Gas Station cleanup site — Restorical Research
Arco 5207
401 Park Ave N, Renton, 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 operations at this property and through 1986 could fund a cleanup — and recover costs already spent.

This property has operated as an ARCO gasoline service station since 1964, with underground storage tanks dispensing regular, unleaded, and supreme unleaded gasoline. Petroleum impacts were identified in 1989, prompting removal of three 15,000-gallon and one 500-gallon USTs in 1990, excavation and vapor extraction treatment of 1,650 cubic yards of impacted soil, and operation of an Air Sparging/Soil Vapor Extraction system from 1993 to 2005 that removed 205 pounds of VOCs and recovered 5,495 gallons of contaminated liquid. In-situ sulfate solution injection was conducted between 2011 and 2013, and groundwater monitoring has been ongoing since 1992. The station remains in active operation with four replacement 10,000-gallon USTs installed after the original tank removal. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address401 Park Ave N, Renton, King County
Historical UseGas Station
Est. Operating Since1964
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (VOCs) and lead from leaking USTs detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #8164

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.

Contamination at this site — petroleum hydrocarbons and lead consistent with decades of leaded gasoline storage — originated from fueling operations that began twenty-two years before 1986, when occurrence-based CGL policies were standard and carried no effective pollution exclusion in Washington. More than three decades of documented remediation expenditures — tank removals, large-scale soil excavation, twelve years of vapor extraction, sulfate injection, and continuous groundwater monitoring — were incurred to address releases tied directly to those pre-1986 operations. Historical carriers who issued CGL policies during that window may be obligated both to recover past cleanup costs and to fund the remediation work that continues today.

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.