The Probabilistic Exposure and Risk Model for FUMigants (PERFUM) was developed by Dr. Richard Reiss and Mr. John Buonagurio at Exponent to address the issue of bystander exposures to fumigants following agricultural applications. Following application of fumigants, some of the applied material may volatilize from the field and be carried downwind, causing potential exposure to persons in the vicinity of the application. The model was developed to address the regulatory need to establish buffer zones for some fumigants. The purpose of a buffer zone is to define a distance from the edge of the field where the concentration of the fumigant is at or below a level assumed to be safe. Over time, the model has been used to estimate bystander exposure for building fumigations and for agricultural applications of semi-volatile pesticides.
The first version of PERFUM was submitted to the U.S. EPA in the summer of 2004. EPA convened a FIFRA Scientific Advisory Panel (SAP) meeting to review the model in August of 2004. The SAP meeting was held on August 24-25, 2004, and the review can be found on the EPA website along with a detailed report on the model. The SAP found the model to be “scientifically sound.” The model has been updated several times since the SAP. In June 2006, a peer-reviewed article describing the model was published by Reiss and Griffin in Atmospheric Environment
The current version of the model is version 3.0. This version includes the capability to use AERMOD or CALPUFF, in addition to ISCST3, for the dispersion calculations. The download below includes all of the files needed to run PERFUM, and also includes a user’s manual.
PERFUM was developed and is being supported with funding sponsorship from Arysta LifeSciences Corporation.
Download PERFUM Installer File
User's Guide (PDF)
PERFUM Version Control File