Respirable crystalline silica

Respirable crystalline silica means quartz, cristobalite, and/or tridymite contained in airborne particles that are determined to be respirable by a sampling device designed to meet the characteristics for respirable-particle-size-selective samplers specified in the International Organization for Standardization (ISO) 7708:1995: Air QualityParticle Size Fraction Definitions for Health-Related Sampling.


29 CFR § 1910.1053

Scoping language

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