Industrial & Manufacturing cleanup site — Restorical Research
West Coast Self Storage
3310 3200 Harbor Ave SW & South Parcel, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a industrial and manufacturing facility going back to 1914. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

The middle parcel of this Harbor Avenue property housed continuous industrial operations — metal fabricating, airplane parts manufacturing, and machining — from 1960 through early 1999, within a building constructed in 1914 that also hosted dry cleaning activity dating to 1929. Trichloroethylene (TCE) in groundwater at the site exceeds its cleanup level by more than 4,000 times, the highest exceedance factor on the property, reflecting the scale and duration of those machining and metal-fabricating processes. In 2019, remediation included excavation and off-site disposal of 1,252 tons of contaminated soil from multiple hot spots at depths ranging from 5 to 16 feet below grade, followed by installation of a cap, a vapor barrier, and a passive sub-slab depressurization system. Cleanup remains active, with groundwater monitoring across seven wells on a 15-month schedule and five-year periodic reviews. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Industrial & Manufacturing
Address3310 3200 Harbor Ave SW & South Parcel, Seattle, King County
Historical UseIndustrial & Manufacturing
Est. Operating Since1914
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsTrichloroethylene (TCE), Stoddard solvent, and lead detected in soil, groundwater, and soil vapor
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #12494

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 this property — led by TCE exceedances of over 4,000 times the cleanup level — traces directly to machining and metal-fabricating operations that ran from 1960 into the late 1990s, with the site's industrial and dry cleaning history extending to 1914, decades before 1986, when occurrence-based CGL policies still lacked effective pollution exclusions. Stoddard solvent and lead contamination tied to those same pre-1986 operational periods compound the liability picture. The documented remediation expenditures — large-scale soil excavation, engineered capping, vapor controls, and long-term groundwater monitoring — represent costs that historical carriers covering this site's operations prior to 1986 may be obligated both to recover and to fund as work continues.

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.