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 consisting of T-115N was part of the dredging and filling of the Duwamish River during the creation of the LDW. Additional filling (material unknown) was added in the early 1960s to expand T-115N to today’s size.
In 1963 the property was used for tin reclamation. The Port purchased the property in 1969, and tin recycling was carried out by various tenants over the years until Schnitzer Steel Industries ended tin operations in 1998. The area is currently leased to Gene Summy Lumber Company, a lumber distributor, and Transportation Agent Grid, LLP, for vehicle storage.
(Image courtesy of Washington State Department of Ecology)
Contamination Issue
Past operations and filling activities 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.c.
Why is the Port Doing this Cleanup?
Past operations and filling activities 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.
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.
