All employees, users, visitors, authorized guests, scientist emeritus, retired guests and subcontractors who access non-public areas of the Batavia or South Dakota sites will be impacted. Visitors to Fermilab who visit only public areas will not be impacted. Public areas include: the Lederman Science Center, the site’s walking/bicycling paths, portions of building 327, the lobby area of Aspen East and specific portions of Wilson Hall – the Wilson Hall atrium, portions of the 2nd floor, portions of the ground floor, portions of the mezzanine, Ramsey Auditorium and the elevators.