Gas Station cleanup site — Restorical Research
Gull 240
Tukwila, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1974. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

The south parcel of this Tukwila property operated as the Gull service station from 1974 to 1987, with three 10,000-gallon underground storage tanks dispensing gasoline throughout that period. The USTs were decommissioned in 1987, and a petroleum release was reported to Ecology in 1996 following a Phase II site assessment, which resulted in assignment of Cleanup Site ID 10552. Remediation to date has included excavation of approximately 3,000 cubic yards of impacted soil and multiple USTs, on-site solid phase treatment of 1,500 cubic yards of soil, operation of a soil vapor extraction system that has recovered an estimated 1,200 pounds of gasoline, and multi-year groundwater monitoring and well decommissioning. Cleanup work is ongoing. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
AddressTukwila, King County
Historical UseGas Station
Est. Operating Since1974
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (gasoline, TPH) from leaking USTs detected in soil, groundwater, and soil vapor
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #10552

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 gasoline contamination here originates from underground storage tanks installed and operated from 1974 through 1987 — entirely within the window when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion. Although the release was not reported until 1996, the contamination traces directly to pre-1986 UST operations, which is the triggering event historical CGL carriers remain potentially obligated to address. The documented remediation expenditures at this site — UST removals, soil excavation and treatment, vapor extraction, and ongoing groundwater monitoring — represent costs the historical carriers may be obligated both to recover 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.