Current pump down much different that previous pump down of same volume (HAM6) -> Apparent gas load resulting in current HAM6 pump down curve can't be attributed to LVP Krytox grease added this last chamber entry -> Annulus volume in 10-6 torr range -> Adjacent blanked-off vent/purge and roughing pump port dead volumes were valved out after rough vacuum achieved and should still be at rough vacuum -> Need to leak test HAM6 particularly view ports and Turbo pump ballast port