This property has a documented history as a gasoline service station going back to 1941. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup.
The property at 303 S Michigan St has served over the decades as a residence, a retail building, and a bank, but Phase II environmental investigation has identified groundwater contamination beneath the site attributable to up-gradient, off-site gasoline filling stations that operated from approximately 1941 to 1960. The detected contamination consists of weathered petroleum hydrocarbons consistent with a historical gasoline release from those former off-site operations. No active remediation has commenced at the subject parcel; a vapor mitigation system has been identified as a potential future measure, with an estimated installation cost of approximately $40,000. 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.
The petroleum contamination now affecting groundwater beneath this property originated from gasoline station operations conducted from the early 1940s through approximately 1960 — squarely within the era when occurrence-based Commercial General Liability policies were the industry standard and contained no effective pollution exclusion in Washington. The operators of those up-gradient filling stations, and the insurers who issued them pre-1986 CGL coverage, may remain liable to fund the remediation that has yet to begin at this site. For a property still awaiting cleanup, tracing that obligation back to historical carriers could provide the mechanism to pay for vapor mitigation, further investigation, and any additional remediation the site ultimately requires.
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.


