Gas Station cleanup site — Restorical Research
Vashon Allied Arts
19704 Vashon Hwy SW 9825 SW Cemetery Rd, Vashon, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1929. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

This property was the location of a former service station whose underground storage tanks are estimated to have been installed in the late 1920s or early 1930s, and a third heating oil tank of approximately 500 gallons remains abandoned in place. A 2015 investigation found soil samples clean but groundwater above MTCA A cleanup levels for diesel and motor oil; lead was also detected in soil associated with the former gasoline tanks, consistent with leaded-fuel use. Remediation to date has been limited to removal of the two service-station USTs (500 and 750 gallons capacity) and backfilling of the excavation — no active cleanup of the groundwater contamination has commenced. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address19704 Vashon Hwy SW 9825 SW Cemetery Rd, Vashon, King County
Historical UseGas Station
Est. Operating Since1929
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (diesel and motor oil) in groundwater above MTCA A cleanup levels; lead detected in soil from former gasoline USTs
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #12841

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 underground storage tanks at this property were in service by the late 1920s or early 1930s — decades before 1986, when occurrence-based CGL policies still lacked effective pollution exclusions in Washington. Lead in the soil confirms the contamination originated during the leaded-gasoline era, squarely within the window when those policies were being issued. Groundwater above MTCA A cleanup levels for diesel and motor oil remains unaddressed, meaning investigation, design, and active remediation costs all lie ahead. Historical carriers whose policies covered this service station during its operational decades may be obligated to fund those forthcoming expenditures.

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.