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Guidance Document for Applying the Pesticide Root Zone Model (PRZM) in Screening Level PFAS Leaching Assessments

This document provides guidance on how to use the Pesticide Root Zone Model (PRZM) as a screening-level tool to assess the potential for per- and polyfluoroalkyl substances (PFAS) to leach into groundwater from land applied residuals, including industrial solids and municipal wastewater biosolids.