Particle size distribution and particle size-related crystalline silica content in granite quarry dust

Greg Sirianni, Howard Dean Hosgood, Martin D. Slade, Jonathan Borak

Research output: Contribution to journalArticle

8 Scopus citations


Previous studies indicate that the relationship between empirically derived particle counts, particle mass determinations, and particle size-related silica content are not constant within mines or across mine work tasks. To better understand the variability of particle size distributions and variations in silica content by particle size in a granite quarry, exposure surveys were conducted with side-by-side arrays of four closed face cassettes, four cyclones, four personal environmental monitors, and a real-time particle counter. In general, the proportion of silica increased as collected particulate size increased, but samples varied in an inconstant way. Significant differences in particle size distributions were seen depending on the extent of ventilation and the nature and activity of work performed. Such variability raises concerns about the adequacy of silica exposure assessments based on only limited numbers of samples or short-term samples.

Original languageEnglish (US)
Pages (from-to)279-285
Number of pages7
JournalJournal of Occupational and Environmental Hygiene
Issue number5
Publication statusPublished - Jan 1 2008
Externally publishedYes



  • Exposure assessment
  • Exposure monitoring
  • Granite
  • Quartz
  • Silica

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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