Gas Station cleanup site — Restorical Research
Shell at SeaTac
Seatac, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station predating 1986. Historical insurance policies issued during operations at this property and through 1986 could fund a cleanup — and recover costs already spent.

This property has operated as a gasoline service station since before 1986, with five underground storage tanks and a dispenser island serving retail fuel sales alongside a Budget Rent-A-Car operation. Cleanup under the Voluntary Cleanup Program has included removal of all five USTs in 1992, excavation of approximately 960 cubic yards of petroleum-contaminated soil with ex-situ thermal desorption treatment, operation of a pump-and-treat system from 1999 to 2001, groundwater and light petroleum hydrocarbon recovery, and extensive groundwater monitoring and soil borings conducted from 1992 through at least 2007. The property remains in active commercial use as a Shell gasoline service station. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
AddressSeatac, King County
Historical UseGas Station
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsGasoline-range petroleum hydrocarbons (TPH-G, BTEX) and lead detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #5703

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 contamination at this site — gasoline-range hydrocarbons, BTEX, and lead indicative of leaded gasoline — originated from underground storage tank operations that predate 1986, when occurrence-based Commercial General Liability policies carried no effective pollution exclusion in Washington. More than fifteen years of documented remediation expenditures — tank removals, large-scale soil excavation and thermal treatment, pump-and-treat operations, and long-term groundwater monitoring — were incurred to address releases tied to those pre-1986 operations. Historical carriers who issued CGL policies during that window may be obligated both to recover past cleanup costs and to fund remediation work still 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.