(July 13, 2023, 11:21 AM EDT) -- CHARLESTON, S.C. — A federal judge in South Carolina on July 12 granted a motion to seal a supplemental agreement involving cities, public water authorities and E.I. DuPont de Nemours & Co. and its affiliates pertaining to a proposed class settlement of more than $1.18 billion related to claims of drinking water contamination from per- and polyfluoroalkyl substances (PFAS) in connection with the firefighting agent aqueous film forming foam (AFFF)....