Gas Station cleanup site — Restorical Research
US Navy Subase OU8
Silverdale, Kitsap County
Restorical Research
Preliminary Site-Specific Analysis

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 fund a cleanup — and recover costs already spent.

Operable Unit 8 (OU 8) at the US Navy Submarine Base in Silverdale encompasses a gas station area within the Public Works Industrial Area that released petroleum hydrocarbons, including free product gasoline, into soil and groundwater. Remediation efforts have included operation and subsequent shutdown of both a groundwater containment system and a Soil Vapor Extraction system, free product recovery removing approximately 3.5 gallons of gasoline, and ORC socks installation in 2009. Bioaugmentation pilot studies were conducted in 2010 (five injection wells) and 2012–2013 (three injection wells), and a Benzene Pilot Study assessing soil vapor extraction and sparging ran from 2015 to 2016. Monitored Natural Attenuation has been in place since 2000 and cleanup work remains ongoing. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
AddressSilverdale, Kitsap County
Historical UseGas Station
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons and benzene (including free product gasoline) detected in soil, groundwater, and soil vapor
Media ImpactedGroundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #149

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 petroleum contamination at OU 8 originates from gas station operations within the Naval Base's Public Works Industrial Area that were active well before 1986 — the era when occurrence-based Commercial General Liability policies had no effective pollution exclusion in Washington. Contamination plumes were documented at their greatest extents in 1996, and free product gasoline continues to be recovered from the gas station area, reflecting a slow, ongoing release tied directly to those pre-1986 operations. The documented remediation expenditures — containment systems, vapor extraction, multiple bioaugmentation campaigns, pilot studies spanning years, and sustained monitored natural attenuation — represent costs that historical CGL carriers whose policies covered the operational window 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.