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Sampling and Analysis

Exposure Evaluation

• OSHA Technical Manual (OTM). OSHA Directive TED 01-00-015 [TED 1-0.15A], (1999, January 20).
  • Crystalline Silica. Includes sampling information for crystalline silica.
• Cyclone Leak Test Procedure. OSHA, (1997, September 15). Describes a method of leak testing cyclone sampler assemblies used for respirable sampling of silica.

Sampling

• Occupational Chemical Database. OSHA. Presents, in concise form, data on a large number of chemical substances that may be encountered in industrial hygiene investigations:
  • Silica, Crystalline, Mixed Respirable (Quartz, Cristobalite, Tridymite)

Analytical Methods

• Quartz and Cristobalite in Workplace Atmospheres. OSHA Method ID-142, (2015, October). Describes the collection of airborne respirable α-quartz and/or cristobalite in the breathing zone of personnel and the subsequent analysis by x-ray diffraction (XRD). Tridymite can also be collected and analyzed using this method if a reference material and diffraction pattern for tridymite are used.
• NIOSH Manual of Analytical Methods (NMAM). U.S. Department of Health and Human Services (DHHS), National Institute for Occupational Safety and Health (NIOSH) Publication No. 2003-154, (2003). Contains extensive information on direct-reading instruments. The following NIOSH methods use direct-reading techniques:
  • Silica, Crystalline by XRD. Method No.7500.
  • Silica, Crystalline by VIS. Method No. 7601.
  • Silica, Crystalline by IR. Method No. 7602.
  • Silica, Crystalline in coal mine dust, by IR. Method No. 7603.