COMMISSION AGENDA – Action Item No. _6e___ Page 2 of 6
Meeting Date: May 12, 2020
Template revised June 27, 2019 (Diversity in Contracting).
Historically, the T-108 site was a municipal sewage treatment plant between 1938 and 1969,
first owned and operated by the City then later by Metro/King County. In 1975, the U.S. Army
Corps of Engineers negotiated an agreement with Chiyoda, the property owner at that time, to
dispose of dredge spoils containing PCBs at T-108. The dredge spoils came from Slip 1, about
2,400 feet upstream of T-108, where a General Service Administration contractor had dropped
a transformer containing 265 gallons of concentrated PCB fluid.
The Port purchased the property in 1984. As the current owner, the Port has performed site
investigations in coordination with the Department of Ecology (Ecology) to study and address
possible source control issues. More recently, Ecology asked the U.S. Environmental Protection
Agency (EPA) to take the lead on this site due to the federal government’s role in contributing
to suspected contamination at the site. Subsequently, EPA directed the Port to perform a
Preliminary Assessment and Site Investigation (PA-SI), which was completed in December 2018.
Using the results of the PA-SI, EPA identified several Potential Responsible Parties (PRPs) that
may have liability on the future investigation and cleanup of T-108; some, including the Port
and City, will be signatories to the Order. These PRPs include the Port, City of Seattle, King
County, Chevron, Chiyoda, LaFarge, and the US Air Force. The Port, City and County negotiated
with EPA to reach agreement on the Order to perform an Engineering Evaluation and Cost
Analysis (EE/CA). An EE/CA is similar to a state performed Remedial Investigation and
Feasibility Study (RI/FS).
The Port, City and County will share responsibility to perform the requirements of the EPA
Order and each will contribute towards the costs to prepare an EE/CA. The cost-sharing
percentages are subject to reallocation in the future. Final allocation of the shared EE/CA costs
between the Port, City and County will be determined after more is known about the site, and
the parties will pursue reimbursement from other, non-participating PRPs as well. The Port will
procure the environmental consulting firm to perform the EE/CA work using our public
procurement process and the Port will hold the contract with the consultant. All invoicing and
payables will be handled by the Port and the appropriate portion reimbursed by the City and
County.
Today, most of the terminal is used by our tenant as an off-dock facility for storage and
maintenance of empty cargo containers.
Funding for this work was included in the 2020-2024 Environmental Remediation Liability (ERL)
Program. Accordingly, additional funding is not requested at this time.
JUSTIFICATION
The EPA Order is a binding agreement to perform work by the Port, therefore the signing of the
EPA Order requires Commission authorization. The project will formally initiate the process of
determining upland site cleanup and/or source control efforts at T-108, as necessary and
required, to meet EPA and Ecology’s source control objectives and requirements as related to