Industrial & Manufacturing cleanup site — Restorical Research
Wesmar Company Inc
1451 NW 46th, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility going back to 1905. 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 continuous industrial use since its construction in 1905 and 1906, beginning as a wood pipe treatment facility where creosote was applied to wooden pipes — operations documented under Continental Pipe Manufacturing Co. from at least 1917 through 1947, with subsequent industrial uses including plastic products manufacturing, a cannery, fiberglass product manufacturing, and Wesmar operations beginning in 1979. Contamination from those pipe-treatment years left PAHs and arsenic across three areas of the site. The approved remedy for Area A calls for excavating 55,000 to 65,000 cubic yards of contaminated soil, installing an impermeable shoring wall, and managing construction dewatering; Areas B and C will be capped with clean soil or asphalt, with institutional controls applied site-wide. The site has reached cleanup completion and is now in active long-term groundwater monitoring and treatment. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
Address1451 NW 46th, Seattle, King County
Historical UseIndustrial & Manufacturing
Est. Operating Since1905
StatusCleanup Complete — Active O&M/Monitoring
Contamination & Investigation
Site Assessment Summary
ContaminantsPolycyclic aromatic hydrocarbons (PAHs), arsenic, and creosote in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #1325

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 PAH and arsenic contamination here is directly attributable to creosote applied during wood pipe treatment by Continental Pipe Manufacturing Co. and its predecessors — operators who carried CGL policies across decades of activity stretching from 1917 into the mid-twentieth century, long before 1986. Those carriers insured a specific industrial process — pipe treatment with known coal-tar derivatives — under policy forms that imposed no effective pollution exclusion on that process. Excavating tens of thousands of cubic yards of creosote-impacted soil, constructing shoring infrastructure, capping multiple areas, and sustaining long-term groundwater treatment are all costs that flow from the pipe-treatment operations those historical policies covered, and the carriers who issued them may remain obligated to contribute.

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.