Gas Station cleanup site — Restorical Research
Seattle DOT Dexter Parcel
615 Dexter Ave N, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1930. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property hosted a gasoline station and automobile repair service station from approximately 1930 to the mid-1940s, and petroleum contamination — gasoline range organics (GRO), diesel range organics (DRO), and benzene — in soil and groundwater has been directly linked to that former operation. Underground storage tanks were documented on the property as of 1950 and remained until their removal in 1997. Cleanup under the Voluntary Cleanup Program has included excavation and off-site disposal of approximately 3,000 cubic yards of contaminated soil, in-situ enhanced bioremediation, monitored natural attenuation for groundwater, vapor barrier installation, and institutional controls, with compliance monitoring and periodic reviews ongoing. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address615 Dexter Ave N, Seattle, King County
Historical UseGas Station
Est. Operating Since1930
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsGasoline range organics (GRO), diesel range organics (DRO), and benzene detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #14785

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 petroleum releases at this site trace to a gasoline station operating as early as 1930 — more than five decades before 1986, when occurrence-based Commercial General Liability policies were still written without effective pollution exclusions. Underground storage tanks tied to those pre-1986 operations were in the ground until 1997, creating a decades-long contamination window squarely within the coverage period of historical CGL policies. The documented remediation expenditures — soil removal, bioremediation, vapor barrier construction, institutional controls, and long-term monitoring — represent costs that historical carriers whose policies were in force during the station's operational years may still 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.