Don't miss the big stories. Like us on Facebook. BENNINGTON â The state Department of Environmental Conservation is seeking public comment through April 2 on a draft plan for reclassifying groundwater in a PFAS (poly-fluoroalkyl substances) contamination zone around two former ChemFab Corp. plants as unsuitable for drinking water. The proposal is related to the consent agreements the state earlier negotiated with Saint-Gobain Performance Plastics to address PFAS pollution of hundreds of wells by funding extension of municipal water lines to affected properties and covering other costs after widespread contamination was discovered through testing in 2016. Saint-Gobain also agreed to fund a formal petition to the state, prepared by Barr Engineering, with a detailed proposal for reclassification of the groundwater.