
COMMISSION AGENDA
T. Yoshitani, Chief Executive Officer
April 3, 2009
Page 2 of 4
BACKGROUND
Terminal 115 is located along the Lower Duwamish Waterway (LDW), which is a listed
Superfund site. The U.S. Environmental Protection Agency (EPA) is the lead agency for in-
water (i.e., sediment) assessment and cleanup, while the State Department of Ecology is the lead
agency for source control for adjacent and upland sites to the LDW. Assessment activities
conducted as part of the investigation of the LDW sediments have identified a number of
localized contaminated areas (often referred to as Early Action Areas or EAAs). One of these
areas of localized contaminated sediments, called Glacier Bay because of its proximity to the
property owned by Glacier Northwest, is adjacent to and north of the northern portion of T115.
T115N was the site of a tin reclamation facility from approximately 1963 to 1998 under a variety
of Port tenants. The industrial operation utilized a number of hazardous substances, including
sodium hydroxide, spent plating solution, lacquer sludge and “black mud.” Limited information
exists about the degree of contamination of the soil and groundwater at the site. In 1998, a site
hazard assessment was conducted by Seattle-King County Department of Public Health. Sites
are ranked on a scale of 1 to 5, with 1 representing the highest level of risk and 5 the lowest.
T115N was ranked as a 5.
On January 20, 2009, Ecology issued a “Notice of Potential Liability under the Model Toxics
Control Act (MTCA) for the Release of Hazardous Substances and Notice of Intent to Conduct
Site Hazard Assessment” for Terminal 115 N. The purpose of the Notice is to provide the Port
with the opportunity to comment on Ecology’s proposed findings. Ecology stated its belief that a
release of hazardous substances had occurred at the site that posed a threat to human health or
the environment, and that further action was necessary. Ecology proposed to find the Port liable
as a potentially liable party (PLP) because it is the current owner of the property. Ecology’s
proposed next steps were (1) initiate negotiations for an Agreed Order to further evaluate specific
levels and areas of contamination; and (2) “clean the site up to standards.”
In its response, the Port acknowledged that it is nominally a PLP because it is the property owner
and because there has been one sample that exceeded MTCA standards. However, the Port
objected to Ecology’s determination that this was sufficient to find that the site posed a threat to
human health or the environment.
PROJECT SCOPE OF WORK AND SCHEDULE
The Port believes that further sampling is necessary in order to determine the nature and extent
of contamination at the site. The Port has proposed to Ecology that this sampling be conducted
as an independent investigation. The Port will report the results to Ecology on a schedule that
will allow both parties to evaluate the additional data and make a knowledgeable decision about
the appropriate next steps.