This property has a documented history as a dry cleaning facility going back to 1964. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.
This Mercer Island property housed a dry cleaning operation for approximately 40 years, first as Silers Cleaners and later under OSW LLC, with operations running from approximately 1964 through 2004. Contamination from dry cleaning solvents — including tetrachloroethylene (PCE) and related halogenated solvents — has been confirmed in both soil and groundwater, discovered during due diligence testing of the former dry cleaner. The site has been added to Ecology's cleanup list under the Voluntary Cleanup Program; no remediation has yet commenced, and the site remains in the awaiting-cleanup stage. 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.
Dry cleaning operations at this property began in 1964 and continued for more than two decades before 1986, the year CGL policies began incorporating effective pollution exclusions. PCE contamination of the type confirmed here — slow solvent releases accumulating in soil and groundwater over decades — is precisely the exposure profile that occurrence-based policies of that era were written to cover. The investigation, remedial design, and cleanup costs the property owner now faces could plausibly be funded by historical carriers whose policies were in force during the years Silers Cleaners was actively operating.
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.


