Gas Station cleanup site — Restorical Research
Unocal 306568
700 Queen Anne 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 1922. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property operated as Unocal Service Station 0255 from 1922 through 1991, with gasoline USTs, hydraulic hoists, a grease pit, a waste oil tank, and product lines serving retail fuel customers for nearly seven decades. Cleanup under the Voluntary Cleanup Program has included removal of six underground storage tanks and associated infrastructure, excavation of approximately 553 cubic yards of contaminated soil, and ongoing groundwater treatment including hand-bailing of free product. Additional remediation — pump and treat with air sparging and soil vapor extraction — has been proposed and is expected to require long-term monitoring. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address700 Queen Anne Ave N, Seattle, King County
Historical UseGas Station
Est. Operating Since1922
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (free product, TPH) from leaking USTs detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #6364

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 site traces to underground storage tanks and product lines installed as early as 1922, with steel USTs and lines added in the mid-1960s — all decades before 1986, when occurrence-based CGL policies still carried no effective pollution exclusion. The documented remediation costs already incurred — tank removals, soil excavation, free-product recovery — and the substantial costs still ahead for pump-and-treat, air sparging, and vapor extraction represent expenditures that historical carriers who insured this station during its pre-1986 operating years may be obligated both to reimburse and to fund going forward.

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.