SEDL / STP / STP1342-EB / STP42348S

Further Observations of Settled Asbestos Dust in Buildings

Ewing, William M.
Technical Director, Compass Environmental, Inc., Marietta, GA

Pages: 10    Published: Jan 1999

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Abstract

Surface sampling for asbestos is a tool used to determine the potential for asbestos exposure. It is also employed to estimate when a surface is sufficiently clean of asbestos structures.

The sampling and analytical procedure employed has been described in ASTM standard method D 5755-95. Sampling was conducted in 66 buildings and from out-of-doors. The geometric mean surface concentration was 3.7 million asbestos structures per square centimeter (s/cm²) in areas with asbestos-containing fireproofing. Samples collected from areas having asbestos-containing acoustical plaster had a geometric mean of 160,000 s/cm². Samples collected in six buildings without friable asbestos-containing surfacing materials indicated a geometric mean of 1000 s/cm².