Gas Station cleanup site — Restorical Research
Shell 120698
1520 S 348th St, Federal Way, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1968. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property has operated as a Shell-branded gasoline service station and convenience store since 1968, with facilities that included two dispenser islands, three 10,000-gallon gasoline USTs, and one 10,000-gallon diesel UST. Cleanup under the Voluntary Cleanup Program has included the excavation and removal of four 10,000-gallon underground storage tanks and associated piping, removal of 400 cubic yards of contaminated soil, offsite treatment of contaminated rinsate water, and decommissioning of a vapor extraction system. Extensive groundwater monitoring wells are in place and installation of a new remediation system is underway. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address1520 S 348th St, Federal Way, King County
Historical UseGas Station
Est. Operating Since1968
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (gasoline and diesel) from leaking USTs detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #5438

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 gasoline and diesel storage operations that began in 1968 — nearly two decades before occurrence-based CGL policies gave way to claims-made forms with absolute pollution exclusions. The contamination was serious enough to trigger a LUST listing in 1993, and the remediation costs have compounded over decades: tank removals, large-scale soil excavation, vapor extraction, groundwater monitoring, and now a new remediation system still being installed. Historical carriers who wrote CGL policies covering this station during its pre-1986 operational window may be obligated both to recover past cleanup expenditures and to fund the remediation work that continues today.

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.