Heating Oil Tank cleanup site — Restorical Research
Koz on Republican
312 W Republican St, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a property with a heating oil tank going back to 1928. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property was constructed in 1928 and has included an oil-burning furnace — and associated underground storage tanks — since at least 1965, when the furnace was listed on tax records. A 500-gallon and a 1,200-gallon heating oil UST were identified as the source of petroleum hydrocarbon contamination at the site. Remediation has proceeded from 2019 through 2024, including UST removals, removal of 63.66 tons of impacted soil in 2021, and a larger excavation in early 2024 that extracted 1,567 tons of additional impacted soil with shoring installed, along with disposal of 1,500 gallons of pumped stormwater. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Heating Oil Tank
Address312 W Republican St, Seattle, King County
Historical UseHeating Oil Tank
Est. Operating Since1928
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (diesel/heating oil TPH) from leaking USTs detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #17153

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 infrastructure at this property — furnaces and USTs documented in service by 1965 — was in active use for at least two decades before 1986, when occurrence-based CGL policies ceased to reliably cover pollution claims. The contamination here is the product of prolonged heating oil releases from those pre-1986 installations, not a discrete incident, and the remediation costs already incurred — removal of over 1,630 tons of impacted soil across two excavation phases, UST extraction, and multi-year groundwater management — are precisely the category of expenditure that historical carriers may be obligated to fund.

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.

Ready to learn more?

Contact Us

This analysis is preliminary and based on publicly available records. Restorical Research is not a law firm and does not provide legal advice.