DEQ has selected a final cleanup plan, called a Record of Decision, to address soil contamination on the upland portion of the Willamette Cove site. DEQ’s decision follows a six-month public comment period on the recommended cleanup plan, and the review and consideration of public comments received.
DEQ determined that the proposed remedy, described below, is protective of human health and the environment based on Metro’s planned future use of the site, and is DEQ’s selected cleanup.
Main Elements of the Final Cleanup Plan:
- Remove all soil above hot spots, or elevated levels of contamination, for human health
- Remove all soil with metals above hot spot levels for plants and animals
- Consolidate the remaining contaminated soil under an engineered cap
- Place at least one foot of clean topsoil across the entire upland area
DEQ has also incorporated a contingency remedy in the final cleanup plan to provide flexibility as Metro finalizes their vision in developing the property into a park. The contingency remedy allows Metro to remove additional contaminated soil and take it offsite for disposal at a waste facility.
Frequently Asked Questions
Next steps in preparation for cleanup include a final, large-scale soil sample collection effort to confirm the depth of excavation necessary to achieve cleanup goals. DEQ will also use this data to develop final plans for soil containment and off-site disposal.
Timing for completing the cleanup of the upland is also tied to the Portland Harbor in-water cleanup work, led by the U.S. Environmental Protection Agency. DEQ anticipates that substantial portions of the riverbank will be subject to remedial action, which will impact the upland remedy. DEQ and EPA are coordinating closely on this work along with other federal, state, and local agency partners and the community.
Yes, DEQ's selected cleanup will allow for full access of the upland, on and off trails.
The containment area is an engineer-constructed container for contamination designed to withstand various seismic, climate change and flooding events. DEQ has successfully implemented similar on-site consolidation and capping at numerous sites along the Willamette River and across Oregon. Local examples include the Southwest Waterfront and The Fields Neighborhood Park. Engineers will design the consolidation area cap to withstand seismic and storm events.
Regarding a Cascadia Subduction Zone earthquake, the impacts to the greater Portland area and the Willamette River will be significant and devastating, destroying infrastructure along and over the river. While such an earthquake would cause widespread damage to infrastructure and instant loss of life, damage to the consolidation area has relatively low potential to cause immediate harm to human health. If damaged, DEQ would require the property owner to restore the engineered cap.
DEQ considers the following factors when selecting a cleanup plan: effectiveness, long-term reliability, implementability, implementation risk, and reasonableness of cost. The selected cleanup plan accomplishes equivalent protection to the full removal option, in terms of preventing people, plants and animals from being exposed to contamination. DEQ’s selected cleanup plan also has lower implementation risk because it requires less transportation, which reduces chance of accidents/spills of contaminated material through neighborhoods and across the state. It also minimizes environmental costs, also called carbon footprint.
Metro is the current property owner. DEQ’s cleanup options and ultimate selection are based on how Metro has said they plan to use the property in the future – a nature park with a trail. The Port previously owned and had operated facilities on a portion of the property now owned by Metro. The Port is a responsible party, meaning it is partially responsible for the site’s contamination and is, therefore, partially liable for the upland’s cleanup costs.
DEQ is working with the Port of Portland, Metro and others to clean up contamination at this property, a former industrial site in North Portland along the east bank of the Willamette River. The property comprises approximately 27 acres and approximately 3,000 feet of Willamette River shoreline. Located south of the St. Johns Bridge, adjoining or nearby neighborhoods include Cathedral Park, St. Johns, and University Park.
1920 – Dry Dock Construction – Central Parcel. Photo shows the extensive infrastructure that was created to support the St. Johns Ship Repair Yard.
Willamette Cove’s industrial use dates back to the early 1900s, including a lumber mill, plywood mill, barrel manufacturer and dry dock and ship repair facility. Industrial activities ended by the early 1980s. Metro purchased the property in 1996 and plans to preserve the land primarily as a natural area.
Previous industrial activities resulted in soil contamination. The contamination includes heavy metals, diesel fuel, polychlorinated biphenyls (PCBs) and dioxins. These chemicals pose a risk to human health and the environment. Information on the potential health effects from exposure to these contaminants is available in the 2013 Oregon Health Authority Health Consultation
. While interim cleanup actions were performed in 2004, 2008, and 2015-2016, soil contamination remains at the property that poses a risk to people and the environment.
Recent photo shows current site conditions. Plants and animals have
reemerged after industrial activities generally ceased in the 1970s. Photo
courtesy of Michael Pouncil.
DEQ’s upland cleanup will be closely coordinated with cleanup on the riverbank, beach and the adjoining Willamette River that EPA is managing as part of Portland Harbor Superfund Site work.