The problem with the hazardous gas monitoring system has been corrected and the gases can now be used. Appropriate parts are now in stock should this failure mode occur again. Thank you for your patience and cooperation during this unscheduled system failure. Special thanks go to Steve Jurss who worked over the weekend to restore the system performance. John Weaver John R. Weaver Facility Manager Birck Nanotechnology Center Purdue University (765) 494-5494 jrweaver@purdue.edu