In the mid-2000s, the U.S. Environmental Protection Agency (EPA) became interested in post-application bystander exposures from fumigants.  This followed work in the 1990s by the California Department of Pesticide Regulation on these issues.  In 2004, the Probabilistic Exposure and Risk model for FUMigants (PERFUM) was released and began to be used for fumigant bystander risk assessment.  PERFUM provided a refined, probabilistic model that could be used to estimate buffer zones under a variety of scenarios.  Over the years, PERFUM was refined to include the capability to model emissions from enclosures where fumigant applications occurred.  EPA has also used the model to estimate bystander exposure for semi-volatile pesticides.  This talk will review the history of fumigant and semi-volatile bystander risk assessment.  This year a new version (PERFUM3) is slated to be released.  The new capabilities in PERFUM include the option to use any of three underlying dispersion models, including ISCST3 (the only option in earlier versions), AERMOD, and CALPUFF.  Additionally, PERFUM3 will include a Graphical User Interface (GUI).  PERFUM3 includes a variety of other smaller enhancements.  Additionally, the capability to model dry deposition is being built into PERFUM3.<br/>

Recent history of fumigant and semi-volatile bystander risk assessment and use of PERFUM

254th National Meeting (2017)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.