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Commission hears biosolids, sludge and surface-water standards updates; DES staff cite treatment train and pending EPA reviews
Summary
DES described a Saint-Gobain on-site wastewater treatment train (installed ~2019) that reduced PFAS before discharge; residues were sent to a third party for disposal, not land application. Commissioners discussed land-application risks, a proposed five-year moratorium on agricultural sludge spreading, and DES water-division staff reviewed progress on surface-water PFAS criteria and EPA interaction.
At the December meeting the commission discussed biosolids, sludge spreading, and state surface-water standard options tied to PFAS regulation.
Mike Winstead (DES) described a Saint-Gobain pretreatment system installed around 2019 that reduced PFAS loading to the Merrimack wastewater treatment plant. "Whatever residues they generated that contained PFAS were handled by a third party vendor for disposal, not for land application," Winstead said, adding he has…
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