The Chlorine Institute (CI) announced on July 27 the issuance of a new edition of Pamphlet 74 - Guidance On Estimating the Area Affected By A Chlorine Release. Edition 6 “reflects CI’s strong collaboration with the Department of Homeland Security (DHS) Chemical Security Analysis Center and incorporates information obtained from the DHS 'Jack Rabbit I' chlorine release field trials," says CI.
Edition 6 uses the Hazard Prediction and Assessment Capability (HPAC) model, developed and widely used by the U.S. Government, with the data and findings from the field trials to provide more accurate modeling results. CI intends the new version to help chlorine producers and users, local emergency planning committees and responders estimate the area affected by a chlorine release for both emergency planning and hazard assessment.
According to CI:
[I]n a chlorine emergency, public and private sector emergency planners need accurate data about how chlorine will disperse in varied weather and terrain conditions. The Jack Rabbit I experimental releases performed at the U.S. Army Dugway Proving Ground in 2010 provide the most current information about the chemistry and physics associated with chlorine releases and allow planners to more effectively form emergency management and action plans keyed to local conditions and the unique properties of chlorine."
Jack Rabbit II testing is scheduled to begin in August to obtain additional data and further refine chlorine dispersion models. Once the new data are analyzed, a seventh edition of Pamphlet 74 may be required.
The new edition of Pamphlet 74 is available as a free download from the CI bookstore.