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ASTM - D5755-03
Standard Test Method for Microvacuum Sampling and Indirect Analysis of Dust by Transmission Electron Microscopy for Asbestos Structure Number Surface Loading
This method utilizes an air cassette as a type of micro-vacuum sampling device to gather dust off a carefully measured surface. Typically 100cm2 is sampled. The samples are then analyzed by TEM to identify asbestos. The result is an estimate of the surface concentration of asbestos structures reported in asbestos structures per square centimeter. There are no accepted “pass/fail” criteria for this method. This method is best employed to compare effectiveness of pre- and post-asbestos abatement activities.
ASTM - D5756-02
Standard Test Method for Microvacuum Sampling and Indirect Analysis of Dust by Transmission Electron Microscopy for Asbestos Mass Concentration
Same as ASTM D5755 method but, this method provides results in mass of asbestos per unit area of sample surface OR mass of asbestos per mass of sampled dust.
ASTM - D6480-05
Standard Test Method for Wipe Sampling of Surfaces, Indirect Preparation, and Analysis for Asbestos Structure Number Concentration by Transmission Electron Microscopy
ASTM D6480-05 is a procedure to identify asbestos in dust samples wiped (as opposed to vacuumed) from surfaces and determine the concentration of asbestos structures in number of asbestos structures per unit area.
Qualitative (+ / -) Analysis
A wipe or bulk dust sample is sonicated and filtered onto an MCE filter and analyzed for the presence of asbestos by TEM. This method will determine the presence or absence of asbestos in samples wiped from surfaces.
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