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. Author manuscript; available in PMC: 2024 May 10.
Published in final edited form as: Environ Sci Technol. 2021 Mar 5;55(6):3686–3695. doi: 10.1021/acs.est.0c07296

Figure 3. Scores and loading vectors for the first (Dimension 1) and second (Dimension 2) principal components in surface water and AFFF.

Figure 3.

Panel (a): surface water from watersheds with an AFFF source zone (blue, n = 41) and without an AFFF source (orange, n = 13). Panel (b): Literature data on fluorotelomer (FT) AFFF (purple, n = 19, manufactured between 1986–2017), electrochemical fluorination (ECF) AFFF (green, n = 9, manufactured between 1988–2001), and AFFF impacted surface water from this study (blue, n = 41). Circles in panels (a) and (b) represent the minimum convex hull that encircles all data within the group.