This property has a documented history as a gasoline service station going back to 1970. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.
This property was developed as the Seattle Hilton Hotel and Parking Garage around 1970, with two 2,000-gallon gasoline underground storage tanks installed along the eastern property line at the time of construction. One tank leaked and was replaced in the early 1970s; both were abandoned in place with cement slurry in 1985. Cleanup activities under the Voluntary Cleanup Program have included soil excavation exceeding 1,900 cubic yards across multiple construction projects, installation of a single-phase skimmer pump system for free product recovery, planned follow-up groundwater treatment, and at least two years of scheduled quarterly groundwater monitoring supplemented by natural attenuation. 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 gasoline USTs at this site were installed, operated, and confirmed to have leaked between 1970 and 1985 — entirely within the window when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion in Washington. The documented release includes lead alongside gasoline, a combination characteristic of fuel formulations from that era that further anchors the contamination to those pre-1986 operations. The remediation costs incurred and still forthcoming — soil excavation, free product recovery, groundwater treatment, and long-term monitoring — represent expenditures that historical carriers who issued CGL policies to the hotel and its parking facility during those years may be obligated to fund.
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.


