Industrial & Manufacturing cleanup site — Restorical Research
West Waterway Lumber Co
3546 W Marginal Way SW, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

This property operated historically as West Waterway Lumber Co and, under an alternate name, as Island Tug & Barge — industrial and maritime operations that used underground storage tanks to fuel private on-site fleets. Investigation confirmed a historic release of petroleum, with soil samples exceeding MTCA screening levels for gasoline; no active releases were identified at the time of discovery. The site is currently awaiting cleanup, with plans to evaluate remedial alternatives and enter the Voluntary Cleanup Program to pursue a No Further Action determination. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
Address3546 W Marginal Way SW, Seattle, King County
Historical UseIndustrial & Manufacturing
Est. Operating SincePre-1986
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (gasoline) from historic underground storage tanks detected in soil
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #12988

Why Historical Insurance Policies May Be Accessible

Pre-1986 Commercial General Liability (CGL) policies were occurrence-based and did not contain an effective pollution exclusion in Washington. If contamination occurred while those policies were active, those historical insurance carriers may still have a legal obligation to fund the cleanup costs, even if the business closed or the property changed hands.

The gasoline contamination at this property originated from underground storage tanks associated with historical lumber and maritime operations that predate 1986, the threshold year for occurrence-based Commercial General Liability coverage without effective pollution exclusions. Ecology's own characterization — a historic release with no active discharges — confirms the contamination is tied to the pre-1986 operational period rather than any recent incident. The remediation costs now confronting this property — site investigation, evaluation of cleanup alternatives, and eventual remediation — represent expenditures that historical carriers whose CGL policies were in force during those operations may be obligated to fund.

Restorical's role is to locate viable historical policies, determine whether a successful coverage claim is possible, and assist our clients and their legal counsel to obtain insurance coverage. Restorical then manages the claim, including accounting, to ensure the cleanup is funded in a timely manner.

What We Look For

  • Historical insurance policies (pre-1986)
  • Policy numbers, carrier names, and coverage periods
  • Connection between contamination timing and policy period
  • Evidence linking cleanup obligation to insured activity

What We Deliver

  • Historical Coverage Chart
  • Trigger Analysis & Property/Policy Nexus
  • Coverage strategy with recommendations
  • Insurance funding for your remediation
  • Claims Management & Forensic Accounting

The Restorical Proven Process

Task 1 — Research and Analysis
Restorical searches for viable historical insurance policies, researches the site history, analyzes the contamination impacts, and underwrites potential coverage — including a proprietary trigger analysis. At the end of Task 1, we provide a clear yes or no on whether a successful cost recovery is possible, along with a strategy and recommendation specific to your situation, even if you are not the policyholder.
Task 2 — Coverage and Funding
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim, negotiate and secure insurance coverage. Restorical will manage the ongoing claim process, including accounting to ensure the insurance companies are funding your remediation in a timely manner.

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This analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.