On Thursday, October 24, 5-7 am, OFMD technicians will replace an actuator on the outside air damper serving one of the basement vivarium supply air units (AHU-9). This work will not affect the basement vivarium; however, the B120 A/BSL3 suite may possibly be affected when the supply air unit is brought back online. As a precaution, no work may occur in the B120 A/BSL3 suite during this outage.