Reports until 11:51, Friday 28 February 2025
Environmental Dust/Particulates
Alex Ramirez - posted 11:51, Friday 28 February 2025 (12154)
Particle Counts During Lab Dry Wall Replacement 2-14 thru 2-26-2025

Here I am showing the particle count plots from 2-14-2025 to 2-26-2025. 

The particle counter was placed near the seeder atop the optics table in the B111B cleanroom. 

This duration intersects that of the majority of the maintenance work on the flooded drywall in the lab. 

As seen there were counts on the order of 1-2 counts in the 0.3um size throughout the installation. When we placed the particle counter on the ground (on 2/26) under the tables and shuffled around we saw spikes of 400 + on all sized particles. 

Overall it seems that the containment system worked well to reduce the overall number of particles in the clean room and 1-2 particles at intermittent times throughout the process seems reasonable. 

 

Images attached to this report