US EPA

3101498 

Book/Book Chapter 

Size and shape characteristics of amphibole asbestos (amosite) and amphibole cleavage fragments (actinolite, cummingtonite) collected on occupational air monitoring filters 

Virta, RL; Shedd, KB; Wylie, AG; Snyder, JG 

1983 

Ann Arbor Science 

Ann Arbor, MI 

Aerosols in the mining and industrial work environments. Volume 2: Characterization 

633-643 

English 

The objective of this study was to determine if particle populations from asbestiform and nonasbestiform mineral sources can be distinguished through least-squares regression analyses using the relationship: log10 width = f log10 length + b where f = fibrosity index, the slope of the regression line; b= intercept on the log10 width axis. Amphibole particles on air monitoring filters from three mining and two industrial sites were characterized by scanning electron microscopy and energy-dispersive x-ray spectroscopy analysis. The data are evaluated using particle length and width summary statistics and compared with analyses by linear regression. Conclusions are: the mining site particle populations are morphologically similar, the industrial site particle populations are morphologically similar, and size and shape characteristics of mining site populations are statistically different from those of the industrial sites. Determination of either an asbestos or a nonasbestos source of amphiboles using linear regression techniques on data obtained from examination of air monitoring filters is a potential application of this technique. 

Marple, VA; Liu, BY 

Ann Arbor Science Publications, no. 2 

9780250405329 

International Symposium on Aerosols in the Mining and Industrial Environment 

Minneapolis, MN 

November 1, 1981