Gas Station cleanup site — Restorical Research
Shawano Service Center - Waste Oil
Shawano, Shawano County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station predating 1986. Historical insurance policies issued during those prior operations and through 1986 could help fund the multi-phase investigation and remediation work ahead under Wisconsin DNR oversight.

This property operated as a full-service gas station and service center in Shawano, with four underground storage tanks handling waste oil, fuel oil, diesel, and unleaded gasoline. A previous Leaking Underground Storage Tank case was closed in 2006 with Continuing Obligations due to remaining petroleum contamination in soil and groundwater, and the Wisconsin DNR has explicitly characterized the contamination at this location as historic. A 2025 Geoprobe investigation confirmed groundwater contamination exceeding multiple NR 140 enforcement standards and preventive action limits, including benzene, total xylenes, trimethylbenzenes, naphthalene, and tetrachloroethene. That history could support an insurance coverage claim against the carriers who issued policies more than 40 years ago — coverage that could help fund the cleanup ahead.

Former Use
Former Gas Station
LocationShawano, Shawano County
Historical UseGas Station
Est. Operating SincePredating 1986
DNR ProgramEnvironmental Remediation Program
Contamination & Investigation
Site Assessment Summary
ContaminantsBenzene, total xylenes, trimethylbenzenes (TMBs), naphthalene, and tetrachloroethene (PCE) in groundwater; petroleum hydrocarbons in soil
Regulatory ProgramWisconsin DNR — NR 700
BRRTS #02-59-597235

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 Wisconsin — and those policies may provide coverage that remains enforceable today. 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 contamination at this property has been characterized by the Wisconsin DNR as historic, resulting from long-term fueling, vehicle service, and underground storage tank operations conducted at this location before 1986. The ongoing and future groundwater investigation, monitoring, and remediation work required to resolve exceedances of multiple NR 140 enforcement standards and preventive action limits — including benzene, total xylenes, trimethylbenzenes, naphthalene, and tetrachloroethene — represent costs that CGL carriers insuring the businesses that operated here before 1986 may be obligated to fund.

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

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 viable insurance coverage exists to fund the cleanup, 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.