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 housed underground storage tanks containing gasoline, diesel, and heavy oil-range petroleum products at 1550 4th Ave S in Seattle. Cleanup under the Voluntary Cleanup Program spanned more than thirteen years, from 1993 through at least 2006, and included multiple phases of UST removal and soil excavation in 1993 and 2004, Oxygen Releasing Compound applications to treat contaminated groundwater from 2001 to 2005, and installation and sampling of groundwater monitoring wells. The site has received a No Further Action determination from Ecology. 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 removed from this property in 1993 and 2004 were consistent with installations dating to the late 1960s and 1970s — well within the era when occurrence-based Commercial General Liability policies carried no effective pollution exclusion in Washington. Over thirteen years of documented remediation costs — repeated tank removals, soil excavation, groundwater treatment, and long-term monitoring — were incurred to address petroleum and BTEX releases tied directly to those pre-1986 tank operations. Historical carriers who wrote CGL policies covering this property during that window may still be obligated to reimburse those cleanup expenditures.
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.


