This property has a documented history as a industrial and manufacturing facility predating 1986. Historical insurance policies issued during those prior operations and through 1986 could recover the cleanup costs already paid.
Mutual Materials Co. operated as an industrial materials business in Auburn, with an underground storage tank used to fuel on-site equipment or fleet vehicles. A diesel release from that tank was reported to regulators on June 18, 1992; remediation addressing diesel-affected soil and groundwater was subsequently conducted independently and achieved Method A Cleanup levels. The process from release notification to No Further Action determination spanned approximately 19 years. 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 tank responsible for the diesel contamination at this site was installed and operational prior to 1986 — the period when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion in Washington. Those pre-1986 policies attach to the contamination event regardless of when the release was reported or remediated. Nearly two decades of documented cleanup work to reach No Further Action represents a remediation cost trail that historical carriers who issued CGL policies during the tank's operational years may still be obligated to recover.
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.


