturday, Sunday, Monday are the normal schedule for a weekend. See note below regarding shutdown beginning 4:00 PM on Monday. Shutdown Schedule for Tuesday through Thursday, September 4-6: Monday, 4:00 PM: All materials must be removed from cleanroom hoods. Tuesday, beginning at 7:30 AM: CLEANROOM CLOSED. No ultrapure water available, no acid processing in laboratories. No hazardous gases available. Wednesday, all day: CLEANROOM CLOSED. No ultrapure water available, no acid processing in laboratories. No hazardous gases available. Wednesday, 4:00 PM: All materials must be removed from laboratory hoods (Including biosafety cabinets; all bio materials must be removed from exhausted enclosures). Thursday, 8:00 AM: Cleanroom will re-open, barring unforeseen circumstances. Thursday, all day: LABORATORIES CLOSED. Friday, 8:00 AM: Laboratories will re-open, barring unforeseen circumstances. Thank you for your cooperation and patience during this important preventive maintenance procedure. John John R. Weaver Facility Manager Birck Nanotechnology Center Purdue University (765) 494-5494 jrweaver@purdue.edu