Gerardo, Kyle 

We torqued BSC4's dome bolts and found many that were very loose. We then valved-out the pump cart and the ion pump responded by temporarily "railing" but has since come on-scale on its own - i.e. we fixed the outer O-ring leak -> The pump cart was then shut down (this pump cart has been running near the SW corner of BSC4 for the past few weeks and shutting it off, finally, is "very exciting" for us!).  During this process, it looks as if the signal cable to the Diagonal Volume's pressure gauge-pair, PT140, was disturbed resulting in an anomalous reading from the Pirani gauge.  This then tripped off the Cold Cathode gauge -> We were able to "wiggle" the cable etc. and get them to resume normal readings.    

Additionally, we determined that HAM11's ion pump needs to be replaced but are electing not to replace it as HAM12's ion pump can keep the combined HAM annulus volumes at adequate vacuum for the time being.  

Currently there are two pump carts running in the LVEA by HAM11 and HAM12, these will be shut down in the next day or two.