DES presented a progress update on remediation and monitoring tied to the Saint-Gobain consent-decree response, reporting new installation and sampling counts and near-term steps.

Mike Winstead of DES told the commission, "as of December 3, we have 791 POET systems that have been installed," and that "754 of those out of the 791 have been considered officially complete because they've completed their testing regimen." He said the agency expects the company and local utilities to finalize agreements that would allow large numbers of waterline connections, and that 17 properties currently have proposed municipal water connections.

Winstead described ongoing sampling under revised work plans submitted by Saint-Gobain, saying the company’s plan would result "six PFAS sample results for each property that's eligible for sampling within the GMC" by 2026. He said about 1,520 properties have been sampled so far under the revised plan and that crews expect to continue sampling at a steady monthly pace. Winstead added that approximately 169 additional properties have been identified as exceeding ambient groundwater quality standards for PFOA and have been offered bottled water.

Commissioners asked for clarification about houses east of High Range Road; Winstead said the town of Londonderry is actively pursuing water-main work there and that DES has responded to sampling requests in that area. On whether on-site remediation efforts such as an RTO affected groundwater, Winstead said monitoring is ongoing but cautioned that short-term operation of an RTO is unlikely to show rapid groundwater improvements without years of routine data.

Winstead also said Saint-Gobain has agreed to sample some wells it had previously declined to test and that additional wells in Bedford and Litchfield will be sampled twice under the company's submitted work plan.

Next steps noted to the commission included receipt of an updated soil-work plan and attachments before March 2026 and further site-investigation work (including planned borings and soil samples on the Flatley property) to support eventual remedial action planning.

The commission did not take a formal vote on new remediation directives at the meeting; members requested follow-up figures and diagrams that DES staff said would be provided in meeting notes and attachments.