(February 23, 2017, 1:17 PM EST) -- NEW ORLEANS — A federal judge in Louisiana on Feb. 21 partially granted and partially denied motions to dismiss claims brought by a class of residents who contend that Chevron USA Inc. and related companies are liable for contaminating their groundwater with naturally occurring radioactive material (NORM), ruling that the plaintiffs have a valid strict liability claim but do not have a claim for punitive damages against all defendants (Joseph Robertson, et al. v. Chevron USA Inc., et al., No. 15-00874, E.D. La.)....