NIOSH reported that crystalline silica in high-volume and settled samples suggested sugar beet pulp dust was not biologically inert and could potentially produce silicosis in exposed workers; the evaluated exposures did not exceed OSHA standards.
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page 3 · Summary · 4
Although crystalline silica was not detected in any of the personal air samples for pulp dust, its presence in both the hi-vol air and settled dust samples suggests that sugar beet pulp dust is not biologically inert, but rather that it can potentially produce silicosis in exposed workers. None of the exposures during the processing of sugar beets exceeded their respective OSHA standards.