Gas Station cleanup site — Restorical Research
7-Eleven 23176
Mukilteo, Snohomish County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1985. Historical insurance policies issued during operations at this property and through 1986 could fund a cleanup — and recover costs already spent.

This property operates as a 7-Eleven convenience store with retail gasoline sales, served by underground storage tanks and product dispensers for unleaded gasoline. The presence of lead contamination in groundwater and single-wall USTs removed in 2010 indicate gasoline operations dating to at least 1985. Cleanup activities have included UST removal, soil and groundwater excavation, and operation of a Soil Vapor Extraction system, with multi-year groundwater monitoring ongoing since 1996. The site has entered the Voluntary Cleanup Program, with planning underway for in-situ treatment using BOS-200 technology. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
AddressMukilteo, Snohomish County
Historical UseGas Station
Est. Operating Since1985
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons and lead from leaking USTs detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #11010

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.

Petroleum contamination at this site traces to underground storage tanks installed and operated before 1986 — evidenced by lead in groundwater consistent with leaded-gasoline use and single-wall tank construction predating modern double-wall standards. Occurrence-based CGL policies in effect during that pre-1986 operational window carried no effective pollution exclusion under Washington law. Three decades of documented remediation expenditures — tank removals, soil excavation, vapor extraction, and ongoing groundwater monitoring — along with the planned in-situ treatment still ahead, represent costs that historical carriers who wrote those policies 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.