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 Mercer Island property housed an underground storage tank that leaked heating oil into the surrounding soil and groundwater. Under the Voluntary Cleanup Program, the owner undertook independent remedial action — including UST removal, soil excavation, and associated remediation — followed by groundwater sampling conducted over a multi-year period from 1995 through 2000. Ecology determined that the heating oil release no longer poses a threat to human health or the environment, and the site was granted No Further Action status. 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.
A heating oil UST discovered leaking in 1995 was almost certainly installed and operating well before 1986, when occurrence-based Commercial General Liability policies were still the industry standard and contained no effective pollution exclusion. The documented cleanup at this property — tank removal, soil excavation, and years of groundwater monitoring — represents remediation expenditures tied directly to a release from those historical operations. Historical carriers whose policies were in force during the tank's pre-1986 operating years may still bear obligations to recover those 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.


