Heating Oil Tank cleanup site — Restorical Research
Cissel-Johnson
6033 Beach Dr SW, 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 — and recover costs already spent.

This single-family residential property at 6033 Beach Dr SW was served by a 1,700-gallon underground heating oil tank that, based on its heavily corroded and pitted condition at removal, had been in service since approximately 1970. A release was reported in 1993; the tank was excavated in January 1995 and a remedial investigation completed that same year. Cleanup activities have included removal of at least 400 tons of petroleum-contaminated soil, recovery of 72 gallons of free product via an oil/water separator and pumping system, and multiple rounds of in-situ bioremediation through 1997, with groundwater monitoring continuing beyond that point. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Heating Oil Tank
Address6033 Beach Dr SW, Seattle, King County
Historical UseHeating Oil Tank
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsHeating oil (petroleum hydrocarbons) from a leaking underground storage tank detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #14403

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 originated from a residential tank installed and operated well before 1986, when occurrence-based Commercial General Liability policies carried no effective pollution exclusion. Substantial remediation costs have already accumulated — UST removal, soil excavation, product recovery, and bioremediation — and the site carries an active Cleanup Started status, meaning additional monitoring and potential further remediation expenditures remain ahead. Historical carriers whose policies covered this property during the tank's pre-1986 operational years may be obligated both to address the cleanup costs already incurred and to fund the work that has yet to be completed.

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.