On Tuesday, May 27th, 6 am – Thursday, May 29th, 2:30 pm. Exhaust fans 24, 25, and 27 will be shut down to assist the contractor in removing and replacing the ductwork on the roof. This will affect the building exhaust on the 8th floor, rooms 880H through 880Q, the fume hood in 880Q, and the 9th floor. No work should be conducted in the fume hood in 880Q during this time. Thank you for your patience during this time.