History

  • 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)