All, As part of the east lab wing exhaust upgrade project, concrete drilling will be taking place in the third floor penthouse floor beginning this afternoon (Thursday) at 1:00 PM and lasting all afternoon. Due to the large number of holes needed, drilling will also occur on Friday, lasting all day during normal business hours. It is possible that acoustical or mechanical vibration may be detectable in the east lab wing, especially on the second floor. Thank you in advance for your understanding. Please contact me with any questions or concerns. Regards, Jeff Kuhn Facility Engineer Birck Nanotechnology Center Purdue University 1205 W. State St. West Lafayette, IN 47907 Ph: (765) 496-8329 Fax: (765) 496-2018