This property has a documented history as a industrial and manufacturing facility going back to 1970. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.
This Tukwila industrial property was occupied by Tri Way Industries from 1970 through 1984–1985, during which time they conducted metal fabrication operations using trichloroethylene (TCE) and perchloroethylene (PCE) as vapor degreasers, releasing halogenated volatile organic compounds (HVOCs) into soil and groundwater. A multi-year Voluntary Cleanup Program ran at least from 2010 to 2019, encompassing a Remedial Investigation, Feasibility Study, and management of investigation-derived waste; adjacent property contamination from Tri Way's operations has also required past UST removal and groundwater cleanup. Cleanup work at the site is ongoing. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.
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.
Tri Way Industries' solvent degreasing operations — the documented source of TCE and PCE contamination at 600 Andover Park East — ran entirely between 1970 and 1985, a period when occurrence-based Commercial General Liability policies were the industry standard and carried no effective pollution exclusion in Washington. Carriers who issued CGL coverage to Tri Way or the property operators during that window may remain obligated both to recover the remediation costs already incurred — investigation, feasibility work, waste management — and to fund the cleanup expenditures 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
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Contact UsThis analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.


