Mealey's (December 13, 2019, 10:08 AM EST) -- CHARLESTON, S.C. — A federal judge in South Carolina on Dec. 12 ruled that six plaintiffs in the multidistrict litigation for the firefighting agent known as aqueous film forming foam (AFFF) could add as defendants numerous entities affiliated with E.I. du Pont de Nemours & Co. that the plaintiffs say bear some liability for their injuries from exposure to perfluorooctane sulfonate (PFOS) and/or perfluorooctanoic acid (PFOA) (In re: Aqueous Film Forming Foam, MDL 18-2873, D. S.C.)....