Site access to Argonne National Laboratory is permitted only with a proper ID badge or a visitor pass. A visitor pass can be arranged though the sector 4 staff:

• By phone: Contact the sector 4 administrative assistant at the APS, 630-252-5406
• By email to: gagnon@aps.anl.gov.

The gate pass may be picked up at the Argonne Information Center located just outside the Main Gate Guard House off Cass Avenue. The Center is open M-F, 6:30a.m. -5:00p.m. CST. A pass may be left at the Guard House for pick up during times when the AIC is not open. A site access visitor pass alone does not permit a user unescorted access to the APS facility; either a temporary or permanent Cardkey badge is needed to enter the APS unescorted during off hours.

• Main Gate (on Northgate Rd. off Cass Ave.) -Map-
  24 hours a day, 7 days a week
  
• Westgate (on Westgate Rd. off Lemont Rd.) -Map-
  6:15 a.m.-7:10 p.m. M-F
  
• Eastgate (on Eastwood Dr. off Cass Ave.)
  7:00 a.m.-9:00 a.m.
  4:00 p.m.-6:00 p.m. M-F