Gas Station cleanup site — Restorical Research
University St & 6th Ave Plume
1320 6th Ave, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1966. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

An auto station has been documented at this Seattle address since at least 1966, with two 2,000-gallon gasoline underground storage tanks installed around 1970 and a fuel release reported around 1972; those tanks were formally abandoned in 1985. Investigation and early remediation have included recovery of 129 gallons of light non-aqueous phase liquid (LNAPL) through skimmer pumps, vacuum extraction, and submersible pumps, along with in-situ groundwater treatment using oxygen release compounds and sorbent socks, supported by multi-year monitoring from 2011 through at least 2024. Lead — a marker of leaded gasoline dispensed more than forty years ago — remains detectable in current groundwater samples, and no active cleanup work has 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
Address1320 6th Ave, Seattle, King County
Historical UseGas Station
Est. Operating Since1966
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (TPH-G, BTEX) and lead from leaking USTs detected in groundwater
Media ImpactedSoil, Groundwater, Air
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #17084

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 contamination here traces to gasoline operations running from at least 1966, with a documented release reported around 1972 from tanks that remained in service through 1985 — a span falling entirely within the era of occurrence-based Commercial General Liability policies. Lead still detected in 2024 groundwater samples is a direct chemical signature of fuel dispensed at this location before leaded gasoline was phased out, confirming a contamination origin that is demonstrably pre-1986 rather than attributable to any recent incident. The cleanup costs now ahead — continued LNAPL recovery, in-situ treatment, and long-term monitoring of a multi-parcel plume — represent expenditures that historical carriers whose policies covered the 1972 release and surrounding operational years 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.