Landfill cleanup site — Restorical Research
Vashon Island Landfill
18900 Westside Hwy SW, Vashon, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a landfill predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

The Vashon Island Landfill accepted municipal solid waste — refuse including plastic, metal, wood, glass, fiberglass, and other materials — and was already closed by at least 1979, when topographic maps identified it by name as a closed landfill. Remediation has included installation of final landfill covers in 1988 and 2001, along with decades of borehole and monitoring well construction, sealing, and restoration using bentonite, concrete, casings, and native backfill, with documented activity spanning 1983 through 2020. Cleanup work under the Standard Cleanup program remains ongoing. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Landfill
Address18900 Westside Hwy SW, Vashon, King County
Historical UseLandfill
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsLandfill leachate and decomposition byproducts from municipal solid waste (plastics, metals, wood, glass, fiberglass) in soil and groundwater
Media ImpactedSoil, Groundwater, Surface Water
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #1146

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.

This landfill received and buried waste well before 1986, the year after which occurrence-based Commercial General Liability policies began to include enforceable pollution exclusions. The documented remediation record — cover installations in 1988 and 2001, and monitoring well work extending through 2020 — reflects substantial expenditures traceable directly to waste disposal operations that predate that threshold. Historical carriers who issued CGL policies to the landfill operators or property owners during the pre-1986 operational window may be obligated both to recover past remediation costs and to fund the work that remains ahead.

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.