Gas Station cleanup site — Restorical Research
Wilderness Chevron
23701 Maple Valley Hwy, Maple Valley, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1969. Historical insurance policies issued during operations at this property and through 1986 could fund a cleanup — and recover costs already spent.

This property has operated as a gasoline service station since 1969, when it was developed from vacant land into a Chevron fueling facility with underground storage tanks, fuel dispenser islands, and a station building. Groundwater contamination was identified, and cleanup under the Voluntary Cleanup Program has been ongoing since at least 1995, including multi-year groundwater monitoring, installation of monitoring wells, subsurface investigation through soil borings, and on-site treatment of extracted groundwater using granular activated carbon. The facility remains in active commercial use with three gasoline USTs and four dispenser islands. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Gas Station
Address23701 Maple Valley Hwy, Maple Valley, King County
Historical UseGas Station
Est. Operating Since1969
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (TPH-G, BTEX) and lead detected in groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #5557

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.

Petroleum contamination at this site — including gasoline-range hydrocarbons, BTEX compounds, and lead indicative of historical leaded gasoline operations — originated from fueling infrastructure installed and operated continuously since 1969, nearly two decades before the 1986 cutoff for occurrence-based CGL coverage. The documented remediation expenditures already span more than fifteen years of groundwater monitoring, well installation, subsurface investigation, and active carbon treatment, with cleanup still underway. Historical carriers who wrote CGL policies covering this station during its pre-1986 operational window may be obligated both to reimburse past cleanup costs and to fund the remediation work that remains.

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.