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Table 1 Characteristics of samples collected from ISS cabin locations and Earth-based cleanrooms where spacecraft components are assembled

From: Microbiomes of the dust particles collected from the International Space Station and Spacecraft Assembly Facilities

Sample name Replicates Location Cleanroom classification Source Air/surface Specifications Usage time Model Mission activities
ISS HEPA 1 ISS None Filter element particles Air HEPA rated, retains 99.97 % particles 0.3 μm; 20-mesh inlet screen has 841 μm sieve openings 40 months Part no. SV810010-1, Serial no. 0049; HEPA media supplied by Flanders Filters, Inc.; Nomex inlet screen Returned aboard STS-134/ULF6 in May 2011
ISS Debris 2 ISS None vacuum cleaner bag dust Surface Vacuum bag retains particles >6 μm; HEPA-rated filter retains particles >0.3 μm 1 day ISS vacuum cleaner Expedition 31; returned aboard Soyuz flight 29S in July 2012
JPL-SAF Debris 2 JPL-SAF 10 K Vacuum bag dust Surface Retains 99.7 % particles >3 μm 70 days Nilfisk GM80, 81620000 No major mission
JPL-103 Debris 1 JPL-103 1 K Vacuum bag dust Surface Retains 99.7 % particles >3 μm >180 days Nilfisk GM80, 81620000 No major mission