The Apollo crew was breaking loose the bolts at the septum between HAM 5 and HAM6 to prepare for the upcoming HAM5 installation work. Monitored the dust counts before and during the work on the bolts. Before work started the dust counts in the cleanroom were zero. During the loosing process counts were in the 40 to 60 range while the bolts were actually being turned. Shortly after the wrench work stopped the counts dropped back to zero. I saw no counts over 100 0.3 micron particles during the monitoring; larger particle counts were generally less than the 0.3 micron counts.