* “Post signs indicating hazards, personal protective equipment requirements, and administrative control requirements at entry points into designated areas where dispersible, engineered nanoparticles are handled. A designated area may be an entire laboratory, an area of a laboratory or a containment device such as a laboratory hood or glove box.
1. U.S. Department of Energy, Nanoscale Science Research Centers, “Approach to Nanomaterial ES&H,” 9 (Rev. 3a May 12, 2008).