kyle.ryan@LIGO.ORG - posted 18:36, Wednesday 31 August 2011 (1329)
Vented Y-end, installed Rai's RGA, pumped Y-end
Found leaking (cocked centering ring) NW gasket on NW blank at Vent valve ~3 hours after pump-down started -> corrected and continued pumping -> Room air leaking into volume is wet = complication.