[Kyle, Chandra]

Note:  this activity caused expected Y-arm pressure alarms.

Verified we have an outer o-ring leak on GV-11 gate that needs to be addressed before CP4 bake. We back filled the gate annulus with dry N2 and allowed pressure to rise for 7 minutes to see if it would flatten out (it did not as it approached 1e-7 Torr). Once we're back on its AIP, we will re-seat the gate and retest. If that doesn't fix the o-ring we will install a valve at the 1-1/3" gate port so we have the ability to pump on it during bake. If need be, we can soft close GV-10 (which will isolate mid-Y's large ion pump from Y1 arm) and valve in the small ion pump attached to CP1.

Then we repeat for GV-12.