Site Description
Terminal 115 North (T-115N) is located at the industrial area along the west bank of the Lower Duwamish Waterway (LDW), at 6000 West Marginal Way SW, Seattle, Washington. It comprises approximately 3.2 acres at the northern end of Terminal 115, also owned by the Port. T-115N is zoned for industrial use and contains an approximately 10,000 square foot concrete warehouse that was previously used for tin reclamation processing.
Site History
The property that is now T-115N was constructed of fill material when the LDW was first dredged in the early 1900s. Additional filling in the early 1960s expanded T-115N to today’s size.
In 1963 the property was used for tin reclamation. The Port purchased the property in 1969. Various entities performed tin recycling until Schnitzer Steel Industries closed operations in 1998. The area is currently leased and used by tenants for lumber distribution and vehicle storage.
Contamination Issue
Past operations led to soil and groundwater contamination. The primary contaminants of concern are semi-volatile organic compounds, polyaromatic hydrocarbons, and polychlorinated biphenyls, hydrocarbons, and metals such as copper, lead, arsenic, and zinc.
What is the Port’s Role in this Cleanup?
As the current property owner, the Port is leading efforts to address contamination at the site. The Port entered an Agreed Order with Ecology in 2010. that requires the Port to complete an RI, Feasibility Study (FS), and Draft Cleanup Action Plan (DCAP).
Status
The Port completed the RI in 2024 and began working on the FS in 2025. The FS is anticipated to be submitted to Ecology in 2026. The DCAP is expected to be completed in 2027. Remedial Design is expected to begin in 2028, and construction contracting is estimated to begin in 2030.
Contact Information
Brick Spangler | Senior Environmental Program Manager | [email protected]
Additional Resources
Visit Ecology’s Terminal 115N Cleanup Site for more information.
