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Chelmsford hears PFAS sampling report for 54 Richardson Road; upgrades and monitoring proposed
Summary
Weston & Sampson presented PFAS monitoring‑well trends at 54 Richardson Road and proposed remedial‑system upgrades and a possible expansion; presenters warned regulatory limits may change and emphasized shutting off sources if levels meet regulatory thresholds.
Officials in Chelmsford reviewed results from recent PFAS sampling at 54 Richardson Road during the Select Board meeting on June 1, 2026. Paul McKinlay and Linda Cooke of Weston & Sampson Engineers presented monitoring‑well trends, source‑area evaluations and options for remedial‑system upgrades and expansion.
The consultants outlined results for on‑site wells, including upgradient and downgradient trends, and noted specific wells showing transitions in contaminant profiles. They said the town will monitor the site and, if regulatory thresholds are reached, the site would be shut down and alternative remedial steps would be taken. The presenters also flagged that federal and state regulatory frameworks for PFAS remain in flux and that EPA maximum contaminant levels could change in coming years.
Board members and presenters emphasized that eliminating or controlling sources is the most effective way to stop groundwater seepage; presenters noted some PFAS sources in the economy (for example, certain electronics and medical devices) are difficult to eliminate, while nonessential uses have been restricted in some states. The consultants recommended monitoring and described a proposed system expansion and remedial upgrades to address the source area.
The presentation included references to national primary drinking water regulation and possible shifts in EPA MCLs that could affect the town’s response options. No formal board action or vote was taken on the presentation itself; the consultants’ report will remain on file with the Town Manager’s Office and the board will receive follow‑up information as monitoring and regulatory guidance evolve.
Next steps: the town will continue monitoring the site, evaluate remedial alternatives if regulatory levels are met, and consider system upgrades and expansion described by Weston & Sampson.
