Gas Station cleanup site — Restorical Research
Stillwater Holdings Chevron
7 E Rose Street, WALLA WALLA, Walla Walla County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1983. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This property has operated as a gasoline station since at least the early 1980s, previously doing business as Singer's Chevron. Underground storage tanks on site included a fuel UST installed around 1983 and a waste oil UST decommissioned in 2005, with a Phase II site investigation completed in 2010 and an Environmental Covenant recorded in May 2013. In September 2023, the approximately 40-year-old fuel UST released nearly 2,500 gallons of gasoline, contaminating groundwater beneath the property and causing petroleum vapor intrusion that forced emergency evacuation of the nearby Marcus Whitman Hotel. Cleanup under the Standard Cleanup program is underway, with sump water treatment and vapor mitigation systems operating at both the Marcus Whitman Hotel and the adjacent 106 Building. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address7 E Rose Street, WALLA WALLA, Walla Walla County
Historical UseGas Station
Est. Operating Since1983
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (gasoline) detected in groundwater and air (vapor intrusion)
Media ImpactedSoil, Groundwater, Air
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #16913

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 fuel storage infrastructure at this station dates to approximately 1983 — squarely within the era when occurrence-based Commercial General Liability policies covered pollution liabilities without effective exclusion. The site's environmental history stretches back at least to 2005, when waste oil UST decommissioning was first documented, and the 2023 release has added substantial remediation obligations including emergency response, groundwater treatment, and vapor mitigation across multiple neighboring properties. Historical CGL carriers who insured the station's operations during the pre-1986 window may bear responsibility for both accumulated and ongoing cleanup costs at this site.

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.

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