(Jordan V., Gerardo M.)

Today at 18:50 UTC, we vented the turbo header line very slow, we did that at the mechanical room side using a bottle of nitrogen gas, total time to vent the line was 15 minutes.  The turbo header line travels from the mechanical room into the LVEA via the East bay north wall area, and travels to under the main vacuum tube via the bridge over the squeezer tables, and gets very close to HAM5, then it takes a 90 degree turn on the +Y direction to travel under HAM4 and BSC2, under BSC2 the pipe takes a 90 degree turn on the +X direction, to travel under BSC3, then under BSC7, then the pipe (4 inch OD) stops about +32 feet from BSC7, the pipe is sitting on the ground.  This turbo header line was pumped down during last maintenance period, and remained under vacuum since, we vented the line to remove a component that we need to take a closer look at.  Another time to note is the final vent while removing a component of the turbo header, time this took place was at 20:10 UTC, for about 5 seconds.

Times summary of possible noise: vent of turbo header line, 18:50 UTC, ended at 19:05 UTC.  A second vent took place at 20:10 UTC ending 5 seconds later.