Gas Station cleanup site — Restorical Research
Brown Bear Car Wash Interbay
3435 15th Ave W, 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 at least three gasoline service stations with underground storage tanks and fueling islands from the 1930s through the 1970s. Cleanup activities have been underway since 1986 and include multiple UST removals, excavation of over 1,300 cubic yards of contaminated soil, and on-site bioremediation. A previous No Further Action determination was rescinded in 2024 after discovery of additional petroleum impacts, and a new Cleanup Action Plan calls for extensive soil excavation to depths of 7–20 feet, installation of a vapor intrusion mitigation system, ongoing groundwater and indoor air monitoring, and an Environmental Covenant restricting future site use. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address3435 15th Ave W, Seattle, King County
Historical UseGas Station
Est. Operating Since1930
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons from leaking USTs detected in soil, groundwater, and soil vapor
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #5138

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.

Petroleum contamination at this property originated from fueling operations that began in the 1930s — more than five decades before occurrence-based CGL policies gave way to claims-made forms with absolute pollution exclusions. Four decades of documented remediation expenditures have already been incurred, and the 2024 rescission of the site's NFA status means a new round of cleanup costs — deep excavation, vapor mitigation, long-term monitoring — is now committed. Historical carriers whose CGL policies were in force during the decades of active fueling operations may be obligated both to recover past remediation costs and to fund the cleanup work that lies 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.