Guidance for Applying the Pesticide Root Zone Model in Screening-Level PFAS Assessments

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NCASI hosted this webinar specifically for those managing residuals or biosolids in land application programs. The presentation focused on a recently issued report titled Guidance Document for Applying the Pesticide Root Zone Model in Screening-Level PFAS Leaching Assessments, which discusses the model’s use as a screening-level tool to assess the potential for PFAS to leach into groundwater from land applied residuals. This guidance includes a general overview of the model with description of the more critical model inputs for PFAS, a step-by-step example of how to implement PRZM simulations for PFAS, and an example comparison of PRZM simulation results with field data.

The PRZM modeling framework described in this report can be used by policymakers, regulators, and producers of residuals to identify adequate management strategies that balance the mass loading rate of PFAS in land applied residuals with PFAS concentrations in groundwater sources.

Questions about the webinar may be directed to Derek Sain.