The purpose of this testing is to establish the following understandings:

A. The testing protocol meets an accepted repeatability vs known methodology (Gravimetric/XRD analysis) over numerous tests.

B. The AIR XS monitor demonstrates acceptably consistent results under the same conditions.

C. Despite known variability in all dust sampling, under fixed conditions AIR XS meets the standards set out in the manufacturers’ information.

D. Confidence in the average measurement despite inherent variability in the characteristics of particulate including but not limited to size distribution and RCS concentration.

E. To provide information relevant to use applications to allow users to make considered decisions based on a local environment.