(January 17, 2020, 9:51 AM EST) -- PHILADELPHIA — A federal judge in Pennsylvania on Jan. 15 ruled that perfluorooctane sulfonate (PFOS) and pefluorooctanic acid (PFOA), which are two types of perfluorinated compounds (PFCs), are not hazardous substances under Pennsylvania’s Hazardous Sites Cleanup Act (HSCA); therefore, the U.S. Department of the Navy is not liable for remediation of local residents’ groundwater contamination (Kristen Giovanni, et al. v. U.S. Department of the Navy, No. 16-4873, Dorothy Palmer, et al. v. U.S. Department of the Navy, No. 17-765, E.D. Pa.)....