Update on PFAS Method Validation for Non-Drinking Water Samples
Method validation for per- and polyfluorinated alkyl substances (PFAS) in non-drinking water samples was discussed at the ASTSWMO Annual Meeting in October 2017. The focus was on simplicity, robustness, and efficiency in sample processing, with considerations for monitoring requirements. Various methods for PFAS analysis and sampling/storage techniques were explored to enhance detection and prevention of PFAS contamination. Guidance documents and contacts for further inquiries were provided by the EPA.
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Per- and Polyfluorinated Alkyl Substances Method Validation Update for Non-Drinking Water Samples ASTSWMO Annual Meeting October 26, 2017 Christopher A. Impellitteri-EPA-ORD Schatzi Fitz-James-EPA-OLEM Cynthia Caporale-EPA-Region 3 U.S. Environmental Protection Agency 10/26/2017 1
Drinking Water Method 537 Six per- and polyfluorinated alkyl substances (PFAS) under the 3rd Unregulated Contaminants monitoring rule (UCMR3) Eight additional PFAS not listed on UCMR3 Finished (treated) drinking water samples; potable groundwater 2 U.S. Environmental Protection Agency
Non-DW Sample Methods Focus on: Simplicity Robustness Production lab use Minimizing sample transfers, extractions, filter steps, chemical additions (e.g. pH adjustments) Find a balance among sensitivity, ease of implementation, and monitoring requirements 3 U.S. Environmental Protection Agency
PFAS Method Validation 24 PFAS (including all target analytes in EPA Method 537) Methods under consideration for water (all using LC/MS/MS) Direct injection Solid phase extraction (with and without radio-labeled internal standard correction) Target Reporting Limit: 10 ng/L Publish validated method in 2018 SW-846 8327, 8328, 8329 Evaluating Methods to include Solids U.S. Environmental Protection Agency 4
PFAS - Sampling and Storage Sampling/Storage Holding time studies Sample vessel materials (glass, polycarbonate, high-density polyethylene) Standard operating procedures for field sampling Initial focus on groundwater 5 U.S. Environmental Protection Agency
EPA Sampling Guidance for GW Draft PFAS Groundwater Sampling Guidance expected January 2018 Not a stand-alone document Use in conjunction with existing groundwater sampling guidance Covers specific actions and materials to use or to avoid to prevent PFAS Contamination or loss 6 5/23/2017
Questions? Comments? Contacts: OLEM-Schatzi Fitz-James: fitzjames.schatzi@epa.gov Region 3- Cynthia Caporale: caporale.Cynthia@epa.gov ORD-Chris Impellitteri: Impellitteri.Christopher@epa.gov Communications-Michelle Latham: latham.michelle@epa.gov 7 U.S. Environmental Protection Agency
