0930 - 1010 hrs. local -> To and from Y-mid Opened exhaust check-valve bypass-valve, opened LLCV bypass valve 1/2 turn -> LN2 at exhaust in 50 seconds -> Restored valves to as found configuration. Next CP3 overfill to be Wednesday, July 13th. Also, 0945 - 1000 hrs. local -> Ran purge-air supply and QDP80 at Y-mid (maintenance task)