
COMMISSION AGENDA
Tay Yoshitani, Chief Executive Officer
May 17, 2011
Page 3 of 8
In 1999, the Port, under EPA supervision, carried out what was believed at the time to be a final
cleanup of the upland T-117 property. In 2000, the Port completed its purchase of the property from
Marlarkey. Following EPA‟s designation of the T-117 sediment site as an “Early Action Area,” the
Port and the City entered into a Memorandum of Agreement in May 2003 to jointly fund the
investigation and remediation of contamination within the sediments and in the adjoining bank area.
In December 2005, the Port, the City, and the EPA entered into an “Administrative Settlement
Agreement and Order on Consent (ASAOC) for the T-117 Early Action Area Removal Action” to
perform the work in the sediment and bank areas only. The Agreement required the Port and the
City to clean up sediments, intertidal mudflats, bank, and a limited portion of the adjacent uplands.
During the investigation of the bank area, significant contamination above action levels was
discovered on the T-117 uplands. In 2005, EPA and the Port agreed to pursue additional
investigation of the level and extent of the contamination on the T-117 uplands through an ASAOC
for the Upland Investigation. This investigation did identify additional upland areas that required
remedial actions. Based on this subsequent upland investigation, in 2007 the SOW of the 2005
ASAOC was amended, and the T-117 cleanup site formally expanded to include three distinct
subareas: the Sediments, T-117 Uplands, and Adjacent Streets. In addition, EPA issued a letter
(April 12, 2007) directing the Port to clean up the former industrial property to meet unrestricted
(e.g., residential) cleanup standards.
In addition, the 2005/2006 upland investigations also discovered elevated PCB concentrations,
prompting EPA to issue the 2006 ASAOC for Time Critical Removal Action (TCRA, e.g., interim
removal action). The TCRA was issued to quickly remove upland soil that contained very high
concentrations of PCBs in order to: a) prevent human exposure and b) remove contaminant sources
that are readily available to the waterway. This work was successfully completed in the winter of
2006.
In 2008, the Commission authorized a settlement agreement with Malarkey and the City of Seattle
(among others). The relevant portion of the settlement agreement is that future costs were allocated
between the City and the Port as follows: the City would pay 100 percent of the costs of the
Adjacent Streets and yards, and the Port and the City would share the costs of the Sediments and
Uplands, with the Port paying 60 percent of the costs and the City paying 40 percent. The Port also
received $9.8 million as part of the Malarkey/City settlement.
The basis of the final design, cleanup, and long-term monitoring and maintenance for the T-117
EAA Remedial Design and Remedial Action was presented in the T-117 Sediment, Uplands, and
Adjacent Streets EE/CA, dated June 3, 2010. The final EE/CA was approved by EPA with the
issuance of the EPA Action Memorandum, dated September 30, 2010. The EPA Action Memo
selected Alternative 2 in the EE/CA. Alternative 2 is described as a comprehensive Upland (soil)
and Sediment Removal and Backfilling (no capping) that meets unrestricted (e.g., residential)
cleanup standards. The alternative provides a comprehensive soil and sediment cleanup approach
that requires no significant long-term monitoring or administrative controls, regardless of the
ultimate land use (e.g., industrial/commercial, residential, or other).