Public Works cleanup site — Restorical Research
King County Metro Central Base
640 S Massachusetts St, Seattle, King County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a public works and maintenance facility going back to 1973. Historical insurance policies issued during operations at this property and through 1986 could fund a cleanup — and recover costs already spent.

This property has served as a bus garage, storage, and maintenance facility for King County Metro — formerly the Municipality of Metropolitan Seattle — since Metro began transit operations in 1973. The facility includes registered underground storage tanks and a dedicated fuel building supporting fleet fueling and maintenance. Groundwater sampling has confirmed petroleum contamination well above cleanup levels, with bore pit water showing diesel-range total petroleum hydrocarbons at 190,000 µg/L — 380 times the MTCA Method A cleanup level — and gasoline-range and other petroleum compounds also confirmed above standards. Cleanup is underway under the Standard Cleanup program. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Public Works
Address640 S Massachusetts St, Seattle, King County
Historical UsePublic Works
Est. Operating Since1973
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons (diesel-range, gasoline-range, and other petroleum) confirmed above cleanup levels in groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Standard Cleanup
Ecology Site #17418

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.

King County Metro's Central Base has operated as a bus fueling and maintenance facility since 1973, more than a decade before 1986 — the year occurrence-based Commercial General Liability policies gave way to claims-made forms with absolute pollution exclusions. The petroleum contamination confirmed in groundwater beneath this facility is consistent with decades of fueling operations and underground storage tank use during that pre-1986 window. Remediation costs already incurred and those still ahead — investigation, cleanup design, and active groundwater remediation — represent expenditures that historical CGL carriers from the facility's pre-1986 operational period may be obligated 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

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.