This property has a documented history as a gasoline service station predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.
This Mercer Island property operated as a retail gasoline fueling station with underground storage tanks for gasoline, diesel, and waste oil. USTs were removed in 1991 after the site was reported to the state's leaking underground storage tank list in 1990, and a major remediation phase in 2004 excavated 4,689 tons of petroleum-contaminated soil and 1,154 tons of solvent-contaminated soil. A groundwater interceptor trench and treatment system were installed that same year, with quarterly groundwater monitoring ongoing since October 2004 under the Voluntary Cleanup Program. 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.
Petroleum contamination at this property traces to underground storage tanks that were in service well before 1986, when occurrence-based Commercial General Liability policies carried no effective pollution exclusion in Washington. The scale of documented remediation — thousands of tons of contaminated soil removed, a groundwater interception and treatment system constructed, and years of ongoing monitoring — represents substantial cleanup expenditures tied to releases that began during the pre-1986 policy window. Historical carriers who covered the fueling operation during that period may be obligated both to reimburse past remediation costs and to fund the cleanup work that remains.
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
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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.


