Eugene Proposes Capping Dioxin Soil at Trainsong Park
Oregon regulators have opened a six-week public comment period on the city's $1.2 million plan to bury contaminated soil in the west Eugene park.
Updated on Nov. 6, 2026 in Environmental
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The city of Eugene's preferred option is a $1.2 million design that buries and caps dioxin-contaminated soil at Trainsong Park, a 5-acre park in west Eugene. The Oregon Department of Environmental Quality has opened a six-week public comment period and determined the approach will be protective of human health and the environment.
Why it matters
The plan buries and caps the pollution in place rather than hauling it away, which affects how residents of Eugene will use the park after cleanup. Government agencies have not determined how the park became contaminated, leaving the source of the dioxins unresolved.
Soil testing found dioxins in fenced-off areas of the 5-acre park, with the contaminated soil volume estimated at 770 dump trucks. The source of the contamination remains under investigation, and the cleanup plan has not yet been approved.
The players
Oregon Department of Environmental Quality
The state environmental regulator that oversees cleanup of contaminated sites in Oregon and reviewed the city's plan.
Environmental Protection Agency
The federal agency that provided a $1.5 million brownfields grant funding part of the Trainsong Park cleanup.
J.H. Baxter & Co.
A shuttered wood treatment facility about a mile from the park that is a Superfund site, though it has not been confirmed as the contamination source.
The details
The cleanup plan excavates up to 2 feet of contaminated soil in selected areas, moves it under a new 4-foot berm, and backfills with clean soil or with 12 inches of gravel and 12 inches of topsoil in more contaminated spots. Environmental scientists found the dioxins bind to soil rather than dissolving into groundwater or becoming airborne.
Timeline
2021: A consultant testing soil to set benchmarks found elevated dioxin concentrations at Trainsong Park.
September 2026: The city held a public meeting presenting four cleanup approaches.
Oct. 30, 2026: The Oregon Department of Environmental Quality issued a public notice finding the plan protective.
Nov. 6, 2026: The six-week public comment period opened.
2027: If approved, cleanup work would begin and last through the summer.
Big Picture
Eugene's capping approach follows the EPA brownfields grant program's framework for funding cleanup of contaminated urban land. The Trainsong Park plan, which buries pollution rather than removing it, shows how such grants are being applied to public parks in place.
Residents who use Trainsong Park will see excavation and berm construction over the cleanup period if the plan is approved. The park will be backfilled with clean soil, gravel and topsoil, with a new 2,500 square foot concrete plaza included in the design.
The takeaway
Residents interested in the plan can submit comments during the six-week public comment period opened by the Oregon Department of Environmental Quality. The outcome will determine how the park is cleaned and reopened for public use.
What happens next
If the Oregon Department of Environmental Quality approves the plan following the six-week comment period, cleanup work would begin next year and last through the summer.
Further reading
For more on local pollution cleanup efforts, see Environmental coverage.
Source note: This article includes information reported by Lookout Eugene-Springfield.
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