Industrial & Manufacturing cleanup site — Restorical Research
Interstate Coatings
Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.

Interstate Coatings operated as a commercial painting company specializing in large structures such as bridges and electrical towers, using its facility for equipment repair, storage, and business operations. Contamination from operational spills of oil, solvents, and thinners was first confirmed in spring 1990, and the site was added to the state's Contaminated Sites List by March 1991. A 1998 site assessment documented old sandblast grit among the contaminated areas alongside TPH-Diesel, lead, chromium, and arsenic. Cleanup since 1990 has been limited to general property work and paving a large portion of the site, with substantive remediation still pending under Standard Cleanup. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
AddressSeattle, King County
Historical UseIndustrial & Manufacturing
Est. Operating SincePre-1986
StatusAwaiting Cleanup
Contamination & Investigation
Site Assessment Summary
ContaminantsTPH-Diesel, lead, chromium, and arsenic detected in soil from operational spills and sandblasting residue
Media ImpactedSoil, Groundwater, Surface Water, Air
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #2055

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 profile here — lead, chromium, and arsenic alongside diesel hydrocarbons and solvents — reflects the kind of contamination that accumulates over years of industrial painting and sandblasting operations, not a single reportable spill. The 1998 assessment's characterization of the sandblast grit as 'old' is the clearest marker in the record that the contamination-generating activity predates the 1990 report by a meaningful margin, placing the operative releases within the pre-1986 window when occurrence-based CGL policies were issued to industrial operators like Interstate Coatings without effective pollution exclusions. The full remediation costs the site still faces — design, excavation, and long-term monitoring for a multi-contaminant industrial site — are precisely the category of future expenditure those historical policies 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.