Industrial & Manufacturing cleanup site — Restorical Research
Boeing Isaacson Thompson
8701 E Marginal Way S, Tukwila, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility going back to 1917. Historical insurance policies issued during operations at this property and through 1986 could fund a cleanup — and recover costs already spent.

This property has hosted continuous heavy industrial operations since 1917, including sawmill operations, a galvanizing plant, wood preserving using heated arsenic and copper-zinc sulfate solutions — with process fluids discharged directly to the ground surface — steel fabrication, and aircraft manufacturing after Boeing acquired part of the site in 1984. Cleanup under Agreed Orders has included soil excavation of up to 3,000 cubic yards and 900 tons, removal of underground and aboveground storage tanks and sumps, stabilization of 20,000 cubic yards of soil, asphalt capping, in-place decommissioning of tanks using concrete slurry, and catch basin rerouting. Investigation and monitoring activities have been ongoing from at least 1991 through 2014 and beyond, and remediation continues. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
Address8701 E Marginal Way S, Tukwila, King County
Historical UseIndustrial & Manufacturing
Est. Operating Since1917
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsMetals (arsenic, copper, zinc) from wood preserving and galvanizing operations, and carcinogenic polycyclic aromatic hydrocarbons (cPAHs) from hydraulic oil releases in soil
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #1944

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.

Industrial contamination at this site — metals from decades of wood preserving and galvanizing, carcinogenic PAHs from hydraulic oil releases — traces to operations that began nearly seven decades before 1986, when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion. The successive operators who ran sawmills, wood treatment, galvanizing, and steel fabrication through that pre-1986 window were insured under policies that remain enforceable in Washington. With remediation already spanning more than two decades and cleanup still underway, the documented and future costs — excavation, stabilization, capping, long-term monitoring — represent obligations the historical carriers may be required both to reimburse and to continue funding.

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.