Work Item
ASTM WK94166
Revision of D7201-06(2020) Standard Practice for Sampling and Counting Airborne Fibers, Including Asbestos Fibers, in the Workplace, by Phase Contrast Microscopy (with an Option of Transmission Electron Microscopy)
Rationale
Standard is being revised to 1) Method in place of Practice, 2) include updates to NIOSH 7400, 3) be applicable to incoming occupational exposure limit values, removal of absolute TEM counts.
Work Item Status
Date Initiated: 03-12-2025
Technical Contact: Martin Harper
Item: 000
Ballot:
Status: