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 fund a cleanup.
This property, now occupied by a Washington State Department of Information Services office building, was formerly part of a residential neighborhood where home heating oil was stored in underground tanks. During excavation for the new building in 2009, workers encountered 13 separate pockets of petroleum-contaminated soils, including two underground storage tanks associated with that historical residential heating oil use; remediation required the removal of 4,313 tons of contaminated material across those areas. Ten of the thirteen contamination zones were fully remediated, while residual contamination in three inaccessible areas was addressed by capping with impervious surfaces, with the assessment report completed in 2013. Residual contamination remains and the site carries an Awaiting Cleanup designation. 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 petroleum contamination here traces to residential heating oil tanks installed and operated in a former neighborhood — a use that predates 1986 and the regulatory changes that stripped effective pollution coverage from Commercial General Liability policies. The discovery of two buried USTs and 4,313 tons of affected soil in 2009 is characteristic of the slow, decades-long accumulation of contamination that pre-1986 occurrence-based CGL policies were written to cover. Parties responsible for the remaining capped contamination and any future remediation costs may have standing to pursue historical carriers whose policies were in force when those tanks were actively in use.
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.


