Lora Lake Apartments

Floyd|Snider is assisting the Port of Seattle (Port) Aviation Environmental Programs Division with remedial actions at the Lora Lake Apartments Site (Site), located immediately northwest of the Seattle Tacoma International Airport (STIA) in Burien, Washington. The Site is the former location of a barrel washing operation that cleaned and reconditioned barrels in the 1940s to 1950s before it was converted into an auto storage and wrecking yard. The Site was converted to apartments in the 1980s, and it operated until closure associated with STIA 3rd Runway expansion in 2007. Floyd|Snider is currently assisting the Port with development of a Remedial Investigation and Feasibility Study and Cleanup Action Plan to address contamination in soil, groundwater, and freshwater lake sediments at the Site. Activities conducted to date have included field data collection and evaluation of site soil and groundwater, completion of a stormwater sampling interim action investigation, collection of sediment bioassay and analytical samples by diver-assisted and freeze coring methods, coordination with Washington State Department of Ecology (Ecology), evaluation of the applicability of Terrestrial Ecological Evaluations, chemometric evaluation of site data to identify if site dioxin/furan contamination has a unique source fingerprint, and design and evaluation of remedial options for site cleanup. Floyd|Snider will assist the Port with remedial design, implementation, and development of a Compliance Monitoring program following Ecology approval and finalization of the Cleanup Action Plan for the Site. Remedial construction is anticipated to begin in 2017.


  • Remedial Investigation/Feasibility Study 
  • Data Gaps Investigation/Field Sampling
  • Stormwater Interim Action
  • Agency Coordination and Negotiation

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