| http://www.w3.org/ns/prov#value | - arsenic into the workplace.(2) Floors and other accessible surfaces contaminated with inorganic arsenic may not be cleaned by the use of compressed air, and shoveling and brushing may be used only where vacuuming or other relevant methods have been tried and found not to be effective.(3) Where cleaning is performed by vacuuming methods, a high efficiency internal filter (99.97 percent efficiency
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