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 recover the cleanup costs already paid.
This residential property in Bellevue contained a 300-gallon steel underground storage tank used for heating oil. Under the Voluntary Cleanup Program, the UST was removed in November 1999 and 514.9 tons of petroleum-contaminated soil were excavated. A small volume of contaminated soil — less than 10 cubic yards — remains beneath the residence foundation, managed through a restrictive covenant, periodic reviews, and the existing building serving as a protective barrier. The site has received a No Further Action determination. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.
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 an underground storage tank installed and operated well before 1986, during the era when occurrence-based Commercial General Liability policies carried no effective pollution exclusion. The documented remediation expenditures — tank removal, excavation of over 500 tons of contaminated soil, and the institutional controls now governing the residual contamination — are costs tied directly to that pre-1986 release. Historical CGL carriers who covered the property during the tank's operational life may still bear obligation for those cleanup costs.
Restorical's role is to locate viable historical policies, determine whether a successful cost recovery claim is possible, and assist our clients and their legal counsel to obtain insurance coverage for costs already incurred. Restorical's forensic accounting team works to re-establish and document past cleanup expenditures, ensuring the strongest possible basis for recovery.
Recovering Costs from an Older Cleanup
If this site reached No Further Action years ago, the original cleanup expenditures may be difficult to reconstruct. Restorical's forensic accounting team specializes in re-establishing and documenting past cleanup costs — even decades later — to build the strongest possible basis for an insurance recovery claim.
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
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Contact UsThis analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.


