Heating Oil Tank cleanup site — Restorical Research
Block 95
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 1950. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This Seattle property was originally developed with residential buildings in the early 1900s, later demolished for construction of two medical office buildings in the 1950s. The medical offices were heated by oil-burning furnaces supported by two underground storage tanks with capacities of 6,000 and 7,000 gallons, and a parking garage was added in 1974. UST fill pipes were identified during a 2016 site reconnaissance, and one tank was uncovered during construction excavation. Groundwater monitoring has revealed diesel- and oil-range petroleum hydrocarbons exceeding MTCA Method A cleanup levels along with arsenic, and site investigation has also identified contamination migrating from an off-property upgradient source. Cleanup is underway through the Voluntary Cleanup Program. 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 Since1950
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsDiesel- and oil-range petroleum hydrocarbons (TPH) and arsenic detected in groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #17469

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.

Heating oil tanks at this property were installed in the 1950s to serve the medical office buildings — more than three decades before 1986, when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion. The petroleum contamination now documented in groundwater beneath the site is consistent with decades of UST operations during that insured period. Remediation costs already incurred and those still ahead under the Voluntary Cleanup Program represent expenditures that historical carriers who wrote CGL policies during the 1950s-through-1985 operational window 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.

Request more information on this property

Contact Us

This analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.