This is the standard language used by environmental authorities, look:

[PDF] POWNAL TANNERY, REMOVAL ACTION REPORT: NON-TIME CRITICAL REMOVAL ...
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and powder removal. One sample exceeded the action level for dioxin by ...
Action levels were established for asbestos and dust in ambient air at the Site. ...
www.epa.gov/ne/superfund/sites/pownal/200669.pdf

[PDF] RR274 - Nanoparticles: An occupational hygiene review
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For example, for fibrous aerosols such as asbestos and glass fibre, the ...
placed into the clean-air enclosure for powder removal. Sampling was carried out ...
www.hse.gov.uk/research/rrpdf/rr274.pdf

Patent 4053661: Particle cloud coating method and apparatus
They May then pass through sequential excess powder removal, heating and cooling stages, and preheating ... Such as asbestos, glass, the typical flocs, etc. ...
www.freepatentsonline.com/4053661.html