I reconnected the vacuum lines used to pull air through the dust monitors that are stationed in the PSL laser room and ante room. Back in September 2025 (alog87005) they were disconnected because the old pump had been running in reverse after a power glitch and the carbon graphite vanes blew air through the lines as well as little bits of the vanes. Since then we have replaced all of these pumps with ones that cannot contaminate the areas they are trying to sample. The corner station is running on a scroll pump with a automated back flow valve and the end stations are on diaphragm pumps. 

Dust counts in the PSL laser room and ante room should now be considered real.