This property has a documented history as a public works and maintenance facility going back to 1972. Historical insurance policies issued during those prior operations and through 1986 could recover the cleanup costs already paid.
This property was owned and operated by the Sunnyside Valley Irrigation District, which maintained a 500-gallon gasoline underground storage tank likely used to fuel public works vehicles and equipment. The UST was removed in 1997 in poor condition — corroded through with holes and rust — and approximately 100 cubic yards of petroleum-contaminated soil were excavated and disposed of off-site. A subsequent 2024 site assessment generated additional investigation-derived waste removed in January 2025, and the site has since received a No Further Action determination. The City of Sunnyside acquired the property in 2006 as part of a wastewater treatment plant expansion. 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 deteriorated condition of the gasoline UST at removal — holes and extensive rust — points to an installation date in the early 1970s, placing the tank's entire operational life squarely within the era of occurrence-based Commercial General Liability coverage that carried no effective pollution exclusion. Remediation costs spanning nearly three decades — tank removal, soil excavation, and a follow-up investigation more than 25 years later — were incurred to address a historical petroleum release tied to those pre-1986 public works operations. Historical carriers who provided CGL coverage to the irrigation district during that window may still be obligated to reimburse those documented 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.
