Exhaust fan 8 will be shut down to assist the contractor working on the 9th floor construction project to replace the ductwork serving the exhaust fan. Areas affected are as follows. 2nd floor room 252B, fume hood 252-1, Fume hood 251-2. 3rd floor rooms 356, 360B, and Fume hood 355. 4th floor rooms 455, 458, and fume hood 458. 5th floor rooms 551, 551A, 552, 553, 555, 557A to include washer and dryer in that space. During this time, do not use fume hoods, washer and dryer.