Bulk Plant cleanup site — Restorical Research
Boeing North Field JP4 Tanks
Ellis Ave & E Marginal Way, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a bulk fuel distribution terminal predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property served as a JP-4 jet fuel storage facility at Boeing's North Field in Seattle, adjacent to Boeing Field (King County International Airport). JP-4 was the standard military and commercial aviation fuel from the early 1950s through the late 1970s and into the 1990s, when JP-8 replaced it — placing the fuel storage infrastructure at this site squarely within that pre-1986 operational window. Petroleum products have been confirmed in groundwater beneath the property, and the site is now under Washington's Standard Cleanup program with remediation underway. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Bulk Plant
AddressEllis Ave & E Marginal Way, Seattle, King County
Historical UseBulk Plant
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum products (non-halogenated organics) confirmed in groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #4393

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 JP-4 fuel storage operations at this Boeing facility are consistent with installation and active use decades before 1986, when occurrence-based Commercial General Liability policies carried no effective pollution exclusion. Confirmed petroleum contamination in groundwater — the direct legacy of those fuel storage operations — has triggered cleanup obligations under Washington's Standard Cleanup program. Historical carriers who insured the fuel storage operations during the pre-1986 window may be obligated to cover both the remediation expenditures already incurred and the costs of ongoing cleanup.

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.