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. Author manuscript; available in PMC: 2021 Oct 20.
Published in final edited form as: Sci Total Environ. 2020 Jun 6;740:140017. doi: 10.1016/j.scitotenv.2020.140017

Table 4.

Surface-soil concentration metrics for select PFAS retrieved from the U.S. Air Force AFFF Impacted-Site database. All values are reported in μg/kg. See footnote for PFAS descriptions. Sampling interval depth ranges from 6 to 30 cm from surface.

Metric PFBA PFHxA PFOA PFDA PFBS PFHxS PFOS PFDS PFOSA 6:2 FTSA
Range 0.1-820 0.07-15300 0.07-50000 0.03-430 0.05-5550 0.07-21000 0.09-373000 0.05-640 0.09-20000 0.2-68000
Median 0.7 1.4 1.4 0.8 0.9 3.5 18 1.9 2.7 3.8
Geometric Mean 1.0 1.9 2.0 1.0 1.4 4.6 22 2.3 3.7 6.5
Number of Samples 877 1690 2469 1100 927 2649 3450 573 635 632

PFBA=perfluorobutanoic acid; PFHxA=perfluorohexanoic acid; PFOA=perfluorooctanoic acid; PFDA=perfluorodecanoic acid; PFBS=perfluorobutanesulfonic acid; PFHxS=perfluorohexanesulfonic acid; PFOS=perfluorooctanesulfonic acid; PFDS=perfluorodecanesulfonic acid; PFOSA=perfluorooctanesulfonamide; 6:2 FTSA= 6:2 fluorotelomer sulfonic acid