Gas Station cleanup site — Restorical Research
Arco 5246
5620 Martin Luther King Jr Way S, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1957. 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 fuel station since 1957, first with underground storage tanks installed that year and additional tanks added in 1974. Five USTs were removed in 1986, and extensive remediation followed under the Voluntary Cleanup Program — including excavation of approximately 1,168 tons of petroleum-impacted soil in 2005–2006, recovery of over 49,000 gallons of contaminated groundwater and floating hydrocarbons between 1989 and 2005, and groundwater monitoring spanning from 1991 through 2013. The property continues to operate as an ARCO AM/PM retail fuel station and convenience store. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address5620 Martin Luther King Jr Way S, Seattle, King County
Historical UseGas Station
Est. Operating Since1957
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons and lead detected in soil and groundwater from leaking underground storage tanks
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #11099

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 originated from underground storage tanks installed in 1957 and 1974 — nearly three decades before occurrence-based CGL policies gave way to claims-made forms with pollution exclusions. Lead detected in groundwater monitoring wells as far back as 1991 points to releases of leaded gasoline during the pre-1986 operational window. The documented remediation expenditures — tank removals, large-scale soil excavation, years of groundwater recovery and monitoring — represent costs that historical carriers who issued CGL policies during those early decades of operation 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.