Assessment of PFAS in Soil and Groundwater: Direct Comparison of New Analytical Technologies for Comprehensive Analysis of PFAS Including Precursors
Precursors are not accounted for by US. EPA method 537 (LC-MS/MS) but have been identified as a source of PFAA’s, so to characterize soil, sediment and waters impacted with PFAS, it is important to assess the precursor concentrations. This presentation will describe new analytical methods to quantify the total concentration of precursors and PFAA’s in water and soil samples.
Soil and groundwater from PFAS contaminated sites as well as soil spiked with characterized AFFF were analyzed by conventional, and new and detailed analytical methods. Results demonstrate that PFOA and PFOS only account for only a small portion of the PFAS present in some impacted soil and groundwater.
This next generation of new PFAS analytical techniques will generate more comprehensive analytical data supporting more robust conceptual site models and improve understanding of PFAS fate and transport. Accounting for precursors will be key for successful design of remedial systems.