Gas Station cleanup site — Restorical Research
Sea Mar Community Health Center Dominics Plaza
9635 Des Moines Memorial Dr, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1953. Historical insurance policies issued during those prior operations and through 1986 could recover the cleanup costs already paid.

This property hosted two generations of gasoline service stations with underground storage tanks from at least 1953 through 1978, along with a residential heating oil UST in use from approximately the 1950s through 2014. Site investigations confirmed petroleum hydrocarbon contamination — including benzene, gasoline-range, diesel-range, and other petroleum fractions — in groundwater beneath the property. Remediation under the Voluntary Cleanup Program brought all contaminant concentrations below regulatory cleanup levels, and the site has received a No Further Action determination. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address9635 Des Moines Memorial Dr, Seattle, King County
Historical UseGas Station
Est. Operating Since1953
StatusNo Further Action
Contamination & Investigation
Site Assessment Summary
ContaminantsBenzene, petroleum hydrocarbons (TPH-gasoline, TPH-diesel, TPH-other) detected in groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #13070

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.

Gasoline UST operations at this property began at least three decades before 1986, when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion. The petroleum releases that contaminated groundwater here — benzene, TPH-gasoline, TPH-diesel — originated from those pre-1986 underground storage tanks. Historical carriers who issued CGL policies during the 1953-through-1978 operational window may be obligated to reimburse the documented remediation costs incurred to bring the site to No Further Action status.

Restorical's role is to locate viable historical policies, determine whether a successful cost recovery claim is possible, and assist our clients and their legal counsel to obtain insurance coverage for costs already incurred. Restorical's forensic accounting team works to re-establish and document past cleanup expenditures, ensuring the strongest possible basis for recovery.

Recovering Costs from an Older Cleanup

If this site reached No Further Action years ago, the original cleanup expenditures may be difficult to reconstruct. Restorical's forensic accounting team specializes in re-establishing and documenting past cleanup costs — even decades later — to build the strongest possible basis for an insurance recovery claim.

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 — Cost Recovery
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim and negotiate recovery of costs already incurred. Restorical's forensic accounting team re-establishes and documents past cleanup expenditures, managing the claim process to ensure the insurance companies fulfill their obligation 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.