Gas Station cleanup site — Restorical Research
Sims Modern Sewer
Mukilteo, Snohomish 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.

This property is the documented source of a historical gasoline release linked to underground storage tank operations. Laboratory analyses have confirmed elevated levels of gasoline-range total petroleum hydrocarbons, benzene, xylenes, and dissolved lead in groundwater — a contaminant profile consistent with leaded gasoline. The site is enrolled in the Voluntary Cleanup Program, where remediation has included UST excavation and the decommissioning of ten temporary and historical monitoring wells to prevent further contaminant migration. Cleanup work is ongoing. 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 SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsGasoline-range total petroleum hydrocarbons (TPH-G), benzene, xylenes, and dissolved lead detected in groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #6676

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 presence of dissolved lead alongside gasoline-range hydrocarbons and BTEX compounds points to a release of leaded gasoline, which was largely phased out by 1986 — placing the contaminating operations squarely within the era of occurrence-based Commercial General Liability coverage that carried no effective pollution exclusion in Washington. The documented remediation expenditures to date — tank excavation, well decommissioning, long-term VCP enrollment — and the costs still ahead represent obligations that historical carriers who wrote CGL policies during the period of active gasoline operations may be required both to reimburse 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.