Gas Station cleanup site — Restorical Research
Shell 120531
11700 NE 160th, Bothell, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1964. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property has been in use since at least 1964, when a heating oil underground storage tank was installed on site. A Texaco-branded service station was developed here in 1972, equipped with three 8,000-gallon gasoline USTs, a 550-gallon waste oil UST, dispenser islands, and an automotive repair shop. Petroleum contamination attributed to the former gasoline USTs and dispenser islands — released sometime prior to 1991 — prompted cleanup under the Voluntary Cleanup Program beginning in May 1992. Remediation has included excavation of approximately 1,740 cubic yards of petroleum-impacted soil during 1991 UST upgrades, installation of vapor extraction piping, and dual-phase extraction feasibility testing in 1995, with soil and groundwater cleanup efforts still ongoing. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address11700 NE 160th, Bothell, King County
Historical UseGas Station
Est. Operating Since1964
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons from leaking USTs detected in soil and groundwater, with vapor extraction conducted
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #6412

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 at this site originated from underground storage tanks and fuel dispensing equipment installed in 1972 and operated continuously through at least 1991 — well within the era when occurrence-based Commercial General Liability policies carried no effective pollution exclusion in Washington. Over three decades of documented remediation expenditures, from large-scale soil excavation to vapor extraction infrastructure and ongoing groundwater treatment, trace directly to releases from those pre-1986 operations. Historical carriers who wrote CGL policies covering this station during the 1972–1986 window may be obligated both to recover past cleanup costs and to fund the remediation work that remains ahead.

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.