Dry Cleaner cleanup site — Restorical Research
Mill Creek Plaza
16310 Bothell Everett Hwy, Mill Creek, Snohomish County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a dry cleaning facility predating 1986. Historical insurance policies issued during those prior operations and through 1986 could fund a cleanup — and recover costs already spent.

This shopping plaza property is the site of contamination originating from a retail space formerly occupied by a dry cleaning operation, which released perchloroethylene (PCE) and its chlorinated degradation products — trichloroethylene (TCE), cis-dichloroethylene (cis-DCE), and vinyl chloride (VC) — into the soil and groundwater. Cleanup under the Voluntary Cleanup Program has included soil excavation and off-site disposal of the highest-concentration source area soils, rerouting of contaminated footing drain discharge to the sanitary sewer, and on-site treatment of pumped groundwater. Groundwater monitoring and sewer discharge monitoring are ongoing. That history could support an insurance cost recovery claim against carriers who issued insurance policies 40+ years ago.

Former Use
Former Dry Cleaner
Address16310 Bothell Everett Hwy, Mill Creek, Snohomish County
Historical UseDry Cleaner
Est. Operating SincePre-1986
StatusCleanup Started
Contamination & Investigation
Site Assessment Summary
ContaminantsPerchloroethylene (PCE) and chlorinated degradation products (TCE, cis-DCE, vinyl chloride) detected in soil and groundwater
Media ImpactedSoil, Groundwater
Regulatory ProgramMTCA — Voluntary Cleanup Program
Ecology Site #4275

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 presence of PCE alongside its full chlorinated degradation sequence — TCE, cis-DCE, and vinyl chloride — is characteristic of dry cleaning operations that predate 1986, when occurrence-based Commercial General Liability policies carried no effective pollution exclusion in Washington. The documented history of investigations and remediation actions at this plaza, including source-area excavation, groundwater treatment, and continuing discharge monitoring, represents accumulated cleanup expenditures traceable to a release from that pre-1986 operational period. Historical carriers who issued CGL policies while the dry cleaner was in operation may be obligated both to recover those documented 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.