This property has a documented history as a property with a heating oil tank going back to 1952. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.
The Manweiler Apartments were constructed in 1952, and an 850-gallon underground heating oil tank was installed at that time to supply the building's furnace; the tank's use was discontinued in the late 1960s or early 1970s. The tank was discovered during demolition of the apartment complex, at which point corrosion-induced leaks had contaminated the surrounding soil with heating oil. Cleanup activities included excavation and removal of the tank along with 45.7 tons of petroleum-contaminated soil, and groundwater sampling was conducted to assess contamination extent; further groundwater investigation and monitoring well installation have been recommended, and the site has been added to the state's contaminated sites database. 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 heating oil tank at this property was installed in 1952 and operated for roughly two decades — a timeline that places the contamination-causing operations entirely within the era when occurrence-based CGL policies were the industry standard and carried no effective pollution exclusion. The gradual corrosion and leakage that released petroleum into the soil and groundwater here is precisely the type of slow, ongoing release those pre-1986 policies were written to address. Documented remediation costs — tank removal, soil excavation, and an ongoing groundwater investigation — represent expenditures that historical carriers whose policies covered the property during its operational period may be obligated both to recover and to fund going forward.
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.


