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Silica in the Workplace

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SILICA IN THE WORKPLACE 3 365-AXJ-01-iGDO © 2020, Workplace Safety & Prevention Services (WSPS) 1 877 494 WSPS (9777) | 905 614 1400 | wsps.ca WSPS.CA Figure 1 Interrelationships between Forms of Silica SILICA Free Silica Cristobalite Silica Fused Silica *Amorphous Silica Combined Silica diatomaceous earth silica gel fused silica precipitated silica quartz cristobalite tridymite tripoli coesite flint chert jasper chalcedony (a mixture of crystalline and amorphous silica) conversion induced by heating *NOTE: Commercially available products may contain appreciable quantities of crystalline silica. Obtain written confirmation of the analysis from the manufacturer or supplier to determine whether or not the Designated Substance Regulation applies.

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