To avoid the very unlikely scenario that we have another power glitch that puts the dust monitor vacuum pump in reverse again, I've disconnected the vacuum line leading to the dust monitors in the PSL enclosure and the anteroom. The dust monitors themselves are left on, so this means that we should ignore the counts reported by these dust monitors. We will not have dust counts in these rooms until this is rectified.

I did this by removing the 3/4" tee underneath the South side of HAM1 and placing a length of 3/8" tubing with an unoccupied quick disconnect into the empty 3/4" tube. This 3/8" tube came from the other line of the tee, ie. one went to the PSL and one to this unoccupied line. See annotated pictures.