Bulk Plant cleanup site — Restorical Research
Unocal Bulk Plant 0766
511 Lincoln Ave, Sunnyside, Yakima County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a bulk fuel distribution terminal going back to 1940. Historical insurance policies issued during those prior operations and through 1986 could recover the cleanup costs already paid.

This property operated as a petroleum bulk fuel distribution terminal from at least the 1940s, housing aboveground storage tanks for leaded gasoline, unleaded gasoline, diesel #1, and diesel #2, along with a truck loading rack and underground product lines connecting to a drum-filling station. Cleanup under the Voluntary Cleanup Program began in 1989 with removal of a heating oil UST and 90 cubic yards of contaminated soil, followed by over two decades of light non-aqueous phase liquid (LNAPL) recovery from groundwater. A major excavation in 2018 removed 901 tons of contaminated soil and 8,138 gallons of dewatered groundwater, with Oxygen Release Compound applied and PetroFix™ bioremediation solution injected in 2020. Groundwater monitoring concluded in May 2021, and the site has received a No Further Action determination. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Bulk Plant
Address511 Lincoln Ave, Sunnyside, Yakima County
Historical UseBulk Plant
Est. Operating Since1940
StatusNo Further Action
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (leaded gasoline, unleaded gasoline, diesel #1 and #2) detected as LNAPL in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #1907

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 property originated from bulk fuel operations — including the storage and distribution of leaded gasoline — that were underway decades before 1986, when occurrence-based Commercial General Liability policies had no effective pollution exclusion. The documented remediation record spans more than thirty years: a 1989 UST removal, sustained LNAPL groundwater recovery from 1990 through 2011, a major 2018 soil excavation, and injected bioremediation followed by multi-year monitoring. Historical carriers who issued CGL policies during those pre-1986 operational years may still be obligated to recover the cleanup expenditures tied to contamination that originated under their coverage.

Restorical's role is to locate viable historical policies, determine whether a successful cost recovery claim is possible, and assist our clients and their legal counsel to obtain insurance coverage for costs already incurred. Restorical's forensic accounting team works to re-establish and document past cleanup expenditures, ensuring the strongest possible basis for recovery.

Recovering Costs from an Older Cleanup

If this site reached No Further Action years ago, the original cleanup expenditures may be difficult to reconstruct. Restorical's forensic accounting team specializes in re-establishing and documenting past cleanup costs — even decades later — to build the strongest possible basis for an insurance recovery claim.

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 — Cost Recovery
When Task 1 confirms viable coverage, Restorical works with your legal counsel to tender the claim and negotiate recovery of costs already incurred. Restorical's forensic accounting team re-establishes and documents past cleanup expenditures, managing the claim process to ensure the insurance companies fulfill their obligation 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.