Gas Station cleanup site — Restorical Research
Bentz Shell Fmr
Waupun, Dodge County
Restorical Research
Preliminary Site-Specific Analysis

This property has a documented history as a gasoline service station going back to 1930. Historical insurance policies issued during those prior operations and through 1986 could help fund the ongoing cleanup and groundwater monitoring obligations that Wisconsin DNR continues to oversee.

This property has operated as a gasoline service station since the 1930s, with underground storage tanks in place for decades before additional 12,000-gallon and 5,000-gallon gasoline USTs were installed in 1976. Petroleum releases were confirmed from these long-running fueling operations, including a documented spill incident in 1983, and a widespread groundwater plume has migrated off-site into the public right-of-way and onto adjacent municipal property. Seven monitoring wells — four on-site and three off-site — have confirmed groundwater exceedances of Wisconsin NR 140 standards, and the site was reopened by Wisconsin DNR in 2023 after tank removal revealed significantly elevated contamination levels, with a Subsurface Investigation Report submitted in March 2025. 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
LocationWaupun, Dodge County
Historical UseGas Station
Est. Operating Since1930
DNR ProgramLeaking UST Program
Contamination & Investigation
Site Assessment Summary
ContaminantsPetroleum hydrocarbons from leaking underground storage tanks in soil and groundwater
Regulatory ProgramWisconsin DNR — NR 700
BRRTS #03-14-591333

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.

Petroleum fueling operations at this property date to the 1930s, with underground storage tanks installed and actively dispensing fuel for decades before 1986 — including additional gasoline USTs added in 1976 and a documented spill incident in 1983. The ongoing Wisconsin DNR-directed subsurface investigation, groundwater monitoring across seven on-site and off-site wells, and the remediation required to address a widespread plume that has migrated into the public right-of-way and onto adjacent municipal property represent substantial future costs that the historical pre-1986 carriers insuring those operations 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.