Heating Oil Tank cleanup site — Restorical Research
Seattle Childrens Hospital
4800 Sand Point Way NE, 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 1951. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

Three fuel oil underground storage tanks were installed at this property in 1951 to serve a hospital boiler room, with two of those tanks replaced in 1974 and all tanks ultimately removed in 1993. Foundation excavation in 2016 uncovered petroleum-contaminated soils within the former UST excavation area, prompting formal cleanup under the Standard Cleanup program. Quarterly groundwater monitoring has been conducted, and Monitored Natural Attenuation has been proposed as the remedial strategy for residual groundwater impacts. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Heating Oil Tank
Address4800 Sand Point Way NE, Seattle, King County
Historical UseHeating Oil Tank
Est. Operating Since1951
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsDiesel range petroleum hydrocarbons from heating oil USTs detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #14791

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 diesel range petroleum hydrocarbons found in soil and groundwater here trace directly to fuel oil tanks installed in 1951 and operated for more than three decades before 1986, when occurrence-based Commercial General Liability policies still lacked effective pollution exclusions. Carriers who issued CGL policies to the hospital or its prior operators during that pre-1986 operational window wrote those policies on an occurrence basis, leaving them potentially obligated for contamination that originated then. The remediation costs already incurred — UST removals, soil excavation, and ongoing groundwater monitoring — and those still ahead represent expenditures that historical carriers may be obligated both to recover and to fund going forward.

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.