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DES reports demolition progress, POET installations and expanded sampling at Saint‑Gobain site; long‑term monitoring plan set
Summary
New Hampshire DES reported demolition progress and expanded sampling at the Saint‑Gobain site, said about 690 POET systems had been installed (approximately 669 complete), and outlined a groundwater monitoring plan intended to generate trend data by the end of 2026.
The New Hampshire Department of Environmental Services provided a March 14 update on Saint‑Gobain site activities, water‑system remedies and long‑term monitoring plans.
DES said demolition of portions of the Saint‑Gobain facility is underway: demolition permits for the lower bay and ancillary structures have been completed and, as of March, about half of the high bay portion of the building had been dismantled. DES said areas of the building substantially affected by PFAS will be sent to out‑of‑state hazardous‑waste disposal and that structural steel is slated for recycling. The company reported scarification of concrete floors in contaminated areas (removal of a shallow surface layer in targeted areas) and told DES it expects to remove the above‑ground structure in 2025, leaving the concrete slab and foundation in place.
DES reported progress on point‑of‑entry treatment (POET) systems and connections: about 690 POET…
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