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T-117 Story
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2016
Streets cleanup and stormwater improvements completed
Uplands restoration design still in process
2015
Upland and Sediment cleanup completed
Streets cleanup & Stormwater improvement construction begins
2014
Streets & Stormwater design finalized
2013
Neighborhood Yards cleanup construction completed
Upland and Sediment cleanup begins
Uplands restoration design begins
2012
Uplands cleanup design is completed
Neighborhood Yards cleanup design and construction begins
2011
Upland and Sediment cleanup design begins
2010
Final EE/CA released to the public
Public meeting held in June to provide opportunities for public comments on draft EE/CA
Final Action Memorandum issued in September outlining the approved cleanup design
2009
Additional sampling and analysis to determine levels of PCBs and dioxins in streets and yards adjacent to T-117
EE/CA development delayed awaiting sampling and analysis results
Boundaries for PCB cleanup established
Dioxin investigations ongoing; will be addressed separately from Early Action Area cleanup
Port and City submit revised draft EE/CA to EPA and Ecology for review
2008
Port conducts interim repair of eroded bank on T-117
Dioxin levels above state cleanup standard is found in soil samples T-117 and adjacent streets and yards
2007
Community involvement results in Port Commission changing end use of site to unrestricted, resulting in need for revised cleanup plan
Port Commission commits to habitat restoration after site cleanup
EPA directs Port and City to revise EE/CA to reflect unrestricted use as cleanup level
Port and City begin revising EE/CA for the cleanup action at T-117
2006
Additional PCBs discovered on site and in streets
Second emergency Superfund Cleanup Action conducted for PCB contaminated soil
2005
EE/CA submitted to EPA, based on industrial use cleanup standard
EPA approved the EE/CA and issued an action memorandum
2004 – 2005
City of Seattle discovered PCBs in some adjacent streets and yards
City removed gravel, paved over some contamination, cleaned streets, installed a temporary stormwater collection and treatment system and cleaned two residential yards
2003
T-117 selected as an Early Action Area due to elevated concentrations of PCBs
1999 - 2003
Port removal of contaminated soil, asphalt, oil and pipes
Port removal of a non-leaking underground diesel storage tank
Port removal of drums and debris from the offshore intertidal area
1999
Port of Seattle acquired the site
EPA-directed emergency Superfund Cleanup Action was conducted by the Port to remove soil contaminated with PCBs
1997
Malarkey Asphalt Company decommissioned tanks and equipment and removed asbestos
1937 – 1993
Asphalt manufacturing (Duwamish Manufacturing Company and Malarkey Asphalt Company)
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