Before starting roughing out the vertex, the annulus system for HAM5 was prepped for pump down by inserting two stoppers into HAM6 annulus system at both door flanges, north and south.  HAM5 annulus system was pump down with an aux cart, and after 2.5 hours of pumping the annulus pressure reached 6.1x10^-05 torr, no leak checking was performed.  Aux cart continues to pump down on system.

After dealing with HAM5 annulus, the purge air blow down dew point was measured at -32.1 ^oC.  Proceeded to equalize the entire system to atmosphere.

Following procedure, rough down was initiated at the vertex at 12:21 local time.

Per WP#7461