This property has a documented history as a farm and agricultural operation going back to 1968. Historical insurance policies issued during those prior operations and through 1986 could recover the cleanup costs already paid.
This Grant County property served as the Wolfkill Feed & Fertilizer facility in Mattawa, with historical operations involving liquid and dry fertilizer storage and distribution, as well as pesticides and herbicides maintained onsite. Cleanup under the Voluntary Cleanup Program included soil excavation in two areas — approximately 250 cubic feet in area B-2 and approximately 31,500 cubic feet in area B-5 — followed by grading and gravel cover as a containment measure. Quarterly groundwater monitoring ran from 2000 to 2002, and a Restrictive Covenant recorded in 2003 restricts domestic groundwater use and preserves the integrity of the remedial action; periodic reviews in 2009, 2015, and 2021 confirm the institutional controls remain effective. 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 contamination at this site — nitrates, pesticides, and herbicides — traces to fertilizer storage and distribution operations established by at least 1968, more than a decade before 1986 when occurrence-based CGL policies were the industry standard and carried no effective pollution exclusion. The 1997 site evaluations attributed contamination to the facility's usual operations, confirming that releases arose from long-running pre-1986 activities rather than any discrete incident. Historical carriers who issued CGL policies to Wolfkill Feed & Fertilizer during that operational window may still be obligated to recover the documented excavation, monitoring, and institutional-control costs.
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.


