Attached are plots of dust counts for locations 1 and 2 in the end Y VEA. These are minutes trends going back 30 days from 08:00 am PDT March 19, 2014 (February 17 - March 19). H0:PEM-EY_DUST_VEA1_500NM_PCF: Dust counts greater than .5 microns at location 1 normalized to particles per cubic foot. H0:PEM-EY_DUST_VEA1_300NM_PCF: Dust counts greater than .3 microns at location 1 normalized to particles per cubic foot. H0:PEM-EY_DUST_VEA2_500NM_PCF: Dust counts greater than .5 microns at location 2 normalized to particles per cubic foot. H0:PEM-EY_DUST_VEA2_300NM_PCF: Dust counts greater than .3 microns at location 2 normalized to particles per cubic foot. March 5, 2014 Betsy finds contamination on the cartridge, notes that it must have occurred after installation, comments that dust counts recorded at BSC 10 prior to this date are not useful due to the location of the dust monitor there. alog February 28, 2014 - March 3, 2014 No dust counts available, Comtrol found mysteriously unplugged alog February 24, 2014 cartridge installation alog Jeff's plots of dust counts during cartridge installation alog February 21, 2014 ISI wiped down alog February 20, 2014 TMS bagged alog SUS bagged alog December 5, 2013 Dome and north door removed from BSC10 alog