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Navy reports limited sludge, stepped‑up groundwater monitoring at Red Hill; data show no clear off‑site plume
Summary
At the Sept. 17 CWRM meeting Navy task force members reported tank inspections and limited sludge removal at Red Hill, a ramp‑up of groundwater monitoring and biweekly sampling, and said current data indicate contaminant detections remain largely within the facility and have not migrated off‑site; the Navy announced more sentinel wells, pilot remediation studies and public webinars. DOH will hold an open house Oct. 8.
Navy task force representatives briefed the commission Sept. 17 on Red Hill decommissioning, groundwater sampling and remediation planning.
Navy presenters said they began air quality monitoring in May and have degassed and entered Tanks 7 and 8 for inspection and cleaning preparations. Contrary to historical expectations of roughly 2,000 gallons of tank sludge per tank, presenters reported a much smaller recovery: 'we pulled 38 gallons of sludge combined out of the 2,' and said sludge removal took about a day and a half per tank.
The Navy described an expanded groundwater monitoring network comprised of wells sited inside the tunnel (to detect facility‑proximate contamination), peripheral compliance wells placed around the…
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