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This image shows dust so deep on "I" beam flanges that it exceeds the angle-of-repose and is constantly falling into the general environment. This image shows dust so deep on "I" beam flanges that it exceeds the angle-of-repose and is constantly falling into the general environment.

Cleaning of a facility on a regular basis will prevent buildup of dust. Spills of silica containing materials should be promptly cleaned up. Cleaning should employ methods which do not create dust (e.g., vacuuming, wet washdown) rather than dust generating methods (e.g., sweeping, blowing).
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