Heating Oil Tank cleanup site — Restorical Research
Harborview Hospital
Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a property with a heating oil tank going back to 1940. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

A 3,000-gallon heating oil underground storage tank was installed at the Harborview Medical Center property in the 1940s to serve the hospital's boiler system; the tank had fallen out of use by the 1950s. Diesel-range petroleum contamination was reported to Ecology in April 1991, triggering cleanup activities that included removal of 1,500 gallons of rainwater from the tank, rinsing and off-site disposal of the UST, and excavation of approximately 20 cubic yards of contaminated soil. Additional contaminated soils were likely removed during hospital redevelopment in the 1990s, with remedial reporting spanning from 1992 through 2006. Cleanup work at the site is ongoing. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Heating Oil Tank
AddressSeattle, King County
Historical UseHeating Oil Tank
Est. Operating Since1940
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsDiesel-range petroleum hydrocarbons from a heating oil UST detected in soil
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #8076

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 heating oil contamination at this property traces to a tank installed in the 1940s and operated through the 1950s — decades before 1986, when occurrence-based Commercial General Liability policies still carried no effective pollution exclusion in Washington. The remediation costs documented here — tank removal, soil excavation, and over a decade of investigation and reporting — arose from a release tied directly to that mid-century infrastructure. Historical carriers who issued CGL policies during the tank's operational life may be obligated both to recover past cleanup expenditures and to fund remediation still ahead.

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.