APS Storage Ring Maintenance Sep 19, 2021 Calendar When: December 13, 2021 all-day 2021-12-13T00:00:00-06:00 2021-12-14T00:00:00-06:00 13 BMC 13 BMD 13 ID C/D 13 IDE General APS Storage Ring Maintenance, Dec 13, 8am – Dec 14, 8am