In-language text with short link or QR code
What is the history of T-115?
The T-115 Plant 1 Site is located along the western shore of the Lower
Duwamish Waterway and consists of 94 acres owned by the Port of Seattle.
Remedial Investigation
Feasibility Study
2. Decide
Clean Up Action Plan
1. Study
3. Act
Clean Up the Site
Monitoring and Site Use Controls
Reviews and De-Listing
Terminal 115
Terminal 115 Cleanup
Where is the Site?
Metals (arsenic, lead, other)
Polychlorinated biPhenyls (PCBs)
Volatile Organic Compounds (solvents, benzene)
Polycyclic Aromatic Hydrocarbons (PAHs)
What is the process?
Activities in this industrial corridor over many
decades have shaped the landscape we see today.
Under an Agreed Order (AO) with the Department of
Ecology, the Port of Seattle and The Boeing
Company are conducting a Remedial Investigation
(RI), which will lead to a Cleanup Action Plan to
create a cleaner waterway.
What is the cleanup goal?
Terminal 115 has had many uses across the
decades. From 1917 to 1970 a portion of the
Terminal was the site of the Boeing Plant 1, Boeing’s
first airplane facility where wood and metal airplanes
were manufactured. Other historic uses of the
property included retail gasoline service stations,
gravel and cement production, salvage yard, and
storage of log booms. Today, the Site is a cold
storage plant for seafood and a container terminal.
What contaminants are expected to be found?
The Remedial Investigation will identify the
exact contaminants.
We are here
Source: Department of Ecology
Terminal 115 Plant
Petroleum (diesel, gasoline)
Item No. 8e – attach 3
Meeting Date:June 11, 2024
info@terminal115.org
Terminal115.org
What is a
Remedial
Investigation?
The goal of a Remedial
Investigation (RI) is to
collect soil, groundwater,
and possibly soil gas quality
data to understand the
contaminants that exist,
where they are located, and
how they move through the
Site. The RI data will lead to
developing cleanup
alternatives for the
contaminated parts of the
Site.
2021-22
Compile available
environmental data into a Data
Summary Report, identify data
gaps, and prepare a preliminary
Conceptual Site Model
2022-23
Prepare a Remedial
Investigation Work Plan (RIWP)
to detail how environmental
media samples will be
collected and tested
2024
Complete the Remedial
Investigation (RI) in
accordance with the
approved RIWP
2025
Prepare RI report including
results of environmental
sampling, presentation of type,
nature, and extent of
contamination, and risks posed
by the contamination
2026
Prepare a Feasibility Study
(FS) that identifies and
evaluates Remedial Actions
(i.e. “clean up actions”) for
areas of contamination
2027
Hold public meeting and
comment period on the
combined Remedial
Investigation / Feasibility
Study
2028
Prepare a Draft Clean Up
Action Plan (DCAP)
We are here
T-115 CLEAN UP TIMELINE
Get in Touch
Roy Kuroiwa, Port of Seattle
kuroiwa.r@portseattle.org
Beau Johnson, Ecology Site Manager
BeJo461@ecy.wa.gov
Josh Bernthal, TRC
jbernthal@trccompanies.com
