Gas Station cleanup site — Restorical Research
WA DOT Corwin Pl S
Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1950. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

This property operated as a retail gasoline station from the 1950s through 1985, with underground storage tanks — including leaded-gasoline tanks associated with Exxon — that were removed in the 1960s. Gasoline-range contaminants, including benzene, toluene, ethylbenzene, and xylenes, were discovered in soil and groundwater in 1987 during I-90 construction activities and attributed to leakage from those historical underground tanks and associated piping. The site is enrolled in the Standard Cleanup program and remains designated Awaiting Cleanup, with no active remediation yet commenced. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
AddressSeattle, King County
Historical UseGas Station
Est. Operating Since1950
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsBenzene, toluene, ethylbenzene, and xylenes (BTEX) from historical underground storage tanks detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #10221

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.

Gasoline station operations at this property — including the dispensing and storage of leaded gasoline — began more than three decades before 1986, when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion. The BTEX contamination identified in 1987 traces directly to releases from tanks in operation during that pre-1986 window, placing the occurrence trigger squarely in the era when those policies were in force. The investigation and remediation costs the property now faces are precisely the type of expenditure that historical carriers whose policies covered operations here may be obligated to fund.

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.