CHROMIUM_6 says:The primary means of human exposure to hexavalent chromium and chromate salts are inhalation, ingestion, and skin contact. Hexavalent chromium can be inhaled when hexavalent chromium dust, mist, or fumes are in the air. Particles of chromium dust can contaminate hands, clothing, beards, food, and beverages. The following references provide exposure limits and analytical methods used to evaluate hexavalent chromium compounds.