This past August, EPA published Draft Method 1633 – Analysis of Per- and Polyfluoroalkyl Substances (“PFAS”) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS.  Once, finalized, this single laboratory validated method will be available for 40 PFAS compounds (including Perfluorooctanesulfonic acid (PFOS), Perfluorononanoic acid (PFNA), Perfluorooctanoic acid (PFOA), and Perfluorobutanesulfonic acid (PFBS)) in

On March 24, 2021, the Pennsylvania Department of Environmental Protection (PADEP) announced that it issued an National Pollutant Discharge Elimination System (NPDES) permit to the Biddle Air National Guard Base (ANGB) (formerly the Horsham Air Guard Station) containing discharge limits of 70 parts per trillion (ppt) for the combined concentration of perfluorooctanoic acid (PFOA)