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• 21:29, 7 December 2016 Debra Tabron (talk | contribs) uploaded File:Adam-2009-Memorandum soil screening levels for PFOS and PFOA.pdf (Adam, G., 2009. Memorandum: Soil Screening levels for Perfluorooctanoic Acid (PFOS) and Perfluoroctyl Sulfonate (PFOS). Atlanta, GA: Region 4, 2009.)