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 recover the cleanup costs already paid.
This property operated as Unocal Station #4830 in Federal Way, King County, with underground storage tanks used for fuel dispensing at the site. Independent remedial action — including a UST Closure Assessment and Phase II Investigation completed in December 1991 — was carried out between 1990 and 1993, addressing contamination associated with the leaking tanks. Washington State Ecology issued a No Further Action determination upon completion of those remedial activities under the Standard 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.
The underground storage tanks at this former Unocal station were installed and in active fuel-dispensing service well before 1986, when occurrence-based Commercial General Liability policies carried no effective pollution exclusion. The documented remediation — UST closure, site assessment, and Phase II investigation — was undertaken specifically to address petroleum releases tied to those pre-1986 operations. Historical carriers who issued CGL policies to Unocal or its predecessor operators during the pre-1986 window may retain enforceable obligations to recover the costs of that completed cleanup.
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.


