Heating Oil Tank cleanup site — Restorical Research
WA DOT South Atlantic St
S Atlantic St & Alaskan Way S, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a property with a heating oil tank predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

An orphan 1,000-gallon underground heating oil tank was discovered during excavation at this property, with approximately 300 gallons of bunker fuel still inside. The tank showed multiple rusted-out holes and staining suggesting it had leaked while in the ground; soil sampling confirmed TPHd and TPHo above MTCA Method A cleanup levels. Remediation included decommissioning and removal of the tank, excavation of approximately 30 cubic yards of petroleum-impacted soil, and a planned concrete cap — 13 inches of cement concrete pavement — over the residual contamination that remains on site. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Heating Oil Tank
AddressS Atlantic St & Alaskan Way S, Seattle, King County
Historical UseHeating Oil Tank
Est. Operating SincePre-1986
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (TPHd, TPHo) from a leaking underground heating oil tank detected in soil
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #12505

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 orphan designation is the defining fact here: because no current owner or operator has been linked to the tank's installation or years of in-ground use, the practical route to cleanup cost recovery runs through the historical insurance record — specifically, the occurrence-based CGL policies held by whoever operated or maintained the tank before 1986. The rusted-out holes and soil staining at this location establish that contamination was accumulating over an extended period of underground operation, placing the triggering occurrence within that pre-1986 policy window. The documented remediation costs — tank decommissioning, soil excavation, and the planned concrete cap over residual petroleum hydrocarbons — are precisely the expenditures those historical policies may be obligated to fund.

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.