Bulk Plant cleanup site — Restorical Research
Olympic Pipe Line Maplewood
3524 SE 5th St, Renton, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a bulk fuel distribution terminal predating 1986. Historical insurance policies issued during those prior operations and through 1986 could recover the cleanup costs already paid.

An Olympic Pipeline Company (OPLC) petroleum pipeline bisects the Maplewood neighborhood in Renton, and a leaking block valve fitting on that pipeline released an estimated 80,000 gallons of mixed gasoline, diesel, and jet fuel into the surrounding soil and groundwater — a release that began in late summer or early fall of 1985 and was not repaired until January 1986. Cleanup under the Voluntary Cleanup Program ran from 1986 through 2014 and encompassed groundwater recovery, vapor recovery trenches, air sparging, soil vapor extraction, multi-phase extraction, and an ozone sparging pilot that collectively removed thousands of gallons of hydrocarbons from the subsurface. The project concluded with confirmatory soil borings and monitored natural attenuation, and the site has since received No Further Action status. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Bulk Plant
Address3524 SE 5th St, Renton, King County
Historical UseBulk Plant
Est. Operating SincePre-1986
StatusNo Further Action
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (gasoline, diesel, and jet fuel) detected in soil and groundwater from a leaking pipeline block valve
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #1025

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 80,000-gallon petroleum release at this property originated from a pipeline leak that began in 1985 — squarely within the era when occurrence-based Commercial General Liability policies were routinely written without an effective pollution exclusion. Because the contaminating event predates 1986, any CGL policy carried by OPLC or related parties during that period attached on an occurrence basis, making the policy trigger independent of when remediation costs were actually incurred. Twenty-eight years of documented expenditures — from initial groundwater recovery through vapor extraction and long-term monitoring — represent cleanup costs that historical carriers whose policies were in force during the 1985 release may still be obligated to address.

Restorical's role is to locate viable historical policies, determine whether a successful cost recovery claim is possible, and assist our clients and their legal counsel to obtain insurance coverage for costs already incurred. Restorical's forensic accounting team works to re-establish and document past cleanup expenditures, ensuring the strongest possible basis for recovery.

Recovering Costs from an Older Cleanup

If this site reached No Further Action years ago, the original cleanup expenditures may be difficult to reconstruct. Restorical's forensic accounting team specializes in re-establishing and documenting past cleanup costs — even decades later — to build the strongest possible basis for an insurance recovery claim.

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 — Cost Recovery
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim and negotiate recovery of costs already incurred. Restorical's forensic accounting team re-establishes and documents past cleanup expenditures, managing the claim process to ensure the insurance companies fulfill their obligation 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.