In violation of several policies, Fire Protection Services was working on the fire panel without notifying anyone in the BNC. They did, however, notify Purdue Fire and Purdue Police that maintenance was underway and not to respond to an alarm. They did inadvertently set off the toxic gas alarm, initiating an evacuation. Then, again in violation of BNC policies, Fire Protection Services announced an "all clear." This second announcement should not have been made, it was made such that few people heard and understood it, and it was not repeated. Consequently, a great deal of confusion ensued. At no time was there a dangerous situation in the facility. It was a false alarm. Work is underway to prevent a recurrence of this unfortunate incident. It is VERY IMPORTANT that everyone respond to any alarm in the building as if it was an actual incident. You must evacuate immediately. In event of a false alarm, we will get you back in the facility as rapidly as possible. Thank you for your understanding and cooperation, John Weaver John R. Weaver Facility Manager Birck Nanotechnology Center Purdue University (765) 494-5494 jrweaver@purdue.edu