Follow up to alog entry https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=26512

Kyle and I quantified the leak in east door outer o-ring this morning to measure 2.5e-7 Torr-L/s. The leak was found around the 10 o'clock position, which is the location of the "old leak" at a o-ring seal repair region. This leak is small and no need to pull the door for repair. The annulus ion pump will mitigate the leak.

Details about the leak check activity:
Background of leak checker this morning after running all weekend was 6e-9 Torr-L/s.
Calibrated external leak measured 5.5e-8 Torr-L/s.
We sprayed the 2nd quadrant with instrument air while flooding the other quadrants with He. No leaks detected.
Then we taped/sealed the two adjacent notches and flooded the notch in 2nd quadrant with He. Detected a leak and continued to flow He until the leak rate stabilized at 2.5e-7 Torr-L/s.
Then we flowed He to the left and right of the notch. Leak rate decreased and then rose back to 2.5e-7 Torr-L/s as we approached 10 o'clock position. 

We will pump down HAM6 this morning. We expect roughing to take 3-4 hours before we can turn turbo pump on. After we activate turbo we will open GV5&7.