The pressure in corner station is 6.5e-7 Torr. Attached is a projection of *rough* dates at lower pressures. Ideally, we want to wait to open to the arms until the corner pressure is 1e-7 Torr on the turbos alone, and then valve in IPs and CPs. Last May when we vented corner for one day, we opened back up to arms at 2e-7 Torr in 16 days. Will consult Vacuum Review Board on how to proceed with opening up GV5 for y-arm commissioning.