USEPA, PMRA, EFSA, as well as EU Member State regulators are increasingly seeking to use all data that may be relevant to a registration review. In particular, registrants now have the ability to submit data from foreign environmental fate and TFD studies to their respective regulatory agency. We will describe the relevance of soils used in environmental fate and terrestrial field dissipation studies for a herbicide in Europe and Canada to soils found in potential use areas in the United States in response to Registration Review of the herbicide. The assessment used a beta version of the OECD ENASGIP tool and underlying database to identify areas in the United States with comparable environmental conditions to the European and Canadian test sites and soil source locations. This analysis was further expanded to include the use of higher resolution soils data from the USDA NRCS SSURGO database, which also includes data not available in the OECD database, e.g., soil taxonomy. The results demonstrate that terrestrial field studies conducted at sites in Europe and Canada or laboratory environmental fate studies using soils from Europe and Canada are relevant and applicable to soils in the United States, particularly those soils in USEPA regions with high reported usage.

Relevance of environmental fate and terrestrial field dissipation studies conducted in Europe and Canada to use environments in the United States

246th National Meeting (2013)

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