Federal regulators have wrapped a crucial round of pre‑excavation testing at the West Lake Landfill in Bridgeton, clearing a major technical hurdle that could let removal of radiologically impacted material begin earlier than residents were originally told. The move tightens the schedule on the long‑running Superfund cleanup and shifts the project from design details to the nuts and bolts of hiring contractors and planning excavation work.
According to EPA's West Lake Landfill dashboard, pre‑excavation confirmation fieldwork started on July 21, 2025 and shifted to new drilling on Aug. 25, 2025. The dashboard shows 634 confirmation samples proposed and collected, with 344 of 482 step‑out samples completed and an 88% completion estimate in the progress table.
As reported by the St. Louis Business Journal, the EPA says pre‑excavation sampling at West Lake is finished, a development that officials and advocates say supports moving the projected excavation start from 2029 up to as soon as 2027. Reporter Jacob Kirn notes that the sampling milestone effectively removes a major procedural roadblock that has helped keep the cleanup stuck in place.
How The Sampling Speeds The Cleanup
EPA’s Remediation Timeline Evaluation from April 2025 lays out the agency’s strategy in plain terms: by doing confirmation sampling during the Remedial Design phase instead of waiting, EPA and the potentially responsible parties can run tasks in parallel, refine excavation boundaries ahead of time and cut down on review delays. The document concludes that this restructuring could trim roughly 12 to 18 months off the original schedule and projected the 100% Remedial Design to be approved by about May 2026, which would clear the way for Remedial Action work. Those details are spelled out in EPA's Remediation Timeline Evaluation.
What's Next
With the fieldwork done, the potentially responsible parties now have to fold the sampling results into the final 100% Remedial Design, finish any remaining drawings and start lining up contracts for the remedial action. EPA documents and media reporting indicate that contracting and approvals are the real pacing items from here. If those steps, along with any consent‑decree negotiations, stay on track, a remedial‑action contractor could be under contract in early 2027, with site mobilization following later that year. The St. Louis Business Journal notes that final dates will still hinge on how long reviews take and what legal agreements are required.
Community Response
Local advocacy groups treated the update as a hard‑won step forward. Just Moms STL called the sampling milestone “exciting progress” and said it plans to host community meetings to brief residents on safety measures, trucking routes and schedules as the site moves closer to actual excavation.
What Residents Should Watch For
Residents following the cleanup will want to keep an eye out for several key documents and announcements in the coming months:
- Posted Remedial Action Workplans
- Public meeting notices
- Contractor procurement announcements
The Missouri Department of Natural Resources and EPA maintain site pages and document libraries where those filings and schedule updates will be posted as the project shifts into its next phase. That information is available through the Missouri Department of Natural Resources.
