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. Author manuscript; available in PMC: 2023 Apr 6.
Published in final edited form as: J Environ Health. 2021 Jan-Feb;83(6):20–27.

Table 1.

Eight-Hour Time-Weighted Average Air Levels of Perfluorooctanoic Acid (PFOA) Near Process Sumps

Day PFOA Concentration (mg/m3) Comment
1 0.065 Low pH sump
1 0.007 After sump pH adjusted to 7
11 0.061 Low water in sump
13 0.004 Water level restored