Industrial & Manufacturing cleanup site — Restorical Research
Welco Lumber
6615 172nd St NE, Arlington, Snohomish 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 — and recover costs already spent.

This property operated as the Welco Wood Products Facility, a lumber and wood products operation whose use of pentachlorophenol (PCP) as a wood preservative resulted in PCP and tetrachloroethene (PCE) contamination in the groundwater near the former Resaw Building. Remediation has been underway since 2004, encompassing the excavation of 1,740 tons of impacted soil and three rounds of in-situ chemical oxidation (ISCO) groundwater treatment involving tens of thousands of gallons of reagents conducted through 2012. The site entered the Voluntary Cleanup Program in 2011, has incurred documented remediation costs exceeding $500,000, and cleanup remains ongoing with institutional controls proposed for site closure. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
Address6615 172nd St NE, Arlington, Snohomish County
Historical UseIndustrial & Manufacturing
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPentachlorophenol (PCP) and tetrachloroethene (PCE) detected in groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #11617

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.

Pentachlorophenol was the industry-standard wood preservative at facilities like this one for decades before its use was restricted and phased out in the late 1980s, placing the contamination origin firmly in the pre-1986 era when occurrence-based Commercial General Liability policies carried no effective pollution exclusion. The slow, subsurface migration of PCP and PCE through soil and into groundwater is precisely the type of gradual release those policies were written to cover, and they remain enforceable today against the operators who held them during the wood-treatment years. With remediation costs already exceeding $500,000 and cleanup still active, historical carriers that issued CGL policies during those operations may bear obligation both to recover past expenditures and to fund the remediation work still ahead.

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.