Gas Station cleanup site — Restorical Research
BP 11050
2535 S 320th 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 1964. 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 retail fueling station since the facility was built in 1964, with underground storage tanks — including a 12,000-gallon leaded gasoline tank — installed in 1983. A gasoline release was identified in 1988, triggering cleanup under the Voluntary Cleanup Program that has spanned more than two decades. Remediation has included UST-related soil excavation, recovery of approximately 150 gallons of free-product gasoline, soil vapor extraction and air sparging systems operated between 1994 and 2001 that removed an estimated 1,100 pounds of petroleum hydrocarbons, and ongoing groundwater monitoring since the early 1990s. The station remains in active commercial use as a fueling facility with a car wash. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address2535 S 320th St, Federal Way, King County
Historical UseGas Station
Est. Operating Since1964
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (gasoline, including leaded gasoline) detected in soil, groundwater, and soil vapor
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #8750

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 that were installed and operating well before 1986, at a facility built in 1964 and operated by Mobil through 1989. Occurrence-based CGL policies issued during that pre-1986 operational window carried no effective pollution exclusion under Washington law and remain enforceable today. More than two decades of documented remediation expenditures — product recovery, vapor extraction, air sparging, and long-term monitoring — represent costs that historical carriers who covered this facility during the contamination period may be obligated both to reimburse and to fund as cleanup continues.

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.