PFAS cleanup site — Restorical Research
Renton Municipal Airport Fire Training Area
Renton, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a facility using PFAS-containing firefighting foam going back to 1958. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

The former South Fire Training Area at Renton Municipal Airport operated from the late 1950s until approximately 1970, with aerial photographs confirming its presence and use as early as 1964. Site characterization work conducted from 1992 to 1993 documented soil and groundwater impacts, and interim remedial measures recovered 1.43 gallons of Light Nonaqueous Phase Liquid (LNAPL) between August and October of 1993. The corrective action project remains ongoing, with further site characterization required. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former PFAS
AddressRenton, King County
Historical UsePFAS
Est. Operating Since1958
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsLight Nonaqueous Phase Liquid (LNAPL) detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #2546

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.

Fire training operations at this site began in the late 1950s and ran for more than a decade before closing around 1970 — placing the contamination-generating activities well within the era of occurrence-based Commercial General Liability policies that carried no effective pollution exclusion. The documented LNAPL in soil and groundwater is a direct legacy of those pre-1986 operations, and the costs of ongoing corrective action — characterization, recovery, and monitoring — represent expenditures that historical carriers may be obligated both to recover and to fund going forward.

Restorical's role is to locate viable historical policies, determine whether a successful coverage claim is possible, and assist our clients and their legal counsel to obtain insurance coverage. Restorical then manages the claim, including accounting, to ensure the cleanup is funded in a timely manner.

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

Task 1 — Research and Analysis
Restorical searches for viable historical insurance policies, researches the site history, analyzes the contamination impacts, and underwrites potential coverage — including a proprietary trigger analysis. At the end of Task 1, we provide a clear yes or no on whether a successful cost recovery is possible, along with a strategy and recommendation specific to your situation, even if you are not the policyholder.
Task 2 — Coverage and Funding
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim, negotiate and secure insurance coverage. Restorical will manage the ongoing claim process, including accounting to ensure the insurance companies are funding your remediation in a timely manner.

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This analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.