The advice on this site is appropriate for small and medium-sized releases such as those that would be expected from a terrorist attack, not for industrial-scale releases such as those at Bhopal, India or Chernobyl, Ukraine.

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This web site was prepared by the Airflow and Pollutant Transport Group at Lawrence Berkeley National Laboratory. We have substantial knowledge and experience (1.03MB PDF document, 2 pages) in protecting buildings and occupants from chemical or biological attack. Click on the title bar, above, for more information on our group, department, or laboratory.