Challenges Seen in the Development and Delivery of EPA 537 R1.1 (and DOD-modification)

Oral Presentation

Prepared by W. Perry
Gulf Coast Analytical Laboratories, LLC, 7979 Innovation Park Drive, Baton Rouge, LA, 70820, United States


Contact Information: william.perry@gcal.com; 225-214-7077


ABSTRACT

The development of perfluoroalkyl substances (PFAS) analysis through credentialing and delivery of services has been challenging for Gulf Coast Analytical Laboratories (GCAL).

Challenges have included modification of an EPA Method designed for clean matrices like drinking water to accommodate matrices like non-potable water and solids/waste. Additionally, we have expanded the target list in coordination with application of isotopic dilution. Method validation processes included identification and development of PFAS-free blank water within the laboratory, development of sample handling processes isolated from other laboratory activities, identification of contamination sources in methanol, work environment, and sample containers. Our PT providers have been selected carefully to provide widest range of analytes in the greatest number of matrices. We have also had to choose when to follow the market with respects to additional matrices, new targets and lower detection limits, and when to state what the limits of the services we feel comfortable providing.