I noticed that the Y-1 module pressure was in the upper 10-7 torr (Y-mid end) range as I was preparing to leave tonight!!!!! -> I notified John W. and went to the Y-mid to investigate:  

*GV10 and GV9 annulus pressures ~normal 
*CP3 level normal
*Started QDP80 pump and connected it to the closed purge/vent valve (Y-mid MTP decoupled to premit retraction of spool bellows for BSC6 removal) in preparation to rough-down BSC6 volume (currently vented)
*combined GV10 gate annulus volume to rest of annulus piping (i.e. pumped GV10 gate annulus) 
*Soft-closed GV9 

John, Bubba, Scotty and Robert S. arrive 

*Begin pumping down BSC6 volume with QDP80 
*Tightend many of the suspect-looking "gappy" conflat flanges, tapped joints, wiggled external piping etc.
*Opened GV9 
*Closed Y-mid vent/purge valve but leaving QDP80 running

No conclusion at this time.  

John W. confirms that he is able to view the site from home. John W. and I (maybe Mike L.) will monitor off and on from home during the night.  

PT244 @ 1.08 x 10-6 torr as of 2105 hrs. local