John and I investigated Wednesday afternoon and found everything quite -> John excited the ambient-air vaporizer (large finned aluminum ambient heat exchanger mounted on the concrete slab near the supply dewar outside of the building and piped in-line with the GN2 REGEN connection to the pump and which is easily mechanically excitable with wind) while I was in the VEA listening - Nothing -> We also created excessive LN2->GN2 boil-off in CP8 by filling in manual mode at a "high" LLCV %OPEN setting - Nothing.  

We did note that, nowhere in the piping between the ambient air vaporizer and CP8 was the piping clamped to anything.  In fact, it was just resting on pipe stands.  Also, an "ice ball" had formed on the bellows at the pump penetration - reminding us of the fact that all of the ambient air vaporizers on the X-arm have severed welds at the ASA connection flange which results in a parallel path for the GN2 exhaust to exit he pump -> We then capped the piping to eliminate this as an excitation mechanism