Kyle, Gerardo 

We vented GV12's annulus volume (minus the gate volume) with bottled UHP N2 and observed no leaks into the CP4 volume.  Next, we pumped out the vented volume, combined the gate annulus volume and then administered UHP N2 into the entirety of the annulus volumes.  We observed pressure rises on both the Y2 module side of the closed gate valve as well as the CP4 side - thus indicating that both the inner and outer gate O-rings leak.  We evacuated the system, isolated the gate annulus volume, restarted the AIP (pumps all but gate volume in this configuration) then isolated and shut down the connected turbo+cart.  

Another useful test would be to fully vent the annulus volumes adjacent to the leaking gate annulus volume and then "dump" this gas all at once as a step change into the gate annulus volume and then observe how much time we would have to decouple plumbing and install a blank on one of the two gate annulus pump ports and a pump port valve on the other gate annlulus pump port as was done to GV11 yesterday.