Industrial & Manufacturing cleanup site — Restorical Research
Snopac Property
5055 E Marginal Way, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility going back to 1900. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property at 5055 E Marginal Way has been in continuous industrial use since the early 1900s, with documented activities including shipbuilding, coal burning, corrugated paperboard manufacturing, and marine equipment maintenance and repair. The primary source of contamination is spent sandblast grit (SBG) — smelter slag-derived grit and waste paints deposited in fill material beginning in the 1970s — which has affected upland soil, groundwater, and in-water sediments. Three diesel underground storage tanks installed in 1959 were excavated and removed in 1989. A 2019 Agreed Order governs the current multi-year cleanup, which includes an Interim Action to install a shoring wall and remove SBG-containing fill, with subsequent remedial phases to address remaining contaminated fill. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
Address5055 E Marginal Way, Seattle, King County
Historical UseIndustrial & Manufacturing
Est. Operating Since1900
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsSpent sandblast grit (SBG) containing smelter slag-derived grit and waste paints, and petroleum hydrocarbons from diesel USTs, detected in soil, groundwater, and in-water sediments
Media ImpactedSoil, Groundwater, Sediment
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #12463

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 Snopac originates from two distinct pre-1986 exposure events: diesel USTs installed in 1959 and SBG dumping that began in the 1970s — both occurring decades before 1986, when occurrence-based CGL policies were in force at this facility. Historical carriers who issued policies during those operational windows may be obligated both to reimburse costs already incurred — including the 1989 UST excavation and remediation expenditures undertaken under the 2019 Agreed Order — and to fund the substantial multi-phase cleanup work still to come at this site.

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.